uintptr_max instead of -1/~0

src/ds/bits.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <stddef.h>
+#include <limits>
 
 #ifdef _MSC_VER
 #  include <immintrin.h>

src/mem/alloc.h

@@ -522,7 +522,7 @@ namespace snmalloc
       {
         if constexpr ((location == End) || (location == OnePastEnd))
           // We don't know the End, so return MAX_PTR
-          return (uintptr_t)~0;
+          return UINTPTR_MAX;
         else
           // We don't know the Start, so return MIN_PTR
           return 0;

src/mem/metaslab.h

@@ -19,7 +19,7 @@ namespace snmalloc
     }
   };
 
-  using SlabList = DLList<SlabLink, ~(uintptr_t)0>;
+  using SlabList = DLList<SlabLink, UINTPTR_MAX>;
 
   static_assert(
     sizeof(SlabLink) <= MIN_ALLOC_SIZE,