Package com.google.javascript.jscomp

Class NodeTraversal.ExternsSkippingCallback

java.lang.Object

com.google.javascript.jscomp.NodeTraversal.ExternsSkippingCallback

All Implemented Interfaces:

NodeTraversal.Callback

Enclosing class:

NodeTraversal

public abstract static class NodeTraversal.ExternsSkippingCallback
extends Object
implements NodeTraversal.Callback

Abstract callback to visit all non-extern nodes in postorder. Note: Even though type-summary nodes are included under the externs roots, they are traversed by this callback.

Constructor Summary

Constructors

Constructor	Description
ExternsSkippingCallback()

Method Summary

Modifier and Type	Method	Description
final boolean	shouldTraverse(NodeTraversal t, Node n, Node parent)	Visits a node in preorder (before its children) and decides whether the node and 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 Details

ExternsSkippingCallback

public ExternsSkippingCallback()

Method Details

shouldTraverse

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

Description copied from interface: NodeTraversal.Callback

Visits a node in preorder (before its children) and decides whether the node and its children should be traversed.

If this method returns true, the node will be visited by NodeTraversal.Callback.visit(NodeTraversal, Node, Node) in postorder and its children will be visited by both NodeTraversal.Callback.shouldTraverse(NodeTraversal, Node, Node) in preorder and by NodeTraversal.Callback.visit(NodeTraversal, Node, Node) in postorder.

If this method returns false, the node will not be visited by NodeTraversal.Callback.visit(NodeTraversal, Node, Node) and its children will neither be visited by NodeTraversal.Callback.shouldTraverse(NodeTraversal, Node, Node) nor NodeTraversal.Callback.visit(NodeTraversal, Node, Node).

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:

t - The current traversal.

n - The current node.

parent - The parent of the current node.

Returns:

whether the children of this node should be visited