Repo for extremely slow 'const'.

frog/code_writer.dart

 // Copyright (c) 2011, 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.
 
 /**
  * Support for generating code to be extended with source location mapping.
  */
 class CodeWriter {
   static final INDENTATION = '  ';
 
   static final int INC_INDENT = +1;
   static final int DEC_INDENT = -1;
-  static final NEWLINE = null;       // Anything but an int, String or List.
+  static final NEWLINE = const Newline();
 
   List _buf;
   bool writeComments = true;
 
   CodeWriter(): _buf = [];
 
   bool get isEmpty() => _buf.length == 0;
 
   String get text() {
     StringBuffer sb = new StringBuffer();
@@ skipping 77 matching lines @@
     writeln(text);
   }
 
   /** Switch to an adjacent block in one line, e.g. "} else if (...) {" */
   nextBlock(String text) {
     _buf.add(DEC_INDENT);
     writeln(text);
     _buf.add(INC_INDENT);
   }
 }
+
+class Newline {
+  const Newline();
+}