27 int type_safety(symbol_c *tree_root){

    27 int type_safety(symbol_c *tree_root){

    28 	visit_expression_type_c visit_expression_type(tree_root);

    28 	visit_expression_type_c visit_expression_type(tree_root);

    29 

    29 

    30 	(*tree_root).accept(visit_expression_type);

    30 	(*tree_root).accept(visit_expression_type);

    31 

    31 

    32 	return 0;

    35 	return 0;

    33 }

    36 }

    34 

    37 

    35 int stage3(symbol_c *tree_root){

    38 int stage3(symbol_c *tree_root){

    36 	return type_safety(tree_root);

    39 	return type_safety(tree_root);