what to replace with in kotlin when we don t know what will kotlinlang #announcements

what to replace ? with in kotlin when we don’t know what will type be at runtime and it’s definition isn’t gonna participate in any method signature of this interface

adamd

09/10/2019, 3:30 PM

have you tried

Any

nimtiazm

09/10/2019, 3:49 PM

yes it’s a recursive bound. to keep it open I use ? in java

using Any is similar to using star projection. so it doens’t work

T and U are simply input and output in one CStage and U is input in another CStage where output is unknown

actually in the interface, the method signatures utilize T, U and N only so it works out nicely

yes

It has to be this way because U (output) from first CStage replaces T (input) in second CStage

i’m using it without any problem.

if i use

CStage<T, U, N: CStage<U, *, N>>

i can’t use any other CStage for N

Kroppeb

09/10/2019, 8:32 PM

@Ruckus T and U aren't bound together though?

nimtiazm

09/11/2019, 7:44 AM

no there are no bounds for T and U

only N is recursively bound because it has to implement CStage

Kroppeb

09/11/2019, 8:35 AM

lol did he delete all his msgs?

Ruckus

09/11/2019, 3:23 PM

@Kroppeb Yes, I did. Sorry about that. I was getting frustrated with the conversation and didn't want to get any more notifications for it. I was operating under the false impression that deleting my comments would unsubscribe me from this thread. On the bright side, I have now discovered the (very large and obvious) "Unfollow thread" action.

#announcements Join Slack