Allow containers to specify their own serialization #604
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This PR allows containers to specify how to write to and read from
Bytes
. This should open the door up to custom zero-copy implementations, as should be allowed bycolumnar
. I haven't prototyped that up yet, and we may learn about the container trait when doing so (right now: one container for both send and recv; should be workable, but this will let us test).Design-wise, not in love with the new trait, but it allows us to provide implementations for containers here, rather than e.g. in
communication
, or (probably where they belong) incontainer
after bringing in dependencies onbincode
and the like. Up for discussing that, but I think we just need a trait somewhere, and implementations very near by. Otherwise, we need to have some wrappers and rework a lot of code, which doesn't sound as good.