Can I create KType from reified T

Question

I use reified generics to capture KClass<>

inline fun <reified T> register(generator: Generator<T>) {
    register(T::class, generator)
}

But KType has some additional properties which are interesting to me like nullability. I would like to write something like this to capture the KType instead.

inline fun <reified T> register(generator: Generator<T>) {
    register(T::ktype, generator) // Doesn't compile
}

...

register<String?>(myGen) // The nullability of String? is captured

Is there someway to capture KType instead of KClass<>?

Thanks in advance.

score 3 · Accepted Answer · edited May 23 '17 at 12:17

3

No, as for now, this cannot be done, there is an issue in the Kotlin issue tracker about it, currently marked as To be discussed.

You can, however, get more than just KClass<T> from the reified type parameter using subclassing and, in particular, the technique called super type tokens.

edited May 23 '17 at 12:17

Community

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answered Mar 14 '17 at 23:24

hotkey

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Thanks. I wasn't aware of the super type tokens. This is something I will investigate. Looks like it can be good enough for my use case. – Just another metaprogrammer Mar 15 '17 at 11:37
It looks like super type tokens only work in Kotlin/JVM and not in Kotlin/Common though? – CLOVIS Apr 10 '19 at 05:19

Can I create KType from reified T

1 Answers1