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 //   T
13 //   norm(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()
23 {
24     std::complex<T> z(3, 4);
25     assert(norm(z) == 25);
26 }
27 
28 void test_edges()
29 {
30     const unsigned N = sizeof(testcases) / sizeof(testcases[0]);
31     for (unsigned i = 0; i < N; ++i)
32     {
33         double r = norm(testcases[i]);
34         switch (classify(testcases[i]))
35         {
36         case zero:
37             assert(r == 0);
38             assert(!std::signbit(r));
39             break;
40         case non_zero:
41             assert(std::isfinite(r) && r > 0);
42             break;
43         case inf:
44             assert(std::isinf(r) && r > 0);
45             break;
46         case NaN:
47             assert(std::isnan(r));
48             break;
49         case non_zero_nan:
50             assert(std::isnan(r));
51             break;
52         }
53     }
54 }
55 
56 int main(int, char**)
57 {
58     test<float>();
59     test<double>();
60     test<long double>();
61     test_edges();
62 
63   return 0;
64 }
65