[FE 1.0] Prohibit confusing syntax inside when branches

^KT-48385 Fixed
2021-10-20 16:40:13 +03:00
parent 653fc85461
commit 1513e739c6
28 changed files with 1323 additions and 28 deletions
@@ -0,0 +1,61 @@
+// LANGUAGE: +ProhibitConfusingSyntaxInWhenBranches
+// DIAGNOSTICS: -INCOMPATIBLE_TYPES, -NON_EXHAUSTIVE_WHEN_STATEMENT, -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE
+// ISSUE: KT-48385
+
+operator fun Boolean.plus(other: Boolean): Boolean = true
+operator fun Boolean.minus(other: Boolean): Boolean = true
+operator fun Boolean.times(other: Boolean): Boolean = true
+operator fun Boolean.div(other: Boolean): Boolean = true
+operator fun Boolean.rem(other: Boolean): Boolean = true
+
+operator fun Boolean.rangeTo(other: Boolean): Boolean = true
+
+fun Boolean.id(): Boolean = true
+
+operator fun Boolean.inc(): Boolean = true
+operator fun Boolean.dec(): Boolean = true
+
+operator fun Boolean.plusAssign(other: Boolean) {}
+operator fun Boolean.minusAssign(other: Boolean) {}
+operator fun Boolean.timesAssign(other: Boolean) {}
+operator fun Boolean.divAssign(other: Boolean) {}
+operator fun Boolean.remAssign(other: Boolean) {}
+
+operator fun Any?.contains(other: Any): Boolean = false
+
+fun testWithSubject_ok(x: Boolean, y: Boolean?, any: Any, z: Boolean) {
+    when {
+        x.id() -> {}
+        <!CONDITION_TYPE_MISMATCH!>y?.id()<!> -> {}
+        <!CONDITION_TYPE_MISMATCH!>any as? Boolean<!> -> {}
+        any as Boolean -> {}
+        x * x -> {}
+        x / x -> {}
+        x % x -> {}
+        x + x -> {}
+        x - x -> {}
+        x..x -> {}
+        <!CONDITION_TYPE_MISMATCH!>y<!> -> {}
+        y ?: x -> {}
+        x in x -> {}
+        x !in x -> {}
+        x is String -> {}
+        x !is String -> {}
+        x <!OVERLOAD_RESOLUTION_AMBIGUITY!><<!> x -> {}
+        x <!OVERLOAD_RESOLUTION_AMBIGUITY!>><!> x -> {}
+        x <!OVERLOAD_RESOLUTION_AMBIGUITY!><=<!> x -> {}
+        x <!OVERLOAD_RESOLUTION_AMBIGUITY!>>=<!> x -> {}
+        x == x -> {}
+        x != x -> {}
+        x === x -> {}
+        x !== x -> {}
+        x && x -> {}
+        x || x -> {}
+    }
+
+    var b = z
+    when (z) {
+        b++ -> {}
+        b-- -> {}
+    }
+}