tree-sitter-scheme

Scheme grammar for tree-sitter.

Recent News

• With R7RS support, a single | can no longer appears in the middle of an identifier.
• The nodes directive no longer contain sub nodes symbol. Now it's a single node.
• some extensions added, see below

Status

~~tree-sitter-scheme should work on a superset of Scheme.~~

Different Implementations might have conflict grammar. I am not sure if I should support them. If you need some implementation-specific features, please open an issue, then I will consider support it.

current status:

• [x] R5RS
• [x] R6RS
• [x] R7RS
• [ ] Extensions
  • [x] {} as replacement for () or []
  • [x] extend symbols which can start with digits, period, ... etc as long as it's not a number
  • [x] keyword #:symbol
  • [x] escape sequence in string \ + any character
  • [x] characters #\bel, #\ls, #\nel, #\rubout, #\vt

Please open an issue to let me know it's really used if you want to add new extensions.

Implementation

• [ ] Support for implementation
  • [ ] Chez Scheme (#1)
  • [ ] Chicken Scheme (#3)
  • [ ] Guile Scheme (#7)

Usage

See nodes.md for all visible nodes.

This parser don't parse language constructs. Instead, it parse code as lists.

If you want language constructs support, use custom queries (see #5), also see thchha/tree-sitter-scheme.

Query

The queries here are too simple and not intended to be useful in an editor. Please open an issue if you have suggestions.

Reference

Scheme

• R5RS
• R6RS
• R7RS
• The Scheme Programming Language

Tree-sitter

• official documents
• Guide to your first Tree-sitter grammar
• tree-sitter-clojure
• tree-sitter-commonlisp
• tree-sitter-fennel