https://github.com/tijn/coolj

an LL-parser builder for Ruby
https://github.com/tijn/coolj

Last synced: 6 days ago
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an LL-parser builder for Ruby

• Host: GitHub
• URL: https://github.com/tijn/coolj
• Owner: tijn
• Created: 2010-10-17T21:16:05.000Z (about 14 years ago)
• Default Branch: master
• Last Pushed: 2010-10-25T22:22:04.000Z (about 14 years ago)
• Last Synced: 2024-04-21T03:59:45.007Z (7 months ago)
• Language: Ruby
• Homepage:
• Size: 97.7 KB
• Stars: 1
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.markdown

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README

        
coolj

=====

a simple LL-parser builder

This library should eventually replace topdown (this other parser builder I once wrote). It should be simpler and faster.

Since I mainly intend to use this library to base specialised parsers upon for reading all sorts of data formats, and because writing a BNF-parser is not really complex I think it is a good idea to take some shortcuts (to keep things simple and fast):

  - I am not defining an AST

  - I don't have a separate lexer and parser, in a way the lexer could be said to exist in the first two or three case/when-blocks of the parser

  - the amount of whitespace between tokens can be significant, just be sensible in writing your BNF and it won't bite you (really!)

  - the idea is that your BNF is compiled (read: translated) to Ruby code. Small parser-methods are defined on your class (easy to override or hook into) that together form a parser for a complete grammar.

  

That's it for now, more later. Good luck, have fun, use the source and send me your patches! (please)