diff --git a/libcxx/include/__algorithm/clamp.h b/libcxx/include/__algorithm/clamp.h
--- a/libcxx/include/__algorithm/clamp.h
+++ b/libcxx/include/__algorithm/clamp.h
@@ -19,7 +19,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template<class _Tp, class _Compare>
 _LIBCPP_NODISCARD_EXT inline
 _LIBCPP_INLINE_VISIBILITY constexpr
diff --git a/libcxx/include/__algorithm/equal.h b/libcxx/include/__algorithm/equal.h
--- a/libcxx/include/__algorithm/equal.h
+++ b/libcxx/include/__algorithm/equal.h
@@ -36,7 +36,7 @@
   return std::equal(__first1, __last1, __first2, __equal_to());
 }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _BinaryPredicate, class _InputIterator1, class _InputIterator2>
 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 bool
 __equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2,
diff --git a/libcxx/include/__algorithm/for_each_n.h b/libcxx/include/__algorithm/for_each_n.h
--- a/libcxx/include/__algorithm/for_each_n.h
+++ b/libcxx/include/__algorithm/for_each_n.h
@@ -19,7 +19,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 template <class _InputIterator, class _Size, class _Function>
 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 _InputIterator for_each_n(_InputIterator __first,
diff --git a/libcxx/include/__algorithm/in_found_result.h b/libcxx/include/__algorithm/in_found_result.h
--- a/libcxx/include/__algorithm/in_found_result.h
+++ b/libcxx/include/__algorithm/in_found_result.h
@@ -18,7 +18,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -44,6 +44,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_IN_FOUND_RESULT_H
diff --git a/libcxx/include/__algorithm/in_fun_result.h b/libcxx/include/__algorithm/in_fun_result.h
--- a/libcxx/include/__algorithm/in_fun_result.h
+++ b/libcxx/include/__algorithm/in_fun_result.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
 template <class _InIter1, class _Func1>
@@ -42,7 +42,7 @@
 };
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__algorithm/in_in_out_result.h b/libcxx/include/__algorithm/in_in_out_result.h
--- a/libcxx/include/__algorithm/in_in_out_result.h
+++ b/libcxx/include/__algorithm/in_in_out_result.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
 
@@ -49,7 +49,7 @@
 
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__algorithm/in_in_result.h b/libcxx/include/__algorithm/in_in_result.h
--- a/libcxx/include/__algorithm/in_in_result.h
+++ b/libcxx/include/__algorithm/in_in_result.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
 
@@ -46,7 +46,7 @@
 
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__algorithm/in_out_out_result.h b/libcxx/include/__algorithm/in_out_out_result.h
--- a/libcxx/include/__algorithm/in_out_out_result.h
+++ b/libcxx/include/__algorithm/in_out_out_result.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
 template <class _InIter1, class _OutIter1, class _OutIter2>
@@ -47,7 +47,7 @@
 };
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__algorithm/in_out_result.h b/libcxx/include/__algorithm/in_out_result.h
--- a/libcxx/include/__algorithm/in_out_result.h
+++ b/libcxx/include/__algorithm/in_out_result.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
 
@@ -46,7 +46,7 @@
 
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__algorithm/is_permutation.h b/libcxx/include/__algorithm/is_permutation.h
--- a/libcxx/include/__algorithm/is_permutation.h
+++ b/libcxx/include/__algorithm/is_permutation.h
@@ -31,7 +31,7 @@
 template <class _Iter1, class _Sent1, class _Iter2, class _Sent2, class = void>
 struct _ConstTimeDistance : false_type {};
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class _Iter1, class _Sent1, class _Iter2, class _Sent2>
 struct _ConstTimeDistance<_Iter1, _Sent1, _Iter2, _Sent2, __enable_if_t<
@@ -47,7 +47,7 @@
     is_same<typename iterator_traits<_Iter2>::iterator_category, random_access_iterator_tag>::value
 > > : true_type {};
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 // Internal functions
 
@@ -202,7 +202,7 @@
   return std::is_permutation(__first1, __last1, __first2, __equal_to());
 }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 
 // 2+2 iterators
 template <class _ForwardIterator1, class _ForwardIterator2>
@@ -231,7 +231,7 @@
       __pred, __identity(), __identity());
 }
 
-#endif // _LIBCPP_STD_VER > 11
+#endif // _LIBCPP_STD_VER >= 14
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__algorithm/iterator_operations.h b/libcxx/include/__algorithm/iterator_operations.h
--- a/libcxx/include/__algorithm/iterator_operations.h
+++ b/libcxx/include/__algorithm/iterator_operations.h
@@ -37,7 +37,7 @@
 
 template <class _AlgPolicy> struct _IterOps;
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 struct _RangeAlgPolicy {};
 
 template <>
diff --git a/libcxx/include/__algorithm/lexicographical_compare_three_way.h b/libcxx/include/__algorithm/lexicographical_compare_three_way.h
--- a/libcxx/include/__algorithm/lexicographical_compare_three_way.h
+++ b/libcxx/include/__algorithm/lexicographical_compare_three_way.h
@@ -29,7 +29,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // Fast path for random access iterators which computes the number of loop iterations up-front and
 // then skips the iterator comparisons inside the loop.
@@ -116,7 +116,7 @@
       std::move(__first1), std::move(__last1), std::move(__first2), std::move(__last2), std::compare_three_way());
 }
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__algorithm/make_projected.h b/libcxx/include/__algorithm/make_projected.h
--- a/libcxx/include/__algorithm/make_projected.h
+++ b/libcxx/include/__algorithm/make_projected.h
@@ -61,7 +61,7 @@
 template <class _Pred, class _Proj>
 struct __can_use_pristine_comp<_Pred, _Proj, __enable_if_t<
     !is_member_pointer<typename decay<_Pred>::type>::value && (
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
       is_same<typename decay<_Proj>::type, identity>::value ||
 #endif
       is_same<typename decay<_Proj>::type, __identity>::value
@@ -93,7 +93,7 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -121,6 +121,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_MAKE_PROJECTED_H
diff --git a/libcxx/include/__algorithm/min_max_result.h b/libcxx/include/__algorithm/min_max_result.h
--- a/libcxx/include/__algorithm/min_max_result.h
+++ b/libcxx/include/__algorithm/min_max_result.h
@@ -23,7 +23,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
 
@@ -47,7 +47,7 @@
 
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__algorithm/mismatch.h b/libcxx/include/__algorithm/mismatch.h
--- a/libcxx/include/__algorithm/mismatch.h
+++ b/libcxx/include/__algorithm/mismatch.h
@@ -38,7 +38,7 @@
   return std::mismatch(__first1, __last1, __first2, __equal_to());
 }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _InputIterator1, class _InputIterator2, class _BinaryPredicate>
 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY
     _LIBCPP_CONSTEXPR_SINCE_CXX20 pair<_InputIterator1, _InputIterator2>
diff --git a/libcxx/include/__algorithm/ranges_adjacent_find.h b/libcxx/include/__algorithm/ranges_adjacent_find.h
--- a/libcxx/include/__algorithm/ranges_adjacent_find.h
+++ b/libcxx/include/__algorithm/ranges_adjacent_find.h
@@ -24,7 +24,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -73,6 +73,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_ADJACENT_FIND_H
diff --git a/libcxx/include/__algorithm/ranges_all_of.h b/libcxx/include/__algorithm/ranges_all_of.h
--- a/libcxx/include/__algorithm/ranges_all_of.h
+++ b/libcxx/include/__algorithm/ranges_all_of.h
@@ -22,7 +22,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -63,6 +63,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_ALL_OF_H
diff --git a/libcxx/include/__algorithm/ranges_any_of.h b/libcxx/include/__algorithm/ranges_any_of.h
--- a/libcxx/include/__algorithm/ranges_any_of.h
+++ b/libcxx/include/__algorithm/ranges_any_of.h
@@ -22,7 +22,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -63,6 +63,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_ANY_OF_H
diff --git a/libcxx/include/__algorithm/ranges_binary_search.h b/libcxx/include/__algorithm/ranges_binary_search.h
--- a/libcxx/include/__algorithm/ranges_binary_search.h
+++ b/libcxx/include/__algorithm/ranges_binary_search.h
@@ -24,7 +24,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -58,6 +58,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_BINARY_SEARCH_H
diff --git a/libcxx/include/__algorithm/ranges_clamp.h b/libcxx/include/__algorithm/ranges_clamp.h
--- a/libcxx/include/__algorithm/ranges_clamp.h
+++ b/libcxx/include/__algorithm/ranges_clamp.h
@@ -22,7 +22,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -60,6 +60,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_CLAMP_H
diff --git a/libcxx/include/__algorithm/ranges_copy.h b/libcxx/include/__algorithm/ranges_copy.h
--- a/libcxx/include/__algorithm/ranges_copy.h
+++ b/libcxx/include/__algorithm/ranges_copy.h
@@ -25,7 +25,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -62,6 +62,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_COPY_H
diff --git a/libcxx/include/__algorithm/ranges_copy_backward.h b/libcxx/include/__algorithm/ranges_copy_backward.h
--- a/libcxx/include/__algorithm/ranges_copy_backward.h
+++ b/libcxx/include/__algorithm/ranges_copy_backward.h
@@ -23,7 +23,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -60,6 +60,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_COPY_BACKWARD_H
diff --git a/libcxx/include/__algorithm/ranges_copy_if.h b/libcxx/include/__algorithm/ranges_copy_if.h
--- a/libcxx/include/__algorithm/ranges_copy_if.h
+++ b/libcxx/include/__algorithm/ranges_copy_if.h
@@ -24,7 +24,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -76,6 +76,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_COPY_IF_H
diff --git a/libcxx/include/__algorithm/ranges_copy_n.h b/libcxx/include/__algorithm/ranges_copy_n.h
--- a/libcxx/include/__algorithm/ranges_copy_n.h
+++ b/libcxx/include/__algorithm/ranges_copy_n.h
@@ -27,7 +27,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
 
@@ -70,7 +70,7 @@
 } // namespace __cpo
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__algorithm/ranges_count.h b/libcxx/include/__algorithm/ranges_count.h
--- a/libcxx/include/__algorithm/ranges_count.h
+++ b/libcxx/include/__algorithm/ranges_count.h
@@ -25,7 +25,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -57,6 +57,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_COUNT_H
diff --git a/libcxx/include/__algorithm/ranges_count_if.h b/libcxx/include/__algorithm/ranges_count_if.h
--- a/libcxx/include/__algorithm/ranges_count_if.h
+++ b/libcxx/include/__algorithm/ranges_count_if.h
@@ -25,7 +25,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -67,6 +67,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_COUNT_IF_H
diff --git a/libcxx/include/__algorithm/ranges_equal.h b/libcxx/include/__algorithm/ranges_equal.h
--- a/libcxx/include/__algorithm/ranges_equal.h
+++ b/libcxx/include/__algorithm/ranges_equal.h
@@ -24,7 +24,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -110,6 +110,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_EQUAL_H
diff --git a/libcxx/include/__algorithm/ranges_equal_range.h b/libcxx/include/__algorithm/ranges_equal_range.h
--- a/libcxx/include/__algorithm/ranges_equal_range.h
+++ b/libcxx/include/__algorithm/ranges_equal_range.h
@@ -30,7 +30,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -73,6 +73,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_EQUAL_RANGE_H
diff --git a/libcxx/include/__algorithm/ranges_fill.h b/libcxx/include/__algorithm/ranges_fill.h
--- a/libcxx/include/__algorithm/ranges_fill.h
+++ b/libcxx/include/__algorithm/ranges_fill.h
@@ -20,7 +20,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -54,6 +54,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_FILL_H
diff --git a/libcxx/include/__algorithm/ranges_fill_n.h b/libcxx/include/__algorithm/ranges_fill_n.h
--- a/libcxx/include/__algorithm/ranges_fill_n.h
+++ b/libcxx/include/__algorithm/ranges_fill_n.h
@@ -17,7 +17,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -43,6 +43,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_FILL_N_H
diff --git a/libcxx/include/__algorithm/ranges_find.h b/libcxx/include/__algorithm/ranges_find.h
--- a/libcxx/include/__algorithm/ranges_find.h
+++ b/libcxx/include/__algorithm/ranges_find.h
@@ -26,7 +26,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -58,6 +58,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_FIND_H
diff --git a/libcxx/include/__algorithm/ranges_find_end.h b/libcxx/include/__algorithm/ranges_find_end.h
--- a/libcxx/include/__algorithm/ranges_find_end.h
+++ b/libcxx/include/__algorithm/ranges_find_end.h
@@ -27,7 +27,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -93,6 +93,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_FIND_END_H
diff --git a/libcxx/include/__algorithm/ranges_find_first_of.h b/libcxx/include/__algorithm/ranges_find_first_of.h
--- a/libcxx/include/__algorithm/ranges_find_first_of.h
+++ b/libcxx/include/__algorithm/ranges_find_first_of.h
@@ -24,7 +24,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -96,6 +96,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_FIND_FIRST_OF_H
diff --git a/libcxx/include/__algorithm/ranges_find_if.h b/libcxx/include/__algorithm/ranges_find_if.h
--- a/libcxx/include/__algorithm/ranges_find_if.h
+++ b/libcxx/include/__algorithm/ranges_find_if.h
@@ -24,7 +24,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -66,6 +66,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_FIND_IF_H
diff --git a/libcxx/include/__algorithm/ranges_find_if_not.h b/libcxx/include/__algorithm/ranges_find_if_not.h
--- a/libcxx/include/__algorithm/ranges_find_if_not.h
+++ b/libcxx/include/__algorithm/ranges_find_if_not.h
@@ -26,7 +26,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -58,6 +58,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_FIND_IF_NOT_H
diff --git a/libcxx/include/__algorithm/ranges_for_each.h b/libcxx/include/__algorithm/ranges_for_each.h
--- a/libcxx/include/__algorithm/ranges_for_each.h
+++ b/libcxx/include/__algorithm/ranges_for_each.h
@@ -24,7 +24,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -73,6 +73,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_FOR_EACH_H
diff --git a/libcxx/include/__algorithm/ranges_for_each_n.h b/libcxx/include/__algorithm/ranges_for_each_n.h
--- a/libcxx/include/__algorithm/ranges_for_each_n.h
+++ b/libcxx/include/__algorithm/ranges_for_each_n.h
@@ -24,7 +24,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -61,6 +61,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_FOR_EACH_N_H
diff --git a/libcxx/include/__algorithm/ranges_generate.h b/libcxx/include/__algorithm/ranges_generate.h
--- a/libcxx/include/__algorithm/ranges_generate.h
+++ b/libcxx/include/__algorithm/ranges_generate.h
@@ -24,7 +24,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -68,6 +68,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_GENERATE_H
diff --git a/libcxx/include/__algorithm/ranges_generate_n.h b/libcxx/include/__algorithm/ranges_generate_n.h
--- a/libcxx/include/__algorithm/ranges_generate_n.h
+++ b/libcxx/include/__algorithm/ranges_generate_n.h
@@ -25,7 +25,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -57,6 +57,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_GENERATE_N_H
diff --git a/libcxx/include/__algorithm/ranges_includes.h b/libcxx/include/__algorithm/ranges_includes.h
--- a/libcxx/include/__algorithm/ranges_includes.h
+++ b/libcxx/include/__algorithm/ranges_includes.h
@@ -27,7 +27,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -90,6 +90,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_INCLUDES_H
diff --git a/libcxx/include/__algorithm/ranges_inplace_merge.h b/libcxx/include/__algorithm/ranges_inplace_merge.h
--- a/libcxx/include/__algorithm/ranges_inplace_merge.h
+++ b/libcxx/include/__algorithm/ranges_inplace_merge.h
@@ -31,7 +31,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -80,6 +80,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_INPLACE_MERGE_H
diff --git a/libcxx/include/__algorithm/ranges_is_heap.h b/libcxx/include/__algorithm/ranges_is_heap.h
--- a/libcxx/include/__algorithm/ranges_is_heap.h
+++ b/libcxx/include/__algorithm/ranges_is_heap.h
@@ -26,7 +26,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -69,6 +69,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_IS_HEAP_H
diff --git a/libcxx/include/__algorithm/ranges_is_heap_until.h b/libcxx/include/__algorithm/ranges_is_heap_until.h
--- a/libcxx/include/__algorithm/ranges_is_heap_until.h
+++ b/libcxx/include/__algorithm/ranges_is_heap_until.h
@@ -27,7 +27,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -70,6 +70,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_IS_HEAP_UNTIL_H
diff --git a/libcxx/include/__algorithm/ranges_is_partitioned.h b/libcxx/include/__algorithm/ranges_is_partitioned.h
--- a/libcxx/include/__algorithm/ranges_is_partitioned.h
+++ b/libcxx/include/__algorithm/ranges_is_partitioned.h
@@ -23,7 +23,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -76,6 +76,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_IS_PARTITIONED_H
diff --git a/libcxx/include/__algorithm/ranges_is_permutation.h b/libcxx/include/__algorithm/ranges_is_permutation.h
--- a/libcxx/include/__algorithm/ranges_is_permutation.h
+++ b/libcxx/include/__algorithm/ranges_is_permutation.h
@@ -25,7 +25,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -84,6 +84,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_IS_PERMUTATION_H
diff --git a/libcxx/include/__algorithm/ranges_is_sorted.h b/libcxx/include/__algorithm/ranges_is_sorted.h
--- a/libcxx/include/__algorithm/ranges_is_sorted.h
+++ b/libcxx/include/__algorithm/ranges_is_sorted.h
@@ -23,7 +23,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -56,6 +56,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP__ALGORITHM_RANGES_IS_SORTED_H
diff --git a/libcxx/include/__algorithm/ranges_is_sorted_until.h b/libcxx/include/__algorithm/ranges_is_sorted_until.h
--- a/libcxx/include/__algorithm/ranges_is_sorted_until.h
+++ b/libcxx/include/__algorithm/ranges_is_sorted_until.h
@@ -24,7 +24,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -71,6 +71,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP__ALGORITHM_RANGES_IS_SORTED_UNTIL_H
diff --git a/libcxx/include/__algorithm/ranges_iterator_concept.h b/libcxx/include/__algorithm/ranges_iterator_concept.h
--- a/libcxx/include/__algorithm/ranges_iterator_concept.h
+++ b/libcxx/include/__algorithm/ranges_iterator_concept.h
@@ -18,7 +18,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -46,6 +46,6 @@
 } // namespace ranges
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_ITERATOR_CONCEPT_H
diff --git a/libcxx/include/__algorithm/ranges_lexicographical_compare.h b/libcxx/include/__algorithm/ranges_lexicographical_compare.h
--- a/libcxx/include/__algorithm/ranges_lexicographical_compare.h
+++ b/libcxx/include/__algorithm/ranges_lexicographical_compare.h
@@ -23,7 +23,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -93,6 +93,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_LEXICOGRAPHICAL_COMPARE_H
diff --git a/libcxx/include/__algorithm/ranges_lower_bound.h b/libcxx/include/__algorithm/ranges_lower_bound.h
--- a/libcxx/include/__algorithm/ranges_lower_bound.h
+++ b/libcxx/include/__algorithm/ranges_lower_bound.h
@@ -27,7 +27,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -61,6 +61,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_LOWER_BOUND_H
diff --git a/libcxx/include/__algorithm/ranges_make_heap.h b/libcxx/include/__algorithm/ranges_make_heap.h
--- a/libcxx/include/__algorithm/ranges_make_heap.h
+++ b/libcxx/include/__algorithm/ranges_make_heap.h
@@ -32,7 +32,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -75,6 +75,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_MAKE_HEAP_H
diff --git a/libcxx/include/__algorithm/ranges_max.h b/libcxx/include/__algorithm/ranges_max.h
--- a/libcxx/include/__algorithm/ranges_max.h
+++ b/libcxx/include/__algorithm/ranges_max.h
@@ -27,7 +27,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_PUSH_MACROS
 #include <__undef_macros>
@@ -91,6 +91,6 @@
 
 _LIBCPP_POP_MACROS
 
-#endif // _LIBCPP_STD_VER > 17 &&
+#endif // _LIBCPP_STD_VER >= 20 &&
 
 #endif // _LIBCPP___ALGORITHM_RANGES_MAX_H
diff --git a/libcxx/include/__algorithm/ranges_max_element.h b/libcxx/include/__algorithm/ranges_max_element.h
--- a/libcxx/include/__algorithm/ranges_max_element.h
+++ b/libcxx/include/__algorithm/ranges_max_element.h
@@ -24,7 +24,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -56,6 +56,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_MAX_ELEMENT_H
diff --git a/libcxx/include/__algorithm/ranges_merge.h b/libcxx/include/__algorithm/ranges_merge.h
--- a/libcxx/include/__algorithm/ranges_merge.h
+++ b/libcxx/include/__algorithm/ranges_merge.h
@@ -27,7 +27,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -137,6 +137,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_MERGE_H
diff --git a/libcxx/include/__algorithm/ranges_min.h b/libcxx/include/__algorithm/ranges_min.h
--- a/libcxx/include/__algorithm/ranges_min.h
+++ b/libcxx/include/__algorithm/ranges_min.h
@@ -26,7 +26,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_PUSH_MACROS
 #include <__undef_macros>
@@ -87,6 +87,6 @@
 
 _LIBCPP_POP_MACROS
 
-#endif // _LIBCPP_STD_VER > 17 &&
+#endif // _LIBCPP_STD_VER >= 20 &&
 
 #endif // _LIBCPP___ALGORITHM_RANGES_MIN_H
diff --git a/libcxx/include/__algorithm/ranges_min_element.h b/libcxx/include/__algorithm/ranges_min_element.h
--- a/libcxx/include/__algorithm/ranges_min_element.h
+++ b/libcxx/include/__algorithm/ranges_min_element.h
@@ -24,7 +24,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -69,6 +69,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_MIN_ELEMENT_H
diff --git a/libcxx/include/__algorithm/ranges_minmax.h b/libcxx/include/__algorithm/ranges_minmax.h
--- a/libcxx/include/__algorithm/ranges_minmax.h
+++ b/libcxx/include/__algorithm/ranges_minmax.h
@@ -32,7 +32,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_PUSH_MACROS
 #include <__undef_macros>
@@ -148,6 +148,6 @@
 
 _LIBCPP_POP_MACROS
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_MINMAX_H
diff --git a/libcxx/include/__algorithm/ranges_minmax_element.h b/libcxx/include/__algorithm/ranges_minmax_element.h
--- a/libcxx/include/__algorithm/ranges_minmax_element.h
+++ b/libcxx/include/__algorithm/ranges_minmax_element.h
@@ -28,7 +28,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -66,6 +66,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_MINMAX_H
diff --git a/libcxx/include/__algorithm/ranges_mismatch.h b/libcxx/include/__algorithm/ranges_mismatch.h
--- a/libcxx/include/__algorithm/ranges_mismatch.h
+++ b/libcxx/include/__algorithm/ranges_mismatch.h
@@ -27,7 +27,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
 
@@ -78,7 +78,7 @@
 } // namespace __cpo
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__algorithm/ranges_move.h b/libcxx/include/__algorithm/ranges_move.h
--- a/libcxx/include/__algorithm/ranges_move.h
+++ b/libcxx/include/__algorithm/ranges_move.h
@@ -23,7 +23,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -66,6 +66,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_MOVE_H
diff --git a/libcxx/include/__algorithm/ranges_move_backward.h b/libcxx/include/__algorithm/ranges_move_backward.h
--- a/libcxx/include/__algorithm/ranges_move_backward.h
+++ b/libcxx/include/__algorithm/ranges_move_backward.h
@@ -25,7 +25,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -68,6 +68,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_MOVE_BACKWARD_H
diff --git a/libcxx/include/__algorithm/ranges_next_permutation.h b/libcxx/include/__algorithm/ranges_next_permutation.h
--- a/libcxx/include/__algorithm/ranges_next_permutation.h
+++ b/libcxx/include/__algorithm/ranges_next_permutation.h
@@ -28,7 +28,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -68,6 +68,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_NEXT_PERMUTATION_H
diff --git a/libcxx/include/__algorithm/ranges_none_of.h b/libcxx/include/__algorithm/ranges_none_of.h
--- a/libcxx/include/__algorithm/ranges_none_of.h
+++ b/libcxx/include/__algorithm/ranges_none_of.h
@@ -22,7 +22,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -63,6 +63,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_NONE_OF_H
diff --git a/libcxx/include/__algorithm/ranges_nth_element.h b/libcxx/include/__algorithm/ranges_nth_element.h
--- a/libcxx/include/__algorithm/ranges_nth_element.h
+++ b/libcxx/include/__algorithm/ranges_nth_element.h
@@ -31,7 +31,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -75,6 +75,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_NTH_ELEMENT_H
diff --git a/libcxx/include/__algorithm/ranges_partial_sort.h b/libcxx/include/__algorithm/ranges_partial_sort.h
--- a/libcxx/include/__algorithm/ranges_partial_sort.h
+++ b/libcxx/include/__algorithm/ranges_partial_sort.h
@@ -33,7 +33,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -73,6 +73,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_PARTIAL_SORT_H
diff --git a/libcxx/include/__algorithm/ranges_partial_sort_copy.h b/libcxx/include/__algorithm/ranges_partial_sort_copy.h
--- a/libcxx/include/__algorithm/ranges_partial_sort_copy.h
+++ b/libcxx/include/__algorithm/ranges_partial_sort_copy.h
@@ -30,7 +30,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -87,6 +87,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_PARTIAL_SORT_COPY_H
diff --git a/libcxx/include/__algorithm/ranges_partition.h b/libcxx/include/__algorithm/ranges_partition.h
--- a/libcxx/include/__algorithm/ranges_partition.h
+++ b/libcxx/include/__algorithm/ranges_partition.h
@@ -32,7 +32,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -77,6 +77,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_PARTITION_H
diff --git a/libcxx/include/__algorithm/ranges_partition_copy.h b/libcxx/include/__algorithm/ranges_partition_copy.h
--- a/libcxx/include/__algorithm/ranges_partition_copy.h
+++ b/libcxx/include/__algorithm/ranges_partition_copy.h
@@ -25,7 +25,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -92,6 +92,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_PARTITION_COPY_H
diff --git a/libcxx/include/__algorithm/ranges_partition_point.h b/libcxx/include/__algorithm/ranges_partition_point.h
--- a/libcxx/include/__algorithm/ranges_partition_point.h
+++ b/libcxx/include/__algorithm/ranges_partition_point.h
@@ -27,7 +27,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -83,6 +83,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_PARTITION_POINT_H
diff --git a/libcxx/include/__algorithm/ranges_pop_heap.h b/libcxx/include/__algorithm/ranges_pop_heap.h
--- a/libcxx/include/__algorithm/ranges_pop_heap.h
+++ b/libcxx/include/__algorithm/ranges_pop_heap.h
@@ -32,7 +32,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -76,6 +76,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_POP_HEAP_H
diff --git a/libcxx/include/__algorithm/ranges_prev_permutation.h b/libcxx/include/__algorithm/ranges_prev_permutation.h
--- a/libcxx/include/__algorithm/ranges_prev_permutation.h
+++ b/libcxx/include/__algorithm/ranges_prev_permutation.h
@@ -28,7 +28,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -72,6 +72,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_PREV_PERMUTATION_H
diff --git a/libcxx/include/__algorithm/ranges_push_heap.h b/libcxx/include/__algorithm/ranges_push_heap.h
--- a/libcxx/include/__algorithm/ranges_push_heap.h
+++ b/libcxx/include/__algorithm/ranges_push_heap.h
@@ -32,7 +32,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -75,6 +75,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_PUSH_HEAP_H
diff --git a/libcxx/include/__algorithm/ranges_remove.h b/libcxx/include/__algorithm/ranges_remove.h
--- a/libcxx/include/__algorithm/ranges_remove.h
+++ b/libcxx/include/__algorithm/ranges_remove.h
@@ -25,7 +25,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -59,6 +59,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_REMOVE_H
diff --git a/libcxx/include/__algorithm/ranges_remove_copy.h b/libcxx/include/__algorithm/ranges_remove_copy.h
--- a/libcxx/include/__algorithm/ranges_remove_copy.h
+++ b/libcxx/include/__algorithm/ranges_remove_copy.h
@@ -26,7 +26,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -71,6 +71,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_REMOVE_COPY_H
diff --git a/libcxx/include/__algorithm/ranges_remove_copy_if.h b/libcxx/include/__algorithm/ranges_remove_copy_if.h
--- a/libcxx/include/__algorithm/ranges_remove_copy_if.h
+++ b/libcxx/include/__algorithm/ranges_remove_copy_if.h
@@ -29,7 +29,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -85,6 +85,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_REMOVE_COPY_IF_H
diff --git a/libcxx/include/__algorithm/ranges_remove_if.h b/libcxx/include/__algorithm/ranges_remove_if.h
--- a/libcxx/include/__algorithm/ranges_remove_if.h
+++ b/libcxx/include/__algorithm/ranges_remove_if.h
@@ -27,7 +27,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -80,6 +80,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_REMOVE_IF_H
diff --git a/libcxx/include/__algorithm/ranges_replace.h b/libcxx/include/__algorithm/ranges_replace.h
--- a/libcxx/include/__algorithm/ranges_replace.h
+++ b/libcxx/include/__algorithm/ranges_replace.h
@@ -24,7 +24,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -69,6 +69,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_REPLACE_H
diff --git a/libcxx/include/__algorithm/ranges_replace_copy.h b/libcxx/include/__algorithm/ranges_replace_copy.h
--- a/libcxx/include/__algorithm/ranges_replace_copy.h
+++ b/libcxx/include/__algorithm/ranges_replace_copy.h
@@ -26,7 +26,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -86,6 +86,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_REPLACE_COPY_H
diff --git a/libcxx/include/__algorithm/ranges_replace_copy_if.h b/libcxx/include/__algorithm/ranges_replace_copy_if.h
--- a/libcxx/include/__algorithm/ranges_replace_copy_if.h
+++ b/libcxx/include/__algorithm/ranges_replace_copy_if.h
@@ -24,7 +24,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -88,6 +88,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_REPLACE_COPY_IF_H
diff --git a/libcxx/include/__algorithm/ranges_replace_if.h b/libcxx/include/__algorithm/ranges_replace_if.h
--- a/libcxx/include/__algorithm/ranges_replace_if.h
+++ b/libcxx/include/__algorithm/ranges_replace_if.h
@@ -23,7 +23,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -72,6 +72,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_REPLACE_IF_H
diff --git a/libcxx/include/__algorithm/ranges_reverse.h b/libcxx/include/__algorithm/ranges_reverse.h
--- a/libcxx/include/__algorithm/ranges_reverse.h
+++ b/libcxx/include/__algorithm/ranges_reverse.h
@@ -22,7 +22,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -78,6 +78,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_REVERSE_H
diff --git a/libcxx/include/__algorithm/ranges_reverse_copy.h b/libcxx/include/__algorithm/ranges_reverse_copy.h
--- a/libcxx/include/__algorithm/ranges_reverse_copy.h
+++ b/libcxx/include/__algorithm/ranges_reverse_copy.h
@@ -25,7 +25,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -62,6 +62,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_REVERSE_COPY_H
diff --git a/libcxx/include/__algorithm/ranges_rotate.h b/libcxx/include/__algorithm/ranges_rotate.h
--- a/libcxx/include/__algorithm/ranges_rotate.h
+++ b/libcxx/include/__algorithm/ranges_rotate.h
@@ -25,7 +25,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -66,6 +66,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_ROTATE_H
diff --git a/libcxx/include/__algorithm/ranges_rotate_copy.h b/libcxx/include/__algorithm/ranges_rotate_copy.h
--- a/libcxx/include/__algorithm/ranges_rotate_copy.h
+++ b/libcxx/include/__algorithm/ranges_rotate_copy.h
@@ -23,7 +23,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -63,6 +63,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_ROTATE_COPY_H
diff --git a/libcxx/include/__algorithm/ranges_sample.h b/libcxx/include/__algorithm/ranges_sample.h
--- a/libcxx/include/__algorithm/ranges_sample.h
+++ b/libcxx/include/__algorithm/ranges_sample.h
@@ -27,7 +27,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -69,6 +69,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_SAMPLE_H
diff --git a/libcxx/include/__algorithm/ranges_search.h b/libcxx/include/__algorithm/ranges_search.h
--- a/libcxx/include/__algorithm/ranges_search.h
+++ b/libcxx/include/__algorithm/ranges_search.h
@@ -28,7 +28,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -130,6 +130,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_SEARCH_H
diff --git a/libcxx/include/__algorithm/ranges_search_n.h b/libcxx/include/__algorithm/ranges_search_n.h
--- a/libcxx/include/__algorithm/ranges_search_n.h
+++ b/libcxx/include/__algorithm/ranges_search_n.h
@@ -31,7 +31,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -112,6 +112,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_SEARCH_N_H
diff --git a/libcxx/include/__algorithm/ranges_set_difference.h b/libcxx/include/__algorithm/ranges_set_difference.h
--- a/libcxx/include/__algorithm/ranges_set_difference.h
+++ b/libcxx/include/__algorithm/ranges_set_difference.h
@@ -30,7 +30,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -102,5 +102,5 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 #endif // _LIBCPP___ALGORITHM_RANGES_SET_DIFFERENCE_H
diff --git a/libcxx/include/__algorithm/ranges_set_intersection.h b/libcxx/include/__algorithm/ranges_set_intersection.h
--- a/libcxx/include/__algorithm/ranges_set_intersection.h
+++ b/libcxx/include/__algorithm/ranges_set_intersection.h
@@ -28,7 +28,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -113,5 +113,5 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 #endif // _LIBCPP___ALGORITHM_RANGES_SET_INTERSECTION_H
diff --git a/libcxx/include/__algorithm/ranges_set_symmetric_difference.h b/libcxx/include/__algorithm/ranges_set_symmetric_difference.h
--- a/libcxx/include/__algorithm/ranges_set_symmetric_difference.h
+++ b/libcxx/include/__algorithm/ranges_set_symmetric_difference.h
@@ -28,7 +28,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -113,5 +113,5 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 #endif // _LIBCPP___ALGORITHM_RANGES_SET_SYMMETRIC_DIFFERENCE_H
diff --git a/libcxx/include/__algorithm/ranges_set_union.h b/libcxx/include/__algorithm/ranges_set_union.h
--- a/libcxx/include/__algorithm/ranges_set_union.h
+++ b/libcxx/include/__algorithm/ranges_set_union.h
@@ -31,7 +31,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -116,6 +116,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_SET_UNION_H
diff --git a/libcxx/include/__algorithm/ranges_shuffle.h b/libcxx/include/__algorithm/ranges_shuffle.h
--- a/libcxx/include/__algorithm/ranges_shuffle.h
+++ b/libcxx/include/__algorithm/ranges_shuffle.h
@@ -31,7 +31,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -66,6 +66,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_SHUFFLE_H
diff --git a/libcxx/include/__algorithm/ranges_sort.h b/libcxx/include/__algorithm/ranges_sort.h
--- a/libcxx/include/__algorithm/ranges_sort.h
+++ b/libcxx/include/__algorithm/ranges_sort.h
@@ -31,7 +31,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -74,6 +74,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_SORT_H
diff --git a/libcxx/include/__algorithm/ranges_sort_heap.h b/libcxx/include/__algorithm/ranges_sort_heap.h
--- a/libcxx/include/__algorithm/ranges_sort_heap.h
+++ b/libcxx/include/__algorithm/ranges_sort_heap.h
@@ -32,7 +32,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -75,6 +75,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_SORT_HEAP_H
diff --git a/libcxx/include/__algorithm/ranges_stable_partition.h b/libcxx/include/__algorithm/ranges_stable_partition.h
--- a/libcxx/include/__algorithm/ranges_stable_partition.h
+++ b/libcxx/include/__algorithm/ranges_stable_partition.h
@@ -34,7 +34,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -83,6 +83,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_STABLE_PARTITION_H
diff --git a/libcxx/include/__algorithm/ranges_stable_sort.h b/libcxx/include/__algorithm/ranges_stable_sort.h
--- a/libcxx/include/__algorithm/ranges_stable_sort.h
+++ b/libcxx/include/__algorithm/ranges_stable_sort.h
@@ -31,7 +31,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -74,6 +74,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_STABLE_SORT_H
diff --git a/libcxx/include/__algorithm/ranges_swap_ranges.h b/libcxx/include/__algorithm/ranges_swap_ranges.h
--- a/libcxx/include/__algorithm/ranges_swap_ranges.h
+++ b/libcxx/include/__algorithm/ranges_swap_ranges.h
@@ -24,7 +24,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -63,6 +63,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_SWAP_RANGES_H
diff --git a/libcxx/include/__algorithm/ranges_transform.h b/libcxx/include/__algorithm/ranges_transform.h
--- a/libcxx/include/__algorithm/ranges_transform.h
+++ b/libcxx/include/__algorithm/ranges_transform.h
@@ -26,7 +26,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -165,6 +165,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_TRANSFORM_H
diff --git a/libcxx/include/__algorithm/ranges_unique.h b/libcxx/include/__algorithm/ranges_unique.h
--- a/libcxx/include/__algorithm/ranges_unique.h
+++ b/libcxx/include/__algorithm/ranges_unique.h
@@ -32,7 +32,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -74,6 +74,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_UNIQUE_H
diff --git a/libcxx/include/__algorithm/ranges_unique_copy.h b/libcxx/include/__algorithm/ranges_unique_copy.h
--- a/libcxx/include/__algorithm/ranges_unique_copy.h
+++ b/libcxx/include/__algorithm/ranges_unique_copy.h
@@ -33,7 +33,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -111,6 +111,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_UNIQUE_COPY_H
diff --git a/libcxx/include/__algorithm/ranges_upper_bound.h b/libcxx/include/__algorithm/ranges_upper_bound.h
--- a/libcxx/include/__algorithm/ranges_upper_bound.h
+++ b/libcxx/include/__algorithm/ranges_upper_bound.h
@@ -25,7 +25,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -70,6 +70,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_UPPER_BOUND_H
diff --git a/libcxx/include/__algorithm/sample.h b/libcxx/include/__algorithm/sample.h
--- a/libcxx/include/__algorithm/sample.h
+++ b/libcxx/include/__algorithm/sample.h
@@ -88,7 +88,7 @@
       __g, _PopIterCategory());
 }
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _PopulationIterator, class _SampleIterator, class _Distance,
           class _UniformRandomNumberGenerator>
 inline _LIBCPP_INLINE_VISIBILITY
@@ -103,7 +103,7 @@
       std::move(__first), std::move(__last), std::move(__output_iter), __n, __g);
 }
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__algorithm/search.h b/libcxx/include/__algorithm/search.h
--- a/libcxx/include/__algorithm/search.h
+++ b/libcxx/include/__algorithm/search.h
@@ -188,7 +188,7 @@
   return std::search(__first1, __last1, __first2, __last2, __equal_to());
 }
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _ForwardIterator, class _Searcher>
 _LIBCPP_NODISCARD_EXT _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator
 search(_ForwardIterator __f, _ForwardIterator __l, const _Searcher& __s) {
diff --git a/libcxx/include/__algorithm/shift_left.h b/libcxx/include/__algorithm/shift_left.h
--- a/libcxx/include/__algorithm/shift_left.h
+++ b/libcxx/include/__algorithm/shift_left.h
@@ -19,7 +19,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class _ForwardIterator>
 inline _LIBCPP_INLINE_VISIBILITY constexpr
@@ -48,7 +48,7 @@
     return _VSTD::move(__m, __last, __first);
 }
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__algorithm/shift_right.h b/libcxx/include/__algorithm/shift_right.h
--- a/libcxx/include/__algorithm/shift_right.h
+++ b/libcxx/include/__algorithm/shift_right.h
@@ -22,7 +22,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class _ForwardIterator>
 inline _LIBCPP_INLINE_VISIBILITY constexpr
@@ -94,7 +94,7 @@
     }
 }
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__algorithm/sort.h b/libcxx/include/__algorithm/sort.h
--- a/libcxx/include/__algorithm/sort.h
+++ b/libcxx/include/__algorithm/sort.h
@@ -140,7 +140,7 @@
 struct __is_simple_comparator<less<_Tp>&> : true_type {};
 template <class _Tp>
 struct __is_simple_comparator<greater<_Tp>&> : true_type {};
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <>
 struct __is_simple_comparator<ranges::less&> : true_type {};
 template <>
diff --git a/libcxx/include/__algorithm/three_way_comp_ref_type.h b/libcxx/include/__algorithm/three_way_comp_ref_type.h
--- a/libcxx/include/__algorithm/three_way_comp_ref_type.h
+++ b/libcxx/include/__algorithm/three_way_comp_ref_type.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class _Comp>
 struct __debug_three_way_comp {
@@ -63,7 +63,7 @@
 using __three_way_comp_ref_type = _Comp&;
 #  endif
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__algorithm/uniform_random_bit_generator_adaptor.h b/libcxx/include/__algorithm/uniform_random_bit_generator_adaptor.h
--- a/libcxx/include/__algorithm/uniform_random_bit_generator_adaptor.h
+++ b/libcxx/include/__algorithm/uniform_random_bit_generator_adaptor.h
@@ -17,7 +17,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_PUSH_MACROS
 #include <__undef_macros>
@@ -57,6 +57,6 @@
 
