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70 lines
1.6 KiB
C++
70 lines
1.6 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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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// atan(const complex<T>& x);
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#include <complex>
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#include <cassert>
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#include "test_macros.h"
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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>& c, std::complex<T> x)
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{
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assert(atan(c) == 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>(0, 0), std::complex<T>(0, 0));
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}
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void test_edges()
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{
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const unsigned N = sizeof(testcases) / sizeof(testcases[0]);
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for (unsigned i = 0; i < N; ++i)
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{
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std::complex<double> r = atan(testcases[i]);
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std::complex<double> t1(-imag(testcases[i]), real(testcases[i]));
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std::complex<double> t2 = atanh(t1);
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std::complex<double> z(imag(t2), -real(t2));
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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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int main(int, char**)
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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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return 0;
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}
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