From 6aef19ce7a322dd27ffc0ad22a7df746e93e2555 Mon Sep 17 00:00:00 2001
From: Valk Richard Li <48872266+ValKmjolnir@users.noreply.github.com>
Date: Tue, 12 Nov 2019 23:23:42 +0800
Subject: [PATCH] update

---
 balloon/abstract_syntax_tree.cpp | 439 +++++++++++++++++++++++++++++--
 balloon/abstract_syntax_tree.h   |   8 +-
 balloon/balloon.h                |   2 +
 balloon/balloon_parse.h          |   2 +-
 balloon/balloon_type.h           |   6 +-
 balloon/balloon_var.h            |  42 ++-
 balloon/var.txt                  |   7 +-
 7 files changed, 469 insertions(+), 37 deletions(-)

diff --git a/balloon/abstract_syntax_tree.cpp b/balloon/abstract_syntax_tree.cpp
index bf79a5a..088bbdf 100644
--- a/balloon/abstract_syntax_tree.cpp
+++ b/balloon/abstract_syntax_tree.cpp
@@ -1,63 +1,398 @@
 #ifndef __ABSTRACT_SYNTAX_TREE_CPP__
 #define __ABSTRACT_SYNTAX_TREE_CPP__
 #include "abstract_syntax_tree.h"
-int exit_type=0;
 
