https://github.com/jig/scanner

Lisp source code scanner
https://github.com/jig/scanner

go golang lisp tinygo

Last synced: 30 days ago
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Lisp source code scanner

• Host: GitHub
• URL: https://github.com/jig/scanner
• Owner: jig
• License: bsd-3-clause
• Created: 2022-08-21T16:19:01.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2022-08-27T08:45:53.000Z (over 2 years ago)
• Last Synced: 2024-11-13T08:15:22.836Z (3 months ago)
• Topics: go, golang, lisp, tinygo
• Language: Go
• Homepage:
• Size: 144 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# jig/scanner

Lisp lexer (scanner) implemented in GO used by [`jig/lisp`](https://github.com/jig/lisp) and [`jig/tinylisp`](https://github.com/jig/tinylisp)

Code adapted from the Go `text/scanner` standard package, and mostly compatible with it (beside the fact this is for Lisp and that is for Go syntax).

Major differences:

- identifier allowed characters is more expansive than Go is (e.g. `+`, `-`, `*host-name*`, or `<=` are valid identifiers)

- negative integers or negative floats are supported as a single token (of type `Int` or `Float` respectively)

- character tokens are not supported anymore (e.g. `'A'`) as `'` is used as synonym of `quote`

- parsing errors are not printed to `os.Stdout` by default

- raw strings in `jig/lisp` are quoted with `¬` character (instead of `` ` ``) as `` ` `` is used as synonym of `quasiquote`. Raw strings might include `¬` by doublind them `¬¬`

- `#{` is specially handled to support Lisp set literals

- `~`, `@` and `~@` are specially handled to support them as synonyms of `unquote`, `deref` and `splice-unquote` respectively

- support of Lisp keywords (e.g. `:key`) as a single token of type `Keyword`

# Documentation

See [pkg.go.dev/jig/scanner](https://pkg.go.dev/github.com/jig/scanner)