Respect receiver-dependent visibility when selecting smart-cast type

compiler/testData/diagnostics/tests/scopes/protectedVisibility/innerProtectedClass.kt

@@ -0,0 +1,13 @@
+open class BaseClass() {
+    protected class Nested(val x: Int, protected val y: Int)
+
+    protected fun foo() = Nested(1, 2)
+}
+
+class Foo : BaseClass() {
+    fun bar() {
+        val f = foo()
+        f.x
+        f.<!INVISIBLE_MEMBER!>y<!>
+    }
+}

compiler/testData/diagnostics/tests/scopes/protectedVisibility/innerProtectedClass.txt

@@ -0,0 +1,27 @@
+package
+
+public open class BaseClass {
+    public constructor BaseClass()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    protected final fun foo(): BaseClass.Nested
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    protected final class Nested {
+        public constructor Nested(/*0*/ x: kotlin.Int, /*1*/ y: kotlin.Int)
+        public final val x: kotlin.Int
+        protected final val y: 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
+    }
+}
+
+public final class Foo : BaseClass {
+    public constructor Foo()
+    public final fun bar(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    protected final override /*1*/ /*fake_override*/ fun foo(): BaseClass.Nested
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/testData/diagnostics/tests/scopes/protectedVisibility/smartcastOnExtensionReceiver.kt

@@ -0,0 +1,9 @@
+abstract class A<T : Any> {
+    abstract protected fun T.foo()
+
+    fun bar(x: T?) {
+        if (x != null) {
+            <!DEBUG_INFO_SMARTCAST!>x<!>.foo()
+        }
+    }
+}

compiler/testData/diagnostics/tests/scopes/protectedVisibility/smartcastOnExtensionReceiver.txt

@@ -0,0 +1,10 @@
+package
+
+public abstract class A</*0*/ T : kotlin.Any> {
+    public constructor A</*0*/ T : kotlin.Any>()
+    public final fun bar(/*0*/ x: T?): kotlin.Unit
+    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
+    protected abstract fun T.foo(): kotlin.Unit
+}

compiler/testData/diagnostics/tests/scopes/protectedVisibility/unstableSmartCast.kt

@@ -0,0 +1,18 @@
+// !CHECK_TYPE
+open class BaseOuter {
+    protected fun foo() = 1
+    protected fun bar() { }
+}
+
+class Foo(var base: BaseOuter)
+
+fun BaseOuter.foo(): String = ""
+
+class Derived : BaseOuter() {
+    fun test(foo: Foo) {
+        if (foo.base is Derived) {
+            foo.base.foo() checkType { _<String>() } // Resolved to extension
+            <!SMARTCAST_IMPOSSIBLE!>foo.base<!>.bar()
+        }
+    }
+}

compiler/testData/diagnostics/tests/scopes/protectedVisibility/unstableSmartCast.txt

@@ -0,0 +1,30 @@
+package
+
+public fun BaseOuter.foo(): kotlin.String
+
+public open class BaseOuter {
+    public constructor BaseOuter()
+    protected final fun bar(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    protected final fun foo(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class Derived : BaseOuter {
+    public constructor Derived()
+    protected final override /*1*/ /*fake_override*/ fun bar(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    protected final override /*1*/ /*fake_override*/ fun foo(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public final fun test(/*0*/ foo: Foo): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class Foo {
+    public constructor Foo(/*0*/ base: BaseOuter)
+    public final var base: BaseOuter
+    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/scopes/protectedVisibility/withSmartcast.kt

@@ -0,0 +1,30 @@
+open class Base {
+    open protected fun foo() {}
+    open protected fun bar() {}
+
+    open protected var x: Int = 1
+    open var y: Int = 1
+        protected set
+}
+
+class Derived : Base() {
+    override fun bar() { }
+
+    protected fun baz(x: Base) {
+        x.<!INVISIBLE_MEMBER!>foo<!>()
+        x.<!INVISIBLE_MEMBER!>bar<!>()
+
+        x.<!INVISIBLE_MEMBER!>x<!> = x.<!INVISIBLE_MEMBER!>x<!> + 1
+        <!INVISIBLE_SETTER!>x.y<!> = x.y + 1
+
+        if (x is Derived) {
+            <!DEBUG_INFO_SMARTCAST!>x<!>.foo()
+            <!DEBUG_INFO_SMARTCAST!>x<!>.bar()
+            <!DEBUG_INFO_SMARTCAST!>x<!>.baz(x)
+
+            <!DEBUG_INFO_SMARTCAST!>x<!>.x = <!DEBUG_INFO_SMARTCAST!>x<!>.x + 1
+            // TODO: Should be smart cast
+            <!INVISIBLE_SETTER!>x.y<!> = x.y + 1
+        }
+    }
+}

compiler/testData/diagnostics/tests/scopes/protectedVisibility/withSmartcast.txt

@@ -0,0 +1,24 @@
+package
+
+public open class Base {
+    public constructor Base()
+    protected open var x: kotlin.Int
+    public open var y: kotlin.Int
+    protected open fun bar(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    protected open fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class Derived : Base {
+    public constructor Derived()
+    protected open override /*1*/ /*fake_override*/ var x: kotlin.Int
+    public open override /*1*/ /*fake_override*/ var y: kotlin.Int
+    protected open override /*1*/ fun bar(): kotlin.Unit
+    protected final fun baz(/*0*/ x: Base): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    protected open override /*1*/ /*fake_override*/ fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}