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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <complex>
// template<Arithmetic T>
// T
// real(const T& x);
#include <complex>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
#include "../cases.h"
template <class T, int x>
void
test(typename std::enable_if<std::is_integral<T>::value>::type* = 0)
{
static_assert((std::is_same<decltype(std::real(T(x))), double>::value), "");
assert(std::real(x) == x);
#if TEST_STD_VER > 11
constexpr T val {x};
static_assert(std::real(val) == val, "");
constexpr std::complex<T> t{val, val};
static_assert(t.real() == x, "" );
#endif
}
template <class T, int x>
void
test(typename std::enable_if<!std::is_integral<T>::value>::type* = 0)
{
static_assert((std::is_same<decltype(std::real(T(x))), T>::value), "");
assert(std::real(x) == x);
#if TEST_STD_VER > 11
constexpr T val {x};
static_assert(std::real(val) == val, "");
constexpr std::complex<T> t{val, val};
static_assert(t.real() == x, "" );
#endif
}
template <class T>
void
test()
{
test<T, 0>();
test<T, 1>();
test<T, 10>();
}
int main()
{
test<float>();
test<double>();
test<long double>();
test<int>();
test<unsigned>();
test<long long>();
}
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