PegParser

Using PetitParser2 to parse PEGs, with a view to automatically generating parsers to parse the grammars they describe

Installing PegParser

I haven't worked out how to manage Metacello, so ... But this seems to work in a fresh image, it pulls in PP2 first

Metacello new
  baseline: 'PegParser';
  repository: 'github://johnhwoods/PegParser/src';
  load.

The comment for PegHandParser is a valid PEG - it is the PEG that defines PEGS with some additional PEG (ie #...) comments. So the raw parse can be obtain by inspecting the result of PegHandParser new parse: PegHandParser comment. Further processing of the AST is performed by the subclass PegHandEvaluator although at the moment this is just a few methods that flatten some of the ASTs.

Next Steps

• Extensions to automagically create parsers from PEGs, rather than just parsing them

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