[FE 1.0] Report warning on non-exhaustive when statements only after 1.6

^KT-47709
2021-07-21 10:50:39 +03:00
parent 865ad3698b
commit a710a8d10f
33 changed files with 489 additions and 21 deletions
@@ -0,0 +1,154 @@
+// !LANGUAGE: -WarnAboutNonExhaustiveWhenOnAlgebraicTypes -ProhibitNonExhaustiveWhenOnAlgebraicTypes
+
+enum class SomeEnum {
+    A, B
+}
+
+sealed class Base {
+    class A : Base()
+    class B : Base()
+}
+
+sealed interface IBase {
+    interface A : IBase
+    interface B : IBase
+}
+
+// ------------------ not null ------------------
+
+fun test_1(x: SomeEnum) {
+    <!NON_EXHAUSTIVE_WHEN!>when<!> (x) {
+        SomeEnum.A -> ""
+    }
+}
+
+fun test_2(x: Base) {
+    <!NON_EXHAUSTIVE_WHEN_ON_SEALED_CLASS!>when<!> (x) {
+        is Base.A -> ""
+    }
+}
+
+fun test_3(x: IBase) {
+    <!NON_EXHAUSTIVE_WHEN_ON_SEALED_CLASS!>when<!> (x) {
+        is IBase.A -> ""
+    }
+}
+
+fun test_4(x: Boolean) {
+    when (x) {
+        true -> ""
+    }
+}
+
+// ------------------ nullable ------------------
+
+fun test_5(x: SomeEnum?) {
+    when (x) {
+        SomeEnum.A -> ""
+        SomeEnum.B -> ""
+    }
+
+    <!NON_EXHAUSTIVE_WHEN!>when<!> (x) {
+        SomeEnum.A -> ""
+        null -> ""
+    }
+}
+
+fun test_6(x: Base?) {
+    when (x) {
+        is Base.A -> ""
+        is Base.B -> ""
+    }
+
+    <!NON_EXHAUSTIVE_WHEN_ON_SEALED_CLASS!>when<!> (x) {
+        is Base.A -> ""
+        null -> ""
+    }
+}
+
+fun test_7(x: IBase?) {
+    when (x) {
+        is IBase.A -> ""
+        is IBase.B -> ""
+    }
+    <!NON_EXHAUSTIVE_WHEN_ON_SEALED_CLASS!>when<!> (x) {
+        is IBase.A -> ""
+        null -> ""
+    }
+}
+
+fun test_8(x: Boolean?) {
+    when (x) {
+        true -> ""
+        false -> ""
+    }
+
+    when (x) {
+        true -> ""
+        null -> ""
+    }
+}
+
+// ------------------ with else ------------------
+
+fun test_9(x: SomeEnum?) {
+    when (x) {
+        SomeEnum.A -> ""
+        else -> ""
+    }
+}
+
+fun test_10(x: Base?) {
+    when (x) {
+        is Base.A -> ""
+        else -> ""
+    }
+}
+
+fun test_11(x: IBase?) {
+    when (x) {
+        is IBase.A -> ""
+        else -> ""
+    }
+}
+
+fun test_12(x: Boolean?) {
+    when (x) {
+        true -> ""
+        else -> ""
+    }
+}
+
+// ------------------ exhaustive ------------------
+
+fun test_13(x: SomeEnum?) {
+    when (x) {
+        SomeEnum.A -> ""
+        SomeEnum.B -> ""
+        null -> ""
+    }
+}
+
+fun test_14(x: Base?) {
+    when (x) {
+        is Base.A -> ""
+        is Base.B -> ""
+        null -> ""
+    }
+}
+
+fun test_15(x: IBase?) {
+    when (x) {
+        is IBase.A -> ""
+        is IBase.B -> ""
+        null -> ""
+    }
+}
+
+fun test_16(x: Boolean?) {
+    when (x) {
+        true -> ""
+        false -> ""
+        null -> ""
+    }
+}