Files
kotlin-fork/compiler/testData/diagnostics/tests/inference/tooEagerSmartcast.fir.kt
T
Denis.Zharkov 715a73c8fb K2: Support inference case with a mix of smart-cast and expected type
The idea is that we should not fix (i.e. choose any of the fork branches)
on the stage of candidate processing before completion, but it's enough
just to check that current state can be converged to success.

And when completion starts, and we add expected type to the system,
we've got more information to choose the correct fork branch.

NB: The old `processForkConstraints` is being called just
at the beginning of the completion phase.

^KT-43296 In Progress
2022-11-24 17:29:28 +00:00

42 lines
883 B
Kotlin
Vendored

// SKIP_TXT
// !DIAGNOSTICS: -UNUSED_VARIABLE
interface OutBase<out E>
interface OutDerived<out F> : OutBase<F>
fun <X> OutBase<X>.myLast(): X = TODO()
fun <T> foo(x: OutBase<T>) {
if (x is OutDerived<*>) {
val l: T = x.myLast() // required T, found Cap(*). Only in NI
}
}
interface InvBase<E>
interface InvDerived<F> : InvBase<F>
fun <X> InvBase<X>.myLastInv(): X = TODO()
fun <T> fooInv(x: InvBase<T>) {
if (x is InvDerived<*>) {
val l: T = x.myLastInv() // required T, found Cap(*). Only in NI
}
}
interface Base<E>
fun <Q> Base<Q>.foo(): Q = TODO()
fun <Q : CharSequence> Base<Q>.baz(): Q = TODO()
interface Derived<F : CharSequence> : Base<F>
fun Number.num() {}
fun main(b: Base<out Number>) {
b.foo().num()
if (b is Derived<*>) {
b.foo().<!UNRESOLVED_REFERENCE_WRONG_RECEIVER!>num<!>()
b.baz().length
}
}