 _LIBCPP_POP_MACROS
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___ALGORITHM_RANGES_UNIFORM_RANDOM_BIT_GENERATOR_ADAPTOR_H
diff --git a/libcxx/include/__algorithm/unwrap_range.h b/libcxx/include/__algorithm/unwrap_range.h
--- a/libcxx/include/__algorithm/unwrap_range.h
+++ b/libcxx/include/__algorithm/unwrap_range.h
@@ -28,7 +28,7 @@
 // __unwrap_iter and __rewrap_iter don't work for this, because they assume that the iterator and sentinel have
 // the same type. __unwrap_range tries to get two iterators and then forward to __unwrap_iter.
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Iter, class _Sent>
 struct __unwrap_range_impl {
   _LIBCPP_HIDE_FROM_ABI static constexpr auto __unwrap(_Iter __first, _Sent __sent)
@@ -80,7 +80,7 @@
 _LIBCPP_HIDE_FROM_ABI constexpr _Iter __rewrap_range(_Iter __orig_iter, _Unwrapped __iter) {
   return __unwrap_range_impl<_Iter, _Sent>::__rewrap(std::move(__orig_iter), std::move(__iter));
 }
-#else  // _LIBCPP_STD_VER > 17
+#else  // _LIBCPP_STD_VER >= 20
 template <class _Iter, class _Unwrapped = decltype(std::__unwrap_iter(std::declval<_Iter>()))>
 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR pair<_Unwrapped, _Unwrapped> __unwrap_range(_Iter __first, _Iter __last) {
   return std::make_pair(std::__unwrap_iter(std::move(__first)), std::__unwrap_iter(std::move(__last)));
@@ -90,7 +90,7 @@
 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _Iter __rewrap_range(_Iter __orig_iter, _Unwrapped __iter) {
   return std::__rewrap_iter(std::move(__orig_iter), std::move(__iter));
 }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__bit/bit_cast.h b/libcxx/include/__bit/bit_cast.h
--- a/libcxx/include/__bit/bit_cast.h
+++ b/libcxx/include/__bit/bit_cast.h
@@ -19,7 +19,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class _ToType, class _FromType>
   requires(sizeof(_ToType) == sizeof(_FromType) &&
@@ -29,7 +29,7 @@
   return __builtin_bit_cast(_ToType, __from);
 }
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__bit/byteswap.h b/libcxx/include/__bit/byteswap.h
--- a/libcxx/include/__bit/byteswap.h
+++ b/libcxx/include/__bit/byteswap.h
@@ -21,7 +21,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
 
 template <integral _Tp>
 _LIBCPP_HIDE_FROM_ABI constexpr _Tp byteswap(_Tp __val) noexcept {
@@ -48,7 +48,7 @@
   }
 }
 
-#endif // _LIBCPP_STD_VER > 20
+#endif // _LIBCPP_STD_VER >= 23
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__bit_reference b/libcxx/include/__bit_reference
--- a/libcxx/include/__bit_reference
+++ b/libcxx/include/__bit_reference
@@ -75,7 +75,7 @@
         return *this;
     }
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
     _LIBCPP_HIDE_FROM_ABI constexpr const __bit_reference& operator=(bool __x) const noexcept {
         if (__x)
             *__seg_ |= __mask_;
@@ -1135,7 +1135,7 @@
 
 public:
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator() _NOEXCEPT
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     : __seg_(nullptr), __ctz_(0)
 #endif
     {}
diff --git a/libcxx/include/__charconv/chars_format.h b/libcxx/include/__charconv/chars_format.h
--- a/libcxx/include/__charconv/chars_format.h
+++ b/libcxx/include/__charconv/chars_format.h
@@ -19,7 +19,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 enum class _LIBCPP_ENUM_VIS chars_format
 {
@@ -70,7 +70,7 @@
   return __x;
 }
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__charconv/from_chars_result.h b/libcxx/include/__charconv/from_chars_result.h
--- a/libcxx/include/__charconv/from_chars_result.h
+++ b/libcxx/include/__charconv/from_chars_result.h
@@ -19,18 +19,18 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 struct _LIBCPP_TYPE_VIS from_chars_result
 {
     const char* ptr;
     errc ec;
-#  if _LIBCPP_STD_VER > 17
+#  if _LIBCPP_STD_VER >= 20
     _LIBCPP_HIDE_FROM_ABI friend bool operator==(const from_chars_result&, const from_chars_result&) = default;
 #  endif
 };
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__charconv/tables.h b/libcxx/include/__charconv/tables.h
--- a/libcxx/include/__charconv/tables.h
+++ b/libcxx/include/__charconv/tables.h
@@ -19,7 +19,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 namespace __itoa {
 
@@ -147,7 +147,7 @@
 
 } // namespace __itoa
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__charconv/to_chars_base_10.h b/libcxx/include/__charconv/to_chars_base_10.h
--- a/libcxx/include/__charconv/to_chars_base_10.h
+++ b/libcxx/include/__charconv/to_chars_base_10.h
@@ -25,7 +25,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 namespace __itoa {
 
@@ -176,7 +176,7 @@
 #  endif
 } // namespace __itoa
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__charconv/to_chars_result.h b/libcxx/include/__charconv/to_chars_result.h
--- a/libcxx/include/__charconv/to_chars_result.h
+++ b/libcxx/include/__charconv/to_chars_result.h
@@ -19,18 +19,18 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 struct _LIBCPP_TYPE_VIS to_chars_result
 {
     char* ptr;
     errc ec;
-#  if _LIBCPP_STD_VER > 17
+#  if _LIBCPP_STD_VER >= 20
     _LIBCPP_HIDE_FROM_ABI friend bool operator==(const to_chars_result&, const to_chars_result&) = default;
 #  endif
 };
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__chrono/calendar.h b/libcxx/include/__chrono/calendar.h
--- a/libcxx/include/__chrono/calendar.h
+++ b/libcxx/include/__chrono/calendar.h
@@ -18,7 +18,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -39,6 +39,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___CHRONO_CALENDAR_H
diff --git a/libcxx/include/__chrono/convert_to_tm.h b/libcxx/include/__chrono/convert_to_tm.h
--- a/libcxx/include/__chrono/convert_to_tm.h
+++ b/libcxx/include/__chrono/convert_to_tm.h
@@ -42,7 +42,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // Conerts a chrono date and weekday to a given _Tm type.
 //
@@ -136,7 +136,7 @@
   return __result;
 }
 
-#endif //if _LIBCPP_STD_VER > 17
+#endif //if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__chrono/day.h b/libcxx/include/__chrono/day.h
--- a/libcxx/include/__chrono/day.h
+++ b/libcxx/include/__chrono/day.h
@@ -18,7 +18,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -79,6 +79,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___CHRONO_DAY_H
diff --git a/libcxx/include/__chrono/duration.h b/libcxx/include/__chrono/duration.h
--- a/libcxx/include/__chrono/duration.h
+++ b/libcxx/include/__chrono/duration.h
@@ -130,7 +130,7 @@
 template <class _Rep>
 struct _LIBCPP_TEMPLATE_VIS treat_as_floating_point : is_floating_point<_Rep> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Rep>
 inline constexpr bool treat_as_floating_point_v = treat_as_floating_point<_Rep>::value;
 #endif
@@ -144,7 +144,7 @@
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR _Rep min()  _NOEXCEPT {return numeric_limits<_Rep>::lowest();}
 };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _ToDuration, class _Rep, class _Period>
 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
 typename enable_if
@@ -307,7 +307,7 @@
 typedef duration<long long              > seconds;
 typedef duration<     long, ratio<  60> > minutes;
 typedef duration<     long, ratio<3600> > hours;
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 typedef duration<     int, ratio_multiply<ratio<24>, hours::period>>         days;
 typedef duration<     int, ratio_multiply<ratio<7>,   days::period>>         weeks;
 typedef duration<     int, ratio_multiply<ratio<146097, 400>, days::period>> years;
@@ -530,7 +530,7 @@
 
 } // namespace chrono
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 // Suffixes for duration literals [time.duration.literals]
 inline namespace literals
 {
@@ -609,7 +609,7 @@
    using namespace literals::chrono_literals;
 } // namespace chrono
 
-#endif // _LIBCPP_STD_VER > 11
+#endif // _LIBCPP_STD_VER >= 14
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__chrono/file_clock.h b/libcxx/include/__chrono/file_clock.h
--- a/libcxx/include/__chrono/file_clock.h
+++ b/libcxx/include/__chrono/file_clock.h
@@ -27,7 +27,7 @@
 _LIBCPP_END_NAMESPACE_FILESYSTEM
 #endif // !_LIBCPP_CXX03_LANG
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -44,7 +44,7 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #ifndef _LIBCPP_CXX03_LANG
 _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
@@ -65,7 +65,7 @@
 
   _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_FUNC_VIS static time_point now() noexcept;
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
   template <class _Duration>
   _LIBCPP_HIDE_FROM_ABI
   static chrono::sys_time<_Duration> to_sys(const chrono::file_time<_Duration>& __t) {
@@ -77,7 +77,7 @@
   static chrono::file_time<_Duration> from_sys(const chrono::sys_time<_Duration>& __t) {
     return chrono::file_time<_Duration>(__t.time_since_epoch());
   }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 };
 _LIBCPP_END_NAMESPACE_FILESYSTEM
 #endif // !_LIBCPP_CXX03_LANG
diff --git a/libcxx/include/__chrono/formatter.h b/libcxx/include/__chrono/formatter.h
--- a/libcxx/include/__chrono/formatter.h
+++ b/libcxx/include/__chrono/formatter.h
@@ -51,7 +51,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_FORMAT)
+#if _LIBCPP_STD_VER >= 20 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_FORMAT)
 
 namespace __formatter {
 
@@ -771,7 +771,7 @@
     return _Base::__parse(__parse_ctx, __format_spec::__fields_chrono, __format_spec::__flags::__time);
   }
 };
-#endif // if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_FORMAT)
+#endif // if _LIBCPP_STD_VER >= 20 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_FORMAT)
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__chrono/hh_mm_ss.h b/libcxx/include/__chrono/hh_mm_ss.h
--- a/libcxx/include/__chrono/hh_mm_ss.h
+++ b/libcxx/include/__chrono/hh_mm_ss.h
@@ -20,7 +20,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -108,6 +108,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___CHRONO_HH_MM_SS_H
diff --git a/libcxx/include/__chrono/literals.h b/libcxx/include/__chrono/literals.h
--- a/libcxx/include/__chrono/literals.h
+++ b/libcxx/include/__chrono/literals.h
@@ -18,7 +18,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -44,6 +44,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___CHRONO_LITERALS_H
diff --git a/libcxx/include/__chrono/month.h b/libcxx/include/__chrono/month.h
--- a/libcxx/include/__chrono/month.h
+++ b/libcxx/include/__chrono/month.h
@@ -18,7 +18,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -98,6 +98,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___CHRONO_MONTH_H
diff --git a/libcxx/include/__chrono/month_weekday.h b/libcxx/include/__chrono/month_weekday.h
--- a/libcxx/include/__chrono/month_weekday.h
+++ b/libcxx/include/__chrono/month_weekday.h
@@ -18,7 +18,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -101,6 +101,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___CHRONO_MONTH_WEEKDAY_H
diff --git a/libcxx/include/__chrono/monthday.h b/libcxx/include/__chrono/monthday.h
--- a/libcxx/include/__chrono/monthday.h
+++ b/libcxx/include/__chrono/monthday.h
@@ -20,7 +20,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -124,6 +124,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___CHRONO_MONTHDAY_H
diff --git a/libcxx/include/__chrono/ostream.h b/libcxx/include/__chrono/ostream.h
--- a/libcxx/include/__chrono/ostream.h
+++ b/libcxx/include/__chrono/ostream.h
@@ -34,7 +34,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_FORMAT)
+#if _LIBCPP_STD_VER >= 20 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_FORMAT)
 
 namespace chrono {
 
@@ -238,7 +238,7 @@
 
 } // namespace chrono
 
-#endif //if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_FORMAT)
+#endif //if _LIBCPP_STD_VER >= 20 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_FORMAT)
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__chrono/parser_std_format_spec.h b/libcxx/include/__chrono/parser_std_format_spec.h
--- a/libcxx/include/__chrono/parser_std_format_spec.h
+++ b/libcxx/include/__chrono/parser_std_format_spec.h
@@ -24,7 +24,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_FORMAT)
+#if _LIBCPP_STD_VER >= 20 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_FORMAT)
 
 namespace __format_spec {
 
@@ -409,7 +409,7 @@
 
 } // namespace __format_spec
 
-#endif //_LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_FORMAT)
+#endif //_LIBCPP_STD_VER >= 20 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_FORMAT)
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__chrono/statically_widen.h b/libcxx/include/__chrono/statically_widen.h
--- a/libcxx/include/__chrono/statically_widen.h
+++ b/libcxx/include/__chrono/statically_widen.h
@@ -22,7 +22,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 #  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
 template <__fmt_char_type _CharT>
@@ -45,7 +45,7 @@
 #    define _LIBCPP_STATICALLY_WIDEN(_CharT, __str) ::std::__statically_widen<_CharT>(__str)
 #  endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS
 
-#endif   //_LIBCPP_STD_VER > 17
+#endif   //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__chrono/system_clock.h b/libcxx/include/__chrono/system_clock.h
--- a/libcxx/include/__chrono/system_clock.h
+++ b/libcxx/include/__chrono/system_clock.h
@@ -38,7 +38,7 @@
     static time_point from_time_t(time_t __t) _NOEXCEPT;
 };
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class _Duration>
 using sys_time    = time_point<system_clock, _Duration>;
diff --git a/libcxx/include/__chrono/time_point.h b/libcxx/include/__chrono/time_point.h
--- a/libcxx/include/__chrono/time_point.h
+++ b/libcxx/include/__chrono/time_point.h
@@ -90,7 +90,7 @@
     return time_point<_Clock, _ToDuration>(chrono::duration_cast<_ToDuration>(__t.time_since_epoch()));
 }
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _ToDuration, class _Clock, class _Duration>
 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
 typename enable_if
@@ -138,7 +138,7 @@
 {
     return __d >= __d.zero() ? +__d : -__d;
 }
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 // time_point ==
 
diff --git a/libcxx/include/__chrono/weekday.h b/libcxx/include/__chrono/weekday.h
--- a/libcxx/include/__chrono/weekday.h
+++ b/libcxx/include/__chrono/weekday.h
@@ -20,7 +20,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -180,6 +180,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___CHRONO_WEEKDAY_H
diff --git a/libcxx/include/__chrono/year.h b/libcxx/include/__chrono/year.h
--- a/libcxx/include/__chrono/year.h
+++ b/libcxx/include/__chrono/year.h
@@ -22,7 +22,7 @@
 _LIBCPP_PUSH_MACROS
 #include <__undef_macros>
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -95,7 +95,7 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_POP_MACROS
 
diff --git a/libcxx/include/__chrono/year_month.h b/libcxx/include/__chrono/year_month.h
--- a/libcxx/include/__chrono/year_month.h
+++ b/libcxx/include/__chrono/year_month.h
@@ -20,7 +20,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -96,6 +96,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___CHRONO_YEAR_MONTH_H
diff --git a/libcxx/include/__chrono/year_month_day.h b/libcxx/include/__chrono/year_month_day.h
--- a/libcxx/include/__chrono/year_month_day.h
+++ b/libcxx/include/__chrono/year_month_day.h
@@ -27,7 +27,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -302,6 +302,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___CHRONO_YEAR_MONTH_DAY_H
diff --git a/libcxx/include/__chrono/year_month_weekday.h b/libcxx/include/__chrono/year_month_weekday.h
--- a/libcxx/include/__chrono/year_month_weekday.h
+++ b/libcxx/include/__chrono/year_month_weekday.h
@@ -27,7 +27,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -250,6 +250,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___CHRONO_YEAR_MONTH_WEEKDAY_H
diff --git a/libcxx/include/__compare/common_comparison_category.h b/libcxx/include/__compare/common_comparison_category.h
--- a/libcxx/include/__compare/common_comparison_category.h
+++ b/libcxx/include/__compare/common_comparison_category.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace __comp_detail {
 
@@ -88,7 +88,7 @@
 template<class... _Ts>
 using common_comparison_category_t = typename common_comparison_category<_Ts...>::type;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__compare/compare_partial_order_fallback.h b/libcxx/include/__compare/compare_partial_order_fallback.h
--- a/libcxx/include/__compare/compare_partial_order_fallback.h
+++ b/libcxx/include/__compare/compare_partial_order_fallback.h
@@ -23,7 +23,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [cmp.alg]
 namespace __compare_partial_order_fallback {
@@ -67,7 +67,7 @@
     inline constexpr auto compare_partial_order_fallback = __compare_partial_order_fallback::__fn{};
 } // namespace __cpo
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__compare/compare_strong_order_fallback.h b/libcxx/include/__compare/compare_strong_order_fallback.h
--- a/libcxx/include/__compare/compare_strong_order_fallback.h
+++ b/libcxx/include/__compare/compare_strong_order_fallback.h
@@ -23,7 +23,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [cmp.alg]
 namespace __compare_strong_order_fallback {
@@ -64,7 +64,7 @@
     inline constexpr auto compare_strong_order_fallback = __compare_strong_order_fallback::__fn{};
 } // namespace __cpo
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__compare/compare_three_way.h b/libcxx/include/__compare/compare_three_way.h
--- a/libcxx/include/__compare/compare_three_way.h
+++ b/libcxx/include/__compare/compare_three_way.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 struct _LIBCPP_TEMPLATE_VIS compare_three_way
 {
@@ -34,7 +34,7 @@
     using is_transparent = void;
 };
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__compare/compare_three_way_result.h b/libcxx/include/__compare/compare_three_way_result.h
--- a/libcxx/include/__compare/compare_three_way_result.h
+++ b/libcxx/include/__compare/compare_three_way_result.h
@@ -19,7 +19,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template<class, class, class>
 struct _LIBCPP_HIDE_FROM_ABI __compare_three_way_result { };
@@ -37,7 +37,7 @@
 template<class _Tp, class _Up = _Tp>
 using compare_three_way_result_t = typename compare_three_way_result<_Tp, _Up>::type;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__compare/compare_weak_order_fallback.h b/libcxx/include/__compare/compare_weak_order_fallback.h
--- a/libcxx/include/__compare/compare_weak_order_fallback.h
+++ b/libcxx/include/__compare/compare_weak_order_fallback.h
@@ -23,7 +23,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [cmp.alg]
 namespace __compare_weak_order_fallback {
@@ -64,7 +64,7 @@
     inline constexpr auto compare_weak_order_fallback = __compare_weak_order_fallback::__fn{};
 } // namespace __cpo
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__compare/is_eq.h b/libcxx/include/__compare/is_eq.h
--- a/libcxx/include/__compare/is_eq.h
+++ b/libcxx/include/__compare/is_eq.h
@@ -18,7 +18,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_HIDE_FROM_ABI inline constexpr bool is_eq(partial_ordering __c) noexcept { return __c == 0; }
 _LIBCPP_HIDE_FROM_ABI inline constexpr bool is_neq(partial_ordering __c) noexcept { return __c != 0; }
@@ -27,7 +27,7 @@
 _LIBCPP_HIDE_FROM_ABI inline constexpr bool is_gt(partial_ordering __c) noexcept { return __c > 0; }
 _LIBCPP_HIDE_FROM_ABI inline constexpr bool is_gteq(partial_ordering __c) noexcept { return __c >= 0; }
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__compare/ordering.h b/libcxx/include/__compare/ordering.h
--- a/libcxx/include/__compare/ordering.h
+++ b/libcxx/include/__compare/ordering.h
@@ -19,7 +19,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // exposition only
 enum class _LIBCPP_ENUM_VIS _OrdResult : signed char {
@@ -319,7 +319,7 @@
 template <class _Tp>
 concept __comparison_category = __one_of_v<_Tp, partial_ordering, weak_ordering, strong_ordering>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__compare/partial_order.h b/libcxx/include/__compare/partial_order.h
--- a/libcxx/include/__compare/partial_order.h
+++ b/libcxx/include/__compare/partial_order.h
@@ -24,7 +24,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [cmp.alg]
 namespace __partial_order {
@@ -67,7 +67,7 @@
     inline constexpr auto partial_order = __partial_order::__fn{};
 } // namespace __cpo
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__compare/strong_order.h b/libcxx/include/__compare/strong_order.h
--- a/libcxx/include/__compare/strong_order.h
+++ b/libcxx/include/__compare/strong_order.h
@@ -30,7 +30,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [cmp.alg]
 namespace __strong_order {
@@ -130,7 +130,7 @@
     inline constexpr auto strong_order = __strong_order::__fn{};
 } // namespace __cpo
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__compare/synth_three_way.h b/libcxx/include/__compare/synth_three_way.h
--- a/libcxx/include/__compare/synth_three_way.h
+++ b/libcxx/include/__compare/synth_three_way.h
@@ -21,7 +21,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [expos.only.func]
 
@@ -44,7 +44,7 @@
 template <class _Tp, class _Up = _Tp>
 using __synth_three_way_result = decltype(std::__synth_three_way(std::declval<_Tp&>(), std::declval<_Up&>()));
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__compare/three_way_comparable.h b/libcxx/include/__compare/three_way_comparable.h
--- a/libcxx/include/__compare/three_way_comparable.h
+++ b/libcxx/include/__compare/three_way_comparable.h
@@ -25,7 +25,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template<class _Tp, class _Cat>
 concept __compares_as =
@@ -52,7 +52,7 @@
     { __u <=> __t } -> __compares_as<_Cat>;
   };
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__compare/weak_order.h b/libcxx/include/__compare/weak_order.h
--- a/libcxx/include/__compare/weak_order.h
+++ b/libcxx/include/__compare/weak_order.h
@@ -24,7 +24,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [cmp.alg]
 namespace __weak_order {
@@ -95,7 +95,7 @@
     inline constexpr auto weak_order = __weak_order::__fn{};
 } // namespace __cpo
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/arithmetic.h b/libcxx/include/__concepts/arithmetic.h
--- a/libcxx/include/__concepts/arithmetic.h
+++ b/libcxx/include/__concepts/arithmetic.h
@@ -22,7 +22,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [concepts.arithmetic], arithmetic concepts
 
@@ -45,7 +45,7 @@
 template <class _Tp>
 concept __libcpp_signed_integer = __libcpp_is_signed_integer<_Tp>::value;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/assignable.h b/libcxx/include/__concepts/assignable.h
--- a/libcxx/include/__concepts/assignable.h
+++ b/libcxx/include/__concepts/assignable.h
@@ -22,7 +22,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [concept.assignable]
 
@@ -34,7 +34,7 @@
     { __lhs = _VSTD::forward<_Rhs>(__rhs) } -> same_as<_Lhs>;
   };
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/boolean_testable.h b/libcxx/include/__concepts/boolean_testable.h
--- a/libcxx/include/__concepts/boolean_testable.h
+++ b/libcxx/include/__concepts/boolean_testable.h
@@ -19,7 +19,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [concepts.booleantestable]
 
@@ -31,7 +31,7 @@
   { !_VSTD::forward<_Tp>(__t) } -> __boolean_testable_impl;
 };
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/class_or_enum.h b/libcxx/include/__concepts/class_or_enum.h
--- a/libcxx/include/__concepts/class_or_enum.h
+++ b/libcxx/include/__concepts/class_or_enum.h
@@ -21,7 +21,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // Whether a type is a class type or enumeration type according to the Core wording.
 
@@ -33,7 +33,7 @@
 template<class _Tp>
 concept __workaround_52970 = is_class_v<__remove_cvref_t<_Tp>> || is_union_v<__remove_cvref_t<_Tp>>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/common_reference_with.h b/libcxx/include/__concepts/common_reference_with.h
--- a/libcxx/include/__concepts/common_reference_with.h
+++ b/libcxx/include/__concepts/common_reference_with.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [concept.commonref]
 
@@ -30,7 +30,7 @@
   convertible_to<_Tp, common_reference_t<_Tp, _Up>> &&
   convertible_to<_Up, common_reference_t<_Tp, _Up>>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/common_with.h b/libcxx/include/__concepts/common_with.h
--- a/libcxx/include/__concepts/common_with.h
+++ b/libcxx/include/__concepts/common_with.h
@@ -23,7 +23,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [concept.common]
 
@@ -43,7 +43,7 @@
       add_lvalue_reference_t<const _Tp>,
       add_lvalue_reference_t<const _Up>>>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/constructible.h b/libcxx/include/__concepts/constructible.h
--- a/libcxx/include/__concepts/constructible.h
+++ b/libcxx/include/__concepts/constructible.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [concept.constructible]
 template<class _Tp, class... _Args>
@@ -49,7 +49,7 @@
   constructible_from<_Tp, const _Tp&> && convertible_to<const _Tp&, _Tp> &&
   constructible_from<_Tp, const _Tp> && convertible_to<const _Tp, _Tp>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/convertible_to.h b/libcxx/include/__concepts/convertible_to.h
--- a/libcxx/include/__concepts/convertible_to.h
+++ b/libcxx/include/__concepts/convertible_to.h
@@ -19,7 +19,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [concept.convertible]
 
@@ -30,7 +30,7 @@
     static_cast<_To>(std::declval<_From>());
   };
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/copyable.h b/libcxx/include/__concepts/copyable.h
--- a/libcxx/include/__concepts/copyable.h
+++ b/libcxx/include/__concepts/copyable.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [concepts.object]
 
@@ -32,7 +32,7 @@
   assignable_from<_Tp&, const _Tp&> &&
   assignable_from<_Tp&, const _Tp>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/derived_from.h b/libcxx/include/__concepts/derived_from.h
--- a/libcxx/include/__concepts/derived_from.h
+++ b/libcxx/include/__concepts/derived_from.h
@@ -19,7 +19,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [concept.derived]
 
@@ -28,7 +28,7 @@
   is_base_of_v<_Bp, _Dp> &&
   is_convertible_v<const volatile _Dp*, const volatile _Bp*>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/destructible.h b/libcxx/include/__concepts/destructible.h
--- a/libcxx/include/__concepts/destructible.h
+++ b/libcxx/include/__concepts/destructible.h
@@ -18,14 +18,14 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [concept.destructible]
 
 template<class _Tp>
 concept destructible = is_nothrow_destructible_v<_Tp>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/different_from.h b/libcxx/include/__concepts/different_from.h
--- a/libcxx/include/__concepts/different_from.h
+++ b/libcxx/include/__concepts/different_from.h
@@ -19,12 +19,12 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template<class _Tp, class _Up>
 concept __different_from = !same_as<remove_cvref_t<_Tp>, remove_cvref_t<_Up>>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/equality_comparable.h b/libcxx/include/__concepts/equality_comparable.h
--- a/libcxx/include/__concepts/equality_comparable.h
+++ b/libcxx/include/__concepts/equality_comparable.h
@@ -21,7 +21,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [concept.equalitycomparable]
 
@@ -47,7 +47,7 @@
       __make_const_lvalue_ref<_Up>>> &&
   __weakly_equality_comparable_with<_Tp, _Up>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/invocable.h b/libcxx/include/__concepts/invocable.h
--- a/libcxx/include/__concepts/invocable.h
+++ b/libcxx/include/__concepts/invocable.h
@@ -19,7 +19,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [concept.invocable]
 
@@ -33,7 +33,7 @@
 template<class _Fn, class... _Args>
 concept regular_invocable = invocable<_Fn, _Args...>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/movable.h b/libcxx/include/__concepts/movable.h
--- a/libcxx/include/__concepts/movable.h
+++ b/libcxx/include/__concepts/movable.h
@@ -21,7 +21,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [concepts.object]
 
@@ -32,7 +32,7 @@
   assignable_from<_Tp&, _Tp> &&
   swappable<_Tp>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/predicate.h b/libcxx/include/__concepts/predicate.h
--- a/libcxx/include/__concepts/predicate.h
+++ b/libcxx/include/__concepts/predicate.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [concept.predicate]
 
@@ -28,7 +28,7 @@
 concept predicate =
   regular_invocable<_Fn, _Args...> && __boolean_testable<invoke_result_t<_Fn, _Args...>>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/regular.h b/libcxx/include/__concepts/regular.h
--- a/libcxx/include/__concepts/regular.h
+++ b/libcxx/include/__concepts/regular.h
@@ -19,14 +19,14 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [concept.object]
 
 template<class _Tp>
 concept regular = semiregular<_Tp> && equality_comparable<_Tp>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/relation.h b/libcxx/include/__concepts/relation.h
--- a/libcxx/include/__concepts/relation.h
+++ b/libcxx/include/__concepts/relation.h
@@ -18,7 +18,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [concept.relation]
 
@@ -37,7 +37,7 @@
 template<class _Rp, class _Tp, class _Up>
 concept strict_weak_order = relation<_Rp, _Tp, _Up>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/same_as.h b/libcxx/include/__concepts/same_as.h
--- a/libcxx/include/__concepts/same_as.h
+++ b/libcxx/include/__concepts/same_as.h
@@ -18,7 +18,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [concept.same]
 
@@ -28,7 +28,7 @@
 template<class _Tp, class _Up>
 concept same_as = __same_as_impl<_Tp, _Up> && __same_as_impl<_Up, _Tp>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/semiregular.h b/libcxx/include/__concepts/semiregular.h
--- a/libcxx/include/__concepts/semiregular.h
+++ b/libcxx/include/__concepts/semiregular.h
@@ -19,14 +19,14 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [concept.object]
 
 template<class _Tp>
 concept semiregular = copyable<_Tp> && default_initializable<_Tp>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/swappable.h b/libcxx/include/__concepts/swappable.h
--- a/libcxx/include/__concepts/swappable.h
+++ b/libcxx/include/__concepts/swappable.h
@@ -30,7 +30,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [concept.swappable]
 
@@ -114,7 +114,7 @@
     ranges::swap(_VSTD::forward<_Up>(__u), _VSTD::forward<_Tp>(__t));
   };
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__concepts/totally_ordered.h b/libcxx/include/__concepts/totally_ordered.h
--- a/libcxx/include/__concepts/totally_ordered.h
+++ b/libcxx/include/__concepts/totally_ordered.h
@@ -21,7 +21,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [concept.totallyordered]
 
@@ -51,7 +51,7 @@
       __make_const_lvalue_ref<_Up>>> &&
   __partially_ordered_with<_Tp, _Up>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__config b/libcxx/include/__config
--- a/libcxx/include/__config
+++ b/libcxx/include/__config
@@ -665,7 +665,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD
 
-#  if _LIBCPP_STD_VER > 14
+#  if _LIBCPP_STD_VER >= 17
 #    define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM                                                                         \
        _LIBCPP_BEGIN_NAMESPACE_STD inline namespace __fs { namespace filesystem {
 #  else
@@ -779,7 +779,7 @@
 #    if __has_attribute(__deprecated__)
 #      define _LIBCPP_DEPRECATED __attribute__((__deprecated__))
 #      define _LIBCPP_DEPRECATED_(m) __attribute__((__deprecated__(m)))
-#    elif _LIBCPP_STD_VER > 11
+#    elif _LIBCPP_STD_VER >= 14
 #      define _LIBCPP_DEPRECATED [[deprecated]]
 #      define _LIBCPP_DEPRECATED_(m) [[deprecated(m)]]
 #    else
@@ -797,19 +797,19 @@
 #    define _LIBCPP_DEPRECATED_IN_CXX11
 #  endif
 
-#  if _LIBCPP_STD_VER > 11
+#  if _LIBCPP_STD_VER >= 14
 #    define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED
 #  else
 #    define _LIBCPP_DEPRECATED_IN_CXX14
 #  endif
 
-#  if _LIBCPP_STD_VER > 14
+#  if _LIBCPP_STD_VER >= 17
 #    define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED
 #  else
 #    define _LIBCPP_DEPRECATED_IN_CXX17
 #  endif
 
-#  if _LIBCPP_STD_VER > 17
+#  if _LIBCPP_STD_VER >= 20
 #    define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED
 #  else
 #    define _LIBCPP_DEPRECATED_IN_CXX20
@@ -844,25 +844,25 @@
 #    define _LIBCPP_EXPLICIT_SINCE_CXX14 explicit
 #  endif
 
-#  if _LIBCPP_STD_VER > 11
+#  if _LIBCPP_STD_VER >= 14
 #    define _LIBCPP_CONSTEXPR_SINCE_CXX14 constexpr
 #  else
 #    define _LIBCPP_CONSTEXPR_SINCE_CXX14
 #  endif
 
-#  if _LIBCPP_STD_VER > 14
+#  if _LIBCPP_STD_VER >= 17
 #    define _LIBCPP_CONSTEXPR_SINCE_CXX17 constexpr
 #  else
 #    define _LIBCPP_CONSTEXPR_SINCE_CXX17
 #  endif
 
-#  if _LIBCPP_STD_VER > 17
+#  if _LIBCPP_STD_VER >= 20
 #    define _LIBCPP_CONSTEXPR_SINCE_CXX20 constexpr
 #  else
 #    define _LIBCPP_CONSTEXPR_SINCE_CXX20
 #  endif
 
-#  if _LIBCPP_STD_VER > 20
+#  if _LIBCPP_STD_VER >= 23
 #    define _LIBCPP_CONSTEXPR_SINCE_CXX23 constexpr
 #  else
 #    define _LIBCPP_CONSTEXPR_SINCE_CXX23
@@ -885,7 +885,7 @@
 #    define _LIBCPP_NODISCARD_EXT
 #  endif
 
-#  if _LIBCPP_STD_VER > 17 || !defined(_LIBCPP_DISABLE_NODISCARD_EXT)
+#  if _LIBCPP_STD_VER >= 20 || !defined(_LIBCPP_DISABLE_NODISCARD_EXT)
 #    define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD
 #  else
 #    define _LIBCPP_NODISCARD_AFTER_CXX17
@@ -1051,7 +1051,7 @@
 #    define _LIBCPP_THREAD_SAFETY_ANNOTATION(x)
 #  endif
 
-#  if _LIBCPP_STD_VER > 17
+#  if _LIBCPP_STD_VER >= 20
 #    define _LIBCPP_CONSTINIT constinit
 #  elif __has_attribute(__require_constant_initialization__)
 #    define _LIBCPP_CONSTINIT __attribute__((__require_constant_initialization__))
diff --git a/libcxx/include/__coroutine/coroutine_handle.h b/libcxx/include/__coroutine/coroutine_handle.h
--- a/libcxx/include/__coroutine/coroutine_handle.h
+++ b/libcxx/include/__coroutine/coroutine_handle.h
@@ -21,7 +21,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -198,6 +198,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // __LIBCPP_STD_VER > 17
+#endif // __LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___COROUTINE_COROUTINE_HANDLE_H
diff --git a/libcxx/include/__coroutine/coroutine_traits.h b/libcxx/include/__coroutine/coroutine_traits.h
--- a/libcxx/include/__coroutine/coroutine_traits.h
+++ b/libcxx/include/__coroutine/coroutine_traits.h
@@ -16,7 +16,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -48,6 +48,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // __LIBCPP_STD_VER > 17
+#endif // __LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___COROUTINE_COROUTINE_TRAITS_H
diff --git a/libcxx/include/__coroutine/noop_coroutine_handle.h b/libcxx/include/__coroutine/noop_coroutine_handle.h
--- a/libcxx/include/__coroutine/noop_coroutine_handle.h
+++ b/libcxx/include/__coroutine/noop_coroutine_handle.h
@@ -16,7 +16,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -107,6 +107,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // __LIBCPP_STD_VER > 17
+#endif // __LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP___COROUTINE_NOOP_COROUTINE_HANDLE_H
diff --git a/libcxx/include/__coroutine/trivial_awaitables.h b/libcxx/include/__coroutine/trivial_awaitables.h
--- a/libcxx/include/__coroutine/trivial_awaitables.h
+++ b/libcxx/include/__coroutine/trivial_awaitables.h
@@ -16,7 +16,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -41,6 +41,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // __LIBCPP_STD_VER > 17
+#endif // __LIBCPP_STD_VER >= 20
 
 #endif // __LIBCPP___COROUTINE_TRIVIAL_AWAITABLES_H
diff --git a/libcxx/include/__filesystem/directory_iterator.h b/libcxx/include/__filesystem/directory_iterator.h
--- a/libcxx/include/__filesystem/directory_iterator.h
+++ b/libcxx/include/__filesystem/directory_iterator.h
@@ -148,7 +148,7 @@
 
 _LIBCPP_END_NAMESPACE_FILESYSTEM
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <>
 _LIBCPP_AVAILABILITY_FILESYSTEM
@@ -158,7 +158,7 @@
 _LIBCPP_AVAILABILITY_FILESYSTEM
 inline constexpr bool _VSTD::ranges::enable_view<_VSTD_FS::directory_iterator> = true;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP_CXX03_LANG
 
diff --git a/libcxx/include/__filesystem/recursive_directory_iterator.h b/libcxx/include/__filesystem/recursive_directory_iterator.h
--- a/libcxx/include/__filesystem/recursive_directory_iterator.h
+++ b/libcxx/include/__filesystem/recursive_directory_iterator.h
@@ -168,7 +168,7 @@
 
 _LIBCPP_END_NAMESPACE_FILESYSTEM
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <>
 _LIBCPP_AVAILABILITY_FILESYSTEM
@@ -178,7 +178,7 @@
 _LIBCPP_AVAILABILITY_FILESYSTEM
 inline constexpr bool _VSTD::ranges::enable_view<_VSTD_FS::recursive_directory_iterator> = true;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #endif // _LIBCPP_CXX03_LANG
 
diff --git a/libcxx/include/__filesystem/space_info.h b/libcxx/include/__filesystem/space_info.h
--- a/libcxx/include/__filesystem/space_info.h
+++ b/libcxx/include/__filesystem/space_info.h
@@ -29,7 +29,7 @@
   uintmax_t free;
   uintmax_t available;
 
-#  if _LIBCPP_STD_VER > 17
+#  if _LIBCPP_STD_VER >= 20
   friend _LIBCPP_HIDE_FROM_ABI bool operator==(const space_info&, const space_info&) = default;
 #  endif
 };
diff --git a/libcxx/include/__format/buffer.h b/libcxx/include/__format/buffer.h
--- a/libcxx/include/__format/buffer.h
+++ b/libcxx/include/__format/buffer.h
@@ -42,7 +42,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace __format {
 
@@ -564,7 +564,7 @@
 
 } // namespace __format
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/concepts.h b/libcxx/include/__format/concepts.h
--- a/libcxx/include/__format/concepts.h
+++ b/libcxx/include/__format/concepts.h
@@ -26,7 +26,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 /// The character type specializations of \ref formatter.
 template <class _CharT>
@@ -56,7 +56,7 @@
       { __cf.format(__t, __fc) } -> same_as<__fmt_iter_for<_CharT>>;
     };
 
-#  if _LIBCPP_STD_VER > 20
+#  if _LIBCPP_STD_VER >= 23
 template <class _Tp, class _CharT>
 concept formattable = __formattable<_Tp, _CharT>;
 
@@ -70,8 +70,8 @@
                           // Use a requires since tuple_size_v may fail to instantiate,
                           (__is_specialization_v<_Tp, tuple> && requires { tuple_size_v<_Tp> == 2; });
 
-#  endif //_LIBCPP_STD_VER > 20
-#endif //_LIBCPP_STD_VER > 17
+#  endif //_LIBCPP_STD_VER >= 23
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/container_adaptor.h b/libcxx/include/__format/container_adaptor.h
--- a/libcxx/include/__format/container_adaptor.h
+++ b/libcxx/include/__format/container_adaptor.h
@@ -24,7 +24,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
 
 // [container.adaptors.format] only specifies the library should provide the
 // formatter specializations, not which header should provide them.
@@ -63,7 +63,7 @@
 struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter<stack<_Tp, _Container>, _CharT>
     : public __formatter_container_adaptor<stack<_Tp, _Container>, _CharT> {};
 
-#endif //_LIBCPP_STD_VER > 20
+#endif //_LIBCPP_STD_VER >= 23
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/enable_insertable.h b/libcxx/include/__format/enable_insertable.h
--- a/libcxx/include/__format/enable_insertable.h
+++ b/libcxx/include/__format/enable_insertable.h
@@ -18,7 +18,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace __format {
 
@@ -28,7 +28,7 @@
 
 } // namespace __format
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/escaped_output_table.h b/libcxx/include/__format/escaped_output_table.h
--- a/libcxx/include/__format/escaped_output_table.h
+++ b/libcxx/include/__format/escaped_output_table.h
@@ -72,7 +72,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
 
 namespace __escaped_output_table {
 
@@ -1031,7 +1031,7 @@
 
 } // namespace __escaped_output_table
 
-#endif //_LIBCPP_STD_VER > 20
+#endif //_LIBCPP_STD_VER >= 23
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/extended_grapheme_cluster_table.h b/libcxx/include/__format/extended_grapheme_cluster_table.h
--- a/libcxx/include/__format/extended_grapheme_cluster_table.h
+++ b/libcxx/include/__format/extended_grapheme_cluster_table.h
@@ -73,7 +73,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace __extended_grapheme_custer_property_boundary {
 
@@ -1654,7 +1654,7 @@
 
 } // namespace __extended_grapheme_custer_property_boundary
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/format_arg.h b/libcxx/include/__format/format_arg.h
--- a/libcxx/include/__format/format_arg.h
+++ b/libcxx/include/__format/format_arg.h
@@ -30,7 +30,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace __format {
 /// The type stored in @ref basic_format_arg.
@@ -295,7 +295,7 @@
   }
 }
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/format_arg_store.h b/libcxx/include/__format/format_arg_store.h
--- a/libcxx/include/__format/format_arg_store.h
+++ b/libcxx/include/__format/format_arg_store.h
@@ -27,7 +27,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace __format {
 
@@ -247,7 +247,7 @@
   _Storage __storage;
 };
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/format_args.h b/libcxx/include/__format/format_args.h
--- a/libcxx/include/__format/format_args.h
+++ b/libcxx/include/__format/format_args.h
@@ -24,7 +24,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class _Context>
 class _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT basic_format_args {
@@ -73,7 +73,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(basic_format_args);
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/format_context.h b/libcxx/include/__format/format_context.h
--- a/libcxx/include/__format/format_context.h
+++ b/libcxx/include/__format/format_context.h
@@ -37,7 +37,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class _OutIt, class _CharT>
 requires output_iterator<_OutIt, const _CharT&>
@@ -216,7 +216,7 @@
 };
 
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(basic_format_context);
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/format_error.h b/libcxx/include/__format/format_error.h
--- a/libcxx/include/__format/format_error.h
+++ b/libcxx/include/__format/format_error.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 class _LIBCPP_EXCEPTION_ABI format_error : public runtime_error {
 public:
@@ -48,7 +48,7 @@
 #endif
 }
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/format_functions.h b/libcxx/include/__format/format_functions.h
--- a/libcxx/include/__format/format_functions.h
+++ b/libcxx/include/__format/format_functions.h
@@ -56,7 +56,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // TODO FMT Evaluate which templates should be external templates. This
 // improves the efficiency of the header. However since the header is still
@@ -657,7 +657,7 @@
 #endif // _LIBCPP_HAS_NO_LOCALIZATION
 
