update boost

linx64/include/boost/math/ccmath/isinf.hpp

@@ -0,0 +1,56 @@
+//  (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>
+#include <boost/math/special_functions/fpclassify.hpp>
+
+#include <boost/math/tools/is_standalone.hpp>
+#ifndef BOOST_MATH_STANDALONE
+#include <boost/config.hpp>
+#ifdef BOOST_NO_CXX17_IF_CONSTEXPR
+#error "The header <boost/math/norms.hpp> can only be used in C++17 and later."
+#endif
+#endif
+
+namespace boost::math::ccmath {
+
+template <typename T>
+constexpr bool isinf BOOST_PREVENT_MACRO_SUBSTITUTION(T x) noexcept
+{
+    if(BOOST_MATH_IS_CONSTANT_EVALUATED(x))
+    {
+        if constexpr (std::numeric_limits<T>::is_signed)
+        {
+            return x == std::numeric_limits<T>::infinity() || -x == std::numeric_limits<T>::infinity();
+        }
+        else
+        {
+            return x == std::numeric_limits<T>::infinity();
+        }
+    }
+    else
+    {
+        using boost::math::isinf;
+        
+        if constexpr (!std::is_integral_v<T>)
+        {
+            return (isinf)(x);
+        }
+        else
+        {
+            return (isinf)(static_cast<double>(x));
+        }
+    }
+}
+
+}
+
+#endif // BOOST_MATH_CCMATH_ISINF