-var abstract_syntax_tree::condition()
+
+int exit_type=0;
+std::stack<var> ret_stack;// for function ret use
+
+var abstract_syntax_tree::calculation()
 {
-	var cond;
-	cond.set_number(0);
-	if(this->type==__cmp_equal)
+	var temp;
+	temp.set_type(__null_type);
+	if(this->type==__number)
 	{
-		
+		temp.set_type(__var_number);
+		temp.set_number(number);
+		return temp;
+	}
+	else if(this->type==__string)
+	{
+		temp.set_type(__var_string);
+		temp.set_string(str);
+		return temp;
+	}
+	else if(this->type==__id)
+	{
+		temp=this->call_identifier();
+		return temp;
+	}
+	if(this->type==__nor_operator)
+	{
+		temp.set_type(__var_number);
+		temp=children.front().calculation();
+		if(temp.get_type()!=__var_number)
+		{
+			exit_type=__error_value_type;
+			std::cout<<">>[Runtime-error] must use a number to use \'!\' but use \'";
+			print_scalar(temp.get_type());
+			std::cout<<"\'."<<std::endl;
+		}
+		else
+		{
+			if(temp.get_number())
+				temp.set_number(0);
+			else
+				temp.set_number(1);
+		}
+		return temp;
+	}
+	else if(this->type==__add_operator)
+	{
+		temp.set_type(__var_number);
+		var left_child=children.front().calculation();
+		var right_child=children.back().calculation();
+		if(left_child.get_type()==__var_number && right_child.get_type()==__var_number)
+			temp.set_number(left_child.get_number()+right_child.get_number());
+		else
+		{
+			exit_type=__error_value_type;
+			std::cout<<">>[Runtime-error] must use a number to use \'+\' but use \'";
+			print_scalar(left_child.get_type());
+			std::cout<<"\' and \'";
+			print_scalar(right_child.get_type());
+			std::cout<<"\'."<<std::endl;
+		}
+	}
+	else if(this->type==__sub_operator)
+	{
+		temp.set_type(__var_number);
+		std::list<abstract_syntax_tree>::iterator i=children.begin();
+		++i;
+		if(i==children.end())
+		{
+			temp=children.front().calculation();
+			if(temp.get_type()==__var_number)
+				temp.set_number(temp.get_number()*(-1));
+			else
+			{
+				exit_type=__error_value_type;
+				std::cout<<">>[Runtime-error] must use a number to use \'-\' but use \'";
+				print_scalar(temp.get_type());
+				std::cout<<"\'."<<std::endl;
+			}
+		}
+		else
+		{
+			var left_child=children.front().calculation();
+			var right_child=children.back().calculation();
+			if(left_child.get_type()==__var_number && right_child.get_type()==__var_number)
+				temp.set_number(left_child.get_number()-right_child.get_number());
+			else
+			{
+				exit_type=__error_value_type;
+				std::cout<<">>[Runtime-error] must use a number to use \'-\' but use \'";
+				print_scalar(left_child.get_type());
+				std::cout<<"\' and \'";
+				print_scalar(right_child.get_type());
+				std::cout<<"\'."<<std::endl;
+			}
+		}
+	}
+	else if(this->type==__mul_operator)
+	{
+		temp.set_type(__var_number);
+		var left_child=children.front().calculation();
+		var right_child=children.back().calculation();
+		if(left_child.get_type()==__var_number && right_child.get_type()==__var_number)
+			temp.set_number(left_child.get_number()*right_child.get_number());
+		else
+		{
+			exit_type=__error_value_type;
+			std::cout<<">>[Runtime-error] must use a number to use \'*\' but use \'";
+			print_scalar(left_child.get_type());
+			std::cout<<"\' and \'";
+			print_scalar(right_child.get_type());
+			std::cout<<"\'."<<std::endl;
+		}
+	}
+	else if(this->type==__div_operator)
+	{
+		temp.set_type(__var_number);
+		var left_child=children.front().calculation();
+		var right_child=children.back().calculation();
+		if(left_child.get_type()==__var_number && right_child.get_type()==__var_number)
+		{
+			temp.set_number(left_child.get_number()/right_child.get_number());
+			if(std::isnan(temp.get_number()) || std::isinf(temp.get_number()))
+			{
+				exit_type=__sigfpe_arithmetic_exception;
+				std::cout<<">>[Runtime-error] get number \'NaN\' or \'Inf\'."<<std::endl;
+			}
+		}
+		else
+		{
+			exit_type=__error_value_type;
+			std::cout<<">>[Runtime-error] must use a number to use \'/\' but use \'";
+			print_scalar(left_child.get_type());
+			std::cout<<"\' and \'";
