function reUncPath() {
	return /^\\\\([^\\:\|\[\]\/";<>+=,?* _]+)\\([\u0020-\u0021\u0023-\u0029\u002D-\u002E\u0030-\u0039\u0040-\u005A\u005E-\u007B\u007E-\u00FF]{1,80})(((?:\\[\u0020-\u0021\u0023-\u0029\u002D-\u002E\u0030-\u0039\u0040-\u005A\u005E-\u007B\u007E-\u00FF]{1,255})+?|)(?:\\((?:[\u0020-\u0021\u0023-\u0029\u002B-\u002E\u0030-\u0039\u003B\u003D\u0040-\u005B\u005D-\u007B]{1,255}){1}(?:\:(?=[\u0001-\u002E\u0030-\u0039\u003B-\u005B\u005D-\u00FF]|\:)(?:([\u0001-\u002E\u0030-\u0039\u003B-\u005B\u005D-\u00FF]+(?!\:)|[\u0001-\u002E\u0030-\u0039\u003B-\u005B\u005D-\u00FF]*)(?:\:([\u0001-\u002E\u0030-\u0039\u003B-\u005B\u005D-\u00FF]+)|))|)))|)$/; // eslint-disable-line no-useless-escape, no-control-regex
}
Returns a regular expression to parse a UNC path.

@returns {RegExp} regular expression

@example
var RE_UNC_PATH = reUncPath();
var bool = RE_UNC_PATH.test( '\\\\server\\share' );
// returns true

bool = RE_UNC_PATH.test( 'C:\\foo\\bar\\baz' );
// returns false