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// tanh(const complex<T>& x);
14
15#include <complex>
16#include <cassert>
17
18#include "test_macros.h"
19#include "../cases.h"
20
21template <class T>
22void
23test(const std::complex<T>& c, std::complex<T> x)
24{
25 assert(tanh(c) == x);
26}
27
28template <class T>
29void
30test()
31{
32 test(std::complex<T>(0, 0), std::complex<T>(0, 0));
33}
34
35void test_edges()
36{
37 const unsigned N = sizeof(testcases) / sizeof(testcases[0]);
38 for (unsigned i = 0; i < N; ++i)
39 {
40 std::complex<double> r = tanh(testcases[i]);
41 if (testcases[i].real() == 0 && testcases[i].imag() == 0)
42 {
43 assert(r.real() == 0);
44 assert(std::signbit(r.real()) == std::signbit(testcases[i].real()));
45 assert(r.imag() == 0);
46 assert(std::signbit(r.imag()) == std::signbit(testcases[i].imag()));
47 }
48 else if (std::isfinite(testcases[i].real()) && std::isinf(testcases[i].imag()))
49 {
50 assert(std::isnan(r.real()));
51 assert(std::isnan(r.imag()));
52 }
53 else if (std::isfinite(testcases[i].real()) && std::isnan(testcases[i].imag()))
54 {
55 assert(std::isnan(r.real()));
56 assert(std::isnan(r.imag()));
57 }
58 else if (std::isinf(testcases[i].real()) && std::isfinite(testcases[i].imag()))
59 {
60 assert(r.real() == (testcases[i].real() > 0 ? 1 : -1));
61 assert(r.imag() == 0);
62 assert(std::signbit(r.imag()) == std::signbit(sin(2 * testcases[i].imag())));
63 }
64 else if (std::isinf(testcases[i].real()) && std::isinf(testcases[i].imag()))
65 {
66 assert(r.real() == (testcases[i].real() > 0 ? 1 : -1));
67 assert(r.imag() == 0);
68 }
69 else if (std::isinf(testcases[i].real()) && std::isnan(testcases[i].imag()))
70 {
71 assert(r.real() == (testcases[i].real() > 0 ? 1 : -1));
72 assert(r.imag() == 0);
73 }
74 else if (std::isnan(testcases[i].real()) && testcases[i].imag() == 0)
75 {
76 assert(std::isnan(r.real()));
77 assert(r.imag() == 0);
78 assert(std::signbit(r.imag()) == std::signbit(testcases[i].imag()));
79 }
80 else if (std::isnan(testcases[i].real()) && std::isfinite(testcases[i].imag()))
81 {
82 assert(std::isnan(r.real()));
83 assert(std::isnan(r.imag()));
84 }
85 else if (std::isnan(testcases[i].real()) && std::isnan(testcases[i].imag()))
86 {
87 assert(std::isnan(r.real()));
88 assert(std::isnan(r.imag()));
89 }
90 }
91}
92
93int main(int, char**)
94{
95 test<float>();
96 test<double>();
97 test<long double>();
98 test_edges();
99
100 return 0;
101}
102

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