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
14 
15 #include <new>
16 #include <cassert>
17 
18 #include "test_macros.h"
19 
20 constexpr int gi = 5;
21 constexpr float gf = 8.f;
22 
23 int main(int, char**) {
24     static_assert(std::launder(&gi) == &gi, "" );
25     static_assert(std::launder(&gf) == &gf, "" );
26 
27     const int *i = &gi;
28     const float *f = &gf;
29     static_assert(std::is_same<decltype(i), decltype(std::launder(i))>::value, "");
30     static_assert(std::is_same<decltype(f), decltype(std::launder(f))>::value, "");
31 
32     assert(std::launder(i) == i);
33     assert(std::launder(f) == f);
34 
35   return 0;
36 }
37