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a friendly yet powerful LR-parser written in Python

Project description

Plyplus is a general-purpose parser built on top of PLY (http://www.dabeaz.com/ply/), written in python, with a slightly different approach to parsing.

Most parsers work by calling a function for each rule they identify, which processes the data and returns to the parser. Plyplus parses the entire file into a parse-tree, letting you search and process it using visitors and pattern-matching.

Plyplus makes two uncommon separations: of code from grammar, and of processing from parsing. The result of this approach is (hopefully) a cleaner design, more powerful grammar processing, and a parser which is easier to write and to understand.

Features:

  • Automatically builds an AST. Customizable in grammar (expand and flatten nodes automatically)
  • Selectors: run powerful queries on the AST
  • Rule operators mimicking regular expressions (supported: parentheses, ‘|’, ‘*’, ‘?’, and ‘+’)
  • Comes with a full, flexible, Python grammar
  • Nested grammars (a grammar within a grammar. Useful for HTML/CSS, for example)
  • Automatic line counting
  • From PLY: Readable errors, Debug mode
  • And more! …

Project details


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Filename, size & hash SHA256 hash help File type Python version Upload date
PlyPlus-0.7.5.tar.gz (233.2 kB) Copy SHA256 hash SHA256 Source None Feb 7, 2017

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