+			print_scalar(right_child.get_type());
+			std::cout<<"\'."<<std::endl;
+		}
+	}
+	else if(this->type==__link_operator)
+	{
+		temp.set_type(__var_string);
+		var left_child=children.front().calculation();
+		var right_child=children.back().calculation();
+		if(left_child.get_type()==__var_string && right_child.get_type()==__var_string)
+			temp.set_string(left_child.get_string()+right_child.get_string());
+		else
+		{
+			exit_type=__error_value_type;
+			std::cout<<">>[Runtime-error] must use a string to use \'~\' but use \'";
+			print_scalar(left_child.get_type());
+			std::cout<<"\' and \'";
+			print_scalar(right_child.get_type());
+			std::cout<<"\'."<<std::endl;
+		}
+	}
+	else if(this->type==__cmp_equal)
+	{
+		temp.set_type(__var_number);
+		var left_child=children.front().calculation();
+		var right_child=children.back().calculation();
+		if(left_child.get_type()==right_child.get_type())
+		{
+			if(left_child.get_type()==__var_number)
+				temp.set_number((double)(left_child.get_number()==right_child.get_number()));
+			else if(left_child.get_type()==__var_string)
+				temp.set_number((double)(left_child.get_string()==right_child.get_string()));
+			else
+			{
+				exit_type=__error_value_type;
+				std::cout<<">>[Runtime-error] must use number or string to use \'==\' but use \'";
+				print_scalar(left_child.get_type());
+				std::cout<<"\'."<<std::endl;
+			}
+		}
+		else
+		{
+			exit_type=__error_value_type;
+			std::cout<<">>[Runtime-error] must use same type to use \'==\' but use \'";
+			print_scalar(left_child.get_type());
+			std::cout<<"\' and \'";
+			print_scalar(right_child.get_type());
+			std::cout<<"\'."<<std::endl;
+		}
 	}
 	else if(this->type==__cmp_not_equal)
 	{
-		
+		temp.set_type(__var_number);
+		var left_child=children.front().calculation();
+		var right_child=children.back().calculation();
+		if(left_child.get_type()==right_child.get_type())
+		{
+			if(left_child.get_type()==__var_number)
+				temp.set_number((double)(left_child.get_number()!=right_child.get_number()));
+			else if(left_child.get_type()==__var_string)
+				temp.set_number((double)(left_child.get_string()!=right_child.get_string()));
+			else
+			{
+				exit_type=__error_value_type;
+				std::cout<<">>[Runtime-error] must use number or string to use \'!=\' but use \'";
+				print_scalar(left_child.get_type());
+				std::cout<<"\'."<<std::endl;
+			}
+		}
+		else
+		{
+			exit_type=__error_value_type;
+			std::cout<<">>[Runtime-error] must use same type to use \'!=\' but use \'";
+			print_scalar(left_child.get_type());
+			std::cout<<"\' and \'";
+			print_scalar(right_child.get_type());
+			std::cout<<"\'."<<std::endl;
+		}
 	}
 	else if(this->type==__cmp_less)
 	{
-		
+		temp.set_type(__var_number);
+		var left_child=children.front().calculation();
+		var right_child=children.back().calculation();
+		if(left_child.get_type()==right_child.get_type())
+		{
+			if(left_child.get_type()==__var_number)
+				temp.set_number((double)(left_child.get_number()<right_child.get_number()));
+			else if(left_child.get_type()==__var_string)
+				temp.set_number((double)(left_child.get_string()<right_child.get_string()));
+			else
+			{
+				exit_type=__error_value_type;
+				std::cout<<">>[Runtime-error] must use number or string to use \'<\' but use \'";
+				print_scalar(left_child.get_type());
+				std::cout<<"\'."<<std::endl;
+			}
+		}
+		else
+		{
+			exit_type=__error_value_type;
+			std::cout<<">>[Runtime-error] must use same type to use \'<\' but use \'";
+			print_scalar(left_child.get_type());
+			std::cout<<"\' and \'";
+			print_scalar(right_child.get_type());
+			std::cout<<"\'."<<std::endl;
+		}
 	}
 	else if(this->type==__cmp_more)
 	{
-		
+		temp.set_type(__var_number);
+		var left_child=children.front().calculation();
+		var right_child=children.back().calculation();
+		if(left_child.get_type()==right_child.get_type())
+		{
+			if(left_child.get_type()==__var_number)
+				temp.set_number((double)(left_child.get_number()>right_child.get_number()));
