there isnt a way to have `inline` within `interface` methods kotlinlang #announcements

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Title

e

elect

10/12/2018, 9:41 AM

there isnt a way to have

inline

within

interface

methods?

only private or final methods can have it

k

karelpeeters

10/12/2018, 9:42 AM

How would that work? The compiler needs to know the actual implementation.

e

elect

10/12/2018, 9:42 AM

I'd be fine if I could declare it as final

e

Egor Trutenko

10/12/2018, 9:43 AM

You basically can't declare

interface

method as

final

e

elect

10/12/2018, 9:44 AM

exactly, so there is no way, isn't?

e

elizarov

10/12/2018, 9:44 AM

You can write an extension function on your interface.

👍 2

e

Egor Trutenko

10/12/2018, 9:45 AM

To clarify, why do you actually need to declare an interface method

inline

?

e

elect

10/12/2018, 9:49 AM

for performances and since I have a lambda in the arguments it makes sense

e

Egor Trutenko

10/12/2018, 9:53 AM

No it doesn't. Should your call with lambda be inlined or not depends on implementation of that method

e

elect

10/12/2018, 10:02 AM

that's the thing, I don't want implement that method

I'm perfectly fine with the common base method

e

Egor Trutenko

10/12/2018, 10:14 AM

I don't understand. So you have an interface with default implementation that you don't want to override and which operates on abstract properties of that interface, right?

e

elect

10/12/2018, 10:21 AM

abstract class GLCanvas {

    ...

    @Throws(AWTException::class)
    abstract fun lock()

    @Throws(AWTException::class)
    abstract fun unlock()

    @Throws(AWTException::class)
    inline fun <R> lock(block: () -> R): R =
            try {
                lock()
                block()
            } finally {
                unlock()
            }
}

k

karelpeeters

10/12/2018, 10:22 AM

You can just make that an extension function.

e

elect

10/12/2018, 10:22 AM

.. yes

yeah, I know, I tried and worked flawless. However I found that I also have a common property.. that's why I switched to

abstract class

k

karelpeeters

10/12/2018, 11:35 AM

...

e

elect

10/12/2018, 12:17 PM

eh sorry 😄

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