Skip to main content
Join the official 2019 Python Developers SurveyStart the survey!

Lexer and GLR parser generator

Project description

PyGgy is a python package for generating parsers and lexers in python. The PyGgy distribution contains two tools:

PyLly - (Pronounced “pile-ey”) A lexer generator that generates
DFA tables for lexing tokens.
PyGgy - (Pronounced “piggy”) A parser generator that generates
SLR tables for a GLR parsing engine.

The PyLly program is used to pregenerate tables for a finite state machine from a lexer specification. There is a lexer engine that uses the tables to tokenize an input stream.

The PyGgy program is used to pregenerate parser tables from a parser specification. There is a GLR parsing engine that uses the tables to parse a stream of input tokens. Because GLR parsing is used, the parser can deal with arbitrary grammars, even if they are recursive or ambiguous.

Project details


Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN SignalFx SignalFx Supporter DigiCert DigiCert EV certificate StatusPage StatusPage Status page