refractor/lang/bison.js

Lightweight, robust, elegant virtual syntax highlighting using Prism

// @ts-nocheck
/**
 * @import {Refractor} from '../lib/core.js'
 */
import refractorC from './c.js'
bison.displayName = 'bison'
bison.aliases = []

/** @param {Refractor} Prism */
export default function bison(Prism) {
  Prism.register(refractorC)
  Prism.languages.bison = Prism.languages.extend('c', {})
  Prism.languages.insertBefore('bison', 'comment', {
    bison: {
      // This should match all the beginning of the file
      // including the prologue(s), the bison declarations and
      // the grammar rules.
      pattern: /^(?:[^%]|%(?!%))*%%[\s\S]*?%%/,
      inside: {
        c: {
          // Allow for one level of nested braces
          pattern: /%\{[\s\S]*?%\}|\{(?:\{[^}]*\}|[^{}])*\}/,
          inside: {
            delimiter: {
              pattern: /^%?\{|%?\}$/,
              alias: 'punctuation'
            },
            'bison-variable': {
              pattern: /[$@](?:<[^\s>]+>)?[\w$]+/,
              alias: 'variable',
              inside: {
                punctuation: /<|>/
              }
            },
            rest: Prism.languages.c
          }
        },
        comment: Prism.languages.c.comment,
        string: Prism.languages.c.string,
        property: /\S+(?=:)/,
        keyword: /%\w+/,
        number: {
          pattern: /(^|[^@])\b(?:0x[\da-f]+|\d+)/i,
          lookbehind: true
        },
        punctuation: /%[%?]|[|:;\[\]<>]/
      }
    }
  })
}