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//===----------------------------------------------------------------------===//
//
// 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);
// ...
// };
// UNSUPPORTED: c++03, c++11, c++14, c++17
#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-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
std::allocator_traits<A<int> >::allocate(a, 10, nullptr); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
return 0;
}
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