[libc++][NFC] Format __bit_reference

[Mordante]

LGTM, thanks for the cleanup. Maybe mark the patch as NFC.

[philnik]

Rebased

[philnik]

Try to fix CI

libcxx/include/__bit_reference

 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
 #endif
 
 _LIBCPP_PUSH_MACROS
 #include <__undef_macros>
 
-
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-template <class _Cp, bool _IsConst, typename _Cp::__storage_type = 0> class __bit_iterator;
-template <class _Cp> class __bit_const_reference;
+template <class _Cp, bool _IsConst, typename _Cp::__storage_type = 0>
+class __bit_iterator;
+template <class _Cp>
+class __bit_const_reference;
 
 template <class _Tp>
-struct __has_storage_type
-{
-    static const bool value = false;
+struct __has_storage_type {
 };
 
 template <class _Cp, bool = __has_storage_type<_Cp>::value>
-class __bit_reference
-{
-    using __storage_type    = typename _Cp::__storage_type;
-    using __storage_pointer = typename _Cp::__storage_pointer;
+class __bit_reference {
 
-    __storage_pointer __seg_;
-    __storage_type    __mask_;
+  __storage_type __mask_;
 
-    friend typename _Cp::__self;
 
-    friend class __bit_const_reference<_Cp>;
-    friend class __bit_iterator<_Cp, false>;
+
 public:
-    using __container = typename _Cp::__self;
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-    __bit_reference(const __bit_reference&) = default;
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_reference(const __bit_reference&) = default;
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 operator bool() const _NOEXCEPT
-        {return static_cast<bool>(*__seg_ & __mask_);}
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool operator ~() const _NOEXCEPT
-        {return !static_cast<bool>(*this);}
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 operator bool() const _NOEXCEPT {
+    return static_cast<bool>(*__seg_ & __mask_);
+  }
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool operator~() const _NOEXCEPT {
+    return !static_cast<bool>(*this);
+  }
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-    __bit_reference& operator=(bool __x) _NOEXCEPT
-    {
-        if (__x)
-            *__seg_ |= __mask_;
-        else
-            *__seg_ &= ~__mask_;
-        return *this;
-    }
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_reference& operator=(bool __x) _NOEXCEPT {
 
 #if _LIBCPP_STD_VER >= 23
-    _LIBCPP_HIDE_FROM_ABI constexpr const __bit_reference& operator=(bool __x) const noexcept {
-        if (__x)
-            *__seg_ |= __mask_;
-        else
-            *__seg_ &= ~__mask_;
-        return *this;
-    }
 #endif
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-    __bit_reference& operator=(const __bit_reference& __x) _NOEXCEPT
-        {return operator=(static_cast<bool>(__x));}
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_reference& operator=(const __bit_reference& __x) _NOEXCEPT {
+    return operator=(static_cast<bool>(__x));
+  }
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void flip() _NOEXCEPT {*__seg_ ^= __mask_;}
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator<_Cp, false> operator&() const _NOEXCEPT
-        {return __bit_iterator<_Cp, false>(__seg_, static_cast<unsigned>(std::__libcpp_ctz(__mask_)));}
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void flip() _NOEXCEPT { *__seg_ ^= __mask_; }
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator<_Cp, false> operator&() const _NOEXCEPT {
+    return __bit_iterator<_Cp, false>(__seg_, static_cast<unsigned>(std::__libcpp_ctz(__mask_)));
+  }
+
 private:
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-    explicit __bit_reference(__storage_pointer __s, __storage_type __m) _NOEXCEPT
-        : __seg_(__s), __mask_(__m) {}
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit __bit_reference(
+      __storage_pointer __s, __storage_type __m) _NOEXCEPT
+      : __seg_(__s),
+        __mask_(__m) {}
 };
 
 template <class _Cp>
-class __bit_reference<_Cp, false>
-{
-};
+class __bit_reference<_Cp, false> {};
 
 template <class _Cp>
-inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-void
-swap(__bit_reference<_Cp> __x, __bit_reference<_Cp> __y) _NOEXCEPT
-{
-    bool __t = __x;
-    __x = __y;
-    __y = __t;
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void
+swap(__bit_reference<_Cp> __x, __bit_reference<_Cp> __y) _NOEXCEPT {
+  __x      = __y;
+  __y      = __t;
 }
 
 template <class _Cp, class _Dp>
-inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-void
-swap(__bit_reference<_Cp> __x, __bit_reference<_Dp> __y) _NOEXCEPT
-{
-    bool __t = __x;
-    __x = __y;
-    __y = __t;
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void
+swap(__bit_reference<_Cp> __x, __bit_reference<_Dp> __y) _NOEXCEPT {
+  __x      = __y;
+  __y      = __t;
 }
 
 template <class _Cp>
-inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-void
-swap(__bit_reference<_Cp> __x, bool& __y) _NOEXCEPT
-{
-    bool __t = __x;
-    __x = __y;
-    __y = __t;
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void swap(__bit_reference<_Cp> __x, bool& __y) _NOEXCEPT {
+  __x      = __y;
+  __y      = __t;
 }
 
 template <class _Cp>
-inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-void
-swap(bool& __x, __bit_reference<_Cp> __y) _NOEXCEPT
-{
-    bool __t = __x;
-    __x = __y;
-    __y = __t;
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void swap(bool& __x, __bit_reference<_Cp> __y) _NOEXCEPT {
+  __x      = __y;
+  __y      = __t;
 }
 
 template <class _Cp>
-class __bit_const_reference
-{
-    using __storage_type    = typename _Cp::__storage_type;
-    using __storage_pointer = typename _Cp::__const_storage_pointer;
+class __bit_const_reference {
 
-    __storage_pointer        __seg_;
-    __storage_type __mask_;
+  __storage_pointer __seg_;
 
-    friend typename _Cp::__self;
-    friend class __bit_iterator<_Cp, true>;
+
 public:
-    using __container = typename _Cp::__self;
 
-    _LIBCPP_HIDE_FROM_ABI
-    __bit_const_reference(const __bit_const_reference&) = default;
+  _LIBCPP_HIDE_FROM_ABI __bit_const_reference(const __bit_const_reference&) = default;
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-    __bit_const_reference(const __bit_reference<_Cp>& __x) _NOEXCEPT
-        : __seg_(__x.__seg_), __mask_(__x.__mask_) {}
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_const_reference(const __bit_reference<_Cp>& __x) _NOEXCEPT
+      : __seg_(__x.__seg_),
+        __mask_(__x.__mask_) {}
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR operator bool() const _NOEXCEPT
-        {return static_cast<bool>(*__seg_ & __mask_);}
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR operator bool() const _NOEXCEPT {
+    return static_cast<bool>(*__seg_ & __mask_);
+  }
+
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator<_Cp, true> operator&() const _NOEXCEPT {
+    return __bit_iterator<_Cp, true>(__seg_, static_cast<unsigned>(std::__libcpp_ctz(__mask_)));
+  }
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator<_Cp, true> operator&() const _NOEXCEPT
-        {return __bit_iterator<_Cp, true>(__seg_, static_cast<unsigned>(std::__libcpp_ctz(__mask_)));}
 private:
-    _LIBCPP_HIDE_FROM_ABI
-    _LIBCPP_CONSTEXPR
-    explicit __bit_const_reference(__storage_pointer __s, __storage_type __m) _NOEXCEPT
-        : __seg_(__s), __mask_(__m) {}
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR explicit __bit_const_reference(
+      __storage_pointer __s, __storage_type __m) _NOEXCEPT
+      : __seg_(__s),
+        __mask_(__m) {}
 
-    __bit_const_reference& operator=(const __bit_const_reference&) = delete;
 };
 
 template <bool _Invert, class _Tp>
 _LIBCPP_CONSTEXPR_SINCE_CXX14 _Tp __invert_if(_Tp __v) {
   if (_Invert) {
     return ~__v;
   } else {
     return __v;
   }
 }
 
 // find
 
 template <bool _ToFind, class _Cp, bool _IsConst>
 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI __bit_iterator<_Cp, _IsConst>
-__find_bool(__bit_iterator<_Cp, _IsConst> __first, typename _Cp::size_type __n)
-{
-    using _It            = __bit_iterator<_Cp, _IsConst>;
-    using __storage_type = typename _It::__storage_type;
+__find_bool(__bit_iterator<_Cp, _IsConst> __first, typename _Cp::size_type __n) {
 
