Examples of com.google.javascript.jscomp.AnalyzePrototypeProperties.Property

Package com.google.javascript.jscomp.AnalyzePrototypeProperties

Examples of com.google.javascript.jscomp.AnalyzePrototypeProperties.Property

com.google.javascript.jscomp.AnalyzePrototypeProperties.Property

      while (declarations.hasNext()) {
        Symbol symbol = declarations.next();
        if (!(symbol instanceof Property)) {
          continue;
        }
        Property prop = (Property) symbol;


        // We should only move a property across modules if:
        // 1) We can move it deeper in the module graph, and
        // 2) it's a function, and
        // 3) it is not a GETTER_DEF or a SETTER_DEF, and
        // 4) the class is available in the global scope.
        //
        // #1 should be obvious. #2 is more subtle. It's possible
        // to copy off of a prototype, as in the code:
        // for (var k in Foo.prototype) {
        //   doSomethingWith(Foo.prototype[k]);
        // }
        // This is a common way to implement pseudo-multiple inheritance in JS.
        //
        // So if we move a prototype method into a deeper module, we must
        // replace it with a stub function so that it preserves its original
        // behavior.
        if (prop.getRootVar() == null || !prop.getRootVar().isGlobal()) {
          continue;
        }


        Node value = prop.getValue();
        // Only attempt to move normal functions.
        if (!value.isFunction()
            // A GET or SET can't be deferred like a normal
            // FUNCTION property definition as a mix-in would get the result
            // of a GET instead of the function itself.
            || value.getParent().isGetterDef()
            || value.getParent().isSetterDef()) {
          continue;
        }


        if (moduleGraph.dependsOn(deepestCommonModuleRef, prop.getModule())) {
          if (hasUnmovableRedeclaration(nameInfo, prop)) {
            // If it has been redeclared on the same object, skip it.
            continue;
          }


          Node valueParent = value.getParent();
          Node proto = prop.getPrototype();
          int stubId = idGenerator.newId();


          // example: JSCompiler_stubMethod(id);
          Node stubCall = IR.call(
              IR.name(STUB_METHOD_NAME),

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  static boolean hasUnmovableRedeclaration(NameInfo nameInfo, Property prop) {
    for (Symbol symbol : nameInfo.getDeclarations()) {
      if (!(symbol instanceof Property)) {
        continue;
      }
      Property otherProp = (Property) symbol;
      // It is possible to do better here if the dependencies are well defined
      // but redefinitions are usually in optional modules so it isn't likely
      // worth the effort to check.
      if (prop != otherProp
          && prop.getRootVar() == otherProp.getRootVar()
          && prop.getModule() != otherProp.getModule()) {
        return true;
      }
    }
    return false;
  }

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      while (declarations.hasNext()) {
        Symbol symbol = declarations.next();
        if (!(symbol instanceof Property)) {
          continue;
        }
        Property prop = (Property) symbol;


        // We should only move a property across modules if:
        // 1) We can move it deeper in the module graph, and
        // 2) it's a function.
        // 3) it is not a get or a set.
        //
        // #1 should be obvious. #2 is more subtle. It's possible
        // to copy off of a prototype, as in the code:
        // for (var k in Foo.prototype) {
        //   doSomethingWith(Foo.prototype[k]);
        // }
        // This is a common way to implement pseudo-multiple inheritance in JS.
        //
        // So if we move a prototype method into a deeper module, we must
        // replace it with a stub function so that it preserves its original
        // behavior.
        Node value = prop.getValue();
        if (moduleGraph.dependsOn(deepestCommonModuleRef, prop.getModule()) &&
            value.getType() == Token.FUNCTION) {
          Node valueParent = value.getParent();
          if (valueParent.getType() == Token.GET
              || valueParent.getType() == Token.SET) {
            // TODO(johnlenz): a GET or SET can't be deferred like a normal
            // FUNCTION property definition as a mix-in would get the result
            // of a GET instead of the function itself.
            continue;
          }
          Node proto = prop.getPrototype();
          int stubId = idGenerator.newId();


          // example: JSCompiler_stubMethod(id);
          Node stubCall = new Node(Token.CALL,
              Node.newString(Token.NAME, STUB_METHOD_NAME),
              Node.newNumber(stubId))
              .copyInformationFromForTree(value);
          stubCall.putBooleanProp(Node.FREE_CALL, true);


          // stub out the method in the original module
          // A.prototype.b = JSCompiler_stubMethod(id);
          valueParent.replaceChild(value, stubCall);


          // unstub the function body in the deeper module
          Node unstubParent = compiler.getNodeForCodeInsertion(
              deepestCommonModuleRef);
          Node unstubCall = new Node(Token.CALL,
              Node.newString(Token.NAME, UNSTUB_METHOD_NAME),
              Node.newNumber(stubId),
              value);
          unstubCall.putBooleanProp(Node.FREE_CALL, true);
          unstubParent.addChildToFront(
              // A.prototype.b = JSCompiler_unstubMethod(id, body);
              new Node(Token.EXPR_RESULT,
                  new Node(Token.ASSIGN,
                      new Node(Token.GETPROP,
                          proto.cloneTree(),
                          Node.newString(Token.STRING, nameInfo.name)),
                      unstubCall))
                  .copyInformationFromForTree(value));


          compiler.reportCodeChange();
          logger.fine("Moved method: " +
              proto.getQualifiedName() + "." + nameInfo.name +
              " from module " + prop.getModule() + " to module " +
              deepestCommonModuleRef);
        }
      }
    }

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