From e8fad23955ceadaa0f93ed815422c579ad72c3d9 Mon Sep 17 00:00:00 2001
From: Valk Richard Li <48872266+ValKmjolnir@users.noreply.github.com>
Date: Sat, 10 Aug 2019 23:41:39 +0800
Subject: [PATCH] update parse

---
 version0.2/nasal.h               |   8 +-
 version0.2/nasal_func_stack.h    |  39 +--
 version0.2/nasal_functional.cpp  | 573 ++++++++++++++++++-------------
 version0.2/nasal_functional.h    |  35 ++
 version0.2/nasal_interpreter.cpp |  13 +-
 version0.2/nasal_lexer.h         |  60 ++--
 version0.2/nasal_parse.h         |   7 +
 version0.2/nasal_print.h         |  27 +-
 version0.2/nasal_var_stack.h     |  59 +++-
 9 files changed, 512 insertions(+), 309 deletions(-)
 create mode 100644 version0.2/nasal_parse.h

diff --git a/version0.2/nasal.h b/version0.2/nasal.h
index 759fca1..7c4600e 100644
--- a/version0.2/nasal.h
+++ b/version0.2/nasal.h
@@ -20,13 +20,13 @@ namespace nasal
 #include "nasal_var.cpp"
 #include "nasal_list.cpp"
 #include "nasal_hash.cpp"
-//#include "nasal_print.h"
-//#include "nasal_var_stack.h"
-//#include "nasal_func_stack.h"
+#include "nasal_print.h"
+#include "nasal_var_stack.h"
+#include "nasal_func_stack.h"
 #include "nasal_functional.cpp"
 
 #include "nasal_lexer.h"
-
+#include "nasal_parse.h"
 }
 
 #endif
diff --git a/version0.2/nasal_func_stack.h b/version0.2/nasal_func_stack.h
index a48d2a8..9753fd5 100644
--- a/version0.2/nasal_func_stack.h
+++ b/version0.2/nasal_func_stack.h
@@ -1,12 +1,9 @@
 #ifndef __NASAL_FUNC_STACK_H__
 #define __NASAL_FUNC_STACK_H__
 
-#include "nasal_func.h"
+#include "nasal_functional.h"
 
 
-namespace nasal
-{
-
 struct func_stack_unit
 {
 	std::string func_name;
@@ -60,21 +57,21 @@ class func_stack
 			temp->func_statement=temp_func;
 			return;
 		}
-		void run_function(std::string &function_name)
-		{
-			func_stack_unit *temp=head;
-			while(temp->next)
-			{
-				temp=temp->next;
-				if(temp->func_name==function_name)
-				{
-					temp->func_statement.run();
-					return;
-				}
-			}
-			std::cout<<"[Error] Could not find this function."<<std::endl;
-			return;
-		}
+//		void run_function(std::string &function_name)
+//		{
+//			func_stack_unit *temp=head;
+//			while(temp->next)
+//			{
+//				temp=temp->next;
+//				if(temp->func_name==function_name)
+//				{
+//					temp->func_statement.run();
+//					return;
+//				}
+//			}
+//			std::cout<<"[Error] Could not find this function."<<std::endl;
+//			return;
+//		}
 		void print_function()
 		{
 			func_stack_unit *temp=head;
@@ -117,8 +114,6 @@ class func_stack
 			return;
 		}
 };
-
-}
-
+func_stack nasal_func_stack;
 
 #endif
diff --git a/version0.2/nasal_functional.cpp b/version0.2/nasal_functional.cpp
index 12ed21e..29c9103 100644
--- a/version0.2/nasal_functional.cpp
+++ b/version0.2/nasal_functional.cpp
@@ -2,6 +2,64 @@
 #define __NASAL_FUNCTIONAL_CPP__
 
