I see, I guess the compiler error message needs improvement here. It could mention that interfaces with type lists cannot be used.
On Thursday, September 10, 2020 at 5:17:57 PM UTC+2 rog wrote: > You can definitely use parametric interfaces in type assertion > expressions, but you can't use interfaces with type lists. > I'm not sure exactly what you're trying to do in your example, but ISTM > that it could be somewhat simpler. You > only need one type parameter: https://go2goplay.golang.org/p/4E0ZnVxJwL9 > > > On Thu, 10 Sep 2020 at 15:54, Viktor Kojouharov <vkojo...@gmail.com> > wrote: > >> >> Would using parametric interfaces be allowed in type assertion >> expressions / type switches? >> >> The current behavior in the go2go playground is for the compiler to >> return the error: "interface contains type constraints (T)" ( >> https://go2goplay.golang.org/p/O1Un2Vm9Dh0) >> I was under the impression that since the outer function is already >> parametrised with the same type, this should work without a problem. >> >> Perhaps I'm missing something, but I currently don't see how one can >> check for optional interface implementations of generic types, since this >> error will pretty much stop them. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "golang-nuts" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to golang-nuts...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/golang-nuts/fbe50aaf-1794-4a17-9321-2b923f546d13n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/golang-nuts/fbe50aaf-1794-4a17-9321-2b923f546d13n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/10d006bf-2fa7-4d09-bcfc-1b9c0e0eb525n%40googlegroups.com.
