From 5be1cd70929916d7710a69de3f8df5a2c01b1446 Mon Sep 17 00:00:00 2001
From: Yuichi Nishiwaki <yuichi.nishiwaki@gmail.com>
Date: Wed, 30 Oct 2013 12:16:45 +0900
Subject: [PATCH] add some comments in codegen_scopes' members

---
 src/codegen.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/codegen.c b/src/codegen.c
index 0a249c1b..71ae73ce 100644
--- a/src/codegen.c
+++ b/src/codegen.c
@@ -11,10 +11,11 @@
 typedef struct codegen_scope {
   struct codegen_scope *up;
 
-  /* local variables are 1-indexed */
+  /* local variables are 1-indexed, 0 is reserved for the callee */
   struct xhash *local_tbl;
   /* does not count rest argument variable */
   size_t argc;
+  /* dirty flags: if local var i is captured, then cv_tbl[i] == 1 */
   int *cv_tbl;
   bool varg;
 } codegen_scope;