 #include "nasal_functional.h"
+#include "nasal_var_stack.h"
+#include "nasal_func_stack.h"
+
+bool is_float(std::string &str)
+{
+	for(int i=0;i<(int)str.length();++i)
+		if(str[i]=='.')
+			return true;
+	return false;
+}
+long long int int_str2num(std::string &str)
+{
+	for(int i=0;i<(int)str.length();++i)
+		if(!(('0'<=str[i]) && (str[i]<='9') || (str[i]=='.')))
+		{
+			std::cout<<"[Error] Non-numeric string."<<std::endl;
+			return 0;
+		}
+	long long int num=0;
+	long long int acc=1;
+	for(int i=(int)str.length()-1;i>=0;--i)
+	{
+		num+=acc*((long long int)(str[i]-'0'));
+		acc*=10;
+	}
+	return num;
+}
+double double_str2num(std::string &str)
+{
+	for(int i=0;i<(int)str.length();++i)
+		if(!(('0'<=str[i]) && (str[i]<='9') || (str[i]=='.')))
+		{
+			std::cout<<"[Error] Non-numeric string."<<std::endl;
+			return 0;
+		}
+	int DotPlace=0;
+	for(int i=0;i<(int)str.length();++i)
+		if(str[i]=='.')
+		{
+			DotPlace=i;
+			break;
+		}
+	double num=0;
+	double acc=1;
+	double aff=0.1;
+	for(int i=DotPlace+1;i<(int)str.length();++i)
+	{
+		num+=aff*((double)(str[i]-'0'));
+		aff*=0.1;
+	}
+	for(int i=DotPlace-1;i>=0;--i)
+	{
+		num+=acc*((double)(str[i]-'0'));
+		acc*=10;
+	}
+	return num;
+}
+
 
 func::func()
 {
@@ -135,6 +193,7 @@ void func::append_token(const int _line,const int _type,std::string &_content)
 