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/format_fwd.h b/libcxx/include/__format/format_fwd.h
--- a/libcxx/include/__format/format_fwd.h
+++ b/libcxx/include/__format/format_fwd.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class _Context>
 class _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT basic_format_arg;
@@ -32,7 +32,7 @@
 template <class _Tp, class _CharT = char>
 struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter;
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/format_parse_context.h b/libcxx/include/__format/format_parse_context.h
--- a/libcxx/include/__format/format_parse_context.h
+++ b/libcxx/include/__format/format_parse_context.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class _CharT>
 class _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT basic_format_parse_context {
@@ -93,7 +93,7 @@
 using wformat_parse_context = basic_format_parse_context<wchar_t>;
 #endif
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/format_string.h b/libcxx/include/__format/format_string.h
--- a/libcxx/include/__format/format_string.h
+++ b/libcxx/include/__format/format_string.h
@@ -24,7 +24,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace __format {
 
@@ -160,7 +160,7 @@
 
 } // namespace __format
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/format_to_n_result.h b/libcxx/include/__format/format_to_n_result.h
--- a/libcxx/include/__format/format_to_n_result.h
+++ b/libcxx/include/__format/format_to_n_result.h
@@ -19,7 +19,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class _OutIt>
 struct _LIBCPP_TEMPLATE_VIS format_to_n_result {
@@ -28,7 +28,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(format_to_n_result);
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/formatter.h b/libcxx/include/__format/formatter.h
--- a/libcxx/include/__format/formatter.h
+++ b/libcxx/include/__format/formatter.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 /// The default formatter template.
 ///
@@ -38,7 +38,7 @@
   formatter& operator=(const formatter&) = delete;
 };
 
-#  if _LIBCPP_STD_VER > 20
+#  if _LIBCPP_STD_VER >= 23
 
 template <class _Tp>
 _LIBCPP_HIDE_FROM_ABI constexpr void __set_debug_format(_Tp& __formatter) {
@@ -46,8 +46,8 @@
     __formatter.set_debug_format();
 }
 
-#  endif // _LIBCPP_STD_VER > 20
-#endif   // _LIBCPP_STD_VER > 17
+#  endif // _LIBCPP_STD_VER >= 23
+#endif   // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/formatter_bool.h b/libcxx/include/__format/formatter_bool.h
--- a/libcxx/include/__format/formatter_bool.h
+++ b/libcxx/include/__format/formatter_bool.h
@@ -33,7 +33,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <__fmt_char_type _CharT>
 struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter<bool, _CharT> {
@@ -71,7 +71,7 @@
   __format_spec::__parser<_CharT> __parser_;
 };
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/formatter_char.h b/libcxx/include/__format/formatter_char.h
--- a/libcxx/include/__format/formatter_char.h
+++ b/libcxx/include/__format/formatter_char.h
@@ -28,7 +28,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <__fmt_char_type _CharT>
 struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT __formatter_char {
@@ -44,7 +44,7 @@
     if (__parser_.__type_ == __format_spec::__type::__default || __parser_.__type_ == __format_spec::__type::__char)
       return __formatter::__format_char(__value, __ctx.out(), __parser_.__get_parsed_std_specifications(__ctx));
 
-#  if _LIBCPP_STD_VER > 20
+#  if _LIBCPP_STD_VER >= 23
     if (__parser_.__type_ == __format_spec::__type::__debug)
       return __formatter::__format_escaped_char(__value, __ctx.out(), __parser_.__get_parsed_std_specifications(__ctx));
 #  endif
@@ -66,7 +66,7 @@
     return format(static_cast<wchar_t>(__value), __ctx);
   }
 
-#  if _LIBCPP_STD_VER > 20
+#  if _LIBCPP_STD_VER >= 23
   _LIBCPP_HIDE_FROM_ABI constexpr void set_debug_format() { __parser_.__type_ = __format_spec::__type::__debug; }
 #  endif
 
@@ -86,7 +86,7 @@
 
 #  endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/formatter_floating_point.h b/libcxx/include/__format/formatter_floating_point.h
--- a/libcxx/include/__format/formatter_floating_point.h
+++ b/libcxx/include/__format/formatter_floating_point.h
@@ -43,7 +43,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace __formatter {
 
@@ -748,7 +748,7 @@
 struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter<long double, _CharT>
     : public __formatter_floating_point<_CharT> {};
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/formatter_integer.h b/libcxx/include/__format/formatter_integer.h
--- a/libcxx/include/__format/formatter_integer.h
+++ b/libcxx/include/__format/formatter_integer.h
@@ -28,7 +28,7 @@
 
     _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
     template <__fmt_char_type _CharT>
     struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT __formatter_integer {
@@ -100,7 +100,7 @@
     : public __formatter_integer<_CharT> {};
 #  endif
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/formatter_integral.h b/libcxx/include/__format/formatter_integral.h
--- a/libcxx/include/__format/formatter_integral.h
+++ b/libcxx/include/__format/formatter_integral.h
@@ -36,7 +36,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace __formatter {
 
@@ -354,7 +354,7 @@
 
 } // namespace __formatter
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/formatter_output.h b/libcxx/include/__format/formatter_output.h
--- a/libcxx/include/__format/formatter_output.h
+++ b/libcxx/include/__format/formatter_output.h
@@ -39,7 +39,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace __formatter {
 
@@ -384,7 +384,7 @@
   return __formatter::__write(__str.begin(), __str.end(), _VSTD::move(__out_it), __specs, __size);
 }
 
-#  if _LIBCPP_STD_VER > 20
+#  if _LIBCPP_STD_VER >= 23
 
 struct __nul_terminator {};
 
@@ -561,11 +561,11 @@
   return __formatter::__write_string(basic_string_view{__str}, _VSTD::move(__out_it), __specs);
 }
 
-#  endif // _LIBCPP_STD_VER > 20
+#  endif // _LIBCPP_STD_VER >= 23
 
 } // namespace __formatter
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/formatter_pointer.h b/libcxx/include/__format/formatter_pointer.h
--- a/libcxx/include/__format/formatter_pointer.h
+++ b/libcxx/include/__format/formatter_pointer.h
@@ -27,7 +27,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <__fmt_char_type _CharT>
 struct _LIBCPP_TEMPLATE_VIS __formatter_pointer {
@@ -66,7 +66,7 @@
 struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter<const void*, _CharT>
     : public __formatter_pointer<_CharT> {};
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/formatter_string.h b/libcxx/include/__format/formatter_string.h
--- a/libcxx/include/__format/formatter_string.h
+++ b/libcxx/include/__format/formatter_string.h
@@ -27,7 +27,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <__fmt_char_type _CharT>
 struct _LIBCPP_TEMPLATE_VIS __formatter_string {
@@ -40,7 +40,7 @@
   }
 
   _LIBCPP_HIDE_FROM_ABI auto format(basic_string_view<_CharT> __str, auto& __ctx) const -> decltype(__ctx.out()) {
-#  if _LIBCPP_STD_VER > 20
+#  if _LIBCPP_STD_VER >= 23
     if (__parser_.__type_ == __format_spec::__type::__debug)
       return __formatter::__format_escaped_string(__str, __ctx.out(), __parser_.__get_parsed_std_specifications(__ctx));
 #  endif
@@ -48,7 +48,7 @@
     return __formatter::__write_string(__str, __ctx.out(), __parser_.__get_parsed_std_specifications(__ctx));
   }
 
-#  if _LIBCPP_STD_VER > 20
+#  if _LIBCPP_STD_VER >= 23
   _LIBCPP_HIDE_FROM_ABI constexpr void set_debug_format() { __parser_.__type_ = __format_spec::__type::__debug; }
 #  endif
 
@@ -66,7 +66,7 @@
                           "prevented an invalid pointer.");
 
     __format_spec::__parsed_specifications<_CharT> __specs = _Base::__parser_.__get_parsed_std_specifications(__ctx);
-#  if _LIBCPP_STD_VER > 20
+#  if _LIBCPP_STD_VER >= 23
     if (_Base::__parser_.__type_ == __format_spec::__type::__debug)
       return __formatter::__format_escaped_string(basic_string_view<_CharT>{__str}, __ctx.out(), __specs);
 #  endif
@@ -152,7 +152,7 @@
   }
 };
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/formatter_tuple.h b/libcxx/include/__format/formatter_tuple.h
--- a/libcxx/include/__format/formatter_tuple.h
+++ b/libcxx/include/__format/formatter_tuple.h
@@ -36,7 +36,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
 
 template <__fmt_char_type _CharT, class _Tuple, formattable<_CharT>... _Args>
 struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT __formatter_tuple {
@@ -171,7 +171,7 @@
 struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter<tuple<_Args...>, _CharT>
     : public __formatter_tuple<_CharT, tuple<_Args...>, _Args...> {};
 
-#endif //_LIBCPP_STD_VER > 20
+#endif //_LIBCPP_STD_VER >= 23
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/parser_std_format_spec.h b/libcxx/include/__format/parser_std_format_spec.h
--- a/libcxx/include/__format/parser_std_format_spec.h
+++ b/libcxx/include/__format/parser_std_format_spec.h
@@ -45,7 +45,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace __format_spec {
 
@@ -140,7 +140,7 @@
 inline constexpr __fields __fields_string{.__precision_ = true, .__type_ = true};
 inline constexpr __fields __fields_pointer{.__type_ = true};
 
-#  if _LIBCPP_STD_VER > 20
+#  if _LIBCPP_STD_VER >= 23
 inline constexpr __fields __fields_tuple{.__type_ = false, .__allow_colon_in_fill_ = true};
 inline constexpr __fields __fields_range{.__type_ = false, .__allow_colon_in_fill_ = true};
 #  endif
@@ -582,7 +582,7 @@
     case 'x':
       __type_ = __type::__hexadecimal_lower_case;
       break;
-#  if _LIBCPP_STD_VER > 20
+#  if _LIBCPP_STD_VER >= 23
     case '?':
       __type_ = __type::__debug;
       break;
@@ -959,7 +959,7 @@
 
 } // namespace __format_spec
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/range_default_formatter.h b/libcxx/include/__format/range_default_formatter.h
--- a/libcxx/include/__format/range_default_formatter.h
+++ b/libcxx/include/__format/range_default_formatter.h
@@ -29,7 +29,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
 
 template <class _Rp, class _CharT>
 concept __const_formattable_range =
@@ -194,7 +194,7 @@
 struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter<_Rp, _CharT>
     : __range_default_formatter<format_kind<_Rp>, _Rp, _CharT> {};
 
-#endif //_LIBCPP_STD_VER > 20
+#endif //_LIBCPP_STD_VER >= 23
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/range_formatter.h b/libcxx/include/__format/range_formatter.h
--- a/libcxx/include/__format/range_formatter.h
+++ b/libcxx/include/__format/range_formatter.h
@@ -36,7 +36,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
 
 template <class _Tp, class _CharT = char>
   requires same_as<remove_cvref_t<_Tp>, _Tp> && formattable<_Tp, _CharT>
@@ -249,7 +249,7 @@
   basic_string_view<_CharT> __closing_bracket_ = _LIBCPP_STATICALLY_WIDEN(_CharT, "]");
 };
 
-#endif //_LIBCPP_STD_VER > 20
+#endif //_LIBCPP_STD_VER >= 23
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__format/unicode.h b/libcxx/include/__format/unicode.h
--- a/libcxx/include/__format/unicode.h
+++ b/libcxx/include/__format/unicode.h
@@ -27,11 +27,11 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace __unicode {
 
-#  if _LIBCPP_STD_VER > 20
+#  if _LIBCPP_STD_VER >= 23
 
 /// The result of consuming a code point using P2286' semantics
 ///
@@ -47,7 +47,7 @@
   char32_t __value;
 };
 
-#  endif // _LIBCPP_STD_VER > 20
+#  endif // _LIBCPP_STD_VER >= 23
 
 #  ifndef _LIBCPP_HAS_NO_UNICODE
 
@@ -150,7 +150,7 @@
     return __replacement_character;
   }
 
-#    if _LIBCPP_STD_VER > 20
+#    if _LIBCPP_STD_VER >= 23
   _LIBCPP_HIDE_FROM_ABI constexpr __consume_p2286_result __consume_p2286() noexcept {
     _LIBCPP_ASSERT(__first_ != __last_, "can't move beyond the end of input");
 
@@ -212,7 +212,7 @@
     // "in sync" after a few code units.
     return {1, static_cast<unsigned char>(*__first_++)};
   }
-#    endif // _LIBCPP_STD_VER > 20
+#    endif // _LIBCPP_STD_VER >= 23
 
 private:
   _Iterator __first_;
@@ -273,7 +273,7 @@
     }
   }
 
-#      if _LIBCPP_STD_VER > 20
+#      if _LIBCPP_STD_VER >= 23
   _LIBCPP_HIDE_FROM_ABI constexpr __consume_p2286_result __consume_p2286() noexcept {
     _LIBCPP_ASSERT(__first_ != __last_, "can't move beyond the end of input");
 
@@ -299,7 +299,7 @@
 
     return {0, __result};
   }
-#      endif // _LIBCPP_STD_VER > 20
+#      endif // _LIBCPP_STD_VER >= 23
 
 private:
   _Iterator __first_;
@@ -479,13 +479,13 @@
     return *__first_++;
   }
 
-#    if _LIBCPP_STD_VER > 20
+#    if _LIBCPP_STD_VER >= 23
   _LIBCPP_HIDE_FROM_ABI constexpr __consume_p2286_result __consume_p2286() noexcept {
     _LIBCPP_ASSERT(__first_ != __last_, "can't move beyond the end of input");
 
     return {0, std::make_unsigned_t<_CharT>(*__first_++)};
   }
-#    endif // _LIBCPP_STD_VER > 20
+#    endif // _LIBCPP_STD_VER >= 23
 
 private:
   _Iterator __first_;
@@ -496,7 +496,7 @@
 
 } // namespace __unicode
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__functional/bind.h b/libcxx/include/__functional/bind.h
--- a/libcxx/include/__functional/bind.h
+++ b/libcxx/include/__functional/bind.h
@@ -30,7 +30,7 @@
     is_bind_expression<__remove_cvref_t<_Tp> >
 > {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr size_t is_bind_expression_v = is_bind_expression<_Tp>::value;
 #endif
@@ -42,7 +42,7 @@
     is_placeholder<__remove_cvref_t<_Tp> >
 > {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr size_t is_placeholder_v = is_placeholder<_Tp>::value;
 #endif
diff --git a/libcxx/include/__functional/bind_back.h b/libcxx/include/__functional/bind_back.h
--- a/libcxx/include/__functional/bind_back.h
+++ b/libcxx/include/__functional/bind_back.h
@@ -24,7 +24,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <size_t _NBound, class = make_index_sequence<_NBound>>
 struct __bind_back_op;
@@ -57,7 +57,7 @@
     -> decltype(      __bind_back_t<decay_t<_Fn>, tuple<decay_t<_Args>...>>(_VSTD::forward<_Fn>(__f), _VSTD::forward_as_tuple(_VSTD::forward<_Args>(__args)...)))
     { return          __bind_back_t<decay_t<_Fn>, tuple<decay_t<_Args>...>>(_VSTD::forward<_Fn>(__f), _VSTD::forward_as_tuple(_VSTD::forward<_Args>(__args)...)); }
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__functional/bind_front.h b/libcxx/include/__functional/bind_front.h
--- a/libcxx/include/__functional/bind_front.h
+++ b/libcxx/include/__functional/bind_front.h
@@ -22,7 +22,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 struct __bind_front_op {
     template <class ..._Args>
@@ -51,7 +51,7 @@
     return __bind_front_t<decay_t<_Fn>, decay_t<_Args>...>(_VSTD::forward<_Fn>(__f), _VSTD::forward<_Args>(__args)...);
 }
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__functional/boyer_moore_searcher.h b/libcxx/include/__functional/boyer_moore_searcher.h
--- a/libcxx/include/__functional/boyer_moore_searcher.h
+++ b/libcxx/include/__functional/boyer_moore_searcher.h
@@ -25,7 +25,7 @@
 #include <unordered_map>
 #include <vector>
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 _LIBCPP_PUSH_MACROS
 #include <__undef_macros>
@@ -310,6 +310,6 @@
 
 _LIBCPP_POP_MACROS
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 #endif // _LIBCPP___FUNCTIONAL_BOYER_MOORE_SEARCHER_H
diff --git a/libcxx/include/__functional/compose.h b/libcxx/include/__functional/compose.h
--- a/libcxx/include/__functional/compose.h
+++ b/libcxx/include/__functional/compose.h
@@ -22,7 +22,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 struct __compose_op {
     template<class _Fn1, class _Fn2, class ..._Args>
@@ -45,7 +45,7 @@
     -> decltype(      __compose_t<decay_t<_Fn1>, decay_t<_Fn2>>(_VSTD::forward<_Fn1>(__f1), _VSTD::forward<_Fn2>(__f2)))
     { return          __compose_t<decay_t<_Fn1>, decay_t<_Fn2>>(_VSTD::forward<_Fn1>(__f1), _VSTD::forward<_Fn2>(__f2)); }
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__functional/default_searcher.h b/libcxx/include/__functional/default_searcher.h
--- a/libcxx/include/__functional/default_searcher.h
+++ b/libcxx/include/__functional/default_searcher.h
@@ -23,7 +23,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 // default searcher
 template<class _ForwardIterator, class _BinaryPredicate = equal_to<>>
@@ -50,7 +50,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(default_searcher);
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__functional/hash.h b/libcxx/include/__functional/hash.h
--- a/libcxx/include/__functional/hash.h
+++ b/libcxx/include/__functional/hash.h
@@ -640,7 +640,7 @@
 {
 };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 template <>
 struct _LIBCPP_TEMPLATE_VIS hash<nullptr_t>
@@ -667,7 +667,7 @@
     is_default_constructible<_Hash>::value
 >;
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Type, class>
 using __enable_hash_helper_imp _LIBCPP_NODEBUG = _Type;
 
diff --git a/libcxx/include/__functional/identity.h b/libcxx/include/__functional/identity.h
--- a/libcxx/include/__functional/identity.h
+++ b/libcxx/include/__functional/identity.h
@@ -28,7 +28,7 @@
   using is_transparent = void;
 };
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 struct identity {
     template<class _Tp>
@@ -39,7 +39,7 @@
 
     using is_transparent = void;
 };
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__functional/invoke.h b/libcxx/include/__functional/invoke.h
--- a/libcxx/include/__functional/invoke.h
+++ b/libcxx/include/__functional/invoke.h
@@ -488,7 +488,7 @@
     }
 };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 // is_invocable
 
@@ -539,7 +539,7 @@
     return _VSTD::__invoke(_VSTD::forward<_Fn>(__f), _VSTD::forward<_Args>(__args)...);
 }
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 #if _LIBCPP_STD_VER >= 23
 template <class _Result, class _Fn, class... _Args>
diff --git a/libcxx/include/__functional/is_transparent.h b/libcxx/include/__functional/is_transparent.h
--- a/libcxx/include/__functional/is_transparent.h
+++ b/libcxx/include/__functional/is_transparent.h
@@ -19,7 +19,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 
 template <class _Tp, class, class = void>
 struct __is_transparent : false_type {};
diff --git a/libcxx/include/__functional/not_fn.h b/libcxx/include/__functional/not_fn.h
--- a/libcxx/include/__functional/not_fn.h
+++ b/libcxx/include/__functional/not_fn.h
@@ -22,7 +22,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 struct __not_fn_op {
     template <class... _Args>
@@ -47,7 +47,7 @@
     return __not_fn_t<decay_t<_Fn>>(_VSTD::forward<_Fn>(__f));
 }
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__functional/operations.h b/libcxx/include/__functional/operations.h
--- a/libcxx/include/__functional/operations.h
+++ b/libcxx/include/__functional/operations.h
@@ -23,7 +23,7 @@
 
 // Arithmetic operations
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp = void>
 #else
 template <class _Tp>
@@ -38,7 +38,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(plus);
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <>
 struct _LIBCPP_TEMPLATE_VIS plus<void>
 {
@@ -52,7 +52,7 @@
 };
 #endif
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp = void>
 #else
 template <class _Tp>
@@ -67,7 +67,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(minus);
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <>
 struct _LIBCPP_TEMPLATE_VIS minus<void>
 {
@@ -81,7 +81,7 @@
 };
 #endif
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp = void>
 #else
 template <class _Tp>
@@ -96,7 +96,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(multiplies);
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <>
 struct _LIBCPP_TEMPLATE_VIS multiplies<void>
 {
@@ -110,7 +110,7 @@
 };
 #endif
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp = void>
 #else
 template <class _Tp>
@@ -125,7 +125,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(divides);
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <>
 struct _LIBCPP_TEMPLATE_VIS divides<void>
 {
@@ -139,7 +139,7 @@
 };
 #endif
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp = void>
 #else
 template <class _Tp>
@@ -154,7 +154,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(modulus);
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <>
 struct _LIBCPP_TEMPLATE_VIS modulus<void>
 {
@@ -168,7 +168,7 @@
 };
 #endif
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp = void>
 #else
 template <class _Tp>
@@ -183,7 +183,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(negate);
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <>
 struct _LIBCPP_TEMPLATE_VIS negate<void>
 {
@@ -199,7 +199,7 @@
 
 // Bitwise operations
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp = void>
 #else
 template <class _Tp>
@@ -214,7 +214,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(bit_and);
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <>
 struct _LIBCPP_TEMPLATE_VIS bit_and<void>
 {
@@ -228,7 +228,7 @@
 };
 #endif
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp = void>
 struct _LIBCPP_TEMPLATE_VIS bit_not
     : __unary_function<_Tp, _Tp>
@@ -252,7 +252,7 @@
 };
 #endif
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp = void>
 #else
 template <class _Tp>
@@ -267,7 +267,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(bit_or);
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <>
 struct _LIBCPP_TEMPLATE_VIS bit_or<void>
 {
@@ -281,7 +281,7 @@
 };
 #endif
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp = void>
 #else
 template <class _Tp>
@@ -296,7 +296,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(bit_xor);
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <>
 struct _LIBCPP_TEMPLATE_VIS bit_xor<void>
 {
@@ -312,7 +312,7 @@
 
 // Comparison operations
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp = void>
 #else
 template <class _Tp>
@@ -327,7 +327,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(equal_to);
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <>
 struct _LIBCPP_TEMPLATE_VIS equal_to<void>
 {
@@ -341,7 +341,7 @@
 };
 #endif
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp = void>
 #else
 template <class _Tp>
@@ -356,7 +356,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(not_equal_to);
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <>
 struct _LIBCPP_TEMPLATE_VIS not_equal_to<void>
 {
@@ -370,7 +370,7 @@
 };
 #endif
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp = void>
 #else
 template <class _Tp>
@@ -385,7 +385,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(less);
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <>
 struct _LIBCPP_TEMPLATE_VIS less<void>
 {
@@ -399,7 +399,7 @@
 };
 #endif
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp = void>
 #else
 template <class _Tp>
@@ -414,7 +414,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(less_equal);
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <>
 struct _LIBCPP_TEMPLATE_VIS less_equal<void>
 {
@@ -428,7 +428,7 @@
 };
 #endif
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp = void>
 #else
 template <class _Tp>
@@ -443,7 +443,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(greater_equal);
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <>
 struct _LIBCPP_TEMPLATE_VIS greater_equal<void>
 {
@@ -457,7 +457,7 @@
 };
 #endif
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp = void>
 #else
 template <class _Tp>
@@ -472,7 +472,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(greater);
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <>
 struct _LIBCPP_TEMPLATE_VIS greater<void>
 {
@@ -488,7 +488,7 @@
 
 // Logical operations
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp = void>
 #else
 template <class _Tp>
@@ -503,7 +503,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(logical_and);
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <>
 struct _LIBCPP_TEMPLATE_VIS logical_and<void>
 {
@@ -517,7 +517,7 @@
 };
 #endif
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp = void>
 #else
 template <class _Tp>
@@ -532,7 +532,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(logical_not);
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <>
 struct _LIBCPP_TEMPLATE_VIS logical_not<void>
 {
@@ -546,7 +546,7 @@
 };
 #endif
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp = void>
 #else
 template <class _Tp>
@@ -561,7 +561,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(logical_or);
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <>
 struct _LIBCPP_TEMPLATE_VIS logical_or<void>
 {
diff --git a/libcxx/include/__functional/perfect_forward.h b/libcxx/include/__functional/perfect_forward.h
--- a/libcxx/include/__functional/perfect_forward.h
+++ b/libcxx/include/__functional/perfect_forward.h
@@ -23,7 +23,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 template <class _Op, class _Indices, class... _BoundArgs>
 struct __perfect_forward_impl;
@@ -87,7 +87,7 @@
 template <class _Op, class ..._Args>
 using __perfect_forward = __perfect_forward_impl<_Op, index_sequence_for<_Args...>, _Args...>;
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__functional/ranges_operations.h b/libcxx/include/__functional/ranges_operations.h
--- a/libcxx/include/__functional/ranges_operations.h
+++ b/libcxx/include/__functional/ranges_operations.h
@@ -21,7 +21,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
 
@@ -93,7 +93,7 @@
 
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__functional/reference_wrapper.h b/libcxx/include/__functional/reference_wrapper.h
--- a/libcxx/include/__functional/reference_wrapper.h
+++ b/libcxx/include/__functional/reference_wrapper.h
@@ -56,7 +56,7 @@
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
     typename __invoke_of<type&, _ArgTypes...>::type
     operator() (_ArgTypes&&... __args) const
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
         // Since is_nothrow_invocable requires C++17 LWG3764 is not backported
         // to earlier versions.
         noexcept(is_nothrow_invocable_v<_Tp&, _ArgTypes...>)
@@ -66,7 +66,7 @@
     }
 };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 reference_wrapper(_Tp&) -> reference_wrapper<_Tp>;
 #endif
diff --git a/libcxx/include/__functional/unwrap_ref.h b/libcxx/include/__functional/unwrap_ref.h
--- a/libcxx/include/__functional/unwrap_ref.h
+++ b/libcxx/include/__functional/unwrap_ref.h
@@ -30,7 +30,7 @@
 template <class _Tp>
 struct decay;
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Tp>
 struct unwrap_reference : __unwrap_reference<_Tp> { };
 
@@ -46,7 +46,7 @@
 
 template <class _Tp>
 struct __unwrap_ref_decay
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     : unwrap_ref_decay<_Tp>
 #else
     : __unwrap_reference<typename decay<_Tp>::type>
diff --git a/libcxx/include/__fwd/span.h b/libcxx/include/__fwd/span.h
--- a/libcxx/include/__fwd/span.h
+++ b/libcxx/include/__fwd/span.h
@@ -23,7 +23,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 inline constexpr size_t dynamic_extent = numeric_limits<size_t>::max();
 template <typename _Tp, size_t _Extent = dynamic_extent> class span;
diff --git a/libcxx/include/__hash_table b/libcxx/include/__hash_table
--- a/libcxx/include/__hash_table
+++ b/libcxx/include/__hash_table
@@ -826,7 +826,7 @@
     template <class> friend class __hash_map_node_destructor;
 };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _NodeType, class _Alloc>
 struct __generic_container_node_destructor;
 
@@ -1121,7 +1121,7 @@
         return __emplace_unique_key_args(_NodeTypes::__get_key(__x), __x);
     }
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     template <class _NodeHandle, class _InsertReturnType>
     _LIBCPP_INLINE_VISIBILITY
     _InsertReturnType __node_handle_insert_unique(_NodeHandle&& __nh);
@@ -2088,7 +2088,7 @@
     return __r;
 }
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp, class _Hash, class _Equal, class _Alloc>
 template <class _NodeHandle, class _InsertReturnType>
 _LIBCPP_INLINE_VISIBILITY
@@ -2218,7 +2218,7 @@
         __node_insert_multi_perform(__src_ptr, __pn);
     }
 }
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 template <class _Tp, class _Hash, class _Equal, class _Alloc>
 template <bool _UniqueKeys>
diff --git a/libcxx/include/__iterator/access.h b/libcxx/include/__iterator/access.h
--- a/libcxx/include/__iterator/access.h
+++ b/libcxx/include/__iterator/access.h
@@ -69,7 +69,7 @@
     return __c.end();
 }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 
 template <class _Cp>
 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
diff --git a/libcxx/include/__iterator/advance.h b/libcxx/include/__iterator/advance.h
--- a/libcxx/include/__iterator/advance.h
+++ b/libcxx/include/__iterator/advance.h
@@ -69,7 +69,7 @@
   _VSTD::__advance(__i, __n, typename iterator_traits<_InputIter>::iterator_category());
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [range.iter.op.advance]
 
@@ -196,7 +196,7 @@
 } // namespace __cpo
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/back_insert_iterator.h b/libcxx/include/__iterator/back_insert_iterator.h
--- a/libcxx/include/__iterator/back_insert_iterator.h
+++ b/libcxx/include/__iterator/back_insert_iterator.h
@@ -36,7 +36,7 @@
 public:
     typedef output_iterator_tag iterator_category;
     typedef void value_type;
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     typedef ptrdiff_t difference_type;
 #else
     typedef void difference_type;
diff --git a/libcxx/include/__iterator/bounded_iter.h b/libcxx/include/__iterator/bounded_iter.h
--- a/libcxx/include/__iterator/bounded_iter.h
+++ b/libcxx/include/__iterator/bounded_iter.h
@@ -42,7 +42,7 @@
   using pointer           = typename iterator_traits<_Iterator>::pointer;
   using reference         = typename iterator_traits<_Iterator>::reference;
   using iterator_category = typename iterator_traits<_Iterator>::iterator_category;
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
   using iterator_concept = contiguous_iterator_tag;
 #endif
 
diff --git a/libcxx/include/__iterator/common_iterator.h b/libcxx/include/__iterator/common_iterator.h
--- a/libcxx/include/__iterator/common_iterator.h
+++ b/libcxx/include/__iterator/common_iterator.h
@@ -35,7 +35,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template<class _Iter>
 concept __can_use_postfix_proxy =
@@ -274,7 +274,7 @@
   using reference = iter_reference_t<_Iter>;
 };
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/concepts.h b/libcxx/include/__iterator/concepts.h
--- a/libcxx/include/__iterator/concepts.h
+++ b/libcxx/include/__iterator/concepts.h
@@ -46,7 +46,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [iterator.concept.readable]
 template<class _In>
@@ -293,7 +293,7 @@
 // Note: indirectly_swappable is located in iter_swap.h to prevent a dependency cycle
 // (both iter_swap and indirectly_swappable require indirectly_readable).
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/counted_iterator.h b/libcxx/include/__iterator/counted_iterator.h
--- a/libcxx/include/__iterator/counted_iterator.h
+++ b/libcxx/include/__iterator/counted_iterator.h
@@ -36,7 +36,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template<class>
 struct __counted_iterator_concept {};
@@ -303,7 +303,7 @@
                                 add_pointer_t<iter_reference_t<_Iter>>, void>;
 };
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/data.h b/libcxx/include/__iterator/data.h
--- a/libcxx/include/__iterator/data.h
+++ b/libcxx/include/__iterator/data.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 template <class _Cont> constexpr
 _LIBCPP_INLINE_VISIBILITY
diff --git a/libcxx/include/__iterator/default_sentinel.h b/libcxx/include/__iterator/default_sentinel.h
--- a/libcxx/include/__iterator/default_sentinel.h
+++ b/libcxx/include/__iterator/default_sentinel.h
@@ -18,12 +18,12 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 struct default_sentinel_t { };
 inline constexpr default_sentinel_t default_sentinel{};
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/distance.h b/libcxx/include/__iterator/distance.h
--- a/libcxx/include/__iterator/distance.h
+++ b/libcxx/include/__iterator/distance.h
@@ -53,7 +53,7 @@
     return _VSTD::__distance(__first, __last, typename iterator_traits<_InputIter>::iterator_category());
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [range.iter.op.distance]
 
@@ -101,7 +101,7 @@
 } // namespace __cpo
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/empty.h b/libcxx/include/__iterator/empty.h
--- a/libcxx/include/__iterator/empty.h
+++ b/libcxx/include/__iterator/empty.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 template <class _Cont>
 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY
@@ -37,7 +37,7 @@
 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY
 constexpr bool empty(initializer_list<_Ep> __il) noexcept { return __il.size() == 0; }
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/front_insert_iterator.h b/libcxx/include/__iterator/front_insert_iterator.h
--- a/libcxx/include/__iterator/front_insert_iterator.h
+++ b/libcxx/include/__iterator/front_insert_iterator.h
@@ -36,7 +36,7 @@
 public:
     typedef output_iterator_tag iterator_category;
     typedef void value_type;
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     typedef ptrdiff_t difference_type;
 #else
     typedef void difference_type;
diff --git a/libcxx/include/__iterator/incrementable_traits.h b/libcxx/include/__iterator/incrementable_traits.h
--- a/libcxx/include/__iterator/incrementable_traits.h
+++ b/libcxx/include/__iterator/incrementable_traits.h
@@ -26,7 +26,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [incrementable.traits]
 template<class> struct incrementable_traits {};
@@ -71,7 +71,7 @@
                                                  incrementable_traits<remove_cvref_t<_Ip> >,
                                                  iterator_traits<remove_cvref_t<_Ip> > >::difference_type;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/indirectly_comparable.h b/libcxx/include/__iterator/indirectly_comparable.h
--- a/libcxx/include/__iterator/indirectly_comparable.h
+++ b/libcxx/include/__iterator/indirectly_comparable.h
@@ -21,13 +21,13 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class _I1, class _I2, class _Rp, class _P1 = identity, class _P2 = identity>
 concept indirectly_comparable =
   indirect_binary_predicate<_Rp, projected<_I1, _P1>, projected<_I2, _P2>>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/insert_iterator.h b/libcxx/include/__iterator/insert_iterator.h
--- a/libcxx/include/__iterator/insert_iterator.h
+++ b/libcxx/include/__iterator/insert_iterator.h
@@ -24,7 +24,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Container>
 using __insert_iterator_iter_t = ranges::iterator_t<_Container>;
 #else
@@ -46,7 +46,7 @@
 public:
     typedef output_iterator_tag iterator_category;
     typedef void value_type;
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     typedef ptrdiff_t difference_type;
 #else
     typedef void difference_type;
diff --git a/libcxx/include/__iterator/istream_iterator.h b/libcxx/include/__iterator/istream_iterator.h
--- a/libcxx/include/__iterator/istream_iterator.h
+++ b/libcxx/include/__iterator/istream_iterator.h
@@ -47,9 +47,9 @@
     _Tp __value_;
 public:
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istream_iterator() : __in_stream_(nullptr), __value_() {}
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     _LIBCPP_HIDE_FROM_ABI constexpr istream_iterator(default_sentinel_t) : istream_iterator() {}
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
     _LIBCPP_INLINE_VISIBILITY istream_iterator(istream_type& __s) : __in_stream_(_VSTD::addressof(__s))
         {
             if (!(*__in_stream_ >> __value_))
@@ -73,11 +73,11 @@
     operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x,
                const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y);
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     friend _LIBCPP_HIDE_FROM_ABI bool operator==(const istream_iterator& __i, default_sentinel_t) {
       return __i.__in_stream_ == nullptr;
     }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 };
 
 template <class _Tp, class _CharT, class _Traits, class _Distance>
diff --git a/libcxx/include/__iterator/istreambuf_iterator.h b/libcxx/include/__iterator/istreambuf_iterator.h
--- a/libcxx/include/__iterator/istreambuf_iterator.h
+++ b/libcxx/include/__iterator/istreambuf_iterator.h
@@ -67,10 +67,10 @@
     }
 public:
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istreambuf_iterator() _NOEXCEPT : __sbuf_(nullptr) {}
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     _LIBCPP_INLINE_VISIBILITY constexpr istreambuf_iterator(default_sentinel_t) noexcept
         : istreambuf_iterator() {}
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
     _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(istream_type& __s) _NOEXCEPT
         : __sbuf_(__s.rdbuf()) {}
     _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(streambuf_type* __s) _NOEXCEPT
@@ -93,11 +93,11 @@
     _LIBCPP_INLINE_VISIBILITY bool equal(const istreambuf_iterator& __b) const
         {return __test_for_eof() == __b.__test_for_eof();}
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     friend _LIBCPP_HIDE_FROM_ABI bool operator==(const istreambuf_iterator& __i, default_sentinel_t) {
       return __i.__test_for_eof();
     }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 };
 
 template <class _CharT, class _Traits>
diff --git a/libcxx/include/__iterator/iter_move.h b/libcxx/include/__iterator/iter_move.h
--- a/libcxx/include/__iterator/iter_move.h
+++ b/libcxx/include/__iterator/iter_move.h
@@ -25,7 +25,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [iterator.cust.move]
 
@@ -97,7 +97,7 @@
   requires requires(_Tp& __t) { { ranges::iter_move(__t) } -> __can_reference; }
 using iter_rvalue_reference_t = decltype(ranges::iter_move(std::declval<_Tp&>()));
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/iter_swap.h b/libcxx/include/__iterator/iter_swap.h
--- a/libcxx/include/__iterator/iter_swap.h
+++ b/libcxx/include/__iterator/iter_swap.h
@@ -28,7 +28,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [iter.cust.swap]
 
@@ -106,7 +106,7 @@
     ranges::iter_swap(__i2, __i1);
   };
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/iterator_traits.h b/libcxx/include/__iterator/iterator_traits.h
--- a/libcxx/include/__iterator/iterator_traits.h
+++ b/libcxx/include/__iterator/iterator_traits.h
@@ -43,7 +43,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class _Tp>
 using __with_reference = _Tp&;
@@ -62,7 +62,7 @@
 template<__dereferenceable _Tp>
 using iter_reference_t = decltype(*std::declval<_Tp&>());
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 template <class _Iter>
 struct _LIBCPP_TEMPLATE_VIS iterator_traits;
@@ -72,7 +72,7 @@
 struct _LIBCPP_TEMPLATE_VIS forward_iterator_tag       : public input_iterator_tag {};
 struct _LIBCPP_TEMPLATE_VIS bidirectional_iterator_tag : public forward_iterator_tag {};
 struct _LIBCPP_TEMPLATE_VIS random_access_iterator_tag : public bidirectional_iterator_tag {};
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 struct _LIBCPP_TEMPLATE_VIS contiguous_iterator_tag    : public random_access_iterator_tag {};
 #endif
 
@@ -157,7 +157,7 @@
     static const bool value = decltype(__test<_Tp>(nullptr))::value;
 };
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // The `cpp17-*-iterator` exposition-only concepts have very similar names to the `Cpp17*Iterator` named requirements
 // from `[iterator.cpp17]`. To avoid confusion between the two, the exposition-only concepts have been banished to
@@ -381,7 +381,7 @@
   using __primary_template = iterator_traits;
 };
 
-#else // _LIBCPP_STD_VER > 17
+#else // _LIBCPP_STD_VER >= 20
 
 template <class _Iter, bool> struct __iterator_traits {};
 
@@ -418,10 +418,10 @@
 
   using __primary_template = iterator_traits;
 };
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 template<class _Tp>
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 requires is_object_v<_Tp>
 #endif
 struct _LIBCPP_TEMPLATE_VIS iterator_traits<_Tp*>
@@ -431,7 +431,7 @@
     typedef _Tp* pointer;
     typedef _Tp& reference;
     typedef random_access_iterator_tag iterator_category;
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     typedef contiguous_iterator_tag    iterator_concept;
 #endif
 };
@@ -471,7 +471,7 @@
 // Such iterators receive special "contiguous" optimizations in
 // std::copy and std::sort.
 //
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Tp>
 struct __is_cpp17_contiguous_iterator : _Or<
     __has_iterator_category_convertible_to<_Tp, contiguous_iterator_tag>,
diff --git a/libcxx/include/__iterator/mergeable.h b/libcxx/include/__iterator/mergeable.h
--- a/libcxx/include/__iterator/mergeable.h
+++ b/libcxx/include/__iterator/mergeable.h
@@ -22,7 +22,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class _Input1, class _Input2, class _Output,
           class _Comp = ranges::less, class _Proj1 = identity, class _Proj2 = identity>
@@ -34,7 +34,7 @@
     indirectly_copyable<_Input2, _Output> &&
     indirect_strict_weak_order<_Comp, projected<_Input1, _Proj1>, projected<_Input2, _Proj2>>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/move_iterator.h b/libcxx/include/__iterator/move_iterator.h
--- a/libcxx/include/__iterator/move_iterator.h
+++ b/libcxx/include/__iterator/move_iterator.h
@@ -41,7 +41,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template<class _Iter, class = void>
 struct __move_iter_category_base {};
 
@@ -59,16 +59,16 @@
 concept __move_iter_comparable = requires {
     { std::declval<const _Iter&>() == std::declval<_Sent>() } -> convertible_to<bool>;
 };
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 template <class _Iter>
 class _LIBCPP_TEMPLATE_VIS move_iterator
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     : public __move_iter_category_base<_Iter>
 #endif
 {
 public:
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     using iterator_type = _Iter;
     using iterator_concept = input_iterator_tag;
     // iterator_category is inherited and not always present
@@ -93,7 +93,7 @@
             __libcpp_remove_reference_t<__reference>&&,
             __reference
         >::type reference;
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17
     explicit move_iterator(_Iter __i) : __current_(std::move(__i)) {}
@@ -104,7 +104,7 @@
     _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17
     pointer operator->() const { return __current_; }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     _LIBCPP_HIDE_FROM_ABI constexpr
     move_iterator() requires is_constructible_v<_Iter> : __current_() {}
 
