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