These are only scalars that you'd encode into bytes. I guess it's slightly annoying that both ends have to agree on how to serialize rather than protobuf itself doing it, but it's not a big enough problem.
Also I don't see special ASN1 support for non-Unicode string encodings, only subsets of Unicode like ascii or printable ascii. It's a big can of worms once you bring in things like Latin-1.
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These are only scalars that you'd encode into bytes. I guess it's slightly annoying that both ends have to agree on how to serialize rather than protobuf itself doing it, but it's not a big enough problem.
Also I don't see special ASN1 support for non-Unicode string encodings, only subsets of Unicode like ascii or printable ascii. It's a big can of worms once you bring in things like Latin-1.