-    const int __bits_per_word = _It::__bits_per_word;
-    // do first partial word
-    if (__first.__ctz_ != 0)
-    {
-        __storage_type __clz_f = static_cast<__storage_type>(__bits_per_word - __first.__ctz_);
-        __storage_type __dn = std::min(__clz_f, __n);
-        __storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
-        __storage_type __b = std::__invert_if<!_ToFind>(*__first.__seg_) & __m;
-        if (__b)
-            return _It(__first.__seg_, static_cast<unsigned>(std::__libcpp_ctz(__b)));
-        if (__n == __dn)
-            return __first + __n;
-        __n -= __dn;
-        ++__first.__seg_;
-    }
-    // do middle whole words
-    for (; __n >= __bits_per_word; ++__first.__seg_, __n -= __bits_per_word) {
-        __storage_type __b = std::__invert_if<!_ToFind>(*__first.__seg_);
-        if (__b)
-            return _It(__first.__seg_, static_cast<unsigned>(std::__libcpp_ctz(__b)));
-    }
-    // do last partial word
-    if (__n > 0)
-    {
-        __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
-        __storage_type __b = std::__invert_if<!_ToFind>(*__first.__seg_) & __m;
-        if (__b)
-            return _It(__first.__seg_, static_cast<unsigned>(std::__libcpp_ctz(__b)));
-    }
-    return _It(__first.__seg_, static_cast<unsigned>(__n));
+  if (__first.__ctz_ != 0) {
+    __storage_type __dn    = std::min(__clz_f, __n);
+    __storage_type __m     = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
+    __storage_type __b     = std::__invert_if<!_ToFind>(*__first.__seg_) & __m;
+  if (__n > 0) {
 }
 
 template <class _Cp, bool _IsConst, class _Tp>
-inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-__bit_iterator<_Cp, _IsConst>
-find(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, const _Tp& __value)
-{
-    if (static_cast<bool>(__value))
-        return std::__find_bool<true>(__first, static_cast<typename _Cp::size_type>(__last - __first));
-    return std::__find_bool<false>(__first, static_cast<typename _Cp::size_type>(__last - __first));
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator<_Cp, _IsConst>
+find(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, const _Tp& __value) {
 }
 
 // count
 
 template <bool _ToCount, class _Cp, bool _IsConst>
 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 typename __bit_iterator<_Cp, _IsConst>::difference_type
-__count_bool(__bit_iterator<_Cp, _IsConst> __first, typename _Cp::size_type __n)
-{
-    using _It             = __bit_iterator<_Cp, _IsConst>;
-    using __storage_type  = typename _It::__storage_type;
-    using difference_type = typename _It::difference_type;
+__count_bool(__bit_iterator<_Cp, _IsConst> __first, typename _Cp::size_type __n) {
 
-    const int __bits_per_word = _It::__bits_per_word;
-    difference_type __r = 0;
-    // do first partial word
-    if (__first.__ctz_ != 0)
-    {
-        __storage_type __clz_f = static_cast<__storage_type>(__bits_per_word - __first.__ctz_);
-        __storage_type __dn = std::min(__clz_f, __n);
-        __storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
-        __r = std::__libcpp_popcount(std::__invert_if<!_ToCount>(*__first.__seg_) & __m);
-        __n -= __dn;
-        ++__first.__seg_;
-    }
-    // do middle whole words
-    for (; __n >= __bits_per_word; ++__first.__seg_, __n -= __bits_per_word)
-        __r += std::__libcpp_popcount(std::__invert_if<!_ToCount>(*__first.__seg_));
-    // do last partial word
-    if (__n > 0)
-    {
-        __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
-        __r += std::__libcpp_popcount(std::__invert_if<!_ToCount>(*__first.__seg_) & __m);
-    }
-    return __r;
+  difference_type __r       = 0;
+  if (__first.__ctz_ != 0) {
+    __storage_type __dn    = std::min(__clz_f, __n);
+    __storage_type __m     = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
+    __r                    = std::__libcpp_popcount(std::__invert_if<!_ToCount>(*__first.__seg_) & __m);
+  if (__n > 0) {
 }
 
 template <class _Cp, bool _IsConst, class _Tp>
-inline _LIBCPP_HIDE_FROM_ABI
-typename __bit_iterator<_Cp, _IsConst>::difference_type
-count(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, const _Tp& __value)
-{
-    if (static_cast<bool>(__value))
-        return std::__count_bool<true>(__first, static_cast<typename _Cp::size_type>(__last - __first));
-    return std::__count_bool<false>(__first, static_cast<typename _Cp::size_type>(__last - __first));
+inline _LIBCPP_HIDE_FROM_ABI typename __bit_iterator<_Cp, _IsConst>::difference_type
+count(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, const _Tp& __value) {
 }
 
 // fill_n
 
 template <bool _FillValue, class _Cp>
 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void
-__fill_n(__bit_iterator<_Cp, false> __first, typename _Cp::size_type __n)
-{
-    using _It            = __bit_iterator<_Cp, false>;
-    using __storage_type = typename _It::__storage_type;
+__fill_n(__bit_iterator<_Cp, false> __first, typename _Cp::size_type __n) {
 
-    const int __bits_per_word = _It::__bits_per_word;
-    // do first partial word
-    if (__first.__ctz_ != 0)
-    {
-        __storage_type __clz_f = static_cast<__storage_type>(__bits_per_word - __first.__ctz_);
-        __storage_type __dn = std::min(__clz_f, __n);
-        __storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
-        if (_FillValue)
-            *__first.__seg_ |= __m;
-        else
-            *__first.__seg_ &= ~__m;
-        __n -= __dn;
-        ++__first.__seg_;
-    }
-    // do middle whole words
-    __storage_type __nw = __n / __bits_per_word;
-    std::fill_n(std::__to_address(__first.__seg_), __nw, _FillValue ? static_cast<__storage_type>(-1) : 0);
-    __n -= __nw * __bits_per_word;
-    // do last partial word
-    if (__n > 0)
-    {
-        __first.__seg_ += __nw;
-        __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
-        if (_FillValue)
-            *__first.__seg_ |= __m;
-        else
-            *__first.__seg_ &= ~__m;
-    }
+  if (__first.__ctz_ != 0) {
+    __storage_type __dn    = std::min(__clz_f, __n);
+    __storage_type __m     = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
+  if (__n > 0) {
 }
 
 template <class _Cp>
-inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-void
-fill_n(__bit_iterator<_Cp, false> __first, typename _Cp::size_type __n, bool __value)
-{
-    if (__n > 0)
-    {
-        if (__value)
-            std::__fill_n<true>(__first, __n);
-        else
-            std::__fill_n<false>(__first, __n);
-    }
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void
+fill_n(__bit_iterator<_Cp, false> __first, typename _Cp::size_type __n, bool __value) {
+  if (__n > 0) {
 }
 
 // fill
 
 template <class _Cp>
-inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-void
-fill(__bit_iterator<_Cp, false> __first, __bit_iterator<_Cp, false> __last, bool __value)
-{
-    std::fill_n(__first, static_cast<typename _Cp::size_type>(__last - __first), __value);
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void
+fill(__bit_iterator<_Cp, false> __first, __bit_iterator<_Cp, false> __last, bool __value) {
 }
 
 // copy
 
 template <class _Cp, bool _IsConst>
-_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI __bit_iterator<_Cp, false>
-__copy_aligned(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last,
-                                                     __bit_iterator<_Cp, false> __result)
-{
-    using _In             = __bit_iterator<_Cp, _IsConst>;
-    using difference_type = typename _In::difference_type;
-    using __storage_type  = typename _In::__storage_type;
+_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI __bit_iterator<_Cp, false> __copy_aligned(
+    __bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, __bit_iterator<_Cp, false> __result) {
 
-    const int __bits_per_word = _In::__bits_per_word;
-    difference_type __n = __last - __first;
-    if (__n > 0)
-    {
-        // do first word
-        if (__first.__ctz_ != 0)
-        {
-            unsigned __clz = __bits_per_word - __first.__ctz_;
-            difference_type __dn = std::min(static_cast<difference_type>(__clz), __n);
-            __n -= __dn;
-            __storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz - __dn));
-            __storage_type __b = *__first.__seg_ & __m;
-            *__result.__seg_ &= ~__m;
-            *__result.__seg_ |= __b;
-            __result.__seg_ += (__dn + __result.__ctz_) / __bits_per_word;
-            __result.__ctz_ = static_cast<unsigned>((__dn + __result.__ctz_)  % __bits_per_word);
-            ++__first.__seg_;
-            // __first.__ctz_ = 0;
-        }
-        // __first.__ctz_ == 0;
-        // do middle words
-        __storage_type __nw = __n / __bits_per_word;
-        std::copy_n(std::__to_address(__first.__seg_), __nw, std::__to_address(__result.__seg_));
-        __n -= __nw * __bits_per_word;
-        __result.__seg_ += __nw;
-        // do last word
-        if (__n > 0)
-        {
-            __first.__seg_ += __nw;
-            __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
-            __storage_type __b = *__first.__seg_ & __m;
-            *__result.__seg_ &= ~__m;
-            *__result.__seg_ |= __b;
-            __result.__ctz_ = static_cast<unsigned>(__n);
-        }
-    }
-    return __result;
+  difference_type __n       = __last - __first;
+  if (__n > 0) {
+    if (__first.__ctz_ != 0) {
+      unsigned __clz       = __bits_per_word - __first.__ctz_;
+      __result.__ctz_ = static_cast<unsigned>((__dn + __result.__ctz_) % __bits_per_word);
+    if (__n > 0) {
 }
 
 template <class _Cp, bool _IsConst>
-_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI __bit_iterator<_Cp, false>
-__copy_unaligned(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last,
-                                                       __bit_iterator<_Cp, false> __result)
-{
-    using _In             = __bit_iterator<_Cp, _IsConst>;
-    using difference_type = typename _In::difference_type;
-    using __storage_type  = typename _In::__storage_type;
+_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI __bit_iterator<_Cp, false> __copy_unaligned(
+    __bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, __bit_iterator<_Cp, false> __result) {
 
