com.google.javascript.jscomp

Interface NodeTraversal.Callback

All Known Subinterfaces:

NodeTraversal.ScopedCallback

All Known Implementing Classes:

BranchCoverageInstrumentationCallback, CheckArrayWithGoogObject, CheckConformance, CheckConstantCaseNames, CheckDuplicateCase, CheckEmptyStatements, CheckEnums, CheckEs6ModuleFileStructure, CheckEs6Modules, CheckInterfaces, CheckJSDocStyle, CheckMissingAndExtraRequires, CheckMissingSemicolon, CheckNoMutatedEs6Exports, CheckNullabilityModifiers, CheckNullableReturn, CheckPrimitiveAsObject, CheckPrototypeProperties, CheckProvidesSorted, CheckRequiresSorted, CheckTypeImportCodeReferences, CheckUnusedLabels, CheckUselessBlocks, ChromePass, ClosureCheckModule, ControlFlowAnalysis, ControlFlowGraph.AbstractCfgNodeTraversalCallback, CrossChunkReferenceCollector, DartSuperAccessorsPass, Es6CheckModule, Es6ConvertSuper, Es6ConvertSuperConstructorCalls, Es6ExtractClasses, Es6ForOfConverter, Es6InjectRuntimeLibraries, Es6NormalizeShorthandProperties, Es6RenameVariablesInParamLists, Es6RewriteArrowFunction, Es6RewriteBlockScopedDeclaration, Es6RewriteBlockScopedFunctionDeclaration, Es6RewriteClass, Es6RewriteClassExtendsExpressions, Es6RewriteDestructuring, Es6RewriteModules, Es6RewriteRestAndSpread, Es6RewriteScriptsToModules, Es6SplitVariableDeclarations, Es6TypedToEs6Converter, Es7RewriteExponentialOperator, EsModuleProcessor, FindModuleDependencies, ImplicitNullabilityCheck, J2clAssertRemovalPass, J2clChecksPass, J2clUtilGetDefineRewriterPass, JsMessageVisitor, LateEs6ToEs3Converter, MarkUntranspilableFeaturesAsRemoved, NodeTraversal.AbstractModuleCallback, NodeTraversal.AbstractPostOrderCallback, NodeTraversal.AbstractPreOrderCallback, NodeTraversal.AbstractScopedCallback, NodeTraversal.AbstractShallowCallback, NodeTraversal.AbstractShallowStatementCallback, NodeTraversal.ExternsSkippingCallback, ProcessCommonJSModules, ReferenceCollectingCallback, RewriteAsyncFunctions, RewriteAsyncIteration, RewriteJsonToModule, RewriteObjectSpread, TypeCheck

Enclosing class:

NodeTraversal

public static interface NodeTraversal.Callback

Callback for tree-based traversals

Method Summary

Modifier and Type	Method and Description
boolean	shouldTraverse(NodeTraversal nodeTraversal, Node n, Node parent) Visits a node in pre order (before visiting its children) and decides whether this node's children should be traversed.
void	visit(NodeTraversal t, Node n, Node parent) Visits a node in postorder (after its children have been visited).

Method Detail

shouldTraverse

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

Visits a node in pre order (before visiting its children) and decides whether this node's children should be traversed. If children are traversed, they will be visited by visit(NodeTraversal, Node, Node) in postorder.

Implementations can have side effects (e.g. modifying the parse tree).

Returns:

whether the children of this node should be visited

visit

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

Visits a node in postorder (after its children have been visited). A node is visited only if all its parents should be traversed (shouldTraverse(NodeTraversal, Node, Node)).

Implementations can have side effects (e.g. modifying the parse tree).