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Syntax highlighting with language autodetection.

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/*
Language: Batch file (DOS)
Author: Alexander Makarov 
Contributors: Anton Kochkov 
Website: https://en.wikipedia.org/wiki/Batch_file
Category: scripting
*/

/** @type LanguageFn */
function dos(hljs) {
  const COMMENT = hljs.COMMENT(
    /^\s*@?rem\b/, /$/,
    { relevance: 10 }
  );
  const LABEL = {
    className: 'symbol',
    begin: '^\\s*[A-Za-z._?][A-Za-z0-9_$#@~.?]*(:|\\s+label)',
    relevance: 0
  };
  const KEYWORDS = [
    "if",
    "else",
    "goto",
    "for",
    "in",
    "do",
    "call",
    "exit",
    "not",
    "exist",
    "errorlevel",
    "defined",
    "equ",
    "neq",
    "lss",
    "leq",
    "gtr",
    "geq"
  ];
  const BUILT_INS = [
    "prn",
    "nul",
    "lpt3",
    "lpt2",
    "lpt1",
    "con",
    "com4",
    "com3",
    "com2",
    "com1",
    "aux",
    "shift",
    "cd",
    "dir",
    "echo",
    "setlocal",
    "endlocal",
    "set",
    "pause",
    "copy",
    "append",
    "assoc",
    "at",
    "attrib",
    "break",
    "cacls",
    "cd",
    "chcp",
    "chdir",
    "chkdsk",
    "chkntfs",
    "cls",
    "cmd",
    "color",
    "comp",
    "compact",
    "convert",
    "date",
    "dir",
    "diskcomp",
    "diskcopy",
    "doskey",
    "erase",
    "fs",
    "find",
    "findstr",
    "format",
    "ftype",
    "graftabl",
    "help",
    "keyb",
    "label",
    "md",
    "mkdir",
    "mode",
    "more",
    "move",
    "path",
    "pause",
    "print",
    "popd",
    "pushd",
    "promt",
    "rd",
    "recover",
    "rem",
    "rename",
    "replace",
    "restore",
    "rmdir",
    "shift",
    "sort",
    "start",
    "subst",
    "time",
    "title",
    "tree",
    "type",
    "ver",
    "verify",
    "vol",
    // winutils
    "ping",
    "net",
    "ipconfig",
    "taskkill",
    "xcopy",
    "ren",
    "del"
  ];
  return {
    name: 'Batch file (DOS)',
    aliases: [
      'bat',
      'cmd'
    ],
    case_insensitive: true,
    illegal: /\/\*/,
    keywords: {
      keyword: KEYWORDS,
      built_in: BUILT_INS
    },
    contains: [
      {
        className: 'variable',
        begin: /%%[^ ]|%[^ ]+?%|![^ ]+?!/
      },
      {
        className: 'function',
        begin: LABEL.begin,
        end: 'goto:eof',
        contains: [
          hljs.inherit(hljs.TITLE_MODE, { begin: '([_a-zA-Z]\\w*\\.)*([_a-zA-Z]\\w*:)?[_a-zA-Z]\\w*' }),
          COMMENT
        ]
      },
      {
        className: 'number',
        begin: '\\b\\d+',
        relevance: 0
      },
      COMMENT
    ]
  };
}

export { dos as default };