refractor/lang/rescript.js

Lightweight, robust, elegant virtual syntax highlighting using Prism

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

/** @param {Refractor} Prism */
export default function rescript(Prism) {
  Prism.languages.rescript = {
    comment: {
      pattern: /\/\/.*|\/\*[\s\S]*?(?:\*\/|$)/,
      greedy: true
    },
    char: {
      pattern: /'(?:[^\r\n\\]|\\(?:.|\w+))'/,
      greedy: true
    },
    string: {
      pattern: /"(?:\\(?:\r\n|[\s\S])|[^\\\r\n"])*"/,
      greedy: true
    },
    'class-name': /\b[A-Z]\w*|@[a-z.]*|#[A-Za-z]\w*|#\d/,
    function: {
      pattern: /[a-zA-Z]\w*(?=\()|(\.)[a-z]\w*/,
      lookbehind: true
    },
    number:
      /(?:\b0x(?:[\da-f]+(?:\.[\da-f]*)?|\.[\da-f]+)(?:p[+-]?\d+)?|(?:\b\d+(?:\.\d*)?|\B\.\d+)(?:e[+-]?\d+)?)[ful]{0,4}/i,
    boolean: /\b(?:false|true)\b/,
    'attr-value': /[A-Za-z]\w*(?==)/,
    constant: {
      pattern: /(\btype\s+)[a-z]\w*/,
      lookbehind: true
    },
    tag: {
      pattern: /(<)[a-z]\w*|(?:<\/)[a-z]\w*/,
      lookbehind: true,
      inside: {
        operator: /<|>|\//
      }
    },
    keyword:
      /\b(?:and|as|assert|begin|bool|class|constraint|do|done|downto|else|end|exception|external|float|for|fun|function|if|in|include|inherit|initializer|int|lazy|let|method|module|mutable|new|nonrec|object|of|open|or|private|rec|string|switch|then|to|try|type|when|while|with)\b/,
    operator:
      /\.{3}|:[:=]?|\|>|->|=(?:==?|>)?|<=?|>=?|[|^?'#!~`]|[+\-*\/]\.?|\b(?:asr|land|lor|lsl|lsr|lxor|mod)\b/,
    punctuation: /[(){}[\],;.]/
  }
  Prism.languages.insertBefore('rescript', 'string', {
    'template-string': {
      pattern:
        /`(?:\\[\s\S]|\$\{(?:[^{}]|\{(?:[^{}]|\{[^}]*\})*\})+\}|(?!\$\{)[^\\`])*`/,
      greedy: true,
      inside: {
        'template-punctuation': {
          pattern: /^`|`$/,
          alias: 'string'
        },
        interpolation: {
          pattern:
            /((?:^|[^\\])(?:\\{2})*)\$\{(?:[^{}]|\{(?:[^{}]|\{[^}]*\})*\})+\}/,
          lookbehind: true,
          inside: {
            'interpolation-punctuation': {
              pattern: /^\$\{|\}$/,
              alias: 'tag'
            },
            rest: Prism.languages.rescript
          }
        },
        string: /[\s\S]+/
      }
    }
  })
  Prism.languages.res = Prism.languages.rescript
}