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File: isinf.hpp
// (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