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