Method DebugString

depends/protobuf/google/protobuf/descriptor.cc:1544–1601

}  // anonymous namespace

string FileDescriptor::DebugString() const {
  string contents = "syntax = \"proto2\";\n\n";

  for (int i = 0; i < dependency_count(); i++) {
    strings::SubstituteAndAppend(&contents, "import \"$0\";\n",
                                 dependency(i)->name());
  }

  if (!package().empty()) {
    strings::SubstituteAndAppend(&contents, "package $0;\n\n", package());
  }

  if (FormatLineOptions(0, options(), &contents)) {
    contents.append("\n");  // add some space if we had options
  }

  for (int i = 0; i < enum_type_count(); i++) {
    enum_type(i)->DebugString(0, &contents);
    contents.append("\n");
  }

  // Find all the 'group' type extensions; we will not output their nested
  // definitions (those will be done with their group field descriptor).
  set<const Descriptor*> groups;
  for (int i = 0; i < extension_count(); i++) {
    if (extension(i)->type() == FieldDescriptor::TYPE_GROUP) {
      groups.insert(extension(i)->message_type());
    }
  }

  for (int i = 0; i < message_type_count(); i++) {
    if (groups.count(message_type(i)) == 0) {
      strings::SubstituteAndAppend(&contents, "message $0",
                                   message_type(i)->name());
      message_type(i)->DebugString(0, &contents);
      contents.append("\n");
    }
  }

  for (int i = 0; i < service_count(); i++) {
    service(i)->DebugString(&contents);
    contents.append("\n");
  }

  const Descriptor* containing_type = NULL;
  for (int i = 0; i < extension_count(); i++) {
    if (extension(i)->containing_type() != containing_type) {
      if (i > 0) contents.append("}\n\n");
      containing_type = extension(i)->containing_type();
      strings::SubstituteAndAppend(&contents, "extend .$0 {\n",
                                   containing_type->full_name());
    }
    extension(i)->DebugString(1, &contents);
  }
  if (extension_count() > 0) contents.append("}\n\n");

  return contents;
}