@@ -171,7 +171,7 @@
 
     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17
     move_iterator operator++(int) { move_iterator __tmp(*this); ++__current_; return __tmp; }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17
     move_iterator& operator--() { --__current_; return *this; }
@@ -186,7 +186,7 @@
     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17
     move_iterator& operator-=(difference_type __n) { __current_ -= __n; return *this; }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     template<sentinel_for<_Iter> _Sent>
     friend _LIBCPP_HIDE_FROM_ABI constexpr
     bool operator==(const move_iterator& __x, const move_sentinel<_Sent>& __y)
@@ -223,7 +223,7 @@
     {
         return ranges::iter_swap(__x.__current_, __y.__current_);
     }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 private:
     template<class _It2> friend class move_iterator;
@@ -276,7 +276,7 @@
     return __x.base() >= __y.base();
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Iter1, three_way_comparable_with<_Iter1> _Iter2>
 inline _LIBCPP_HIDE_FROM_ABI constexpr
 auto operator<=>(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
@@ -284,7 +284,7 @@
 {
     return __x.base() <=> __y.base();
 }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #ifndef _LIBCPP_CXX03_LANG
 template <class _Iter1, class _Iter2>
@@ -304,7 +304,7 @@
 }
 #endif // !_LIBCPP_CXX03_LANG
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Iter>
 inline _LIBCPP_HIDE_FROM_ABI constexpr
 move_iterator<_Iter> operator+(iter_difference_t<_Iter> __n, const move_iterator<_Iter>& __x)
@@ -320,7 +320,7 @@
 {
     return move_iterator<_Iter>(__x.base() + __n);
 }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 template <class _Iter>
 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17
diff --git a/libcxx/include/__iterator/move_sentinel.h b/libcxx/include/__iterator/move_sentinel.h
--- a/libcxx/include/__iterator/move_sentinel.h
+++ b/libcxx/include/__iterator/move_sentinel.h
@@ -21,7 +21,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <semiregular _Sent>
 class _LIBCPP_TEMPLATE_VIS move_sentinel
@@ -52,7 +52,7 @@
 
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(move_sentinel);
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/next.h b/libcxx/include/__iterator/next.h
--- a/libcxx/include/__iterator/next.h
+++ b/libcxx/include/__iterator/next.h
@@ -35,7 +35,7 @@
   return __x;
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [range.iter.op.next]
 
@@ -77,7 +77,7 @@
 } // namespace __cpo
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/ostream_iterator.h b/libcxx/include/__iterator/ostream_iterator.h
--- a/libcxx/include/__iterator/ostream_iterator.h
+++ b/libcxx/include/__iterator/ostream_iterator.h
@@ -34,7 +34,7 @@
 public:
     typedef output_iterator_tag             iterator_category;
     typedef void                            value_type;
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     typedef ptrdiff_t                       difference_type;
 #else
     typedef void                            difference_type;
diff --git a/libcxx/include/__iterator/ostreambuf_iterator.h b/libcxx/include/__iterator/ostreambuf_iterator.h
--- a/libcxx/include/__iterator/ostreambuf_iterator.h
+++ b/libcxx/include/__iterator/ostreambuf_iterator.h
@@ -33,7 +33,7 @@
 public:
     typedef output_iterator_tag                 iterator_category;
     typedef void                                value_type;
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     typedef ptrdiff_t                           difference_type;
 #else
     typedef void                                difference_type;
diff --git a/libcxx/include/__iterator/permutable.h b/libcxx/include/__iterator/permutable.h
--- a/libcxx/include/__iterator/permutable.h
+++ b/libcxx/include/__iterator/permutable.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class _Iterator>
 concept permutable =
@@ -28,7 +28,7 @@
     indirectly_movable_storable<_Iterator, _Iterator> &&
     indirectly_swappable<_Iterator, _Iterator>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/prev.h b/libcxx/include/__iterator/prev.h
--- a/libcxx/include/__iterator/prev.h
+++ b/libcxx/include/__iterator/prev.h
@@ -34,7 +34,7 @@
   return __x;
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [range.iter.op.prev]
 
@@ -70,7 +70,7 @@
 } // namespace __cpo
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/projected.h b/libcxx/include/__iterator/projected.h
--- a/libcxx/include/__iterator/projected.h
+++ b/libcxx/include/__iterator/projected.h
@@ -21,7 +21,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template<indirectly_readable _It, indirectly_regular_unary_invocable<_It> _Proj>
 struct projected {
@@ -34,7 +34,7 @@
   using difference_type = iter_difference_t<_It>;
 };
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/readable_traits.h b/libcxx/include/__iterator/readable_traits.h
--- a/libcxx/include/__iterator/readable_traits.h
+++ b/libcxx/include/__iterator/readable_traits.h
@@ -26,7 +26,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [readable.traits]
 template<class> struct __cond_value_type {};
@@ -85,7 +85,7 @@
                                             indirectly_readable_traits<remove_cvref_t<_Ip> >,
                                             iterator_traits<remove_cvref_t<_Ip> > >::value_type;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/reverse_access.h b/libcxx/include/__iterator/reverse_access.h
--- a/libcxx/include/__iterator/reverse_access.h
+++ b/libcxx/include/__iterator/reverse_access.h
@@ -21,7 +21,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 
 template <class _Tp, size_t _Np>
 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
@@ -93,7 +93,7 @@
     return _VSTD::rend(__c);
 }
 
-#endif // _LIBCPP_STD_VER > 11
+#endif // _LIBCPP_STD_VER >= 14
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/reverse_iterator.h b/libcxx/include/__iterator/reverse_iterator.h
--- a/libcxx/include/__iterator/reverse_iterator.h
+++ b/libcxx/include/__iterator/reverse_iterator.h
@@ -63,10 +63,10 @@
     _Iter __t_; // no longer used as of LWG #2360, not removed due to ABI break
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     static_assert(__is_cpp17_bidirectional_iterator<_Iter>::value || bidirectional_iterator<_Iter>,
         "reverse_iterator<It> requires It to be a bidirectional iterator.");
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 protected:
     _Iter current;
@@ -77,7 +77,7 @@
                                   random_access_iterator_tag,
                                   typename iterator_traits<_Iter>::iterator_category>;
     using pointer = typename iterator_traits<_Iter>::pointer;
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     using iterator_concept = _If<random_access_iterator<_Iter>, random_access_iterator_tag, bidirectional_iterator_tag>;
     using value_type = iter_value_t<_Iter>;
     using difference_type = iter_difference_t<_Iter>;
@@ -144,7 +144,7 @@
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
     reference operator*() const {_Iter __tmp = current; return *--__tmp;}
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     _LIBCPP_INLINE_VISIBILITY
     constexpr pointer operator->() const
       requires is_pointer_v<_Iter> || requires(const _Iter __i) { __i.operator->(); }
@@ -160,7 +160,7 @@
     pointer operator->() const {
       return std::addressof(operator*());
     }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
     reverse_iterator& operator++() {--current; return *this;}
@@ -181,7 +181,7 @@
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
     reference operator[](difference_type __n) const {return *(*this + __n);}
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     _LIBCPP_HIDE_FROM_ABI friend constexpr
     iter_rvalue_reference_t<_Iter> iter_move(const reverse_iterator& __i)
       noexcept(is_nothrow_copy_constructible_v<_Iter> &&
@@ -200,18 +200,18 @@
       auto __ytmp = __y.base();
       ranges::iter_swap(--__xtmp, --__ytmp);
     }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 };
 
 template <class _Iter1, class _Iter2>
 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
 bool
 operator==(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y)
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     requires requires {
       { __x.base() == __y.base() } -> convertible_to<bool>;
     }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 {
     return __x.base() == __y.base();
 }
@@ -220,11 +220,11 @@
 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
 bool
 operator<(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y)
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     requires requires {
         { __x.base() > __y.base() } -> convertible_to<bool>;
       }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 {
     return __x.base() > __y.base();
 }
@@ -233,11 +233,11 @@
 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
 bool
 operator!=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y)
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     requires requires {
       { __x.base() != __y.base() } -> convertible_to<bool>;
     }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 {
     return __x.base() != __y.base();
 }
@@ -246,11 +246,11 @@
 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
 bool
 operator>(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y)
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     requires requires {
         { __x.base() < __y.base() } -> convertible_to<bool>;
       }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 {
     return __x.base() < __y.base();
 }
@@ -259,11 +259,11 @@
 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
 bool
 operator>=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y)
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     requires requires {
         { __x.base() <= __y.base() } -> convertible_to<bool>;
       }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 {
     return __x.base() <= __y.base();
 }
@@ -272,16 +272,16 @@
 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
 bool
 operator<=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y)
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     requires requires {
         { __x.base() >= __y.base() } -> convertible_to<bool>;
       }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 {
     return __x.base() >= __y.base();
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Iter1, three_way_comparable_with<_Iter1> _Iter2>
 _LIBCPP_HIDE_FROM_ABI constexpr
 compare_three_way_result_t<_Iter1, _Iter2>
@@ -289,7 +289,7 @@
 {
     return __y.base() <=> __x.base();
 }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #ifndef _LIBCPP_CXX03_LANG
 template <class _Iter1, class _Iter2>
@@ -318,13 +318,13 @@
     return reverse_iterator<_Iter>(__x.base() - __n);
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Iter1, class _Iter2>
   requires (!sized_sentinel_for<_Iter1, _Iter2>)
 inline constexpr bool disable_sized_sentinel_for<reverse_iterator<_Iter1>, reverse_iterator<_Iter2>> = true;
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Iter>
 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
 reverse_iterator<_Iter> make_reverse_iterator(_Iter __i)
@@ -498,7 +498,7 @@
   }
 };
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <ranges::bidirectional_range _Range>
 _LIBCPP_HIDE_FROM_ABI constexpr ranges::
     subrange<reverse_iterator<ranges::iterator_t<_Range>>, reverse_iterator<ranges::iterator_t<_Range>>>
@@ -512,7 +512,7 @@
 struct __unwrap_iter_impl<reverse_iterator<reverse_iterator<_Iter> >, __b>
     : __unwrap_reverse_iter_impl<reverse_iterator, reverse_iterator, _Iter> {};
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class _Iter, bool __b>
 struct __unwrap_iter_impl<reverse_iterator<__unconstrained_reverse_iterator<_Iter>>, __b>
@@ -526,7 +526,7 @@
 struct __unwrap_iter_impl<__unconstrained_reverse_iterator<__unconstrained_reverse_iterator<_Iter>>, __b>
     : __unwrap_reverse_iter_impl<__unconstrained_reverse_iterator, __unconstrained_reverse_iterator, _Iter> {};
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/size.h b/libcxx/include/__iterator/size.h
--- a/libcxx/include/__iterator/size.h
+++ b/libcxx/include/__iterator/size.h
@@ -21,7 +21,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 template <class _Cont>
 _LIBCPP_INLINE_VISIBILITY
@@ -34,7 +34,7 @@
 _LIBCPP_INLINE_VISIBILITY
 constexpr size_t size(const _Tp (&)[_Sz]) noexcept { return _Sz; }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Cont>
 _LIBCPP_INLINE_VISIBILITY
 constexpr auto ssize(const _Cont& __c)
@@ -52,7 +52,7 @@
 _LIBCPP_DIAGNOSTIC_POP
 #endif
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/sortable.h b/libcxx/include/__iterator/sortable.h
--- a/libcxx/include/__iterator/sortable.h
+++ b/libcxx/include/__iterator/sortable.h
@@ -23,14 +23,14 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class _Iter, class _Comp = ranges::less, class _Proj = identity>
 concept sortable =
   permutable<_Iter> &&
   indirect_strict_weak_order<_Comp, projected<_Iter, _Proj>>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/unreachable_sentinel.h b/libcxx/include/__iterator/unreachable_sentinel.h
--- a/libcxx/include/__iterator/unreachable_sentinel.h
+++ b/libcxx/include/__iterator/unreachable_sentinel.h
@@ -19,7 +19,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 struct unreachable_sentinel_t {
   template<weakly_incrementable _Iter>
@@ -31,7 +31,7 @@
 
 inline constexpr unreachable_sentinel_t unreachable_sentinel{};
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__iterator/wrap_iter.h b/libcxx/include/__iterator/wrap_iter.h
--- a/libcxx/include/__iterator/wrap_iter.h
+++ b/libcxx/include/__iterator/wrap_iter.h
@@ -34,7 +34,7 @@
     typedef typename iterator_traits<iterator_type>::pointer           pointer;
     typedef typename iterator_traits<iterator_type>::reference         reference;
     typedef typename iterator_traits<iterator_type>::iterator_category iterator_category;
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     typedef contiguous_iterator_tag                                    iterator_concept;
 #endif
 
diff --git a/libcxx/include/__memory/aligned_alloc.h b/libcxx/include/__memory/aligned_alloc.h
--- a/libcxx/include/__memory/aligned_alloc.h
+++ b/libcxx/include/__memory/aligned_alloc.h
@@ -31,7 +31,7 @@
 void* __libcpp_aligned_alloc(std::size_t __alignment, std::size_t __size) {
 #  if defined(_LIBCPP_MSVCRT_LIKE)
     return ::_aligned_malloc(__size, __alignment);
-#  elif _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_C11_ALIGNED_ALLOC)
+#  elif _LIBCPP_STD_VER >= 17 && !defined(_LIBCPP_HAS_NO_C11_ALIGNED_ALLOC)
     // aligned_alloc() requires that __size is a multiple of __alignment,
     // but for C++ [new.delete.general], only states "if the value of an
     // alignment argument passed to any of these functions is not a valid
diff --git a/libcxx/include/__memory/allocate_at_least.h b/libcxx/include/__memory/allocate_at_least.h
--- a/libcxx/include/__memory/allocate_at_least.h
+++ b/libcxx/include/__memory/allocate_at_least.h
@@ -19,7 +19,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
 template <class _Pointer>
 struct allocation_result {
   _Pointer ptr;
@@ -55,7 +55,7 @@
   return {__alloc.allocate(__n), __n};
 }
 
-#endif // _LIBCPP_STD_VER > 20
+#endif // _LIBCPP_STD_VER >= 23
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__memory/allocator.h b/libcxx/include/__memory/allocator.h
--- a/libcxx/include/__memory/allocator.h
+++ b/libcxx/include/__memory/allocator.h
@@ -116,7 +116,7 @@
         }
     }
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
     [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr
     allocation_result<_Tp*> allocate_at_least(size_t __n) {
         return {allocate(__n), __n};
@@ -205,7 +205,7 @@
         }
     }
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
     [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr
     allocation_result<const _Tp*> allocate_at_least(size_t __n) {
         return {allocate(__n), __n};
diff --git a/libcxx/include/__memory/allocator_traits.h b/libcxx/include/__memory/allocator_traits.h
--- a/libcxx/include/__memory/allocator_traits.h
+++ b/libcxx/include/__memory/allocator_traits.h
@@ -300,7 +300,7 @@
         __enable_if_t<!__has_construct<allocator_type, _Tp*, _Args...>::value> >
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
     static void construct(allocator_type&, _Tp* __p, _Args&&... __args) {
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
         _VSTD::construct_at(__p, _VSTD::forward<_Args>(__args)...);
 #else
         ::new ((void*)__p) _Tp(_VSTD::forward<_Args>(__args)...);
@@ -319,7 +319,7 @@
         __enable_if_t<!__has_destroy<allocator_type, _Tp*>::value> >
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
     static void destroy(allocator_type&, _Tp* __p) {
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
         _VSTD::destroy_at(__p);
 #else
         __p->~_Tp();
diff --git a/libcxx/include/__memory/assume_aligned.h b/libcxx/include/__memory/assume_aligned.h
--- a/libcxx/include/__memory/assume_aligned.h
+++ b/libcxx/include/__memory/assume_aligned.h
@@ -22,7 +22,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <size_t _Np, class _Tp>
 [[nodiscard]]
@@ -39,7 +39,7 @@
   }
 }
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__memory/concepts.h b/libcxx/include/__memory/concepts.h
--- a/libcxx/include/__memory/concepts.h
+++ b/libcxx/include/__memory/concepts.h
@@ -26,7 +26,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
 
@@ -62,7 +62,7 @@
 
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__memory/construct_at.h b/libcxx/include/__memory/construct_at.h
--- a/libcxx/include/__memory/construct_at.h
+++ b/libcxx/include/__memory/construct_at.h
@@ -30,7 +30,7 @@
 
 // construct_at
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class _Tp, class... _Args, class = decltype(::new(std::declval<void*>()) _Tp(std::declval<_Args>()...))>
 _LIBCPP_HIDE_FROM_ABI constexpr _Tp* construct_at(_Tp* __location, _Args&&... __args) {
@@ -42,7 +42,7 @@
 
 template <class _Tp, class... _Args, class = decltype(::new(std::declval<void*>()) _Tp(std::declval<_Args>()...))>
 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _Tp* __construct_at(_Tp* __location, _Args&&... __args) {
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
   return std::construct_at(__location, std::forward<_Args>(__args)...);
 #else
   return _LIBCPP_ASSERT(__location != nullptr, "null pointer given to construct_at"),
@@ -66,7 +66,7 @@
     __loc->~_Tp();
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Tp, typename enable_if<is_array<_Tp>::value, int>::type = 0>
 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
 void __destroy_at(_Tp* __loc) {
@@ -93,7 +93,7 @@
     return __last;
 }
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 template <class _Tp, enable_if_t<!is_array_v<_Tp>, int> = 0>
 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
@@ -101,7 +101,7 @@
     std::__destroy_at(__loc);
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Tp, enable_if_t<is_array_v<_Tp>, int> = 0>
 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
 void destroy_at(_Tp* __loc) {
@@ -123,7 +123,7 @@
     return __first;
 }
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__memory/pointer_traits.h b/libcxx/include/__memory/pointer_traits.h
--- a/libcxx/include/__memory/pointer_traits.h
+++ b/libcxx/include/__memory/pointer_traits.h
@@ -223,7 +223,7 @@
     }
 };
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Tp>
 inline _LIBCPP_INLINE_VISIBILITY constexpr
 auto to_address(_Tp *__p) noexcept {
diff --git a/libcxx/include/__memory/ranges_construct_at.h b/libcxx/include/__memory/ranges_construct_at.h
--- a/libcxx/include/__memory/ranges_construct_at.h
+++ b/libcxx/include/__memory/ranges_construct_at.h
@@ -30,7 +30,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 namespace ranges {
 
 // construct_at
@@ -118,7 +118,7 @@
 
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__memory/ranges_uninitialized_algorithms.h b/libcxx/include/__memory/ranges_uninitialized_algorithms.h
--- a/libcxx/include/__memory/ranges_uninitialized_algorithms.h
+++ b/libcxx/include/__memory/ranges_uninitialized_algorithms.h
@@ -33,7 +33,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
 
@@ -312,7 +312,7 @@
 
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__memory/raw_storage_iterator.h b/libcxx/include/__memory/raw_storage_iterator.h
--- a/libcxx/include/__memory/raw_storage_iterator.h
+++ b/libcxx/include/__memory/raw_storage_iterator.h
@@ -39,7 +39,7 @@
 public:
     typedef output_iterator_tag iterator_category;
     typedef void                value_type;
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     typedef ptrdiff_t           difference_type;
 #else
     typedef void                difference_type;
diff --git a/libcxx/include/__memory/shared_ptr.h b/libcxx/include/__memory/shared_ptr.h
--- a/libcxx/include/__memory/shared_ptr.h
+++ b/libcxx/include/__memory/shared_ptr.h
@@ -296,7 +296,7 @@
 
 private:
     void __on_zero_shared() _NOEXCEPT override {
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
         if constexpr (is_same_v<typename _Alloc::value_type, __for_overwrite_tag>) {
             __get_elem()->~_Tp();
         } else {
@@ -459,7 +459,7 @@
 class _LIBCPP_SHARED_PTR_TRIVIAL_ABI _LIBCPP_TEMPLATE_VIS shared_ptr
 {
 public:
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     typedef weak_ptr<_Tp> weak_type;
     typedef remove_extent_t<_Tp> element_type;
 #else
@@ -699,7 +699,7 @@
     shared_ptr(unique_ptr<_Yp, _Dp>&& __r)
         : __ptr_(__r.get())
     {
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
         if (__ptr_ == nullptr)
             __cntrl_ = nullptr;
         else
@@ -722,7 +722,7 @@
     shared_ptr(unique_ptr<_Yp, _Dp>&& __r)
         : __ptr_(__r.get())
     {
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
         if (__ptr_ == nullptr)
             __cntrl_ = nullptr;
         else
@@ -895,7 +895,7 @@
         return __cntrl_ == __p.__cntrl_;
     }
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     _LIBCPP_HIDE_FROM_ABI
     __add_lvalue_reference_t<element_type> operator[](ptrdiff_t __i) const
     {
@@ -975,7 +975,7 @@
     template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr;
 };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template<class _Tp>
 shared_ptr(weak_ptr<_Tp>) -> shared_ptr<_Tp>;
 template<class _Tp, class _Dp>
@@ -1024,7 +1024,7 @@
 
 #endif // _LIBCPP_STD_VER >= 20
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 template <size_t _Alignment>
 struct __sp_aligned_storage {
@@ -1214,9 +1214,9 @@
     return shared_ptr<_Array>::__create_with_control_block(__control_block->__get_data(), __control_block);
 }
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // bounded array variants
 template<class _Tp, class _Alloc, class = __enable_if_t<is_bounded_array<_Tp>::value>>
@@ -1308,7 +1308,7 @@
     return std::__allocate_shared_unbounded_array<_Tp>(allocator<__for_overwrite_tag>(), __n);
 }
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 template<class _Tp, class _Up>
 inline _LIBCPP_INLINE_VISIBILITY
@@ -1368,7 +1368,7 @@
 
 #endif // _LIBCPP_STD_VER <= 17
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template<class _Tp, class _Up>
 _LIBCPP_HIDE_FROM_ABI strong_ordering
 operator<=>(shared_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) noexcept
@@ -1477,7 +1477,7 @@
 
 #endif // _LIBCPP_STD_VER <= 17
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template<class _Tp>
 _LIBCPP_HIDE_FROM_ABI strong_ordering
 operator<=>(shared_ptr<_Tp> const& __x, nullptr_t) noexcept
@@ -1547,7 +1547,7 @@
 class _LIBCPP_SHARED_PTR_TRIVIAL_ABI _LIBCPP_TEMPLATE_VIS weak_ptr
 {
 public:
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     typedef remove_extent_t<_Tp> element_type;
 #else
     typedef _Tp element_type;
@@ -1632,7 +1632,7 @@
     template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr;
 };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template<class _Tp>
 weak_ptr(shared_ptr<_Tp>) -> weak_ptr<_Tp>;
 #endif
@@ -1808,7 +1808,7 @@
     return __r;
 }
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp = void> struct owner_less;
 #else
 template <class _Tp> struct owner_less;
@@ -1845,7 +1845,7 @@
         {return __x.owner_before(__y);}
 };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <>
 struct _LIBCPP_TEMPLATE_VIS owner_less<void>
 {
@@ -1891,7 +1891,7 @@
     shared_ptr<_Tp const> shared_from_this() const
         {return shared_ptr<const _Tp>(__weak_this_);}
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     _LIBCPP_INLINE_VISIBILITY
     weak_ptr<_Tp> weak_from_this() _NOEXCEPT
        { return __weak_this_; }
@@ -1899,7 +1899,7 @@
     _LIBCPP_INLINE_VISIBILITY
     weak_ptr<const _Tp> weak_from_this() const _NOEXCEPT
         { return __weak_this_; }
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
     template <class _Up> friend class shared_ptr;
 };
diff --git a/libcxx/include/__memory/swap_allocator.h b/libcxx/include/__memory/swap_allocator.h
--- a/libcxx/include/__memory/swap_allocator.h
+++ b/libcxx/include/__memory/swap_allocator.h
@@ -23,7 +23,7 @@
 
 template <typename _Alloc>
 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 void __swap_allocator(_Alloc& __a1, _Alloc& __a2, true_type)
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     _NOEXCEPT
 #else
     _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value)
@@ -39,7 +39,7 @@
 
 template <typename _Alloc>
 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 void __swap_allocator(_Alloc& __a1, _Alloc& __a2)
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     _NOEXCEPT
 #else
     _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value)
diff --git a/libcxx/include/__memory/uninitialized_algorithms.h b/libcxx/include/__memory/uninitialized_algorithms.h
--- a/libcxx/include/__memory/uninitialized_algorithms.h
+++ b/libcxx/include/__memory/uninitialized_algorithms.h
@@ -180,7 +180,7 @@
     return _VSTD::__uninitialized_fill_n<_ValueType>(__first, __n, __x);
 }
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 // uninitialized_default_construct
 
@@ -512,7 +512,7 @@
     __guard.__complete();
 }
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 // Destroy all elements in [__first, __last) from left to right using allocator destruction.
 template <class _Alloc, class _Iter, class _Sent>
diff --git a/libcxx/include/__memory/unique_ptr.h b/libcxx/include/__memory/unique_ptr.h
--- a/libcxx/include/__memory/unique_ptr.h
+++ b/libcxx/include/__memory/unique_ptr.h
@@ -556,7 +556,7 @@
 operator>=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x < __y);}
 
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _T1, class _D1, class _T2, class _D2>
 requires three_way_comparable_with<typename unique_ptr<_T1, _D1>::pointer,
                                    typename unique_ptr<_T2, _D2>::pointer>
@@ -650,7 +650,7 @@
   return !(nullptr < __x);
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _T1, class _D1>
   requires three_way_comparable<
       typename unique_ptr<_T1, _D1>::pointer> _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
@@ -660,7 +660,7 @@
 }
 #endif
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 
 template<class _Tp>
 struct __unique_if
@@ -697,7 +697,7 @@
     typename __unique_if<_Tp>::__unique_array_known_bound
     make_unique(_Args&&...) = delete;
 
-#endif // _LIBCPP_STD_VER > 11
+#endif // _LIBCPP_STD_VER >= 14
 
 #if _LIBCPP_STD_VER >= 20
 
diff --git a/libcxx/include/__memory/uses_allocator.h b/libcxx/include/__memory/uses_allocator.h
--- a/libcxx/include/__memory/uses_allocator.h
+++ b/libcxx/include/__memory/uses_allocator.h
@@ -49,7 +49,7 @@
 {
 };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp, class _Alloc>
 inline constexpr size_t uses_allocator_v = uses_allocator<_Tp, _Alloc>::value;
 #endif
diff --git a/libcxx/include/__memory/uses_allocator_construction.h b/libcxx/include/__memory/uses_allocator_construction.h
--- a/libcxx/include/__memory/uses_allocator_construction.h
+++ b/libcxx/include/__memory/uses_allocator_construction.h
@@ -83,7 +83,7 @@
       std::forward_as_tuple(std::forward<_Vp>(__v)));
 }
 
-#  if _LIBCPP_STD_VER > 20
+#  if _LIBCPP_STD_VER >= 23
 template <class _Pair, class _Alloc, class _Up, class _Vp, __enable_if_t<__is_std_pair<_Pair>, int> = 0>
 _LIBCPP_HIDE_FROM_ABI constexpr auto
 __uses_allocator_construction_args(const _Alloc& __alloc, pair<_Up, _Vp>& __pair) noexcept {
@@ -109,7 +109,7 @@
       std::forward_as_tuple(std::get<1>(std::move(__pair))));
 }
 
-#  if _LIBCPP_STD_VER > 20
+#  if _LIBCPP_STD_VER >= 23
 template <class _Pair, class _Alloc, class _Up, class _Vp, __enable_if_t<__is_std_pair<_Pair>, int> = 0>
 _LIBCPP_HIDE_FROM_ABI constexpr auto
 __uses_allocator_construction_args(const _Alloc& __alloc, const pair<_Up, _Vp>&& __pair) noexcept {
diff --git a/libcxx/include/__memory_resource/memory_resource.h b/libcxx/include/__memory_resource/memory_resource.h
--- a/libcxx/include/__memory_resource/memory_resource.h
+++ b/libcxx/include/__memory_resource/memory_resource.h
@@ -16,7 +16,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -70,6 +70,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 #endif // _LIBCPP___MEMORY_RESOURCE_MEMORY_RESOURCE_H
diff --git a/libcxx/include/__memory_resource/monotonic_buffer_resource.h b/libcxx/include/__memory_resource/monotonic_buffer_resource.h
--- a/libcxx/include/__memory_resource/monotonic_buffer_resource.h
+++ b/libcxx/include/__memory_resource/monotonic_buffer_resource.h
@@ -18,7 +18,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -115,6 +115,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 #endif // _LIBCPP___MEMORY_RESOURCE_MONOTONIC_BUFFER_RESOURCE_H
diff --git a/libcxx/include/__memory_resource/polymorphic_allocator.h b/libcxx/include/__memory_resource/polymorphic_allocator.h
--- a/libcxx/include/__memory_resource/polymorphic_allocator.h
+++ b/libcxx/include/__memory_resource/polymorphic_allocator.h
@@ -26,7 +26,7 @@
 _LIBCPP_PUSH_MACROS
 #include <__undef_macros>
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -217,7 +217,7 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_POP_MACROS
 
diff --git a/libcxx/include/__memory_resource/pool_options.h b/libcxx/include/__memory_resource/pool_options.h
--- a/libcxx/include/__memory_resource/pool_options.h
+++ b/libcxx/include/__memory_resource/pool_options.h
@@ -16,7 +16,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -33,6 +33,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 #endif // _LIBCPP___MEMORY_RESOURCE_POOL_OPTIONS_H
diff --git a/libcxx/include/__memory_resource/synchronized_pool_resource.h b/libcxx/include/__memory_resource/synchronized_pool_resource.h
--- a/libcxx/include/__memory_resource/synchronized_pool_resource.h
+++ b/libcxx/include/__memory_resource/synchronized_pool_resource.h
@@ -22,7 +22,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -89,6 +89,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 #endif // _LIBCPP___MEMORY_RESOURCE_SYNCHRONIZED_POOL_RESOURCE_H
diff --git a/libcxx/include/__memory_resource/unsynchronized_pool_resource.h b/libcxx/include/__memory_resource/unsynchronized_pool_resource.h
--- a/libcxx/include/__memory_resource/unsynchronized_pool_resource.h
+++ b/libcxx/include/__memory_resource/unsynchronized_pool_resource.h
@@ -19,7 +19,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -101,6 +101,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 #endif // _LIBCPP___MEMORY_RESOURCE_UNSYNCHRONIZED_POOL_RESOURCE_H
diff --git a/libcxx/include/__node_handle b/libcxx/include/__node_handle
--- a/libcxx/include/__node_handle
+++ b/libcxx/include/__node_handle
@@ -70,7 +70,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 // Specialized in __tree & __hash_table for their _NodeType.
 template <class _NodeType, class _Alloc>
@@ -247,7 +247,7 @@
     _NodeType node;
 };
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__numeric/accumulate.h b/libcxx/include/__numeric/accumulate.h
--- a/libcxx/include/__numeric/accumulate.h
+++ b/libcxx/include/__numeric/accumulate.h
@@ -25,7 +25,7 @@
 accumulate(_InputIterator __first, _InputIterator __last, _Tp __init)
 {
     for (; __first != __last; ++__first)
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
         __init = _VSTD::move(__init) + *__first;
 #else
         __init = __init + *__first;
@@ -39,7 +39,7 @@
 accumulate(_InputIterator __first, _InputIterator __last, _Tp __init, _BinaryOperation __binary_op)
 {
     for (; __first != __last; ++__first)
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
         __init = __binary_op(_VSTD::move(__init), *__first);
 #else
         __init = __binary_op(__init, *__first);
diff --git a/libcxx/include/__numeric/adjacent_difference.h b/libcxx/include/__numeric/adjacent_difference.h
--- a/libcxx/include/__numeric/adjacent_difference.h
+++ b/libcxx/include/__numeric/adjacent_difference.h
@@ -32,7 +32,7 @@
         for (++__first, (void) ++__result; __first != __last; ++__first, (void) ++__result)
         {
             typename iterator_traits<_InputIterator>::value_type __val(*__first);
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
             *__result = __val - _VSTD::move(__acc);
 #else
             *__result = __val - __acc;
@@ -56,7 +56,7 @@
         for (++__first, (void) ++__result; __first != __last; ++__first, (void) ++__result)
         {
             typename iterator_traits<_InputIterator>::value_type __val(*__first);
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
             *__result = __binary_op(__val, _VSTD::move(__acc));
 #else
             *__result = __binary_op(__val, __acc);
diff --git a/libcxx/include/__numeric/exclusive_scan.h b/libcxx/include/__numeric/exclusive_scan.h
--- a/libcxx/include/__numeric/exclusive_scan.h
+++ b/libcxx/include/__numeric/exclusive_scan.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 template <class _InputIterator, class _OutputIterator, class _Tp, class _BinaryOp>
 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator
@@ -46,7 +46,7 @@
   return _VSTD::exclusive_scan(__first, __last, __result, __init, _VSTD::plus<>());
 }
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__numeric/gcd_lcm.h b/libcxx/include/__numeric/gcd_lcm.h
--- a/libcxx/include/__numeric/gcd_lcm.h
+++ b/libcxx/include/__numeric/gcd_lcm.h
@@ -28,7 +28,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 template <typename _Result, typename _Source, bool _IsSigned = is_signed<_Source>::value> struct __ct_abs;
 
diff --git a/libcxx/include/__numeric/inclusive_scan.h b/libcxx/include/__numeric/inclusive_scan.h
--- a/libcxx/include/__numeric/inclusive_scan.h
+++ b/libcxx/include/__numeric/inclusive_scan.h
@@ -21,7 +21,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 template <class _InputIterator, class _OutputIterator, class _Tp, class _BinaryOp>
 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator
@@ -53,7 +53,7 @@
   return _VSTD::inclusive_scan(__first, __last, __result, _VSTD::plus<>());
 }
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__numeric/inner_product.h b/libcxx/include/__numeric/inner_product.h
--- a/libcxx/include/__numeric/inner_product.h
+++ b/libcxx/include/__numeric/inner_product.h
@@ -25,7 +25,7 @@
 inner_product(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _Tp __init)
 {
     for (; __first1 != __last1; ++__first1, (void) ++__first2)
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
         __init = _VSTD::move(__init) + *__first1 * *__first2;
 #else
         __init = __init + *__first1 * *__first2;
@@ -40,7 +40,7 @@
               _Tp __init, _BinaryOperation1 __binary_op1, _BinaryOperation2 __binary_op2)
 {
     for (; __first1 != __last1; ++__first1, (void) ++__first2)
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
         __init = __binary_op1(_VSTD::move(__init), __binary_op2(*__first1, *__first2));
 #else
         __init = __binary_op1(__init, __binary_op2(*__first1, *__first2));
diff --git a/libcxx/include/__numeric/midpoint.h b/libcxx/include/__numeric/midpoint.h
--- a/libcxx/include/__numeric/midpoint.h
+++ b/libcxx/include/__numeric/midpoint.h
@@ -33,7 +33,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Tp>
 _LIBCPP_INLINE_VISIBILITY constexpr
 enable_if_t<is_integral_v<_Tp> && !is_same_v<bool, _Tp> && !is_null_pointer_v<_Tp>, _Tp>
@@ -86,7 +86,7 @@
       __a/2 + __b/2;                                         // otherwise correctly rounded
 }
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__numeric/partial_sum.h b/libcxx/include/__numeric/partial_sum.h
--- a/libcxx/include/__numeric/partial_sum.h
+++ b/libcxx/include/__numeric/partial_sum.h
@@ -31,7 +31,7 @@
         *__result = __t;
         for (++__first, (void) ++__result; __first != __last; ++__first, (void) ++__result)
         {
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
             __t = _VSTD::move(__t) + *__first;
 #else
             __t = __t + *__first;
@@ -54,7 +54,7 @@
         *__result = __t;
         for (++__first, (void) ++__result; __first != __last; ++__first, (void) ++__result)
         {
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
             __t = __binary_op(_VSTD::move(__t), *__first);
 #else
             __t = __binary_op(__t, *__first);
diff --git a/libcxx/include/__numeric/reduce.h b/libcxx/include/__numeric/reduce.h
--- a/libcxx/include/__numeric/reduce.h
+++ b/libcxx/include/__numeric/reduce.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _InputIterator, class _Tp, class _BinaryOp>
 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 _Tp reduce(_InputIterator __first, _InputIterator __last,
                                                                    _Tp __init, _BinaryOp __b) {
diff --git a/libcxx/include/__numeric/transform_exclusive_scan.h b/libcxx/include/__numeric/transform_exclusive_scan.h
--- a/libcxx/include/__numeric/transform_exclusive_scan.h
+++ b/libcxx/include/__numeric/transform_exclusive_scan.h
@@ -18,7 +18,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 template <class _InputIterator, class _OutputIterator, class _Tp,
           class _BinaryOp, class _UnaryOp>
@@ -42,7 +42,7 @@
     return __result;
 }
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__numeric/transform_inclusive_scan.h b/libcxx/include/__numeric/transform_inclusive_scan.h
--- a/libcxx/include/__numeric/transform_inclusive_scan.h
+++ b/libcxx/include/__numeric/transform_inclusive_scan.h
@@ -19,7 +19,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 template <class _InputIterator, class _OutputIterator, class _Tp, class _BinaryOp, class _UnaryOp>
 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
@@ -51,7 +51,7 @@
     return __result;
 }
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__numeric/transform_reduce.h b/libcxx/include/__numeric/transform_reduce.h
--- a/libcxx/include/__numeric/transform_reduce.h
+++ b/libcxx/include/__numeric/transform_reduce.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _InputIterator, class _Tp, class _BinaryOp, class _UnaryOp>
 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 _Tp transform_reduce(_InputIterator __first,
                                                                              _InputIterator __last, _Tp __init,
diff --git a/libcxx/include/__random/uniform_random_bit_generator.h b/libcxx/include/__random/uniform_random_bit_generator.h
--- a/libcxx/include/__random/uniform_random_bit_generator.h
+++ b/libcxx/include/__random/uniform_random_bit_generator.h
@@ -25,7 +25,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [rand.req.urng]
 template<class _Gen>
@@ -37,7 +37,7 @@
     requires bool_constant<(_Gen::min() < _Gen::max())>::value;
   };
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/access.h b/libcxx/include/__ranges/access.h
--- a/libcxx/include/__ranges/access.h
+++ b/libcxx/include/__ranges/access.h
@@ -29,7 +29,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
   template <class _Tp>
@@ -223,7 +223,7 @@
 } // namespace __cpo
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/all.h b/libcxx/include/__ranges/all.h
--- a/libcxx/include/__ranges/all.h
+++ b/libcxx/include/__ranges/all.h
@@ -29,7 +29,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges::views {
 
@@ -77,7 +77,7 @@
 
 } // namespace ranges::views
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/common_view.h b/libcxx/include/__ranges/common_view.h
--- a/libcxx/include/__ranges/common_view.h
+++ b/libcxx/include/__ranges/common_view.h
@@ -32,7 +32,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
 
@@ -130,7 +130,7 @@
 } // namespace views
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/concepts.h b/libcxx/include/__ranges/concepts.h
--- a/libcxx/include/__ranges/concepts.h
+++ b/libcxx/include/__ranges/concepts.h
@@ -37,7 +37,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
 
@@ -140,7 +140,7 @@
 
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/copyable_box.h b/libcxx/include/__ranges/copyable_box.h
--- a/libcxx/include/__ranges/copyable_box.h
+++ b/libcxx/include/__ranges/copyable_box.h
@@ -26,7 +26,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // __copyable_box allows turning a type that is copy-constructible (but maybe not copy-assignable) into
 // a type that is both copy-constructible and copy-assignable. It does that by introducing an empty state
@@ -173,7 +173,7 @@
   };
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/counted.h b/libcxx/include/__ranges/counted.h
--- a/libcxx/include/__ranges/counted.h
+++ b/libcxx/include/__ranges/counted.h
@@ -30,7 +30,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges::views {
 
@@ -75,7 +75,7 @@
 
 } // namespace ranges::views
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/dangling.h b/libcxx/include/__ranges/dangling.h
--- a/libcxx/include/__ranges/dangling.h
+++ b/libcxx/include/__ranges/dangling.h
@@ -21,7 +21,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
 struct dangling {
@@ -35,7 +35,7 @@
 // borrowed_subrange_t defined in <__ranges/subrange.h>
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/data.h b/libcxx/include/__ranges/data.h
--- a/libcxx/include/__ranges/data.h
+++ b/libcxx/include/__ranges/data.h
@@ -30,7 +30,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [range.prim.data]
 
@@ -105,7 +105,7 @@
 } // namespace __cpo
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/drop_view.h b/libcxx/include/__ranges/drop_view.h
--- a/libcxx/include/__ranges/drop_view.h
+++ b/libcxx/include/__ranges/drop_view.h
@@ -47,7 +47,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
   template<view _View>
@@ -299,7 +299,7 @@
 
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/empty.h b/libcxx/include/__ranges/empty.h
--- a/libcxx/include/__ranges/empty.h
+++ b/libcxx/include/__ranges/empty.h
@@ -22,7 +22,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [range.prim.empty]
 
@@ -75,7 +75,7 @@
 } // namespace __cpo
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/empty_view.h b/libcxx/include/__ranges/empty_view.h
--- a/libcxx/include/__ranges/empty_view.h
+++ b/libcxx/include/__ranges/empty_view.h
@@ -21,7 +21,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
   template<class _Tp>
@@ -46,7 +46,7 @@
   } // namespace views
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/enable_borrowed_range.h b/libcxx/include/__ranges/enable_borrowed_range.h
--- a/libcxx/include/__ranges/enable_borrowed_range.h
+++ b/libcxx/include/__ranges/enable_borrowed_range.h
@@ -22,7 +22,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
 
@@ -33,7 +33,7 @@
 
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/enable_view.h b/libcxx/include/__ranges/enable_view.h
--- a/libcxx/include/__ranges/enable_view.h
+++ b/libcxx/include/__ranges/enable_view.h
@@ -23,7 +23,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
 
@@ -43,7 +43,7 @@
 
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/filter_view.h b/libcxx/include/__ranges/filter_view.h
--- a/libcxx/include/__ranges/filter_view.h
+++ b/libcxx/include/__ranges/filter_view.h
@@ -43,7 +43,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
   template<input_range _View, indirect_unary_predicate<iterator_t<_View>> _Pred>
@@ -257,7 +257,7 @@
 
