parsing

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Haskell, 10.12

http://users.info.unicaen.fr/~karczma/matrs/Fuprog/10.12.html Exercice.

Packrat Parsing: a Practical Linear-Time Algorithm with Backtracking

Abstract Packrat parsing is a novel and practical method for implementing linear-time parsers for grammars defined in Top-Down Parsing Language (TDPL). http://pdos.csail.mit.edu/~baford/packrat/thesis/
http://matthewmanela.com/blog/writing-a-regular-expression-parser-in-haskell-part-2/

Haskell - Writing a Regular Expression parser in Haskell: Part 2 - Matthew Manela - Farblondzshet in Code

The first module in my simple regular expression parse is called RegexToNFA. This module exposes the types that make up a finite state machine and also the functions to convert a regular expression string into a finite state machine.

A simple regex engine in Haskell

UPDATE: sorear from #haskell pasted a cool version of this here . http://jcreigh.blogspot.com/2006/12/simple-regex-engine-in-haskell.html
http://www.hackification.com/2010/11/30/reading-haskell-part-4/

Rediscover the Joy of Coding :: Reading Haskell – Part 4

In the last three articles I covered the overall structure, lexer, and parser of a simple expression evaluator. This articles concludes by presenting the evaluator and main loop. At this stage we are able to take a string, tokenize it, and then build a tree representing the expression.
http://community.haskell.org/~ndm/tagsoup/

Neil Mitchell - TagSoup

TagSoup is a library for parsing HTML/XML.