Package com.google.javascript.jscomp

Class NodeTraversal.AbstractPreOrderCallback

java.lang.Object

com.google.javascript.jscomp.NodeTraversal.AbstractPreOrderCallback

All Implemented Interfaces:

NodeTraversal.Callback

Direct Known Subclasses:

CheckEs6ModuleFileStructure, Es6RewriteScriptsToModules, NodeTraversal.AbstractChangedScopeCallback, ProcessCommonJSModules

Enclosing class:

NodeTraversal

public abstract static class NodeTraversal.AbstractPreOrderCallback
extends java.lang.Object
implements NodeTraversal.Callback

Abstract callback to visit all nodes in preorder.

Constructor Summary

Constructors

Constructor	Description
AbstractPreOrderCallback()

Method Summary

Modifier and Type	Method	Description
void	visit(NodeTraversal t, Node n, Node parent)	Visits a node in postorder (after its children).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.google.javascript.jscomp.NodeTraversal.Callback

shouldTraverse

Constructor Detail

AbstractPreOrderCallback

public AbstractPreOrderCallback()

Method Detail

visit

public final void visit(NodeTraversal t,
                        Node n,
                        Node parent)

Description copied from interface: NodeTraversal.Callback

Visits a node in postorder (after its children). A node is visited in postorder iff NodeTraversal.Callback.shouldTraverse(NodeTraversal, Node, Node) returned true for its parent. In particular, the root node is never visited in postorder.

Siblings are always visited left-to-right.

Implementations can have side-effects (e.g. modify the parse tree). Removing the current node is legal, but removing or reordering nodes above the current node may cause nodes to be visited twice or not at all.

Specified by:

visit in interface NodeTraversal.Callback

Parameters:

t - The current traversal.

n - The current node.

parent - The parent of the current node.