| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // { |
| // static constexpr pointer allocate(allocator_type& a, size_type n); |
| // ... |
| // }; |
| |
| #include <memory> |
| #include <cstdint> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #include "incomplete_type_helper.h" |
| |
| template <class T> |
| struct A |
| { |
| typedef T value_type; |
| |
| TEST_CONSTEXPR_CXX20 A() {} |
| |
| TEST_CONSTEXPR_CXX20 value_type* allocate(std::size_t n) |
| { |
| assert(n == 10); |
| return &storage; |
| } |
| |
| value_type storage; |
| }; |
| |
| TEST_CONSTEXPR_CXX20 bool test() |
| { |
| { |
| A<int> a; |
| assert(std::allocator_traits<A<int> >::allocate(a, 10) == &a.storage); |
| } |
| { |
| typedef A<IncompleteHolder*> Alloc; |
| Alloc a; |
| assert(std::allocator_traits<Alloc>::allocate(a, 10) == &a.storage); |
| } |
| |
| return true; |
| } |
| |
| int main(int, char**) |
| { |
| test(); |
| #if TEST_STD_VER > 17 |
| static_assert(test()); |
| #endif |
| return 0; |
| } |