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/iota_view.h b/libcxx/include/__ranges/iota_view.h
--- a/libcxx/include/__ranges/iota_view.h
+++ b/libcxx/include/__ranges/iota_view.h
@@ -40,7 +40,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
   template<class _Int>
@@ -403,7 +403,7 @@
 } // namespace views
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/join_view.h b/libcxx/include/__ranges/join_view.h
--- a/libcxx/include/__ranges/join_view.h
+++ b/libcxx/include/__ranges/join_view.h
@@ -43,7 +43,7 @@
 // Note: `join_view` is still marked experimental because there is an ABI-breaking change that affects `join_view` in
 // the pipeline (https://isocpp.org/files/papers/D2770R0.html).
 // TODO: make `join_view` non-experimental once D2770 is implemented.
-#if _LIBCPP_STD_VER > 17 && defined(_LIBCPP_ENABLE_EXPERIMENTAL)
+#if _LIBCPP_STD_VER >= 20 && defined(_LIBCPP_ENABLE_EXPERIMENTAL)
 
 namespace ranges {
   template<class>
@@ -435,7 +435,7 @@
   }
 };
 
-#endif // #if _LIBCPP_STD_VER > 17 && defined(_LIBCPP_ENABLE_EXPERIMENTAL)
+#endif // #if _LIBCPP_STD_VER >= 20 && defined(_LIBCPP_ENABLE_EXPERIMENTAL)
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/lazy_split_view.h b/libcxx/include/__ranges/lazy_split_view.h
--- a/libcxx/include/__ranges/lazy_split_view.h
+++ b/libcxx/include/__ranges/lazy_split_view.h
@@ -45,7 +45,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
 
@@ -458,7 +458,7 @@
 
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/non_propagating_cache.h b/libcxx/include/__ranges/non_propagating_cache.h
--- a/libcxx/include/__ranges/non_propagating_cache.h
+++ b/libcxx/include/__ranges/non_propagating_cache.h
@@ -24,7 +24,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
   // __non_propagating_cache is a helper type that allows storing an optional value in it,
@@ -107,7 +107,7 @@
   struct __empty_cache { };
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/owning_view.h b/libcxx/include/__ranges/owning_view.h
--- a/libcxx/include/__ranges/owning_view.h
+++ b/libcxx/include/__ranges/owning_view.h
@@ -29,7 +29,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
   template<range _Rp>
@@ -76,7 +76,7 @@
 
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/range_adaptor.h b/libcxx/include/__ranges/range_adaptor.h
--- a/libcxx/include/__ranges/range_adaptor.h
+++ b/libcxx/include/__ranges/range_adaptor.h
@@ -28,7 +28,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // CRTP base that one can derive from in order to be considered a range adaptor closure
 // by the library. When deriving from this class, a pipe operator will be provided to
@@ -70,7 +70,7 @@
     { return __range_adaptor_closure_t(std::__compose(std::forward<_OtherClosure>(__c2), std::forward<_Closure>(__c1))); }
 };
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/rbegin.h b/libcxx/include/__ranges/rbegin.h
--- a/libcxx/include/__ranges/rbegin.h
+++ b/libcxx/include/__ranges/rbegin.h
@@ -26,7 +26,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [ranges.access.rbegin]
 
@@ -124,7 +124,7 @@
 } // namespace __cpo
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/ref_view.h b/libcxx/include/__ranges/ref_view.h
--- a/libcxx/include/__ranges/ref_view.h
+++ b/libcxx/include/__ranges/ref_view.h
@@ -33,7 +33,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
   template<range _Range>
@@ -81,7 +81,7 @@
   inline constexpr bool enable_borrowed_range<ref_view<_Tp>> = true;
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/rend.h b/libcxx/include/__ranges/rend.h
--- a/libcxx/include/__ranges/rend.h
+++ b/libcxx/include/__ranges/rend.h
@@ -27,7 +27,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // [range.access.rend]
 
@@ -128,7 +128,7 @@
 } // namespace __cpo
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/reverse_view.h b/libcxx/include/__ranges/reverse_view.h
--- a/libcxx/include/__ranges/reverse_view.h
+++ b/libcxx/include/__ranges/reverse_view.h
@@ -34,7 +34,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
   template<view _View>
@@ -184,7 +184,7 @@
   } // namespace views
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/single_view.h b/libcxx/include/__ranges/single_view.h
--- a/libcxx/include/__ranges/single_view.h
+++ b/libcxx/include/__ranges/single_view.h
@@ -26,7 +26,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
   template<copy_constructible _Tp>
@@ -95,7 +95,7 @@
 } // namespace views
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/size.h b/libcxx/include/__ranges/size.h
--- a/libcxx/include/__ranges/size.h
+++ b/libcxx/include/__ranges/size.h
@@ -30,7 +30,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
   template<class>
@@ -141,7 +141,7 @@
 } // namespace __cpo
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/subrange.h b/libcxx/include/__ranges/subrange.h
--- a/libcxx/include/__ranges/subrange.h
+++ b/libcxx/include/__ranges/subrange.h
@@ -48,7 +48,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
   template<class _From, class _To>
@@ -284,7 +284,7 @@
   using type = _Sp;
 };
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/take_view.h b/libcxx/include/__ranges/take_view.h
--- a/libcxx/include/__ranges/take_view.h
+++ b/libcxx/include/__ranges/take_view.h
@@ -49,7 +49,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
 
@@ -334,7 +334,7 @@
 
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/transform_view.h b/libcxx/include/__ranges/transform_view.h
--- a/libcxx/include/__ranges/transform_view.h
+++ b/libcxx/include/__ranges/transform_view.h
@@ -43,7 +43,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
 
@@ -435,7 +435,7 @@
 
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/view_interface.h b/libcxx/include/__ranges/view_interface.h
--- a/libcxx/include/__ranges/view_interface.h
+++ b/libcxx/include/__ranges/view_interface.h
@@ -31,7 +31,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
 
@@ -170,7 +170,7 @@
 
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/views.h b/libcxx/include/__ranges/views.h
--- a/libcxx/include/__ranges/views.h
+++ b/libcxx/include/__ranges/views.h
@@ -18,7 +18,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace ranges {
 
@@ -28,7 +28,7 @@
 
 namespace views = ranges::views;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__ranges/zip_view.h b/libcxx/include/__ranges/zip_view.h
--- a/libcxx/include/__ranges/zip_view.h
+++ b/libcxx/include/__ranges/zip_view.h
@@ -45,7 +45,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
 
 namespace ranges {
 
@@ -505,7 +505,7 @@
 } // namespace views
 } // namespace ranges
 
-#endif // _LIBCPP_STD_VER > 20
+#endif // _LIBCPP_STD_VER >= 23
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__string/char_traits.h b/libcxx/include/__string/char_traits.h
--- a/libcxx/include/__string/char_traits.h
+++ b/libcxx/include/__string/char_traits.h
@@ -199,7 +199,7 @@
     using off_type            = streamoff;
     using pos_type            = streampos;
     using state_type          = mbstate_t;
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     using comparison_category = strong_ordering;
 #endif
 
@@ -269,7 +269,7 @@
     using off_type            = streamoff;
     using pos_type            = streampos;
     using state_type          = mbstate_t;
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     using comparison_category = strong_ordering;
 #endif
 
@@ -339,7 +339,7 @@
     using off_type            = streamoff;
     using pos_type            = u8streampos;
     using state_type          = mbstate_t;
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     using comparison_category = strong_ordering;
 #endif
 
@@ -427,7 +427,7 @@
     using off_type            = streamoff;
     using pos_type            = u16streampos;
     using state_type          = mbstate_t;
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     using comparison_category = strong_ordering;
 #endif
 
@@ -521,7 +521,7 @@
     using off_type            = streamoff;
     using pos_type            = u32streampos;
     using state_type          = mbstate_t;
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     using comparison_category = strong_ordering;
 #endif
 
diff --git a/libcxx/include/__tree b/libcxx/include/__tree
--- a/libcxx/include/__tree
+++ b/libcxx/include/__tree
@@ -818,7 +818,7 @@
     template <class> friend class __map_node_destructor;
 };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _NodeType, class _Alloc>
 struct __generic_container_node_destructor;
 template <class _Tp, class _VoidPtr, class _Alloc>
@@ -849,7 +849,7 @@
     typedef typename _NodeTypes::__node_value_type_pointer pointer;
 
     _LIBCPP_INLINE_VISIBILITY __tree_iterator() _NOEXCEPT
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     : __ptr_(nullptr)
 #endif
     {}
@@ -922,7 +922,7 @@
     typedef typename _NodeTypes::__const_node_value_type_pointer pointer;
 
     _LIBCPP_INLINE_VISIBILITY __tree_const_iterator() _NOEXCEPT
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     : __ptr_(nullptr)
 #endif
     {}
@@ -1331,7 +1331,7 @@
     _LIBCPP_INLINE_VISIBILITY iterator
     __remove_node_pointer(__node_pointer) _NOEXCEPT;
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     template <class _NodeHandle, class _InsertReturnType>
     _LIBCPP_INLINE_VISIBILITY
     _InsertReturnType __node_handle_insert_unique(_NodeHandle&&);
@@ -2265,7 +2265,7 @@
     return __r;
 }
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp, class _Compare, class _Allocator>
 template <class _NodeHandle, class _InsertReturnType>
 _LIBCPP_INLINE_VISIBILITY
@@ -2422,7 +2422,7 @@
     }
 }
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 template <class _Tp, class _Compare, class _Allocator>
 typename __tree<_Tp, _Compare, _Allocator>::iterator
diff --git a/libcxx/include/__tuple_dir/sfinae_helpers.h b/libcxx/include/__tuple_dir/sfinae_helpers.h
--- a/libcxx/include/__tuple_dir/sfinae_helpers.h
+++ b/libcxx/include/__tuple_dir/sfinae_helpers.h
@@ -134,7 +134,7 @@
 };
 #endif // !defined(_LIBCPP_CXX03_LANG)
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 template <bool _CanCopy, bool _CanMove>
 struct __sfinae_ctor_base {};
@@ -189,7 +189,7 @@
   __sfinae_assign_base& operator=(__sfinae_assign_base const&) = delete;
   __sfinae_assign_base& operator=(__sfinae_assign_base&&) = default;
 };
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__tuple_dir/tuple_element.h b/libcxx/include/__tuple_dir/tuple_element.h
--- a/libcxx/include/__tuple_dir/tuple_element.h
+++ b/libcxx/include/__tuple_dir/tuple_element.h
@@ -81,7 +81,7 @@
     typedef _LIBCPP_NODEBUG __type_pack_element<_Ip, _Types...> type;
 };
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <size_t _Ip, class ..._Tp>
 using tuple_element_t _LIBCPP_NODEBUG = typename tuple_element <_Ip, _Tp...>::type;
 #endif
diff --git a/libcxx/include/__type_traits/add_const.h b/libcxx/include/__type_traits/add_const.h
--- a/libcxx/include/__type_traits/add_const.h
+++ b/libcxx/include/__type_traits/add_const.h
@@ -21,7 +21,7 @@
   typedef _LIBCPP_NODEBUG const _Tp type;
 };
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp> using add_const_t = typename add_const<_Tp>::type;
 #endif
 
diff --git a/libcxx/include/__type_traits/add_cv.h b/libcxx/include/__type_traits/add_cv.h
--- a/libcxx/include/__type_traits/add_cv.h
+++ b/libcxx/include/__type_traits/add_cv.h
@@ -21,7 +21,7 @@
   typedef _LIBCPP_NODEBUG const volatile _Tp type;
 };
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp> using add_cv_t = typename add_cv<_Tp>::type;
 #endif
 
diff --git a/libcxx/include/__type_traits/add_lvalue_reference.h b/libcxx/include/__type_traits/add_lvalue_reference.h
--- a/libcxx/include/__type_traits/add_lvalue_reference.h
+++ b/libcxx/include/__type_traits/add_lvalue_reference.h
@@ -44,7 +44,7 @@
   using type _LIBCPP_NODEBUG = __add_lvalue_reference_t<_Tp>;
 };
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp> using add_lvalue_reference_t = __add_lvalue_reference_t<_Tp>;
 #endif
 
diff --git a/libcxx/include/__type_traits/add_pointer.h b/libcxx/include/__type_traits/add_pointer.h
--- a/libcxx/include/__type_traits/add_pointer.h
+++ b/libcxx/include/__type_traits/add_pointer.h
@@ -46,7 +46,7 @@
   using type _LIBCPP_NODEBUG = __add_pointer_t<_Tp>;
 };
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp> using add_pointer_t = __add_pointer_t<_Tp>;
 #endif
 
diff --git a/libcxx/include/__type_traits/add_rvalue_reference.h b/libcxx/include/__type_traits/add_rvalue_reference.h
--- a/libcxx/include/__type_traits/add_rvalue_reference.h
+++ b/libcxx/include/__type_traits/add_rvalue_reference.h
@@ -44,7 +44,7 @@
   using type = __add_rvalue_reference_t<_Tp>;
 };
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp>
 using add_rvalue_reference_t = __add_rvalue_reference_t<_Tp>;
 #endif
diff --git a/libcxx/include/__type_traits/add_volatile.h b/libcxx/include/__type_traits/add_volatile.h
--- a/libcxx/include/__type_traits/add_volatile.h
+++ b/libcxx/include/__type_traits/add_volatile.h
@@ -21,7 +21,7 @@
   typedef _LIBCPP_NODEBUG volatile _Tp type;
 };
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp> using add_volatile_t = typename add_volatile<_Tp>::type;
 #endif
 
diff --git a/libcxx/include/__type_traits/aligned_storage.h b/libcxx/include/__type_traits/aligned_storage.h
--- a/libcxx/include/__type_traits/aligned_storage.h
+++ b/libcxx/include/__type_traits/aligned_storage.h
@@ -93,7 +93,7 @@
     };
 };
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 
   _LIBCPP_SUPPRESS_DEPRECATED_PUSH
 template <size_t _Len, size_t _Align = __find_max_align<__all_types, _Len>::value>
diff --git a/libcxx/include/__type_traits/aligned_union.h b/libcxx/include/__type_traits/aligned_union.h
--- a/libcxx/include/__type_traits/aligned_union.h
+++ b/libcxx/include/__type_traits/aligned_union.h
@@ -46,7 +46,7 @@
     typedef typename aligned_storage<__len, alignment_value>::type type;
 };
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <size_t _Len, class... _Types>
 using aligned_union_t _LIBCPP_DEPRECATED_IN_CXX23 = typename aligned_union<_Len, _Types...>::type;
 #endif
diff --git a/libcxx/include/__type_traits/alignment_of.h b/libcxx/include/__type_traits/alignment_of.h
--- a/libcxx/include/__type_traits/alignment_of.h
+++ b/libcxx/include/__type_traits/alignment_of.h
@@ -22,7 +22,7 @@
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS alignment_of
     : public integral_constant<size_t, _LIBCPP_ALIGNOF(_Tp)> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr size_t alignment_of_v = _LIBCPP_ALIGNOF(_Tp);
 #endif
diff --git a/libcxx/include/__type_traits/common_reference.h b/libcxx/include/__type_traits/common_reference.h
--- a/libcxx/include/__type_traits/common_reference.h
+++ b/libcxx/include/__type_traits/common_reference.h
@@ -27,7 +27,7 @@
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 // common_reference
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 // Let COND_RES(X, Y) be:
 template <class _Xp, class _Yp>
 using __cond_res =
@@ -181,7 +181,7 @@
 // bullet 5 - Otherwise, there shall be no member `type`.
 template <class...> struct common_reference {};
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__type_traits/common_type.h b/libcxx/include/__type_traits/common_type.h
--- a/libcxx/include/__type_traits/common_type.h
+++ b/libcxx/include/__type_traits/common_type.h
@@ -23,7 +23,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 // Let COND_RES(X, Y) be:
 template <class _Tp, class _Up>
 using __cond_type = decltype(false ? std::declval<_Tp>() : std::declval<_Up>());
@@ -125,7 +125,7 @@
 
 #undef _LIBCPP_OPTIONAL_PACK
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class ..._Tp> using common_type_t = typename common_type<_Tp...>::type;
 #endif
 
diff --git a/libcxx/include/__type_traits/conditional.h b/libcxx/include/__type_traits/conditional.h
--- a/libcxx/include/__type_traits/conditional.h
+++ b/libcxx/include/__type_traits/conditional.h
@@ -44,7 +44,7 @@
   using type _LIBCPP_NODEBUG = _Then;
 };
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <bool _Bp, class _IfRes, class _ElseRes>
 using conditional_t _LIBCPP_NODEBUG = typename conditional<_Bp, _IfRes, _ElseRes>::type;
 #endif
diff --git a/libcxx/include/__type_traits/conjunction.h b/libcxx/include/__type_traits/conjunction.h
--- a/libcxx/include/__type_traits/conjunction.h
+++ b/libcxx/include/__type_traits/conjunction.h
@@ -37,7 +37,7 @@
 template <class... _Pred>
 using _And _LIBCPP_NODEBUG = decltype(std::__and_helper<_Pred...>(0));
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 template <class...>
 struct conjunction : true_type {};
@@ -51,7 +51,7 @@
 template <class... _Args>
 inline constexpr bool conjunction_v = conjunction<_Args...>::value;
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__type_traits/decay.h b/libcxx/include/__type_traits/decay.h
--- a/libcxx/include/__type_traits/decay.h
+++ b/libcxx/include/__type_traits/decay.h
@@ -62,7 +62,7 @@
 };
 #endif // __has_builtin(__decay)
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp> using decay_t = typename decay<_Tp>::type;
 #endif
 
diff --git a/libcxx/include/__type_traits/disjunction.h b/libcxx/include/__type_traits/disjunction.h
--- a/libcxx/include/__type_traits/disjunction.h
+++ b/libcxx/include/__type_traits/disjunction.h
@@ -43,7 +43,7 @@
 template <class... _Args>
 using _Or _LIBCPP_NODEBUG = typename _OrImpl<sizeof...(_Args) != 0>::template _Result<false_type, _Args...>;
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 template <class... _Args>
 struct disjunction : _Or<_Args...> {};
@@ -51,7 +51,7 @@
 template <class... _Args>
 inline constexpr bool disjunction_v = _Or<_Args...>::value;
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__type_traits/enable_if.h b/libcxx/include/__type_traits/enable_if.h
--- a/libcxx/include/__type_traits/enable_if.h
+++ b/libcxx/include/__type_traits/enable_if.h
@@ -22,7 +22,7 @@
 
 template <bool _Bp, class _Tp = void> using __enable_if_t _LIBCPP_NODEBUG = typename enable_if<_Bp, _Tp>::type;
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <bool _Bp, class _Tp = void> using enable_if_t = typename enable_if<_Bp, _Tp>::type;
 #endif
 
diff --git a/libcxx/include/__type_traits/extent.h b/libcxx/include/__type_traits/extent.h
--- a/libcxx/include/__type_traits/extent.h
+++ b/libcxx/include/__type_traits/extent.h
@@ -25,7 +25,7 @@
 struct _LIBCPP_TEMPLATE_VIS extent
     : integral_constant<size_t, __array_extent(_Tp, _Dim)> { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp, unsigned _Ip = 0>
 inline constexpr size_t extent_v = __array_extent(_Tp, _Ip);
 #endif
@@ -43,7 +43,7 @@
 template <class _Tp, size_t _Np, unsigned _Ip> struct _LIBCPP_TEMPLATE_VIS extent<_Tp[_Np], _Ip>
     : public integral_constant<size_t, extent<_Tp, _Ip-1>::value> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp, unsigned _Ip = 0>
 inline constexpr size_t extent_v = extent<_Tp, _Ip>::value;
 #endif
diff --git a/libcxx/include/__type_traits/has_unique_object_representation.h b/libcxx/include/__type_traits/has_unique_object_representation.h
--- a/libcxx/include/__type_traits/has_unique_object_representation.h
+++ b/libcxx/include/__type_traits/has_unique_object_representation.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS has_unique_object_representations
     : public integral_constant<bool,
diff --git a/libcxx/include/__type_traits/has_virtual_destructor.h b/libcxx/include/__type_traits/has_virtual_destructor.h
--- a/libcxx/include/__type_traits/has_virtual_destructor.h
+++ b/libcxx/include/__type_traits/has_virtual_destructor.h
@@ -21,7 +21,7 @@
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS has_virtual_destructor
     : public integral_constant<bool, __has_virtual_destructor(_Tp)> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool has_virtual_destructor_v = __has_virtual_destructor(_Tp);
 #endif
diff --git a/libcxx/include/__type_traits/integral_constant.h b/libcxx/include/__type_traits/integral_constant.h
--- a/libcxx/include/__type_traits/integral_constant.h
+++ b/libcxx/include/__type_traits/integral_constant.h
@@ -25,7 +25,7 @@
   typedef integral_constant type;
   _LIBCPP_INLINE_VISIBILITY
   _LIBCPP_CONSTEXPR operator value_type() const _NOEXCEPT {return value;}
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
   _LIBCPP_INLINE_VISIBILITY
   constexpr value_type operator ()() const _NOEXCEPT {return value;}
 #endif
@@ -40,7 +40,7 @@
 template <bool _Val>
 using _BoolConstant _LIBCPP_NODEBUG = integral_constant<bool, _Val>;
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <bool __b>
 using bool_constant = integral_constant<bool, __b>;
 #endif
diff --git a/libcxx/include/__type_traits/is_abstract.h b/libcxx/include/__type_traits/is_abstract.h
--- a/libcxx/include/__type_traits/is_abstract.h
+++ b/libcxx/include/__type_traits/is_abstract.h
@@ -21,7 +21,7 @@
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_abstract
     : public integral_constant<bool, __is_abstract(_Tp)> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_abstract_v = __is_abstract(_Tp);
 #endif
diff --git a/libcxx/include/__type_traits/is_aggregate.h b/libcxx/include/__type_traits/is_aggregate.h
--- a/libcxx/include/__type_traits/is_aggregate.h
+++ b/libcxx/include/__type_traits/is_aggregate.h
@@ -18,7 +18,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS
 is_aggregate : public integral_constant<bool, __is_aggregate(_Tp)> {};
@@ -26,7 +26,7 @@
 template <class _Tp>
 inline constexpr bool is_aggregate_v = __is_aggregate(_Tp);
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__type_traits/is_arithmetic.h b/libcxx/include/__type_traits/is_arithmetic.h
--- a/libcxx/include/__type_traits/is_arithmetic.h
+++ b/libcxx/include/__type_traits/is_arithmetic.h
@@ -24,7 +24,7 @@
     : public integral_constant<bool, is_integral<_Tp>::value      ||
                                      is_floating_point<_Tp>::value> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_arithmetic_v = is_arithmetic<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_array.h b/libcxx/include/__type_traits/is_array.h
--- a/libcxx/include/__type_traits/is_array.h
+++ b/libcxx/include/__type_traits/is_array.h
@@ -26,7 +26,7 @@
 template <class _Tp>
 struct _LIBCPP_TEMPLATE_VIS is_array : _BoolConstant<__is_array(_Tp)> { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_array_v = __is_array(_Tp);
 #endif
@@ -40,7 +40,7 @@
 template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS is_array<_Tp[_Np]>
     : public true_type {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_array_v = is_array<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_assignable.h b/libcxx/include/__type_traits/is_assignable.h
--- a/libcxx/include/__type_traits/is_assignable.h
+++ b/libcxx/include/__type_traits/is_assignable.h
@@ -21,7 +21,7 @@
 template<class _Tp, class _Up>
 struct _LIBCPP_TEMPLATE_VIS is_assignable : _BoolConstant<__is_assignable(_Tp, _Up)> { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp, class _Arg>
 inline constexpr bool is_assignable_v = __is_assignable(_Tp, _Arg);
 #endif
diff --git a/libcxx/include/__type_traits/is_base_of.h b/libcxx/include/__type_traits/is_base_of.h
--- a/libcxx/include/__type_traits/is_base_of.h
+++ b/libcxx/include/__type_traits/is_base_of.h
@@ -22,7 +22,7 @@
 struct _LIBCPP_TEMPLATE_VIS is_base_of
     : public integral_constant<bool, __is_base_of(_Bp, _Dp)> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Bp, class _Dp>
 inline constexpr bool is_base_of_v = __is_base_of(_Bp, _Dp);
 #endif
diff --git a/libcxx/include/__type_traits/is_bounded_array.h b/libcxx/include/__type_traits/is_bounded_array.h
--- a/libcxx/include/__type_traits/is_bounded_array.h
+++ b/libcxx/include/__type_traits/is_bounded_array.h
@@ -22,7 +22,7 @@
 template <class>                 struct _LIBCPP_TEMPLATE_VIS __libcpp_is_bounded_array           : false_type {};
 template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS __libcpp_is_bounded_array<_Tp[_Np]> : true_type {};
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class>                 struct _LIBCPP_TEMPLATE_VIS is_bounded_array           : false_type {};
 template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS is_bounded_array<_Tp[_Np]> : true_type {};
diff --git a/libcxx/include/__type_traits/is_class.h b/libcxx/include/__type_traits/is_class.h
--- a/libcxx/include/__type_traits/is_class.h
+++ b/libcxx/include/__type_traits/is_class.h
@@ -21,7 +21,7 @@
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_class
     : public integral_constant<bool, __is_class(_Tp)> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_class_v = __is_class(_Tp);
 #endif
diff --git a/libcxx/include/__type_traits/is_compound.h b/libcxx/include/__type_traits/is_compound.h
--- a/libcxx/include/__type_traits/is_compound.h
+++ b/libcxx/include/__type_traits/is_compound.h
@@ -24,7 +24,7 @@
 template<class _Tp>
 struct _LIBCPP_TEMPLATE_VIS is_compound : _BoolConstant<__is_compound(_Tp)> { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_compound_v = __is_compound(_Tp);
 #endif
@@ -34,7 +34,7 @@
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_compound
     : public integral_constant<bool, !is_fundamental<_Tp>::value> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_compound_v = is_compound<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_const.h b/libcxx/include/__type_traits/is_const.h
--- a/libcxx/include/__type_traits/is_const.h
+++ b/libcxx/include/__type_traits/is_const.h
@@ -23,7 +23,7 @@
 template <class _Tp>
 struct _LIBCPP_TEMPLATE_VIS is_const : _BoolConstant<__is_const(_Tp)> { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_const_v = __is_const(_Tp);
 #endif
@@ -33,7 +33,7 @@
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_const            : public false_type {};
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_const<_Tp const> : public true_type {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_const_v = is_const<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_constant_evaluated.h b/libcxx/include/__type_traits/is_constant_evaluated.h
--- a/libcxx/include/__type_traits/is_constant_evaluated.h
+++ b/libcxx/include/__type_traits/is_constant_evaluated.h
@@ -17,7 +17,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 _LIBCPP_INLINE_VISIBILITY
 inline constexpr bool is_constant_evaluated() noexcept {
   return __builtin_is_constant_evaluated();
diff --git a/libcxx/include/__type_traits/is_constructible.h b/libcxx/include/__type_traits/is_constructible.h
--- a/libcxx/include/__type_traits/is_constructible.h
+++ b/libcxx/include/__type_traits/is_constructible.h
@@ -23,7 +23,7 @@
     : public integral_constant<bool, __is_constructible(_Tp, _Args...)>
 { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp, class ..._Args>
 inline constexpr bool is_constructible_v = __is_constructible(_Tp, _Args...);
 #endif
diff --git a/libcxx/include/__type_traits/is_convertible.h b/libcxx/include/__type_traits/is_convertible.h
--- a/libcxx/include/__type_traits/is_convertible.h
+++ b/libcxx/include/__type_traits/is_convertible.h
@@ -98,7 +98,7 @@
 
 #endif // __has_builtin(__is_convertible_to) && !defined(_LIBCPP_USE_IS_CONVERTIBLE_FALLBACK)
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _From, class _To>
 inline constexpr bool is_convertible_v = is_convertible<_From, _To>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_copy_assignable.h b/libcxx/include/__type_traits/is_copy_assignable.h
--- a/libcxx/include/__type_traits/is_copy_assignable.h
+++ b/libcxx/include/__type_traits/is_copy_assignable.h
@@ -27,7 +27,7 @@
           __is_assignable(__add_lvalue_reference_t<_Tp>,
                           __add_lvalue_reference_t<typename add_const<_Tp>::type>)> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_copy_assignable_v = is_copy_assignable<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_copy_constructible.h b/libcxx/include/__type_traits/is_copy_constructible.h
--- a/libcxx/include/__type_traits/is_copy_constructible.h
+++ b/libcxx/include/__type_traits/is_copy_constructible.h
@@ -26,7 +26,7 @@
           bool,
           __is_constructible(_Tp, __add_lvalue_reference_t<typename add_const<_Tp>::type>)> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_copy_constructible_v = is_copy_constructible<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_default_constructible.h b/libcxx/include/__type_traits/is_default_constructible.h
--- a/libcxx/include/__type_traits/is_default_constructible.h
+++ b/libcxx/include/__type_traits/is_default_constructible.h
@@ -23,7 +23,7 @@
     : public integral_constant<bool, __is_constructible(_Tp)>
     {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_default_constructible_v = __is_constructible(_Tp);
 #endif
diff --git a/libcxx/include/__type_traits/is_destructible.h b/libcxx/include/__type_traits/is_destructible.h
--- a/libcxx/include/__type_traits/is_destructible.h
+++ b/libcxx/include/__type_traits/is_destructible.h
@@ -27,7 +27,7 @@
 template<class _Tp>
 struct _LIBCPP_TEMPLATE_VIS is_destructible : _BoolConstant<__is_destructible(_Tp)> { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_destructible_v = __is_destructible(_Tp);
 #endif
@@ -90,7 +90,7 @@
 struct is_destructible<void>
     : public false_type {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_destructible_v = is_destructible<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_empty.h b/libcxx/include/__type_traits/is_empty.h
--- a/libcxx/include/__type_traits/is_empty.h
+++ b/libcxx/include/__type_traits/is_empty.h
@@ -22,7 +22,7 @@
 struct _LIBCPP_TEMPLATE_VIS is_empty
     : public integral_constant<bool, __is_empty(_Tp)> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_empty_v = __is_empty(_Tp);
 #endif
diff --git a/libcxx/include/__type_traits/is_enum.h b/libcxx/include/__type_traits/is_enum.h
--- a/libcxx/include/__type_traits/is_enum.h
+++ b/libcxx/include/__type_traits/is_enum.h
@@ -21,7 +21,7 @@
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_enum
     : public integral_constant<bool, __is_enum(_Tp)> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_enum_v = __is_enum(_Tp);
 #endif
diff --git a/libcxx/include/__type_traits/is_final.h b/libcxx/include/__type_traits/is_final.h
--- a/libcxx/include/__type_traits/is_final.h
+++ b/libcxx/include/__type_traits/is_final.h
@@ -21,12 +21,12 @@
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS
 __libcpp_is_final : public integral_constant<bool, __is_final(_Tp)> {};
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS
 is_final : public integral_constant<bool, __is_final(_Tp)> {};
 #endif
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_final_v = __is_final(_Tp);
 #endif
diff --git a/libcxx/include/__type_traits/is_floating_point.h b/libcxx/include/__type_traits/is_floating_point.h
--- a/libcxx/include/__type_traits/is_floating_point.h
+++ b/libcxx/include/__type_traits/is_floating_point.h
@@ -27,7 +27,7 @@
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_floating_point
     : public __libcpp_is_floating_point<__remove_cv_t<_Tp> > {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_floating_point_v = is_floating_point<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_function.h b/libcxx/include/__type_traits/is_function.h
--- a/libcxx/include/__type_traits/is_function.h
+++ b/libcxx/include/__type_traits/is_function.h
@@ -33,7 +33,7 @@
 
 #endif // __has_builtin(__is_function)
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_function_v = is_function<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_fundamental.h b/libcxx/include/__type_traits/is_fundamental.h
--- a/libcxx/include/__type_traits/is_fundamental.h
+++ b/libcxx/include/__type_traits/is_fundamental.h
@@ -25,7 +25,7 @@
 template<class _Tp>
 struct _LIBCPP_TEMPLATE_VIS is_fundamental : _BoolConstant<__is_fundamental(_Tp)> { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_fundamental_v = __is_fundamental(_Tp);
 #endif
@@ -37,7 +37,7 @@
                                      __is_nullptr_t<_Tp>::value ||
                                      is_arithmetic<_Tp>::value> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_fundamental_v = is_fundamental<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_integral.h b/libcxx/include/__type_traits/is_integral.h
--- a/libcxx/include/__type_traits/is_integral.h
+++ b/libcxx/include/__type_traits/is_integral.h
@@ -50,7 +50,7 @@
 template <class _Tp>
 struct _LIBCPP_TEMPLATE_VIS is_integral : _BoolConstant<__is_integral(_Tp)> { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_integral_v = __is_integral(_Tp);
 #endif
@@ -60,7 +60,7 @@
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_integral
     : public _BoolConstant<__libcpp_is_integral<__remove_cv_t<_Tp> >::value> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_integral_v = is_integral<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_literal_type.h b/libcxx/include/__type_traits/is_literal_type.h
--- a/libcxx/include/__type_traits/is_literal_type.h
+++ b/libcxx/include/__type_traits/is_literal_type.h
@@ -23,10 +23,10 @@
     : public integral_constant<bool, __is_literal_type(_Tp)>
     {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 _LIBCPP_DEPRECATED_IN_CXX17 inline constexpr bool is_literal_type_v = __is_literal_type(_Tp);
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 #endif // _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS)
 
 _LIBCPP_END_NAMESPACE_STD
diff --git a/libcxx/include/__type_traits/is_member_function_pointer.h b/libcxx/include/__type_traits/is_member_function_pointer.h
--- a/libcxx/include/__type_traits/is_member_function_pointer.h
+++ b/libcxx/include/__type_traits/is_member_function_pointer.h
@@ -42,7 +42,7 @@
 struct _LIBCPP_TEMPLATE_VIS is_member_function_pointer
     : _BoolConstant<__is_member_function_pointer(_Tp)> { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_member_function_pointer_v = __is_member_function_pointer(_Tp);
 #endif
@@ -52,7 +52,7 @@
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_member_function_pointer
     : public _BoolConstant< __libcpp_is_member_pointer<__remove_cv_t<_Tp> >::__is_func > {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_member_function_pointer_v = is_member_function_pointer<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_member_object_pointer.h b/libcxx/include/__type_traits/is_member_object_pointer.h
--- a/libcxx/include/__type_traits/is_member_object_pointer.h
+++ b/libcxx/include/__type_traits/is_member_object_pointer.h
@@ -24,7 +24,7 @@
 struct _LIBCPP_TEMPLATE_VIS is_member_object_pointer
     : _BoolConstant<__is_member_object_pointer(_Tp)> { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_member_object_pointer_v = __is_member_object_pointer(_Tp);
 #endif
@@ -34,7 +34,7 @@
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_member_object_pointer
     : public _BoolConstant< __libcpp_is_member_pointer<__remove_cv_t<_Tp> >::__is_obj >  {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_member_object_pointer_v = is_member_object_pointer<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_member_pointer.h b/libcxx/include/__type_traits/is_member_pointer.h
--- a/libcxx/include/__type_traits/is_member_pointer.h
+++ b/libcxx/include/__type_traits/is_member_pointer.h
@@ -24,7 +24,7 @@
 template<class _Tp>
 struct _LIBCPP_TEMPLATE_VIS is_member_pointer : _BoolConstant<__is_member_pointer(_Tp)> { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_member_pointer_v = __is_member_pointer(_Tp);
 #endif
@@ -34,7 +34,7 @@
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_member_pointer
  : public _BoolConstant< __libcpp_is_member_pointer<__remove_cv_t<_Tp> >::__is_member > {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_member_pointer_v = is_member_pointer<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_move_assignable.h b/libcxx/include/__type_traits/is_move_assignable.h
--- a/libcxx/include/__type_traits/is_move_assignable.h
+++ b/libcxx/include/__type_traits/is_move_assignable.h
@@ -26,7 +26,7 @@
           bool,
           __is_assignable(__add_lvalue_reference_t<_Tp>, __add_rvalue_reference_t<_Tp>)> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_move_assignable_v = is_move_assignable<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_move_constructible.h b/libcxx/include/__type_traits/is_move_constructible.h
--- a/libcxx/include/__type_traits/is_move_constructible.h
+++ b/libcxx/include/__type_traits/is_move_constructible.h
@@ -24,7 +24,7 @@
     : public integral_constant<bool, __is_constructible(_Tp, __add_rvalue_reference_t<_Tp>)>
     {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_move_constructible_v = is_move_constructible<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_nothrow_assignable.h b/libcxx/include/__type_traits/is_nothrow_assignable.h
--- a/libcxx/include/__type_traits/is_nothrow_assignable.h
+++ b/libcxx/include/__type_traits/is_nothrow_assignable.h
@@ -22,7 +22,7 @@
 struct _LIBCPP_TEMPLATE_VIS is_nothrow_assignable
     : public integral_constant<bool, __is_nothrow_assignable(_Tp, _Arg)> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp, class _Arg>
 inline constexpr bool is_nothrow_assignable_v = __is_nothrow_assignable(_Tp, _Arg);
 #endif
diff --git a/libcxx/include/__type_traits/is_nothrow_constructible.h b/libcxx/include/__type_traits/is_nothrow_constructible.h
--- a/libcxx/include/__type_traits/is_nothrow_constructible.h
+++ b/libcxx/include/__type_traits/is_nothrow_constructible.h
@@ -68,7 +68,7 @@
 #endif // __has_builtin(__is_nothrow_constructible)
 
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp, class ..._Args>
 inline constexpr bool is_nothrow_constructible_v = is_nothrow_constructible<_Tp, _Args...>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_nothrow_convertible.h b/libcxx/include/__type_traits/is_nothrow_convertible.h
--- a/libcxx/include/__type_traits/is_nothrow_convertible.h
+++ b/libcxx/include/__type_traits/is_nothrow_convertible.h
@@ -24,7 +24,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <typename _Tp>
 static void __test_noexcept(_Tp) noexcept;
@@ -46,7 +46,7 @@
 template <typename _Fm, typename _To>
 inline constexpr bool is_nothrow_convertible_v = is_nothrow_convertible<_Fm, _To>::value;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__type_traits/is_nothrow_copy_assignable.h b/libcxx/include/__type_traits/is_nothrow_copy_assignable.h
--- a/libcxx/include/__type_traits/is_nothrow_copy_assignable.h
+++ b/libcxx/include/__type_traits/is_nothrow_copy_assignable.h
@@ -28,7 +28,7 @@
               __add_lvalue_reference_t<_Tp>,
               __add_lvalue_reference_t<typename add_const<_Tp>::type>)> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_nothrow_copy_assignable_v = is_nothrow_copy_assignable<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_nothrow_copy_constructible.h b/libcxx/include/__type_traits/is_nothrow_copy_constructible.h
--- a/libcxx/include/__type_traits/is_nothrow_copy_constructible.h
+++ b/libcxx/include/__type_traits/is_nothrow_copy_constructible.h
@@ -38,7 +38,7 @@
 
 #endif // _LIBCPP_COMPILER_GCC
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_nothrow_copy_constructible_v = is_nothrow_copy_constructible<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_nothrow_default_constructible.h b/libcxx/include/__type_traits/is_nothrow_default_constructible.h
--- a/libcxx/include/__type_traits/is_nothrow_default_constructible.h
+++ b/libcxx/include/__type_traits/is_nothrow_default_constructible.h
@@ -22,7 +22,7 @@
     : public integral_constant<bool, __is_nothrow_constructible(_Tp)>
     {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_nothrow_default_constructible_v = __is_nothrow_constructible(_Tp);
 #endif
diff --git a/libcxx/include/__type_traits/is_nothrow_destructible.h b/libcxx/include/__type_traits/is_nothrow_destructible.h
--- a/libcxx/include/__type_traits/is_nothrow_destructible.h
+++ b/libcxx/include/__type_traits/is_nothrow_destructible.h
@@ -79,7 +79,7 @@
 
 #endif
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_nothrow_destructible_v = is_nothrow_destructible<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_nothrow_move_assignable.h b/libcxx/include/__type_traits/is_nothrow_move_assignable.h
--- a/libcxx/include/__type_traits/is_nothrow_move_assignable.h
+++ b/libcxx/include/__type_traits/is_nothrow_move_assignable.h
@@ -27,7 +27,7 @@
           __is_nothrow_assignable(__add_lvalue_reference_t<_Tp>, __add_rvalue_reference_t<_Tp>)> {
 };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_nothrow_move_assignable_v = is_nothrow_move_assignable<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_nothrow_move_constructible.h b/libcxx/include/__type_traits/is_nothrow_move_constructible.h
--- a/libcxx/include/__type_traits/is_nothrow_move_constructible.h
+++ b/libcxx/include/__type_traits/is_nothrow_move_constructible.h
@@ -35,7 +35,7 @@
 
