A Strafunski application letter
Strafunski is a Haskell-centred software bundle for implementing language processing components~---~most notably program analyses and transformations. Typical application areas include program optimisation, refactoring, software metrics, software re- and reverse engineering. Strafunski started out as generic programming library complemented by generative tool support to address the concern of generic traversal over typed representations of parse trees in a scalable manner. Meanwhile, Strafunski also encompasses means of integrating external components such as parsers, pretty printers, and graph visualisation tools. In a selection of case studies, we demonstrate that typed functional programming in Haskell, augmented with Strafunski's support for generic traversal and external components, is very appropriate for the development of practical language processors. In particular, we discuss using Haskell for Cobol reverse engineering, Java code metrics, and Haskell re-engineering.