//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

// <complex>

// template<class T>
//   complex<T>
//   operator-(const complex<T>& lhs, const complex<T>& rhs); // constexpr in C++20

#include <complex>
#include <cassert>

#include "test_macros.h"

template <class T>
TEST_CONSTEXPR_CXX20
bool
test()
{
    {
    const std::complex<T> lhs(1.5, 2.5);
    const std::complex<T> rhs(3.5, 4.5);
    assert(lhs - rhs == std::complex<T>(-2.0, -2.0));
    }
    {
    const std::complex<T> lhs(1.5, -2.5);
    const std::complex<T> rhs(-3.5, 4.5);
    assert(lhs - rhs == std::complex<T>(5.0, -7.0));
    }
    return true;
}

int main(int, char**)
{
    test<float>();
    test<double>();
    test<long double>();

#if TEST_STD_VER > 17
    static_assert(test<float>());
    static_assert(test<double>());
    static_assert(test<long double>());
#endif

  return 0;
}