Hello, Word! I was wondering if there's any way to...
# announcementsb
bod
12/02/2018, 4:40 PMHello, Word! I was wondering if there's any way to craft a Java method in such a way that it can be called in Kotlin like a "function literals with receiver". So I could call
myObj.foo { bar() }barfooa
Andreas Sinz
12/02/2018, 4:52 PMI don't think that is easily possible, why do you need that?
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bod
12/02/2018, 4:53 PMit's just that I make a Java library, but I want it to also be Kotlin friendly
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twisterrob
12/02/2018, 4:53 PMwouldn't it be possible to write in Kotlin? As Java users can still call those methods
twisterrob
12/02/2018, 4:54 PMreceiver is a concept in Kotlin, even if it's possible, you'll probably need some Kotlin annotation from stdlib, so you might as well declare the surface API in Kotlin
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bod
12/02/2018, 4:54 PMhmm that's true but then I need to make it depend on the Kotlin stdlib - and since it's a small library that's a bit "too much"
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twisterrob
12/02/2018, 4:56 PMyou can try to see what metadata annotations are attached when declaring a lambda with receiver in the class files and mimic that from Java, I never tried to hack around with this yet.
twisterrob
12/02/2018, 4:56 PMjavapb
bod
12/02/2018, 4:56 PMI guess I could just add extensions to a kotlin specific optional dependency.... 😛
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twisterrob
12/02/2018, 5:00 PMyeah, that's what everyone does 🙂
twisterrob
12/02/2018, 5:02 PMbe careful with overloading a member from an extension; member always wins; if it doesn't work you may need to introduce a new name for kt
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bod
12/02/2018, 5:02 PMoh thanks for the tip! 🙂
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twisterrob
12/02/2018, 5:03 PM