 token_list::token_list()
 {
+	list_range=0;
 	head=new token_unit;
 	head->type=FUNC_BEGIN;
 	head->content="__process_begin";
@@ -153,6 +212,14 @@ token_list::~token_list()
 	}
 	delete temp;
 }
+token_unit* token_list::get_head()
+{
+	return head;
+}
+int token_list::get_list_range()
+{
+	return list_range;
+}
 void token_list::print_line_token(const int _line)
 {
 	std::cout<<"line "<<_line<<": ";
@@ -190,6 +257,7 @@ void token_list::append(const int _line,const int _type,std::string &_content)
 	token_unit *temp=head;
 	while(temp->next)
 		temp=temp->next;
+	++list_range;
 	temp->next=new token_unit;
 	temp=temp->next;
 	temp->next=NULL;
@@ -208,260 +276,305 @@ void token_list::print()
 	{
 		temp=temp->next;
 		std::cout<<"line "<<temp->line<<": ";
-		if(temp->type==FUNC_OPERATOR)
+		if(temp->type==OPERATOR)
 			std::cout<<"( Operator     | ";
-		else if(temp->type==FUNC_IDENTIFIER)
+		else if(temp->type==IDENTIFIER)
 			std::cout<<"( Identifier   | ";
-		else if(temp->type==FUNC_NUMBER)
+		else if(temp->type==NUMBER)
 			std::cout<<"( Number       | ";
-		else if(temp->type==FUNC_RESERVEWORD)
+		else if(temp->type==RESERVEWORD)
 			std::cout<<"( ReserveWord  | ";
-		else if(temp->type==FUNC_STRING)
+		else if(temp->type==STRING)
 			std::cout<<"( String       | ";
 		std::cout<<temp->content<<" )"<<std::endl;
 	}
 	return;
 }
-/*
-void token_list::run()
+
+parse::parse()
 {
-	nasal_var_stack.delete_all();
-	nasal_func_stack.delete_all();
-	token_unit *temp=head;
-	if(!head->next)
+	len=0;
+	content_array=new parse_unit[4096];
+	statement=new parse_unit[2048];
+}
+parse::~parse()
+{
+	if(content_array)
+		delete []content_array;
+	if(statement)
+		delete []statement;
+}
+void parse::content_array_set_empty()
+{
+	for(int i=0;i<4096;++i)
 	{
-		std::cout<<">> Running complete."<<std::endl;
-		return;
+		content_array[i].line=0;
+		content_array[i].type=0;
+		content_array[i].content="";
 	}
-	
+	return;
+}
+void parse::statement_set_empty()
+{
+	for(int i=0;i<2048;++i)
+	{
+		statement[i].line=0;
+		statement[i].type=0;
+		statement[i].content="";
+	}
+	return;
+}
+void parse::brace_check()
+{
+	int curve=0;
+	int bracket=0;
+	int brace=0;
+	for(int i=1;i<=len;++i)
+	{
+		if(content_array[i].content=="(")
+			++curve;
+		else if(content_array[i].content==")")
+			--curve;
+		else if(content_array[i].content=="[")
+			++bracket;
+		else if(content_array[i].content=="]")
+			--bracket;
+		else if(content_array[i].content=="{")
+			++brace;
+		else if(content_array[i].content=="}")
+			--brace;
+	}
+	if(curve>0)
+		std::cout<<"[Error] Missing \")\" ."<<std::endl;
+	else if(curve<0)
+		std::cout<<"[Error] Missing \"(\" ."<<std::endl;
+	if(bracket>0)
+		std::cout<<"[Error] Missing \"]\" ."<<std::endl;
+	else if(bracket<0)
+		std::cout<<"[Error] Missing \"[\" ."<<std::endl;
+	if(brace>0)
+		std::cout<<"[Error] Missing \"}\" ."<<std::endl;
+	else if(brace<0)
+		std::cout<<"[Error] Missing \"{\" ."<<std::endl;
+	return;
+}
+bool parse::def_function()
+{
+	if(statement[0].content=="var" && statement[1].type==IDENTIFIER && statement[2].content=="=" && statement[3].content=="func")
+		return true;
+	return false;
+}
+bool parse::def_array()
+{
+	if(statement[0].content=="var" && statement[1].type==IDENTIFIER && statement[2].content=="=" && statement[3].content=="[")
+		return true;
+	return false;
+}
+bool parse::def_hash()
+{
+	if(statement[0].content=="var" && statement[1].type==IDENTIFIER && statement[2].content=="=" && statement[3].content=="{")
+		return true;
+	return false;
+}
+bool parse::def_scalar()
+{
+	if(statement[0].content=="var" && statement[1].type==IDENTIFIER && statement[2].content=="=" && (statement[3].type==NUMBER || statement[3].type==STRING))
+	{
+		if(statement[3].type==NUMBER)
+		{
+			var temp_var;
+			if(is_float(statement[3].content))
+			{
+				temp_var.type=VAR_DOUBLE;
+				temp_var.data=new double;
+				*((double *)temp_var.data)=double_str2num(statement[3].content);
+			}
+			else
+			{
+				temp_var.type=VAR_LLINT;
+				temp_var.data=new long long int;
+				*((long long int *)temp_var.data)=int_str2num(statement[3].content);
+			}
+			nasal_var_stack.append_var(statement[1].content,temp_var);
+		}
+		else if(statement[3].type==STRING)
+		{
+			var temp_var;
+			temp_var.type=VAR_STRING;
+			temp_var.data=new std::string;
+			std::string temp_str="";
+			for(int i=1;i<(int)statement[3].content.length()-1;++i)
+				temp_str+=statement[3].content[i];
+			*((std::string *)temp_var.data)=temp_str;
+			nasal_var_stack.append_var(statement[1].content,temp_var);
+		}
+		return true;
+	}
+	return false;
+}
+void parse::definition()
+{
+	int brace=0;
+	for(int i=0;i<2048;++i)
+	{
+		if(!statement[i].line)
+		{
+			std::cout<<"[Error] line "<<statement[0].line<<": Expect a \";\" after "<<statement[0].content<<"."<<std::endl;
+			break;
+		}
+		if(statement[i].content==";" && !brace)
+			break;
+		if(statement[i].content=="{")
+			++brace;
+		if(statement[i].content=="}")
+			--brace;
+		if(!statement[i].type && brace)
