1 // -*- C++ -*-
2 //===----------------------------------------------------------------------===//
3 //
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <new>
11 
12 // template <class T> constexpr T* launder(T* p) noexcept;
13 
14 // UNSUPPORTED: c++03, c++11, c++14, c++17
15 
16 #include <new>
17 #include <cassert>
18 
19 #include "test_macros.h"
20 
main(int,char **)21 int main(int, char**)
22 {
23     int *p = nullptr;
24     std::launder(p); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
25 
26     return 0;
27 }
28