Package com.google.javascript.jscomp.ReferenceCollectingCallback

Examples of com.google.javascript.jscomp.ReferenceCollectingCallback.ReferenceCollection

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    private boolean maybeEscapedOrModifiedArguments(
        Scope scope, ReferenceMap referenceMap) {
      if (scope.isLocal()) {
        Var arguments = scope.getArgumentsVar();
        ReferenceCollection refs = referenceMap.getReferences(arguments);
        if (refs != null && !refs.references.isEmpty()) {
          for (Reference ref : refs.references) {
            Node refNode = ref.getNode();
            Node refParent = ref.getParent();
            // Any reference that is not a read of the arguments property
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    }
  }

  private void replaceReferences(String varName, InputId inputId,
      ReferenceCollection newSourceCollection) {
    ReferenceCollection combined = new ReferenceCollection();
    List<Reference> combinedRefs = combined.references;
    ReferenceCollection oldCollection = refMap.get(varName);
    refMap.put(varName, combined);
    if (oldCollection == null) {
      combinedRefs.addAll(newSourceCollection.references);
      return;
    }
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          }
        });
    NodeTraversal.traverse(compiler, root, collector);

    for (Var v : collector.getAllSymbols()) {
      ReferenceCollection refCollection = collector.getReferences(v);
      NamedInfo info = getNamedInfo(v);
      for (Reference ref : refCollection) {
        processReference(collector, ref, info);
      }
    }
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    } else if (n.isName()) {
      // If the value is guaranteed to never be changed after
      // this reference, then we can move it.
      Var v = scope.getVar(n.getString());
      if (v != null && v.isGlobal()) {
        ReferenceCollection refCollection = collector.getReferences(v);
        if (refCollection != null &&
            refCollection.isWellDefined() &&
            refCollection.isAssignedOnceInLifetime()) {
          return true;
        }
      }
    }
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          new ReferenceCollectingCallback(compiler,
              ReferenceCollectingCallback.DO_NOTHING_BEHAVIOR,
              Predicates.equalTo(aliasVar));
      collector.processScope(scope);

      ReferenceCollection aliasRefs = collector.getReferences(aliasVar);
      List<AstChange> newNodes = Lists.newArrayList();
      if (aliasRefs.isWellDefined()
          && aliasRefs.firstReferenceIsAssigningDeclaration()
          && aliasRefs.isAssignedOnceInLifetime()) {
        // The alias is well-formed, so do the inlining now.
        int size = aliasRefs.references.size();
        for (int i = 1; i < size; i++) {
          ReferenceCollectingCallback.Reference aliasRef =
              aliasRefs.references.get(i);
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            ReferenceCollectingCallback.DO_NOTHING_BEHAVIOR);

      NodeTraversal.traverse(compiler, root, callback);

      for (Var variable : callback.getAllSymbols()) {
        ReferenceCollection referenceCollection =
            callback.getReferences(variable);

        for (Reference reference : referenceCollection.references) {
          Node referenceNameNode = reference.getNode();
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    globalScope.declare(VAR3, new Node(Token.NAME), null, EXTERN1);
    var3Refs.references = Lists.newArrayList(var3In1Ext, var3In2Ref);

