Is there a way to limit function invocation using ...

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[edwardwongtl]

Is there a way to limit function invocation using something like fun doSth(action: Mode.() -> Unit)?
But Mode contains only functions, no properties.
Although it is completely fine to create instance of Mode and pass it to action(mode), it just doesn't quite make sense for me to create such a instance.

[gildor]

limit function invocation?

[edwardwongtl]

One example would be one can only invoke add, minus inside fun doSth

[edwardwongtl]

fun doSth(action: Mode.() -> Unit) { ... }
doSth {
  add() // OK
  minus() // OK
  multiple() // Not ok
}

[gildor]

mm, maybe do not add multiply to Mode interface?

[gildor]

Or I didn’t get your case

[edwardwongtl]

That's what I want to do, but I just can't figure out a nice way to do it

[gildor]

Imo nice way: use different interface hierarchy depending on case

[edwardwongtl]

Cause I need to do

fun doSth(...) {
  action(mode) // Don't want to pass in mode
}

[edwardwongtl]

Cause Mode consist of pure functions, I'm just using it for function grouping purpose in this case.

[edwardwongtl]

You mean using interface Mode instead of class Mode?

[gildor]

I mean something like that:

class/interface Mode {
  fun add()
  fun minus()
}

class MultipleMode: Mode {
   fun multiple()
}

[edwardwongtl]

I see, that lights me up