Add List.insert.

runtime/lib/array.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.
 
 
 // TODO(srdjan): Use shared array implementation.
 class _ObjectArray<E> implements List<E> {
 
   factory _ObjectArray(length) native "ObjectArray_allocate";
 
   E operator [](int index) native "ObjectArray_getIndexed";
 
   void operator []=(int index, E value) native "ObjectArray_setIndexed";
 
   String toString() {
     return Collections.collectionToString(this);
   }
 
   int get length native "ObjectArray_getLength";
 
   void _copyFromObjectArray(_ObjectArray src,
                             int srcStart,
                             int dstStart,
                             int count)
       native "ObjectArray_copyFromObjectArray";
 
+  void insertAt(int index, E element) {
+    throw new UnsupportedError(
+        "Cannot add to a non-extendable array");
+  }
+
   E removeAt(int index) {
     throw new UnsupportedError(
         "Cannot remove element of a non-extendable array");
   }
 
   void remove(Object element) {
     throw new UnsupportedError(
         "Cannot remove element of a non-extendable array");
   }
 
@@ skipping 217 matching lines @@
 
   E operator [](int index) native "ObjectArray_getIndexed";
 
   void operator []=(int index, E value) {
     throw new UnsupportedError(
         "Cannot modify an immutable array");
   }
 
   int get length native "ObjectArray_getLength";
 
+  void insertAt(int index, E element) {
+    throw new UnsupportedError(
+        "Cannot add to a non-extendable array");

[srdjan, 2013/03/04 00:53:47]

to an immutable array

[Lasse Reichstein Nielsen, 2013/03/04 09:06:02]

Consider changing "immutable" to "unmodifiable" while you are here.

[floitsch, 2013/03/05 17:51:58]

Done.

[floitsch, 2013/03/05 17:51:58]

not in this CL. Filed http://dartbug.com/8925

+  }
+
   E removeAt(int index) {
     throw new UnsupportedError(
         "Cannot modify an immutable array");
   }
 
   void remove(Object element) {
     throw new UnsupportedError(
         "Cannot modify an immutable array");
   }
 
@@ skipping 224 matching lines @@
     }
     _position = _length;
     _current = null;
     return false;
   }
 
   E get current {
     return _current;
   }
 }