I meant something like:
message Header {
string account = 1;
string symbol = 1;
}
message Msg1 {
Header header = 1;
...
}
message Msg2 {
Header header = 1;
...
}
On Wed, Oct 19, 2016 at 12:42 PM, Saurabh Kumar <[email protected]>
wrote:
> Thanks for the reply. What exactly do you mean by common header?
>
> On Thu, 20 Oct 2016 at 1:06 AM, Feng Xiao <[email protected]> wrote:
>
>>
>>
>> On Wed, Oct 19, 2016 at 4:03 AM, Saurabh Kumar <[email protected]>
>> wrote:
>>
>> Hi,
>>
>> This question is regarding inheritance in protobuf C++ library. I will
>> explain what I am looking for with a concrete example.
>>
>> I have this message definition:
>>
>> message MSG1
>> {
>> required string account = 0;
>> required string symbol = 1;
>> }
>>
>> Now I want to extend this message and define a new message like this:
>> message MSG2
>> {
>> required string account = 0;
>> required string symbol = 1;
>> required int32 id = 2;
>> }
>>
>> You will notice that first two fields of MSG2 are exactly same as MSG1
>> (they are intended to be like that). But here I had to copy paste the
>> common fields again.
>> Can I do something like this?
>>
>> message MSG2 extends MSG1
>> {
>> required int32 id = 2;
>> }
>>
>> I have already thought about using it like:
>> message MSG2
>> {
>> required MSG1 msg1 = 0;
>> required int32 id = 2;
>> }
>> But this is not really what I want.
>>
>> What's the best way to achieve this?
>>
>> Protobuf doesn't support inheritance. Having a common header and using
>> composition is the best solution.
>>
>>
>>
>> Thanks,
>> Saurabh
>>
>> --
>> You received this message because you are subscribed to the Google Groups
>> "Protocol Buffers" group.
>> To unsubscribe from this group and stop receiving emails from it, send an
>> email to [email protected].
>> To post to this group, send email to [email protected].
>> Visit this group at https://groups.google.com/group/protobuf.
>> For more options, visit https://groups.google.com/d/optout.
>>
>> --
> You received this message because you are subscribed to the Google Groups
> "Protocol Buffers" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to [email protected].
> To post to this group, send email to [email protected].
> Visit this group at https://groups.google.com/group/protobuf.
> For more options, visit https://groups.google.com/d/optout.
>
--
You received this message because you are subscribed to the Google Groups
"Protocol Buffers" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at https://groups.google.com/group/protobuf.
For more options, visit https://groups.google.com/d/optout.
