Add the ability to code generated prepopulated static nested structs

tools/json_to_struct/struct_generator.py

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 def _GenerateArrayField(field_info):
   """Generate a string defining an array field in a C structure.
   """
   contents = field_info['contents']
   contents['field'] = '* ' + field_info['field']
   if contents['type'] == 'array':
@@ skipping 10 matching lines @@
   if type == 'int':
     return 'const int %s' % field
   elif type == 'string':
     return 'const char* const %s' % field
   elif type == 'string16':
     return 'const wchar_t* const %s' % field
   elif type == 'enum':
     return 'const %s %s' % (field_info['ctype'], field)
   elif type == 'array':
     return _GenerateArrayField(field_info)
+  elif type == 'object':

[beaudoin, 2015/07/06 16:01:12]

Would 'struct' be better than 'object' given that "object" typically refers to
an instance and here we're talking about the type. Also, object makes me think
of 'class' rather than 'struct'. Anyway, your call.

[danduong, 2015/07/08 23:07:03]

Done.

+    return 'const %s %s' % (field_info['type_name'], field)
   else:
     raise RuntimeError('Unknown field type "%s"' % type)
 
 def GenerateStruct(type_name, schema):
   """Generate a string defining a structure containing the fields specified in
   the schema list.
   """
   lines = [];
   lines.append('struct %s {' % type_name)
   for field_info in schema:
+    if field_info['type'] == 'object':
+      lines.insert(0, GenerateStruct(field_info['type_name'],
+                                     field_info['fields']))
+    elif (field_info['type'] == 'array'
+          and field_info['contents']['type'] == 'object'):
+      contents = field_info['contents']
+      lines.insert(0, GenerateStruct(contents['type_name'],
+                                     contents['fields']))
     lines.append('  ' + GenerateField(field_info) + ';')
   lines.append('};');
   return '\n'.join(lines) + '\n';