Work in progress: changes to interpretation

frog/lib/corelib_impl.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.
 
 #library("dart:coreimpl");
 
 #source("../../corelib/src/implementation/dual_pivot_quicksort.dart");
 #source("../../corelib/src/implementation/duration_implementation.dart");
 #source("../../corelib/src/implementation/exceptions.dart");
 #source("../../corelib/src/implementation/future_implementation.dart");
@@ skipping 215 matching lines @@
     ret[itemsAndKeys[i++]] = itemsAndKeys[i++];
   }
   return ret;
 }
 
 ImmutableMap _constMap(List itemsAndKeys) {
   return new ImmutableMap(itemsAndKeys);
 }
 
 /** An immutable map. */
+// TODO(jmesserly): extends HashMapImplementation<K, V>?
 class ImmutableMap<K, V> implements Map<K, V> {
   final Map<K, V> _internal;
 
   ImmutableMap(List keyValuePairs) : _internal = _map(keyValuePairs);
 
   V operator [](K key) => _internal[key];
 
   bool isEmpty() => _internal.isEmpty();
 
   int get length() => _internal.length;
@@ skipping 257 matching lines @@
     } else if (isNaN()) {
       if (other.isNaN()) {
         return 0;
       }
       return 1;
     } else {
       return -1;
     }
   }
 }