+			std::cout<<"[Error] Missing \""<<(brace>0? '}':'{')<<"\" ."<<std::endl;
+	}
+	if(def_function() || def_array() || def_hash() || def_scalar())
+	{
+		;
+	}
+	else
+		std::cout<<"[Error] line "<<statement[0].line<<": Missing elements."<<std::endl;
+	return;
+}
+bool parse::asi_function()
+{
+	return false;
+}
+bool parse::asi_array()
+{
+	return false;
+}
+bool parse::asi_hash()
+{
+	return false;
+}
+bool parse::asi_scalar()
+{
+	if(statement[0].type==IDENTIFIER && statement[1].content=="=" && statement[2].type==IDENTIFIER && statement[3].content==";")
+	{
+		var temp_var=nasal_var_stack.search_var(statement[2].content);
+		nasal_var_stack.edit_var(statement[0].content,temp_var);
+		return true;
+	}
+	else if(statement[0].type==IDENTIFIER && statement[1].content=="=" && statement[2].type==NUMBER && statement[3].content==";")
+	{
+		var temp_var;
+		if(is_float(statement[2].content))
+		{
+			temp_var.type=VAR_DOUBLE;
+			temp_var.data=new double;
+			*((double *)temp_var.data)=double_str2num(statement[2].content);
+		}
+		else
+		{
+			temp_var.type=VAR_LLINT;
+			temp_var.data=new long long int;
+			*((long long int *)temp_var.data)=int_str2num(statement[2].content);
+		}
+		nasal_var_stack.edit_var(statement[0].content,temp_var);
+		return true;
+	}
+	else if(statement[0].type==IDENTIFIER && statement[1].content=="=" && statement[2].type==STRING && statement[3].content==";")
+	{
+		var temp_var;
+		temp_var.type=VAR_STRING;
+		temp_var.data=new std::string;
+		std::string temp_str="";
+		for(int i=1;i<(int)statement[2].content.length()-1;++i)
+			temp_str+=statement[2].content[i];
+		*((std::string *)temp_var.data)=temp_str;
+		nasal_var_stack.edit_var(statement[1].content,temp_var);
+		return true;
+	}
+	return false;
+}
+void parse::assignment()
+{
+	int brace=0;
+	for(int i=0;i<2048;++i)
+	{
+		if(statement[i].line==0)
+		{
+			std::cout<<"[Error] line "<<statement[0].line<<": Expect a \";\" after "<<statement[0].content<<"."<<std::endl;
+			break;
+		}
+		if(statement[i].content==";" && !brace)
+			break;
+		if(statement[i].content=="{")
+			++brace;
+		if(statement[i].content=="}")
+			--brace;
+		if(!statement[i].type && brace)
+			std::cout<<"[Error] Missing \""<<(brace>0? '}':'{')<<"\" ."<<std::endl;
+	}
+	if(asi_function() || asi_array() || asi_hash() || asi_scalar())
+	{
+		;
+	}
+	else
+		std::cout<<"[Error] line "<<statement[0].line<<": Missing elements."<<std::endl;
+	return;
+}
+void parse::total_run(token_list& p)
+{
+	len=0;
+	token_unit *temp=p.get_head();
 	while(temp->next)
 	{
 		temp=temp->next;
-		if(temp->type=="Operator")
+		++len;//begin from 1
+		content_array[len].type=temp->type;
+		content_array[len].line=temp->line;
+		content_array[len].content=temp->content;
+	}
+	brace_check();
+	for(int i=1;i<=len;++i)
+	{
+		if(content_array[i].type==RESERVEWORD && content_array[i].content=="var")
 		{
-			;
-		}
-		else if(temp->type=="Identifier")
-		{
-			;
-		}
-		else if(temp->type=="Number")
-		{
-			print_line_token(temp->line);
-			std::cout<<"line "<<temp->line<<": "<<"[Error] Number without any tokens."<<std::endl;
-			return;
-		}
-		else if(temp->type=="ReserveWord")
-		{
-			if(temp->content=="var")
+			int in_brace=0;
+			statement_set_empty();
+			for(int j=i;j<=len;++j)
 			{
-				if(temp->next)
-					temp=temp->next;
-				else
+				statement[j-i]=content_array[j];
+				if(content_array[j].type==OPERATOR && content_array[j].content==";" && in_brace==0)
 				{
-					print_line_token(temp->line);
-					std::cout<<"line "<<temp->line<<": "<<"[Error] Missing elements after \"var\"."<<std::endl;
-					return;
-				}
-				//end identifier
-				std::string name_of_var;
-				if(temp->type=="Identifier")
-					name_of_var=temp->content;
-				else
-				{
-					print_line_token(temp->line);
-					std::cout<<"line "<<temp->line<<": "<<"[Error] Missing identifier after \"var\"."<<std::endl;
-					return;
-				}
-				if(temp->next)
-					temp=temp->next;
-				else
-				{
-					print_line_token(temp->line);
-					std::cout<<"line "<<temp->line<<": "<<"[Error] Missing operator \"=\" after identifier."<<std::endl;
-					return;
-				}
-				if(temp->content!="=")
-				{
-					print_line_token(temp->line);
-					std::cout<<"line "<<temp->line<<": "<<"[Error] Missing operator \"=\" after identifier."<<std::endl;
-					return;
-				}
-				if(temp->next)
-					temp=temp->next;
-				else
-				{
-					print_line_token(temp->line);
-					std::cout<<"line "<<temp->line<<": "<<"[Error] Missing value after operator \"=\" ."<<std::endl;
-					return;
-				}
-				if(temp->type=="Number")
-				{
-					temp_var.isGlobal=true;
-					if(isFloat(temp->content))
-					{
-						temp_var.Type="double";
-						temp_var.data=new double;
-						*((double *)temp_var.data)=double_Str2Num(temp->content);
-						nasal_var_stack.append_var(name_of_var,temp_var);
-						delete (double *)temp_var.data;
-						temp_var.data=NULL;
-					}
-					else
-					{
-						temp_var.Type="long long int";
-						temp_var.data=new long long int;
