freebsd-ports/lang/freetxl/pkg-descr

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TXL is a unique programming language specifically designed to support computer
software analysis and source transformation tasks. It is the evolving result
of more than fifteen years of concentrated research on rule-based structural
transformation as a paradigm for the rapid solution of complex computing
problems.
The TXL programming language is a hybrid functional / rule-based language with
unification, implied iteration and deep pattern match.
Each TXL program has two components:
* A Description of the Structures to be Transformed
Specified as an EBNF grammar, in context-free ambiguous form.
* A Set of Structural Transformation Rules
Specified by example, using pattern/replacement pairs.
WWW: http://www.txl.ca/
- Ryan Thompson <ryan@sasknow.com>