Make first and last getters.

runtime/bin/buffer_list.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.
 
 /**
  * Utility class that holds a number of byte buffers and can deliver
  * the bytes either one by one or in chunks.
  */
 class _BufferList {
   _BufferList() {
@@ skipping 10 matching lines @@
     _buffers.addLast(buffer);
     _length += buffer.length;
     if (offset != 0) _index = offset;
   }
 
   /**
    * Returns the first buffer from the list. This returns the whole
    * buffer and does not remove the buffer from the list. Use
    * [index] to determine the index of the first byte in the buffer.
    */
-  List<int> get first => _buffers.first();
+  List<int> get first => _buffers.first;
 
   /**
    * Returns the current index of the next byte. This will always be
    * an index into the first buffer as when the index is advanced past
    * the end of a buffer it is removed from the list.
    */
   int get index =>  _index;
 
   /**
    * Peek at the next available byte.
    */
-  int peek() => _buffers.first()[_index];
+  int peek() => _buffers.first[_index];
 
   /**
    * Returns the next available byte removing it from the buffers.
    */
   int next() {
-    int value = _buffers.first()[_index++];
+    int value = _buffers.first[_index++];
     _length--;
-    if (_index == _buffers.first().length) {
+    if (_index == _buffers.first.length) {
       _buffers.removeFirst();
       _index = 0;
     }
     return value;
   }
 
   /**
    * Read [count] bytes from the buffer list. If the number of bytes
    * requested is not available null will be returned.
    */
   List<int> readBytes(int count) {
     List<int> result;
     if (_length == 0 || _length < count) return null;
-    if (_index == 0 && _buffers.first().length == count) {
-      result = _buffers.first();
+    if (_index == 0 && _buffers.first.length == count) {
+      result = _buffers.first;
       _buffers.removeFirst();
       _index = 0;
       _length -= count;
       return result;
     } else {
-      int firstRemaining = _buffers.first().length - _index;
+      int firstRemaining = _buffers.first.length - _index;
       if (firstRemaining >= count) {
-        result = _buffers.first().getRange(_index, count);
+        result = _buffers.first.getRange(_index, count);
         _index += count;
         _length -= count;
-        if (_index == _buffers.first().length) {
+        if (_index == _buffers.first.length) {
           _buffers.removeFirst();
           _index = 0;
         }
         return result;
       } else {
         result = new Uint8List(count);
         int remaining = count;
         while (remaining > 0) {
-          int bytesInFirst = _buffers.first().length - _index;
+          int bytesInFirst = _buffers.first.length - _index;
           if (bytesInFirst <= remaining) {
             result.setRange(count - remaining,
                             bytesInFirst,
-                            _buffers.first(),
+                            _buffers.first,
                             _index);
             _buffers.removeFirst();
             _index = 0;
             _length -= bytesInFirst;
             remaining -= bytesInFirst;
           } else {
             result.setRange(count - remaining,
                             remaining,
-                            _buffers.first(),
+                            _buffers.first,
                             _index);
             _index = remaining;
             _length -= remaining;
             remaining = 0;
-            assert(_index < _buffers.first().length);
+            assert(_index < _buffers.first.length);
           }
         }
         return result;
       }
     }
   }
 
   /**
    * Remove a number of bytes from the buffer list. Currently the
    * number of bytes to remove must be confined to the first buffer.
@@ skipping 28 matching lines @@
   void clear() {
     _index = 0;
     _length = 0;
     _buffers = new Queue();
   }
 
   int _length;  // Total number of bytes remaining in the buffers.
   Queue<List<int>> _buffers;  // List of data buffers.
   int _index;  // Index of the next byte in the first buffer.
 }