-						*((long long int *)temp_var.data)=int_Str2Num(temp->content);
-						nasal_var_stack.append_var(name_of_var,temp_var);
-						delete (long long int *)temp_var.data;
-						temp_var.data=NULL;
-					}
-				}
-				else if(temp->type=="String")
-				{
-					temp_var.isGlobal=true;
-					temp_var.Type="string";
-					temp_var.data=new std::string;
-					std::string temp_string="";
-					for(int i=1;i<(int)temp->content.length()-1;++i)
-						temp_string+=temp->content[i];
-					*((std::string *)temp_var.data)=temp_string;
-					nasal_var_stack.append_var(name_of_var,temp_var);
-					delete (std::string *)temp_var.data;
-					temp_var.data=NULL;
-				}
-				else if(temp->type=="Operator" && temp->content=="{")
-				{
-					bool make_pair=false;
-					int cnt=1;
-					while(temp->next)
-					{
-						temp=temp->next;
-						if(temp->type=="Operator" && temp->content=="}")
-						{
-							--cnt;
-							if(!cnt)
-							{
-								make_pair=true;
-								break;
-							}
-						}
-						else if(temp->type=="Operator" && temp->content=="{")
-							++cnt;
-					}
-					if(!make_pair)
-					{
-						print_line_token(temp->line);
-						std::cout<<"line "<<temp->line<<": "<<"[Error] Expect a \"}\"."<<std::endl;
-						return;
-					}
-				}
-				else if(temp->type=="Operator" && temp->content=="[")
-				{
-					bool make_pair=false;
-					int cnt=1;
-					while(temp->next)
-					{
-						temp=temp->next;
-						if(temp->type=="Operator" && temp->content=="]")
-						{
-							--cnt;
-							if(!cnt)
-							{
-								make_pair=true;
-								break;
-							}
-						}
-						else if(temp->type=="Operator" && temp->content=="[")
-							++cnt;
-					}
-					if(!make_pair)
-					{
-						print_line_token(temp->line);
-						std::cout<<"line "<<temp->line<<": "<<"[Error] Expect a \"]\"."<<std::endl;
-						return;
-					}
-				}
-				else
-				{
-					print_line_token(temp->line);
-					std::cout<<"line "<<temp->line<<": "<<"[Error] Missing value after operator \"=\" ."<<std::endl;
-					return;
-				}
-						
-				if(!(temp->next && temp->next->content==";"))
-				{
-					print_line_token(temp->line);
-					std::cout<<"line "<<temp->line<<": "<<"[Error] Expect a \";\" at the end of the statement."<<std::endl;
-					nasal_var_stack.pop_var();
-					return; 
-				} 
-				else
-					temp=temp->next;
-			//end var
-			}
-			else if(temp->content=="print")
-			{
-				if(temp->next && temp->next->content=="(")
-				{
-					temp=temp->next;
-					while(temp->next)
-					{
-						temp=temp->next;
-						if(temp->type=="String")
-						{
-							std::string temp_string="";
-							for(int i=1;i<(int)temp->content.length()-1;++i)
-								temp_string+=temp->content[i];
-							PrintString(temp_string);
-						}
-						else if(temp->type=="Identifier")
-							PrintVar(nasal_var_stack.SearchVar(temp->content));
-						else if(temp->type=="Operator" && temp->content==")")
-						{
-							if(!temp->next)
-							{
-								print_line_token(temp->line);
-								std::cout<<"line "<<temp->line<<": "<<"[Error] Expect a \";\" at the end of the statement."<<std::endl;
-								return;
-							}
-							break;
-						}
-						else if(temp->type=="Operator" && temp->content==";")
-						{
-							print_line_token(temp->line);
-							std::cout<<"line "<<temp->line<<": "<<"[Error] Expect a \")\" at the end of print."<<std::endl;
-							return;
-						}
-					}
-				}
-				else
-				{
-					print_line_token(temp->line);
-					std::cout<<"line "<<temp->line<<": "<<"[Error] Expect a \"(\" after function print."<<std::endl;
-					return;
-				}
-				if(!(temp->next && temp->next->content==";"))
-				{
-					print_line_token(temp->line);
-					std::cout<<"line "<<temp->line<<": "<<"[Error] Expect a \";\" at the end of the statement."<<std::endl;
-					return;
+					i=j;
+					break;
 				}
+				if(content_array[j].type==OPERATOR && content_array[j].content=="{")
+					++in_brace;
+				if(content_array[j].type==OPERATOR && content_array[j].content=="}")
+					--in_brace;
 			}
+			definition();
 		}
-		else if(temp->type=="String")
+		else if(content_array[i].type==IDENTIFIER)
 		{
-			print_line_token(temp->line);
-			std::cout<<"line "<<temp->line<<": "<<"[Error] String without any tokens."<<std::endl;
-			return;
+			int in_brace=0;
+			statement_set_empty();
+			for(int j=i;j<=len;++j)
+			{
+				statement[j-i]=content_array[j];
+				if(content_array[j].type==OPERATOR && content_array[j].content==";" && in_brace==0)
+				{
+					i=j;
+					break;
+				}
+				if(content_array[j].type==OPERATOR && content_array[j].content=="{")
+					++in_brace;
+				if(content_array[j].type==OPERATOR && content_array[j].content=="}")
+					--in_brace;
+			}
+			assignment();
 		}
 	}
-	//nasal_var_stack.print_var(); //for debug mode
-	//nasal_func_stack.print_function(); //for debug mode
-	nasal_var_stack.delete_all();
-	nasal_func_stack.delete_all();
-	std::cout<<">> Running complete."<<std::endl;
+	nasal_var_stack.print_var();
+	nasal_func_stack.print_function();
 	return;
-}*/
+}
 
