lechimp-p / dicto.php

     * @return  Iterator<[Node,mixed]>

     */

    protected function run_expand(\Iterator $nodes, \Closure $clsr) {

        while ($nodes->valid()) {

            list($node, $result) = $nodes->current();

            // TODO: let closure return an Iterator too.

            foreach($clsr($node) as $new_node) {

                yield [$new_node, $result];

            }

            $nodes->next();

        }

    }

    /**

     */

    protected function run_filter(\Iterator $nodes, Predicate $predicate) {

        $clsr = $predicate->compile();

        while ($nodes->valid()) {

            $val = $nodes->current();

            list($node, $result) = $val;

            if ($clsr($node, $result)) {

                yield $val;

            }

            $nodes->next();

        }

    }

    /**