+			else if(left_child.get_type()==__var_string)
+				temp.set_number((double)(left_child.get_string()>right_child.get_string()));
+			else
+			{
+				exit_type=__error_value_type;
+				std::cout<<">>[Runtime-error] must use number or string to use \'>\' but use \'";
+				print_scalar(left_child.get_type());
+				std::cout<<"\'."<<std::endl;
+			}
+		}
+		else
+		{
+			exit_type=__error_value_type;
+			std::cout<<">>[Runtime-error] must use same type to use \'>\' but use \'";
+			print_scalar(left_child.get_type());
+			std::cout<<"\' and \'";
+			print_scalar(right_child.get_type());
+			std::cout<<"\'."<<std::endl;
+		}
 	}
 	else if(this->type==__cmp_less_or_equal)
 	{
-		
+		temp.set_type(__var_number);
+		var left_child=children.front().calculation();
+		var right_child=children.back().calculation();
+		if(left_child.get_type()==right_child.get_type())
+		{
+			if(left_child.get_type()==__var_number)
+				temp.set_number((double)(left_child.get_number()<=right_child.get_number()));
+			else if(left_child.get_type()==__var_string)
+				temp.set_number((double)(left_child.get_string()<=right_child.get_string()));
+			else
+			{
+				exit_type=__error_value_type;
+				std::cout<<">>[Runtime-error] must use number or string to use \'<=\' but use \'";
+				print_scalar(left_child.get_type());
+				std::cout<<"\'."<<std::endl;
+			}
+		}
+		else
+		{
+			exit_type=__error_value_type;
+			std::cout<<">>[Runtime-error] must use same type to use \'<=\' but use \'";
+			print_scalar(left_child.get_type());
+			std::cout<<"\' and \'";
+			print_scalar(right_child.get_type());
+			std::cout<<"\'."<<std::endl;
+		}
 	}
 	else if(this->type==__cmp_more_or_equal)
 	{
-		
+		temp.set_type(__var_number);
+		var left_child=children.front().calculation();
+		var right_child=children.back().calculation();
+		if(left_child.get_type()==right_child.get_type())
+		{
+			if(left_child.get_type()==__var_number)
+				temp.set_number((double)(left_child.get_number()>=right_child.get_number()));
+			else if(left_child.get_type()==__var_string)
+				temp.set_number((double)(left_child.get_string()>=right_child.get_string()));
+			else
+			{
+				exit_type=__error_value_type;
+				std::cout<<">>[Runtime-error] must use number or string to use \'>=\' but use \'";
+				print_scalar(left_child.get_type());
+				std::cout<<"\'."<<std::endl;
+			}
+		}
+		else
+		{
+			exit_type=__error_value_type;
+			std::cout<<">>[Runtime-error] must use same type to use \'>=\' but use \'";
+			print_scalar(left_child.get_type());
+			std::cout<<"\' and \'";
+			print_scalar(right_child.get_type());
+			std::cout<<"\'."<<std::endl;
+		}
 	}
 	else if(this->type==__or_operator)
 	{
-		
+		temp.set_type(__var_number);
+		var left_child=children.front().calculation();
+		var right_child=children.back().calculation();
+		if(left_child.get_type()==__var_number && right_child.get_type()==__var_number)
+			temp.set_number((double)(left_child.get_number() || right_child.get_number()));
+		else
+		{
+			exit_type=__error_value_type;
+			std::cout<<">>[Runtime-error] must use same type to use \'or\' but use \'";
+			print_scalar(left_child.get_type());
+			std::cout<<"\' and \'";
+			print_scalar(right_child.get_type());
+			std::cout<<"\'."<<std::endl;
+		}
 	}
 	else if(this->type==__and_operator)
 	{
-		
+		temp.set_type(__var_number);
+		var left_child=children.front().calculation();
+		var right_child=children.back().calculation();
+		if(left_child.get_type()==__var_number && right_child.get_type()==__var_number)
+			temp.set_number((double)(left_child.get_number() && right_child.get_number()));
+		else
+		{
+			exit_type=__error_value_type;
+			std::cout<<">>[Runtime-error] must use same type to use \'and\' but use \'";
+			print_scalar(left_child.get_type());
+			std::cout<<"\' and \'";
+			print_scalar(right_child.get_type());
+			std::cout<<"\'."<<std::endl;
+		}
 	}
 	else
 	{
-		
+		exit_type=__error_value_type;
+		std::cout<<">>[Runtime-error] error type occurred when doing calculation."<<std::endl;
 	}
-	return cond;
+	return temp;
 }
 
