diff -r bc90dd4bbf4f -r f86d5d6bb04e util/symtable.hh
--- a/util/symtable.hh	Fri Dec 26 10:09:27 2014 +0000
+++ b/util/symtable.hh	Fri Dec 26 12:43:13 2014 +0000
@@ -81,7 +81,7 @@
   public:
     symtable_c(void);
 
-    void reset(void); /* clear all entries... */
+    void clear(void); /* clear all entries... */
 
     void push(void); /* create new inner scope */
     int  pop(void);  /* clear most inner scope */
@@ -91,10 +91,24 @@
     void insert(const char *identifier_str, value_t value); // insert a new (string,value) pair. Give an error if string already in map associated to different value!
     void insert(const symbol_c *symbol, value_t value);     // insert a new (string,value) pair. Give an error if string already in map associated to different value!
 
+    value_t operator[](const       char *identifier_str);
+    value_t operator[](const std::string identifier_str);
+ // value_t operator[](const   symbol_c *identifier    ); // not yet implemented
+   
+    /* Since symtable_c does not allow duplicates in each level, count() will return
+     *  - 0 : if not found in any level
+     *  - n : number of level containing that entry (max is current number of levels!)
+     */
+    int count(const       char *identifier_str);
+    int count(const std::string identifier_str);
+ // int count(const   symbol_c *identifier    ); // not yet implemented
+    
     /* Search for an entry. Will return end() if not found */
+    iterator               begin(void);
     iterator               end  (void);
-    iterator               find (const char     *identifier_str);
-    iterator               find (const symbol_c *symbol        );
+    iterator               find (const char       *identifier_str);
+    iterator               find (const std::string identifier_str);
+    iterator               find (const symbol_c   *symbol        );
 
 
   /* iterators ... */