63e88f80
 Hu Chunming
提交三方库
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// (C) Copyright Matt Borland 2021.
// Use, modification and distribution are subject to the
// Boost Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_MATH_CCMATH_ISINF
#define BOOST_MATH_CCMATH_ISINF
#include <cmath>
#include <limits>
#include <type_traits>
#include <boost/math/tools/is_constant_evaluated.hpp>
namespace boost::math::ccmath {
template <typename T>
inline constexpr bool isinf(T x)
{
if(BOOST_MATH_IS_CONSTANT_EVALUATED(x))
{
return x == std::numeric_limits<T>::infinity() || -x == std::numeric_limits<T>::infinity();
}
else
{
using std::isinf;
if constexpr (!std::is_integral_v<T>)
{
return isinf(x);
}
else
{
return isinf(static_cast<double>(x));
}
}
}
}
#endif // BOOST_MATH_CCMATH_ISINF
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