Examples of com.google.javascript.rhino.Node

com.google.javascript.rhino.Node
This class implements the root of the intermediate representation.

  }


  private void visitObjectWithComputedProperty(Node obj, Node parent) {
    Preconditions.checkArgument(obj.isObjectLit());
    List<Node> props = new ArrayList<>();
    Node currElement = obj.getFirstChild();


    while (currElement != null) {
      if (currElement.getBooleanProp(Node.COMPUTED_PROP_GETTER)
          || currElement.getBooleanProp(Node.COMPUTED_PROP_SETTER)) {
        cannotConvertYet(currElement, "computed getter/setter");
        return;
      } else if (currElement.isGetterDef() || currElement.isSetterDef()) {
        currElement = currElement.getNext();
      } else {
        Node nextNode = currElement.getNext();
        obj.removeChild(currElement);
        props.add(currElement);
        currElement = nextNode;
      }
    }


    String objName = FRESH_COMP_PROP_VAR + compiler.getUniqueNameIdSupplier().get();


    props = Lists.reverse(props);
    Node result = IR.name(objName);
    for (Node propdef : props) {
      if (propdef.isComputedProp()) {
        Node propertyExpression = propdef.removeFirstChild();
        Node value = propdef.removeFirstChild();
        result = IR.comma(
            IR.assign(
                IR.getelem(
                    IR.name(objName),
                    propertyExpression),
                value),
            result);
      } else {
        if (!propdef.hasChildren()) {
          Node name = IR.name(propdef.getString()).copyInformationFrom(propdef);
          propdef.addChildToBack(name);
        }
        Node val = propdef.removeFirstChild();
        propdef.setType(Token.STRING);
        int type = propdef.isQuotedString() ? Token.GETELEM : Token.GETPROP;
        Node access = new Node(type, IR.name(objName), propdef);
        result = IR.comma(IR.assign(access, val), result);
      }
    }


    Node statement = obj;
    while (!NodeUtil.isStatement(statement)) {
      statement = statement.getParent();
    }


    result.useSourceInfoIfMissingFromForTree(obj);
    parent.replaceChild(obj, result);


    Node var = IR.var(IR.name(objName), obj);
    var.useSourceInfoIfMissingFromForTree(statement);
    statement.getParent().addChildBefore(var, statement);
    compiler.reportCodeChange();
  }

View Full Code Here

    statement.getParent().addChildBefore(var, statement);
    compiler.reportCodeChange();
  }


  private void checkClassSuperReferences(Node classNode) {
    Node className = classNode.getFirstChild();
    Node superClassName = className.getNext();
    if (NodeUtil.referencesSuper(classNode) && !superClassName.isQualifiedName()) {
      compiler.report(JSError.make(classNode, NO_SUPERTYPE));
    }
  }

View Full Code Here

   *   3) The constructor is built.
   */
  private void visitClass(Node classNode, Node parent) {
    checkClassReassignment(classNode);
    // Collect Metadata
    Node className = classNode.getFirstChild();
    Node superClassName = className.getNext();
    Node classMembers = classNode.getLastChild();


    // This is a statement node. We insert methods of the
    // transpiled class after this node.
    Node insertionPoint;


    if (!superClassName.isEmpty() && !superClassName.isQualifiedName()) {
      compiler.report(JSError.make(superClassName, DYNAMIC_EXTENDS_TYPE));
      return;
    }


    // The fully qualified name of the class, which will be used in the output.
    // May come from the class itself or the LHS of an assignment.
    String fullClassName = null;


    // Whether the constructor function in the output should be anonymous.
    boolean anonymous;


    // If this is a class statement, or a class expression in a simple
    // assignment or var statement, convert it. In any other case, the
    // code is too dynamic, so just call cannotConvert.
    if (NodeUtil.isStatement(classNode)) {
      fullClassName = className.getString();
      anonymous = false;
      insertionPoint = classNode;
    } else if (parent.isAssign() && parent.getParent().isExprResult()) {
      // Add members after the EXPR_RESULT node:
      // example.C = class {}; example.C.prototype.foo = function() {};
      fullClassName = parent.getFirstChild().getQualifiedName();
      if (fullClassName == null) {
        cannotConvert(parent, "Can only convert classes that are declarations or the right hand"
            + " side of a simple assignment.");
        return;
      }
      anonymous = true;
      insertionPoint = parent.getParent();
    } else if (parent.isName()) {
      // Add members after the 'var' statement.
      // var C = class {}; C.prototype.foo = function() {};
      fullClassName =  parent.getString();
      anonymous = true;
      insertionPoint = parent.getParent();
    } else {
      cannotConvert(parent, "Can only convert classes that are declarations or the right hand"
            + " side of a simple assignment.");
      return;
    }


