I've been playing with this a bit and the closest I've been able to get is
constructing a new message with the AnyPointer at the root. That, however,
prepends a struct pointer to the whole thing. I can just chop it off, but
I'm thinking there must be a better way.
auto msg = context.getParams().getMsg(); // AnyPointer
MallocMessageBuilder messageBuilder;
messageBuilder.setRoot(msg);
auto flatWordsArray = messageToFlatArray(messageBuilder);
auto byteArray = flatWordsArray.asBytes();
~John
On Thursday, May 14, 2020 at 11:30:38 PM UTC-7, John Demme wrote:
>
> Hi-
>
> In the C++ API, is there an (easy) way to get the binary encoded message
> of an AnyPointer field? Or a generic field? (If I understand, they're
> encoded the same under the hood.) I don't think anyPointer->getAs<Data>()
> would work, would it?
>
> The background here is that I'm trying to write a generic proxy for
> CapnProto messages using CapnProto RPC. Since I'm not re-compiling the
> proxy itself, it cannot know the possible types for AnyPointer. Since
> messages don't need any schema data to be traversed (though not
> interpreted) correctly, this *should *be possible.
>
> To be more concrete:
> interface ProxyChannel {
> send @0 (msg :AnyPointer);
> recv @1 () -> (respMsg :AnyPointer);
> }
>
> I'm using :Data instead of :AnyPointer now, but that puts a unnecessary
> burden on the clients.
>
> ~John
>
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