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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// 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.
//
//===----------------------------------------------------------------------===//
// <unordered_set>
// class unordered_set
// bool empty() const noexcept;
// 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 <unordered_set>
#include "test_macros.h"
int main ()
{
std::unordered_set<int> c;
c.empty(); // expected-error {{ignoring return value of function declared with 'nodiscard' attribute}}
}
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