Avoid warnings in msvc with new preprocessor

Author: pps83

include/intx/intx.hpp

@@ -1608,16 +1608,19 @@ constexpr uint256 mulmod(const uint256& x, const uint256& y, const uint256& mod)
     return udivrem(umul(x, y), mod).rem;
 }
 
+#define INTX_JOIN2(X, Y) X##Y
+#define INTX_JOIN1(X, Y) INTX_JOIN2(X, Y)
+#define INTX_LITERAL(N) INTX_JOIN1("", INTX_JOIN1(_u, N))
 /// Define type alias uintN = uint<N> and the matching literal ""_uN.
 /// The literal operators are defined in the intx::literals namespace.
-#define DEFINE_ALIAS_AND_LITERAL(N)                  \
-    using uint##N = uint<N>;                         \
-    namespace literals                               \
-    {                                                \
-    consteval uint##N operator""_u##N(const char* s) \
-    {                                                \
-        return from_string<uint##N>(s);              \
-    }                                                \
+#define DEFINE_ALIAS_AND_LITERAL(N)                           \
+    using uint##N = uint<N>;                                  \
+    namespace literals                                        \
+    {                                                         \
+    consteval uint##N operator INTX_LITERAL(N)(const char* s) \
+    {                                                         \
+        return from_string<uint##N>(s);                       \
+    }                                                         \
     }
 DEFINE_ALIAS_AND_LITERAL(128);
 DEFINE_ALIAS_AND_LITERAL(192);
@@ -1627,6 +1630,9 @@ DEFINE_ALIAS_AND_LITERAL(384);
 DEFINE_ALIAS_AND_LITERAL(448);
 DEFINE_ALIAS_AND_LITERAL(512);
 #undef DEFINE_ALIAS_AND_LITERAL
+#undef INTX_JOIN2
+#undef INTX_JOIN1
+#undef INTX_LITERAL
 
 using namespace literals;