-    const int __bits_per_word = _In::__bits_per_word;
-    difference_type __n = __last - __first;
-    if (__n > 0)
-    {
-        // do first word
-        if (__first.__ctz_ != 0)
-        {
-            unsigned __clz_f = __bits_per_word - __first.__ctz_;
-            difference_type __dn = std::min(static_cast<difference_type>(__clz_f), __n);
-            __n -= __dn;
-            __storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
-            __storage_type __b = *__first.__seg_ & __m;
-            unsigned __clz_r = __bits_per_word - __result.__ctz_;
-            __storage_type __ddn = std::min<__storage_type>(__dn, __clz_r);
-            __m = (~__storage_type(0) << __result.__ctz_) & (~__storage_type(0) >> (__clz_r - __ddn));
-            *__result.__seg_ &= ~__m;
-            if (__result.__ctz_ > __first.__ctz_)
-                *__result.__seg_ |= __b << (__result.__ctz_ - __first.__ctz_);
-            else
-                *__result.__seg_ |= __b >> (__first.__ctz_ - __result.__ctz_);
-            __result.__seg_ += (__ddn + __result.__ctz_) / __bits_per_word;
-            __result.__ctz_ = static_cast<unsigned>((__ddn + __result.__ctz_)  % __bits_per_word);
-            __dn -= __ddn;
-            if (__dn > 0)
-            {
-                __m = ~__storage_type(0) >> (__bits_per_word - __dn);
-                *__result.__seg_ &= ~__m;
-                *__result.__seg_ |= __b >> (__first.__ctz_ + __ddn);
-                __result.__ctz_ = static_cast<unsigned>(__dn);
-            }
-            ++__first.__seg_;
-            // __first.__ctz_ = 0;
-        }
-        // __first.__ctz_ == 0;
-        // do middle words
-        unsigned __clz_r = __bits_per_word - __result.__ctz_;
-        __storage_type __m = ~__storage_type(0) << __result.__ctz_;
-        for (; __n >= __bits_per_word; __n -= __bits_per_word, ++__first.__seg_)
-        {
-            __storage_type __b = *__first.__seg_;
-            *__result.__seg_ &= ~__m;
-            *__result.__seg_ |= __b << __result.__ctz_;
-            ++__result.__seg_;
-            *__result.__seg_ &= __m;
-            *__result.__seg_ |= __b >> __clz_r;
-        }
-        // do last word
-        if (__n > 0)
-        {
-            __m = ~__storage_type(0) >> (__bits_per_word - __n);
-            __storage_type __b = *__first.__seg_ & __m;
-            __storage_type __dn = std::min(__n, static_cast<difference_type>(__clz_r));
-            __m = (~__storage_type(0) << __result.__ctz_) & (~__storage_type(0) >> (__clz_r - __dn));
-            *__result.__seg_ &= ~__m;
-            *__result.__seg_ |= __b << __result.__ctz_;
-            __result.__seg_ += (__dn + __result.__ctz_) / __bits_per_word;
-            __result.__ctz_ = static_cast<unsigned>((__dn + __result.__ctz_)  % __bits_per_word);
-            __n -= __dn;
-            if (__n > 0)
-            {
-                __m = ~__storage_type(0) >> (__bits_per_word - __n);
-                *__result.__seg_ &= ~__m;
-                *__result.__seg_ |= __b >> __dn;
-                __result.__ctz_ = static_cast<unsigned>(__n);
-            }
-        }
-    }
-    return __result;
+  difference_type __n       = __last - __first;
+  if (__n > 0) {
+    if (__first.__ctz_ != 0) {
+      unsigned __clz_f     = __bits_per_word - __first.__ctz_;
+      __storage_type __m   = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
+      __storage_type __b   = *__first.__seg_ & __m;
+      unsigned __clz_r     = __bits_per_word - __result.__ctz_;
+      __m                  = (~__storage_type(0) << __result.__ctz_) & (~__storage_type(0) >> (__clz_r - __ddn));
+      __result.__ctz_ = static_cast<unsigned>((__ddn + __result.__ctz_) % __bits_per_word);
+      if (__dn > 0) {
+    unsigned __clz_r   = __bits_per_word - __result.__ctz_;
+    for (; __n >= __bits_per_word; __n -= __bits_per_word, ++__first.__seg_) {
+    if (__n > 0) {
+      __m                 = ~__storage_type(0) >> (__bits_per_word - __n);
+      __storage_type __b  = *__first.__seg_ & __m;
+      __m                 = (~__storage_type(0) << __result.__ctz_) & (~__storage_type(0) >> (__clz_r - __dn));
+      __result.__ctz_ = static_cast<unsigned>((__dn + __result.__ctz_) % __bits_per_word);
+      if (__n > 0) {
 }
 
 template <class _Cp, bool _IsConst>
-inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-__bit_iterator<_Cp, false>
-copy(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, __bit_iterator<_Cp, false> __result)
-{
-    if (__first.__ctz_ == __result.__ctz_)
-        return std::__copy_aligned(__first, __last, __result);
-    return std::__copy_unaligned(__first, __last, __result);
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator<_Cp, false>
+copy(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, __bit_iterator<_Cp, false> __result) {
 }
 
 // copy_backward
 
 template <class _Cp, bool _IsConst>
-_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI __bit_iterator<_Cp, false>
-__copy_backward_aligned(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last,
-                                                     __bit_iterator<_Cp, false> __result)
-{
-    using _In             = __bit_iterator<_Cp, _IsConst>;
-    using difference_type = typename _In::difference_type;
-    using __storage_type  = typename _In::__storage_type;
+_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI __bit_iterator<_Cp, false> __copy_backward_aligned(
+    __bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, __bit_iterator<_Cp, false> __result) {
 
-    const int __bits_per_word = _In::__bits_per_word;
-    difference_type __n = __last - __first;
-    if (__n > 0)
-    {
-        // do first word
-        if (__last.__ctz_ != 0)
-        {
-            difference_type __dn = std::min(static_cast<difference_type>(__last.__ctz_), __n);
-            __n -= __dn;
-            unsigned __clz = __bits_per_word - __last.__ctz_;
-            __storage_type __m = (~__storage_type(0) << (__last.__ctz_ - __dn)) & (~__storage_type(0) >> __clz);
-            __storage_type __b = *__last.__seg_ & __m;
-            *__result.__seg_ &= ~__m;
-            *__result.__seg_ |= __b;
-            __result.__ctz_ = static_cast<unsigned>(((-__dn & (__bits_per_word - 1)) +
-                                                       __result.__ctz_)  % __bits_per_word);
-            // __last.__ctz_ = 0
-         }
-        // __last.__ctz_ == 0 || __n == 0
-        // __result.__ctz_ == 0 || __n == 0
-        // do middle words
-        __storage_type __nw = __n / __bits_per_word;
-        __result.__seg_ -= __nw;
-        __last.__seg_ -= __nw;
-        std::copy_n(std::__to_address(__last.__seg_), __nw, std::__to_address(__result.__seg_));
-        __n -= __nw * __bits_per_word;
-        // do last word
-        if (__n > 0)
-        {
-            __storage_type __m = ~__storage_type(0) << (__bits_per_word - __n);
-            __storage_type __b = *--__last.__seg_ & __m;
-            *--__result.__seg_ &= ~__m;
-            *__result.__seg_ |= __b;
-            __result.__ctz_ = static_cast<unsigned>(-__n & (__bits_per_word - 1));
-        }
-    }
-    return __result;
+  difference_type __n       = __last - __first;
+  if (__n > 0) {
+    if (__last.__ctz_ != 0) {
+      unsigned __clz     = __bits_per_word - __last.__ctz_;
+      __result.__ctz_ = static_cast<unsigned>(((-__dn & (__bits_per_word - 1)) + __result.__ctz_) % __bits_per_word);
+    if (__n > 0) {
 }
 
 template <class _Cp, bool _IsConst>
-_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI __bit_iterator<_Cp, false>
-__copy_backward_unaligned(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last,
-                                                       __bit_iterator<_Cp, false> __result)
-{
-    using _In             = __bit_iterator<_Cp, _IsConst>;
-    using difference_type = typename _In::difference_type;
-    using __storage_type  = typename _In::__storage_type;
+_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI __bit_iterator<_Cp, false> __copy_backward_unaligned(
+    __bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, __bit_iterator<_Cp, false> __result) {
 
