72 lines
1.7 KiB
C++
72 lines
1.7 KiB
C++
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//===----------------------------------------------------------------------===//
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//
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <complex>
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// template<class T>
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// complex<T>
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// pow(const complex<T>& x, const complex<T>& y);
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#include <complex>
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#include <cassert>
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#include "../cases.h"
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template <class T>
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void
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test(const std::complex<T>& a, const std::complex<T>& b, std::complex<T> x)
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{
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std::complex<T> c = pow(a, b);
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is_about(real(c), real(x));
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is_about(imag(c), imag(x));
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}
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template <class T>
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void
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test()
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{
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test(std::complex<T>(2, 3), std::complex<T>(2, 0), std::complex<T>(-5, 12));
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}
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void test_edges()
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{
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const double pi = std::atan2(+0., -0.);
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const unsigned N = sizeof(x) / sizeof(x[0]);
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for (unsigned i = 0; i < N; ++i)
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{
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for (unsigned j = 0; j < N; ++j)
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{
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std::complex<double> r = pow(x[i], x[j]);
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std::complex<double> z = exp(x[j] * log(x[i]));
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if (std::isnan(real(r)))
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assert(std::isnan(real(z)));
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else
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{
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assert(real(r) == real(z));
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assert(std::signbit(real(r)) == std::signbit(real(z)));
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}
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if (std::isnan(imag(r)))
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assert(std::isnan(imag(z)));
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else
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{
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assert(imag(r) == imag(z));
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assert(std::signbit(imag(r)) == std::signbit(imag(z)));
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}
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}
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}
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}
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int main()
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{
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test<float>();
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test<double>();
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test<long double>();
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test_edges();
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}
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