Write end-of-block comments.

pkg/analyzer/lib/src/generated/scanner.dart

 // Copyright (c) 2014, 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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.scanner;
 
 import 'dart:collection';
@@ skipping 922 matching lines @@
       int next = _reader.advance();
       while (next != -1) {
         tokenCounter++;
         next = bigSwitch(next);
       }
       _appendEofToken();
       instrumentation.metric2("tokensCount", tokenCounter);
       return firstToken;
     } finally {
       instrumentation.log2(2);
+      //Log if over 1ms
     }
   }
 
   /**
    * Append the given token to the end of the token stream being scanned. This method is intended to
    * be used by subclasses that copy existing tokens and should not normally be used because it will
    * fail to correctly associate any comments with the token being passed in.
    *
    * @param token the token to be appended
    */
@@ skipping 217 matching lines @@
     } else {
       eofToken = new TokenWithComment(TokenType.EOF, _reader.offset + 1, _firstComment);
       _firstComment = null;
       _lastComment = null;
     }
     // The EOF token points to itself so that there is always infinite look-ahead.
     eofToken.setNext(eofToken);
     _tail = _tail.setNext(eofToken);
     if (_stackEnd >= 0) {
       _hasUnmatchedGroups = true;
+      // TODO(brianwilkerson) Fix the ungrouped tokens?
     }
   }
 
   void _appendKeywordToken(Keyword keyword) {
     if (_firstComment == null) {
       _tail = _tail.setNext(new KeywordToken(keyword, _tokenStart));
     } else {
       _tail = _tail.setNext(new KeywordTokenWithComment(keyword, _tokenStart, _firstComment));
       _firstComment = null;
       _lastComment = null;
@@ skipping 1505 matching lines @@
    * @param precedingComment the first comment in the list of comments that precede this token
    */
   TokenWithComment(TokenType type, int offset, this._precedingComment) : super(type, offset);
 
   @override
   Token copy() => new TokenWithComment(type, offset, _precedingComment);
 
   @override
   Token get precedingComments => _precedingComment;
 }