| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // <new> |
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| 10 | |
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| 11 | // template <class T> constexpr T* launder(T* p) noexcept; |
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| 12 | |
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| 13 | // UNSUPPORTED: c++03, c++11, c++14 |
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| 14 | |
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| 15 | #include <cassert> |
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| 16 | #include <new> |
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| 17 | #include <type_traits> |
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| 18 | |
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| 19 | constexpr int gi = 5; |
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| 20 | constexpr float gf = 8.f; |
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| 21 | |
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| 22 | int main(int, char**) { |
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| 23 | static_assert(std::launder(p: &gi) == &gi, "" ); |
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| 24 | static_assert(std::launder(p: &gf) == &gf, "" ); |
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| 25 | |
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| 26 | const int *i = &gi; |
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| 27 | const float *f = &gf; |
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| 28 | static_assert(std::is_same<decltype(i), decltype(std::launder(p: i))>::value, "" ); |
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| 29 | static_assert(std::is_same<decltype(f), decltype(std::launder(p: f))>::value, "" ); |
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| 30 | |
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| 31 | assert(std::launder(i) == i); |
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| 32 | assert(std::launder(f) == f); |
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| 33 | |
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| 34 | return 0; |
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| 35 | } |
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| 36 | |
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