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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <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()
{
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}}
}
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