-bool abstract_syntax_tree::check()
+bool abstract_syntax_tree::condition_check()
 {
 	bool ret=false;
-	var cond=condition();
-	if(cond.get_number()==0)
-		ret=false;
+	var temp=calculation();
+	if(temp.get_type()==__var_number)
+	{
+		if(temp.get_number())
+			ret=true;
+	}
 	else
-		ret=true;
+	{
+		exit_type=__error_value_type;
+		std::cout<<">>[Runtime-error] must use a number to make a choice but use \'";
+		print_scalar(temp.get_type());
+		std::cout<<"\'."<<std::endl;
+	}
 	return ret;
 }
 
-var abstract_syntax_tree::call_id()
+var abstract_syntax_tree::call_identifier()
 {
 	var temp;
 	if(scope.search_var(name))
@@ -70,7 +405,10 @@ var abstract_syntax_tree::call_id()
 	}
 	if(!children.empty())
 	{
-		;
+		for(std::list<abstract_syntax_tree>::iterator i=children.begin();i!=children.end();++i)
+		{
+			
+		}
 	}
 	return temp;
 }
@@ -80,7 +418,7 @@ var abstract_syntax_tree::get_value()
 	var temp;
 	temp.set_type(type);
 	if(type==__id)
-		temp=call_id();
+		temp=call_identifier();
 	else if(type==__number)
 		temp.set_number(number);
 	else if(type==__string)
@@ -115,6 +453,7 @@ var abstract_syntax_tree::get_value()
 }
 void abstract_syntax_tree::run_root()
 {
+	while(!ret_stack.empty())ret_stack.pop();
 	scope.set_clear();
 	int beg_time,end_time;
 	exit_type=__process_exited_successfully;
@@ -141,12 +480,24 @@ void abstract_syntax_tree::run_root()
 				break;
 			}
 		}
+		else if(i->type==__equal || i->type==__add_equal || i->type==__sub_equal || i->type==__mul_equal || i->type==__div_equal || i->type==__link_equal)
+		{
+			;
+		}
+		else if(i->type==__add_operator || i->type==__sub_operator || i->type==__mul_operator || i->type==__div_operator || i->type==__link_operator || i->type==__or_operator || i->type==__and_operator || i->type==__nor_operator)
+		{
+			var t=i->calculation();
+			if(t.get_type()==__var_number)
+				std::cout<<t.get_number()<<std::endl;
+			else if(t.get_type()==__var_string)
+				std::cout<<t.get_string()<<std::endl;
+		}
 		else if(i->type==__number)
 			std::cout<<i->number<<std::endl;
 		else if(i->type==__string)
 			std::cout<<i->str<<std::endl;
 		else if(i->type==__id)
-			std::cout<<i->call_id().get_name()<<std::endl;
+			std::cout<<i->call_identifier().get_name()<<std::endl;
 		else if(i->type==__while)
 		{
 			scope.add_new_block_scope();
@@ -178,7 +529,7 @@ int abstract_syntax_tree::run_loop()
 	
