libcxx/test/std/numerics/complex.number/complex/bit_cast.pass.cpp

   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 // UNSUPPORTED: c++03, c++11, c++14, c++17
  10
  11 // Make sure that std::bit_cast works with std::complex. Test case extracted from
  12 // https://github.com/llvm/llvm-project/issues/94620.
  13
  14 #include <bit>
  15 #include <complex>
  16
  17 template <class T>
  18 constexpr void test() {
  19   using Complex                       = std::complex<T>;
  20   unsigned char data[sizeof(Complex)] = {0};
  21
  22   [[maybe_unused]] Complex c = std::bit_cast<Complex>(data);
  23 }
  24
  25 constexpr bool test_all() {
  26   test<float>();
  27   test<double>();
  28   test<long double>();
  29   return true;
  30 }
  31
  32 int main(int, char**) {
  33   test_all();
  34   static_assert(test_all());
  35   return 0;
  36 }