[FE 1.0] Report NON_EXHAUSTIVE_WHEN_STATEMENT/NO_ELSE_IN_WHEN for when's on logical types

^KT-47709 In Progress
2021-07-13 12:29:54 +03:00
parent 85c7f386eb
commit ef635f6a96
35 changed files with 930 additions and 44 deletions
@@ -0,0 +1,154 @@
+// !LANGUAGE: +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) {
+    <!NO_ELSE_IN_WHEN!>when<!> (x) {
+        SomeEnum.A -> ""
+    }
+}
+
+fun test_2(x: Base) {
+    <!NO_ELSE_IN_WHEN!>when<!> (x) {
+        is Base.A -> ""
+    }
+}
+
+fun test_3(x: IBase) {
+    <!NO_ELSE_IN_WHEN!>when<!> (x) {
+        is IBase.A -> ""
+    }
+}
+
+fun test_4(x: Boolean) {
+    <!NO_ELSE_IN_WHEN!>when<!> (x) {
+        true -> ""
+    }
+}
+
+// ------------------ nullable ------------------
+
+fun test_5(x: SomeEnum?) {
+    <!NO_ELSE_IN_WHEN!>when<!> (x) {
+        SomeEnum.A -> ""
+        SomeEnum.B -> ""
+    }
+
+    <!NO_ELSE_IN_WHEN!>when<!> (x) {
+        SomeEnum.A -> ""
+        null -> ""
+    }
+}
+
+fun test_6(x: Base?) {
+    <!NO_ELSE_IN_WHEN!>when<!> (x) {
+        is Base.A -> ""
+        is Base.B -> ""
+    }
+
+    <!NO_ELSE_IN_WHEN!>when<!> (x) {
+        is Base.A -> ""
+        null -> ""
+    }
+}
+
+fun test_7(x: IBase?) {
+    <!NO_ELSE_IN_WHEN!>when<!> (x) {
+        is IBase.A -> ""
+        is IBase.B -> ""
+    }
+    <!NO_ELSE_IN_WHEN!>when<!> (x) {
+        is IBase.A -> ""
+        null -> ""
+    }
+}
+
+fun test_8(x: Boolean?) {
+    <!NO_ELSE_IN_WHEN!>when<!> (x) {
+        true -> ""
+        false -> ""
+    }
+
+    <!NO_ELSE_IN_WHEN!>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 -> ""
+    }
+}