| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <memory> |
| |
| // template <class Alloc> |
| // struct allocator_traits |
| // { |
| // template <class T> using rebind_alloc = Alloc::rebind<U>::other | Alloc<T, Args...>; |
| // ... |
| // }; |
| |
| #include <memory> |
| #include <type_traits> |
| |
| #include "test_macros.h" |
| |
| template <class T> |
| struct ReboundA {}; |
| |
| template <class T> |
| struct A |
| { |
| typedef T value_type; |
| |
| template <class U> struct rebind {typedef ReboundA<U> other;}; |
| }; |
| |
| template <class T, class U> |
| struct ReboundB {}; |
| |
| template <class T, class U> |
| struct B |
| { |
| typedef T value_type; |
| |
| template <class V> struct rebind {typedef ReboundB<V, U> other;}; |
| }; |
| |
| template <class T> |
| struct C |
| { |
| typedef T value_type; |
| }; |
| |
| template <class T, class U> |
| struct D |
| { |
| typedef T value_type; |
| }; |
| |
| template <class T> |
| struct E |
| { |
| typedef T value_type; |
| |
| template <class U> struct rebind {typedef ReboundA<U> otter;}; |
| }; |
| |
| template <class T> |
| struct F { |
| typedef T value_type; |
| private: |
| template <class> |
| struct rebind { typedef void other; }; |
| }; |
| |
| template <class T> |
| struct G { |
| typedef T value_type; |
| template <class> |
| struct rebind { |
| private: |
| typedef void other; |
| }; |
| }; |
| |
| int main(int, char**) |
| { |
| #if TEST_STD_VER >= 11 |
| static_assert((std::is_same<std::allocator_traits<A<char> >::rebind_alloc<double>, ReboundA<double> >::value), ""); |
| static_assert((std::is_same<std::allocator_traits<B<int, char> >::rebind_alloc<double>, ReboundB<double, char> >::value), ""); |
| static_assert((std::is_same<std::allocator_traits<C<char> >::rebind_alloc<double>, C<double> >::value), ""); |
| static_assert((std::is_same<std::allocator_traits<D<int, char> >::rebind_alloc<double>, D<double, char> >::value), ""); |
| static_assert((std::is_same<std::allocator_traits<E<char> >::rebind_alloc<double>, E<double> >::value), ""); |
| static_assert((std::is_same<std::allocator_traits<F<char> >::rebind_alloc<double>, F<double> >::value), ""); |
| static_assert((std::is_same<std::allocator_traits<G<char> >::rebind_alloc<double>, G<double> >::value), ""); |
| #else |
| static_assert((std::is_same<std::allocator_traits<A<char> >::rebind_alloc<double>::other, ReboundA<double> >::value), ""); |
| static_assert((std::is_same<std::allocator_traits<B<int, char> >::rebind_alloc<double>::other, ReboundB<double, char> >::value), ""); |
| static_assert((std::is_same<std::allocator_traits<C<char> >::rebind_alloc<double>::other, C<double> >::value), ""); |
| static_assert((std::is_same<std::allocator_traits<D<int, char> >::rebind_alloc<double>::other, D<double, char> >::value), ""); |
| static_assert((std::is_same<std::allocator_traits<E<char> >::rebind_alloc<double>::other, E<double> >::value), ""); |
| #endif |
| |
| return 0; |
| } |