 #endif
diff --git a/version0.2/nasal_functional.h b/version0.2/nasal_functional.h
index 051404b..7827802 100644
--- a/version0.2/nasal_functional.h
+++ b/version0.2/nasal_functional.h
@@ -50,13 +50,48 @@ class token_list
 {
 	private:
 		token_unit *head;
+		int list_range;
 	public:
 		token_list();
 		~token_list();
+		token_unit* get_head();
+		int get_list_range();
 		void print_line_token(const int);
 		void delete_all();
 		void append(const int,const int,std::string&);
 		void print();
 };
 
+struct parse_unit
+{
+	int type;
+	std::string content;
+	int line;
+};
+
+class parse
+{
+	private:
+		parse_unit *content_array;
+		parse_unit *statement;
+		int len;
+	public:
+		parse();
+		~parse();
+		void content_array_set_empty();
+		void statement_set_empty();
+		void brace_check();
+		bool def_function();
+		bool def_array();
+		bool def_hash();
+		bool def_scalar();
+		bool asi_function();
+		bool asi_array();
+		bool asi_hash();
+		bool asi_scalar();
+		void definition();
+		void assignment();
+		void total_run(token_list&);
+};
+
 #endif
diff --git a/version0.2/nasal_interpreter.cpp b/version0.2/nasal_interpreter.cpp
index a6c07d1..1c4dbd5 100644
--- a/version0.2/nasal_interpreter.cpp
+++ b/version0.2/nasal_interpreter.cpp
@@ -10,7 +10,7 @@ int main()
 	while(1)
 	{
 		std::cout<<">> ";
-		std::cin>>command;
+		std::getline(std::cin,command);
 		if(command=="help")
 		{
 			std::cout<<">> 1. input file name to run the nasal script."<<std::endl;
@@ -19,6 +19,7 @@ int main()
 			std::cout<<">> 4. command lexer to see tokens in stack."<<std::endl;
 			std::cout<<">> 5. command del to delete all elements in stack."<<std::endl;
 			std::cout<<">> 6. command run to run the programme in stack."<<std::endl;
+			std::cout<<">> 7. command rs to check the source program."<<std::endl;
 		}
 		else if(command=="cls")
 		{
@@ -26,15 +27,23 @@ int main()
 			//linux system("clear");
 			//macOS system("clear");
 		}
+		else if(command=="rs")
+			nasal::PrintSourceFile();
 		else if(command=="exit")
 			break;
 		else if(command=="lexer")
 			nasal::nasal_lexer.print();
 		else if(command=="del")
+		{
 			nasal::nasal_lexer.delete_all();
+			nasal::nasal_var_stack.delete_all();
+			nasal::nasal_func_stack.delete_all();
+		}
 		else if(command=="run")
 		{
-			;
+			nasal::nasal_var_stack.delete_all();
+			nasal::nasal_func_stack.delete_all();
+			nasal::nasal_parse.total_run(nasal::nasal_lexer);
 		}
 		else
 			nasal::RunProcess(command);
diff --git a/version0.2/nasal_lexer.h b/version0.2/nasal_lexer.h
index b1fa798..0a8b149 100644
--- a/version0.2/nasal_lexer.h
+++ b/version0.2/nasal_lexer.h
@@ -30,7 +30,7 @@ std::string OperatorOrDelimiter[40]=
 };
 