 #endif // _LIBCPP_COMPILER_GCC
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_nothrow_move_constructible_v = is_nothrow_move_constructible<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_null_pointer.h b/libcxx/include/__type_traits/is_null_pointer.h
--- a/libcxx/include/__type_traits/is_null_pointer.h
+++ b/libcxx/include/__type_traits/is_null_pointer.h
@@ -26,15 +26,15 @@
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS __is_nullptr_t
     : public __is_nullptr_t_impl<__remove_cv_t<_Tp> > {};
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_null_pointer
     : public __is_nullptr_t_impl<__remove_cv_t<_Tp> > {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_null_pointer_v = is_null_pointer<_Tp>::value;
 #endif
-#endif // _LIBCPP_STD_VER > 11
+#endif // _LIBCPP_STD_VER >= 14
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__type_traits/is_object.h b/libcxx/include/__type_traits/is_object.h
--- a/libcxx/include/__type_traits/is_object.h
+++ b/libcxx/include/__type_traits/is_object.h
@@ -27,7 +27,7 @@
 template<class _Tp>
 struct _LIBCPP_TEMPLATE_VIS is_object : _BoolConstant<__is_object(_Tp)> { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_object_v = __is_object(_Tp);
 #endif
@@ -40,7 +40,7 @@
                                      is_union<_Tp>::value  ||
                                      is_class<_Tp>::value  > {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_object_v = is_object<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_pod.h b/libcxx/include/__type_traits/is_pod.h
--- a/libcxx/include/__type_traits/is_pod.h
+++ b/libcxx/include/__type_traits/is_pod.h
@@ -21,7 +21,7 @@
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_pod
     : public integral_constant<bool, __is_pod(_Tp)> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_pod_v = __is_pod(_Tp);
 #endif
diff --git a/libcxx/include/__type_traits/is_pointer.h b/libcxx/include/__type_traits/is_pointer.h
--- a/libcxx/include/__type_traits/is_pointer.h
+++ b/libcxx/include/__type_traits/is_pointer.h
@@ -24,7 +24,7 @@
 template<class _Tp>
 struct _LIBCPP_TEMPLATE_VIS is_pointer : _BoolConstant<__is_pointer(_Tp)> { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_pointer_v = __is_pointer(_Tp);
 #endif
@@ -45,7 +45,7 @@
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_pointer
     : public __libcpp_is_pointer<typename __libcpp_remove_objc_qualifiers<__remove_cv_t<_Tp> >::type> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_pointer_v = is_pointer<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_polymorphic.h b/libcxx/include/__type_traits/is_polymorphic.h
--- a/libcxx/include/__type_traits/is_polymorphic.h
+++ b/libcxx/include/__type_traits/is_polymorphic.h
@@ -22,7 +22,7 @@
 struct _LIBCPP_TEMPLATE_VIS is_polymorphic
     : public integral_constant<bool, __is_polymorphic(_Tp)> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_polymorphic_v = __is_polymorphic(_Tp);
 #endif
diff --git a/libcxx/include/__type_traits/is_reference.h b/libcxx/include/__type_traits/is_reference.h
--- a/libcxx/include/__type_traits/is_reference.h
+++ b/libcxx/include/__type_traits/is_reference.h
@@ -31,7 +31,7 @@
 template<class _Tp>
 struct _LIBCPP_TEMPLATE_VIS is_reference : _BoolConstant<__is_reference(_Tp)> { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_reference_v = __is_reference(_Tp);
 template <class _Tp>
@@ -52,7 +52,7 @@
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_reference<_Tp&>  : public true_type {};
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_reference<_Tp&&> : public true_type {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_reference_v = is_reference<_Tp>::value;
 
diff --git a/libcxx/include/__type_traits/is_same.h b/libcxx/include/__type_traits/is_same.h
--- a/libcxx/include/__type_traits/is_same.h
+++ b/libcxx/include/__type_traits/is_same.h
@@ -21,7 +21,7 @@
 template <class _Tp, class _Up>
 struct _LIBCPP_TEMPLATE_VIS is_same : _BoolConstant<__is_same(_Tp, _Up)> { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp, class _Up>
 inline constexpr bool is_same_v = __is_same(_Tp, _Up);
 #endif
diff --git a/libcxx/include/__type_traits/is_scalar.h b/libcxx/include/__type_traits/is_scalar.h
--- a/libcxx/include/__type_traits/is_scalar.h
+++ b/libcxx/include/__type_traits/is_scalar.h
@@ -28,7 +28,7 @@
 template<class _Tp>
 struct _LIBCPP_TEMPLATE_VIS is_scalar : _BoolConstant<__is_scalar(_Tp)> { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_scalar_v = __is_scalar(_Tp);
 #endif
@@ -50,7 +50,7 @@
 
 template <> struct _LIBCPP_TEMPLATE_VIS is_scalar<nullptr_t> : public true_type {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_scalar_v = is_scalar<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_scoped_enum.h b/libcxx/include/__type_traits/is_scoped_enum.h
--- a/libcxx/include/__type_traits/is_scoped_enum.h
+++ b/libcxx/include/__type_traits/is_scoped_enum.h
@@ -21,7 +21,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
 template <class _Tp, bool = is_enum_v<_Tp> >
 struct __is_scoped_enum_helper : false_type {};
 
diff --git a/libcxx/include/__type_traits/is_signed.h b/libcxx/include/__type_traits/is_signed.h
--- a/libcxx/include/__type_traits/is_signed.h
+++ b/libcxx/include/__type_traits/is_signed.h
@@ -25,7 +25,7 @@
 template<class _Tp>
 struct _LIBCPP_TEMPLATE_VIS is_signed : _BoolConstant<__is_signed(_Tp)> { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_signed_v = __is_signed(_Tp);
 #endif
@@ -45,7 +45,7 @@
 
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_signed : public __libcpp_is_signed<_Tp> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_signed_v = is_signed<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_specialization.h b/libcxx/include/__type_traits/is_specialization.h
--- a/libcxx/include/__type_traits/is_specialization.h
+++ b/libcxx/include/__type_traits/is_specialization.h
@@ -30,7 +30,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 template <class _Tp, template <class...> class _Template>
 inline constexpr bool __is_specialization_v = false; // true if and only if _Tp is a specialization of _Template
@@ -38,7 +38,7 @@
 template <template <class...> class _Template, class... _Args>
 inline constexpr bool __is_specialization_v<_Template<_Args...>, _Template> = true;
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__type_traits/is_standard_layout.h b/libcxx/include/__type_traits/is_standard_layout.h
--- a/libcxx/include/__type_traits/is_standard_layout.h
+++ b/libcxx/include/__type_traits/is_standard_layout.h
@@ -22,7 +22,7 @@
     : public integral_constant<bool, __is_standard_layout(_Tp)>
     {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_standard_layout_v = __is_standard_layout(_Tp);
 #endif
diff --git a/libcxx/include/__type_traits/is_swappable.h b/libcxx/include/__type_traits/is_swappable.h
--- a/libcxx/include/__type_traits/is_swappable.h
+++ b/libcxx/include/__type_traits/is_swappable.h
@@ -108,7 +108,7 @@
 {
 };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 template <class _Tp, class _Up>
 struct _LIBCPP_TEMPLATE_VIS is_swappable_with
@@ -158,7 +158,7 @@
 template <class _Tp>
 inline constexpr bool is_nothrow_swappable_v = is_nothrow_swappable<_Tp>::value;
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__type_traits/is_trivial.h b/libcxx/include/__type_traits/is_trivial.h
--- a/libcxx/include/__type_traits/is_trivial.h
+++ b/libcxx/include/__type_traits/is_trivial.h
@@ -22,7 +22,7 @@
     : public integral_constant<bool, __is_trivial(_Tp)>
     {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_trivial_v = __is_trivial(_Tp);
 #endif
diff --git a/libcxx/include/__type_traits/is_trivially_assignable.h b/libcxx/include/__type_traits/is_trivially_assignable.h
--- a/libcxx/include/__type_traits/is_trivially_assignable.h
+++ b/libcxx/include/__type_traits/is_trivially_assignable.h
@@ -23,7 +23,7 @@
     : integral_constant<bool, __is_trivially_assignable(_Tp, _Arg)>
 { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp, class _Arg>
 inline constexpr bool is_trivially_assignable_v = __is_trivially_assignable(_Tp, _Arg);
 #endif
diff --git a/libcxx/include/__type_traits/is_trivially_constructible.h b/libcxx/include/__type_traits/is_trivially_constructible.h
--- a/libcxx/include/__type_traits/is_trivially_constructible.h
+++ b/libcxx/include/__type_traits/is_trivially_constructible.h
@@ -24,7 +24,7 @@
 {
 };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp, class... _Args>
 inline constexpr bool is_trivially_constructible_v = __is_trivially_constructible(_Tp, _Args...);
 #endif
diff --git a/libcxx/include/__type_traits/is_trivially_copy_assignable.h b/libcxx/include/__type_traits/is_trivially_copy_assignable.h
--- a/libcxx/include/__type_traits/is_trivially_copy_assignable.h
+++ b/libcxx/include/__type_traits/is_trivially_copy_assignable.h
@@ -28,7 +28,7 @@
               __add_lvalue_reference_t<_Tp>,
               __add_lvalue_reference_t<typename add_const<_Tp>::type>)> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_trivially_copy_assignable_v = is_trivially_copy_assignable<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_trivially_copy_constructible.h b/libcxx/include/__type_traits/is_trivially_copy_constructible.h
--- a/libcxx/include/__type_traits/is_trivially_copy_constructible.h
+++ b/libcxx/include/__type_traits/is_trivially_copy_constructible.h
@@ -23,7 +23,7 @@
     : public integral_constant<bool, __is_trivially_constructible(_Tp, __add_lvalue_reference_t<const _Tp>)>
     {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_trivially_copy_constructible_v = is_trivially_copy_constructible<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_trivially_copyable.h b/libcxx/include/__type_traits/is_trivially_copyable.h
--- a/libcxx/include/__type_traits/is_trivially_copyable.h
+++ b/libcxx/include/__type_traits/is_trivially_copyable.h
@@ -22,7 +22,7 @@
     : public integral_constant<bool, __is_trivially_copyable(_Tp)>
     {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_trivially_copyable_v = __is_trivially_copyable(_Tp);
 #endif
diff --git a/libcxx/include/__type_traits/is_trivially_default_constructible.h b/libcxx/include/__type_traits/is_trivially_default_constructible.h
--- a/libcxx/include/__type_traits/is_trivially_default_constructible.h
+++ b/libcxx/include/__type_traits/is_trivially_default_constructible.h
@@ -22,7 +22,7 @@
     : public integral_constant<bool, __is_trivially_constructible(_Tp)>
     {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_trivially_default_constructible_v = __is_trivially_constructible(_Tp);
 #endif
diff --git a/libcxx/include/__type_traits/is_trivially_destructible.h b/libcxx/include/__type_traits/is_trivially_destructible.h
--- a/libcxx/include/__type_traits/is_trivially_destructible.h
+++ b/libcxx/include/__type_traits/is_trivially_destructible.h
@@ -35,7 +35,7 @@
 
 #endif // __has_builtin(__is_trivially_destructible)
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_trivially_destructible_v = is_trivially_destructible<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_trivially_move_assignable.h b/libcxx/include/__type_traits/is_trivially_move_assignable.h
--- a/libcxx/include/__type_traits/is_trivially_move_assignable.h
+++ b/libcxx/include/__type_traits/is_trivially_move_assignable.h
@@ -26,7 +26,7 @@
           bool,
           __is_trivially_assignable(__add_lvalue_reference_t<_Tp>, __add_rvalue_reference_t<_Tp>)> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_trivially_move_assignable_v = is_trivially_move_assignable<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_trivially_move_constructible.h b/libcxx/include/__type_traits/is_trivially_move_constructible.h
--- a/libcxx/include/__type_traits/is_trivially_move_constructible.h
+++ b/libcxx/include/__type_traits/is_trivially_move_constructible.h
@@ -23,7 +23,7 @@
 struct _LIBCPP_TEMPLATE_VIS is_trivially_move_constructible
     : public integral_constant<bool, __is_trivially_constructible(_Tp, __add_rvalue_reference_t<_Tp>)> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_trivially_move_constructible_v = is_trivially_move_constructible<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_unbounded_array.h b/libcxx/include/__type_traits/is_unbounded_array.h
--- a/libcxx/include/__type_traits/is_unbounded_array.h
+++ b/libcxx/include/__type_traits/is_unbounded_array.h
@@ -21,7 +21,7 @@
 template <class>     struct _LIBCPP_TEMPLATE_VIS __libcpp_is_unbounded_array        : false_type {};
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS __libcpp_is_unbounded_array<_Tp[]> : true_type {};
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class>     struct _LIBCPP_TEMPLATE_VIS is_unbounded_array        : false_type {};
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_unbounded_array<_Tp[]> : true_type {};
diff --git a/libcxx/include/__type_traits/is_union.h b/libcxx/include/__type_traits/is_union.h
--- a/libcxx/include/__type_traits/is_union.h
+++ b/libcxx/include/__type_traits/is_union.h
@@ -21,7 +21,7 @@
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_union
     : public integral_constant<bool, __is_union(_Tp)> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_union_v = __is_union(_Tp);
 #endif
diff --git a/libcxx/include/__type_traits/is_unsigned.h b/libcxx/include/__type_traits/is_unsigned.h
--- a/libcxx/include/__type_traits/is_unsigned.h
+++ b/libcxx/include/__type_traits/is_unsigned.h
@@ -25,7 +25,7 @@
 template<class _Tp>
 struct _LIBCPP_TEMPLATE_VIS is_unsigned : _BoolConstant<__is_unsigned(_Tp)> { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_unsigned_v = __is_unsigned(_Tp);
 #endif
@@ -45,7 +45,7 @@
 
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_unsigned : public __libcpp_is_unsigned<_Tp> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_unsigned_v = is_unsigned<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_void.h b/libcxx/include/__type_traits/is_void.h
--- a/libcxx/include/__type_traits/is_void.h
+++ b/libcxx/include/__type_traits/is_void.h
@@ -25,7 +25,7 @@
 template <class _Tp>
 struct _LIBCPP_TEMPLATE_VIS is_void : _BoolConstant<__is_void(_Tp)> { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_void_v = __is_void(_Tp);
 #endif
@@ -35,7 +35,7 @@
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_void
     : public is_same<__remove_cv_t<_Tp>, void> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_void_v = is_void<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/is_volatile.h b/libcxx/include/__type_traits/is_volatile.h
--- a/libcxx/include/__type_traits/is_volatile.h
+++ b/libcxx/include/__type_traits/is_volatile.h
@@ -23,7 +23,7 @@
 template <class _Tp>
 struct _LIBCPP_TEMPLATE_VIS is_volatile : _BoolConstant<__is_volatile(_Tp)> { };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_volatile_v = __is_volatile(_Tp);
 #endif
@@ -33,7 +33,7 @@
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_volatile               : public false_type {};
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_volatile<_Tp volatile> : public true_type {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_volatile_v = is_volatile<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/make_32_64_or_128_bit.h b/libcxx/include/__type_traits/make_32_64_or_128_bit.h
--- a/libcxx/include/__type_traits/make_32_64_or_128_bit.h
+++ b/libcxx/include/__type_traits/make_32_64_or_128_bit.h
@@ -27,7 +27,7 @@
 ///
 /// The restriction is the same as the integral version of to_char.
 template <class _Tp>
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
   requires (is_signed_v<_Tp> || is_unsigned_v<_Tp> || is_same_v<_Tp, char>)
 #endif
 using __make_32_64_or_128_bit_t =
diff --git a/libcxx/include/__type_traits/make_signed.h b/libcxx/include/__type_traits/make_signed.h
--- a/libcxx/include/__type_traits/make_signed.h
+++ b/libcxx/include/__type_traits/make_signed.h
@@ -77,7 +77,7 @@
   using type _LIBCPP_NODEBUG = __make_signed_t<_Tp>;
 };
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp> using make_signed_t = __make_signed_t<_Tp>;
 #endif
 
diff --git a/libcxx/include/__type_traits/make_unsigned.h b/libcxx/include/__type_traits/make_unsigned.h
--- a/libcxx/include/__type_traits/make_unsigned.h
+++ b/libcxx/include/__type_traits/make_unsigned.h
@@ -79,7 +79,7 @@
   using type _LIBCPP_NODEBUG = __make_unsigned_t<_Tp>;
 };
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp> using make_unsigned_t = __make_unsigned_t<_Tp>;
 #endif
 
diff --git a/libcxx/include/__type_traits/negation.h b/libcxx/include/__type_traits/negation.h
--- a/libcxx/include/__type_traits/negation.h
+++ b/libcxx/include/__type_traits/negation.h
@@ -21,12 +21,12 @@
 template <class _Pred>
 struct _Not : _BoolConstant<!_Pred::value> {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 struct negation : _Not<_Tp> {};
 template<class _Tp>
 inline constexpr bool negation_v = !_Tp::value;
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__type_traits/noexcept_move_assign_container.h b/libcxx/include/__type_traits/noexcept_move_assign_container.h
--- a/libcxx/include/__type_traits/noexcept_move_assign_container.h
+++ b/libcxx/include/__type_traits/noexcept_move_assign_container.h
@@ -23,7 +23,7 @@
 template <typename _Alloc, typename _Traits=allocator_traits<_Alloc> >
 struct __noexcept_move_assign_container : public integral_constant<bool,
     _Traits::propagate_on_container_move_assignment::value
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
         || _Traits::is_always_equal::value
 #else
         && is_nothrow_move_assignable<_Alloc>::value
diff --git a/libcxx/include/__type_traits/rank.h b/libcxx/include/__type_traits/rank.h
--- a/libcxx/include/__type_traits/rank.h
+++ b/libcxx/include/__type_traits/rank.h
@@ -36,7 +36,7 @@
 
 #endif // __has_builtin(__array_rank)
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr size_t rank_v = rank<_Tp>::value;
 #endif
diff --git a/libcxx/include/__type_traits/remove_all_extents.h b/libcxx/include/__type_traits/remove_all_extents.h
--- a/libcxx/include/__type_traits/remove_all_extents.h
+++ b/libcxx/include/__type_traits/remove_all_extents.h
@@ -38,7 +38,7 @@
 using __remove_all_extents_t = typename remove_all_extents<_Tp>::type;
 #endif // __has_builtin(__remove_all_extents)
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp> using remove_all_extents_t = __remove_all_extents_t<_Tp>;
 #endif
 
diff --git a/libcxx/include/__type_traits/remove_const.h b/libcxx/include/__type_traits/remove_const.h
--- a/libcxx/include/__type_traits/remove_const.h
+++ b/libcxx/include/__type_traits/remove_const.h
@@ -33,7 +33,7 @@
 using __remove_const_t = typename remove_const<_Tp>::type;
 #endif // __has_builtin(__remove_const)
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp> using remove_const_t = __remove_const_t<_Tp>;
 #endif
 
diff --git a/libcxx/include/__type_traits/remove_cv.h b/libcxx/include/__type_traits/remove_cv.h
--- a/libcxx/include/__type_traits/remove_cv.h
+++ b/libcxx/include/__type_traits/remove_cv.h
@@ -35,7 +35,7 @@
 using __remove_cv_t = __remove_volatile_t<__remove_const_t<_Tp> >;
 #endif // __has_builtin(__remove_cv)
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp> using remove_cv_t = __remove_cv_t<_Tp>;
 #endif
 
diff --git a/libcxx/include/__type_traits/remove_cvref.h b/libcxx/include/__type_traits/remove_cvref.h
--- a/libcxx/include/__type_traits/remove_cvref.h
+++ b/libcxx/include/__type_traits/remove_cvref.h
@@ -31,7 +31,7 @@
 template <class _Tp, class _Up>
 struct __is_same_uncvref : _IsSame<__remove_cvref_t<_Tp>, __remove_cvref_t<_Up> > {};
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Tp>
 struct remove_cvref {
     using type _LIBCPP_NODEBUG = __remove_cvref_t<_Tp>;
diff --git a/libcxx/include/__type_traits/remove_extent.h b/libcxx/include/__type_traits/remove_extent.h
--- a/libcxx/include/__type_traits/remove_extent.h
+++ b/libcxx/include/__type_traits/remove_extent.h
@@ -38,7 +38,7 @@
 using __remove_extent_t = typename remove_extent<_Tp>::type;
 #endif // __has_builtin(__remove_extent)
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp> using remove_extent_t = __remove_extent_t<_Tp>;
 #endif
 
diff --git a/libcxx/include/__type_traits/remove_pointer.h b/libcxx/include/__type_traits/remove_pointer.h
--- a/libcxx/include/__type_traits/remove_pointer.h
+++ b/libcxx/include/__type_traits/remove_pointer.h
@@ -36,7 +36,7 @@
 using __remove_pointer_t = typename remove_pointer<_Tp>::type;
 #endif // __has_builtin(__remove_pointer)
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp> using remove_pointer_t = __remove_pointer_t<_Tp>;
 #endif
 
diff --git a/libcxx/include/__type_traits/remove_reference.h b/libcxx/include/__type_traits/remove_reference.h
--- a/libcxx/include/__type_traits/remove_reference.h
+++ b/libcxx/include/__type_traits/remove_reference.h
@@ -35,7 +35,7 @@
 using __libcpp_remove_reference_t = typename remove_reference<_Tp>::type;
 #endif // __has_builtin(__remove_reference_t)
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp> using remove_reference_t = __libcpp_remove_reference_t<_Tp>;
 #endif
 
diff --git a/libcxx/include/__type_traits/remove_volatile.h b/libcxx/include/__type_traits/remove_volatile.h
--- a/libcxx/include/__type_traits/remove_volatile.h
+++ b/libcxx/include/__type_traits/remove_volatile.h
@@ -33,7 +33,7 @@
 using __remove_volatile_t = typename remove_volatile<_Tp>::type;
 #endif // __has_builtin(__remove_volatile)
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp> using remove_volatile_t = __remove_volatile_t<_Tp>;
 #endif
 
diff --git a/libcxx/include/__type_traits/result_of.h b/libcxx/include/__type_traits/result_of.h
--- a/libcxx/include/__type_traits/result_of.h
+++ b/libcxx/include/__type_traits/result_of.h
@@ -29,9 +29,9 @@
 {
 };
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp> using result_of_t _LIBCPP_DEPRECATED_IN_CXX17 = typename result_of<_Tp>::type;
-#endif // _LIBCPP_STD_VER > 11
+#endif // _LIBCPP_STD_VER >= 14
 #endif // _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS)
 
 _LIBCPP_END_NAMESPACE_STD
diff --git a/libcxx/include/__type_traits/type_identity.h b/libcxx/include/__type_traits/type_identity.h
--- a/libcxx/include/__type_traits/type_identity.h
+++ b/libcxx/include/__type_traits/type_identity.h
@@ -23,7 +23,7 @@
 template <class _Tp>
 using __type_identity_t _LIBCPP_NODEBUG = typename __type_identity<_Tp>::type;
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template<class _Tp> struct type_identity { typedef _Tp type; };
 template<class _Tp> using type_identity_t = typename type_identity<_Tp>::type;
 #endif
diff --git a/libcxx/include/__type_traits/underlying_type.h b/libcxx/include/__type_traits/underlying_type.h
--- a/libcxx/include/__type_traits/underlying_type.h
+++ b/libcxx/include/__type_traits/underlying_type.h
@@ -32,7 +32,7 @@
 template <class _Tp>
 struct underlying_type : __underlying_type_impl<_Tp, is_enum<_Tp>::value> {};
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp> using underlying_type_t = typename underlying_type<_Tp>::type;
 #endif
 
diff --git a/libcxx/include/__type_traits/void_t.h b/libcxx/include/__type_traits/void_t.h
--- a/libcxx/include/__type_traits/void_t.h
+++ b/libcxx/include/__type_traits/void_t.h
@@ -17,7 +17,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class...> using void_t = void;
 #endif
 
diff --git a/libcxx/include/__utility/as_const.h b/libcxx/include/__utility/as_const.h
--- a/libcxx/include/__utility/as_const.h
+++ b/libcxx/include/__utility/as_const.h
@@ -20,7 +20,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr add_const_t<_Tp>& as_const(_Tp& __t) noexcept { return __t; }
 
diff --git a/libcxx/include/__utility/cmp.h b/libcxx/include/__utility/cmp.h
--- a/libcxx/include/__utility/cmp.h
+++ b/libcxx/include/__utility/cmp.h
@@ -28,7 +28,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template<class _Tp, class... _Up>
 struct _IsSameAsAny : _Or<_IsSame<_Tp, _Up>...> {};
 
@@ -102,7 +102,7 @@
   return _VSTD::cmp_less_equal(__u, numeric_limits<_Tp>::max()) &&
          _VSTD::cmp_greater_equal(__u, numeric_limits<_Tp>::min());
 }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__utility/exchange.h b/libcxx/include/__utility/exchange.h
--- a/libcxx/include/__utility/exchange.h
+++ b/libcxx/include/__utility/exchange.h
@@ -21,7 +21,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template<class _T1, class _T2 = _T1>
 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
 _T1 exchange(_T1& __obj, _T2&& __new_value)
@@ -31,7 +31,7 @@
     __obj = _VSTD::forward<_T2>(__new_value);
     return __old_value;
 }
-#endif // _LIBCPP_STD_VER > 11
+#endif // _LIBCPP_STD_VER >= 14
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__utility/forward_like.h b/libcxx/include/__utility/forward_like.h
--- a/libcxx/include/__utility/forward_like.h
+++ b/libcxx/include/__utility/forward_like.h
@@ -22,7 +22,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
 
 template <class _Ap, class _Bp>
 using _CopyConst = _If<is_const_v<_Ap>, const _Bp, _Bp>;
@@ -39,7 +39,7 @@
   return static_cast<_ForwardLike<_Tp, _Up>>(__ux);
 }
 
-#endif // _LIBCPP_STD_VER > 20
+#endif // _LIBCPP_STD_VER >= 23
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__utility/in_place.h b/libcxx/include/__utility/in_place.h
--- a/libcxx/include/__utility/in_place.h
+++ b/libcxx/include/__utility/in_place.h
@@ -19,7 +19,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 struct _LIBCPP_TYPE_VIS in_place_t {
     explicit in_place_t() = default;
@@ -52,7 +52,7 @@
 template <class _Tp>
 using __is_inplace_index = __is_inplace_index_imp<__remove_cvref_t<_Tp>>;
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__utility/integer_sequence.h b/libcxx/include/__utility/integer_sequence.h
--- a/libcxx/include/__utility/integer_sequence.h
+++ b/libcxx/include/__utility/integer_sequence.h
@@ -85,7 +85,7 @@
 
 #endif
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 
 template<class _Tp, _Tp... _Ip>
 struct _LIBCPP_TEMPLATE_VIS integer_sequence
@@ -138,15 +138,15 @@
 template<class... _Tp>
     using index_sequence_for = make_index_sequence<sizeof...(_Tp)>;
 
-#  if _LIBCPP_STD_VER > 17
+#  if _LIBCPP_STD_VER >= 20
 // Executes __func for every element in an index_sequence.
 template <size_t... _Index, class _Function>
 _LIBCPP_HIDE_FROM_ABI constexpr void __for_each_index_sequence(index_sequence<_Index...>, _Function __func) {
     (__func.template operator()<_Index>(), ...);
 }
-#  endif // _LIBCPP_STD_VER > 17
+#  endif // _LIBCPP_STD_VER >= 20
 
-#endif // _LIBCPP_STD_VER > 11
+#endif // _LIBCPP_STD_VER >= 14
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__utility/pair.h b/libcxx/include/__utility/pair.h
--- a/libcxx/include/__utility/pair.h
+++ b/libcxx/include/__utility/pair.h
@@ -417,7 +417,7 @@
 #endif
 };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template<class _T1, class _T2>
 pair(_T1, _T2) -> pair<_T1, _T2>;
 #endif
@@ -655,7 +655,7 @@
     return __get_pair<_Ip>::get(std::move(__p));
 }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _T1, class _T2>
 inline _LIBCPP_HIDE_FROM_ABI
 constexpr _T1 & get(pair<_T1, _T2>& __p) _NOEXCEPT
@@ -712,7 +712,7 @@
     return __get_pair<1>::get(std::move(__p));
 }
 
-#endif // _LIBCPP_STD_VER > 11
+#endif // _LIBCPP_STD_VER >= 14
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/__utility/to_underlying.h b/libcxx/include/__utility/to_underlying.h
--- a/libcxx/include/__utility/to_underlying.h
+++ b/libcxx/include/__utility/to_underlying.h
@@ -27,7 +27,7 @@
 }
 #endif // !_LIBCPP_CXX03_LANG
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
 template <class _Tp>
 _LIBCPP_NODISCARD_EXT _LIBCPP_INLINE_VISIBILITY constexpr underlying_type_t<_Tp>
 to_underlying(_Tp __val) noexcept {
diff --git a/libcxx/include/__utility/unreachable.h b/libcxx/include/__utility/unreachable.h
--- a/libcxx/include/__utility/unreachable.h
+++ b/libcxx/include/__utility/unreachable.h
@@ -23,7 +23,7 @@
     __builtin_unreachable();
 }
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
 
 [[noreturn]] _LIBCPP_HIDE_FROM_ABI inline void unreachable() { __libcpp_unreachable(); }
 
diff --git a/libcxx/include/__variant/monostate.h b/libcxx/include/__variant/monostate.h
--- a/libcxx/include/__variant/monostate.h
+++ b/libcxx/include/__variant/monostate.h
@@ -21,19 +21,19 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 struct _LIBCPP_TEMPLATE_VIS monostate {};
 
 _LIBCPP_HIDE_FROM_ABI constexpr bool operator==(monostate, monostate) noexcept { return true; }
 
-#  if _LIBCPP_STD_VER > 17
+#  if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_HIDE_FROM_ABI constexpr strong_ordering operator<=>(monostate, monostate) noexcept {
   return strong_ordering::equal;
 }
 
-#  else // _LIBCPP_STD_VER > 17
+#  else // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_HIDE_FROM_ABI constexpr bool operator!=(monostate, monostate) noexcept { return false; }
 
@@ -45,7 +45,7 @@
 
 _LIBCPP_HIDE_FROM_ABI constexpr bool operator>=(monostate, monostate) noexcept { return true; }
 
-#  endif // _LIBCPP_STD_VER > 17
+#  endif // _LIBCPP_STD_VER >= 20
 
 template <>
 struct _LIBCPP_TEMPLATE_VIS hash<monostate> {
@@ -57,7 +57,7 @@
   }
 };
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/any b/libcxx/include/any
--- a/libcxx/include/any
+++ b/libcxx/include/any
@@ -111,7 +111,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 _LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
 _LIBCPP_AVAILABILITY_THROW_BAD_ANY_CAST
@@ -692,7 +692,7 @@
     return nullptr;
 }
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/array b/libcxx/include/array
--- a/libcxx/include/array
+++ b/libcxx/include/array
@@ -376,7 +376,7 @@
 };
 
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template<class _Tp, class... _Args,
          class = enable_if_t<__all<_IsSame<_Tp, _Args>::value...>::value>
          >
@@ -489,7 +489,7 @@
     return _VSTD::move(__a.__elems_[_Ip]);
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <typename _Tp, size_t _Size, size_t... _Index>
 _LIBCPP_INLINE_VISIBILITY constexpr array<remove_cv_t<_Tp>, _Size>
@@ -528,7 +528,7 @@
                                        make_index_sequence<_Size>());
 }
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/atomic b/libcxx/include/atomic
--- a/libcxx/include/atomic
+++ b/libcxx/include/atomic
@@ -586,7 +586,7 @@
 
 typedef underlying_type<__legacy_memory_order>::type __memory_order_underlying_t;
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 enum class memory_order : __memory_order_underlying_t {
   relaxed = __mo_relaxed,
@@ -615,7 +615,7 @@
   memory_order_seq_cst = __mo_seq_cst,
 } memory_order;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 template <typename _Tp> _LIBCPP_INLINE_VISIBILITY
 bool __cxx_nonatomic_compare_equal(_Tp const& __lhs, _Tp const& __rhs) {
@@ -1608,7 +1608,7 @@
     _LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY void notify_all() _NOEXCEPT
         {std::__cxx_atomic_notify_all(&__a_);}
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     _LIBCPP_INLINE_VISIBILITY constexpr
     __atomic_base() noexcept(is_nothrow_default_constructible_v<_Tp>) : __a_(_Tp()) {}
 #else
@@ -1720,7 +1720,7 @@
     typedef _Tp value_type;
     typedef value_type difference_type;
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     _LIBCPP_INLINE_VISIBILITY
     atomic() = default;
 #else
@@ -2390,7 +2390,7 @@
     void notify_all() _NOEXCEPT
         {__cxx_atomic_notify_all(&__a_);}
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     _LIBCPP_INLINE_VISIBILITY constexpr
     atomic_flag() _NOEXCEPT : __a_(false) {}
 #else
@@ -2656,11 +2656,11 @@
 #define ATOMIC_FLAG_INIT {false}
 #define ATOMIC_VAR_INIT(__v) {__v}
 
-#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS)
+#if _LIBCPP_STD_VER >= 20 && !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS)
 # if defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER >= 1400
 #  pragma clang deprecated(ATOMIC_VAR_INIT)
 # endif
-#endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS)
+#endif // _LIBCPP_STD_VER >= 20 && !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS)
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/charconv b/libcxx/include/charconv
--- a/libcxx/include/charconv
+++ b/libcxx/include/charconv
@@ -98,7 +98,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 to_chars_result to_chars(char*, char*, bool, int = 10) = delete;
 from_chars_result from_chars(const char*, const char*, bool, int = 10) = delete;
@@ -823,7 +823,7 @@
 _LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT _LIBCPP_FUNC_VIS
 to_chars_result to_chars(char* __first, char* __last, long double __value, chars_format __fmt, int __precision);
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/chrono b/libcxx/include/chrono
--- a/libcxx/include/chrono
+++ b/libcxx/include/chrono
@@ -775,7 +775,7 @@
 // [time.syn]
 #include <compare>
 
-#if !defined(_LIBCPP_HAS_NO_LOCALIZATION) && !defined(_LIBCPP_HAS_NO_INCOMPLETE_FORMAT) && _LIBCPP_STD_VER > 17
+#if !defined(_LIBCPP_HAS_NO_LOCALIZATION) && !defined(_LIBCPP_HAS_NO_INCOMPLETE_FORMAT) && _LIBCPP_STD_VER >= 20
 #  include <__chrono/formatter.h>
 #  include <__chrono/ostream.h>
 #  include <__chrono/parser_std_format_spec.h>
diff --git a/libcxx/include/cmath b/libcxx/include/cmath
--- a/libcxx/include/cmath
+++ b/libcxx/include/cmath
@@ -544,7 +544,7 @@
 using ::tgammal _LIBCPP_USING_IF_EXISTS;
 using ::truncl _LIBCPP_USING_IF_EXISTS;
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 inline _LIBCPP_INLINE_VISIBILITY float       hypot(       float __x,       float __y,       float __z ) { return sqrt(__x*__x + __y*__y + __z*__z); }
 inline _LIBCPP_INLINE_VISIBILITY double      hypot(      double __x,      double __y,      double __z ) { return sqrt(__x*__x + __y*__y + __z*__z); }
 inline _LIBCPP_INLINE_VISIBILITY long double hypot( long double __x, long double __y, long double __z ) { return sqrt(__x*__x + __y*__y + __z*__z); }
@@ -783,7 +783,7 @@
   return __builtin_scalbn(__x, __exp);
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <typename _Fp>
 _LIBCPP_HIDE_FROM_ABI constexpr
 _Fp __lerp(_Fp __a, _Fp __b, _Fp __t) noexcept {
@@ -824,7 +824,7 @@
                     _IsSame<_A3, __result_type>::value));
     return std::__lerp((__result_type)__a, (__result_type)__b, (__result_type)__t);
 }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/complex b/libcxx/include/complex
--- a/libcxx/include/complex
+++ b/libcxx/include/complex
@@ -1522,7 +1522,7 @@
 }
 #endif // !_LIBCPP_HAS_NO_LOCALIZATION
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 // Literal suffix for complex number literals [complex.literals]
 inline namespace literals
 {
diff --git a/libcxx/include/cstddef b/libcxx/include/cstddef
--- a/libcxx/include/cstddef
+++ b/libcxx/include/cstddef
@@ -66,7 +66,7 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 namespace std  // purposefully not versioned
 {
 enum class byte : unsigned char {};
diff --git a/libcxx/include/cstdlib b/libcxx/include/cstdlib
--- a/libcxx/include/cstdlib
+++ b/libcxx/include/cstdlib
@@ -144,7 +144,7 @@
 using ::at_quick_exit _LIBCPP_USING_IF_EXISTS;
 using ::quick_exit _LIBCPP_USING_IF_EXISTS;
 #endif
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 using ::aligned_alloc _LIBCPP_USING_IF_EXISTS;
 #endif
 
diff --git a/libcxx/include/ctime b/libcxx/include/ctime
--- a/libcxx/include/ctime
+++ b/libcxx/include/ctime
@@ -66,7 +66,7 @@
 using ::size_t _LIBCPP_USING_IF_EXISTS;
 using ::time_t _LIBCPP_USING_IF_EXISTS;
 using ::tm _LIBCPP_USING_IF_EXISTS;
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 using ::timespec _LIBCPP_USING_IF_EXISTS;
 #endif
 using ::clock _LIBCPP_USING_IF_EXISTS;
@@ -78,7 +78,7 @@
 using ::gmtime _LIBCPP_USING_IF_EXISTS;
 using ::localtime _LIBCPP_USING_IF_EXISTS;
 using ::strftime _LIBCPP_USING_IF_EXISTS;
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 using ::timespec_get _LIBCPP_USING_IF_EXISTS;
 #endif
 
diff --git a/libcxx/include/deque b/libcxx/include/deque
--- a/libcxx/include/deque
+++ b/libcxx/include/deque
@@ -249,7 +249,7 @@
     typedef _Reference                  reference;
 
     _LIBCPP_HIDE_FROM_ABI __deque_iterator() _NOEXCEPT
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
      : __m_iter_(nullptr), __ptr_(nullptr)
 #endif
      {}
@@ -564,7 +564,7 @@
         : __map_(__pointer_allocator(__a)), __start_(0), __size_(0, __a) {}
 
     explicit _LIBCPP_HIDE_FROM_ABI deque(size_type __n);
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     explicit _LIBCPP_HIDE_FROM_ABI deque(size_type __n, const _Allocator& __a);
 #endif
     _LIBCPP_HIDE_FROM_ABI deque(size_type __n, const value_type& __v);
@@ -713,7 +713,7 @@
     _LIBCPP_HIDE_FROM_ABI void push_front(const value_type& __v);
     _LIBCPP_HIDE_FROM_ABI void push_back(const value_type& __v);
 #ifndef _LIBCPP_CXX03_LANG
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     template <class... _Args> _LIBCPP_HIDE_FROM_ABI reference emplace_front(_Args&&... __args);
     template <class... _Args> _LIBCPP_HIDE_FROM_ABI reference emplace_back (_Args&&... __args);
 #else
@@ -952,7 +952,7 @@
         __append(__n);
 }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp, class _Allocator>
 deque<_Tp, _Allocator>::deque(size_type __n, const _Allocator& __a)
     : __map_(__pointer_allocator(__a)), __start_(0), __size_(0, __a)
@@ -1314,7 +1314,7 @@
 
 template <class _Tp, class _Allocator>
 template <class... _Args>
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 typename deque<_Tp, _Allocator>::reference
 #else
 void
@@ -1328,7 +1328,7 @@
     __alloc_traits::construct(__a, _VSTD::addressof(*end()),
                               _VSTD::forward<_Args>(__args)...);
     ++__size();
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     return *--end();
 #endif
 }
@@ -1349,7 +1349,7 @@
 
 template <class _Tp, class _Allocator>
 template <class... _Args>
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 typename deque<_Tp, _Allocator>::reference
 #else
 void
@@ -1363,7 +1363,7 @@
     __alloc_traits::construct(__a, _VSTD::addressof(*--begin()), _VSTD::forward<_Args>(__args)...);
     --__start_;
     ++__size();
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     return *begin();
 #endif
 }
@@ -2391,7 +2391,7 @@
     __x.swap(__y);
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Tp, class _Allocator, class _Up>
 inline _LIBCPP_HIDE_FROM_ABI typename deque<_Tp, _Allocator>::size_type
 erase(deque<_Tp, _Allocator>& __c, const _Up& __v) {
@@ -2415,11 +2415,11 @@
 inline constexpr bool __format::__enable_insertable<std::deque<wchar_t>> = true;
 #endif
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 _LIBCPP_BEGIN_NAMESPACE_STD
 namespace pmr {
 template <class _ValueT>
diff --git a/libcxx/include/experimental/functional b/libcxx/include/experimental/functional
--- a/libcxx/include/experimental/functional
+++ b/libcxx/include/experimental/functional
@@ -90,7 +90,7 @@
 #  define _LIBCPP_DEPRECATED_BOYER_MOORE_HORSPOOL_SEARCHER _LIBCPP_DEPRECATED_("std::experimental::boyer_moore_horspool_searcher will be removed in LLVM 17. Use std::boyer_moore_horspool_searcher instead")
 #endif
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 // default searcher
 template<class _ForwardIterator, class _BinaryPredicate = equal_to<>>
 class _LIBCPP_DEPRECATED_DEFAULT_SEARCHER _LIBCPP_TEMPLATE_VIS default_searcher {
@@ -427,7 +427,7 @@
     return boyer_moore_horspool_searcher<_RandomAccessIterator, _Hash, _BinaryPredicate>(__f, __l, __hf, __p);
 }
 
-#endif // _LIBCPP_STD_VER > 11
+#endif // _LIBCPP_STD_VER >= 14
 
 _LIBCPP_END_NAMESPACE_LFTS
 
diff --git a/libcxx/include/experimental/iterator b/libcxx/include/experimental/iterator
--- a/libcxx/include/experimental/iterator
+++ b/libcxx/include/experimental/iterator
@@ -65,7 +65,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 
 _LIBCPP_BEGIN_NAMESPACE_LFTS
 
@@ -117,7 +117,7 @@
 
 _LIBCPP_END_NAMESPACE_LFTS
 
-#endif // _LIBCPP_STD_VER > 11
+#endif // _LIBCPP_STD_VER >= 14
 
 #if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
 #  include <type_traits>
diff --git a/libcxx/include/experimental/propagate_const b/libcxx/include/experimental/propagate_const
--- a/libcxx/include/experimental/propagate_const
+++ b/libcxx/include/experimental/propagate_const
@@ -120,7 +120,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 
 _LIBCPP_BEGIN_NAMESPACE_LFTS_V2
 
@@ -577,5 +577,5 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 11
+#endif // _LIBCPP_STD_VER >= 14
 #endif // _LIBCPP_EXPERIMENTAL_PROPAGATE_CONST
diff --git a/libcxx/include/experimental/type_traits b/libcxx/include/experimental/type_traits
--- a/libcxx/include/experimental/type_traits
+++ b/libcxx/include/experimental/type_traits
@@ -71,7 +71,7 @@
 #include <__assert> // all public C++ headers provide the assertion handler
 #include <experimental/__config>
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 
 #include <initializer_list>
 #include <type_traits>
@@ -150,6 +150,6 @@
 
