tree-sitter-fsharp

F# grammars for tree-sitter, packaged for Python.

The package ships two parsers:

Function	Grammar	File types
`language()`	implementation files	`.fs`, `.fsx`
`language_signature()`	signature files	`.fsi`

Installation

pip install tree-sitter-fsharp tree-sitter

Requires Python 3.10 or later. The tree-sitter runtime (~=0.24) is an optional dependency, also installable as an extra:

pip install "tree-sitter-fsharp[core]"

Wheels are published for the common platforms; other platforms build the extension from the bundled C sources, which needs a C11 compiler.

Usage

from tree_sitter import Language, Parser
import tree_sitter_fsharp

parser = Parser(Language(tree_sitter_fsharp.language()))

tree = parser.parse(b"let x = 1\n")
print(tree.root_node)

Signature files need the other grammar — it is a separate parser, not a mode of the first:

parser = Parser(Language(tree_sitter_fsharp.language_signature()))
tree = parser.parse(b"module M\nval x : int\n")

Queries

Highlight, injection, locals and tags queries ship inside the package and are exposed as lazily-read module attributes holding the query source (each is None when that query file is absent):

import tree_sitter_fsharp

source = tree_sitter_fsharp.HIGHLIGHTS_QUERY

Available: HIGHLIGHTS_QUERY, INJECTIONS_QUERY, LOCALS_QUERY and TAGS_QUERY for the implementation grammar, plus SIGNATURE_HIGHLIGHTS_QUERY and SIGNATURE_TAGS_QUERY for the signature grammar.

Type stubs (py.typed, __init__.pyi) are included.

Contributing and grammar development

Grammar sources, the test corpus and the development workflow live in the repository: see the main README and AGENTS.md. Bug reports for mis-parsed F# code are welcome — reduce the snippet to a minimal example and open an issue or PR.

License

MIT — see LICENSE.

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tree_sitter_fsharp-0.3.11.tar.gz (4.2 MB view details)

Uploaded Jul 30, 2026 Source

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tree_sitter_fsharp-0.3.11-cp310-abi3-win_arm64.whl (1.3 MB view details)

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Uploaded Jul 30, 2026 CPython 3.10+manylinux: glibc 2.17+ ARM64manylinux: glibc 2.28+ ARM64

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Release history Release notifications | RSS feed

This release

0.3.11

Jul 30, 2026

0.3.10

Jul 29, 2026

0.3.8

Jul 29, 2026

0.3.7

Jul 29, 2026

0.3.6

Jul 29, 2026

0.3.5

Jul 29, 2026

0.3.4

Jul 29, 2026

0.3.3

Jul 27, 2026

0.3.2

Jul 27, 2026

tree-sitter-fsharp 0.3.11

tree-sitter-fsharp

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