Initial implementation for lazy compound assignment operators

pkg/analyzer/lib/src/generated/engine.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer.src.generated.engine;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 1052 matching lines @@
    */
   @deprecated
   bool get enableConditionalDirectives;
 
   /**
    * Return `true` to enable generic methods (DEP 22).
    */
   bool get enableGenericMethods => null;
 
   /**
+   * Return `true` to enable the lazy compound assignment operators '&&=' and
+   * '||='.
+   */
+  bool get enableLazyAssignmentOperators;
+
+  /**
    * Return `true` to strictly follow the specification when generating
    * warnings on "call" methods (fixes dartbug.com/21938).
    */
   bool get enableStrictCallChecks;
 
   /**
    * Return `true` if mixins are allowed to inherit from types other than
    * Object, and are allowed to reference `super`.
    */
   bool get enableSuperMixins;
@@ skipping 129 matching lines @@
   /**
    * A flag indicating whether analysis is to enable async support.
    */
   bool enableAsync = true;
 
   /**
    * A flag indicating whether generic methods are to be supported (DEP 22).
    */
   bool enableGenericMethods = false;
 
+  @override
+  bool enableLazyAssignmentOperators = false;
+
   /**
    * A flag indicating whether analysis is to strictly follow the specification
    * when generating warnings on "call" methods (fixes dartbug.com/21938).
    */
   bool enableStrictCallChecks = false;
 
   /**
    * A flag indicating whether mixins are allowed to inherit from types other
    * than Object, and are allowed to reference `super`.
    */
@@ skipping 1471 matching lines @@
    * The data that was created from the source.
    */
   final E data;
 
   /**
    * Initialize a newly created holder to associate the given [data] with the
    * given [modificationTime].
    */
   TimestampedData(this.modificationTime, this.data);
 }