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++98, c++03, c++11, c++14, c++17
15 // UNSUPPORTED: clang-3.3, clang-3.4, clang-3.5, clang-3.6, clang-3.7, clang-3.8
16
17 #include <new>
18 #include <cassert>
19
20 #include "test_macros.h"
21
main(int,char **)22 int main(int, char**)
23 {
24 int *p = nullptr;
25 std::launder(p); // expected-error {{ignoring return value of function declared with 'nodiscard' attribute}}
26
27 return 0;
28 }
29