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// complex& operator+=(const complex& rhs); // constexpr in C++20
12
13#include <complex>
14#include <cassert>
15
16#include "test_macros.h"
17
18template <class T>
19TEST_CONSTEXPR_CXX20
20bool
21test()
22{
23 std::complex<T> c;
24 const std::complex<T> c2(1.5, 2.5);
25 assert(c.real() == 0);
26 assert(c.imag() == 0);
27 c += c2;
28 assert(c.real() == 1.5);
29 assert(c.imag() == 2.5);
30 c += c2;
31 assert(c.real() == 3);
32 assert(c.imag() == 5);
33
34 std::complex<T> c3;
35
36 c3 = c;
37 std::complex<int> ic (1,1);
38 c3 += ic;
39 assert(c3.real() == 4);
40 assert(c3.imag() == 6);
41
42 c3 = c;
43 std::complex<float> fc (1,1);
44 c3 += fc;
45 assert(c3.real() == 4);
46 assert(c3.imag() == 6);
47 return true;
48}
49
50int main(int, char**)
51{
52 test<float>();
53 test<double>();
54 test<long double>();
55
56#if TEST_STD_VER >= 20
57 static_assert(test<float>());
58 static_assert(test<double>());
59 static_assert(test<long double>());
60#endif
61
62 return 0;
63}
64

source code of libcxx/test/std/numerics/complex.number/complex.member.ops/plus_equal_complex.pass.cpp