37     const unsigned N = sizeof(testcases) / sizeof(testcases[0]);  in test_edges()
40         std::complex<double> r = tanh(testcases[i]);  in test_edges()
41         if (testcases[i].real() == 0 && testcases[i].imag() == 0)  in test_edges()
44             assert(std::signbit(r.real()) == std::signbit(testcases[i].real()));  in test_edges()
46             assert(std::signbit(r.imag()) == std::signbit(testcases[i].imag()));  in test_edges()
48         else if (std::isfinite(testcases[i].real()) && std::isinf(testcases[i].imag()))  in test_edges()
53         else if (std::isfinite(testcases[i].real()) && std::isnan(testcases[i].imag()))  in test_edges()
58         else if (std::isinf(testcases[i].real()) && std::isfinite(testcases[i].imag()))  in test_edges()
62             assert(std::signbit(r.imag()) == std::signbit(sin(2*testcases[i].imag())));  in test_edges()
64         else if (std::isinf(testcases[i].real()) && std::isinf(testcases[i].imag()))  in test_edges()
69         else if (std::isinf(testcases[i].real()) && std::isnan(testcases[i].imag()))  in test_edges()
74         else if (std::isnan(testcases[i].real()) && testcases[i].imag() == 0)  in test_edges()
78             assert(std::signbit(r.imag()) == std::signbit(testcases[i].imag()));  in test_edges()
80         else if (std::isnan(testcases[i].real()) && std::isfinite(testcases[i].imag()))  in test_edges()
85         else if (std::isnan(testcases[i].real()) && std::isnan(testcases[i].imag()))  in test_edges()