Package com.google.javascript.jscomp.ReferenceCollectingCallback

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

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          ReferenceCollectingCallback.DO_NOTHING_BEHAVIOR);

    NodeTraversal.traverse(compiler, root, callback);

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

      VariableVisibility visibility;

      if (variableIsParameter(variable)) {
        visibility = VariableVisibility.PARAMETER;
      } else if (variable.isLocal()) {
        if (referenceCollection.isEscaped()) {
          visibility = VariableVisibility.CAPTURED_LOCAL;
        } else {
          visibility = VariableVisibility.LOCAL;
        }
      } else if (variable.isGlobal()) {
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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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  }

  public void testUpdateReferencesWithGlobalScope() {
    Scope newGlobalScope = Scope.createGlobalScope(root);
    map.updateReferencesWithGlobalScope(newGlobalScope);
    ReferenceCollection references =
        map.getReferences(globalScope.getVar(VAR1));
    for (Reference ref : references) {
      assertEquals(newGlobalScope, ref.getScope());
    }
    references = map.getReferences(globalScope.getVar(VAR2));
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        if (isVarInlineForbidden(v)) {
          continue;
        }

        ReferenceCollection referenceInfo = referenceMap.getReferences(v);

        if (isInlinableObject(referenceInfo.references)) {
          // Blacklist the object itself, as well as any other values
          // that it refers to, since they will have been moved around.
          staleVars.add(v);

          Reference init = referenceInfo.getInitializingReference();

          // Split up the object into individual variables if the object
          // is never referenced directly in full.
          splitObject(v, init, referenceInfo);
        }
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      // Check all vars after finishing a scope
      Scope scope = t.getScope();
      for (Iterator<Var> it = scope.getVars(); it.hasNext();) {
        Var v = it.next();
        ReferenceCollection referenceCollection = referenceMap.getReferences(v);
        // TODO(moz): Figure out why this could be null
        if (referenceCollection != null) {
          if (scope.getRootNode().isFunction() && v.getParentNode().isDefaultValue()
              && v.getParentNode().getFirstChild() == v.getNode()) {
            checkDefaultParam(v, scope);
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    private void collectAliasCandidates(NodeTraversal t,
        ReferenceMap referenceMap) {
      if (mode != Mode.CONSTANTS_ONLY) {
        for (Iterator<Var> it = t.getScope().getVars(); it.hasNext();) {
          Var v = it.next();
          ReferenceCollection referenceInfo = referenceMap.getReferences(v);

          // NOTE(nicksantos): Don't handle variables that are never used.
          // The tests are much easier to write if you don't, and there's
          // another pass that handles unused variables much more elegantly.
          if (referenceInfo != null && referenceInfo.references.size() >= 2 &&
              referenceInfo.isWellDefined() &&
              referenceInfo.isAssignedOnceInLifetime()) {
            Reference init = referenceInfo.getInitializingReference();
            Node value = init.getAssignedValue();
            if (value != null && value.isName()) {
              aliasCandidates.put(value, new AliasCandidate(v, referenceInfo));
            }
          }
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      boolean maybeModifiedArguments =
          maybeEscapedOrModifiedArguments(t.getScope(), referenceMap);
      for (Iterator<Var> it = t.getScope().getVars(); it.hasNext();) {
        Var v = it.next();

        ReferenceCollection referenceInfo = referenceMap.getReferences(v);

        // referenceInfo will be null if we're in constants-only mode
        // and the variable is not a constant.
        if (referenceInfo == null || isVarInlineForbidden(v)) {
          // Never try to inline exported variables or variables that
          // were not collected or variables that have already been inlined.
          continue;
        } else if (isInlineableDeclaredConstant(v, referenceInfo)) {
          Reference init = referenceInfo.getInitializingReferenceForConstants();
          Node value = init.getAssignedValue();
          inlineDeclaredConstant(v, value, referenceInfo.references);
          staleVars.add(v);
        } else if (mode == Mode.CONSTANTS_ONLY) {
          // If we're in constants-only mode, don't run more aggressive
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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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