Arthur O'Dwyer d4b59a05fc [libc++] Remove "// -*- C++ -*-" comments from all .cpp files. NFCI.
Even if these comments have a benefit in .h files (for editors that
care about language but can't be configured to treat .h as C++ code),
they certainly have no benefit for files with the .cpp extension.

Discussed in D110794.
2021-10-01 12:06:59 -04:00

31 lines
833 B
C++

//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <array>
// class array
// bool empty() const noexcept;
// UNSUPPORTED: c++03, c++11, c++14, c++17
#include <array>
#include "test_macros.h"
int main(int, char**)
{
std::array<int, 1> c;
c.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
std::array<int, 0> c0;
c0.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
return 0;
}