1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 // <complex>
11
12 // template<class T>
13 // complex<T>
14 // proj(const complex<T>& x);
15
16 #include <complex>
17 #include <cassert>
18
19 #include "../cases.h"
20
21 template <class T>
22 void
test(const std::complex<T> & z,std::complex<T> x)23 test(const std::complex<T>& z, std::complex<T> x)
24 {
25 assert(proj(z) == x);
26 }
27
28 template <class T>
29 void
test()30 test()
31 {
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 test(std::complex<T>(-1, -2), std::complex<T>(-1, -2));
36 }
37
test_edges()38 void test_edges()
39 {
40 const unsigned N = sizeof(x) / sizeof(x[0]);
41 for (unsigned i = 0; i < N; ++i)
42 {
43 std::complex<double> r = proj(x[i]);
44 switch (classify(x[i]))
45 {
46 case zero:
47 case non_zero:
48 assert(r == x[i]);
49 assert(std::signbit(real(r)) == std::signbit(real(x[i])));
50 assert(std::signbit(imag(r)) == std::signbit(imag(x[i])));
51 break;
52 case inf:
53 assert(std::isinf(real(r)) && real(r) > 0);
54 assert(imag(r) == 0);
55 assert(std::signbit(imag(r)) == std::signbit(imag(x[i])));
56 break;
57 case NaN:
58 case non_zero_nan:
59 assert(classify(r) == classify(x[i]));
60 break;
61 }
62 }
63 }
64
main()65 int main()
66 {
67 test<float>();
68 test<double>();
69 test<long double>();
70 test_edges();
71 }
72