 _LIBCPP_END_NAMESPACE_LFTS
 
-#endif /* _LIBCPP_STD_VER > 11 */
+#endif /* _LIBCPP_STD_VER >= 14 */
 
 #endif /* _LIBCPP_EXPERIMENTAL_TYPE_TRAITS */
diff --git a/libcxx/include/forward_list b/libcxx/include/forward_list
--- a/libcxx/include/forward_list
+++ b/libcxx/include/forward_list
@@ -671,7 +671,7 @@
 
     typedef typename base::iterator       iterator;
     typedef typename base::const_iterator const_iterator;
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     typedef size_type                                __remove_return_type;
 #else
     typedef void                                     __remove_return_type;
@@ -684,7 +684,7 @@
     _LIBCPP_INLINE_VISIBILITY
     explicit forward_list(const allocator_type& __a);
     explicit forward_list(size_type __n);
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     explicit forward_list(size_type __n, const allocator_type& __a);
 #endif
     forward_list(size_type __n, const value_type& __v);
@@ -787,7 +787,7 @@
     const_reference front() const {return base::__before_begin()->__next_->__value_;}
 
 #ifndef _LIBCPP_CXX03_LANG
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     template <class... _Args> reference emplace_front(_Args&&... __args);
 #else
     template <class... _Args> void      emplace_front(_Args&&... __args);
@@ -927,7 +927,7 @@
     }
 }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp, class _Alloc>
 forward_list<_Tp, _Alloc>::forward_list(size_type __n,
                                         const allocator_type& __base_alloc)
@@ -1119,7 +1119,7 @@
 
 template <class _Tp, class _Alloc>
 template <class... _Args>
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 typename forward_list<_Tp, _Alloc>::reference
 #else
 void
@@ -1133,7 +1133,7 @@
                                   _VSTD::forward<_Args>(__args)...);
     __h->__next_ = base::__before_begin()->__next_;
     base::__before_begin()->__next_ = __h.release();
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     return base::__before_begin()->__next_->__value_;
 #endif
 }
@@ -1761,7 +1761,7 @@
     __x.swap(__y);
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Tp, class _Allocator, class _Predicate>
 inline _LIBCPP_INLINE_VISIBILITY
     typename forward_list<_Tp, _Allocator>::size_type
@@ -1779,7 +1779,7 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 _LIBCPP_BEGIN_NAMESPACE_STD
 namespace pmr {
 template <class _ValueT>
diff --git a/libcxx/include/iomanip b/libcxx/include/iomanip
--- a/libcxx/include/iomanip
+++ b/libcxx/include/iomanip
@@ -624,7 +624,7 @@
 
 #endif // _LIBCPP_STD_VER >= 11
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 
 template <class _CharT>
 _LIBCPP_HIDE_FROM_ABI
@@ -656,7 +656,7 @@
     return __quoted_output_proxy<_CharT, _Traits>(__sv.data(), __sv.data() + __sv.size(), __delim, __escape);
 }
 
-#endif // _LIBCPP_STD_VER > 11
+#endif // _LIBCPP_STD_VER >= 14
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/istream b/libcxx/include/istream
--- a/libcxx/include/istream
+++ b/libcxx/include/istream
@@ -572,7 +572,7 @@
     return __is;
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template<class _CharT, class _Traits, size_t _Np>
 inline _LIBCPP_INLINE_VISIBILITY
@@ -630,7 +630,7 @@
     return __is >> (char*)__s;
 }
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 template<class _CharT, class _Traits>
 _LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>&
diff --git a/libcxx/include/list b/libcxx/include/list
--- a/libcxx/include/list
+++ b/libcxx/include/list
@@ -835,7 +835,7 @@
     typedef typename base::const_iterator                  const_iterator;
     typedef _VSTD::reverse_iterator<iterator>              reverse_iterator;
     typedef _VSTD::reverse_iterator<const_iterator>        const_reverse_iterator;
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     typedef size_type                                      __remove_return_type;
 #else
     typedef void                                           __remove_return_type;
@@ -857,7 +857,7 @@
         _VSTD::__debug_db_insert_c(this);
     }
     explicit list(size_type __n);
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     explicit list(size_type __n, const allocator_type& __a);
 #endif
     list(size_type __n, const value_type& __x);
@@ -986,13 +986,13 @@
     void push_back(value_type&& __x);
 
     template <class... _Args>
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
        reference emplace_front(_Args&&... __args);
 #else
        void      emplace_front(_Args&&... __args);
 #endif
     template <class... _Args>
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
         reference emplace_back(_Args&&... __args);
 #else
        void       emplace_back(_Args&&... __args);
@@ -1200,7 +1200,7 @@
 #endif
 }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp, class _Alloc>
 list<_Tp, _Alloc>::list(size_type __n, const allocator_type& __a) : base(__a)
 {
@@ -1563,7 +1563,7 @@
 
 template <class _Tp, class _Alloc>
 template <class... _Args>
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 typename list<_Tp, _Alloc>::reference
 #else
 void
@@ -1575,7 +1575,7 @@
     __node_alloc_traits::construct(__na, _VSTD::addressof(__hold->__value_), _VSTD::forward<_Args>(__args)...);
     __link_nodes_at_front(__hold.get()->__as_link(), __hold.get()->__as_link());
     ++base::__sz();
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     return __hold.release()->__value_;
 #else
     __hold.release();
@@ -1584,7 +1584,7 @@
 
 template <class _Tp, class _Alloc>
 template <class... _Args>
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 typename list<_Tp, _Alloc>::reference
 #else
 void
@@ -1597,7 +1597,7 @@
     __link_pointer __nl = __hold->__as_link();
     __link_nodes_at_back(__nl, __nl);
     ++base::__sz();
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     return __hold.release()->__value_;
 #else
     __hold.release();
@@ -2338,7 +2338,7 @@
     __x.swap(__y);
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Tp, class _Allocator, class _Predicate>
 inline _LIBCPP_INLINE_VISIBILITY typename list<_Tp, _Allocator>::size_type
 erase_if(list<_Tp, _Allocator>& __c, _Predicate __pred) {
@@ -2358,11 +2358,11 @@
 inline constexpr bool __format::__enable_insertable<std::list<wchar_t>> = true;
 #endif
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 _LIBCPP_BEGIN_NAMESPACE_STD
 namespace pmr {
 template <class _ValueT>
diff --git a/libcxx/include/map b/libcxx/include/map
--- a/libcxx/include/map
+++ b/libcxx/include/map
@@ -601,7 +601,7 @@
       swap(static_cast<_Compare&>(*this), static_cast<_Compare&>(__y));
     }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     bool operator()(const _K2& __x, const _CP& __y) const
@@ -647,7 +647,7 @@
         swap(__comp_, __y.__comp_);
     }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     bool operator()(const _K2& __x, const _CP& __y) const
@@ -742,7 +742,7 @@
     _LIBCPP_INLINE_VISIBILITY
     value_type& __get_value()
     {
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
         return *_VSTD::launder(_VSTD::addressof(__cc_));
 #else
         return __cc_;
@@ -752,7 +752,7 @@
     _LIBCPP_INLINE_VISIBILITY
     const value_type& __get_value() const
     {
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
         return *_VSTD::launder(_VSTD::addressof(__cc_));
 #else
         return __cc_;
@@ -1020,7 +1020,7 @@
     typedef _VSTD::reverse_iterator<iterator>               reverse_iterator;
     typedef _VSTD::reverse_iterator<const_iterator>         const_reverse_iterator;
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     typedef __map_node_handle<typename __base::__node, allocator_type> node_type;
     typedef __insert_return_type<iterator, node_type> insert_return_type;
 #endif
@@ -1067,7 +1067,7 @@
             insert(__f, __l);
         }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <class _InputIterator>
     _LIBCPP_INLINE_VISIBILITY
     map(_InputIterator __f, _InputIterator __l, const allocator_type& __a)
@@ -1130,7 +1130,7 @@
             insert(__il.begin(), __il.end());
         }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     _LIBCPP_INLINE_VISIBILITY
     map(initializer_list<value_type> __il, const allocator_type& __a)
         : map(__il, key_compare(), __a) {}
@@ -1273,7 +1273,7 @@
                 insert(__e.__i_, *__f);
         }
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
     template <class... _Args>
         _LIBCPP_INLINE_VISIBILITY
@@ -1367,7 +1367,7 @@
       return __r;
     }
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
     _LIBCPP_INLINE_VISIBILITY
     iterator erase(const_iterator __p) {return __tree_.erase(__p.__i_);}
@@ -1382,7 +1382,7 @@
     _LIBCPP_INLINE_VISIBILITY
     void clear() _NOEXCEPT {__tree_.clear();}
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     _LIBCPP_INLINE_VISIBILITY
     insert_return_type insert(node_type&& __nh)
     {
@@ -1452,7 +1452,7 @@
     iterator find(const key_type& __k)             {return __tree_.find(__k);}
     _LIBCPP_INLINE_VISIBILITY
     const_iterator find(const key_type& __k) const {return __tree_.find(__k);}
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     __enable_if_t<__is_transparent<_Compare, _K2>::value, iterator>
@@ -1466,21 +1466,21 @@
     _LIBCPP_INLINE_VISIBILITY
     size_type      count(const key_type& __k) const
         {return __tree_.__count_unique(__k);}
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     __enable_if_t<__is_transparent<_Compare, _K2>::value, size_type>
     count(const _K2& __k) const {return __tree_.__count_multi(__k);}
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     _LIBCPP_INLINE_VISIBILITY
     bool contains(const key_type& __k) const {return find(__k) != end();}
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     __enable_if_t<__is_transparent<_Compare, _K2>::value, bool>
     contains(const _K2& __k) const { return find(__k) != end(); }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
     _LIBCPP_INLINE_VISIBILITY
     iterator lower_bound(const key_type& __k)
@@ -1488,7 +1488,7 @@
     _LIBCPP_INLINE_VISIBILITY
     const_iterator lower_bound(const key_type& __k) const
         {return __tree_.lower_bound(__k);}
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     __enable_if_t<__is_transparent<_Compare, _K2>::value, iterator>
@@ -1506,7 +1506,7 @@
     _LIBCPP_INLINE_VISIBILITY
     const_iterator upper_bound(const key_type& __k) const
         {return __tree_.upper_bound(__k);}
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     __enable_if_t<__is_transparent<_Compare, _K2>::value, iterator>
@@ -1523,7 +1523,7 @@
     _LIBCPP_INLINE_VISIBILITY
     pair<const_iterator,const_iterator> equal_range(const key_type& __k) const
         {return __tree_.__equal_range_unique(__k);}
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     __enable_if_t<__is_transparent<_Compare, _K2>::value, pair<iterator,iterator>>
@@ -1732,7 +1732,7 @@
     __x.swap(__y);
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Key, class _Tp, class _Compare, class _Allocator,
           class _Predicate>
 inline _LIBCPP_INLINE_VISIBILITY
@@ -1800,7 +1800,7 @@
     typedef _VSTD::reverse_iterator<iterator>               reverse_iterator;
     typedef _VSTD::reverse_iterator<const_iterator>         const_reverse_iterator;
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     typedef __map_node_handle<typename __base::__node, allocator_type> node_type;
 #endif
 
@@ -1846,7 +1846,7 @@
             insert(__f, __l);
         }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <class _InputIterator>
     _LIBCPP_INLINE_VISIBILITY
     multimap(_InputIterator __f, _InputIterator __l, const allocator_type& __a)
@@ -1910,7 +1910,7 @@
             insert(__il.begin(), __il.end());
         }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     _LIBCPP_INLINE_VISIBILITY
     multimap(initializer_list<value_type> __il, const allocator_type& __a)
         : multimap(__il, key_compare(), __a) {}
@@ -2053,7 +2053,7 @@
     iterator  erase(const_iterator __f, const_iterator __l)
         {return __tree_.erase(__f.__i_, __l.__i_);}
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     _LIBCPP_INLINE_VISIBILITY
     iterator insert(node_type&& __nh)
     {
@@ -2127,7 +2127,7 @@
     iterator find(const key_type& __k)             {return __tree_.find(__k);}
     _LIBCPP_INLINE_VISIBILITY
     const_iterator find(const key_type& __k) const {return __tree_.find(__k);}
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     __enable_if_t<__is_transparent<_Compare, _K2>::value, iterator>
@@ -2141,21 +2141,21 @@
     _LIBCPP_INLINE_VISIBILITY
     size_type      count(const key_type& __k) const
         {return __tree_.__count_multi(__k);}
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     __enable_if_t<__is_transparent<_Compare, _K2>::value, size_type>
     count(const _K2& __k) const {return __tree_.__count_multi(__k);}
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     _LIBCPP_INLINE_VISIBILITY
     bool contains(const key_type& __k) const {return find(__k) != end();}
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     __enable_if_t<__is_transparent<_Compare, _K2>::value, bool>
     contains(const _K2& __k) const { return find(__k) != end(); }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
     _LIBCPP_INLINE_VISIBILITY
     iterator lower_bound(const key_type& __k)
@@ -2163,7 +2163,7 @@
     _LIBCPP_INLINE_VISIBILITY
     const_iterator lower_bound(const key_type& __k) const
             {return __tree_.lower_bound(__k);}
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     __enable_if_t<__is_transparent<_Compare, _K2>::value, iterator>
@@ -2181,7 +2181,7 @@
     _LIBCPP_INLINE_VISIBILITY
     const_iterator upper_bound(const key_type& __k) const
             {return __tree_.upper_bound(__k);}
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     __enable_if_t<__is_transparent<_Compare, _K2>::value, iterator>
@@ -2198,7 +2198,7 @@
     _LIBCPP_INLINE_VISIBILITY
     pair<const_iterator,const_iterator> equal_range(const key_type& __k) const
             {return __tree_.__equal_range_multi(__k);}
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     __enable_if_t<__is_transparent<_Compare, _K2>::value, pair<iterator,iterator>>
@@ -2326,7 +2326,7 @@
     __x.swap(__y);
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Key, class _Tp, class _Compare, class _Allocator,
           class _Predicate>
 inline _LIBCPP_INLINE_VISIBILITY
@@ -2339,7 +2339,7 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 _LIBCPP_BEGIN_NAMESPACE_STD
 namespace pmr {
 template <class _KeyT, class _ValueT, class _CompareT = std::less<_KeyT>>
diff --git a/libcxx/include/mutex b/libcxx/include/mutex
--- a/libcxx/include/mutex
+++ b/libcxx/include/mutex
@@ -467,7 +467,7 @@
 
 #endif // _LIBCPP_CXX03_LANG
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class ..._Mutexes>
 class _LIBCPP_TEMPLATE_VIS scoped_lock;
 
@@ -544,7 +544,7 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(scoped_lock);
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 #endif // !_LIBCPP_HAS_NO_THREADS
 
 struct _LIBCPP_TEMPLATE_VIS once_flag;
diff --git a/libcxx/include/new b/libcxx/include/new
--- a/libcxx/include/new
+++ b/libcxx/include/new
@@ -189,14 +189,14 @@
 #endif
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 // Enable the declaration even if the compiler doesn't support the language
 // feature.
 struct destroying_delete_t {
   explicit destroying_delete_t() = default;
 };
 inline constexpr destroying_delete_t destroying_delete{};
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 } // namespace std
 
@@ -341,7 +341,7 @@
     return __builtin_launder(__p);
 }
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 _LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_HIDE_FROM_ABI
 constexpr _Tp* launder(_Tp* __p) noexcept
@@ -350,7 +350,7 @@
 }
 #endif
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 #if defined(__GCC_DESTRUCTIVE_SIZE) && defined(__GCC_CONSTRUCTIVE_SIZE)
 
@@ -359,7 +359,7 @@
 
 #endif // defined(__GCC_DESTRUCTIVE_SIZE) && defined(__GCC_CONSTRUCTIVE_SIZE)
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/numbers b/libcxx/include/numbers
--- a/libcxx/include/numbers
+++ b/libcxx/include/numbers
@@ -63,7 +63,7 @@
 #include <__config>
 #include <version>
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -128,7 +128,7 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 #if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
 #  include <concepts>
diff --git a/libcxx/include/optional b/libcxx/include/optional
--- a/libcxx/include/optional
+++ b/libcxx/include/optional
@@ -200,7 +200,7 @@
 
 } // namespace std
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -259,7 +259,7 @@
         :  __val_(_VSTD::forward<_Args>(__args)...),
            __engaged_(true) {}
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
   template <class _Fp, class... _Args>
   _LIBCPP_HIDE_FROM_ABI
   constexpr __optional_destruct_base(__optional_construct_from_invoke_tag, _Fp&& __f, _Args&&... __args)
@@ -301,7 +301,7 @@
         :  __val_(_VSTD::forward<_Args>(__args)...),
            __engaged_(true) {}
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
   template <class _Fp, class... _Args>
   _LIBCPP_HIDE_FROM_ABI
   constexpr __optional_destruct_base(__optional_construct_from_invoke_tag, _Fp&& __f, _Args&&... __args)
@@ -357,7 +357,7 @@
     _LIBCPP_CONSTEXPR_SINCE_CXX20 void __construct(_Args&&... __args)
     {
         _LIBCPP_ASSERT(!has_value(), "__construct called for engaged __optional_storage");
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
         _VSTD::construct_at(_VSTD::addressof(this->__val_), _VSTD::forward<_Args>(__args)...);
 #else
         ::new ((void*)_VSTD::addressof(this->__val_)) value_type(_VSTD::forward<_Args>(__args)...);
@@ -805,7 +805,7 @@
         this->__construct_from(_VSTD::move(__v));
     }
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
   template<class _Fp, class... _Args>
   _LIBCPP_HIDE_FROM_ABI
   constexpr explicit optional(__optional_construct_from_invoke_tag, _Fp&& __f, _Args&&... __args)
@@ -1047,7 +1047,7 @@
                                   static_cast<value_type>(_VSTD::forward<_Up>(__v));
     }
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
   template<class _Func>
   _LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_THROW_BAD_OPTIONAL_ACCESS
   constexpr auto and_then(_Func&& __f) & {
@@ -1171,7 +1171,7 @@
       return _VSTD::move(*this);
     return _VSTD::forward<_Func>(__f)();
   }
-#endif // _LIBCPP_STD_VER > 20
+#endif // _LIBCPP_STD_VER >= 23
 
     using __base::reset;
 };
@@ -1572,7 +1572,7 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 #if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
 #  include <atomic>
diff --git a/libcxx/include/ostream b/libcxx/include/ostream
--- a/libcxx/include/ostream
+++ b/libcxx/include/ostream
@@ -244,7 +244,7 @@
     basic_ostream& operator<<(long double __f);
     basic_ostream& operator<<(const void* __p);
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
     _LIBCPP_HIDE_FROM_ABI
     basic_ostream& operator<<(const volatile void* __p) {
         return operator<<(const_cast<const void*>(__p));
@@ -253,7 +253,7 @@
 
     basic_ostream& operator<<(basic_streambuf<char_type, traits_type>* __sb);
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 // LWG 2221 - nullptr. This is not backported to older standards modes.
 // See https://reviews.llvm.org/D127033 for more info on the rationale.
     _LIBCPP_INLINE_VISIBILITY
@@ -1130,7 +1130,7 @@
                          std::use_facet<ctype<_CharT> >(__os.getloc()).widen('1'));
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
 template <class _Traits>
@@ -1179,7 +1179,7 @@
 template <class _Traits>
 basic_ostream<char, _Traits>& operator<<(basic_ostream<char, _Traits>&, const char32_t*) = delete;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ostream<char>;
 #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
diff --git a/libcxx/include/queue b/libcxx/include/queue
--- a/libcxx/include/queue
+++ b/libcxx/include/queue
@@ -278,7 +278,7 @@
     _LIBCPP_INLINE_VISIBILITY
     queue(const queue& __q) : c(__q.c) {}
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
     template <class _InputIterator,
               class = __enable_if_t<__is_cpp17_input_iterator<_InputIterator>::value>>
     _LIBCPP_HIDE_FROM_ABI
@@ -363,7 +363,7 @@
     void push(value_type&& __v)      {c.push_back(_VSTD::move(__v));}
     template <class... _Args>
         _LIBCPP_INLINE_VISIBILITY
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
         decltype(auto) emplace(_Args&&... __args)
             { return c.emplace_back(_VSTD::forward<_Args>(__args)...);}
 #else
@@ -397,7 +397,7 @@
     operator< (const queue<_T1, _C1>& __x,const queue<_T1, _C1>& __y);
 };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template<class _Container,
          class = enable_if_t<!__is_allocator<_Container>::value>
 >
@@ -413,7 +413,7 @@
     -> queue<typename _Container::value_type, _Container>;
 #endif
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
 template <class _InputIterator,
           class = __enable_if_t<__is_cpp17_input_iterator<_InputIterator>::value>>
 queue(_InputIterator, _InputIterator)
diff --git a/libcxx/include/ratio b/libcxx/include/ratio
--- a/libcxx/include/ratio
+++ b/libcxx/include/ratio
@@ -501,7 +501,7 @@
                   __static_lcm<_R1::den, _R2::den>::value> type;
 };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _R1, class _R2>
 inline constexpr bool ratio_equal_v = ratio_equal<_R1, _R2>::value;
 
diff --git a/libcxx/include/regex b/libcxx/include/regex
--- a/libcxx/include/regex
+++ b/libcxx/include/regex
@@ -6214,7 +6214,7 @@
     return __r;
 }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _ST, class _SA, class _Ap, class _Cp, class _Tp>
 bool
 regex_search(const basic_string<_Cp, _ST, _SA>&& __s,
@@ -6277,7 +6277,7 @@
     return _VSTD::regex_match(__s.begin(), __s.end(), __m, __e, __flags);
 }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _ST, class _SA, class _Allocator, class _CharT, class _Traits>
 inline _LIBCPP_INLINE_VISIBILITY
 bool
@@ -6350,7 +6350,7 @@
                    const regex_type& __re,
                    regex_constants::match_flag_type __m
                                               = regex_constants::match_default);
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     regex_iterator(_BidirectionalIterator __a, _BidirectionalIterator __b,
                    const regex_type&& __re,
                    regex_constants::match_flag_type __m
@@ -6482,7 +6482,7 @@
                          const regex_type& __re, int __submatch = 0,
                          regex_constants::match_flag_type __m =
                                                 regex_constants::match_default);
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     regex_token_iterator(_BidirectionalIterator __a, _BidirectionalIterator __b,
                          const regex_type&& __re, int __submatch = 0,
                          regex_constants::match_flag_type __m =
@@ -6493,7 +6493,7 @@
                          const regex_type& __re, const vector<int>& __submatches,
                          regex_constants::match_flag_type __m =
                                                 regex_constants::match_default);
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     regex_token_iterator(_BidirectionalIterator __a, _BidirectionalIterator __b,
                          const regex_type&& __re, const vector<int>& __submatches,
                          regex_constants::match_flag_type __m =
@@ -6507,7 +6507,7 @@
                          regex_constants::match_flag_type __m =
                                                 regex_constants::match_default);
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     regex_token_iterator(_BidirectionalIterator __a, _BidirectionalIterator __b,
                          const regex_type&& __re,
                          initializer_list<int> __submatches,
@@ -6522,7 +6522,7 @@
                              const int (&__submatches)[_Np],
                              regex_constants::match_flag_type __m =
                                                 regex_constants::match_default);
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <size_t _Np>
         regex_token_iterator(_BidirectionalIterator __a,
                              _BidirectionalIterator __b,
@@ -6844,7 +6844,7 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 _LIBCPP_BEGIN_NAMESPACE_STD
 namespace pmr {
 template <class _BidirT>
diff --git a/libcxx/include/scoped_allocator b/libcxx/include/scoped_allocator
--- a/libcxx/include/scoped_allocator
+++ b/libcxx/include/scoped_allocator
@@ -678,7 +678,7 @@
     template <class...> friend class __scoped_allocator_storage;
 };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template<class _OuterAlloc, class... _InnerAllocs>
     scoped_allocator_adaptor(_OuterAlloc, _InnerAllocs...)
         -> scoped_allocator_adaptor<_OuterAlloc, _InnerAllocs...>;
diff --git a/libcxx/include/set b/libcxx/include/set
--- a/libcxx/include/set
+++ b/libcxx/include/set
@@ -547,7 +547,7 @@
     typedef _VSTD::reverse_iterator<iterator>       reverse_iterator;
     typedef _VSTD::reverse_iterator<const_iterator> const_reverse_iterator;
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     typedef __set_node_handle<typename __base::__node, allocator_type> node_type;
     typedef __insert_return_type<iterator, node_type> insert_return_type;
 #endif
@@ -593,7 +593,7 @@
             insert(__f, __l);
         }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
         template <class _InputIterator>
         _LIBCPP_INLINE_VISIBILITY
         set(_InputIterator __f, _InputIterator __l, const allocator_type& __a)
@@ -650,7 +650,7 @@
             insert(__il.begin(), __il.end());
         }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     _LIBCPP_INLINE_VISIBILITY
     set(initializer_list<value_type> __il, const allocator_type& __a)
         : set(__il, key_compare(), __a) {}
@@ -767,7 +767,7 @@
     _LIBCPP_INLINE_VISIBILITY
     void clear() _NOEXCEPT {__tree_.clear();}
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     _LIBCPP_INLINE_VISIBILITY
     insert_return_type insert(node_type&& __nh)
     {
@@ -844,7 +844,7 @@
     iterator find(const key_type& __k)             {return __tree_.find(__k);}
     _LIBCPP_INLINE_VISIBILITY
     const_iterator find(const key_type& __k) const {return __tree_.find(__k);}
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
@@ -858,21 +858,21 @@
     _LIBCPP_INLINE_VISIBILITY
     size_type      count(const key_type& __k) const
         {return __tree_.__count_unique(__k);}
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     typename enable_if<__is_transparent<_Compare, _K2>::value,size_type>::type
     count(const _K2& __k) const                    {return __tree_.__count_multi(__k);}
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     _LIBCPP_INLINE_VISIBILITY
     bool contains(const key_type& __k) const {return find(__k) != end();}
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     typename enable_if<__is_transparent<_Compare, _K2>::value, bool>::type
     contains(const _K2& __k) const { return find(__k) != end(); }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
     _LIBCPP_INLINE_VISIBILITY
     iterator lower_bound(const key_type& __k)
@@ -880,7 +880,7 @@
     _LIBCPP_INLINE_VISIBILITY
     const_iterator lower_bound(const key_type& __k) const
         {return __tree_.lower_bound(__k);}
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
@@ -898,7 +898,7 @@
     _LIBCPP_INLINE_VISIBILITY
     const_iterator upper_bound(const key_type& __k) const
         {return __tree_.upper_bound(__k);}
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
@@ -915,7 +915,7 @@
     _LIBCPP_INLINE_VISIBILITY
     pair<const_iterator,const_iterator> equal_range(const key_type& __k) const
         {return __tree_.__equal_range_unique(__k);}
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     typename enable_if<__is_transparent<_Compare, _K2>::value,pair<iterator,iterator>>::type
@@ -1038,7 +1038,7 @@
     __x.swap(__y);
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Key, class _Compare, class _Allocator, class _Predicate>
 inline _LIBCPP_INLINE_VISIBILITY
     typename set<_Key, _Compare, _Allocator>::size_type
@@ -1084,7 +1084,7 @@
     typedef _VSTD::reverse_iterator<iterator>       reverse_iterator;
     typedef _VSTD::reverse_iterator<const_iterator> const_reverse_iterator;
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     typedef __set_node_handle<typename __base::__node, allocator_type> node_type;
 #endif
 
@@ -1121,7 +1121,7 @@
             insert(__f, __l);
         }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
         template <class _InputIterator>
         _LIBCPP_INLINE_VISIBILITY
         multiset(_InputIterator __f, _InputIterator __l, const allocator_type& __a)
@@ -1186,7 +1186,7 @@
             insert(__il.begin(), __il.end());
         }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     _LIBCPP_INLINE_VISIBILITY
     multiset(initializer_list<value_type> __il, const allocator_type& __a)
         : multiset(__il, key_compare(), __a) {}
@@ -1302,7 +1302,7 @@
     _LIBCPP_INLINE_VISIBILITY
     void clear() _NOEXCEPT {__tree_.clear();}
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     _LIBCPP_INLINE_VISIBILITY
     iterator insert(node_type&& __nh)
     {
@@ -1380,7 +1380,7 @@
     iterator find(const key_type& __k)             {return __tree_.find(__k);}
     _LIBCPP_INLINE_VISIBILITY
     const_iterator find(const key_type& __k) const {return __tree_.find(__k);}
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
@@ -1394,21 +1394,21 @@
     _LIBCPP_INLINE_VISIBILITY
     size_type      count(const key_type& __k) const
         {return __tree_.__count_multi(__k);}
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     typename enable_if<__is_transparent<_Compare, _K2>::value,size_type>::type
     count(const _K2& __k) const            {return __tree_.__count_multi(__k);}
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     _LIBCPP_INLINE_VISIBILITY
     bool contains(const key_type& __k) const {return find(__k) != end();}
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     typename enable_if<__is_transparent<_Compare, _K2>::value, bool>::type
     contains(const _K2& __k) const { return find(__k) != end(); }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
     _LIBCPP_INLINE_VISIBILITY
     iterator lower_bound(const key_type& __k)
@@ -1416,7 +1416,7 @@
     _LIBCPP_INLINE_VISIBILITY
     const_iterator lower_bound(const key_type& __k) const
             {return __tree_.lower_bound(__k);}
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
@@ -1434,7 +1434,7 @@
     _LIBCPP_INLINE_VISIBILITY
     const_iterator upper_bound(const key_type& __k) const
             {return __tree_.upper_bound(__k);}
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
@@ -1451,7 +1451,7 @@
     _LIBCPP_INLINE_VISIBILITY
     pair<const_iterator,const_iterator> equal_range(const key_type& __k) const
             {return __tree_.__equal_range_multi(__k);}
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     typename enable_if<__is_transparent<_Compare, _K2>::value,pair<iterator,iterator>>::type
@@ -1573,7 +1573,7 @@
     __x.swap(__y);
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Key, class _Compare, class _Allocator, class _Predicate>
 inline _LIBCPP_INLINE_VISIBILITY
     typename multiset<_Key, _Compare, _Allocator>::size_type
@@ -1584,7 +1584,7 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 _LIBCPP_BEGIN_NAMESPACE_STD
 namespace pmr {
 template <class _KeyT, class _CompareT = std::less<_KeyT>>
diff --git a/libcxx/include/shared_mutex b/libcxx/include/shared_mutex
--- a/libcxx/include/shared_mutex
+++ b/libcxx/include/shared_mutex
@@ -131,7 +131,7 @@
 #include <__undef_macros>
 
 
-#if _LIBCPP_STD_VER > 11 || defined(_LIBCPP_BUILDING_LIBRARY)
+#if _LIBCPP_STD_VER >= 14 || defined(_LIBCPP_BUILDING_LIBRARY)
 
 #include <__mutex_base>
 
@@ -177,7 +177,7 @@
 };
 
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 class _LIBCPP_TYPE_VIS _LIBCPP_AVAILABILITY_SHARED_MUTEX shared_mutex
 {
     __shared_mutex_base __base_;
@@ -502,7 +502,7 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 11
+#endif // _LIBCPP_STD_VER >= 14
 
 _LIBCPP_POP_MACROS
 
diff --git a/libcxx/include/span b/libcxx/include/span
--- a/libcxx/include/span
+++ b/libcxx/include/span
@@ -166,7 +166,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class _Tp>
 struct __is_std_array : false_type {};
@@ -566,10 +566,10 @@
 auto as_writable_bytes(span<_Tp, _Extent> __s) noexcept
 { return __s.__as_writable_bytes(); }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template<contiguous_iterator _It, class _EndOrSize>
     span(_It, _EndOrSize) -> span<remove_reference_t<iter_reference_t<_It>>>;
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 template<class _Tp, size_t _Sz>
     span(_Tp (&)[_Sz]) -> span<_Tp, _Sz>;
@@ -583,7 +583,7 @@
 template<ranges::contiguous_range _Range>
     span(_Range&&) -> span<remove_reference_t<ranges::range_reference_t<_Range>>>;
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/stack b/libcxx/include/stack
--- a/libcxx/include/stack
+++ b/libcxx/include/stack
@@ -204,7 +204,7 @@
             : c(_VSTD::move(__s.c), __a) {}
 #endif // _LIBCPP_CXX03_LANG
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
     template <class _InputIterator,
               class = __enable_if_t<__is_cpp17_input_iterator<_InputIterator>::value>>
     _LIBCPP_HIDE_FROM_ABI
@@ -235,7 +235,7 @@
 
     template <class... _Args>
         _LIBCPP_INLINE_VISIBILITY
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
         decltype(auto) emplace(_Args&&... __args)
         { return c.emplace_back(_VSTD::forward<_Args>(__args)...);}
 #else
@@ -268,7 +268,7 @@
     operator< (const stack<T1, _C1>& __x, const stack<T1, _C1>& __y);
 };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template<class _Container,
          class = enable_if_t<!__is_allocator<_Container>::value>
 >
@@ -284,7 +284,7 @@
     -> stack<typename _Container::value_type, _Container>;
 #endif
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
 template<class _InputIterator,
          class = __enable_if_t<__is_cpp17_input_iterator<_InputIterator>::value>>
 stack(_InputIterator, _InputIterator)
diff --git a/libcxx/include/stdatomic.h b/libcxx/include/stdatomic.h
--- a/libcxx/include/stdatomic.h
+++ b/libcxx/include/stdatomic.h
@@ -121,7 +121,7 @@
 #  pragma GCC system_header
 #endif
 
-#if defined(__cplusplus) && _LIBCPP_STD_VER > 20
+#if defined(__cplusplus) && _LIBCPP_STD_VER >= 23
 
 #include <atomic>
 #include <version>
@@ -230,6 +230,6 @@
 #   include_next <stdatomic.h>
 # endif
 
-#endif // defined(__cplusplus) && _LIBCPP_STD_VER > 20
+#endif // defined(__cplusplus) && _LIBCPP_STD_VER >= 23
 
 #endif // _LIBCPP_STDATOMIC_H
diff --git a/libcxx/include/string b/libcxx/include/string
--- a/libcxx/include/string
+++ b/libcxx/include/string
@@ -886,7 +886,7 @@
   template <class = __enable_if_t<__is_allocator<_Allocator>::value, nullptr_t> >
   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(const _CharT* __s, const _Allocator& __a);
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
   basic_string(nullptr_t) = delete;
 #endif
 
@@ -911,7 +911,7 @@
     std::__debug_db_insert_c(this);
   }
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
   _LIBCPP_HIDE_FROM_ABI constexpr
   basic_string(basic_string&& __str, size_type __pos, const _Allocator& __alloc = _Allocator())
       : basic_string(std::move(__str), __pos, npos, __alloc) {}
@@ -1030,7 +1030,7 @@
 #endif
     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
     basic_string& operator=(const value_type* __s) {return assign(__s);}
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
     basic_string& operator=(nullptr_t) = delete;
 #endif
     _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator=(value_type __c);
@@ -1097,7 +1097,7 @@
 
     _LIBCPP_CONSTEXPR_SINCE_CXX20 void reserve(size_type __requested_capacity);
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
     template <class _Op>
     _LIBCPP_HIDE_FROM_ABI constexpr
     void resize_and_overwrite(size_type __n, _Op __op) {
@@ -1460,7 +1460,7 @@
     const value_type* c_str() const _NOEXCEPT {return data();}
     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
     const value_type* data() const _NOEXCEPT  {return std::__to_address(__get_pointer());}
-#if _LIBCPP_STD_VER > 14 || defined(_LIBCPP_BUILDING_LIBRARY)
+#if _LIBCPP_STD_VER >= 17 || defined(_LIBCPP_BUILDING_LIBRARY)
     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
     value_type* data()             _NOEXCEPT  {return std::__to_address(__get_pointer());}
 #endif
@@ -1614,7 +1614,7 @@
     _LIBCPP_CONSTEXPR_SINCE_CXX20
     int compare(size_type __pos1, size_type __n1, const value_type* __s, size_type __n2) const;
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     constexpr _LIBCPP_HIDE_FROM_ABI
     bool starts_with(__self_view __sv) const noexcept
     { return __self_view(data(), size()).starts_with(__sv); }
@@ -1640,7 +1640,7 @@
     { return ends_with(__self_view(__s)); }
 #endif
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
     constexpr _LIBCPP_HIDE_FROM_ABI
     bool contains(__self_view __sv) const noexcept
     { return __self_view(data(), size()).contains(__sv); }
@@ -1683,7 +1683,7 @@
     }
 
     static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __begin_lifetime(pointer __begin, size_type __n) {
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
         if (__libcpp_is_constant_evaluated()) {
             for (size_type __i = 0; __i != __n; ++__i)
                 std::construct_at(std::addressof(__begin[__i]));
@@ -1691,7 +1691,7 @@
 #else
         (void)__begin;
         (void)__n;
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
     }
 
     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __default_init() {
@@ -1918,7 +1918,7 @@
         _NOEXCEPT_(__alloc_traits::is_always_equal::value);
     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
     void __move_assign(basic_string& __str, true_type)
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
         _NOEXCEPT;
 #else
         _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value);
@@ -2555,7 +2555,7 @@
 inline _LIBCPP_CONSTEXPR_SINCE_CXX20
 void
 basic_string<_CharT, _Traits, _Allocator>::__move_assign(basic_string& __str, true_type)
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     _NOEXCEPT
 #else
     _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value)
@@ -4010,7 +4010,7 @@
 operator==(const basic_string<_CharT, _Traits, _Allocator>& __lhs,
            const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT
 {
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     return basic_string_view<_CharT, _Traits>(__lhs) == basic_string_view<_CharT, _Traits>(__rhs);
 #else
     size_t __lhs_sz = __lhs.size();
@@ -4060,7 +4060,7 @@
 operator==(const basic_string<_CharT,_Traits,_Allocator>& __lhs,
            const _CharT* __rhs) _NOEXCEPT
 {
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     return basic_string_view<_CharT, _Traits>(__lhs) == basic_string_view<_CharT, _Traits>(__rhs);
 #else
     typedef basic_string<_CharT, _Traits, _Allocator> _String;
@@ -4071,7 +4071,7 @@
 #endif
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class _CharT, class _Traits, class _Allocator>
 _LIBCPP_HIDE_FROM_ABI constexpr auto operator<=>(
@@ -4086,7 +4086,7 @@
     return basic_string_view<_CharT, _Traits>(__lhs) <=> basic_string_view<_CharT, _Traits>(__rhs);
 }
 
-#else // _LIBCPP_STD_VER > 17
+#else // _LIBCPP_STD_VER >= 20
 
 template<class _CharT, class _Traits, class _Allocator>
 inline _LIBCPP_HIDE_FROM_ABI
@@ -4230,7 +4230,7 @@
 {
     return !(__lhs < __rhs);
 }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 // operator +
 
@@ -4504,7 +4504,7 @@
 getline(basic_istream<_CharT, _Traits>&& __is,
         basic_string<_CharT, _Traits, _Allocator>& __str);
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _CharT, class _Traits, class _Allocator, class _Up>
 inline _LIBCPP_HIDE_FROM_ABI
     typename basic_string<_CharT, _Traits, _Allocator>::size_type
@@ -4562,7 +4562,7 @@
 
 #endif // _LIBCPP_ENABLE_DEBUG_MODE
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 // Literal suffixes for basic_string [basic.string.literals]
 inline namespace literals
 {
@@ -4604,7 +4604,7 @@
   } // namespace string_literals
 } // namespace literals
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <>
 inline constexpr bool __format::__enable_insertable<std::basic_string<char>> = true;
 #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
diff --git a/libcxx/include/string_view b/libcxx/include/string_view
--- a/libcxx/include/string_view
+++ b/libcxx/include/string_view
@@ -298,12 +298,12 @@
     basic_string_view(const _CharT* __s, size_type __len) _NOEXCEPT
         : __data_(__s), __size_(__len)
     {
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     _LIBCPP_ASSERT(__len == 0 || __s != nullptr, "string_view::string_view(_CharT *, size_t): received nullptr");
 #endif
     }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     template <contiguous_iterator _It, sized_sentinel_for<_It> _End>
       requires (is_same_v<iter_value_t<_It>, _CharT> && !is_convertible_v<_End, size_type>)
     constexpr _LIBCPP_HIDE_FROM_ABI basic_string_view(_It __begin, _End __end)
@@ -311,9 +311,9 @@
     {
       _LIBCPP_ASSERT((__end - __begin) >= 0, "std::string_view::string_view(iterator, sentinel) received invalid range");
     }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
     template <class _Range>
       requires (
         !is_same_v<remove_cvref_t<_Range>, basic_string_view> &&
@@ -330,13 +330,13 @@
       )
     constexpr explicit _LIBCPP_HIDE_FROM_ABI
     basic_string_view(_Range&& __r) : __data_(ranges::data(__r)), __size_(ranges::size(__r)) {}
-#endif // _LIBCPP_STD_VER > 20
+#endif // _LIBCPP_STD_VER >= 23
 
     _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
     basic_string_view(const _CharT* __s)
         : __data_(__s), __size_(_VSTD::__char_traits_length_checked<_Traits>(__s)) {}
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
     basic_string_view(nullptr_t) = delete;
 #endif
 
@@ -691,7 +691,7 @@
             (data(), size(), __s, __pos, traits_type::length(__s));
     }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     constexpr _LIBCPP_INLINE_VISIBILITY
     bool starts_with(basic_string_view __s) const noexcept
     { return size() >= __s.size() && compare(0, __s.size(), __s) == 0; }
@@ -717,7 +717,7 @@
     { return ends_with(basic_string_view(__s)); }
 #endif
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
     constexpr _LIBCPP_INLINE_VISIBILITY
     bool contains(basic_string_view __sv) const noexcept
     { return find(__sv) != npos; }
@@ -737,23 +737,23 @@
 };
 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(basic_string_view);
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _CharT, class _Traits>
 inline constexpr bool ranges::enable_view<basic_string_view<_CharT, _Traits>> = true;
 
 template <class _CharT, class _Traits>
 inline constexpr bool ranges::enable_borrowed_range<basic_string_view<_CharT, _Traits> > = true;
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 // [string.view.deduct]
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <contiguous_iterator _It, sized_sentinel_for<_It> _End>
   basic_string_view(_It, _End) -> basic_string_view<iter_value_t<_It>>;
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
 template <ranges::contiguous_range _Range>
   basic_string_view(_Range) -> basic_string_view<ranges::range_value_t<_Range>>;
 #endif
@@ -790,11 +790,11 @@
     if (__lhs.size() != __rhs.size()) return false;
     return __lhs.compare(__rhs) == 0;
 }
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 // operator <=>
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 template <class _CharT, class _Traits>
 _LIBCPP_HIDE_FROM_ABI constexpr auto
@@ -824,7 +824,7 @@
     }
 }
 
