//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <memory>
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// template <class Alloc>
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// struct allocator_traits
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// {
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// static pointer allocate(allocator_type& a, size_type n);
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// ...
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// };
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// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
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// UNSUPPORTED: clang-3.3, clang-3.4, clang-3.5, clang-3.6, clang-3.7, clang-3.8
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#include <memory>
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#include <cstdint>
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#include <cassert>
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#include "test_macros.h"
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template <class T>
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struct A
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{
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typedef T value_type;
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value_type* allocate(std::size_t n)
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{
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assert(n == 12);
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return reinterpret_cast<value_type*>(static_cast<std::uintptr_t>(0xEEADBEEF));
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}
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value_type* allocate(std::size_t n, const void* p)
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{
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assert(n == 11);
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assert(p == 0);
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return reinterpret_cast<value_type*>(static_cast<std::uintptr_t>(0xFEADBEEF));
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}
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};
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int main()
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{
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A<int> a;
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std::allocator_traits<A<int> >::allocate(a, 10); // expected-error {{ignoring return value of function declared with 'nodiscard' attribute}}
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std::allocator_traits<A<int> >::allocate(a, 10, nullptr); // expected-error {{ignoring return value of function declared with 'nodiscard' attribute}}
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}
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