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runtime/lib/expando_patch.dart

 // Copyright (c) 2012, 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.
 
-@patch class Expando<T> {
-  @patch Expando([String name])
+@patch
+class Expando<T> {
+  @patch
+  Expando([String name])
       : name = name,
         _data = new List(_minSize),
         _used = 0;
 
   static const _minSize = 8;
   static final _deletedEntry = new _WeakProperty(null, null);
 
-  @patch T operator[](Object object) {
+  @patch
+  T operator [](Object object) {
     _checkType(object);
 
     var mask = _size - 1;
     var idx = object._identityHashCode & mask;
     var wp = _data[idx];
 
     while (wp != null) {
       if (identical(wp.key, object)) {
         return wp.value;
       } else if (wp.key == null) {
         // This entry has been cleared by the GC.
         _data[idx] = _deletedEntry;
       }
       idx = (idx + 1) & mask;
       wp = _data[idx];
     }
 
     return null;
   }
 
-  @patch void operator[]=(Object object, T value) {
+  @patch
+  void operator []=(Object object, T value) {
     _checkType(object);
 
     var mask = _size - 1;
     var idx = object._identityHashCode & mask;
     var empty_idx = -1;
     var wp = _data[idx];
 
     while (wp != null) {
       if (identical(wp.key, object)) {
         if (value != null) {
           // Update the associated value.
           wp.value = value;
         } else {
           // Mark the entry as deleted.
           _data[idx] = _deletedEntry;
         }
         return;
       } else if ((empty_idx < 0) && identical(wp, _deletedEntry)) {
-        empty_idx = idx;  // Insert at this location if not found.
+        empty_idx = idx; // Insert at this location if not found.
       } else if (wp.key == null) {
         // This entry has been cleared by the GC.
         _data[idx] = _deletedEntry;
         if (empty_idx < 0) {
-          empty_idx = idx;  // Insert at this location if not found.
+          empty_idx = idx; // Insert at this location if not found.
         }
       }
       idx = (idx + 1) & mask;
       wp = _data[idx];
     }
 
     if (value == null) {
       // Not entering a null value. We just needed to make sure to clear an
       // existing value if it existed.
       return;
     }
 
     if (empty_idx >= 0) {
       // We will be reusing the empty slot below.
       _used--;
       idx = empty_idx;
     }
 
     if (_used < _limit) {
       _data[idx] = new _WeakProperty(object, value);
       _used++;
       return;
     }
 
     // Grow/reallocate if too many slots have been used.
     _rehash();
-    this[object] = value;  // Recursively add the value.
+    this[object] = value; // Recursively add the value.
   }
 
   _rehash() {
     // Determine the population count of the map to allocate an appropriately
     // sized map below.
     var count = 0;
     var old_data = _data;
     var len = old_data.length;
     for (var i = 0; i < len; i++) {
       var entry = old_data[i];
@@ skipping 25 matching lines @@
         var key = entry.key;
         if (key != null) {
           this[key] = val;
         }
       }
     }
   }
 
   static _checkType(object) {
     if ((object == null) ||
-         (object is bool) ||
-         (object is num) ||
-         (object is String)) {
+        (object is bool) ||
+        (object is num) ||
+        (object is String)) {
       throw new ArgumentError.value(object,
           "Expandos are not allowed on strings, numbers, booleans or null");
     }
   }
 
   get _size => _data.length;
   get _limit => (3 * (_size ~/ 4));
 
   List _data;
-  int _used;  // Number of used (active and deleted) slots.
+  int _used; // Number of used (active and deleted) slots.
 }