ULex - A lexical analyzer generator
| ULex is a java application that generates java code for lexical analyzers.
The current version could be better, but it seems to work. To render this
probable, I have written a lexer file for a subset of the java language
- check it out here: java_lex.txt. It generates
a lexer that prints out a list of tokes to the console, given a java source
file as the first parameter. The generated code can be found here: JavaLexer.java
(200-250 kb - yes, no minimization ;-) ).
ULex only generates 7 bit lexers.
To use ULex, download this file, unzip and run install.bat (non-windows users: you are on your own). ULex should run on all machines that has a Java virtual machine. The generated lexer implements the java_cup.runtime.Scanner interface - i.e. it generates a class definition that includes the method java_cup.runtime.Symbol next_token(). I have NOT tested with the javacup parser. You can find info on the javacup parser at http://www.cs.princeton.edu/~appel/modern/java/CUP/why.html. I have included the source and class files for Scanner and Symbol in the ULex distribution. ulex_0_2.zip : The 0.2 version of ULex
You need a java compiler( at least 1.1 ) and a Java VM ( at least 1.2 ) to use ULex. You can find both here: http://java.sun.com/j2se TODO:
Write a decent manual Minimize DFAs
All programming by Ulrik Magnusson |