Enable __cpp_lib_concepts for EDG, part 1

stl/inc/memory

@@ -526,7 +526,11 @@ namespace ranges {
             noexcept(noexcept(::new (static_cast<void*>(_Location))
                     _Ty(_STD forward<_Types>(_Args)...))) /* strengthened */ {
             // clang-format on
+#ifdef __EDG__
+            return _STD construct_at(_Location, _STD forward<_Types>(_Args)...);
+#else // ^^^ EDG / Other vvv
             _MSVC_CONSTEXPR return ::new (static_cast<void*>(_Location)) _Ty(_STD forward<_Types>(_Args)...);
+#endif // ^^^ Other ^^^
         }
     };
 

stl/inc/ranges

@@ -57,9 +57,17 @@ namespace ranges {
     template <sized_range _Ty>
     inline constexpr auto _Compile_time_max_size<_Ty> = (numeric_limits<range_size_t<_Ty>>::max)();
 
+#ifdef __EDG__ // TRANSITION, VSO-1898880
+    template <class _Ty>
+    concept _Constant_sized_range = sized_range<_Ty> && requires { typename _Require_constant<_Ty::size()>; };
+
+    template <_Constant_sized_range _Ty>
+    inline constexpr auto _Compile_time_max_size<_Ty> = _Ty::size();
+#else // ^^^ workaround / no workaround vvv
     template <sized_range _Ty>
         requires requires { typename _Require_constant<_Ty::size()>; }
     inline constexpr auto _Compile_time_max_size<_Ty> = _Ty::size();
+#endif // ^^^ no workaround ^^^
 
     template <class _Ty, size_t _Size>
     inline constexpr auto _Compile_time_max_size<_Ty[_Size]> = _Size;
@@ -9768,7 +9776,7 @@ namespace ranges {
     template <class _Rng>
     _NODISCARD consteval int _Cartesian_product_max_size_bit_width() {
         using _Size_type = decltype(_Compile_time_max_size<_Rng>);
-        if constexpr (requires(_Size_type _Val) { _STD bit_width(_Val); }) {
+        if constexpr (requires { _STD bit_width(_Compile_time_max_size<_Rng>); }) {
             return _STD bit_width(_Compile_time_max_size<_Rng>);
         } else {
             return numeric_limits<_Size_type>::digits;

stl/inc/tuple

@@ -186,7 +186,7 @@ template <class... _Types, class _Other, size_t... _Indices>
 inline constexpr bool _Can_construct_values_from_tuple_like_v<tuple<_Types...>, _Other, index_sequence<_Indices...>> =
     conjunction_v<is_constructible<_Types, decltype(_STD get<_Indices>(_STD declval<_Other>()))>...>;
 
-#ifdef __clang__ // TRANSITION, LLVM-59827
+#if defined(__clang__) || defined(__EDG__) // TRANSITION, LLVM-59827 and VSO-1900279
 template <class _TupleLike, class _Tuple>
 concept _Can_construct_from_tuple_like =
     _Different_from<_TupleLike, _Tuple> && _Tuple_like<_TupleLike> && !_Is_subrange_v<remove_cvref_t<_TupleLike>>
@@ -195,16 +195,16 @@ concept _Can_construct_from_tuple_like =
     && (tuple_size_v<_Tuple> != 1
         || (!is_convertible_v<_TupleLike, tuple_element_t<0, _Tuple>>
             && !is_constructible_v<tuple_element_t<0, _Tuple>, _TupleLike>) );
-#endif // defined(__clang__)
+#endif // defined(__clang__) || defined(__EDG__)
 
 template <class _TTuple, class _UTuple, class _Indices = make_index_sequence<tuple_size_v<_UTuple>>>
 struct _Three_way_comparison_result_with_tuple_like {};
 
 template <class... _TTypes, class _UTuple, size_t... _Indices>
     requires
-#ifndef __clang__ // TRANSITION, DevCom-10265237
+#if !defined(__clang__) && !defined(__EDG__) // TRANSITION, DevCom-10265237
     (sizeof...(_TTypes) == sizeof...(_Indices)) &&
-#endif // !defined(__clang__)
+#endif // ^^^ workaround ^^^
     (requires { typename _Synth_three_way_result<_TTypes, tuple_element_t<_Indices, _UTuple>>; } && ...)
 struct _Three_way_comparison_result_with_tuple_like<tuple<_TTypes...>, _UTuple, index_sequence<_Indices...>> {
     using type = common_comparison_category_t<_Synth_three_way_result<_TTypes, tuple_element_t<_Indices, _UTuple>>...>;
@@ -432,7 +432,7 @@ public:
         negation_v<conjunction<is_convertible<decltype(_STD get<0>(_STD declval<_Other>())), _This>,
             is_convertible<decltype(_STD get<_Indices + 1>(_STD declval<_Other>())), _Rest>...>>;
 