    if (!className.isEmpty() && !className.getString().equals(fullClassName)) {
      // cannot bind two class names in the case of: var Foo = class Bar {};
      cannotConvertYet(classNode, "named class in an assignment");
      return;
    }


    boolean useUnique = NodeUtil.isStatement(classNode) && !isInFunction(classNode);
    String uniqueFullClassName = useUnique ? getUniqueClassName(fullClassName) : fullClassName;
    String superClassString = superClassName.getQualifiedName();


    Verify.verify(NodeUtil.isStatement(insertionPoint));


    Node constructor = null;
    JSDocInfo ctorJSDocInfo = null;
    // Process all members of the class
    for (Node member : classMembers.children()) {
      if (member.isEmpty()) {
        continue;
      }


      if (member.isMemberDef() && member.getString().equals("constructor")) {
        ctorJSDocInfo = member.getJSDocInfo();
        constructor = member.getFirstChild().detachFromParent();
        if (!anonymous) {
          constructor.replaceChild(
              constructor.getFirstChild(), className.cloneNode());
        }
      } else {
        Node qualifiedMemberName;
        Node method;
        if (member.isMemberDef()) {
          if (member.isStaticMember()) {
            qualifiedMemberName = NodeUtil.newQName(
                compiler,
                Joiner.on(".").join(
                    uniqueFullClassName,
                    member.getString()));
          } else {
            qualifiedMemberName = NodeUtil.newQName(
                compiler,
                Joiner.on(".").join(
                    uniqueFullClassName,
                    "prototype",
                    member.getString()));
          }
          method = member.getFirstChild().detachFromParent();
        } else if (member.isComputedProp()) {
          if (member.isStaticMember()) {
            qualifiedMemberName = IR.getelem(
                NodeUtil.newQName(
                    compiler,
                    uniqueFullClassName),
                member.removeFirstChild());
          } else {
            qualifiedMemberName = IR.getelem(
                NodeUtil.newQName(
                    compiler,
                    Joiner.on('.').join(uniqueFullClassName, "prototype")),
                member.removeFirstChild());
          }
          method = member.getLastChild().detachFromParent();
        } else {
          throw new IllegalStateException("Unexpected class member: " + member);
        }
        Node assign = IR.assign(qualifiedMemberName, method);
        assign.useSourceInfoIfMissingFromForTree(member);


        JSDocInfo info = member.getJSDocInfo();
        if (member.isStaticMember() && NodeUtil.referencesThis(assign.getLastChild())) {
          JSDocInfoBuilder memberDoc;
          if (info == null) {
            memberDoc = new JSDocInfoBuilder(true);
          } else {
            memberDoc = JSDocInfoBuilder.copyFrom(info);
          }
          memberDoc.recordThisType(
              new JSTypeExpression(new Node(Token.BANG, new Node(Token.QMARK)),
              member.getSourceFileName()));
          info = memberDoc.build(assign);
        }
        if (info != null) {
          info.setAssociatedNode(assign);
          assign.setJSDocInfo(info);
        }


        Node newNode = NodeUtil.newExpr(assign);
        insertionPoint.getParent().addChildAfter(newNode, insertionPoint);
        insertionPoint = newNode;
      }
    }


    // Rewrite constructor
    if (constructor == null) {
      Node body = IR.block();
      if (!superClassName.isEmpty()) {
        Node superCall = baseCall(classNode, "constructor", null);
        body.addChildToBack(IR.exprResult(superCall));
      }
      Node name = anonymous
          ? IR.name("").srcref(className) : className.detachFromParent();
      constructor = IR.function(
          name,
          IR.paramList(),
          body).useSourceInfoIfMissingFromForTree(classNode);
    }
    JSDocInfo classJSDoc = classNode.getJSDocInfo();
    JSDocInfoBuilder newInfo = (classJSDoc != null) ?
        JSDocInfoBuilder.copyFrom(classJSDoc) :
        new JSDocInfoBuilder(true);


