Update

balloon/balloon_scope.h

@@ -0,0 +1,37 @@
+#ifndef __BALLOON_SCOPE_H__
+#define __BALLOON_SCOPE_H__
+
+class balloon_scope
+{
+	private:
+		std::list<var> scope;
+		var error_var;
+	public:
+		void set_clear()
+		{
+			scope.clear();
+			return;
+		}
+		bool search_var(std::string name)
+		{
+			for(std::list<var>::iterator i=scope.begin();i!=scope.end();++i)
+				if(i->get_name()==name)
+					return true;
+			return false;
+		}
+		void add_var(var t)
+		{
+			scope.push_back(t);
+			return;
+		}
+		var& get_var(std::string name)
+		{
+			for(std::list<var>::iterator i=scope.begin();i!=scope.end();++i)
+				if(i->get_name()==name)
+					return *i;
+			std::cout<<">>[Runtime-error] \'"<<name<<"\' was not declared in this scope."<<std::endl;
+			return error_var;
+		}
+};
+
+#endif