KT-12152 : constructor consistency: distinguish properties with and w/o backing fields, with default / custom accessors

compiler/testData/diagnostics/tests/constructorConsistency/backing.kt

@@ -0,0 +1,24 @@
+class My {
+    var x = 1
+        set(value) {
+            field = value
+        }
+
+    var y: Int = 1
+        set(value) {
+            field = value + if (w == "") 0 else 1
+        }
+
+    var z: Int = 2
+        set(value) {
+            field = value + if (w == "") 1 else 0
+        }
+
+    init {
+        // Writing properties using setters is dangerous
+        <!DEBUG_INFO_LEAKING_THIS!>y<!> = 4
+        this.<!DEBUG_INFO_LEAKING_THIS!>z<!> = 5
+    }
+
+    val w = "6"
+}

compiler/testData/diagnostics/tests/constructorConsistency/backing.txt

@@ -0,0 +1,12 @@
+package
+
+public final class My {
+    public constructor My()
+    public final val w: kotlin.String = "6"
+    public final var x: kotlin.Int
+    public final var y: kotlin.Int
+    public final var z: kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/testData/diagnostics/tests/constructorConsistency/getset.kt

@@ -0,0 +1,17 @@
+class My(var x: String) {
+
+    var y: String
+        get() = if (x != "") x else z
+        set(arg) {
+            if (arg != "") x = arg
+        }
+
+    val z: String
+
+    init {
+        // Dangerous: setter!
+        <!DEBUG_INFO_LEAKING_THIS!>y<!> = "x"
+        // Dangerous: getter!
+        if (<!DEBUG_INFO_LEAKING_THIS!>y<!> != "") z = this.<!DEBUG_INFO_LEAKING_THIS!>y<!> else z = <!DEBUG_INFO_LEAKING_THIS!>y<!>
+    }
+}

compiler/testData/diagnostics/tests/constructorConsistency/getset.txt

@@ -0,0 +1,11 @@
+package
+
+public final class My {
+    public constructor My(/*0*/ x: kotlin.String)
+    public final var x: kotlin.String
+    public final var y: kotlin.String
+    public final val z: kotlin.String
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/testData/diagnostics/tests/constructorConsistency/initwithgetter.kt

@@ -0,0 +1,19 @@
+class My {
+    val x: Int
+        get() = field + if (z != "") 1 else 0
+
+    val y: Int
+        get() = field - if (z == "") 0 else 1
+
+    val w: Int
+
+    init {
+        // Safe, val never has a setter
+        x = 0
+        this.y = 0
+        // Unsafe
+        w = this.<!DEBUG_INFO_LEAKING_THIS!>x<!> + <!DEBUG_INFO_LEAKING_THIS!>y<!>
+    }
+
+    val z = "1"
+}

compiler/testData/diagnostics/tests/constructorConsistency/initwithgetter.txt

@@ -0,0 +1,12 @@
+package
+
+public final class My {
+    public constructor My()
+    public final val w: kotlin.Int
+    public final val x: kotlin.Int
+    public final val y: kotlin.Int
+    public final val z: kotlin.String = "1"
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}