Package com.google.javascript.jscomp

Class NodeTraversal.AbstractScopedCallback

java.lang.Object

com.google.javascript.jscomp.NodeTraversal.AbstractScopedCallback

All Implemented Interfaces:

NodeTraversal.Callback, NodeTraversal.ScopedCallback

Enclosing class:

NodeTraversal

public abstract static class NodeTraversal.AbstractScopedCallback
extends java.lang.Object
implements NodeTraversal.ScopedCallback

Abstract scoped callback to visit all nodes in postorder.

Constructor Summary

Constructors

Constructor	Description
AbstractScopedCallback()

Method Summary

Modifier and Type	Method	Description
void	enterScope(NodeTraversal t)	Called immediately after entering a new scope.
void	exitScope(NodeTraversal t)	Called immediately before exiting a scope.
boolean	shouldTraverse(NodeTraversal nodeTraversal, Node n, Node parent)	Visits a node in preorder (before its children) and decides whether its children should be traversed.

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

visit

Constructor Detail

AbstractScopedCallback

public AbstractScopedCallback()

Method Detail

shouldTraverse

public final boolean shouldTraverse(NodeTraversal nodeTraversal,
                                    Node n,
                                    Node parent)

Description copied from interface: NodeTraversal.Callback

Visits a node in preorder (before its children) and decides whether its children should be traversed. If the children should be traversed, they will be visited by NodeTraversal.Callback.shouldTraverse(NodeTraversal, Node, Node) in preorder and by NodeTraversal.Callback.visit(NodeTraversal, Node, Node) 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:

shouldTraverse in interface NodeTraversal.Callback

Parameters:

nodeTraversal - The current traversal.

n - The current node.

parent - The parent of the current node.

Returns:

whether the children of this node should be visited

enterScope

public void enterScope(NodeTraversal t)

Description copied from interface: NodeTraversal.ScopedCallback

Called immediately after entering a new scope. The new scope can be accessed through t.getScope()

Specified by:

enterScope in interface NodeTraversal.ScopedCallback

exitScope

public void exitScope(NodeTraversal t)

Description copied from interface: NodeTraversal.ScopedCallback

Called immediately before exiting a scope. The ending scope can be accessed through t.getScope()

Specified by:

exitScope in interface NodeTraversal.ScopedCallback