Harp, or haskell regular patterns, is a haskell extension that extends the normal pattern matching facility, allowing the user to match against regular expressions. this expressive power is highly useful in a wide range of areas, including text parsing and xml processing. regular expression patterns in harp work over ordinary haskell lists ([]) of arbitrary type. harp is implemented as a pre-processor to ordinary haskell.

this package provides a library for the haskell programming language. see http://www.haskell.org/ for more information on haskell.