Dmitry Petrov
28535a57d8
Given a singleton class 'S' with possibly uninitialized static instance
(enum entry, interface companion object).
Such singleton can be referenced by name, or as an explicit or implicit
'this'.
For a given singleton class 'S' we
either use 'this@S' from context (local or captured),
or 'S' as a static instance.
Local or captured 'this@S' should be used if:
- we are in the constructor for 'S',
and corresponding instance is initialized
by super or delegating constructor call;
- we are in any other member of 'S' or any of its inner classes.
Otherwise, a static instance should be used.
17 lines
288 B
Kotlin
Vendored
17 lines
288 B
Kotlin
Vendored
interface Callback {
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fun invoke(): String
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}
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enum class Foo(
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val x: String,
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val callback: Callback
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) {
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FOO(
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"OK",
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object : Callback {
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override fun invoke() = FOO.x
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}
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)
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}
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fun box() = Foo.FOO.callback.invoke() |