llvm/libcxx/test/std/numerics/complex.number/complex.member.ops/plus_equal_complex.pass.cpp

//===----------------------------------------------------------------------===//
//
// 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>

// complex& operator+=(const complex& rhs); // constexpr in C++20

#include <complex>
#include <cassert>

#include "test_macros.h"

template <class T>
TEST_CONSTEXPR_CXX20
bool
test()
{
    std::complex<T> c;
    const std::complex<T> c2(1.5, 2.5);
    assert(c.real() == 0);
    assert(c.imag() == 0);
    c += c2;
    assert(c.real() == 1.5);
    assert(c.imag() == 2.5);
    c += c2;
    assert(c.real() == 3);
    assert(c.imag() == 5);

    std::complex<T> c3;

    c3 = c;
    std::complex<int> ic (1,1);
    c3 += ic;
    assert(c3.real() == 4);
    assert(c3.imag() == 6);

    c3 = c;
    std::complex<float> fc (1,1);
    c3 += fc;
    assert(c3.real() == 4);
    assert(c3.imag() == 6);
    return true;
}

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

#if TEST_STD_VER >= 20
    static_assert(test<float>());
    static_assert(test<double>());
    static_assert(test<long double>());
#endif

    return 0;
}