diff --git a/README.md b/README.md
new file mode 100644
index 0000000..94183a3
--- /dev/null
+++ b/README.md
@@ -0,0 +1,30 @@
+# Parser
+## Explanation of options:
+```cpp
+// Bison version
+%require "3.0.4"
+
+// skeleton program to be used as parser
+%skeleton "lalr1.cc" 
+
+// tells bison to generate a header file
+%defines 
+
+// where the parser will live (in what namespace)
+%define api.prefix {yy} 
+
+// the name of parser class
+%define api.parser.class {Parser} 
+
+/* it will generate a location class which can be used in your lexer */
+%locations
+
+/* use the constructor for each token, and make_TOKENNAME functions will be generated */
+%define api.token.constructor 
+
+/* use the variant type for $1~$n and $$ those variables */
+%define api.value.type variant
+
+%define parse.trace
+%define parse.error verbose
+```
\ No newline at end of file
diff --git a/makefile b/makefile
index d04c0e3..f567b25 100644
--- a/makefile
+++ b/makefile
@@ -5,7 +5,7 @@ FLEX = flex
 
 TARGET = build/py2rb
 
-$(TARGET): build/lexer.o build/parser.o build/ParserCtx.o  build/main.o
+$(TARGET): build/lexer.o build/parser.o build/ParserCtx.o  build/main.o build/config.o
 	$(CXX) $^ -o $@
 
 build/lexer.hpp build/lexer.cpp: src/lexer.l build/parser.hpp build
@@ -26,6 +26,9 @@ build/ParserCtx.o: src/ParserCtx.cpp build
 build/main.o: src/main.cpp build
 	$(CXX) -c $(ARGS)  $< -o $@
 
+build/config.o: src/config.cpp build
+	$(CXX) -c $(ARGS)  $< -o $@
+
 build:
 	mkdir -p build
 
diff --git a/src/config.cpp b/src/config.cpp
new file mode 100644
index 0000000..7e313b2
--- /dev/null
+++ b/src/config.cpp
@@ -0,0 +1,30 @@
+#include "../src/config.hpp"
+#include <iostream>
+#include <stdexcept>
+
+Configuration::Configuration(int argc, char **argv)
+{
+    if (argc <= 1)
+    {
+        return;
+    }
+
+    int opt;
+    while ((opt = getopt(argc, argv, "i:o:l")) != -1)
+    {
+        switch (opt)
+        {
+        case 'i':
+            input_file = optarg;
+            break;
+        case 'o':
+            output_file = optarg;
+            break;
+        case 'l':
+            debug_lexer = true;
+            break;
+        default:
+        }
+    }
+    valid = true;
+}
diff --git a/src/config.hpp b/src/config.hpp
new file mode 100644
index 0000000..86d8018
--- /dev/null
+++ b/src/config.hpp
@@ -0,0 +1,14 @@
+#pragma once
+#include <getopt.h>
+#include <string>
+
+class Configuration
+{
+public:
+    std::string input_file = "";
+    std::string output_file = "";
+    bool debug_lexer = false;
+
+    bool valid = false;
+    Configuration(int argc, char **argv);
+};
diff --git a/src/lexer.l b/src/lexer.l
index 59bfd76..68f93b0 100644
--- a/src/lexer.l
+++ b/src/lexer.l
@@ -1,4 +1,3 @@
-
 %option reentrant noyywrap nounput
 
 %{
@@ -12,24 +11,12 @@
 
 %}
 
-	/* your definitions here */
-
-	/* your definitions end */
-
 %%
 
 %{
 	loc.step();
 %}
 
-	/* your rules here */
-
-	/* use this structure to pass the Token :
-	 * return yy::parser::make_TokenName(loc)
-	 * if the token has a type you can pass it's value
-	 * as the first argument. as an example we put
-	 * the rule to return token function.
-	 */
 
 function       	{return yy::Parser::make_FUNCTION(loc);}
 
@@ -37,10 +24,4 @@ function       	{return yy::Parser::make_FUNCTION(loc);}
 
 .				{std::cerr << loc << ": " << "token error" << std::endl; exit(1);}
 
-
-	/* if you didn't define #define yyterminate() at beginnign, you will need 
-	   this rule to match the end of file */
-    /* <<EOF>>	{return yy::Parser::make_END(loc);} */
-	/* your rules end */
-
 %%
diff --git a/src/main.cpp b/src/main.cpp
index 260c9e2..97ca6da 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,7 +1,14 @@
 #include "../build/parser.hpp"
+#include "../src/config.hpp"
 
 int main(int argc, char *argv[])
 {
+    Configuration config(argc, argv);
+    if (!config.valid)
+    {
+        std::cout << "Please provide a valid configuration\n";
+        return -1;
+    }
     Elite::ParserCtx ctx;
     return ctx.parser->parse();
 }
\ No newline at end of file
diff --git a/src/parser.y b/src/parser.y
index 092e931..b12ec70 100644
--- a/src/parser.y
+++ b/src/parser.y
@@ -1,49 +1,23 @@
-
-/* Require bison minimal version */
 %require "3.0.4"
-
-/* use newer C++ skeleton file */
-%skeleton "lalr1.cc"
-
-/* write out a header file containing the token defines */
-%defines
-
-/* namespace to enclose parser in */
-%define api.prefix {yy}
-
-/* set the parser's class identifier */
-%define api.parser.class {Parser}
-
-/* it will generate a location class which can be used in your lexer */
+%skeleton "lalr1.cc" 
+%defines 
+%define api.prefix {yy} 
+%define api.parser.class {Parser} 
 %locations
-
-/* use the constructor for each token, and make_TOKENNAME functions will be generated */
-%define api.token.constructor
-
-/* use the variant type for $1~$n and $$ those variables */
+%define api.token.constructor 
 %define api.value.type variant
-
-
 %define parse.trace
 %define parse.error verbose
 
 
 %code requires
 {
-	/* you may need these header files 
-	 * add more header file if you need more
-	 */
 #include <list>
 #include <string>
 #include <functional>
 #include "../src/ParserCtx.hpp"
-
-	/* define the sturctures using as types for non-terminals */
-
-	/* end the structures for non-terminal types */
 }
 
-
 %code
 {
 yy::Parser::symbol_type yylex(void* yyscanner, yy::location& loc);
@@ -51,10 +25,7 @@ yy::Parser::symbol_type yylex(void* yyscanner, yy::location& loc);
 
 
 %token END 0;
-
-	/* specify tokens, type of non-terminals and terminals here */
 %token FUNCTION
-	/* end of token specifications */
 
 
 /* The driver is passed by reference to the parser and to the scanner. This