// -*- 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.
//
//===----------------------------------------------------------------------===//

// <iterator>

// <iterator>
// template <class C> constexpr auto empty(const C& c) -> decltype(c.empty());

// 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 <vector>
#include <iterator>

#include "test_macros.h"

int main ()
{
    std::vector<int> c;
    std::empty(c);  // expected-error {{ignoring return value of function declared with 'nodiscard' attribute}}
}