Fill message with oneof data

[Aleh Linkin]

I have protobuf:
message Msg

{

oneof type {

   Msg1 msg1 = 1;

   Msg2 msg2 = 2;

   Msg3 msg3 = 3;

....

}

};

Is it possible to fill Msg with protobuf::Message from one of msgs?
Like:

msg1 m1;

//fill m1;

f(&m1);

msg2 m2;

//fill m2;

f(&m2);

...

void f(google::protobuf::Message *m)

{

Msg mainMessage;

// fill mainMessage with data from m correctly? <---

}

I tried CopyFrom but it doesn't work in this case.

Thank you.

[Deanna Garcia]

What language are you working in?

I don't think any copying is necessary, you can just build Msg like you would any other message and set the value of type to m1 or m2.