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tree-sitter-qsharp

v0.1.2

Published

Q# grammar for tree-sitter

Vulnerabilities

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Links

Git

Maintainers

bezpechnobezpechno

Keywords

tree-sitterqsharpq#quantumparser

Readme

tree-sitter-qsharp

A tree-sitter grammar for Q#, Microsoft's quantum programming language.

This is a new project, not affiliated with Microsoft or the tree-sitter organization. Feedback, bug reports, and contributions are welcome.

What it does

Parses Q# source files into a concrete syntax tree that editors can use for syntax highlighting, code folding, symbol navigation, and indentation.

Built by reading the Q# language reference and the Q# compiler source. Tested against Q# files in the microsoft/qsharp repository.

Supported constructs

  • Namespaces, imports, exports, open directives
  • Operations and functions with type parameters, functor clauses, specializations
  • Structs, newtypes, all builtin types
  • Full expression grammar with operator precedence per the official specification
  • Quantum-specific syntax: use/borrow, within/apply, repeat/until/fixup, Adjoint/Controlled
  • All literals: int, bigint, float, imaginary, string, interpolated string, bool, Result, Pauli
  • External scanner for float/range disambiguation (1. vs 0..5)

Known limitations

  • Explicit type arguments on calls (Foo<Int>(x)) are not supported due to </> ambiguity with comparison operators. Q# type inference handles this in practice.
  • Open-ended step ranges (...2...) parse but the AST does not perfectly represent all range component positions.
  • This is a v0.x project. There may be edge cases that are not yet covered.

Editor query files

| Feature | File | |---|---| | Syntax highlighting | queries/highlights.scm | | Code folding | queries/folds.scm | | Symbol outline | queries/tags.scm | | Auto-indentation | queries/indents.scm | | Scope tracking | queries/locals.scm | | Text objects | queries/textobjects.scm |

Capture names follow the nvim-treesitter conventions.

Contributing

If you find Q# code that doesn't parse correctly, please open an issue with the .qs file or a minimal reproducing snippet. Pull requests are welcome.

References

License

MIT