-    const int __bits_per_word = _In::__bits_per_word;
-    difference_type __n = __last - __first;
-    if (__n > 0)
-    {
-        // do first word
-        if (__last.__ctz_ != 0)
-        {
-            difference_type __dn = std::min(static_cast<difference_type>(__last.__ctz_), __n);
-            __n -= __dn;
-            unsigned __clz_l = __bits_per_word - __last.__ctz_;
-            __storage_type __m = (~__storage_type(0) << (__last.__ctz_ - __dn)) & (~__storage_type(0) >> __clz_l);
-            __storage_type __b = *__last.__seg_ & __m;
-            unsigned __clz_r = __bits_per_word - __result.__ctz_;
-            __storage_type __ddn = std::min(__dn, static_cast<difference_type>(__result.__ctz_));
-            if (__ddn > 0)
-            {
-                __m = (~__storage_type(0) << (__result.__ctz_ - __ddn)) & (~__storage_type(0) >> __clz_r);
-                *__result.__seg_ &= ~__m;
-                if (__result.__ctz_ > __last.__ctz_)
-                    *__result.__seg_ |= __b << (__result.__ctz_ - __last.__ctz_);
-                else
-                    *__result.__seg_ |= __b >> (__last.__ctz_ - __result.__ctz_);
-                __result.__ctz_ = static_cast<unsigned>(((-__ddn & (__bits_per_word - 1)) +
-                                                         __result.__ctz_)  % __bits_per_word);
-                __dn -= __ddn;
-            }
-            if (__dn > 0)
-            {
-                // __result.__ctz_ == 0
-                --__result.__seg_;
-                __result.__ctz_ = static_cast<unsigned>(-__dn & (__bits_per_word - 1));
-                __m = ~__storage_type(0) << __result.__ctz_;
-                *__result.__seg_ &= ~__m;
-                __last.__ctz_ -= __dn + __ddn;
-                *__result.__seg_ |= __b << (__result.__ctz_ - __last.__ctz_);
-            }
-            // __last.__ctz_ = 0
-         }
-        // __last.__ctz_ == 0 || __n == 0
-        // __result.__ctz_ != 0 || __n == 0
-        // do middle words
-        unsigned __clz_r = __bits_per_word - __result.__ctz_;
-        __storage_type __m = ~__storage_type(0) >> __clz_r;
-        for (; __n >= __bits_per_word; __n -= __bits_per_word)
-        {
-            __storage_type __b = *--__last.__seg_;
-            *__result.__seg_ &= ~__m;
-            *__result.__seg_ |= __b >> __clz_r;
-            *--__result.__seg_ &= __m;
-            *__result.__seg_ |= __b << __result.__ctz_;
-        }
-        // do last word
-        if (__n > 0)
-        {
-            __m = ~__storage_type(0) << (__bits_per_word - __n);
-            __storage_type __b = *--__last.__seg_ & __m;
-            __clz_r = __bits_per_word - __result.__ctz_;
-            __storage_type __dn = std::min(__n, static_cast<difference_type>(__result.__ctz_));
-            __m = (~__storage_type(0) << (__result.__ctz_ - __dn)) & (~__storage_type(0) >> __clz_r);
-            *__result.__seg_ &= ~__m;
-            *__result.__seg_ |= __b >> (__bits_per_word - __result.__ctz_);
-            __result.__ctz_ = static_cast<unsigned>(((-__dn & (__bits_per_word - 1)) +
-                                                     __result.__ctz_)  % __bits_per_word);
-            __n -= __dn;
-            if (__n > 0)
-            {
-                // __result.__ctz_ == 0
-                --__result.__seg_;
-                __result.__ctz_ = static_cast<unsigned>(-__n & (__bits_per_word - 1));
-                __m = ~__storage_type(0) << __result.__ctz_;
-                *__result.__seg_ &= ~__m;
-                *__result.__seg_ |= __b << (__result.__ctz_ - (__bits_per_word - __n - __dn));
-            }
-        }
-    }
-    return __result;
+  difference_type __n       = __last - __first;
+  if (__n > 0) {
+    if (__last.__ctz_ != 0) {
+      unsigned __clz_l     = __bits_per_word - __last.__ctz_;
+      __storage_type __m   = (~__storage_type(0) << (__last.__ctz_ - __dn)) & (~__storage_type(0) >> __clz_l);
+      __storage_type __b   = *__last.__seg_ & __m;
+      unsigned __clz_r     = __bits_per_word - __result.__ctz_;
+      if (__ddn > 0) {
+        __result.__ctz_ = static_cast<unsigned>(((-__ddn & (__bits_per_word - 1)) + __result.__ctz_) % __bits_per_word);
+      if (__dn > 0) {
+        __m             = ~__storage_type(0) << __result.__ctz_;
+    unsigned __clz_r   = __bits_per_word - __result.__ctz_;
+    for (; __n >= __bits_per_word; __n -= __bits_per_word) {
+    if (__n > 0) {
+      __m                 = ~__storage_type(0) << (__bits_per_word - __n);
+      __storage_type __b  = *--__last.__seg_ & __m;
+      __clz_r             = __bits_per_word - __result.__ctz_;
+      __m                 = (~__storage_type(0) << (__result.__ctz_ - __dn)) & (~__storage_type(0) >> __clz_r);
+      __result.__ctz_ = static_cast<unsigned>(((-__dn & (__bits_per_word - 1)) + __result.__ctz_) % __bits_per_word);
+      if (__n > 0) {
+        __m             = ~__storage_type(0) << __result.__ctz_;
 }
 
 template <class _Cp, bool _IsConst>
-inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-__bit_iterator<_Cp, false>
-copy_backward(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, __bit_iterator<_Cp, false> __result)
-{
-    if (__last.__ctz_ == __result.__ctz_)
-        return std::__copy_backward_aligned(__first, __last, __result);
-    return std::__copy_backward_unaligned(__first, __last, __result);
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator<_Cp, false> copy_backward(
+    __bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, __bit_iterator<_Cp, false> __result) {
 }
 
 // move
 
 template <class _Cp, bool _IsConst>
-inline _LIBCPP_HIDE_FROM_ABI
-__bit_iterator<_Cp, false>
-move(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, __bit_iterator<_Cp, false> __result)
-{
-    return std::copy(__first, __last, __result);
+inline _LIBCPP_HIDE_FROM_ABI __bit_iterator<_Cp, false>
+move(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, __bit_iterator<_Cp, false> __result) {
 }
 
 // move_backward
 
 template <class _Cp, bool _IsConst>
-inline _LIBCPP_HIDE_FROM_ABI
-__bit_iterator<_Cp, false>
-move_backward(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, __bit_iterator<_Cp, false> __result)
-{
-    return std::copy_backward(__first, __last, __result);
+inline _LIBCPP_HIDE_FROM_ABI __bit_iterator<_Cp, false> move_backward(
+    __bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, __bit_iterator<_Cp, false> __result) {
 }
 
 // swap_ranges
 
 template <class __C1, class __C2>
-_LIBCPP_HIDE_FROM_ABI __bit_iterator<__C2, false>
-__swap_ranges_aligned(__bit_iterator<__C1, false> __first, __bit_iterator<__C1, false> __last,
-                      __bit_iterator<__C2, false> __result)
-{
-    using _I1             = __bit_iterator<__C1, false>;
-    using difference_type = typename _I1::difference_type;
-    using __storage_type  = typename _I1::__storage_type;
+_LIBCPP_HIDE_FROM_ABI __bit_iterator<__C2, false> __swap_ranges_aligned(
+    __bit_iterator<__C1, false> __first, __bit_iterator<__C1, false> __last, __bit_iterator<__C2, false> __result) {
 
-    const int __bits_per_word = _I1::__bits_per_word;
-    difference_type __n = __last - __first;
-    if (__n > 0)
-    {
-        // do first word
-        if (__first.__ctz_ != 0)
-        {
-            unsigned __clz = __bits_per_word - __first.__ctz_;
-            difference_type __dn = std::min(static_cast<difference_type>(__clz), __n);
-            __n -= __dn;
-            __storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz - __dn));
-            __storage_type __b1 = *__first.__seg_ & __m;
-            *__first.__seg_ &= ~__m;
-            __storage_type __b2 = *__result.__seg_ & __m;
-            *__result.__seg_ &= ~__m;
-            *__result.__seg_ |= __b1;
-            *__first.__seg_  |= __b2;
-            __result.__seg_ += (__dn + __result.__ctz_) / __bits_per_word;
-            __result.__ctz_ = static_cast<unsigned>((__dn + __result.__ctz_)  % __bits_per_word);
-            ++__first.__seg_;
-            // __first.__ctz_ = 0;
-        }
-        // __first.__ctz_ == 0;
-        // do middle words
-        for (; __n >= __bits_per_word; __n -= __bits_per_word, ++__first.__seg_, ++__result.__seg_)
-            swap(*__first.__seg_, *__result.__seg_);
-        // do last word
-        if (__n > 0)
-        {
-            __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
-            __storage_type __b1 = *__first.__seg_ & __m;
-            *__first.__seg_ &= ~__m;
-            __storage_type __b2 = *__result.__seg_ & __m;
-            *__result.__seg_ &= ~__m;
-            *__result.__seg_ |= __b1;
-            *__first.__seg_  |= __b2;
-            __result.__ctz_ = static_cast<unsigned>(__n);
-        }
-    }
-    return __result;
+  difference_type __n       = __last - __first;
+  if (__n > 0) {
+    if (__first.__ctz_ != 0) {
+      unsigned __clz       = __bits_per_word - __first.__ctz_;
+      __storage_type __m  = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz - __dn));
+      *__first.__seg_ |= __b2;
+      __result.__ctz_ = static_cast<unsigned>((__dn + __result.__ctz_) % __bits_per_word);
+    if (__n > 0) {
+      __storage_type __m  = ~__storage_type(0) >> (__bits_per_word - __n);
+      *__first.__seg_ |= __b2;
 }
 
 template <class __C1, class __C2>
-_LIBCPP_HIDE_FROM_ABI __bit_iterator<__C2, false>
-__swap_ranges_unaligned(__bit_iterator<__C1, false> __first, __bit_iterator<__C1, false> __last,
-                        __bit_iterator<__C2, false> __result)
-{
-    using _I1             = __bit_iterator<__C1, false>;
-    using difference_type = typename _I1::difference_type;
-    using __storage_type  = typename _I1::__storage_type;
+_LIBCPP_HIDE_FROM_ABI __bit_iterator<__C2, false> __swap_ranges_unaligned(
+    __bit_iterator<__C1, false> __first, __bit_iterator<__C1, false> __last, __bit_iterator<__C2, false> __result) {
 
