Handle THROW macro in its own scope.

src/Exception.hpp

@@ -152,9 +152,11 @@ static consteval const char* file_name(const char* path) {
 }
 
 #define THROW(message)                                                                                                 \
-    std::stringstream ___ss;                                                                                           \
-    ___ss << "[" << file_name(__FILE__) << ":" << __LINE__ << "] " << message;                                         \
-    throw ArbUt::Exception(___ss.str());
+    {                                                                                                                  \
+        std::stringstream ___ss;                                                                                       \
+        ___ss << "[" << file_name(__FILE__) << ":" << __LINE__ << "] " << message;                                     \
+        throw ArbUt::Exception(___ss.str());                                                                           \
+    }
 
 #define NOT_REACHABLE THROW("Not reachable");
 #define NOT_IMPLEMENTED THROW("Not implemented");