Hi,
Given a .proto file used with proto2 to generate code to send messages, is
it feasible to use proto3 on the same .proto file to receive
messages--assuming I alter the .proto file to be proto3 compatible?
In particular, if I fix the following (which currently are errors I get
when compiling the .proto file in proto3), then receiving messages should
work, right?
Don't use "required" or "optional".
Make sure enums have a zero element as the first item.
Don't use explicit default values.
Do not use "group".
(These are the only errors I have.)
The one I am having real doubts and questions about is getting rid of
"group". Using the example in the docs, I have to take something like this:
message SearchResponse {
repeated group Result = 1 {
required string url = 2;
optional string title = 3;
repeated string snippets = 4;
}
}
and make it like this:
message SearchResponse {
message Result {
required string url = 1;
optional string title = 2;
repeated string snippets = 3;
}
repeated Result result = 1;
}
But this may redefine what is expected in the data over the wire. So I
wonder what the best way is to replace "group" to be backward compatible.
BTW, my goal is to generate C#. That's why I am using proto3.
Thanks.
Scobe
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