Fix for issue 1835: record the 'final' information in the DeclaredIdentifier.

frog/scripts/tree_gen.py

 #!/usr/bin/env python
 # 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.
 
 '''Generates the many subtypes of Node as well as a NodeVisitor into
    tree.g.dart.'''
 
 from codegen import CodeWriter
 
@@ skipping 191 matching lines @@
   Node('Case',
     'Identifier label, List<Expression> cases, List<Statement> statements'),
 
   # Don't want to add Node to these names, use ! as convention to say so.
   Node('TypeParameter!', 'Identifier name, TypeReference extendsType'),
 
   # TODO(jimhug): Consider removing this node and just using String.
   Node('Identifier!', 'String name'),
 
   # Pseudo Expression for cover grammar approach
-  Expression('DeclaredIdentifier!', 'TypeReference type, Identifier name'),
+  Expression('DeclaredIdentifier!',
+             'TypeReference type, Identifier name, bool isFinal'),
 ]
 
 def main():
   cw = CodeWriter(__file__)
 
   for node in nodes:
     node.write(cw)
     cw.writeln()
 
   cw.writeln()
@@ skipping 10 matching lines @@
   cw.writeln('var output;')
   cw.writeln('TreePrinter(this.output) { output.printer = this; }')
   for node in nodes:
     node.writePrettyPrintMethod(cw)
     cw.writeln()
   cw.exitBlock('}')
 
   cw.writeToFile('tree')
 
 if __name__ == '__main__': main()