libcxx/test/std/numerics/complex.number/complex.ops/unary_minus.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 // <complex>
  10
  11 // template<class T>
  12 //   complex<T>
  13 //   operator-(const complex<T>& lhs); // constexpr in C++20
  14
  15 #include <complex>
  16 #include <cassert>
  17
  18 #include "test_macros.h"
  19
  20 template <class T>
  21 TEST_CONSTEXPR_CXX20
  22 bool
  23 test()
  24 {
  25     assert(-std::complex<T>(1.5, -2.5) == std::complex<T>(-1.5, 2.5));
  26     assert(-std::complex<T>(-1.5, 2.5) == std::complex<T>(1.5, -2.5));
  27     return true;
  28 }
  29
  30 int main(int, char**)
  31 {
  32     test<float>();
  33     test<double>();
  34     test<long double>();
  35
  36 #if TEST_STD_VER > 17
  37     static_assert(test<float>());
  38     static_assert(test<double>());
  39     static_assert(test<long double>());
  40 #endif
  41
  42   return 0;
  43 }