    newInfo.recordConstructor();
    if (!superClassName.isEmpty()) {


      if (newInfo.isInterfaceRecorded()) {
        newInfo.recordExtendedInterface(new JSTypeExpression(new Node(Token.BANG,
            IR.string(superClassString)),
            superClassName.getSourceFileName()));
      } else {
        Node inherits = IR.call(
            NodeUtil.newQName(compiler, INHERITS),
            NodeUtil.newQName(compiler, fullClassName),
            NodeUtil.newQName(compiler, superClassString));
        Node inheritsCall = IR.exprResult(inherits);
        inheritsCall.useSourceInfoIfMissingFromForTree(classNode);
        Node enclosingStatement = NodeUtil.getEnclosingStatement(classNode);
        enclosingStatement.getParent().addChildAfter(inheritsCall, enclosingStatement);
        newInfo.recordBaseType(new JSTypeExpression(new Node(Token.BANG,
            IR.string(superClassString)),
            superClassName.getSourceFileName()));


        Node copyProps = IR.call(
            NodeUtil.newQName(compiler, COPY_PROP),
            NodeUtil.newQName(compiler, fullClassName),
            NodeUtil.newQName(compiler, superClassString));
        copyProps.useSourceInfoIfMissingFromForTree(classNode);
        enclosingStatement.getParent().addChildAfter(
            IR.exprResult(copyProps).srcref(classNode), enclosingStatement);
      }
    }


    // Classes are @struct by default.
    if (!newInfo.isUnrestrictedRecorded() && !newInfo.isDictRecorded() &&
        !newInfo.isStructRecorded()) {
      newInfo.recordStruct();
    }


    if (ctorJSDocInfo != null) {
      newInfo.recordSuppressions(ctorJSDocInfo.getSuppressions());
      for (String param : ctorJSDocInfo.getParameterNames()) {
        newInfo.recordParameter(param, ctorJSDocInfo.getParameterType(param));
      }
    }
    insertionPoint = constructor;


    if (NodeUtil.isStatement(classNode)) {
      constructor.getFirstChild().setString("");
      Node ctorVar = IR.var(IR.name(fullClassName), constructor);
      ctorVar.useSourceInfoIfMissingFromForTree(classNode);
      parent.replaceChild(classNode, ctorVar);
    } else {
      parent.replaceChild(classNode, constructor);
    }


    if (NodeUtil.isStatement(constructor)) {
      insertionPoint.setJSDocInfo(newInfo.build(insertionPoint));
    } else if (parent.isName()) {
      // The constructor function is the RHS of a var statement.
      // Add the JSDoc to the VAR node.
      Node var = parent.getParent();
      var.setJSDocInfo(newInfo.build(var));
    } else if (constructor.getParent().isName()) {
      // Is a newly created VAR node.
      Node var = constructor.getParent().getParent();
      var.setJSDocInfo(newInfo.build(var));
    } else if (parent.isAssign()) {
      // The constructor function is the RHS of an assignment.
      // Add the JSDoc to the ASSIGN node.
      parent.setJSDocInfo(newInfo.build(parent));
    } else {

View Full Code Here

  /**
   * Converts ES6 arrow functions to standard anonymous ES3 functions.
   */
  private void visitArrowFunction(NodeTraversal t, Node n) {
    n.setIsArrowFunction(false);
    Node body = n.getLastChild();
    if (!body.isBlock()) {
      body.detachFromParent();
      body = IR.block(IR.returnNode(body).srcref(body)).srcref(body);
      n.addChildToBack(body);
    }


    UpdateThisAndArgumentsReferences updater =

View Full Code Here

    }
    if (scope.isDeclared(ARGUMENTS_VAR, false)) {
      addArguments = false;
    }


    Node parent = t.getScopeRoot();
    if (parent.isFunction()) {
      // Add the new node at the beginning of the function body.
      parent = parent.getLastChild();
    }
    if (parent.isSyntheticBlock() && parent.getFirstChild().isScript()) {
      // Add the new node inside the SCRIPT node instead of the
      // synthetic block that contains it.
      parent = parent.getFirstChild();
    }


    CompilerInput input = compiler.getInput(parent.getInputId());
    if (addArguments) {
      Node name = IR.name(ARGUMENTS_VAR).srcref(parent);
      Node argumentsVar = IR.var(name, IR.name("arguments").srcref(parent));
      argumentsVar.srcref(parent);
      parent.addChildToFront(argumentsVar);
      scope.declare(ARGUMENTS_VAR, name, null, input);
    }
    if (addThis) {
      Node name = IR.name(THIS_VAR).srcref(parent);
      Node thisVar = IR.var(name, IR.thisNode().srcref(parent));
      thisVar.srcref(parent);
      parent.addChildToFront(thisVar);
      scope.declare(THIS_VAR, name, null, input);
    }
  }