-    const int __bits_per_word = _I1::__bits_per_word;
-    difference_type __n = __last - __first;
-    if (__n > 0)
-    {
-        // do first word
-        if (__first.__ctz_ != 0)
-        {
-            unsigned __clz_f = __bits_per_word - __first.__ctz_;
-            difference_type __dn = std::min(static_cast<difference_type>(__clz_f), __n);
-            __n -= __dn;
-            __storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
-            __storage_type __b1 = *__first.__seg_ & __m;
-            *__first.__seg_ &= ~__m;
-            unsigned __clz_r = __bits_per_word - __result.__ctz_;
-            __storage_type __ddn = std::min<__storage_type>(__dn, __clz_r);
-            __m = (~__storage_type(0) << __result.__ctz_) & (~__storage_type(0) >> (__clz_r - __ddn));
-            __storage_type __b2 = *__result.__seg_ & __m;
-            *__result.__seg_ &= ~__m;
-            if (__result.__ctz_ > __first.__ctz_)
-            {
-                unsigned __s = __result.__ctz_ - __first.__ctz_;
-                *__result.__seg_ |= __b1 << __s;
-                *__first.__seg_  |= __b2 >> __s;
-            }
-            else
-            {
-                unsigned __s = __first.__ctz_ - __result.__ctz_;
-                *__result.__seg_ |= __b1 >> __s;
-                *__first.__seg_  |= __b2 << __s;
-            }
-            __result.__seg_ += (__ddn + __result.__ctz_) / __bits_per_word;
-            __result.__ctz_ = static_cast<unsigned>((__ddn + __result.__ctz_)  % __bits_per_word);
-            __dn -= __ddn;
-            if (__dn > 0)
-            {
-                __m = ~__storage_type(0) >> (__bits_per_word - __dn);
-                __b2 = *__result.__seg_ & __m;
-                *__result.__seg_ &= ~__m;
-                unsigned __s = __first.__ctz_ + __ddn;
-                *__result.__seg_ |= __b1 >> __s;
-                *__first.__seg_  |= __b2 << __s;
-                __result.__ctz_ = static_cast<unsigned>(__dn);
-            }
-            ++__first.__seg_;
-            // __first.__ctz_ = 0;
-        }
-        // __first.__ctz_ == 0;
-        // do middle words
-        __storage_type __m = ~__storage_type(0) << __result.__ctz_;
-        unsigned __clz_r = __bits_per_word - __result.__ctz_;
-        for (; __n >= __bits_per_word; __n -= __bits_per_word, ++__first.__seg_)
-        {
-            __storage_type __b1 = *__first.__seg_;
-            __storage_type __b2 = *__result.__seg_ & __m;
-            *__result.__seg_ &= ~__m;
-            *__result.__seg_ |= __b1 << __result.__ctz_;
-            *__first.__seg_  = __b2 >> __result.__ctz_;
-            ++__result.__seg_;
-            __b2 = *__result.__seg_ & ~__m;
-            *__result.__seg_ &= __m;
-            *__result.__seg_ |= __b1 >> __clz_r;
-            *__first.__seg_  |= __b2 << __clz_r;
-        }
-        // do last word
-        if (__n > 0)
-        {
-            __m = ~__storage_type(0) >> (__bits_per_word - __n);
-            __storage_type __b1 = *__first.__seg_ & __m;
-            *__first.__seg_ &= ~__m;
-            __storage_type __dn = std::min<__storage_type>(__n, __clz_r);
-            __m = (~__storage_type(0) << __result.__ctz_) & (~__storage_type(0) >> (__clz_r - __dn));
-            __storage_type __b2 = *__result.__seg_ & __m;
-            *__result.__seg_ &= ~__m;
-            *__result.__seg_ |= __b1 << __result.__ctz_;
-            *__first.__seg_  |= __b2 >> __result.__ctz_;
-            __result.__seg_ += (__dn + __result.__ctz_) / __bits_per_word;
-            __result.__ctz_ = static_cast<unsigned>((__dn + __result.__ctz_)  % __bits_per_word);
-            __n -= __dn;
-            if (__n > 0)
-            {
-                __m = ~__storage_type(0) >> (__bits_per_word - __n);
-                __b2 = *__result.__seg_ & __m;
-                *__result.__seg_ &= ~__m;
-                *__result.__seg_ |= __b1 >> __dn;
-                *__first.__seg_  |= __b2 << __dn;
-                __result.__ctz_ = static_cast<unsigned>(__n);
-            }
-        }
-    }
-    return __result;
+  difference_type __n       = __last - __first;
+  if (__n > 0) {
+    if (__first.__ctz_ != 0) {
+      unsigned __clz_f     = __bits_per_word - __first.__ctz_;
+      __storage_type __m  = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
+      unsigned __clz_r     = __bits_per_word - __result.__ctz_;
+      __m                  = (~__storage_type(0) << __result.__ctz_) & (~__storage_type(0) >> (__clz_r - __ddn));
+      __storage_type __b2  = *__result.__seg_ & __m;
+      if (__result.__ctz_ > __first.__ctz_) {
+        *__first.__seg_ |= __b2 >> __s;
+      } else {
+        *__first.__seg_ |= __b2 << __s;
+      __result.__ctz_ = static_cast<unsigned>((__ddn + __result.__ctz_) % __bits_per_word);
+      if (__dn > 0) {
+        __m  = ~__storage_type(0) >> (__bits_per_word - __dn);
+        *__first.__seg_ |= __b2 << __s;
+    unsigned __clz_r   = __bits_per_word - __result.__ctz_;
+    for (; __n >= __bits_per_word; __n -= __bits_per_word, ++__first.__seg_) {
+      *__first.__seg_ = __b2 >> __result.__ctz_;
+      *__first.__seg_ |= __b2 << __clz_r;
+    if (__n > 0) {
+      __m                 = ~__storage_type(0) >> (__bits_per_word - __n);
+      __m                 = (~__storage_type(0) << __result.__ctz_) & (~__storage_type(0) >> (__clz_r - __dn));
+      *__first.__seg_ |= __b2 >> __result.__ctz_;
+      __result.__ctz_ = static_cast<unsigned>((__dn + __result.__ctz_) % __bits_per_word);
+      if (__n > 0) {
+        __m  = ~__storage_type(0) >> (__bits_per_word - __n);
+        *__first.__seg_ |= __b2 << __dn;
 }
 
 template <class __C1, class __C2>
-inline _LIBCPP_HIDE_FROM_ABI
-__bit_iterator<__C2, false>
-swap_ranges(__bit_iterator<__C1, false> __first1, __bit_iterator<__C1, false> __last1,
-            __bit_iterator<__C2, false> __first2)
-{
-    if (__first1.__ctz_ == __first2.__ctz_)
-        return std::__swap_ranges_aligned(__first1, __last1, __first2);
-    return std::__swap_ranges_unaligned(__first1, __last1, __first2);
+inline _LIBCPP_HIDE_FROM_ABI __bit_iterator<__C2, false> swap_ranges(
+    __bit_iterator<__C1, false> __first1, __bit_iterator<__C1, false> __last1, __bit_iterator<__C2, false> __first2) {
 }
 
 // rotate
 
 template <class _Cp>
-struct __bit_array
-{
-    using difference_type   = typename _Cp::difference_type;
-    using __storage_type    = typename _Cp::__storage_type;
-    using __storage_pointer = typename _Cp::__storage_pointer;
-    using iterator          = typename _Cp::iterator;
+struct __bit_array {
 
-    static const unsigned __bits_per_word = _Cp::__bits_per_word;
-    static const unsigned _Np = 4;
+  static const unsigned _Np             = 4;
 
-    difference_type __size_;
-    __storage_type __word_[_Np];
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 static difference_type capacity()
-        {return static_cast<difference_type>(_Np * __bits_per_word);}
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit __bit_array(difference_type __s) : __size_(__s) {
-        if (__libcpp_is_constant_evaluated()) {
-            for (size_t __i = 0; __i != __bit_array<_Cp>::_Np; ++__i)
-                std::__construct_at(__word_ + __i, 0);
-        }
-    }
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator begin()
-    {
-        return iterator(pointer_traits<__storage_pointer>::pointer_to(__word_[0]), 0);
-    }
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator end()
-    {
-        return iterator(pointer_traits<__storage_pointer>::pointer_to(__word_[0]) + __size_ / __bits_per_word,
-                                                  static_cast<unsigned>(__size_ % __bits_per_word));
-    }
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 static difference_type capacity() {
+    return static_cast<difference_type>(_Np * __bits_per_word);
+  }
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator begin() {
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator end() {
 };
 
 template <class _Cp>
 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI __bit_iterator<_Cp, false>
-rotate(__bit_iterator<_Cp, false> __first, __bit_iterator<_Cp, false> __middle, __bit_iterator<_Cp, false> __last)
-{
-    using _I1             = __bit_iterator<_Cp, false>;
-    using difference_type = typename _I1::difference_type;
+rotate(__bit_iterator<_Cp, false> __first, __bit_iterator<_Cp, false> __middle, __bit_iterator<_Cp, false> __last) {
 
