update

version2.0/nasal_gc.h

@@ -12,17 +12,24 @@ struct gc_unit
 	gc_unit()
 	{
 		collected=true;
-		//elem=0;
+		elem.set_clear();
 		refcnt=0;
 		return;
 	}
 	gc_unit(const gc_unit& tmp)
 	{
 		collected=tmp.collected;
-		//elem=tmp.elem;
+		elem     =tmp.elem;
 		refcnt   =tmp.refcnt;
 		return;
 	}
+	void set_clear()
+	{
+		collected=true;
+		elem.set_clear();
+		refcnt=0;
+		return;
+	}
 };
 
 class gc_manager
@@ -61,7 +68,7 @@ class gc_manager
 			for(int i=0;i<memory_size;++i)
 				if((memory[i].refcnt<=0) && (!memory[i].collected))
 				{
-					memory[i].collected=true;
+					memory[i].set_clear();
 					free_space.push_back(i);
 					std::cout<<">> [Gc] collected ";
 					prt_hex(i);

version2.0/nasal_runtime.h

@@ -5,6 +5,7 @@ class nasal_runtime
 {
     private:
         sym_hash_map global;
+        // local hash_map will be used when running
     public:
         nasal_runtime()
         {
@@ -18,14 +19,16 @@ class nasal_runtime
             nasal_gc.gc_init();
             return;
         }
-        void before_running_init()
+        void func_proc()
         {
-            global.set_clear();
-            nasal_gc.gc_init();
             return;
         }
         void main_proc(abstract_syntax_tree& root)
         {
+            // init
+            global.set_clear();
+            nasal_gc.gc_init();
+
             return;
         }
 };

version2.0/nasal_scalar.h

@@ -19,6 +19,22 @@ class nasal_function
 			function_root.set_clear();
 			return;
 		}
+		void set_clear()
+		{
+			local_scope.clear();
+			function_root.set_clear();
+			return;
+		}
+		nasal_function& operator=(const nasal_function& tmp)
+		{
+			local_scope=tmp.local_scope;
+			function_root=tmp.function_root;
+			return *this;
+		}
+		std::map<std::string,int>& get_local_scope()
+		{
+			return local_scope;
+		}
 };
 
 class nasal_scalar
@@ -47,6 +63,7 @@ class nasal_scalar
 			var_number=tmp.var_number;
 			var_array =tmp.var_array;
 			var_hash  =tmp.var_hash;
+			var_func  =tmp.var_func;
 			return;
 		}
 		nasal_scalar& operator=(const nasal_scalar& tmp)
@@ -56,6 +73,7 @@ class nasal_scalar
 			var_number=tmp.var_number;
 			var_array =tmp.var_array;
 			var_hash  =tmp.var_hash;
+			var_func  =tmp.var_func;
 			return *this;
 		}
 		void set_clear()
@@ -65,6 +83,7 @@ class nasal_scalar
 			var_number=0;
 			var_array.clear();
 			var_hash.clear();
+			var_func.set_clear();
 			return;
 		}
 		void set_type(const int tmp_type)