Patty

Introduction

Patty is a small library that facilitates working with functional data structures. It consists of a few macros and metaclasses that integrate nicely with CLOS. Code using patty is similar in style to Haskell code using algebraic data types, primitive pattern matching and type classes.

Mailing Lists

patty-devel: For developers, bug reports and general discussion.
patty-announce: Announcements for new releases, low volume.

Download

The latest release is 1.0.6. Download gzipped tarball.
It depends on closer-mop, moptilities and Alexandria. LIFT and cl-ppcre are only needed to run the test suite (only the patty-test system depends on them).
Alternatively you can install via asdf-install (with the caveat that Alexandria is currently not asdf-installable).

You can get the latest via darcs:

    darcs get http://common-lisp.net/project/patty/darcs/patty

News

2007-04-07
Release patty 1.0.6. Previously, slot names were generated with gensym during defdata-* expansion. This turned out to be rather dumb, especially for interactive development. So now the slot names are the same as the reader method names, but wrapped in angle brackets. This release also fixes a bug in a MOP utility function.
2007-03-25
Release patty 1.0.4. Patty utilizes the MOP now for internal type information bookkeeping. This fixes some incremental compilation and interactive development issues.
2007-03-04
There's some documentation now!
2007-03-04
Release patty 1.0.2. The only library change is that all slots defined via one of the defdata-* macros have an :initform that signals an error.
Strictly speaking, this is not backwards compatible, but since 1.0.0 is only one day old, no docs are up and this was an oversight in the first place, I think it won't hurt anybody.
BTW, I hope to put up some docs today.
2007-03-03
Upload home page, darcs repository and release patty 1.0.0!

Acknowledgements

Patty uses the abstract-class and singleton-class definitions from Tim Bradshaw's Lisp hacks.

Project members

Stefan Lang