Ian is correct: These numbers are a Cap'n Proto encoding of your schema file, which includes names, so they will always change when you modify the file. But, that doesn't mean there's any incompatibility.
-Kenton On Wed, Feb 21, 2018 at 10:39 AM, <[email protected]> wrote: > Per capnp "evolving your schema" we tried changing the name of a struct > but keeping its id the same e.g. changing this: > > struct MyMessageList { > mList @0: List(MyMessage); > } > > struct MyMessage { > field0 @0: Int32; > } > > to this: > > struct MyMessageList { > mList @0: List(DeprectedMyMessage); > } > > struct DeprectedMyMessage @0xd4201303ceef0b19 { > field0 @0: Int32; > } > > > We found that the generated header files were the same (modulo the name > change), but that the data section in the c++ files had changed values, > which was worrisome. For example: > > static const ::capnp::_::AlignedData<58> b_b23f9d28332a82cf = { > | static const ::capnp::_::AlignedData<59> > b_b23f9d28332a82cf = { > static const ::capnp::_::AlignedData<58> b_b23f9d28332a82cf = { > | static const ::capnp::_::AlignedData<59> > b_b23f9d28332a82cf = { > { 0, 0, 0, 0, 5, 0, 6, 0, > { 0, 0, 0, 0, 5, 0, 6, 0, > 207, 130, 42, 51, 40, 157, 63, 178, > 207, 130, 42, 51, 40, 157, 63, 178, > 50, 0, 0, 0, 2, 0, 0, 0, > | 60, 0, 0, 0, 2, 0, 0, 0, > 171, 205, 79, 88, 213, 104, 54, 210, > 171, 205, 79, 88, 213, 104, 54, 210, > 0, 0, 0, 0, 0, 0, 0, 0, > 0, 0, 0, 0, 0, 0, 0, 0, > 0, 0, 0, 0, 0, 0, 0, 0, > 0, 0, 0, 0, 0, 0, 0, 0, > 21, 0, 0, 0, 50, 2, 0, 0, > | 21, 0, 0, 0, 130, 2, 0, 0, > 53, 0, 0, 0, 7, 0, 0, 0, > | 57, 0, 0, 0, 7, 0, 0, 0, > 0, 0, 0, 0, 0, 0, 0, 0, > 0, 0, 0, 0, 0, 0, 0, 0, > 49, 0, 0, 0, 175, 0, 0, 0, > | 53, 0, 0, 0, 175, 0, 0, 0, > > Is it expected that the data section would change in this way? Does it > affect the serialization / deserialization in a safe or unsafe way? What is > the data section encoding anyway? > > > > -- > You received this message because you are subscribed to the Google Groups > "Cap'n Proto" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > Visit this group at https://groups.google.com/group/capnproto. > -- You received this message because you are subscribed to the Google Groups "Cap'n Proto" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. Visit this group at https://groups.google.com/group/capnproto.
