KT-11203: report errors on read-write operations for elements of collections with inconsistent get&set signatures

compiler/testData/diagnostics/tests/operatorsOverloading/InconsistentGetSet.kt

@@ -0,0 +1,45 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+object Legal {
+    operator fun get(i: Int) = 0
+    operator fun set(i: Int, newValue: Int) {}
+    operator fun set(i: Int, newValue: String) {}
+}
+
+fun testLegal() {
+    ++Legal[0]
+    Legal[0]++
+    Legal[0] += 1
+}
+
+object MismatchingTypes {
+    operator fun get(i: Int) = 0
+    operator fun set(i: Int, newValue: String) {}
+}
+
+fun testMismatchingTypes() {
+    ++MismatchingTypes<!NO_SET_METHOD!>[0]<!>
+    MismatchingTypes<!NO_SET_METHOD!>[0]<!>++
+    MismatchingTypes<!NO_SET_METHOD!>[0]<!> += 1
+}
+
+object MismatchingArities1 {
+    operator fun get(i: Int) = 0
+    operator fun set(i: Int, j: Int, newValue: Int) {}
+}
+
+object MismatchingArities2 {
+    operator fun get(i: Int, j: Int) = 0
+    operator fun set(i: Int, newValue: Int) {}
+}
+
+fun testMismatchingArities() {
+    ++MismatchingArities1<!NO_SET_METHOD!>[0]<!>
+    MismatchingArities1<!NO_SET_METHOD!>[0]<!>++
+    MismatchingArities1<!NO_SET_METHOD!>[0]<!> += 1
+
+    ++<!NO_VALUE_FOR_PARAMETER!>MismatchingArities2[0]<!>
+    <!NO_VALUE_FOR_PARAMETER!>MismatchingArities2[0]<!>++
+    <!NO_VALUE_FOR_PARAMETER!>MismatchingArities2[0]<!> += 1
+}
+

compiler/testData/diagnostics/tests/operatorsOverloading/InconsistentGetSet.txt

@@ -0,0 +1,42 @@
+package
+
+public fun testLegal(): kotlin.Unit
+public fun testMismatchingArities(): kotlin.Unit
+public fun testMismatchingTypes(): kotlin.Unit
+
+public object Legal {
+    private constructor Legal()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final operator fun get(/*0*/ i: kotlin.Int): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public final operator fun set(/*0*/ i: kotlin.Int, /*1*/ newValue: kotlin.Int): kotlin.Unit
+    public final operator fun set(/*0*/ i: kotlin.Int, /*1*/ newValue: kotlin.String): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public object MismatchingArities1 {
+    private constructor MismatchingArities1()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final operator fun get(/*0*/ i: kotlin.Int): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public final operator fun set(/*0*/ i: kotlin.Int, /*1*/ j: kotlin.Int, /*2*/ newValue: kotlin.Int): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public object MismatchingArities2 {
+    private constructor MismatchingArities2()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final operator fun get(/*0*/ i: kotlin.Int, /*1*/ j: kotlin.Int): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public final operator fun set(/*0*/ i: kotlin.Int, /*1*/ newValue: kotlin.Int): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public object MismatchingTypes {
+    private constructor MismatchingTypes()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final operator fun get(/*0*/ i: kotlin.Int): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public final operator fun set(/*0*/ i: kotlin.Int, /*1*/ newValue: kotlin.String): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}