improve type system

1 files changed, 2 insertions, 2 deletions

diff --git a/ast.h b/ast.h
index a6d0388..e77c779 100644
--- a/ast.h
+++ b/ast.h
@@ -11,7 +11,7 @@ struct expr_list_node {
     struct expr_node* expr;
     struct expr_list_node* next;
 
-    struct type* resolved_type;
+    const struct type* resolved_type;
 };
 
 struct int_lit_node {
@@ -104,7 +104,7 @@ struct expr_node {
         struct paren_node paren;
     } inner;
 
-    struct type* resolved_type;
+    const struct type* resolved_type;
 };
 
 struct group_node {