PowerShell support for tree-sitter

A tree-sitter implemenation for PowerShell.

License

See LICENSE.

Initial goal

Parse the big test file from EditorSyntax completely.

TODO

• Add tree-sitter tests
• Add support for more syntax:
  • Statements
    • switch
    • filter
    • using
    • throw
    • for
    • foreach
    • do/while/until
    • exit/return
    • break/continue
    • trap
    • try/catch/finally
    • data
    • workflow/parallel/sequence
    • configuration
  • Expressions
    • -not
    • Unary -
    • -ge,-gt,-le,-lt,-eq,-ne,-ceq,-ieq, etc.
    • +,-,*,/,%,-or,-and,-bor,-band, etc.
    • Element access ($x[$i])
  • Other syntax
    • Labels
    • Better whitespace handling
    • Herestrings
    • #requires
    • #sig
    • Pipeline redirection and jobs
    • Splatting
    • &&/||
• Investigate possibility of dynamic keyword support

End goal

90%+ compatibility with the PowerShell parser today.

Getting started

1. npm install
2. npm start file.ps1

If you want to just generate the parser, run npm run generate.

If you want to just parse a script, run npm run parse file.ps1