 std::string IdentifierTable[1000]={""};
-char ResourcePrograme[16777216];
+char ResourceProgram[16777216];
 
 int isReserveWord(std::string &p)
 {
@@ -61,39 +61,46 @@ bool isNumber(char t)
 void InputFile(std::string &FileName)
 {
 	std::ifstream fin(FileName);
-	if(fin.fail())
-	{
-		std::cout<<"[Error] Failed to load file: "<<FileName<<std::endl;
-		ResourcePrograme[0]='@';
-		fin.close();
-		return;
-	}
 	int i=0;
 	bool FindNote=false;
 	while(!fin.eof())
 	{
-		ResourcePrograme[i]=fin.get();
-		if(ResourcePrograme[i]=='\n')
+		ResourceProgram[i]=fin.get();
+		if(ResourceProgram[i]=='\n')
 			FindNote=false;
-		if(ResourcePrograme[i]!='#' && !FindNote)
+		if(ResourceProgram[i]!='#' && !FindNote)
 			++i;
-		else if(ResourcePrograme[i]=='#')
+		else if(ResourceProgram[i]=='#')
 		{
 			FindNote=true;
 		}
 		if(fin.eof())
 			break;
 	}
-	ResourcePrograme[i]='@';
-//	print source file
-//	++i;
-//	for(int j=0;j<i;++j)
-//		std::cout<<ResourcePrograme[j];
-//	std::cout<<std::endl;
+	ResourceProgram[i]=0;
+
 	fin.close();
 	return;
 }
 
+void PrintSourceFile()
+{
+	int line=1;
+	std::cout<<line<<"	";
+	for(int i=0;i<16777216;++i)
+	{
+		if(!ResourceProgram[i])
+			break;
+		std::cout<<ResourceProgram[i];
+		if(ResourceProgram[i]=='\n')
+		{
+			++line;
+			std::cout<<line<<"	";
+		}
+	}
+	std::cout<<std::endl;
+}
+
 void Scanner(int &Syn,const char Source[],std::string &token,int &ptr,int &line)
 {
 	char temp;
@@ -200,7 +207,7 @@ void Scanner(int &Syn,const char Source[],std::string &token,int &ptr,int &line)
 				++ptr;
 				temp=Source[ptr];
 			}
-			if(temp=='@' || temp=='\n')
+			if(temp==0 || temp=='\n')
 				break;
 		}
 		//add the last char \"
@@ -212,7 +219,7 @@ void Scanner(int &Syn,const char Source[],std::string &token,int &ptr,int &line)
 		else
 			token+=" __missing_end_of_string";
 	}
-	else if(temp=='@')
+	else if(temp==0)
 	{
 		Syn=SCANEND;
 		return;
@@ -241,12 +248,21 @@ void RunProcess(std::string &FileName)
 	int Ptr=0;//pointer to one char in ResourcePrograme
 	int line=1;
 	std::string token;
+	std::ifstream fin(FileName);
+	if(fin.fail())
+	{
+		std::cout<<"[Error] Failed to load file: "<<FileName<<std::endl;
+		fin.close();
+		return;
+	}
+	else
+		fin.close();
+	ResourceProgram[0]=0;
 	nasal_lexer.delete_all();
-	
 	InputFile(FileName);
 	while(Syn!=SCANEND && Syn!=ERRORFOUND)
 	{
-		Scanner(Syn,ResourcePrograme,token,Ptr,line);
+		Scanner(Syn,ResourceProgram,token,Ptr,line);
 		if(Syn>0)//all Syn type is larger than zero
 			nasal_lexer.append(line,Syn,token);
 	}
diff --git a/version0.2/nasal_parse.h b/version0.2/nasal_parse.h
new file mode 100644
index 0000000..0411e27
--- /dev/null
+++ b/version0.2/nasal_parse.h
@@ -0,0 +1,7 @@
+#ifndef __NASAL_PARSE_H__
+#define __NASAL_PARSE_H__
+#include "nasal_lexer.h"
+
+parse nasal_parse;
+
+#endif
diff --git a/version0.2/nasal_print.h b/version0.2/nasal_print.h
index 95b880c..6a6b734 100644
--- a/version0.2/nasal_print.h
+++ b/version0.2/nasal_print.h
@@ -6,9 +6,6 @@
 #include "nasal_hash.cpp"
 #include "nasal_list.cpp"
 
