It turns out that the output bytes for proto3 are different from those for
proto2. I fix it now.
在2020年7月17日星期五 UTC+8 下午5:05:20<Chan Lewis> 写道：
> Let's say I have a message:
>
> ```
> message Meta {
> string a = 1;
> int64 b= 2;
> }
> ```
>
> Somebody serializes the message with C++ like this:
>
> ```cpp
> Meta meta;
>
> char header_and_meta[meta_size];
> ::google::protobuf::io::ArrayOutputStream arr_out(header_and_meta,
> meta_size);
> ::google::protobuf::io::CodedOutputStream coded_out(&arr_out);
> meta.SerializeWithCachedSizes(&coded_out);
> ```
>
> Now I need to translate above code to golang equivalent code, but I don't
> see equivalent struct in golang. I use *proto.Marshal(meta)*, but the
> result of type []byte, is not totally same as data within
> *header_and_meta*
>
> Anything wrong ?
>
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