Can proto3 messages talk to applications using proto2?

[Nadder Makhlouf]

I'm doing some porting to a new platform and I want to explore building my latest libraries with newer protobuf version. Hoowever, there can still be some applications using old proto2 versions.

Will there be any problem to communicate with the applications using protobuf versions 2.x from an application using newer protobuf version 3.x?

[Matthew Fowles Kulukundis]

Nadder~

proto2 and proto3 messages can safely co-exist in the same process.  It is better not to think of them as "versions" and more as "dialects".

Matt

On Thu, Sep 28, 2023 at 11:14 AM Nadder Makhlouf <chefjoe...@gmail.com> wrote:

I'm doing some porting to a new platform and I want to explore building my latest libraries with newer protobuf version. Hoowever, there can still be some applications using old proto2 versions.

Will there be any problem to communicate with the applications using protobuf versions 2.x from an application using newer protobuf version 3.x?

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[Nadder Makhlouf]

Hi Matt,

Thanks for your response. That sounds good, it will make my development hopefully simple then.