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 // pow(const T& x, const complex<T>& y); 15 16 #include <complex> 17 #include <cassert> 18 19 #include "../cases.h" 20 21 template <class T> 22 void 23 test(const T& a, const std::complex<T>& b, std::complex<T> x) 24 { 25 std::complex<T> c = pow(a, b); 26 is_about(real(c), real(x)); 27 assert(std::abs(imag(c)) < 1.e-6); 28 } 29 30 template <class T> 31 void 32 test() 33 { 34 test(T(2), std::complex<T>(2), std::complex<T>(4)); 35 } 36 37 void test_edges() 38 { 39 const double pi = std::atan2(+0., -0.); 40 const unsigned N = sizeof(x) / sizeof(x[0]); 41 for (unsigned i = 0; i < N; ++i) 42 { 43 for (unsigned j = 0; j < N; ++j) 44 { 45 std::complex<double> r = pow(real(x[i]), x[j]); 46 std::complex<double> z = exp(x[j] * log(std::complex<double>(real(x[i])))); 47 if (std::isnan(real(r))) 48 assert(std::isnan(real(z))); 49 else 50 { 51 assert(real(r) == real(z)); 52 } 53 if (std::isnan(imag(r))) 54 assert(std::isnan(imag(z))); 55 else 56 { 57 assert(imag(r) == imag(z)); 58 } 59 } 60 } 61 } 62 63 int main() 64 { 65 test<float>(); 66 test<double>(); 67 test<long double>(); 68 test_edges(); 69 } 70
