Projects

Lepl

Lepl is a parser for Python 3 (mostly backwards compatible with 2.6). Features: * Parsers are Python code, defined in Python itself. No separate grammar is necessary. * Friendly syntax using Python's operators allows grammars to be defined in a declarative ... [More] style close to BNF. * Integrated, optional lexer simplifies handling whitespace. * Built-in AST support with support for iteration, traversal and re-writing. * Generic, pure-Python approach supports parsing a wide variety of data including bytes (Python 3+ only). * Well documented and easy to extend. * Unlimited recursion depth (co-routines); memoisation; backtracking; etc - basically, it's recursive descent, done right. [Less]

ParserLab

Generate parsers with ease, using a graphical user interface, or console. Design your parsers graphically or by using standard regular expressions and BNF syntax similar to lex/yacc. Generated parsers can be in C or C++.

RXPY

RXPY is a regular expression library, written purely in Python, that is almost completely backwards compatible with the standard Python re library (only locale-based character groups are not supported). It has a modular design that allows different alphabets and engines to be used. This allows ... [More] regular expressions to be defined over sequences of arbitrary objects (a mapping between objects and the characters used in the regular expression must exist; this is defined by the alphabet). [Less]

re::engine::LPEG

With Perl 5.10, regular expression engines become pluggable. This module re::engine::LPEG supplies the Lua Parsing Expression Grammar.

Convert Regex to XML and back

This is a small library + demo that transforms a .NET regular expression into an XML string and back. It helps understanding a long regex that was written by someone else, and allows easy editing. It's is developed in .NET 3.5 C#, sources included.