another case where this would be useful https://github.com/kelbon/AnyAny ))

ср, 27 июл. 2022 г. в 22:40, Emile Cormier via Std-Proposals <
std-proposals_at_[hidden]>:

> (Cross-posted to https://github.com/chriskohlhoff/asio/issues/1100)
>
> In the upcoming C++ networking proposal, we need a wrapper that
> type-erases an asynchronous handler and bundles its associated executor and
> allocator. This would prevent the forcing of higher-level networking
> libraries to be header-only. It would also allow such higher-level
> networking libraries to expose known types in its API, instead of
> templatized function arguments.
>
> This proposed type-erased handler could be passed to asio::post and the
> like. It would also have to support underlying handlers that are move-only.
>
> Some of us still care about compile times and being able to apply the
> Pimpl idiom. This is not possible when our libraries are forced to be
> header-only because of Asio wanting everything to be a template.
>
> I have found such a wrapper in the wild at
> https://github.com/inetic/asio-utp/blob/master/include/asio_utp/detail/handler.hpp
> . However it lacks small buffer optimization and has additional stuff that
> seems specific to that library.
>
> Cheers,
> Emile Cormier
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