thank you for your explanation
Ilia Mirkin於 2014年7月25日星期五UTC+8上午7時41分57秒寫道：
>
> On Thu, Jul 24, 2014 at 7:38 PM, ching lu <lsch...@gmail.com <javascript:>>
> wrote:
> > Previous example is not good
> >
> > mssage {
> >
> > required bool x1 = 1;
> > required bool x2 = 2;
> > required bool x3 = 3;
> > required bool x4 = 4;
> > required bool x5 = 5;
> > required bool x6 = 6;
> > required bool x7 = 7;
> > required bool x8 = 8;
> > required bool x9 = 9;
> > required bool x10 = 10;
> > required bool x11 = 11;
> > required bool x12 = 12;
> > required bool x13 = 13;
> > required bool x14 = 14;
> > required bool x15 = 15;
> > optional bool y = 16;
> >
> > }
> >
> > will it take 16 byte or 16 bit for the message? There is no
> documentation
> > for the behaviour of bit field
>
> AFAIK there's no boolean wire type, so they're just varints that
> happen to only take on 0/1 values (and provide the appropriate
> language bindings). So 16 bytes.
>
> And that's because your field id's are < 16. Once you go over 16,
> it'll be 2 bytes per field (i.e. the tag will take up a full byte, and
> then the value will be another byte).
>
> -ilia
>
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