Use numeric_limits<T>::is_signed to support Boost.MP types

mborland · mborland · commit 94201a88ba29 · 2022-10-29T16:25:39.000-07:00
diff --git a/include/boost/math/ccmath/isinf.hpp b/include/boost/math/ccmath/isinf.hpp
@@ -18,7 +18,7 @@ constexpr bool isinf(T x) noexcept
 {
     if(BOOST_MATH_IS_CONSTANT_EVALUATED(x))
     {
-        if constexpr (std::is_signed_v<T>)
+        if constexpr (std::numeric_limits<T>::is_signed)
         {
             return x == std::numeric_limits<T>::infinity() || -x == std::numeric_limits<T>::infinity();
         }

Original file line number	Diff line number	Diff line change
`@@ -18,7 +18,7 @@ constexpr bool isinf(T x) noexcept`
`18`	`18`	`{`
`19`	`19`	`if(BOOST_MATH_IS_CONSTANT_EVALUATED(x))`
`20`	`20`	`{`
`21`		`- if constexpr (std::is_signed_v<T>)`
	`21`	`+ if constexpr (std::numeric_limits<T>::is_signed)`
`22`	`22`	`{`
`23`	`23`	`return x == std::numeric_limits<T>::infinity() \|\| -x == std::numeric_limits<T>::infinity();`
`24`	`24`	`}`