Compatible with  IntelliJ IDEA
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BNF Grammars and JFlex lexers editor. Readable parser/PSI code generator.

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Recent change notes

  • Generator: grammar analysis and expression parsing fixes
  • Generator: include quoted tokens in token sequences
Full change log...

General usage instructions

1. Create grammar *.bnf file, see grammars/Grammar.bnf in the plugin code

2. Tune the grammar using Live Preview + Structure view (ctrl-alt-P / meta-alt-P)

3. Generate parser/ElementTypes/PSI classes (ctrl-shift-G / meta-shift-G)

4. Generate lexer *.flex file and then run JFlex generator (both via context menu)

5. Implement ParserDefinition and add the corresponding registrations to the plugin.xml

6. Mix-in resolve and other non-trivial functionality to PSI
Could you extend it EBNF grammar?
Thanks for this great plugin! It makes development of custom language parsers so much easier!
Very helpful.
Thank you. Left-recursion detection is added to 1.0.1 version.
Thanks for the plugin, it's a very helpful plugin to simplify the development of custom parsers.
The generator accepts left-recursive rules, which do not make sense in PEG parsers (afaik). Is it possible to highlight this type of rules in the .bnf editor?
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