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pkg/compiler/lib/src/util/enumset.dart

 // Copyright (c) 2016, 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 dart2js.util.enumset;
 
 import 'dart:collection';
 
 /// A set of enum values based on a bit mask of the shifted enum indices.
 abstract class EnumSet<E> {
@@ skipping 113 matching lines @@
 
   const _ConstEnumSet(this.value) : super._();
 
   factory _ConstEnumSet.fromValues(Iterable<E> values) {
     int value = 0;
     void add(E enumValue) {
       if (enumValue != null) {
         value |= 1 << (enumValue as dynamic).index;
       }
     }
+
     values.forEach(add);
     return new _ConstEnumSet(value);
   }
 
   @override
   void add(E enumValue) {
     throw new UnsupportedError('EnumSet.add');
   }
 
   @override
@@ skipping 46 matching lines @@
         _mask >>= 1;
         _index--;
         if (_current != null) {
           break;
         }
       }
       return _current != null;
     }
   }
 }