| //===----------------------------------------------------------------------===// |
| // |
| // 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 pointer allocate(allocator_type& a, size_type n); |
| // ... |
| // }; |
| |
| // UNSUPPORTED: c++98, c++03, c++11, c++14, c++17 |
| // UNSUPPORTED: clang-3.3, clang-3.4, clang-3.5, clang-3.6, clang-3.7, clang-3.8 |
| |
| #include <memory> |
| #include <cstdint> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| template <class T> |
| struct A |
| { |
| typedef T value_type; |
| |
| value_type* allocate(std::size_t n) |
| { |
| assert(n == 12); |
| return reinterpret_cast<value_type*>(static_cast<std::uintptr_t>(0xEEADBEEF)); |
| } |
| value_type* allocate(std::size_t n, const void* p) |
| { |
| assert(n == 11); |
| assert(p == 0); |
| return reinterpret_cast<value_type*>(static_cast<std::uintptr_t>(0xFEADBEEF)); |
| } |
| }; |
| |
| int main(int, char**) |
| { |
| A<int> a; |
| std::allocator_traits<A<int> >::allocate(a, 10); // expected-error {{ignoring return value of function declared with 'nodiscard' attribute}} |
| std::allocator_traits<A<int> >::allocate(a, 10, nullptr); // expected-error {{ignoring return value of function declared with 'nodiscard' attribute}} |
| |
| return 0; |
| } |