On Wednesday, June 17, 2020 at 2:00:00 PM UTC-7, Denis Cheremisov wrote:
>
> Another question about generics, a HOWTODO one: I am bored to death
> writing methods what would send one request and get one response from a
> gRPC bistream. Decided to try a draft 2 against a generic approach to the
> task.
>
> My final attempt which I still can't compile:
> https://go2goplay.golang.org/p/z8XUKua3k-J
>
> Where is the mistake?
>
Your ReadOne function takes three type parameters: S, Input, and Output.
Since S has a constraint, Input and Output also need a constraint (which
can just be interface{}).
> func ReadOne(type S Stream(Input, Output), Input interface{}, Output
interface{})(...) (...)
I also had to add explicit type arguments to the call to ReadOne since the
compiler complains that the type of Output can't be inferred.
> res, err := ReadOne(*dummyStream, int, int)(nil, getStream, 13)
https://go2goplay.golang.org/p/RQEyhRRQb0p
Cheers,
Andrew Ekstedt
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