Further refactoring done. The Parser runs without crashing, however it's output is still to be checked and verified.

token.c

@@ -48,4 +48,12 @@ const char* GetLexemeMapping(TokenType type) {
     }
 
     return NULL;
+}
+
+void FreeToken(Token* token) {
+    if (!token) return;
+
+    if (token->type == String || token->type == Number || token->type == Identifier) free((void *) token->lexeme);
+
+    free(token);
 }