| //===----------------------------------------------------------------------===// | 
 | // | 
 | // 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 | 
 |  | 
 | // check that <cstddef> functions are marked [[nodiscard]] | 
 |  | 
 | #include <cstddef> | 
 |  | 
 | #include "test_macros.h" | 
 |  | 
 | void test() { | 
 |   std::byte b{42}; | 
 |   std::to_integer<int>(b); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} | 
 | } |