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// pow(const T& x, const complex<T>& y);
14
15#include <complex>
16#include <cassert>
17
18#include "test_macros.h"
19#include "../cases.h"
20
21template <class T>
22void
23test(const T& a, const std::complex<T>& b, std::complex<T> x)
24{
25 std::complex<T> c = pow(a, b);
26 is_about(real(c), real(x));
27 assert(std::abs(imag(c)) < 1.e-6);
28}
29
30template <class T>
31void
32test()
33{
34 test(T(2), std::complex<T>(2), std::complex<T>(4));
35}
36
37void test_edges()
38{
39 const unsigned N = sizeof(testcases) / sizeof(testcases[0]);
40 for (unsigned i = 0; i < N; ++i)
41 {
42 for (unsigned j = 0; j < N; ++j)
43 {
44 std::complex<double> r = pow(real(testcases[i]), testcases[j]);
45 std::complex<double> z = exp(testcases[j] * log(std::complex<double>(real(testcases[i]))));
46 if (std::isnan(x: real(z: r)))
47 assert(std::isnan(real(z)));
48 else
49 {
50 assert(real(r) == real(z));
51 }
52 if (std::isnan(x: imag(z: r)))
53 assert(std::isnan(imag(z)));
54 else
55 {
56 assert(imag(r) == imag(z));
57 }
58 }
59 }
60}
61
62int main(int, char**)
63{
64 test<float>();
65 test<double>();
66 test<long double>();
67 test_edges();
68
69 return 0;
70}
71

source code of libcxx/test/std/numerics/complex.number/complex.transcendentals/pow_scalar_complex.pass.cpp