From cfb7f91f0153250b009a68b076ef4d1e6f12c4eb Mon Sep 17 00:00:00 2001
From: Teddy <ted.sybil@gmail.com>
Date: Tue, 13 Aug 2013 19:42:19 +0800
Subject: add the middle class: `Container` to help resolve circular issues

---
 types.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'types.cpp')

diff --git a/types.cpp b/types.cpp
index 449da5e..7988c59 100644
--- a/types.cpp
+++ b/types.cpp
@@ -15,8 +15,8 @@ const int PREC = 16;
 extern EmptyList *empty_list;
 extern UnspecObj *unspec_obj;
 
-Pair::Pair(EvalObj *_car, EvalObj *_cdr) : EvalObj(CLS_PAIR_OBJ),
-    car(_car), cdr(_cdr), next(NULL) {
+Pair::Pair(EvalObj *_car, EvalObj *_cdr) : 
+Container(CLS_PAIR_OBJ), car(_car), cdr(_cdr), next(NULL) {
 
     gc.attach(car);
     gc.attach(cdr);
-- 
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