# Cat article at CodeProject.com

## Christopher Diggins — 2006-11-04 20:47:31

    I just recently posted the most recent  C# source code for the Cat

    interpreter (version 0.9.6) to CodeProject.com (

    http://www.codeproject.com/useritems/cat.asp ) along with an article

    which explains how the interpreter and type inference algorithm is

    implemented. CodeProject.com is a popular site for C++, C#, and VB

    developers and contains lots of open source code and interesting

    articles.

    The goal of the article is to help people extend or modify Cat for

    their own purposes. The Cat code base is public domain, which I want

    to point out is very rare for programming languages. This means that

    Cat can be easily used for commercial purposes without any

    restrictions or requirement whatsoever.

    For those interested, there is a flag now in the source code, which

    can be used to turn off static checking effectively creating a new

    dialect of Cat called Kitten. Kitten has no type checking, and thus

    allows a wider range of programs. Kitten is even closer to the Joy

    programming language than Cat, and I would be interested to see if

    anyone wants to modify the Cat source to enable a Joy compatbility

    mode, or simply write a Joy interpreter. (hint: the easiest way is to

    wrap the Cat interpreter with a Joy to Kitten translator).

    On the subject of Joy compatibility, what level of interest would

    there be in a complete Joy interpreter in C#? Also Is anyone doing any

    commercial or academic work on or with Joy? I ask because I was

    wondering if there were any career opportunities working on or with

    Joy or similar languages.

    I hope the article and source code is of some use to you. I'd love to

    hear about any projects which manage to use some of the source code I

    provide, or some of the ideas in the Cat language.

    Christopher Diggins

    http://www.cat-language.com