abs.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>
// T
// abs(const complex<T>& x);
#include <complex>
#include <cassert>
#include "test_macros.h"
#include "../cases.h"
template <class T>
void
test()
{
std::complex<T> z(3, 4);
assert(abs(z) == 5);
}
void test_edges()
{
const unsigned N = sizeof(testcases) / sizeof(testcases[0]);
for (unsigned i = 0; i < N; ++i)
{
double r = abs(testcases[i]);
switch (classify(testcases[i]))
{
case zero:
assert(r == 0);
assert(!std::signbit(r));
break;
case non_zero:
assert(std::isfinite(r) && r > 0);
break;
case inf:
assert(std::isinf(r) && r > 0);
break;
case NaN:
assert(std::isnan(r));
break;
case non_zero_nan:
assert(std::isnan(r));
break;
}
}
}
int main(int, char**)
{
test<float>();
test<double>();
test<long double>();
test_edges();
return 0;
}