From 2729f71c327f8ef4ddbb620dc486e7334ba40119 Mon Sep 17 00:00:00 2001
From: Teddy <ted.sybil@gmail.com>
Date: Sat, 10 Aug 2013 23:42:42 +0800
Subject: more built-ins

---
 model.h | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'model.h')

diff --git a/model.h b/model.h
index ddbe2ee..0b7ac19 100644
--- a/model.h
+++ b/model.h
@@ -106,6 +106,7 @@ class EvalObj : public FrameObj {
         bool is_num_obj();
         /** Check if the object is a boolean */
         bool is_bool_obj();
+        bool is_str_obj();
         int get_otype();
         virtual void prepare(Pair *pc);
         /** Any EvalObj has its external representation */
@@ -329,8 +330,12 @@ class NumObj: public EvalObj {
         virtual NumObj *sub(NumObj *r) = 0;
         virtual NumObj *mul(NumObj *r) = 0;
         virtual NumObj *div(NumObj *r) = 0;
-        virtual bool lt(NumObj *r) = 0;
-        virtual bool gt(NumObj *r) = 0;
+        virtual NumObj *abs();
+
+        virtual bool lt(NumObj *r);
+        virtual bool gt(NumObj *r);
+        virtual bool le(NumObj *r);
+        virtual bool ge(NumObj *r);
         virtual bool eq(NumObj *r) = 0;
 };
 
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