Prism.languages.erlang = {
  comment: /%.+/,
  string: {
    pattern: /"(?:\\.|[^\\"\r\n])*"/,
    greedy: true,
  },
  'quoted-function': {
    pattern: /'(?:\\.|[^\\'\r\n])+'(?=\()/,
    alias: 'function',
  },
  'quoted-atom': {
    pattern: /'(?:\\.|[^\\'\r\n])+'/,
    alias: 'atom',
  },
  boolean: /\b(?:true|false)\b/,
  keyword: /\b(?:fun|when|case|of|end|if|receive|after|try|catch)\b/,
  number: [
    /\$\\?./,
    /\d+#[a-z0-9]+/i,
    /(?:\b\d+\.?\d*|\B\.\d+)(?:e[+-]?\d+)?/i,
  ],
  function: /\b[a-z][\w@]*(?=\()/,
  variable: {
    // Look-behind is used to prevent wrong highlighting of atoms containing "@"
    pattern: /(^|[^@])(?:\b|\?)[A-Z_][\w@]*/,
    lookbehind: true,
  },
  operator: [
    /[=\/<>:]=|=[:\/]=|\+\+?|--?|[=*\/!]|\b(?:bnot|div|rem|band|bor|bxor|bsl|bsr|not|and|or|xor|orelse|andalso)\b/,
    {
      // We don't want to match <<
      pattern: /(^|[^<])<(?!<)/,
      lookbehind: true,
    },
    {
      // We don't want to match >>
      pattern: /(^|[^>])>(?!>)/,
      lookbehind: true,
    },
  ],
  atom: /\b[a-z][\w@]*/,
  punctuation: /[()[\]{}:;,.#|]|<<|>>/,
};