    // We recreate these two ReferenceCollection to keep var1Refs and
    // var2Refs intact in update operations for comparison in the tests.
    ReferenceCollection var1TempRefs = new ReferenceCollection();
    var1TempRefs.references = Lists.newArrayList(var1Refs.references);
    ReferenceCollection var2TempRefs = new ReferenceCollection();
    var2TempRefs.references = Lists.newArrayList(var2Refs.references);
    ReferenceCollection var3TempRefs = new ReferenceCollection();
    var3TempRefs.references = Lists.newArrayList(var3Refs.references);
    globalMap.put(globalScope.getVar(VAR1), var1TempRefs);
    globalMap.put(globalScope.getVar(VAR2), var2TempRefs);
    globalMap.put(globalScope.getVar(VAR3), var3TempRefs);
    map.updateGlobalVarReferences(globalMap, root);
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  /** Removes all variable references in second script. */
  public void testUpdateGlobalVarReferences_UpdateScriptNoRef() {
    Map<Var, ReferenceCollection> scriptMap = Maps.newHashMap();
    map.updateGlobalVarReferences(scriptMap, scriptRoot);
    ReferenceCollection refs = map.getReferences(globalScope.getVar(VAR2));
    assertEquals(var2Refs.references, refs.references);
    refs = map.getReferences(globalScope.getVar(VAR1));
    assertEquals(2, refs.references.size());
    assertEquals(var1Refs.references.get(0), refs.references.get(0));
    assertEquals(var1Refs.references.get(2), refs.references.get(1));
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  /** Changes variable references in second script. */
  public void testUpdateGlobalVarReferences_UpdateScriptNewRefs() {
    Map<Var, ReferenceCollection> scriptMap = Maps.newHashMap();

    ReferenceCollection newVar1Refs = new ReferenceCollection();
    Reference newVar1In2Ref = createRefForTest(INPUT2);
    newVar1Refs.references = Lists.newArrayList(newVar1In2Ref);

    ReferenceCollection newVar2Refs = new ReferenceCollection();
    Reference newVar2In2Ref = createRefForTest(INPUT2);
    newVar2Refs.references = Lists.newArrayList(newVar2In2Ref);

    ReferenceCollection newVar3Refs = new ReferenceCollection();
    Reference newVar3In2Ref = createRefForTest(INPUT2);
    newVar3Refs.references = Lists.newArrayList(newVar3In2Ref);

    scriptMap.put(globalScope.getVar(VAR1), newVar1Refs);
    scriptMap.put(globalScope.getVar(VAR2), newVar2Refs);
    scriptMap.put(globalScope.getVar(VAR3), newVar3Refs);
    map.updateGlobalVarReferences(scriptMap, scriptRoot);
    ReferenceCollection refs = map.getReferences(globalScope.getVar(VAR1));
    assertEquals(3, refs.references.size());
    assertEquals(var1Refs.references.get(0), refs.references.get(0));
    assertEquals(newVar1In2Ref, refs.references.get(1));
    assertEquals(var1Refs.references.get(2), refs.references.get(2));
    refs = map.getReferences(globalScope.getVar(VAR2));
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  /** Changes variable references in second script. */
  public void testUpdateGlobalVarReferences_UpdateScriptNewVar() {
    Map<Var, ReferenceCollection> scriptMap = Maps.newHashMap();
    final String var4 = "var4";
    globalScope.declare(var4, new Node(Token.NAME), null, INPUT2);
    ReferenceCollection newVar3Refs = new ReferenceCollection();
    Reference newVar3In2Ref = createRefForTest(INPUT2);
    newVar3Refs.references = Lists.newArrayList(newVar3In2Ref);
    scriptMap.put(globalScope.getVar(var4), newVar3Refs);
    map.updateGlobalVarReferences(scriptMap, scriptRoot);
    ReferenceCollection refs = map.getReferences(globalScope.getVar(var4));
    assertEquals(1, refs.references.size());
    assertEquals(newVar3In2Ref, refs.references.get(0));
  }
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Related Classes of com.google.javascript.jscomp.ReferenceCollectingCallback.ReferenceCollection

  • com.google.javascript.jscomp.CollapseProperties
  • com.google.javascript.jscomp.CrossModuleCodeMotion
  • com.google.javascript.jscomp.GlobalVarReferenceMap
  • com.google.javascript.jscomp.GlobalVarReferenceMapTest
  • com.google.javascript.jscomp.InlineObjectLiterals$InliningBehavior
  • com.google.javascript.jscomp.InlineVariables$InliningBehavior
  • com.google.javascript.jscomp.SideEffectsAnalysis$VariableUseDeclarationMap
  • com.google.javascript.jscomp.VariableReferenceCheck$ReferenceCheckingBehavior
  • com.google.javascript.jscomp.VariableVisibilityAnalysis
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