Extracted from Pike v7.8 release 866 at 2016-11-06.
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Parser
Parser.XML
Parser.XML.Tree
Parser.XML.Tree.AbstractSimpleNode

Methods
 `[]()
 add_child()
 add_child_after()
 add_child_before()
 clone()
 count_children()
 get_children()
 get_descendants()
 get_last_child()
 iterate_children()
 low_clone()
 remove_child()
 replace_child()
 replace_children()
 walk_inorder()
 walk_postorder()
 walk_preorder()
 walk_preorder_2()
 zap_tree()
previousParser.XML.Tree.AbstractSimpleNode()->walk_preorder()
Parser.XML.Tree.AbstractSimpleNode()->zap_tree()next

Method Parser.XML.Tree.AbstractSimpleNode()->walk_preorder_2()

Method walk_preorder_2

int walk_preorder_2(function(AbstractSimpleNode:int|void) cb_1, function(AbstractSimpleNode:int|void) cb_2, mixed ... args)

Description

Traverse the node subtree in preorder, root node first, then subtrees from left to right. For each node we call cb_1 before iterating through children, and then cb_2 (which always gets called even if the walk is aborted earlier). If the callback function returns STOP_WALK the traverse decend is aborted and STOP_WALK is returned once all waiting cb_2 functions have been called.