/** Creates new Matcher that executes $this matcher and if nothing is found
* (results is null or empty array), executes second matcher. */
function orElse($m)
{
$self = $this->f;
return new Matcher(function ($node, $context = null) use($self, $m) {
$context = Matcher::inventContext($context);
return $self($node, $context) ?: Matcher::_evalPath($node, $m, $context);
});
}