-namespace nasal
-{
-
 void PrintString(std::string &PrintInfo)
 {
 	for(int i=0;i<(int)PrintInfo.length();++i)
@@ -60,26 +57,20 @@ void PrintString(std::string &PrintInfo)
 }
 void PrintVar(var Var)
 {
-	if(Var.Type=="int")
-		std::cout<<*((int *)Var.data);
-	else if(Var.Type=="long long int")
+	if(Var.type==VAR_LLINT)
 		std::cout<<*((long long int *)Var.data);
-	else if(Var.Type=="float")
-		std::cout<<*((float *)Var.data);
-	else if(Var.Type=="double")
+	else if(Var.type==VAR_DOUBLE)
 		std::cout<<*((double *)Var.data);
-	else if(Var.Type=="char")
+	else if(Var.type==VAR_CHAR)
 		std::cout<<*((char *)Var.data);
-	else if(Var.Type=="string")
+	else if(Var.type==VAR_STRING)
 		PrintString(*((std::string *)Var.data));
-	else if(Var.Type=="array")
-		((NasalList *)Var.data)->PrintList();
-	else if(Var.Type=="hash")
-		((NasalHash *)Var.data)->PrintHash();
+//	else if(Var.type==VAR_LIST)
+//		((NasalList *)Var.data)->PrintList();
+//	else if(Var.type==VAR_HASH)
+//		((NasalHash *)Var.data)->PrintHash();
 	else
-		std::cout<<"null";
-}
-
+		std::cout<<"[Error] Null type or function";
 }
 
 #endif
diff --git a/version0.2/nasal_var_stack.h b/version0.2/nasal_var_stack.h
index b884e9b..8d97285 100644
--- a/version0.2/nasal_var_stack.h
+++ b/version0.2/nasal_var_stack.h
@@ -3,9 +3,6 @@
 
 #include "nasal_print.h"
 
-namespace nasal
-{
-
 struct var_stack_unit
 {
 	std::string var_name;
@@ -41,7 +38,7 @@ class var_stack
 			else
 				delete head;
 		}
-		void append_var(std::string &varia_name,var &temp_var)
+		void append_var(std::string& varia_name,var& temp_var)
 		{
 			var_stack_unit *temp=head;
 			while(temp->next)
@@ -58,8 +55,33 @@ class var_stack
 			while(temp->next)
 			{
 				temp=temp->next;
-				std::cout<<"["<<temp->var_detail.Type<<"]: "<<temp->var_name<<" : ";
-				if(temp->var_detail.Type!="string")
+				std::cout<<"[";
+				switch(temp->var_detail.type)
+				{
+					case VAR_NONE:
+						std::cout<<"null";
+						break;
+					case VAR_LLINT:
+						std::cout<<"int";
+						break;
+					case VAR_DOUBLE:
+						std::cout<<"float";
+						break;
+					case VAR_CHAR:
+						std::cout<<"char";
+						break;
+					case VAR_STRING:
+						std::cout<<"string";
+						break;
+					case VAR_LIST:
+						std::cout<<"array";
+						break;
+					case VAR_HASH:
+						std::cout<<"hash";
+						break;
+				}
+				std::cout<<"]: "<<temp->var_name<<" : ";
+				if(temp->var_detail.type!=VAR_STRING)
 					PrintVar(temp->var_detail);
 				else
 					std::cout<<*((std::string *)temp->var_detail.data);
@@ -67,21 +89,37 @@ class var_stack
 			}
 			return;
 		}
-		var SearchVar(std::string varia_name)
+		var search_var(std::string varia_name)
 		{
 			var temp_var;
 			temp_var.data=NULL;
-			temp_var.Type="null";
-			temp_var.isGlobal=false;
+			temp_var.type=VAR_NONE;
 			var_stack_unit *temp=head;
 			while(temp->next)
 			{
 				temp=temp->next;
 				if(temp->var_name==varia_name)
+				{
 					temp_var=temp->var_detail;
+					break;
+				}
 			}
 			return temp_var;
 		}
+		void edit_var(std::string varia_name,var &temp_var)
+		{
+			var_stack_unit *temp=head;
+			while(temp->next)
+			{
+				temp=temp->next;
+				if(temp->var_name==varia_name)
+				{
+					temp->var_detail=temp_var;
+					break;
+				}
+			}
+			return;
+		}
 		void pop_var()
 		{
 			var_stack_unit *temp=head;
@@ -113,7 +151,6 @@ class var_stack
 			return;
 		}
 };
-
-}
+var_stack nasal_var_stack;
 
 #endif