 	abstract_syntax_tree condition=children.front();
 	abstract_syntax_tree blk=children.back();
-	while(condition.check())
+	while(condition.condition_check())
 	{
 		int type=blk.run_block();
 		if(type==__break)
@@ -199,7 +550,12 @@ int abstract_syntax_tree::run_ifelse()
 	scope.add_new_local_scope();
 	for(std::list<abstract_syntax_tree>::iterator i=children.begin();i!=children.end();++i)
 	{
-		if(i->children.front().check())
+		if(i->type!=__else && i->children.front().condition_check())
+		{
+			ret=i->children.back().run_block();
+			break;
+		}
+		else
 		{
 			ret=i->children.back().run_block();
 			break;
@@ -209,13 +565,17 @@ int abstract_syntax_tree::run_ifelse()
 	return ret;
 }
 
-void abstract_syntax_tree::run_func()
+var abstract_syntax_tree::run_func()
 {
+	var ret;
 	scope.add_new_block_scope();
 	scope.add_new_local_scope();
 	
+	//get return
 	scope.pop_last_block_scope();
-	return;
+	ret=ret_stack.top();
+	ret_stack.pop();
+	return ret;
 }
 
 int abstract_syntax_tree::run_block()
@@ -248,7 +608,19 @@ int abstract_syntax_tree::run_block()
 		else if(i->type==__string)
 			std::cout<<i->str<<std::endl;
 		else if(i->type==__id)
-			std::cout<<i->call_id().get_name()<<std::endl;
+			std::cout<<i->call_identifier().get_name()<<std::endl;
+		else if(i->type==__equal || i->type==__add_equal || i->type==__sub_equal || i->type==__mul_equal || i->type==__div_equal || i->type==__link_equal)
+		{
+			;
+		}
+		else if(i->type==__add_operator || i->type==__sub_operator || i->type==__mul_operator || i->type==__div_operator || i->type==__link_operator || i->type==__or_operator || i->type==__and_operator || i->type==__nor_operator)
+		{
+			var t=i->calculation();
+			if(t.get_type()==__var_number)
+				std::cout<<t.get_number()<<std::endl;
+			else if(t.get_type()==__var_string)
+				std::cout<<t.get_string()<<std::endl;
+		}
 		else if(i->type==__while)
 		{
 			int type=i->run_loop();
@@ -274,7 +646,16 @@ int abstract_syntax_tree::run_block()
 		else if(i->type==__break)
 			return __break;
 		else if(i->type==__return)
+		{
+			var temp;
+			temp.set_type(__null_type);
+			if(!(i->children.empty()))
+			{
+				
+			}
+			ret_stack.push(temp);
 			return __return;
+		}
 		if(exit_type!=__process_exited_successfully)
 			break;
 	}
diff --git a/balloon/abstract_syntax_tree.h b/balloon/abstract_syntax_tree.h
index 493ff92..ba998c2 100644
--- a/balloon/abstract_syntax_tree.h
+++ b/balloon/abstract_syntax_tree.h
@@ -184,14 +184,14 @@ class abstract_syntax_tree
 		{
 			return children;
 		}
-		var condition();
-		bool check();
-		var call_id();
+		var calculation();
+		bool condition_check();
+		var call_identifier();
 		var get_value();
 		void run_root();
 		int run_loop();
 		int run_ifelse();
-		void run_func();
+		var run_func();
 		int run_block();
 };
 
diff --git a/balloon/balloon.h b/balloon/balloon.h
index ad4e6bc..e9d6efa 100644
--- a/balloon/balloon.h
+++ b/balloon/balloon.h
@@ -2,8 +2,10 @@
 #define __BALLOON_H__
 
 #include <iostream>
+#include <cstdlib>
 #include <cstring>
 #include <fstream>
+#include <cmath>
 #include <list>
 #include <stack>
 #include <ctime>
diff --git a/balloon/balloon_parse.h b/balloon/balloon_parse.h
index 3bb762c..77923e4 100644
--- a/balloon/balloon_parse.h
+++ b/balloon/balloon_parse.h
@@ -654,7 +654,7 @@ abstract_syntax_tree balloon_parse::call_identifier()
 		parse.push(this_token);
 		temp=new_node;
 		new_node=assignment();
-		new_node.add_child(temp);
+		new_node.get_children().push_front(temp);
 	}
 	else
 		parse.push(this_token);
diff --git a/balloon/balloon_type.h b/balloon/balloon_type.h
index 34f4263..7e9041c 100644
--- a/balloon/balloon_type.h
+++ b/balloon/balloon_type.h
@@ -145,7 +145,9 @@ enum runtime_error_type
 	__get_value_failure,
 	__find_var_failure,
 	__error_value_type,
-	__error_command_use
+	__error_command_use,
+	__sigfpe_arithmetic_exception,
+	__sigsegv_segmentation_error
 };
 
 void print_exit_type(int type)
@@ -159,6 +161,8 @@ void print_exit_type(int type)
 		case __find_var_failure:            context="find_var_failure";break;
 		case __error_value_type:            context="value_type_error";break;
 		case __error_command_use:           context="command_use_error(continue/break/return)";break;
+		case __sigfpe_arithmetic_exception: context="SIGFPE";break;
+		case __sigsegv_segmentation_error:  context="SIGSEGV";break;
 		default:                            context="unknown";break;
 	}
 	std::cout<<context;
diff --git a/balloon/balloon_var.h b/balloon/balloon_var.h
index 30e8f09..3e2377d 100644
--- a/balloon/balloon_var.h
+++ b/balloon/balloon_var.h
@@ -7,9 +7,27 @@ enum var_type
 	__var_number,
 	__var_string,
 	__var_array,
-	__var_hash
+	__var_hash,
+	__var_function
 };
 
