Great, thanks everyone. I will get the current unique ID from the capnp
tool and specify it explicitly for my struct before I do my refactoring.
On Wed, Nov 25, 2020, 5:26 PM Ian Denhardt <i...@zenhack.net> wrote:
> The ID doesn't affect the encoding itself, so the basic things will
> still work.
>
>
> You can avoid changing the id by specifying it explicitly, e.g.
>
> struct Bar 0xfeefefffefeefefe {
> val @0 :UInt32;
> }
>
> You can discover the current id by running:
>
> capnp compile -ocapnp myschema.capnp
>
> Which will output a version of the schema including the ids, as well as
> some other information.
>
> -Ian
>
> Quoting Matt Stern (2020-11-25 14:39:01)
> > Hi all,
> >
> > Suppose I have a simple schema file:
> >
> > 0xabbeabbeabbeabbe;
> >
> > struct Foo {
> >
> > val @0 : UInt32;
> >
> > };
> >
> > struct Bar {
> > val @1 : UInt32;
> > };
> >
> > I would like to move Bar into a separate schema file. If I understand
> > the [1]docs correctly, then this will change Bar's unique ID.
> >
> > I have two questions about that:
> >
> > 1. Will changing Bar's unique ID cause backwards incompatibility with
> > old messages that are serialized with the old ID?
> > 2. If so, what can I do to prevent this? I would like my change to
> > have no side-effects (a pure no-op).
> >
> > Thanks!
> >
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> > [3]
> https://groups.google.com/d/msgid/capnproto/aa247efb-ca69-40fa-97a7-
> > 415792fd0c1dn%40googlegroups.com.
> >
> > Verweise
> >
> > 1. https://capnproto.org/language.html#unique-ids
> > 2. mailto:capnproto+unsubscr...@googlegroups.com
> > 3.
> https://groups.google.com/d/msgid/capnproto/aa247efb-ca69-40fa-97a7-415792fd0c1dn%40googlegroups.com?utm_medium=email&utm_source=footer
>
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