Georgi Krastev

Add Encoder.derived and Codec.derived forwarders

1

So that users can express `derives Encoder` and `derives Codec`. This is more appropriate for generic enums and case classes. Closes #2227

Delay sending headers

6

gRPC has a configurable retry mechanism, however it's disabled once the headers are sent. Because it's assuming that at this point the client state may have changed. https://github.com/grpc/proposal/blob/master/A6-client-retries.md#when-retries-are-valid > gRPC...

Backports #19343 to 3.3 Fix #7092

This means we can't use simulacrum-scalafix to prepare [cats-tagless](https://github.com/typelevel/cats-tagless) for dotty support 😢 ### Example ```scala @typeclass trait FunctorK[A[_[_]]] extends InvariantK[A] { def mapK[F[_], G[_]](af: A[F])(fk: F ~> G): A[G]...

Most of the extension methods couldn't be abstracted

Support Mirror.Product for Java records

2

With Java 17 records are mainstream so it would be nice to support generic derivation with shapeless.

Since Java 17 we can define classes as sealed

Structural types in Scala 3 work without reflection (see `Selectable`). It would be nice to support generic derivation for structural types.