message->GetReflection()->MutableUnknownFields() should get you
a UnknownFieldSet. I believe you can manipulate that.
https://developers.google.com/protocol-buffers/docs/reference/cpp/google.protobuf.unknown_field_set#UnknownFieldSet.


On Fri, Feb 7, 2014 at 2:52 AM, Gregory Hlavac <ghla...@gmail.com> wrote:

> I'm rewriting a JSON <-> Protobuf bridge and I want to allow it to handle
> unknown fields in the JSON but for the life of me I can't figure out how to
> set unknown fields with C++.
>
>
> Another thing I've noticed is
>
> string *
> *mutable_length_delimited*()
> Is that an unknown string field? Because its named oddly.
>
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