func fillTreeWithField(tree *tree, parent string, proto *descriptor.FieldDescriptorProto, loc string, locs map[string]*descriptor.SourceCodeInfo_Location) *field {
key := fmt.Sprintf("%s.%s", parent, proto.GetName())
tree.fields[key] = &field{key: key, comment: getComment(loc, locs), FieldDescriptorProto: proto}
if proto.GetLabel() == descriptor.FieldDescriptorProto_LABEL_REPEATED {
tree.fields[key].repeated = true
}
if proto.OneofIndex != nil {
if parent, ok := tree.messages[parent]; ok {
for _, oneof := range parent.oneofs {
if oneof.index == proto.GetOneofIndex() {
oneof.fields = append(oneof.fields, tree.fields[key])
tree.fields[key].isOneOf = true
}
}
}
}
return tree.fields[key]
}
