//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <stack>
// class stack
// bool empty() const noexcept;
// UNSUPPORTED: c++03, c++11, c++14, c++17
#include <stack>
void f() {
std::stack<int> c;
c.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
}