+void print_scalar(int type)
+{
+	std::string str="";
+	switch(type)
+	{
+		case __null_type:   str="null";break;
+		case __var_number:  str="number";break;
+		case __var_string:  str="string";break;
+		case __var_array:   str="array";break;
+		case __var_hash:    str="hash";break;
+		case __var_function:str="function";break;
+		default:            str="unknown";break;
+	}
+	std::cout<<str;
+	return;
+}
+
 class var
 {
 	private:
@@ -28,6 +46,7 @@ class var
 			name="";
 			balloon_array.clear();
 			balloon_hash.clear();
+			function.set_clear();
 			return;
 		}
 		var(const var& p)
@@ -38,6 +57,7 @@ class var
 			name=p.name;
 			balloon_array=p.balloon_array;
 			balloon_hash=p.balloon_hash;
+			function=p.function;
 			return;
 		}
 		var& operator=(const var& p)
@@ -48,8 +68,10 @@ class var
 			name=p.name;
 			balloon_array.clear();
 			balloon_hash.clear();
+			function.set_clear();
 			balloon_array=p.balloon_array;
 			balloon_hash=p.balloon_hash;
+			function=p.function;
 			return *this;
 		}
 		void set_type(int);
@@ -59,6 +81,7 @@ class var
 		void set_function(abstract_syntax_tree&);
 		void append_array(var);
 		void append_hash(var);
+		int get_type();
 		std::string get_name();
 		double get_number();
 		std::string get_string();
@@ -74,48 +97,63 @@ void var::set_type(int _type)
 	type=_type;
 	return;
 }
+
 void var::set_name(std::string _name)
 {
 	name=_name;
 	return;
 }
+
 void var::set_number(double _num)
 {
 	number=_num;
 	return;
 }
+
 void var::set_string(std::string _str)
 {
 	str=_str;
 	return;
 }
+
 void var::set_function(abstract_syntax_tree& p)
 {
 	function=p;
 	return;
 }
+
 void var::append_array(var _new_var)
 {
 	balloon_array.push_back(_new_var);
 	return;
 }
+
 void var::append_hash(var _new_var)
 {
 	balloon_hash.push_back(_new_var);
 	return;
 }
+
+int var::get_type()
+{
+	return type;
+}
+
 std::string var::get_name()
 {
 	return name;
 }
+
 double var::get_number()
 {
 	return number;
 }
+
 std::string var::get_string()
 {
 	return str;
 }
+
 var& var::get_array_member(int _place)
 {
 	if(balloon_array.empty())
@@ -130,6 +168,7 @@ var& var::get_array_member(int _place)
 	std::cout<<">>[Runtime-error] overflow when searching member "<<_place<<" but the max size of array \'"<<name<<"\' is "<<cnt<<"(this means 0-"<<cnt-1<<")."<<std::endl;
 	return error_var;
 }
+
 var& var::get_hash_member(std::string _name)
 {
 	for(std::list<var>::iterator i=balloon_hash.begin();i!=balloon_hash.end();++i)
@@ -138,6 +177,7 @@ var& var::get_hash_member(std::string _name)
 	std::cout<<">>[Runtime-error] hash \'"<<name<<"\' does not have a member named \'"<<_name<<"\'"<<std::endl;
 	return error_var;
 }
+
 abstract_syntax_tree& var::get_function()
 {
 	return function;
diff --git a/balloon/var.txt b/balloon/var.txt
index b45120a..8201c00 100644
--- a/balloon/var.txt
+++ b/balloon/var.txt
@@ -16,4 +16,9 @@ a=2;
 var i=func(v1,v2,v3){return [0,0,0];};
 1073741824;
 "str";
-a;
\ No newline at end of file
+a;
+var m=[0,[0,1]];
+1+1;
+"hello "~"world!";
+#10/0;
+1+"h";
\ No newline at end of file