From 146c9247eddf2b601a7e9e71c472912f5a7faf61 Mon Sep 17 00:00:00 2001
From: Teddy <ted.sybil@gmail.com>
Date: Fri, 9 Aug 2013 19:34:13 +0800
Subject: str_to_lower should only apply to Symbols

---
 parser.cpp | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

(limited to 'parser.cpp')

diff --git a/parser.cpp b/parser.cpp
index 7483847..a00f3f4 100644
--- a/parser.cpp
+++ b/parser.cpp
@@ -43,7 +43,7 @@ void Tokenizor::set_stream(FILE *_stream) {
     } while (0)
 #define TOP (*(buff_ptr - 1))
 
-void str_to_lower(string &str) {
+string str_to_lower(string str) {
     size_t len = str.length();
     for (size_t i = 0; i < len; i++)
         if ('A' <= str[i] && str[i] <= 'Z')
@@ -112,11 +112,7 @@ bool Tokenizor::get_token(string &ret) {
                 else
                     *buff_ptr++ = ch;
             }
-            if (flag)
-            {
-                str_to_lower(ret);
-                return true;
-            }
+            if (flag) return true;
         }
     }
     if (buff_ptr != buff) POP;
@@ -135,7 +131,7 @@ EvalObj *ASTGenerator::to_obj(const string &str) {
     if ((res = RealNumObj::from_string(str))) return res;
     if ((res = CompNumObj::from_string(str))) return res;
     if ((res = StrObj::from_string(str))) return res;
-    return new SymObj(str); // otherwise we assume it a symbol
+    return new SymObj(str_to_lower(str)); // otherwise we assume it a symbol
 }
 
 #define TO_EVAL(ptr) \
-- 
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