Resolve warnings

src/interpreter.c

@@ -133,10 +133,9 @@ value_t visit_binary(expr_t *expr)
 	}
 
 	// String/number comparisons
-	if (left.type == VAL_STRING && right.type == VAL_NUMBER ||
-			left.type == VAL_NUMBER && right.type == VAL_STRING ) {
+	if ((left.type == VAL_STRING && right.type == VAL_NUMBER) ||
+			(left.type == VAL_NUMBER && right.type == VAL_STRING)) {
 		runtime_error("Operands must be numbers.", expr->line);
-
 	}
 
 	runtime_error("Operands must be two numbers or two strings.", expr->line);

src/lexer.c

@@ -263,13 +263,7 @@ array_t *tokenize(char *filename)
 						int found = 0;
 						for (int i = 0; i < sizeof(reserved_keywords) / sizeof(reserved_keywords[0]); i++) {
 							if (strcmp(id, reserved_keywords[i].keyword) == 0) {
-								char upper_id[len + 1];
-								for (int i = 0; i < len; i++) {
-									upper_id[i] = toupper(id[i]);
-								}
-								upper_id[len] = 0;
 								token_add(tokens, token_gen(reserved_keywords[i].token_type, id, line));
-
 								found = 1;
 							}
 						}

src/parser.c

@@ -217,7 +217,7 @@ stmt_t var_declaration(void)
 {
 	token_t *name = consume(TOKEN_IDENTIFIER, "Expect variable name.");
 
-	expr_t *initializer;
+	expr_t *initializer = NULL;
 	if (check(TOKEN_EQUAL)) {
 		initializer = expression();
 	}