cos.pass.cpp
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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <complex>
// template<class T>
// complex<T>
// cos(const complex<T>& x);
#include <complex>
#include <cassert>
#include "test_macros.h"
#include "../cases.h"
template <class T>
void
test(const std::complex<T>& c, std::complex<T> x)
{
assert(cos(c) == x);
}
template <class T>
void
test()
{
test(std::complex<T>(0, 0), std::complex<T>(1, 0));
}
void test_edges()
{
const unsigned N = sizeof(testcases) / sizeof(testcases[0]);
for (unsigned i = 0; i < N; ++i)
{
std::complex<double> r = cos(testcases[i]);
std::complex<double> t1(-imag(testcases[i]), real(testcases[i]));
std::complex<double> z = cosh(t1);
if (std::isnan(real(r)))
assert(std::isnan(real(z)));
else
{
assert(real(r) == real(z));
assert(std::signbit(real(r)) == std::signbit(real(z)));
}
if (std::isnan(imag(r)))
assert(std::isnan(imag(z)));
else
{
assert(imag(r) == imag(z));
assert(std::signbit(imag(r)) == std::signbit(imag(z)));
}
}
}
int main(int, char**)
{
test<float>();
test<double>();
test<long double>();
test_edges();
return 0;
}