function createRegExp() {
	/*
	* Regular expression for splitting a path into two components: a subdirectory path and a basename (filter).
	*
	* ## Examples
	*
	* -   `''`
	* -   `'.'`
	* -   `'./'`
	* -   `'..'`
	* -   `'../'`
	* -   `'foo/bar'`
	* -   `'./foo'`
	* -   `'./foo/bar`
	*
	* Regular expression: `/([\w@./-]+\/)?([\w@./-]*)/`
	*
	* -   `(`
	*     -   begin capture (1)
	* -   `[\w@./-]+\/`
	*     -   subdirectory path characters
	* -   `)`
	*     -   end capture (1)
	* -   `?`
	*     -   match zero or one time
	* -   `(`
	*     -   begin capture (2)
	* -   `[\w@./-]*`
	*     -   zero or more basename path characters
	* -   `)`
	*     -   end capture (2)
	*/
	return /([\w@./-]+\/)?([\w@./-]*)/;
}
Returns a regular expression for splitting a path into two components: a subdirectory path and a basename (filter).

@private
@returns {RegExp} regular expression