Auto generate UseCounter::Feature enum from an .in file

Source/build/scripts/in_file.py

 # Copyright (C) 2013 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 114 matching lines @@
         if '=' in line:
             name, value = line.split('=')
         else:
             name, value = line, True
         if not name in self.parameters:
             self._fatal("Unknown parameter: '%s' in line:\n%s\nKnown parameters: %s" % (name, line, self.parameters.keys()))
         self.parameters[name] = value
 
     def _parse_line(self, line):
         args = copy.deepcopy(self._defaults)
+        line = line.split('//')[0]  # remove comments

[haraken, 2014/11/24 09:38:49]

I'm not sure but we might want to use '#' instead of '//' for a comment.

[philipj_slow, 2014/11/24 10:44:59]

Also, isn't there already some code for handling // at the beginning of a line
that should be removed if this bit is added?

         parts = line.split(' ')
         args['name'] = parts[0]
         # re-join the rest of the line and split on ','
         args_list = ' '.join(parts[1:]).strip().split(',')
         for arg_string in args_list:
             arg_string = arg_string.strip()
             if not arg_string: # Ignore empty args
                 continue
             if '=' in arg_string:
                 arg_name, arg_value = arg_string.split('=')
             else:
                 arg_name, arg_value = arg_string, True
             if arg_name not in self._defaults:
                 self._fatal("Unknown argument: '%s' in line:\n%s\nKnown arguments: %s" % (arg_name, line, self._defaults.keys()))
             valid_values = self._valid_values.get(arg_name)
             if valid_values and arg_value not in valid_values:
                 self._fatal("Unknown value: '%s' in line:\n%s\nKnown values: %s" % (arg_value, line, valid_values))
             if self._is_sequence(args[arg_name]):
                 args[arg_name].append(arg_value)
             else:
                 args[arg_name] = arg_value
         return args
 
     def _fatal(self, message):
         # FIXME: This should probably raise instead of exit(1)
         print message
         exit(1)