-    difference_type __d1 = __middle - __first;
-    difference_type __d2 = __last - __middle;
-    _I1 __r = __first + __d2;
-    while (__d1 != 0 && __d2 != 0)
-    {
-        if (__d1 <= __d2)
-        {
-            if (__d1 <= __bit_array<_Cp>::capacity())
-            {
-                __bit_array<_Cp> __b(__d1);
-                std::copy(__first, __middle, __b.begin());
-                std::copy(__b.begin(), __b.end(), std::copy(__middle, __last, __first));
-                break;
-            }
-            else
-            {
-                __bit_iterator<_Cp, false> __mp = std::swap_ranges(__first, __middle, __middle);
-                __first = __middle;
-                __middle = __mp;
-                __d2 -= __d1;
-            }
-        }
-        else
-        {
-            if (__d2 <= __bit_array<_Cp>::capacity())
-            {
-                __bit_array<_Cp> __b(__d2);
-                std::copy(__middle, __last, __b.begin());
-                std::copy_backward(__b.begin(), __b.end(), std::copy_backward(__first, __middle, __last));
-                break;
-            }
-            else
-            {
-                __bit_iterator<_Cp, false> __mp = __first + __d2;
-                std::swap_ranges(__first, __mp, __middle);
-                __first = __mp;
-                __d1 -= __d2;
-            }
-        }
-    }
-    return __r;
+  _I1 __r              = __first + __d2;
+  while (__d1 != 0 && __d2 != 0) {
+    if (__d1 <= __d2) {
+      if (__d1 <= __bit_array<_Cp>::capacity()) {
+      } else {
+        __first                         = __middle;
+        __middle                        = __mp;
+    } else {
+      if (__d2 <= __bit_array<_Cp>::capacity()) {
+      } else {
 }
 
 // equal
 
 template <class _Cp, bool _IC1, bool _IC2>
-_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI bool
-__equal_unaligned(__bit_iterator<_Cp, _IC1> __first1, __bit_iterator<_Cp, _IC1> __last1,
-                  __bit_iterator<_Cp, _IC2> __first2)
-{
-    using _It             = __bit_iterator<_Cp, _IC1>;
-    using difference_type = typename _It::difference_type;
-    using __storage_type  = typename _It::__storage_type;
+_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI bool __equal_unaligned(
+    __bit_iterator<_Cp, _IC1> __first1, __bit_iterator<_Cp, _IC1> __last1, __bit_iterator<_Cp, _IC2> __first2) {
 
-    const int __bits_per_word = _It::__bits_per_word;
-    difference_type __n = __last1 - __first1;
-    if (__n > 0)
-    {
-        // do first word
-        if (__first1.__ctz_ != 0)
-        {
-            unsigned __clz_f = __bits_per_word - __first1.__ctz_;
-            difference_type __dn = std::min(static_cast<difference_type>(__clz_f), __n);
-            __n -= __dn;
-            __storage_type __m = (~__storage_type(0) << __first1.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
-            __storage_type __b = *__first1.__seg_ & __m;
-            unsigned __clz_r = __bits_per_word - __first2.__ctz_;
-            __storage_type __ddn = std::min<__storage_type>(__dn, __clz_r);
-            __m = (~__storage_type(0) << __first2.__ctz_) & (~__storage_type(0) >> (__clz_r - __ddn));
-            if (__first2.__ctz_ > __first1.__ctz_)
-            {
-                if ((*__first2.__seg_ & __m) != (__b << (__first2.__ctz_ - __first1.__ctz_)))
-                    return false;
-            }
-            else
-            {
-                if ((*__first2.__seg_ & __m) != (__b >> (__first1.__ctz_ - __first2.__ctz_)))
-                    return false;
-            }
-            __first2.__seg_ += (__ddn + __first2.__ctz_) / __bits_per_word;
-            __first2.__ctz_ = static_cast<unsigned>((__ddn + __first2.__ctz_)  % __bits_per_word);
-            __dn -= __ddn;
-            if (__dn > 0)
-            {
-                __m = ~__storage_type(0) >> (__bits_per_word - __dn);
-                if ((*__first2.__seg_ & __m) != (__b >> (__first1.__ctz_ + __ddn)))
-                    return false;
-                __first2.__ctz_ = static_cast<unsigned>(__dn);
-            }
-            ++__first1.__seg_;
-            // __first1.__ctz_ = 0;
-        }
-        // __first1.__ctz_ == 0;
-        // do middle words
-        unsigned __clz_r = __bits_per_word - __first2.__ctz_;
-        __storage_type __m = ~__storage_type(0) << __first2.__ctz_;
-        for (; __n >= __bits_per_word; __n -= __bits_per_word, ++__first1.__seg_)
-        {
-            __storage_type __b = *__first1.__seg_;
-            if ((*__first2.__seg_ & __m) != (__b << __first2.__ctz_))
-                return false;
-            ++__first2.__seg_;
-            if ((*__first2.__seg_ & ~__m) != (__b >> __clz_r))
-                return false;
-        }
-        // do last word
-        if (__n > 0)
-        {
-            __m = ~__storage_type(0) >> (__bits_per_word - __n);
-            __storage_type __b = *__first1.__seg_ & __m;
-            __storage_type __dn = std::min(__n, static_cast<difference_type>(__clz_r));
-            __m = (~__storage_type(0) << __first2.__ctz_) & (~__storage_type(0) >> (__clz_r - __dn));
-            if ((*__first2.__seg_ & __m) != (__b << __first2.__ctz_))
-                return false;
-            __first2.__seg_ += (__dn + __first2.__ctz_) / __bits_per_word;
-            __first2.__ctz_ = static_cast<unsigned>((__dn + __first2.__ctz_)  % __bits_per_word);
-            __n -= __dn;
-            if (__n > 0)
-            {
-                __m = ~__storage_type(0) >> (__bits_per_word - __n);
-                if ((*__first2.__seg_ & __m) != (__b >> __dn))
-                    return false;
-            }
-        }
-    }
-    return true;
+  difference_type __n       = __last1 - __first1;
+  if (__n > 0) {
+    if (__first1.__ctz_ != 0) {
+      unsigned __clz_f     = __bits_per_word - __first1.__ctz_;
+      __storage_type __m   = (~__storage_type(0) << __first1.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
+      __storage_type __b   = *__first1.__seg_ & __m;
+      unsigned __clz_r     = __bits_per_word - __first2.__ctz_;
+      __m                  = (~__storage_type(0) << __first2.__ctz_) & (~__storage_type(0) >> (__clz_r - __ddn));
+      if (__first2.__ctz_ > __first1.__ctz_) {
+      } else {
+      __first2.__ctz_ = static_cast<unsigned>((__ddn + __first2.__ctz_) % __bits_per_word);
+      if (__dn > 0) {
+    unsigned __clz_r   = __bits_per_word - __first2.__ctz_;
+    for (; __n >= __bits_per_word; __n -= __bits_per_word, ++__first1.__seg_) {
+    if (__n > 0) {
+      __m                 = ~__storage_type(0) >> (__bits_per_word - __n);
+      __storage_type __b  = *__first1.__seg_ & __m;
+      __m                 = (~__storage_type(0) << __first2.__ctz_) & (~__storage_type(0) >> (__clz_r - __dn));
+      __first2.__ctz_ = static_cast<unsigned>((__dn + __first2.__ctz_) % __bits_per_word);
+      if (__n > 0) {
 }
 
 template <class _Cp, bool _IC1, bool _IC2>
-_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI bool
-__equal_aligned(__bit_iterator<_Cp, _IC1> __first1, __bit_iterator<_Cp, _IC1> __last1,
-                __bit_iterator<_Cp, _IC2> __first2)
-{
-    using _It             = __bit_iterator<_Cp, _IC1>;
-    using difference_type = typename _It::difference_type;
-    using __storage_type  = typename _It::__storage_type;
+_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI bool __equal_aligned(
+    __bit_iterator<_Cp, _IC1> __first1, __bit_iterator<_Cp, _IC1> __last1, __bit_iterator<_Cp, _IC2> __first2) {
 
-    const int __bits_per_word = _It::__bits_per_word;
-    difference_type __n = __last1 - __first1;
-    if (__n > 0)
-    {
-        // do first word
-        if (__first1.__ctz_ != 0)
-        {
-            unsigned __clz = __bits_per_word - __first1.__ctz_;
-            difference_type __dn = std::min(static_cast<difference_type>(__clz), __n);
-            __n -= __dn;
-            __storage_type __m = (~__storage_type(0) << __first1.__ctz_) & (~__storage_type(0) >> (__clz - __dn));
-            if ((*__first2.__seg_ & __m) != (*__first1.__seg_ & __m))
-                return false;
-            ++__first2.__seg_;
-            ++__first1.__seg_;
-            // __first1.__ctz_ = 0;
-            // __first2.__ctz_ = 0;
-        }
-        // __first1.__ctz_ == 0;
-        // __first2.__ctz_ == 0;
-        // do middle words
-        for (; __n >= __bits_per_word; __n -= __bits_per_word, ++__first1.__seg_, ++__first2.__seg_)
-            if (*__first2.__seg_ != *__first1.__seg_)
-                return false;
-        // do last word
-        if (__n > 0)
-        {
-            __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
-            if ((*__first2.__seg_ & __m) != (*__first1.__seg_ & __m))
-                return false;
-        }
-    }
-    return true;
+  difference_type __n       = __last1 - __first1;
+  if (__n > 0) {
+    if (__first1.__ctz_ != 0) {
+      unsigned __clz       = __bits_per_word - __first1.__ctz_;
+    if (__n > 0) {
 }
 
 template <class _Cp, bool _IC1, bool _IC2>
-inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-bool
-equal(__bit_iterator<_Cp, _IC1> __first1, __bit_iterator<_Cp, _IC1> __last1, __bit_iterator<_Cp, _IC2> __first2)
-{
-    if (__first1.__ctz_ == __first2.__ctz_)
-        return std::__equal_aligned(__first1, __last1, __first2);
-    return std::__equal_unaligned(__first1, __last1, __first2);
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool
+equal(__bit_iterator<_Cp, _IC1> __first1, __bit_iterator<_Cp, _IC1> __last1, __bit_iterator<_Cp, _IC2> __first2) {
 }
 
