LexerParserPython

This is a simple java-cup parser for Python 2.7 programs, It shows the sintax abstract tree of your python program. There are two main parts:

-The Lexer (Jflex: http://www.jflex.de)

-The Parser (Java-Cup: http://www.cs.princeton.edu/~appel/modern/java/CUP/)

Compile

On first usage:

 javac com/mxgraph/*/*.java
 javac java_cup/runtime/*.java

In order to modify something in the Lexer you will need to download Jflex and execute the command:

jflex python.jflex

To modify the Parser and compile everything you will need to execute:

java -jar java-cup-11a.jar -expect 1000 -interface -parser Parser python.cup
javac -cp "java-cup-11a.jar:jgraphx.jar" *.java

Usage

Lexer:

syrion:LexerParserPython syrion$ java PythonLexerTest input.py 
< IDENT ,a>  at line 0, column 0
< EQ >  at line 0, column 2
< STRING ,'Hello World'>  at line 0, column 16
< NEWLINE >  at line 0, column 17
< PRINT >  at line 1, column 0
< IDENT ,a>  at line 1, column 6

Parser:

syrion:LexerParserPython syrion$ java Parser input.py
Start:


Finish
Python_program 
	|_= 
	|_	|_a 
	|_	|_'Hello World' 
	|_Print 
	|_	|_a