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KT-10139:

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Non-exhaustive 'when' without 'else' used in expression is an error
regardless of expected type: it can't be an expression, even of type Unit.
This commit is contained in:
Dmitry Petrov
2015-11-27 18:35:02 +03:00
parent 1a3a296827
commit 76931affc6
12 changed files with 38 additions and 80 deletions
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compiler/testData/diagnostics/tests/controlStructures/ifWhenWithoutElse.kt
Vendored
+16 -3
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@@ -19,10 +19,10 @@ val xx6 = null ?: <!INVALID_IF_AS_EXPRESSION!>if (true) 42<!>
val xx7 = "" + <!INVALID_IF_AS_EXPRESSION!>if (true) 42<!>
val wxx1 = <!NO_ELSE_IN_WHEN!>when<!> { true -> 42 }
val wxx2: Unit = when { true -> <!CONSTANT_EXPECTED_TYPE_MISMATCH!>42<!> }
val wxx2: Unit = <!NO_ELSE_IN_WHEN!>when<!> { true -> <!CONSTANT_EXPECTED_TYPE_MISMATCH!>42<!> }
val wxx3 = idAny(<!NO_ELSE_IN_WHEN!>when<!> { true -> 42 })
val wxx4 = id(<!NO_ELSE_IN_WHEN!>when<!> { true -> 42 })
val wxx5 = idUnit(when { true -> 42 }) // TODO illegal expression
val wxx5 = idUnit(<!NO_ELSE_IN_WHEN!>when<!> { true -> 42 })
val wxx6 = null ?: <!NO_ELSE_IN_WHEN!>when<!> { true -> 42 }
val wxx7 = "" + <!NO_ELSE_IN_WHEN!>when<!> { true -> 42 }
@@ -40,11 +40,24 @@ val ufn4: () -> Unit = { when { true -> <!UNUSED_EXPRESSION!>42<!> } }
val ufn5: () -> Unit = { when { true -> mlist.add() } }
val ufn6: () -> Unit = { when { true -> work() } }
fun f1() = <!INVALID_IF_AS_EXPRESSION!>if (true) work()<!>
fun f2() = <!INVALID_IF_AS_EXPRESSION!>if (true) mlist.add()<!>
fun f3() = <!INVALID_IF_AS_EXPRESSION!>if (true) 42<!>
fun f4(): Unit = <!INVALID_IF_AS_EXPRESSION!>if (true) work()<!>
fun f5(): Unit = <!INVALID_IF_AS_EXPRESSION!>if (true) mlist.add()<!>
fun f6(): Unit = <!INVALID_IF_AS_EXPRESSION!>if (true) 42<!>
fun g1() = <!IMPLICIT_CAST_TO_UNIT_OR_ANY!><!NO_ELSE_IN_WHEN!>when<!> { true -> work() }<!>
fun g2() = <!NO_ELSE_IN_WHEN!>when<!> { true -> mlist.add() }
fun g3() = <!NO_ELSE_IN_WHEN!>when<!> { true -> 42 }
fun g4(): Unit = <!NO_ELSE_IN_WHEN!>when<!> { true -> work() }
fun g5(): Unit = <!NO_ELSE_IN_WHEN!>when<!> { true -> <!TYPE_MISMATCH!>mlist.add()<!> }
fun g6(): Unit = <!NO_ELSE_IN_WHEN!>when<!> { true -> <!CONSTANT_EXPECTED_TYPE_MISMATCH!>42<!> }
fun foo1(x: String?) {
"" + <!INVALID_IF_AS_EXPRESSION!>if (true) 42<!>
w@while (true) {
x ?: if (true) break
x ?: <!NO_ELSE_IN_WHEN!>when<!> { true -> break@w }
x ?: when { true -> break@w }
}
}