Add basic type checking

Squashed commit of WIP-type_check@5dadc4f5667ae69a709dd45c020780f2f424d67e

1 files changed, 2 insertions, 0 deletions

diff --git a/tree.h b/tree.h
index 0d94f6d..94ccb7d 100644
--- a/tree.h
+++ b/tree.h
@@ -12,6 +12,7 @@ typedef struct parse_tree {
 			      MULOP: MUL DIV
 		*/
 	} attr;
+	int ret_type;
 	struct parse_tree *l, *r;
 } ptree;
 
@@ -25,5 +26,6 @@ ptree* mkrnum(float);
 ptree* mkop(int, int, ptree*, ptree*);
 
 void update_type_info(ptree*, int);
+void set_ret_type(ptree*);
 
 #endif