-#else //  _LIBCPP_STD_VER > 17
+#else //  _LIBCPP_STD_VER >= 20
 
 // operator !=
 template<class _CharT, class _Traits>
@@ -957,7 +957,7 @@
     return __lhs.compare(__rhs) >= 0;
 }
 
-#endif //  _LIBCPP_STD_VER > 17
+#endif //  _LIBCPP_STD_VER >= 20
 
 template<class _CharT, class _Traits>
 _LIBCPP_HIDE_FROM_ABI basic_ostream<_CharT, _Traits>&
@@ -993,7 +993,7 @@
 struct hash<basic_string_view<wchar_t, char_traits<wchar_t> > > : __string_view_hash<wchar_t> {};
 #endif
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 inline namespace literals
 {
   inline namespace string_view_literals
diff --git a/libcxx/include/system_error b/libcxx/include/system_error
--- a/libcxx/include/system_error
+++ b/libcxx/include/system_error
@@ -172,7 +172,7 @@
 struct _LIBCPP_TEMPLATE_VIS is_error_code_enum
     : public false_type {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_error_code_enum_v = is_error_code_enum<_Tp>::value;
 #endif
@@ -183,7 +183,7 @@
 struct _LIBCPP_TEMPLATE_VIS is_error_condition_enum
     : public false_type {};
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr bool is_error_condition_enum_v = is_error_condition_enum<_Tp>::value;
 #endif
@@ -228,12 +228,12 @@
     _LIBCPP_INLINE_VISIBILITY
     bool operator==(const error_category& __rhs) const _NOEXCEPT {return this == &__rhs;}
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
     _LIBCPP_HIDE_FROM_ABI
     strong_ordering operator<=>(const error_category& __rhs) const noexcept {return compare_three_way()(this, std::addressof(__rhs));}
 
-#else // _LIBCPP_STD_VER > 17
+#else // _LIBCPP_STD_VER >= 20
 
     _LIBCPP_INLINE_VISIBILITY
     bool operator!=(const error_category& __rhs) const _NOEXCEPT {return !(*this == __rhs);}
@@ -241,7 +241,7 @@
     _LIBCPP_INLINE_VISIBILITY
     bool operator< (const error_category& __rhs) const _NOEXCEPT {return this < &__rhs;}
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
     friend class _LIBCPP_HIDDEN __do_message;
 };
diff --git a/libcxx/include/tuple b/libcxx/include/tuple
--- a/libcxx/include/tuple
+++ b/libcxx/include/tuple
@@ -865,7 +865,7 @@
         : __base_(allocator_arg_t(), __a, __t)
     { }
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
     // tuple(tuple<U...>&) constructors (including allocator_arg_t variants)
 
     template <class... _Up, enable_if_t<
@@ -879,7 +879,7 @@
     _LIBCPP_HIDE_FROM_ABI constexpr
         explicit(!(is_convertible_v<_Up&, _Tp> && ...))
     tuple(allocator_arg_t, const _Alloc& __alloc, tuple<_Up...>& __t) : __base_(allocator_arg_t(), __alloc, __t) {}
-#endif // _LIBCPP_STD_VER > 20
+#endif // _LIBCPP_STD_VER >= 23
 
     // tuple(tuple<U...>&&) constructors (including allocator_arg_t variants)
 
@@ -929,7 +929,7 @@
         : __base_(allocator_arg_t(), __a, _VSTD::move(__t))
     { }
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
     // tuple(const tuple<U...>&&) constructors (including allocator_arg_t variants)
 
     template <class... _Up, enable_if_t<
@@ -944,7 +944,7 @@
         explicit(!(is_convertible_v<const _Up&&, _Tp> && ...))
     tuple(allocator_arg_t, const _Alloc& __alloc, const tuple<_Up...>&& __t)
         : __base_(allocator_arg_t(), __alloc, std::move(__t)) {}
-#endif // _LIBCPP_STD_VER > 20
+#endif // _LIBCPP_STD_VER >= 23
 
     // tuple(const pair<U1, U2>&) constructors (including allocator_arg_t variants)
 
@@ -1018,7 +1018,7 @@
         : __base_(allocator_arg_t(), __a, __p)
     { }
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
     // tuple(pair<U1, U2>&) constructors (including allocator_arg_t variants)
 
     template <class _U1, class _U2, enable_if_t<
@@ -1082,7 +1082,7 @@
         : __base_(allocator_arg_t(), __a, _VSTD::move(__p))
     { }
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
     // tuple(const pair<U1, U2>&&) constructors (including allocator_arg_t variants)
 
     template <class _U1, class _U2, enable_if_t<
@@ -1097,7 +1097,7 @@
         explicit(!_BothImplicitlyConvertible<const pair<_U1, _U2>&&>::value)
     tuple(allocator_arg_t, const _Alloc& __alloc, const pair<_U1, _U2>&& __p)
         : __base_(allocator_arg_t(), __alloc, std::move(__p)) {}
-#endif // _LIBCPP_STD_VER > 20
+#endif // _LIBCPP_STD_VER >= 23
 
     // [tuple.assign]
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
@@ -1109,7 +1109,7 @@
         return *this;
     }
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
     _LIBCPP_HIDE_FROM_ABI constexpr
     const tuple& operator=(tuple const& __tuple) const
       requires (_And<is_copy_assignable<const _Tp>...>::value) {
@@ -1126,7 +1126,7 @@
                                          typename __make_tuple_indices<sizeof...(_Tp)>::type());
         return *this;
     }
-#endif // _LIBCPP_STD_VER > 20
+#endif // _LIBCPP_STD_VER >= 23
 
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
     tuple& operator=(_If<_And<is_move_assignable<_Tp>...>::value, tuple, __nat>&& __tuple)
@@ -1170,7 +1170,7 @@
     }
 
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
     template <class... _UTypes, enable_if_t<
         _And<_BoolConstant<sizeof...(_Tp) == sizeof...(_UTypes)>,
              is_assignable<const _Tp&, const _UTypes&>...>::value>* = nullptr>
@@ -1193,7 +1193,7 @@
                                          typename __make_tuple_indices<sizeof...(_Tp)>::type());
         return *this;
     }
-#endif // _LIBCPP_STD_VER > 20
+#endif // _LIBCPP_STD_VER >= 23
 
     template <template<class...> class Pred, bool _Const,
               class _Pair, class _DecayedPair = __remove_cvref_t<_Pair>, class _Tuple = tuple>
@@ -1212,7 +1212,7 @@
     template <bool _Const, class _Pair>
     struct _NothrowAssignFromPair : _AssignPredicateFromPair<is_nothrow_assignable, _Const, _Pair> {};
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
     template <class _U1, class _U2, enable_if_t<
         _EnableAssignFromPair<true, const pair<_U1, _U2>&>::value>* = nullptr>
     _LIBCPP_HIDE_FROM_ABI constexpr
@@ -1232,7 +1232,7 @@
         std::get<1>(*this) = std::move(__pair.second);
         return *this;
     }
-#endif // _LIBCPP_STD_VER > 20
+#endif // _LIBCPP_STD_VER >= 23
 
     template<class _Up1, class _Up2, __enable_if_t<
         _EnableAssignFromPair<false, pair<_Up1, _Up2> const&>::value
@@ -1296,12 +1296,12 @@
     void swap(tuple& __t) _NOEXCEPT_(__all<__is_nothrow_swappable<_Tp>::value...>::value)
         {__base_.swap(__t.__base_);}
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
     _LIBCPP_HIDE_FROM_ABI constexpr
     void swap(const tuple& __t) const noexcept(__all<is_nothrow_swappable_v<const _Tp&>...>::value) {
         __base_.swap(__t.__base_);
     }
-#endif // _LIBCPP_STD_VER > 20
+#endif // _LIBCPP_STD_VER >= 23
 };
 
 template <>
@@ -1324,12 +1324,12 @@
         tuple(allocator_arg_t, const _Alloc&, array<_Up, 0>) _NOEXCEPT {}
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
     void swap(tuple&) _NOEXCEPT {}
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
     _LIBCPP_HIDE_FROM_ABI constexpr void swap(const tuple&) const noexcept {}
 #endif
 };
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
 template <class... _TTypes, class... _UTypes, template<class> class _TQual, template<class> class _UQual>
     requires requires { typename tuple<common_reference_t<_TQual<_TTypes>, _UQual<_UTypes>>...>; }
 struct basic_common_reference<tuple<_TTypes...>, tuple<_UTypes...>, _TQual, _UQual> {
@@ -1341,9 +1341,9 @@
 struct common_type<tuple<_TTypes...>, tuple<_UTypes...>> {
     using type = tuple<common_type_t<_TTypes, _UTypes>...>;
 };
-#endif // _LIBCPP_STD_VER > 20
+#endif // _LIBCPP_STD_VER >= 23
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class ..._Tp>
 tuple(_Tp...) -> tuple<_Tp...>;
 template <class _Tp1, class _Tp2>
@@ -1363,7 +1363,7 @@
                  _NOEXCEPT_(__all<__is_nothrow_swappable<_Tp>::value...>::value)
     {__t.swap(__u);}
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
 template <class... _Tp>
 _LIBCPP_HIDE_FROM_ABI constexpr
 enable_if_t<__all<is_swappable_v<const _Tp>...>::value, void>
@@ -1413,7 +1413,7 @@
              static_cast<const __tuple_leaf<_Ip, type>&&>(__t.__base_).get());
 }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 
 namespace __find_detail {
 
@@ -1552,7 +1552,7 @@
     return __tuple_equal<sizeof...(_Tp)>()(__x, __y);
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 // operator<=>
 
@@ -1574,7 +1574,7 @@
     return _VSTD::__tuple_compare_three_way(__x, __y, index_sequence_for<_Tp...>{});
 }
 
-#else // _LIBCPP_STD_VER > 17
+#else // _LIBCPP_STD_VER >= 20
 
 template <class ..._Tp, class ..._Up>
 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
@@ -1644,7 +1644,7 @@
     return !(__y < __x);
 }
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
 // tuple_cat
 
@@ -1803,7 +1803,7 @@
 {
 }
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template <class _Tp>
 inline constexpr size_t tuple_size_v = tuple_size<_Tp>::value;
 
@@ -1845,7 +1845,7 @@
 
 #undef _LIBCPP_NOEXCEPT_RETURN
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 #endif // !defined(_LIBCPP_CXX03_LANG)
 
diff --git a/libcxx/include/typeindex b/libcxx/include/typeindex
--- a/libcxx/include/typeindex
+++ b/libcxx/include/typeindex
@@ -87,7 +87,7 @@
     _LIBCPP_INLINE_VISIBILITY
     bool operator>=(const type_index& __y) const _NOEXCEPT
         {return !__t_->before(*__y.__t_);}
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     _LIBCPP_HIDE_FROM_ABI
     strong_ordering operator<=>(const type_index& __y) const noexcept {
       if (*__t_ == *__y.__t_)
diff --git a/libcxx/include/unordered_map b/libcxx/include/unordered_map
--- a/libcxx/include/unordered_map
+++ b/libcxx/include/unordered_map
@@ -575,7 +575,7 @@
     _LIBCPP_INLINE_VISIBILITY
     size_t operator()(const _Key& __x) const
         {return static_cast<const _Hash&>(*this)(__x);}
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     size_t operator()(const _K2& __x) const
@@ -611,7 +611,7 @@
     _LIBCPP_INLINE_VISIBILITY
     size_t operator()(const _Key& __x) const
         {return __hash_(__x);}
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     size_t operator()(const _K2& __x) const
@@ -661,7 +661,7 @@
     _LIBCPP_INLINE_VISIBILITY
     bool operator()(const _Key& __x, const _Cp& __y) const
         {return static_cast<const _Pred&>(*this)(__x, __y.__get_value().first);}
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     bool operator()(const _Cp& __x, const _K2& __y) const
@@ -712,7 +712,7 @@
     _LIBCPP_INLINE_VISIBILITY
     bool operator()(const _Key& __x, const _Cp& __y) const
         {return __pred_(__x, __y.__get_value().first);}
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     template <typename _K2>
     _LIBCPP_INLINE_VISIBILITY
     bool operator()(const _Cp& __x, const _K2& __y) const
@@ -825,7 +825,7 @@
     _LIBCPP_INLINE_VISIBILITY
     value_type& __get_value()
     {
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
         return *_VSTD::launder(_VSTD::addressof(__cc_));
 #else
         return __cc_;
@@ -835,7 +835,7 @@
     _LIBCPP_INLINE_VISIBILITY
     const value_type& __get_value() const
     {
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
         return *_VSTD::launder(_VSTD::addressof(__cc_));
 #else
         return __cc_;
@@ -1075,7 +1075,7 @@
     typedef __hash_map_iterator<typename __table::local_iterator> local_iterator;
     typedef __hash_map_const_iterator<typename __table::const_local_iterator> const_local_iterator;
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     typedef __map_node_handle<__node, allocator_type> node_type;
     typedef __insert_return_type<iterator, node_type> insert_return_type;
 #endif
@@ -1123,7 +1123,7 @@
                   const hasher& __hf, const key_equal& __eql,
                   const allocator_type& __a);
 #endif // _LIBCPP_CXX03_LANG
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     _LIBCPP_INLINE_VISIBILITY
     unordered_map(size_type __n, const allocator_type& __a)
       : unordered_map(__n, hasher(), key_equal(), __a) {}
@@ -1270,7 +1270,7 @@
 
 #endif // _LIBCPP_CXX03_LANG
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     template <class... _Args>
         _LIBCPP_INLINE_VISIBILITY
         pair<iterator, bool> try_emplace(const key_type& __k, _Args&&... __args)
@@ -1350,7 +1350,7 @@
         // FIXME: Add debug mode checking for the iterator input
         return insert_or_assign(_VSTD::move(__k), _VSTD::forward<_Vp>(__v)).first;
      }
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
     _LIBCPP_INLINE_VISIBILITY
     iterator erase(const_iterator __p) {return __table_.erase(__p.__i_);}
@@ -1364,7 +1364,7 @@
     _LIBCPP_INLINE_VISIBILITY
         void clear() _NOEXCEPT {__table_.clear();}
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     _LIBCPP_INLINE_VISIBILITY
     insert_return_type insert(node_type&& __nh)
     {
@@ -1443,31 +1443,31 @@
     iterator       find(const key_type& __k)       {return __table_.find(__k);}
     _LIBCPP_INLINE_VISIBILITY
     const_iterator find(const key_type& __k) const {return __table_.find(__k);}
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     template <class _K2, enable_if_t<__is_transparent<hasher, _K2>::value && __is_transparent<key_equal, _K2>::value>* = nullptr>
     _LIBCPP_INLINE_VISIBILITY
     iterator       find(const _K2& __k)            {return __table_.find(__k);}
     template <class _K2, enable_if_t<__is_transparent<hasher, _K2>::value && __is_transparent<key_equal, _K2>::value>* = nullptr>
     _LIBCPP_INLINE_VISIBILITY
     const_iterator find(const _K2& __k) const      {return __table_.find(__k);}
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
     _LIBCPP_INLINE_VISIBILITY
     size_type count(const key_type& __k) const {return __table_.__count_unique(__k);}
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     template <class _K2, enable_if_t<__is_transparent<hasher, _K2>::value && __is_transparent<key_equal, _K2>::value>* = nullptr>
     _LIBCPP_INLINE_VISIBILITY
     size_type count(const _K2& __k) const      {return __table_.__count_unique(__k);}
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     _LIBCPP_INLINE_VISIBILITY
     bool contains(const key_type& __k) const {return find(__k) != end();}
 
     template <class _K2, enable_if_t<__is_transparent<hasher, _K2>::value && __is_transparent<key_equal, _K2>::value>* = nullptr>
     _LIBCPP_INLINE_VISIBILITY
     bool contains(const _K2& __k) const      {return find(__k) != end();}
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
     _LIBCPP_INLINE_VISIBILITY
     pair<iterator, iterator>             equal_range(const key_type& __k)
@@ -1475,7 +1475,7 @@
     _LIBCPP_INLINE_VISIBILITY
     pair<const_iterator, const_iterator> equal_range(const key_type& __k) const
         {return __table_.__equal_range_unique(__k);}
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     template <class _K2, enable_if_t<__is_transparent<hasher, _K2>::value && __is_transparent<key_equal, _K2>::value>* = nullptr>
     _LIBCPP_INLINE_VISIBILITY
     pair<iterator, iterator>             equal_range(const _K2& __k)
@@ -1484,7 +1484,7 @@
     _LIBCPP_INLINE_VISIBILITY
     pair<const_iterator, const_iterator> equal_range(const _K2& __k) const
         {return __table_.__equal_range_unique(__k);}
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
     mapped_type& operator[](const key_type& __k);
 #ifndef _LIBCPP_CXX03_LANG
@@ -1874,7 +1874,7 @@
     __x.swap(__y);
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc,
           class _Predicate>
 inline _LIBCPP_INLINE_VISIBILITY
@@ -1967,7 +1967,7 @@
     typedef __hash_map_iterator<typename __table::local_iterator> local_iterator;
     typedef __hash_map_const_iterator<typename __table::const_local_iterator> const_local_iterator;
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     typedef __map_node_handle<__node, allocator_type> node_type;
 #endif
 
@@ -2015,7 +2015,7 @@
                        const hasher& __hf, const key_equal& __eql,
                        const allocator_type& __a);
 #endif // _LIBCPP_CXX03_LANG
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     _LIBCPP_INLINE_VISIBILITY
     unordered_multimap(size_type __n, const allocator_type& __a)
       : unordered_multimap(__n, hasher(), key_equal(), __a) {}
@@ -2151,7 +2151,7 @@
     _LIBCPP_INLINE_VISIBILITY
     void clear() _NOEXCEPT {__table_.clear();}
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     _LIBCPP_INLINE_VISIBILITY
     iterator insert(node_type&& __nh)
     {
@@ -2230,31 +2230,31 @@
     iterator       find(const key_type& __k)       {return __table_.find(__k);}
     _LIBCPP_INLINE_VISIBILITY
     const_iterator find(const key_type& __k) const {return __table_.find(__k);}
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     template <class _K2, enable_if_t<__is_transparent<hasher, _K2>::value && __is_transparent<key_equal, _K2>::value>* = nullptr>
     _LIBCPP_INLINE_VISIBILITY
     iterator       find(const _K2& __k)            {return __table_.find(__k);}
     template <class _K2, enable_if_t<__is_transparent<hasher, _K2>::value && __is_transparent<key_equal, _K2>::value>* = nullptr>
     _LIBCPP_INLINE_VISIBILITY
     const_iterator find(const _K2& __k) const      {return __table_.find(__k);}
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
     _LIBCPP_INLINE_VISIBILITY
     size_type count(const key_type& __k) const {return __table_.__count_multi(__k);}
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     template <class _K2, enable_if_t<__is_transparent<hasher, _K2>::value && __is_transparent<key_equal, _K2>::value>* = nullptr>
     _LIBCPP_INLINE_VISIBILITY
     size_type count(const _K2& __k) const      {return __table_.__count_multi(__k);}
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     _LIBCPP_INLINE_VISIBILITY
     bool contains(const key_type& __k) const {return find(__k) != end();}
 
     template <class _K2, enable_if_t<__is_transparent<hasher, _K2>::value && __is_transparent<key_equal, _K2>::value>* = nullptr>
     _LIBCPP_INLINE_VISIBILITY
     bool contains(const _K2& __k) const      {return find(__k) != end();}
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
     _LIBCPP_INLINE_VISIBILITY
     pair<iterator, iterator>             equal_range(const key_type& __k)
@@ -2262,7 +2262,7 @@
     _LIBCPP_INLINE_VISIBILITY
     pair<const_iterator, const_iterator> equal_range(const key_type& __k) const
         {return __table_.__equal_range_multi(__k);}
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     template <class _K2, enable_if_t<__is_transparent<hasher, _K2>::value && __is_transparent<key_equal, _K2>::value>* = nullptr>
     _LIBCPP_INLINE_VISIBILITY
     pair<iterator, iterator>             equal_range(const _K2& __k)
@@ -2271,7 +2271,7 @@
     _LIBCPP_INLINE_VISIBILITY
     pair<const_iterator, const_iterator> equal_range(const _K2& __k) const
         {return __table_.__equal_range_multi(__k);}
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
     _LIBCPP_INLINE_VISIBILITY
     size_type bucket_count() const _NOEXCEPT {return __table_.bucket_count();}
@@ -2584,7 +2584,7 @@
     __x.swap(__y);
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc,
           class _Predicate>
 inline _LIBCPP_INLINE_VISIBILITY
@@ -2629,7 +2629,7 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 _LIBCPP_BEGIN_NAMESPACE_STD
 namespace pmr {
 template <class _KeyT, class _ValueT, class _HashT = std::hash<_KeyT>, class _PredT = std::equal_to<_KeyT>>
diff --git a/libcxx/include/unordered_set b/libcxx/include/unordered_set
--- a/libcxx/include/unordered_set
+++ b/libcxx/include/unordered_set
@@ -535,7 +535,7 @@
     typedef typename __table::const_local_iterator local_iterator;
     typedef typename __table::const_local_iterator const_local_iterator;
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     typedef __set_node_handle<typename __table::__node, allocator_type> node_type;
     typedef __insert_return_type<iterator, node_type> insert_return_type;
 #endif
@@ -553,7 +553,7 @@
     }
     explicit unordered_set(size_type __n, const hasher& __hf = hasher(),
                            const key_equal& __eql = key_equal());
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     inline _LIBCPP_INLINE_VISIBILITY
     unordered_set(size_type __n, const allocator_type& __a)
         : unordered_set(__n, hasher(), key_equal(), __a) {}
@@ -573,7 +573,7 @@
         unordered_set(_InputIterator __first, _InputIterator __last,
                       size_type __n, const hasher& __hf, const key_equal& __eql,
                       const allocator_type& __a);
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <class _InputIterator>
     inline _LIBCPP_INLINE_VISIBILITY
         unordered_set(_InputIterator __first, _InputIterator __last,
@@ -600,7 +600,7 @@
     unordered_set(initializer_list<value_type> __il, size_type __n,
                   const hasher& __hf, const key_equal& __eql,
                   const allocator_type& __a);
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     inline _LIBCPP_INLINE_VISIBILITY
     unordered_set(initializer_list<value_type> __il, size_type __n,
                                                       const allocator_type& __a)
@@ -711,7 +711,7 @@
     _LIBCPP_INLINE_VISIBILITY
     void clear() _NOEXCEPT {__table_.clear();}
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     _LIBCPP_INLINE_VISIBILITY
     insert_return_type insert(node_type&& __nh)
     {
@@ -787,31 +787,31 @@
     iterator       find(const key_type& __k)       {return __table_.find(__k);}
     _LIBCPP_INLINE_VISIBILITY
     const_iterator find(const key_type& __k) const {return __table_.find(__k);}
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     template <class _K2, enable_if_t<__is_transparent<hasher, _K2>::value && __is_transparent<key_equal, _K2>::value>* = nullptr>
     _LIBCPP_INLINE_VISIBILITY
     iterator       find(const _K2& __k)            {return __table_.find(__k);}
     template <class _K2, enable_if_t<__is_transparent<hasher, _K2>::value && __is_transparent<key_equal, _K2>::value>* = nullptr>
     _LIBCPP_INLINE_VISIBILITY
     const_iterator find(const _K2& __k) const      {return __table_.find(__k);}
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
     _LIBCPP_INLINE_VISIBILITY
     size_type count(const key_type& __k) const {return __table_.__count_unique(__k);}
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     template <class _K2, enable_if_t<__is_transparent<hasher, _K2>::value && __is_transparent<key_equal, _K2>::value>* = nullptr>
     _LIBCPP_INLINE_VISIBILITY
     size_type count(const _K2& __k) const      {return __table_.__count_unique(__k);}
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     _LIBCPP_INLINE_VISIBILITY
     bool contains(const key_type& __k) const {return find(__k) != end();}
 
     template <class _K2, enable_if_t<__is_transparent<hasher, _K2>::value && __is_transparent<key_equal, _K2>::value>* = nullptr>
     _LIBCPP_INLINE_VISIBILITY
     bool contains(const _K2& __k) const      {return find(__k) != end();}
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
     _LIBCPP_INLINE_VISIBILITY
     pair<iterator, iterator>             equal_range(const key_type& __k)
@@ -819,7 +819,7 @@
     _LIBCPP_INLINE_VISIBILITY
     pair<const_iterator, const_iterator> equal_range(const key_type& __k) const
         {return __table_.__equal_range_unique(__k);}
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     template <class _K2, enable_if_t<__is_transparent<hasher, _K2>::value && __is_transparent<key_equal, _K2>::value>* = nullptr>
     _LIBCPP_INLINE_VISIBILITY
     pair<iterator, iterator>             equal_range(const _K2& __k)
@@ -828,7 +828,7 @@
     _LIBCPP_INLINE_VISIBILITY
     pair<const_iterator, const_iterator> equal_range(const _K2& __k) const
         {return __table_.__equal_range_unique(__k);}
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
     _LIBCPP_INLINE_VISIBILITY
     size_type bucket_count() const _NOEXCEPT {return __table_.bucket_count();}
@@ -1120,7 +1120,7 @@
     __x.swap(__y);
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Value, class _Hash, class _Pred, class _Alloc,
           class _Predicate>
 inline _LIBCPP_INLINE_VISIBILITY
@@ -1191,7 +1191,7 @@
     typedef typename __table::const_local_iterator local_iterator;
     typedef typename __table::const_local_iterator const_local_iterator;
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     typedef __set_node_handle<typename __table::__node, allocator_type> node_type;
 #endif
 
@@ -1210,7 +1210,7 @@
                                 const key_equal& __eql = key_equal());
     unordered_multiset(size_type __n, const hasher& __hf,
                        const key_equal& __eql, const allocator_type& __a);
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     inline _LIBCPP_INLINE_VISIBILITY
     unordered_multiset(size_type __n, const allocator_type& __a)
         : unordered_multiset(__n, hasher(), key_equal(), __a) {}
@@ -1228,7 +1228,7 @@
         unordered_multiset(_InputIterator __first, _InputIterator __last,
                       size_type __n , const hasher& __hf,
                       const key_equal& __eql, const allocator_type& __a);
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <class _InputIterator>
     inline _LIBCPP_INLINE_VISIBILITY
     unordered_multiset(_InputIterator __first, _InputIterator __last,
@@ -1256,7 +1256,7 @@
     unordered_multiset(initializer_list<value_type> __il, size_type __n,
                        const hasher& __hf, const key_equal& __eql,
                        const allocator_type& __a);
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     inline _LIBCPP_INLINE_VISIBILITY
     unordered_multiset(initializer_list<value_type> __il, size_type __n, const allocator_type& __a)
       : unordered_multiset(__il, __n, hasher(), key_equal(), __a) {}
@@ -1338,7 +1338,7 @@
         _LIBCPP_INLINE_VISIBILITY
         void insert(_InputIterator __first, _InputIterator __last);
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     _LIBCPP_INLINE_VISIBILITY
     iterator insert(node_type&& __nh)
     {
@@ -1425,31 +1425,31 @@
     iterator       find(const key_type& __k)       {return __table_.find(__k);}
     _LIBCPP_INLINE_VISIBILITY
     const_iterator find(const key_type& __k) const {return __table_.find(__k);}
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     template<class _K2, enable_if_t<__is_transparent<hasher, _K2>::value && __is_transparent<key_equal, _K2>::value>* = nullptr>
     _LIBCPP_INLINE_VISIBILITY
     iterator       find(const _K2& __k)            {return __table_.find(__k);}
     template<class _K2, enable_if_t<__is_transparent<hasher, _K2>::value && __is_transparent<key_equal, _K2>::value>* = nullptr>
     _LIBCPP_INLINE_VISIBILITY
     const_iterator find(const _K2& __k) const      {return __table_.find(__k);}
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
     _LIBCPP_INLINE_VISIBILITY
     size_type count(const key_type& __k) const {return __table_.__count_multi(__k);}
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     template<class _K2, enable_if_t<__is_transparent<hasher, _K2>::value && __is_transparent<key_equal, _K2>::value>* = nullptr>
     _LIBCPP_INLINE_VISIBILITY
     size_type count(const _K2& __k) const      {return __table_.__count_multi(__k);}
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     _LIBCPP_INLINE_VISIBILITY
     bool contains(const key_type& __k) const {return find(__k) != end();}
 
     template<class _K2, enable_if_t<__is_transparent<hasher, _K2>::value && __is_transparent<key_equal, _K2>::value>* = nullptr>
     _LIBCPP_INLINE_VISIBILITY
     bool contains(const _K2& __k) const      {return find(__k) != end();}
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
     _LIBCPP_INLINE_VISIBILITY
     pair<iterator, iterator>             equal_range(const key_type& __k)
@@ -1457,7 +1457,7 @@
     _LIBCPP_INLINE_VISIBILITY
     pair<const_iterator, const_iterator> equal_range(const key_type& __k) const
         {return __table_.__equal_range_multi(__k);}
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
     template<class _K2, enable_if_t<__is_transparent<hasher, _K2>::value && __is_transparent<key_equal, _K2>::value>* = nullptr>
     _LIBCPP_INLINE_VISIBILITY
     pair<iterator, iterator>             equal_range(const _K2& __k)
@@ -1466,7 +1466,7 @@
     _LIBCPP_INLINE_VISIBILITY
     pair<const_iterator, const_iterator> equal_range(const _K2& __k) const
         {return __table_.__equal_range_multi(__k);}
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
     _LIBCPP_INLINE_VISIBILITY
     size_type bucket_count() const _NOEXCEPT {return __table_.bucket_count();}
@@ -1758,7 +1758,7 @@
     __x.swap(__y);
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Value, class _Hash, class _Pred, class _Alloc,
           class _Predicate>
 inline _LIBCPP_INLINE_VISIBILITY
@@ -1803,7 +1803,7 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 _LIBCPP_BEGIN_NAMESPACE_STD
 namespace pmr {
 template <class _KeyT, class _HashT = std::hash<_KeyT>, class _PredT = std::equal_to<_KeyT>>
diff --git a/libcxx/include/valarray b/libcxx/include/valarray
--- a/libcxx/include/valarray
+++ b/libcxx/include/valarray
@@ -1104,7 +1104,7 @@
     valarray& __assign_range(const value_type* __f, const value_type* __l);
 };
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 template<class _Tp, size_t _Size>
 valarray(const _Tp(&)[_Size], size_t) -> valarray<_Tp>;
 #endif
diff --git a/libcxx/include/variant b/libcxx/include/variant
--- a/libcxx/include/variant
+++ b/libcxx/include/variant
@@ -266,7 +266,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 
 // Light N-dimensional array of function pointers. Used in place of std::array to avoid
 // adding a dependency.
@@ -660,7 +660,7 @@
         _VSTD::forward<_Vs>(__vs)...);
   }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
   template <class _Rp, class _Visitor, class... _Vs>
   _LIBCPP_HIDE_FROM_ABI
   static constexpr _Rp __visit_value(_Visitor&& __visitor,
@@ -692,7 +692,7 @@
     _Visitor&& __visitor;
   };
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
   template <class _Rp, class _Visitor>
   struct __value_visitor_return_type {
     template <class... _Alts>
@@ -721,7 +721,7 @@
     return __value_visitor<_Visitor>{_VSTD::forward<_Visitor>(__visitor)};
   }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
   template <class _Rp, class _Visitor>
   _LIBCPP_HIDE_FROM_ABI
   static constexpr auto __make_value_visitor(_Visitor&& __visitor) {
@@ -1652,7 +1652,7 @@
   return __variant::__visit_value_at(__lhs.index(), __convert_to_bool<equal_to<>>{}, __lhs, __rhs);
 }
 
-#  if _LIBCPP_STD_VER > 17
+#  if _LIBCPP_STD_VER >= 20
 
 template <class... _Types> requires (three_way_comparable<_Types> && ...)
 _LIBCPP_HIDE_FROM_ABI constexpr common_comparison_category_t<compare_three_way_result_t<_Types>...>
@@ -1671,7 +1671,7 @@
   return __variant::__visit_value_at(__lhs.index(), __three_way, __lhs, __rhs);
 }
 
-#  endif // _LIBCPP_STD_VER > 17
+#  endif // _LIBCPP_STD_VER >= 20
 
 template <class... _Types>
 _LIBCPP_HIDE_FROM_ABI
@@ -1757,7 +1757,7 @@
                                   _VSTD::forward<_Vs>(__vs)...);
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <
     class _Rp, class _Visitor, class... _Vs,
     typename = void_t<decltype(_VSTD::__as_variant(std::declval<_Vs>()))...> >
@@ -1824,7 +1824,7 @@
   return std::__unchecked_get<__find_exactly_one_t<_Tp, _Types...>::value>(__v);
 }
 
-#endif // _LIBCPP_STD_VER > 14
+#endif // _LIBCPP_STD_VER >= 17
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/include/vector b/libcxx/include/vector
--- a/libcxx/include/vector
+++ b/libcxx/include/vector
@@ -389,7 +389,7 @@
         std::__debug_db_insert_c(this);
     }
     _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI explicit vector(size_type __n);
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI explicit vector(size_type __n, const allocator_type& __a);
 #endif
     _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI vector(size_type __n, const value_type& __x);
@@ -474,7 +474,7 @@
 
     _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI
     vector(vector&& __x)
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
         noexcept;
 #else
         _NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value);
@@ -594,7 +594,7 @@
 
     template <class... _Args>
     _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
         reference emplace_back(_Args&&... __args);
 #else
         void      emplace_back(_Args&&... __args);
@@ -1083,7 +1083,7 @@
     __guard.__complete();
 }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Tp, class _Allocator>
 _LIBCPP_CONSTEXPR_SINCE_CXX20
 vector<_Tp, _Allocator>::vector(size_type __n, const allocator_type& __a)
@@ -1216,7 +1216,7 @@
 _LIBCPP_CONSTEXPR_SINCE_CXX20
 inline _LIBCPP_HIDE_FROM_ABI
 vector<_Tp, _Allocator>::vector(vector&& __x)
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
         noexcept
 #else
         _NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value)
@@ -1588,7 +1588,7 @@
 template <class... _Args>
 _LIBCPP_CONSTEXPR_SINCE_CXX20
 inline
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 typename vector<_Tp, _Allocator>::reference
 #else
 void
@@ -1601,7 +1601,7 @@
     }
     else
         __emplace_back_slow_path(std::forward<_Args>(__args)...);
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     return this->back();
 #endif
 }
@@ -2123,7 +2123,7 @@
   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 ~vector() { __destroy_vector(*this)(); }
 
     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit vector(size_type __n);
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit vector(size_type __n, const allocator_type& __a);
 #endif
     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 vector(size_type __n, const value_type& __v);
@@ -2157,7 +2157,7 @@
 
     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
     vector(vector&& __v)
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
         noexcept;
 #else
         _NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value);
@@ -2254,16 +2254,16 @@
     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference back()  const {return __make_ref(__size_ - 1);}
 
     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void push_back(const value_type& __x);
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <class... _Args>
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference emplace_back(_Args&&... __args)
 #else
     _LIBCPP_HIDE_FROM_ABI void      emplace_back(_Args&&... __args)
 #endif
     {
         push_back ( value_type ( std::forward<_Args>(__args)... ));
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
         return this->back();
 #endif
     }
@@ -2271,7 +2271,7 @@
 
     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void pop_back() {--__size_;}
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
     template <class... _Args>
    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator emplace(const_iterator __position, _Args&&... __args)
         { return insert ( __position, value_type ( std::forward<_Args>(__args)... )); }
@@ -2550,7 +2550,7 @@
     }
 }
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 template <class _Allocator>
 _LIBCPP_CONSTEXPR_SINCE_CXX20
 vector<bool, _Allocator>::vector(size_type __n, const allocator_type& __a)
@@ -2772,7 +2772,7 @@
 
 template <class _Allocator>
 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 vector<bool, _Allocator>::vector(vector&& __v)
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
     _NOEXCEPT
 #else
     _NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value)
@@ -3293,7 +3293,7 @@
     __x.swap(__y);
 }
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 template <class _Tp, class _Allocator, class _Up>
 _LIBCPP_CONSTEXPR_SINCE_CXX20
 inline _LIBCPP_HIDE_FROM_ABI typename vector<_Tp, _Allocator>::size_type
@@ -3319,9 +3319,9 @@
 inline constexpr bool __format::__enable_insertable<vector<wchar_t>> = true;
 #endif
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
 template <class _Tp, class CharT>
 // Since is-vector-bool-reference is only used once it's inlined here.
   requires same_as<typename _Tp::__container, vector<bool, typename _Tp::__container::allocator_type>>
@@ -3340,11 +3340,11 @@
         return __underlying_.format(__ref, __ctx);
   }
 };
-#endif // _LIBCPP_STD_VER > 20
+#endif // _LIBCPP_STD_VER >= 23
 
 _LIBCPP_END_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 _LIBCPP_BEGIN_NAMESPACE_STD
 namespace pmr {
 template <class _ValueT>
diff --git a/libcxx/include/version b/libcxx/include/version
--- a/libcxx/include/version
+++ b/libcxx/include/version
@@ -208,7 +208,7 @@
 
 // clang-format off
 
-#if _LIBCPP_STD_VER > 11
+#if _LIBCPP_STD_VER >= 14
 # define __cpp_lib_chrono_udls                          201304L
 # define __cpp_lib_complex_udls                         201309L
 # define __cpp_lib_exchange_function                    201304L
@@ -233,7 +233,7 @@
 # define __cpp_lib_tuples_by_type                       201304L
 #endif
 
-#if _LIBCPP_STD_VER > 14
+#if _LIBCPP_STD_VER >= 17
 # define __cpp_lib_addressof_constexpr                  201603L
 # define __cpp_lib_allocator_traits_is_always_equal     201411L
 # define __cpp_lib_any                                  201606L
@@ -292,7 +292,7 @@
 # define __cpp_lib_void_t                               201411L
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 # undef  __cpp_lib_array_constexpr
 # define __cpp_lib_array_constexpr                      201811L
 # define __cpp_lib_assume_aligned                       201811L
@@ -329,7 +329,7 @@
 # define __cpp_lib_constexpr_utility                    201811L
 # define __cpp_lib_constexpr_vector                     201907L
 # define __cpp_lib_coroutine                            201902L
-# if _LIBCPP_STD_VER > 17 && defined(__cpp_impl_destroying_delete) && __cpp_impl_destroying_delete >= 201806L
+# if _LIBCPP_STD_VER >= 20 && defined(__cpp_impl_destroying_delete) && __cpp_impl_destroying_delete >= 201806L
 #   define __cpp_lib_destroying_delete                  201806L
 # endif
 # define __cpp_lib_endian                               201907L
@@ -381,7 +381,7 @@
 # define __cpp_lib_unwrap_ref                           201811L
 #endif
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
 # define __cpp_lib_adaptor_iterator_pair_constructor    202106L
 # define __cpp_lib_allocate_at_least                    202106L
 // # define __cpp_lib_associative_heterogeneous_erasure    202110L
diff --git a/libcxx/utils/generate_escaped_output_table.py b/libcxx/utils/generate_escaped_output_table.py
--- a/libcxx/utils/generate_escaped_output_table.py
+++ b/libcxx/utils/generate_escaped_output_table.py
@@ -228,13 +228,13 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 20
+#if _LIBCPP_STD_VER >= 23
 
 namespace __escaped_output_table {{
 {content}
 }} // namespace __escaped_output_table
 
-#endif //_LIBCPP_STD_VER > 20
+#endif //_LIBCPP_STD_VER >= 23
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/utils/generate_extended_grapheme_cluster_table.py b/libcxx/utils/generate_extended_grapheme_cluster_table.py
--- a/libcxx/utils/generate_extended_grapheme_cluster_table.py
+++ b/libcxx/utils/generate_extended_grapheme_cluster_table.py
@@ -222,13 +222,13 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 namespace __extended_grapheme_custer_property_boundary {{
 {content}
 }} // namespace __extended_grapheme_custer_property_boundary
 
-#endif //_LIBCPP_STD_VER > 17
+#endif //_LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/libcxx/utils/generate_feature_test_macro_components.py b/libcxx/utils/generate_feature_test_macro_components.py
--- a/libcxx/utils/generate_feature_test_macro_components.py
+++ b/libcxx/utils/generate_feature_test_macro_components.py
@@ -284,7 +284,7 @@
     "values": { "c++20": 201806 },
     "headers": ["new"],
     "test_suite_guard": "TEST_STD_VER > 17 && defined(__cpp_impl_destroying_delete) && __cpp_impl_destroying_delete >= 201806L",
-    "libcxx_guard": "_LIBCPP_STD_VER > 17 && defined(__cpp_impl_destroying_delete) && __cpp_impl_destroying_delete >= 201806L",
+    "libcxx_guard": "_LIBCPP_STD_VER >= 20 && defined(__cpp_impl_destroying_delete) && __cpp_impl_destroying_delete >= 201806L",
   }, {
     "name": "__cpp_lib_enable_shared_from_this",
     "values": { "c++17": 201603 },
@@ -873,17 +873,15 @@
   return result.strip()
 
 def produce_macros_definitions():
-  macro_definition_template = """#if _LIBCPP_STD_VER > {previous_std_number}
+  macro_definition_template = """#if _LIBCPP_STD_VER >= {std_number}
 {macro_definition}
 #endif"""
 
   macros_definitions = []
-  previous_std_number = '11'
   for std in get_std_dialects():
     macros_definitions.append(
-      macro_definition_template.format(previous_std_number=previous_std_number,
+      macro_definition_template.format(std_number=get_std_number(std).replace('2b', '23'),
                                        macro_definition=produce_macros_definition_for_std(std)))
-    previous_std_number = get_std_number(std)
 
   return '\n\n'.join(macros_definitions)