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/*!
 * is-glob 
 *
 * Copyright (c) 2014-2016, Jon Schlinkert.
 * Licensed under the MIT License.
 */

var isExtglob = require('is-extglob');

module.exports = function isGlob(str) {
  if (typeof str !== 'string' || str === '') {
    return false;
  }

  if (isExtglob(str)) return true;

  var regex = /(\\).|([*?]|\[.*\]|\{.*\}|\(.*\|.*\)|^!)/;
  var match;

  while ((match = regex.exec(str))) {
    if (match[2]) return true;
    str = str.slice(match.index + match[0].length);
  }
  return false;
};