refractor/lang/erlang.js

Lightweight, robust, elegant virtual syntax highlighting using Prism

'use strict';

module.exports = erlang;
erlang.displayName = 'erlang';
erlang.aliases = [];
function erlang(Prism) {
  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+([Ee][+-]?\d+)?\b/],
    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: /[()[\]{}:;,.#|]|<<|>>/
  };
}