-template <class _Cp, bool _IsConst,
-          typename _Cp::__storage_type>
-class __bit_iterator
-{
+template <class _Cp, bool _IsConst, typename _Cp::__storage_type>
+class __bit_iterator {
 public:
   using difference_type = typename _Cp::difference_type;
   using value_type      = bool;
   using pointer         = __bit_iterator;
 #ifndef _LIBCPP_ABI_BITSET_VECTOR_BOOL_CONST_SUBSCRIPT_RETURN_BOOL
   using reference = __conditional_t<_IsConst, __bit_const_reference<_Cp>, __bit_reference<_Cp> >;
 #else
   using reference = __conditional_t<_IsConst, bool, __bit_reference<_Cp> >;
 #endif
   using iterator_category = random_access_iterator_tag;
 
 private:
   using __storage_type = typename _Cp::__storage_type;
   using __storage_pointer =
       __conditional_t<_IsConst, typename _Cp::__const_storage_pointer, typename _Cp::__storage_pointer>;
 
-    static const unsigned __bits_per_word = _Cp::__bits_per_word;
 
-    __storage_pointer __seg_;
-    unsigned          __ctz_;
+  unsigned __ctz_;
 
 public:
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator() _NOEXCEPT
 #if _LIBCPP_STD_VER >= 14
-    : __seg_(nullptr), __ctz_(0)
+      : __seg_(nullptr),
+        __ctz_(0)
 #endif
-    {}
+  {
+  }
 
-    // When _IsConst=false, this is the copy constructor.
-    // It is non-trivial. Making it trivial would break ABI.
-    // When _IsConst=true, this is a converting constructor;
-    // the copy and move constructors are implicitly generated
-    // and trivial.
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-    __bit_iterator(const __bit_iterator<_Cp, false>& __it) _NOEXCEPT
-        : __seg_(__it.__seg_), __ctz_(__it.__ctz_) {}
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator(const __bit_iterator<_Cp, false>& __it) _NOEXCEPT
+      : __seg_(__it.__seg_),
+        __ctz_(__it.__ctz_) {}
 
-    // When _IsConst=false, we have a user-provided copy constructor,
-    // so we must also provide a copy assignment operator because
-    // the implicit generation of a defaulted one is deprecated.
-    // When _IsConst=true, the assignment operators are
-    // implicitly generated and trivial.
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-    __bit_iterator& operator=(const _If<_IsConst, struct __private_nat, __bit_iterator>& __it) {
-        __seg_ = __it.__seg_;
-        __ctz_ = __it.__ctz_;
-        return *this;
-    }
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator&
+  operator=(const _If<_IsConst, struct __private_nat, __bit_iterator>& __it) {
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference operator*() const _NOEXCEPT {
-        return __conditional_t<_IsConst, __bit_const_reference<_Cp>, __bit_reference<_Cp> >(
-            __seg_, __storage_type(1) << __ctz_);
-    }
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator& operator++()
-    {
-        if (__ctz_ != __bits_per_word-1)
-            ++__ctz_;
-        else
-        {
-            __ctz_ = 0;
-            ++__seg_;
-        }
-        return *this;
-    }
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator& operator++() {
+    if (__ctz_ != __bits_per_word - 1)
+    else {
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator operator++(int)
-    {
-        __bit_iterator __tmp = *this;
-        ++(*this);
-        return __tmp;
-    }
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator operator++(int) {
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator& operator--()
-    {
-        if (__ctz_ != 0)
-            --__ctz_;
-        else
-        {
-            __ctz_ = __bits_per_word - 1;
-            --__seg_;
-        }
-        return *this;
-    }
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator& operator--() {
+    else {
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator operator--(int)
-    {
-        __bit_iterator __tmp = *this;
-        --(*this);
-        return __tmp;
-    }
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator operator--(int) {
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator& operator+=(difference_type __n)
-    {
-        if (__n >= 0)
-            __seg_ += (__n + __ctz_) / __bits_per_word;
-        else
-            __seg_ += static_cast<difference_type>(__n - __bits_per_word + __ctz_ + 1)
-                    / static_cast<difference_type>(__bits_per_word);
-        __n &= (__bits_per_word - 1);
-        __ctz_ = static_cast<unsigned>((__n + __ctz_)  % __bits_per_word);
-        return *this;
-    }
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator& operator+=(difference_type __n) {
+      __seg_ += static_cast<difference_type>(__n - __bits_per_word + __ctz_ + 1) /
+                static_cast<difference_type>(__bits_per_word);
+    __ctz_ = static_cast<unsigned>((__n + __ctz_) % __bits_per_word);
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator& operator-=(difference_type __n)
-    {
-        return *this += -__n;
-    }
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator& operator-=(difference_type __n) {
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator operator+(difference_type __n) const
-    {
-        __bit_iterator __t(*this);
-        __t += __n;
-        return __t;
-    }
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator operator+(difference_type __n) const {
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator operator-(difference_type __n) const
-    {
-        __bit_iterator __t(*this);
-        __t -= __n;
-        return __t;
-    }
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __bit_iterator operator-(difference_type __n) const {
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-    friend __bit_iterator operator+(difference_type __n, const __bit_iterator& __it) {return __it + __n;}
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 friend __bit_iterator
+  operator+(difference_type __n, const __bit_iterator& __it) {
+    return __it + __n;
+  }
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-    friend difference_type operator-(const __bit_iterator& __x, const __bit_iterator& __y)
-        {return (__x.__seg_ - __y.__seg_) * __bits_per_word + __x.__ctz_ - __y.__ctz_;}
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 friend difference_type
+  operator-(const __bit_iterator& __x, const __bit_iterator& __y) {
+    return (__x.__seg_ - __y.__seg_) * __bits_per_word + __x.__ctz_ - __y.__ctz_;
+  }
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference operator[](difference_type __n) const {return *(*this + __n);}
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference operator[](difference_type __n) const {
+    return *(*this + __n);
+  }
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 friend bool operator==(const __bit_iterator& __x, const __bit_iterator& __y)
-        {return __x.__seg_ == __y.__seg_ && __x.__ctz_ == __y.__ctz_;}
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 friend bool
+  operator==(const __bit_iterator& __x, const __bit_iterator& __y) {
+    return __x.__seg_ == __y.__seg_ && __x.__ctz_ == __y.__ctz_;
+  }
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 friend bool operator!=(const __bit_iterator& __x, const __bit_iterator& __y)
-        {return !(__x == __y);}
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 friend bool
+  operator!=(const __bit_iterator& __x, const __bit_iterator& __y) {
+    return !(__x == __y);
+  }
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 friend bool operator<(const __bit_iterator& __x, const __bit_iterator& __y)
-        {return __x.__seg_ < __y.__seg_ || (__x.__seg_ == __y.__seg_ && __x.__ctz_ < __y.__ctz_);}
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 friend bool
+  operator<(const __bit_iterator& __x, const __bit_iterator& __y) {
+    return __x.__seg_ < __y.__seg_ || (__x.__seg_ == __y.__seg_ && __x.__ctz_ < __y.__ctz_);
+  }
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 friend bool operator>(const __bit_iterator& __x, const __bit_iterator& __y)
-        {return __y < __x;}
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 friend bool
+  operator>(const __bit_iterator& __x, const __bit_iterator& __y) {
+    return __y < __x;
+  }
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 friend bool operator<=(const __bit_iterator& __x, const __bit_iterator& __y)
-        {return !(__y < __x);}
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 friend bool
+  operator<=(const __bit_iterator& __x, const __bit_iterator& __y) {
+    return !(__y < __x);
+  }
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 friend bool operator>=(const __bit_iterator& __x, const __bit_iterator& __y)
-        {return !(__x < __y);}
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 friend bool
+  operator>=(const __bit_iterator& __x, const __bit_iterator& __y) {
+    return !(__x < __y);
+  }
 
 private:
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-    explicit __bit_iterator(__storage_pointer __s, unsigned __ctz) _NOEXCEPT
-        : __seg_(__s), __ctz_(__ctz) {}
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit __bit_iterator(
+      __storage_pointer __s, unsigned __ctz) _NOEXCEPT
+      : __seg_(__s),
+        __ctz_(__ctz) {}
 
-    friend typename _Cp::__self;
 
