//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// check that <functional> functions are marked [[nodiscard]]
#include <functional>
#include "test_macros.h"
void test() {
int i = 0;
std::identity()(i); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
}