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 //   proj(const complex<T>& x);
14 
15 #include <complex>
16 #include <cassert>
17 
18 #include "../cases.h"
19 
20 template <class T>
21 void
22 test(const std::complex<T>& z, std::complex<T> x)
23 {
24     assert(proj(z) == x);
25 }
26 
27 template <class T>
28 void
29 test()
30 {
31     test(std::complex<T>(1, 2), std::complex<T>(1, 2));
32     test(std::complex<T>(-1, 2), std::complex<T>(-1, 2));
33     test(std::complex<T>(1, -2), std::complex<T>(1, -2));
34     test(std::complex<T>(-1, -2), std::complex<T>(-1, -2));
35 }
36 
37 void test_edges()
38 {
39     const unsigned N = sizeof(testcases) / sizeof(testcases[0]);
40     for (unsigned i = 0; i < N; ++i)
41     {
42         std::complex<double> r = proj(testcases[i]);
43         switch (classify(testcases[i]))
44         {
45         case zero:
46         case non_zero:
47             assert(r == testcases[i]);
48             assert(std::signbit(real(r)) == std::signbit(real(testcases[i])));
49             assert(std::signbit(imag(r)) == std::signbit(imag(testcases[i])));
50             break;
51         case inf:
52             assert(std::isinf(real(r)) && real(r) > 0);
53             assert(imag(r) == 0);
54             assert(std::signbit(imag(r)) == std::signbit(imag(testcases[i])));
55             break;
56         case NaN:
57         case non_zero_nan:
58             assert(classify(r) == classify(testcases[i]));
59             break;
60         }
61     }
62 }
63 
64 int main(int, char**)
65 {
66     test<float>();
67     test<double>();
68     test<long double>();
69     test_edges();
70 
71   return 0;
72 }
73