Smart completion: fixed logic in elvis operator

idea/testData/completion/smart/InElvisOperator3.kt

@@ -0,0 +1,20 @@
+trait A
+trait B : A
+trait C
+
+fun foo(a: A){}
+fun foo(c: C){}
+
+fun A.bar(a: A, b: B, c: C, a1: A?, b1: B?, c1: C?) {
+    foo(this ?: <caret>
+}
+
+// EXIST: { itemText:"a" }
+// EXIST: { itemText:"b" }
+// ABSENT: { itemText:"c" }
+// ABSENT: { itemText:"a1" }
+// ABSENT: { itemText:"b1" }
+// ABSENT: { itemText:"c1" }
+// EXIST: { itemText:"!! a1" }
+// EXIST: { itemText:"!! b1" }
+// ABSENT: { itemText:"!! c1" }

idea/testData/completion/smart/InElvisOperator4.kt

@@ -0,0 +1,20 @@
+trait A
+trait B : A
+trait C
+
+fun foo(a: A?){}
+fun foo(c: C?){}
+
+fun A.bar(a: A, b: B, c: C, a1: A?, b1: B?, c1: C?) {
+    foo(this ?: <caret>
+}
+
+// EXIST: { itemText:"a" }
+// EXIST: { itemText:"b" }
+// ABSENT: { itemText:"c" }
+// EXIST: { itemText:"a1" }
+// EXIST: { itemText:"b1" }
+// ABSENT: { itemText:"c1" }
+// ABSENT: { itemText:"!! a1" }
+// ABSENT: { itemText:"!! b1" }
+// ABSENT: { itemText:"!! c1" }

idea/testData/completion/smart/InElvisOperator5.kt

@@ -0,0 +1,20 @@
+trait A
+trait B : A
+trait C
+
+fun foo(a: A){}
+fun foo(c: C){}
+
+fun B.bar(a: A, b: B, c: C, a1: A?, b1: B?, c1: C?) {
+    foo(this ?: <caret>
+}
+
+// EXIST: { itemText:"a" }
+// EXIST: { itemText:"b" }
+// ABSENT: { itemText:"c" }
+// ABSENT: { itemText:"a1" }
+// ABSENT: { itemText:"b1" }
+// ABSENT: { itemText:"c1" }
+// EXIST: { itemText:"!! a1" }
+// EXIST: { itemText:"!! b1" }
+// ABSENT: { itemText:"!! c1" }

idea/testData/completion/smart/InElvisOperator6.kt

@@ -0,0 +1,20 @@
+trait A
+trait B : A
+trait C
+
+fun foo(a: A){}
+fun foo(c: C){}
+
+fun B?.bar(a: A, b: B, c: C, a1: A?, b1: B?, c1: C?) {
+    foo(this ?: <caret>
+}
+
+// EXIST: { itemText:"a" }
+// EXIST: { itemText:"b" }
+// ABSENT: { itemText:"c" }
+// ABSENT: { itemText:"a1" }
+// ABSENT: { itemText:"b1" }
+// ABSENT: { itemText:"c1" }
+// EXIST: { itemText:"!! a1" }
+// EXIST: { itemText:"!! b1" }
+// ABSENT: { itemText:"!! c1" }