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kotlin-fork/compiler/testData/diagnostics/tests/when/ExhaustiveWithNullabilityCheck.kt
T
2020-03-30 11:15:52 +03:00

21 lines
683 B
Kotlin
Vendored

/*
* RELEVANT SPEC SENTENCES (spec version: 0.1-152, test type: pos):
* - expressions, when-expression -> paragraph 5 -> sentence 1
* - expressions, when-expression, exhaustive-when-expressions -> paragraph 2 -> sentence 9
* - type-inference, smart-casts, smart-cast-types -> paragraph 9 -> sentence 1
*/
// KT-7857: when exhaustiveness does not take previous nullability checks into account
enum class X { A, B }
fun foo(arg: X?): Int {
if (arg != null) {
return when (<!DEBUG_INFO_SMARTCAST!>arg<!>) {
X.A -> 1
X.B -> 2
// else or null branch should not be required here!
}
}
else {
return 0
}
}