Hey maybe somebody can help me I try to create a property with a list of elements where the element have to inherit from a specific class and has to implement a specific interface I ended up in sth like this `private val lt T gt buffer List lt T gt where T A T SomeInterface` Problem this is not working since `T` is not used in its receiver type can somebody help me with the correct syntax for my purpose

Hey, maybe somebody can help me: I try to create a property with a list of elements, where the element have to inherit from a specific class and has to implement a specific interface. I ended up in sth like this:

private val <T> buffer: List<T> where T : A, T : SomeInterface

Problem: this is not working since

is not used in "its receiver type" - can somebody help me with the correct syntax for my purpose?

Shawn

04/25/2019, 8:28 PM

you can’t really have call-site variance for vals

I’m not sure what you’re trying to do is possible in the first place

you may want a function instead, but I can’t say for sure

karelpeeters

04/25/2019, 8:33 PM

I think he wants an intersection type, not actual generics.

Shawn

04/25/2019, 8:34 PM

shame we can’t have

List<T | SomeInterface>

😕

karelpeeters

04/25/2019, 8:37 PM

More like

😒imple_smile:

rootandy

04/25/2019, 8:39 PM

no function is no option

Shawn

04/25/2019, 8:39 PM

@karelpeeters true

rootandy

04/25/2019, 8:40 PM

yes

private val buffer: List<A & SomeInterface>

would be another great option to show what I mean

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