reprism/src/languages/reason.js

Modular Syntax highlighting for the web

export default {
  language: 'reason',
  init: Prism => {
    Prism.languages.reason = Prism.languages.extend('clike', {
      comment: {
        pattern: /(^|[^\\])\/\*[\s\S]*?\*\//,
        lookbehind: true,
      },
      string: {
        pattern: /"(?:\\(?:\r\n|[\s\S])|[^\\\r\n"])*"/,
        greedy: true,
      },
      // 'class-name' must be matched *after* 'constructor' defined below
      'class-name': /\b[A-Z]\w*/,
      keyword: /\b(?:and|as|assert|begin|class|constraint|do|done|downto|else|end|exception|external|for|fun|function|functor|if|in|include|inherit|initializer|lazy|let|method|module|mutable|new|nonrec|object|of|open|or|private|rec|sig|struct|switch|then|to|try|type|val|virtual|when|while|with)\b/,
      operator: /\.{3}|:[:=]|=(?:==?|>)?|<=?|>=?|[|^?'#!~`]|[+\-*\/]\.?|\b(?:mod|land|lor|lxor|lsl|lsr|asr)\b/,
    })
    Prism.languages.insertBefore('reason', 'class-name', {
      character: {
        pattern: /'(?:\\x[\da-f]{2}|\\o[0-3][0-7][0-7]|\\\d{3}|\\.|[^'\\\r\n])'/,
        alias: 'string',
      },
      constructor: {
        // Negative look-ahead prevents from matching things like String.capitalize
        pattern: /\b[A-Z]\w*\b(?!\s*\.)/,
        alias: 'variable',
      },
      label: {
        pattern: /\b[a-z]\w*(?=::)/,
        alias: 'symbol',
      },
    })

    // We can't match functions property, so let's not even try.
    delete Prism.languages.reason.function
  },
}