Started implementing Lexer errors

Common/FileRead.h

@@ -6,7 +6,7 @@
 namespace LXC::Util
 {
 	// Error returned when Util::ReadFile runs into errors //
-	struct FileReadError
+	struct FileReadError final
 	{
 		// Different reasons why the error can occur //
 		enum Reason
@@ -26,7 +26,7 @@ namespace LXC::Util
 		const Reason reason;
 
 		// Turns the error into a c-string //
-		inline static const char* const ReasonStr(const Reason& reason)
+		inline static const char* const ReasonStr(Reason reason)
 		{
 			static const char* reasons[] =
 			{