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// void real(T val); // constexpr in C++20
12// void imag(T val); // constexpr in C++20
13
14#include <complex>
15#include <cassert>
16
17#include "test_macros.h"
18
19template <class T>
20TEST_CONSTEXPR_CXX20
21void
22test_constexpr()
23{
24#if TEST_STD_VER > 11
25 constexpr std::complex<T> c1;
26 static_assert(c1.real() == 0, "");
27 static_assert(c1.imag() == 0, "");
28 constexpr std::complex<T> c2(3);
29 static_assert(c2.real() == 3, "");
30 static_assert(c2.imag() == 0, "");
31 constexpr std::complex<T> c3(3, 4);
32 static_assert(c3.real() == 3, "");
33 static_assert(c3.imag() == 4, "");
34#endif
35}
36
37template <class T>
38TEST_CONSTEXPR_CXX20
39bool
40test()
41{
42 std::complex<T> c;
43 assert(c.real() == 0);
44 assert(c.imag() == 0);
45 c.real(3.5);
46 assert(c.real() == 3.5);
47 assert(c.imag() == 0);
48 c.imag(4.5);
49 assert(c.real() == 3.5);
50 assert(c.imag() == 4.5);
51 c.real(-4.5);
52 assert(c.real() == -4.5);
53 assert(c.imag() == 4.5);
54 c.imag(-5.5);
55 assert(c.real() == -4.5);
56 assert(c.imag() == -5.5);
57
58 test_constexpr<T>();
59 return true;
60}
61
62int main(int, char**) {
63 test<float>();
64 test<double>();
65 test<long double>();
66 test_constexpr<int>();
67
68#if TEST_STD_VER >= 20
69 static_assert(test<float>());
70 static_assert(test<double>());
71 static_assert(test<long double>());
72#endif
73
74 return 0;
75}
76

source code of libcxx/test/std/numerics/complex.number/complex.members/real_imag.pass.cpp