Extract Function: Ignore internal smartcasts

#KT-8458 Fixed

idea/testData/refactoring/extractFunction/parameters/candidateTypes/multipleTypes2.kt

@@ -0,0 +1,24 @@
+// SUGGESTED_NAMES: i, getX
+// PARAM_TYPES: kotlin.Any
+// PARAM_DESCRIPTOR: value-parameter val o: kotlin.Any defined in foo
+
+open class A {
+    val a = 1
+}
+
+interface T {
+    val t: Int
+}
+
+class B : A(), T {
+    override val t: Int = 2
+}
+
+fun foo(o: Any) {
+    val x = <selection>when (o) {
+        is A -> {
+            if (o is T) o.a + o.t else o.a
+        }
+        else -> o.hashCode()
+    }</selection>
+}

idea/testData/refactoring/extractFunction/parameters/candidateTypes/multipleTypes2.kt.after

@@ -0,0 +1,28 @@
+// SUGGESTED_NAMES: i, getX
+// PARAM_TYPES: kotlin.Any
+// PARAM_DESCRIPTOR: value-parameter val o: kotlin.Any defined in foo
+
+open class A {
+    val a = 1
+}
+
+interface T {
+    val t: Int
+}
+
+class B : A(), T {
+    override val t: Int = 2
+}
+
+fun foo(o: Any) {
+    val x = i(o)
+}
+
+private fun i(o: Any): Int {
+    return when (o) {
+        is A -> {
+            if (o is T) o.a + o.t else o.a
+        }
+        else -> o.hashCode()
+    }
+}

idea/testData/refactoring/extractFunction/parameters/candidateTypes/multipleTypes3.kt

@@ -0,0 +1,23 @@
+// PARAM_TYPES: A
+// PARAM_DESCRIPTOR: value-parameter val o: kotlin.Any defined in foo
+
+open class A {
+    val a = 1
+}
+
+interface T {
+    val t: Int
+}
+
+class B : A(), T {
+    override val t: Int = 2
+}
+
+fun foo(o: Any) {
+    val x = when (o) {
+        is A -> {
+            <selection>if (o is T) o.a + o.t else o.a</selection>
+        }
+        else -> o.hashCode()
+    }
+}

idea/testData/refactoring/extractFunction/parameters/candidateTypes/multipleTypes3.kt.after

@@ -0,0 +1,25 @@
+// PARAM_TYPES: A
+// PARAM_DESCRIPTOR: value-parameter val o: kotlin.Any defined in foo
+
+open class A {
+    val a = 1
+}
+
+interface T {
+    val t: Int
+}
+
+class B : A(), T {
+    override val t: Int = 2
+}
+
+fun foo(o: Any) {
+    val x = when (o) {
+        is A -> {
+            i(o)
+        }
+        else -> o.hashCode()
+    }
+}
+
+private fun i(o: A) = if (o is T) o.a + o.t else o.a

idea/testData/refactoring/extractFunction/parameters/candidateTypes/multipleTypes4.kt

@@ -0,0 +1,20 @@
+open class A {
+    val a = 1
+}
+
+interface T {
+    val t: Int
+}
+
+class B : A(), T {
+    override val t: Int = 2
+}
+
+fun foo(o: Any) {
+    val x = when (o) {
+        is A -> {
+            if (o is T) <selection>o.a + o.t</selection> else o.a
+        }
+        else -> o.hashCode()
+    }
+}

idea/testData/refactoring/extractFunction/parameters/candidateTypes/multipleTypes4.kt.conflicts

@@ -0,0 +1 @@
+Cannot extract method since following types are not denotable in the target scope:  {A & T}