-    friend class __bit_reference<_Cp>;
-    friend class __bit_const_reference<_Cp>;
-    friend class __bit_iterator<_Cp, true>;
-    template <class _Dp> friend struct __bit_array;
-    template <bool _FillValue, class _Dp>
-    _LIBCPP_CONSTEXPR_SINCE_CXX20
-    friend void __fill_n(__bit_iterator<_Dp, false> __first, typename _Dp::size_type __n);
+  template <class _Dp>
+  friend struct __bit_array;
+  _LIBCPP_CONSTEXPR_SINCE_CXX20 friend void __fill_n(__bit_iterator<_Dp, false> __first, typename _Dp::size_type __n);
 
-    template <class _Dp, bool _IC>
-    _LIBCPP_CONSTEXPR_SINCE_CXX20
-    friend __bit_iterator<_Dp, false> __copy_aligned(__bit_iterator<_Dp, _IC> __first,
-                                                     __bit_iterator<_Dp, _IC> __last,
-                                                     __bit_iterator<_Dp, false> __result);
-    template <class _Dp, bool _IC>
-    _LIBCPP_CONSTEXPR_SINCE_CXX20
-    friend __bit_iterator<_Dp, false> __copy_unaligned(__bit_iterator<_Dp, _IC> __first,
-                                                       __bit_iterator<_Dp, _IC> __last,
-                                                       __bit_iterator<_Dp, false> __result);
-    template <class _Dp, bool _IC>
-    _LIBCPP_CONSTEXPR_SINCE_CXX20
-    friend __bit_iterator<_Dp, false> copy(__bit_iterator<_Dp, _IC> __first,
-                                           __bit_iterator<_Dp, _IC> __last,
-                                           __bit_iterator<_Dp, false> __result);
-    template <class _Dp, bool _IC>
-    _LIBCPP_CONSTEXPR_SINCE_CXX20
-    friend __bit_iterator<_Dp, false> __copy_backward_aligned(__bit_iterator<_Dp, _IC> __first,
-                                                              __bit_iterator<_Dp, _IC> __last,
-                                                              __bit_iterator<_Dp, false> __result);
-    template <class _Dp, bool _IC>
-    _LIBCPP_CONSTEXPR_SINCE_CXX20
-    friend __bit_iterator<_Dp, false> __copy_backward_unaligned(__bit_iterator<_Dp, _IC> __first,
-                                                                __bit_iterator<_Dp, _IC> __last,
-                                                                __bit_iterator<_Dp, false> __result);
-    template <class _Dp, bool _IC>
-    _LIBCPP_CONSTEXPR_SINCE_CXX20
-    friend __bit_iterator<_Dp, false> copy_backward(__bit_iterator<_Dp, _IC> __first,
-                                                    __bit_iterator<_Dp, _IC> __last,
-                                                    __bit_iterator<_Dp, false> __result);
-    template <class __C1, class __C2>friend __bit_iterator<__C2, false> __swap_ranges_aligned(__bit_iterator<__C1, false>,
-                                                                                           __bit_iterator<__C1, false>,
-                                                                                           __bit_iterator<__C2, false>);
-    template <class __C1, class __C2>friend __bit_iterator<__C2, false> __swap_ranges_unaligned(__bit_iterator<__C1, false>,
-                                                                                             __bit_iterator<__C1, false>,
-                                                                                             __bit_iterator<__C2, false>);
-    template <class __C1, class __C2>friend __bit_iterator<__C2, false> swap_ranges(__bit_iterator<__C1, false>,
-                                                                                 __bit_iterator<__C1, false>,
-                                                                                 __bit_iterator<__C2, false>);
-    template <class _Dp>
-    _LIBCPP_CONSTEXPR_SINCE_CXX20
-    friend __bit_iterator<_Dp, false> rotate(__bit_iterator<_Dp, false>,
-                                             __bit_iterator<_Dp, false>,
-                                             __bit_iterator<_Dp, false>);
-    template <class _Dp, bool _IC1, bool _IC2>
-    _LIBCPP_CONSTEXPR_SINCE_CXX20
-    friend bool __equal_aligned(__bit_iterator<_Dp, _IC1>,
-                                __bit_iterator<_Dp, _IC1>,
-                                __bit_iterator<_Dp, _IC2>);
-    template <class _Dp, bool _IC1, bool _IC2>
-    _LIBCPP_CONSTEXPR_SINCE_CXX20
-    friend bool __equal_unaligned(__bit_iterator<_Dp, _IC1>,
-                                  __bit_iterator<_Dp, _IC1>,
-                                  __bit_iterator<_Dp, _IC2>);
-    template <class _Dp, bool _IC1, bool _IC2>
-    _LIBCPP_CONSTEXPR_SINCE_CXX20
-    friend bool equal(__bit_iterator<_Dp, _IC1>,
-                      __bit_iterator<_Dp, _IC1>,
-                      __bit_iterator<_Dp, _IC2>);
-    template <bool _ToFind, class _Dp, bool _IC>
-    _LIBCPP_CONSTEXPR_SINCE_CXX20
-    friend __bit_iterator<_Dp, _IC> __find_bool(__bit_iterator<_Dp, _IC>, typename _Dp::size_type);
-    template <bool _ToCount, class _Dp, bool _IC> friend typename __bit_iterator<_Dp, _IC>::difference_type
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
-                   __count_bool(__bit_iterator<_Dp, _IC>, typename _Dp::size_type);
+  _LIBCPP_CONSTEXPR_SINCE_CXX20 friend __bit_iterator<_Dp, false> __copy_aligned(
+      __bit_iterator<_Dp, _IC> __first, __bit_iterator<_Dp, _IC> __last, __bit_iterator<_Dp, false> __result);
+  _LIBCPP_CONSTEXPR_SINCE_CXX20 friend __bit_iterator<_Dp, false> __copy_unaligned(
+      __bit_iterator<_Dp, _IC> __first, __bit_iterator<_Dp, _IC> __last, __bit_iterator<_Dp, false> __result);
+  _LIBCPP_CONSTEXPR_SINCE_CXX20 friend __bit_iterator<_Dp, false>
+  copy(__bit_iterator<_Dp, _IC> __first, __bit_iterator<_Dp, _IC> __last, __bit_iterator<_Dp, false> __result);
+  _LIBCPP_CONSTEXPR_SINCE_CXX20 friend __bit_iterator<_Dp, false> __copy_backward_aligned(
+      __bit_iterator<_Dp, _IC> __first, __bit_iterator<_Dp, _IC> __last, __bit_iterator<_Dp, false> __result);
+  _LIBCPP_CONSTEXPR_SINCE_CXX20 friend __bit_iterator<_Dp, false> __copy_backward_unaligned(
+      __bit_iterator<_Dp, _IC> __first, __bit_iterator<_Dp, _IC> __last, __bit_iterator<_Dp, false> __result);
+  _LIBCPP_CONSTEXPR_SINCE_CXX20 friend __bit_iterator<_Dp, false>
+  copy_backward(__bit_iterator<_Dp, _IC> __first, __bit_iterator<_Dp, _IC> __last, __bit_iterator<_Dp, false> __result);
+  template <class __C1, class __C2>
+  friend __bit_iterator<__C2, false>
+      __swap_ranges_aligned(__bit_iterator<__C1, false>, __bit_iterator<__C1, false>, __bit_iterator<__C2, false>);
+  template <class __C1, class __C2>
+  friend __bit_iterator<__C2, false>
+      __swap_ranges_unaligned(__bit_iterator<__C1, false>, __bit_iterator<__C1, false>, __bit_iterator<__C2, false>);
+  template <class __C1, class __C2>
+  friend __bit_iterator<__C2, false>
+      swap_ranges(__bit_iterator<__C1, false>, __bit_iterator<__C1, false>, __bit_iterator<__C2, false>);
+  _LIBCPP_CONSTEXPR_SINCE_CXX20 friend __bit_iterator<_Dp, false>
+      rotate(__bit_iterator<_Dp, false>, __bit_iterator<_Dp, false>, __bit_iterator<_Dp, false>);
+  _LIBCPP_CONSTEXPR_SINCE_CXX20 friend bool
+      __equal_aligned(__bit_iterator<_Dp, _IC1>, __bit_iterator<_Dp, _IC1>, __bit_iterator<_Dp, _IC2>);
+  _LIBCPP_CONSTEXPR_SINCE_CXX20 friend bool
+      __equal_unaligned(__bit_iterator<_Dp, _IC1>, __bit_iterator<_Dp, _IC1>, __bit_iterator<_Dp, _IC2>);
+  _LIBCPP_CONSTEXPR_SINCE_CXX20 friend bool
+      equal(__bit_iterator<_Dp, _IC1>, __bit_iterator<_Dp, _IC1>, __bit_iterator<_Dp, _IC2>);
+  _LIBCPP_CONSTEXPR_SINCE_CXX20 friend __bit_iterator<_Dp, _IC>
+      __find_bool(__bit_iterator<_Dp, _IC>, typename _Dp::size_type);
+  template <bool _ToCount, class _Dp, bool _IC>
+  friend typename __bit_iterator<_Dp, _IC>::difference_type _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
 };
 
 _LIBCPP_END_NAMESPACE_STD
 
 _LIBCPP_POP_MACROS
 
 #endif // _LIBCPP___BIT_REFERENCE