View Full Code Here

  private void inFunction(String js) {
    // Parse the body of the function.
    String thisBlock = assumedThisType == null
        ? ""
        : "/** @this {" + assumedThisType + "} */";
    Node root = compiler.parseTestCode(
        "(" + thisBlock + " function() {" + js + "});");
    assertEquals("parsing error: " +
        Joiner.on(", ").join(compiler.getErrors()),
        0, compiler.getErrorCount());


    Node n = root.getFirstChild().getFirstChild();
    // Create the scope with the assumptions.
    TypedScopeCreator scopeCreator = new TypedScopeCreator(compiler);
    Scope assumedScope = scopeCreator.createScope(
        n, scopeCreator.createScope(root, null));
    for (Map.Entry<String,JSType> entry : assumptions.entrySet()) {

View Full Code Here

    private boolean changedArguments = false;


    @Override
    public void visit(NodeTraversal t, Node n, Node parent) {
      if (n.isThis()) {
        Node name = IR.name(THIS_VAR).srcref(n);
        parent.replaceChild(n, name);
        changedThis = true;
      } else if (n.isName() && n.getString().equals("arguments")) {
        Node name = IR.name(ARGUMENTS_VAR).srcref(n);
        parent.replaceChild(n, name);
        changedArguments = true;
      }
    }

View Full Code Here

        // TODO(johnlenz): inputId maybe null if the FUNCTION node is detached
        // from the AST.
        // Is it meaningful to build a scope for detached FUNCTION node?
      }


      final Node fnNameNode = n.getFirstChild();
      final Node args = fnNameNode.getNext();
      final Node body = args.getNext();


      // Bleed the function name into the scope, if it hasn't
      // been declared in the outer scope.
      String fnName = fnNameNode.getString();
      if (!fnName.isEmpty() && NodeUtil.isFunctionExpression(n)) {

View Full Code Here

    switch (n.getType()) {
      case Token.VAR:
        // Declare all variables. e.g. var x = 1, y, z;
        for (Node child = n.getFirstChild();
             child != null;) {
          Node next = child.getNext();
          declareVar(child);
          child = next;
        }
        return;


      case Token.FUNCTION:
        if (NodeUtil.isFunctionExpression(n)) {
          return;
        }


        String fnName = n.getFirstChild().getString();
        if (fnName.isEmpty()) {
          // This is invalid, but allow it so the checks can catch it.
          return;
        }
        declareVar(n.getFirstChild());
        return;   // should not examine function's children


      case Token.CATCH:
        Preconditions.checkState(n.getChildCount() == 2);
        Preconditions.checkState(n.getFirstChild().isName());
        // the first child is the catch var and the second child
        // is the code block


        final Node var = n.getFirstChild();
        final Node block = var.getNext();


        declareVar(var);
        scanVars(block);
        return;  // only one child to scan


      case Token.SCRIPT:
        inputId = n.getInputId();
        Preconditions.checkNotNull(inputId);
        break;
    }


    // Variables can only occur in statement-level nodes, so
    // we only need to traverse children in a couple special cases.
    if (NodeUtil.isControlStructure(n) || NodeUtil.isStatementBlock(n)) {
      for (Node child = n.getFirstChild();
           child != null;) {
        Node next = child.getNext();
        scanVars(child);
        child = next;
      }
    }
  }

View Full Code Here


      super.visit(t, n, parent);
    }


    private ObjectType getThisTypeForCollectingProperties() {
      Node rootNode = scope.getRootNode();
      if (rootNode.isFromExterns()) return null;


      JSType type = rootNode.getJSType();
      if (type == null || !type.isFunctionType()) return null;


      FunctionType fnType = type.toMaybeFunctionType();
      JSType fnThisType = fnType.getTypeOfThis();
      return fnThisType.isUnknownType() ? null : fnThisType.toObjectType();

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of com.google.javascript.rhino.Node

com.google.javascript.jscomp.AliasExternals

com.google.javascript.jscomp.AliasStrings

com.google.javascript.jscomp.AnalyzePrototypeProperties$GlobalFunction

com.google.javascript.jscomp.AnalyzePrototypeProperties$ProcessProperties

com.google.javascript.jscomp.AstParallelizerTest

com.google.javascript.jscomp.AstValidator

com.google.javascript.jscomp.AstValidatorTest

com.google.javascript.jscomp.CallGraphTest

com.google.javascript.jscomp.CheckGlobalNames

com.google.javascript.jscomp.CheckGlobalThis

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.