[NFC] Remove no-variadic overloads of __allocator_traits_rebind.

[zoecarver]

Summary

All supported compilers have variadics so we can safely remove the overloads of __allocator_traits_rebind which are only enabled on compilers without variadics.

[ldionne]

Please run the tests in C++03 with Clang and confirm it works. If so, ship it (and thanks for the cleanup)!

[zoecarver]

Resolved by ca5bff18fc63d4f6b7fa2731d7a0a839efc984d8.

libcxx/include/memory

 template <class _Tp, class _Up, bool = __has_rebind_other<_Tp, _Up>::value>
 struct __allocator_traits_rebind
 {
     _LIBCPP_SUPPRESS_DEPRECATED_PUSH
     typedef _LIBCPP_NODEBUG_TYPE typename _Tp::template rebind<_Up>::other type;
     _LIBCPP_SUPPRESS_DEPRECATED_POP
 };
 
-#ifndef _LIBCPP_HAS_NO_VARIADICS
-
 template <template <class, class...> class _Alloc, class _Tp, class ..._Args, class _Up>
 struct __allocator_traits_rebind<_Alloc<_Tp, _Args...>, _Up, true>
 {
     _LIBCPP_SUPPRESS_DEPRECATED_PUSH
     typedef _LIBCPP_NODEBUG_TYPE typename _Alloc<_Tp, _Args...>::template rebind<_Up>::other type;
     _LIBCPP_SUPPRESS_DEPRECATED_POP
 };
 
 template <template <class, class...> class _Alloc, class _Tp, class ..._Args, class _Up>
 struct __allocator_traits_rebind<_Alloc<_Tp, _Args...>, _Up, false>
 {
     typedef _LIBCPP_NODEBUG_TYPE _Alloc<_Up, _Args...> type;
 };
 
-#else  // _LIBCPP_HAS_NO_VARIADICS
-
-template <template <class> class _Alloc, class _Tp, class _Up>
-struct __allocator_traits_rebind<_Alloc<_Tp>, _Up, true>
-{
-    typedef typename _Alloc<_Tp>::template rebind<_Up>::other type;
-};
-
-template <template <class> class _Alloc, class _Tp, class _Up>
-struct __allocator_traits_rebind<_Alloc<_Tp>, _Up, false>
-{
-    typedef _Alloc<_Up> type;
-};
-
-template <template <class, class> class _Alloc, class _Tp, class _A0, class _Up>
-struct __allocator_traits_rebind<_Alloc<_Tp, _A0>, _Up, true>
-{
-    typedef typename _Alloc<_Tp, _A0>::template rebind<_Up>::other type;
-};
-
-template <template <class, class> class _Alloc, class _Tp, class _A0, class _Up>
-struct __allocator_traits_rebind<_Alloc<_Tp, _A0>, _Up, false>
-{
-    typedef _Alloc<_Up, _A0> type;
-};
-
-template <template <class, class, class> class _Alloc, class _Tp, class _A0,
-                                         class _A1, class _Up>
-struct __allocator_traits_rebind<_Alloc<_Tp, _A0, _A1>, _Up, true>
-{
-    typedef typename _Alloc<_Tp, _A0, _A1>::template rebind<_Up>::other type;
-};
-
-template <template <class, class, class> class _Alloc, class _Tp, class _A0,
-                                         class _A1, class _Up>
-struct __allocator_traits_rebind<_Alloc<_Tp, _A0, _A1>, _Up, false>
-{
-    typedef _Alloc<_Up, _A0, _A1> type;
-};
-
-template <template <class, class, class, class> class _Alloc, class _Tp, class _A0,
-                                                class _A1, class _A2, class _Up>
-struct __allocator_traits_rebind<_Alloc<_Tp, _A0, _A1, _A2>, _Up, true>
-{
-    typedef typename _Alloc<_Tp, _A0, _A1, _A2>::template rebind<_Up>::other type;
-};
-
-template <template <class, class, class, class> class _Alloc, class _Tp, class _A0,
-                                                class _A1, class _A2, class _Up>
-struct __allocator_traits_rebind<_Alloc<_Tp, _A0, _A1, _A2>, _Up, false>
-{
-    typedef _Alloc<_Up, _A0, _A1, _A2> type;
-};
-
-#endif  // _LIBCPP_HAS_NO_VARIADICS
-
 #ifndef _LIBCPP_CXX03_LANG
 
 _LIBCPP_SUPPRESS_DEPRECATED_PUSH
 template <class _Alloc, class _SizeType, class _ConstVoidPtr>
 auto
 __has_allocate_hint_test(_Alloc&& __a, _SizeType&& __sz, _ConstVoidPtr&& __p)
     -> decltype((void)__a.allocate(__sz, __p), true_type());
 _LIBCPP_SUPPRESS_DEPRECATED_POP