-#ifdef __clang__ // TRANSITION, LLVM-59827
+#if defined(__clang__) || defined(__EDG__) // TRANSITION, LLVM-59827 and VSO-1900279
     template <class _Other, enable_if_t<_Can_construct_from_tuple_like<_Other, tuple>, int> = 0>
 #else // ^^^ workaround / no workaround vvv
     template <_Different_from<tuple> _Other>
@@ -540,7 +540,7 @@ public:
         : tuple(_Alloc_unpack_tuple_t{}, _Al, _STD move(_Right)) {}
 
 #ifdef __cpp_lib_concepts
-#ifdef __clang__ // TRANSITION, LLVM-59827
+#if defined(__clang__) || defined(__EDG__) // TRANSITION, LLVM-59827 and VSO-1900279
     template <class _Alloc, class _Other, enable_if_t<_Can_construct_from_tuple_like<_Other, tuple>, int> = 0>
 #else // ^^^ workaround / no workaround vvv
     template <class _Alloc, _Different_from<tuple> _Other>

stl/inc/utility

@@ -209,12 +209,12 @@ concept _Tuple_like = _Tuple_like_impl<remove_cvref_t<_Ty>>;
 template <class _Ty>
 concept _Pair_like = _Tuple_like<_Ty> && tuple_size_v<remove_cvref_t<_Ty>> == 2;
 
-#ifdef __clang__ // TRANSITION, LLVM-59827
+#if defined(__clang__) || defined(__EDG__) // TRANSITION, LLVM-59827 and VSO-1900279
 template <class _PairLike, class _Ty1, class _Ty2>
 concept _Can_construct_from_pair_like = _Pair_like<_PairLike> && !_Is_subrange_v<remove_cvref_t<_PairLike>>
                                      && is_constructible_v<_Ty1, decltype(_STD get<0>(_STD declval<_PairLike>()))>
                                      && is_constructible_v<_Ty2, decltype(_STD get<1>(_STD declval<_PairLike>()))>;
-#endif // defined(__clang__)
+#endif // defined(__clang__) || defined(__EDG__)
 #endif // _HAS_CXX23
 #endif // defined(__cpp_lib_concepts)
 
@@ -289,7 +289,7 @@ struct pair { // store a pair of values
         : first(_STD forward<const _Other1>(_Right.first)), second(_STD forward<const _Other2>(_Right.second)) {}
 
 #ifdef __cpp_lib_concepts
-#ifdef __clang__ // TRANSITION, LLVM-59827
+#if defined(__clang__) || defined(__EDG__) // TRANSITION, LLVM-59827 and VSO-1900279
     template <class _Other, enable_if_t<_Can_construct_from_pair_like<_Other, _Ty1, _Ty2>, int> = 0>
 #else // ^^^ workaround / no workaround vvv
     template <_Pair_like _Other>

stl/inc/xutility

@@ -230,7 +230,7 @@ struct _Get_rebind_alias<_Ty, _Other, void_t<typename _Ty::template rebind<_Othe
 };
 
 #if _HAS_CXX20
-#ifdef __EDG__ // TRANSITION, DevCom-1691516
+#if defined(__clang__) || defined(__EDG__) // TRANSITION, DevCom-1691516
 // per LWG-3888
 _EXPORT_STD template <class _Ty, class... _Types,
     class = void_t<decltype(::new(static_cast<void*>(_STD declval<_Ty*>())) _Ty(_STD declval<_Types>()...))>>
@@ -3972,6 +3972,9 @@ struct _Move_iterator_category {
 
 _EXPORT_STD template <class _Iter>
 class move_iterator : public _Move_iterator_category<_Iter> {
+private:
+    _Iter _Current{};
+
 public:
     using iterator_type   = _Iter;
     using value_type      = _Iter_value_t<_Iter>;
@@ -4211,9 +4214,6 @@ public:
     _NODISCARD constexpr iterator_type&& _Get_current() && noexcept {
         return _STD move(_Current);
     }
-
-private:
-    iterator_type _Current{};
 };
 
 _EXPORT_STD template <class _Iter1, class _Iter2>