File: launder.nodiscard.verify.cpp

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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//

// <new>

// template <class T> constexpr T* launder(T* p) noexcept;

// UNSUPPORTED: c++03, c++11, c++14
// UNSUPPORTED: c++17 && !stdlib=libc++

#include <new>

void f() {
    int *p = nullptr;
    std::launder(p); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
}