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kotlin-fork/compiler/testData/diagnostics/tests/when/ExhaustiveNullable.kt
T

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Kotlin
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/*
* KOTLIN DIAGNOSTICS SPEC TEST (POSITIVE)
*
* SPEC VERSION: 0.1-313
* PRIMARY LINKS: expressions, when-expression -> paragraph 5 -> sentence 1
* expressions, when-expression, exhaustive-when-expressions -> paragraph 2 -> sentence 9
* expressions, when-expression, exhaustive-when-expressions -> paragraph 2 -> sentence 10
* control--and-data-flow-analysis, performing-analysis-on-the-control-flow-graph, variable-initialization-analysis -> paragraph 2 -> sentence 1
* control--and-data-flow-analysis, performing-analysis-on-the-control-flow-graph, variable-initialization-analysis -> paragraph 2 -> sentence 3
*/
enum class MyEnum {
A, B
}
fun foo(x: MyEnum?): Int {
val y: Int
// See KT-6046: y is always initialized
<!DEBUG_INFO_IMPLICIT_EXHAUSTIVE!>when (x) {
MyEnum.A -> y = 1
MyEnum.B -> y = 2
null -> y = 0
}<!>
return y
}