refractor/lang/racket.js

Lightweight, robust, elegant virtual syntax highlighting using Prism

// @ts-nocheck
/**
 * @import {Refractor} from '../lib/core.js'
 */
import refractorScheme from './scheme.js'
racket.displayName = 'racket'
racket.aliases = ['rkt']

/** @param {Refractor} Prism */
export default function racket(Prism) {
  Prism.register(refractorScheme)
  Prism.languages.racket = Prism.languages.extend('scheme', {
    'lambda-parameter': {
      // the racket lambda syntax is a lot more complex, so we won't even attempt to capture it.
      // this will just prevent false positives of the `function` pattern
      pattern: /([(\[]lambda\s+[(\[])[^()\[\]'\s]+/,
      lookbehind: true
    }
  })
  Prism.languages.insertBefore('racket', 'string', {
    lang: {
      pattern: /^#lang.+/m,
      greedy: true,
      alias: 'keyword'
    }
  })
  Prism.languages.rkt = Prism.languages.racket
}