From 548118a7354f48558e402f4c843471792dcb7ec8 Mon Sep 17 00:00:00 2001
From: Matt Borland <matt@mattborland.com>
Date: Thu, 27 Oct 2022 20:44:43 -0700
Subject: [PATCH 1/3] Fix warning C4146: unary minus operator applied to
 unsigned type

---
 include/boost/math/ccmath/isinf.hpp | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/include/boost/math/ccmath/isinf.hpp b/include/boost/math/ccmath/isinf.hpp
index 15787c25bc..a07b42aabd 100644
--- a/include/boost/math/ccmath/isinf.hpp
+++ b/include/boost/math/ccmath/isinf.hpp
@@ -14,11 +14,18 @@
 namespace boost::math::ccmath {
 
 template <typename T>
-inline constexpr bool isinf(T x)
+constexpr bool isinf(T x) noexcept
 {
     if(BOOST_MATH_IS_CONSTANT_EVALUATED(x))
     {
-        return x == std::numeric_limits<T>::infinity() || -x == std::numeric_limits<T>::infinity();
+        if constexpr (std::is_signed_v<T>)
+        {
+            return x == std::numeric_limits<T>::infinity() || -x == std::numeric_limits<T>::infinity();
+        }
+        else
+        {
+            return x == std::numeric_limits<T>::infinity();
+        }
     }
     else
     {

From 2acd1d62bfa2af2da00d111ffd48fa2b1db6ace1 Mon Sep 17 00:00:00 2001
From: Matt Borland <matt@mattborland.com>
Date: Thu, 27 Oct 2022 20:47:09 -0700
Subject: [PATCH 2/3] Fix warning C4244: 'return': conversion from 'int' to 'T'

---
 include/boost/math/ccmath/logb.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/math/ccmath/logb.hpp b/include/boost/math/ccmath/logb.hpp
index 1b0c165bcc..4df96dd443 100644
--- a/include/boost/math/ccmath/logb.hpp
+++ b/include/boost/math/ccmath/logb.hpp
@@ -29,7 +29,7 @@ inline constexpr T logb_impl(T arg) noexcept
     int exp = 0;
     boost::math::ccmath::frexp(arg, &exp);
 
-    return exp - 1;
+    return static_cast<T>(exp - 1);
 }
 
 } // Namespace detail

From 94201a88ba29fc34bec6498926f0db91d190e458 Mon Sep 17 00:00:00 2001
From: Matt Borland <matt@mattborland.com>
Date: Fri, 28 Oct 2022 07:55:34 -0700
Subject: [PATCH 3/3] Use numeric_limits<T>::is_signed to support Boost.MP
 types

---
 include/boost/math/ccmath/isinf.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/math/ccmath/isinf.hpp b/include/boost/math/ccmath/isinf.hpp
index a07b42aabd..9df492a18a 100644
--- 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();
         }