Member functions of enum should not be in smart completion

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/smart/StaticMembers.kt

@@ -105,9 +105,12 @@ class StaticMembers(
                     .forEach(::processMember)
         }
 
-        var members = classDescriptor.defaultType.memberScope.getContributedDescriptors()
-        if (classDescriptor.kind != ClassKind.ENUM_CLASS && classDescriptor.kind != ClassKind.OBJECT) {
-            members = members.filter { DescriptorUtils.isNonCompanionObject(it) }
+        val members = classDescriptor.defaultType.memberScope.getContributedDescriptors().filter { member ->
+            when (classDescriptor.kind) {
+                ClassKind.ENUM_CLASS -> member is ClassDescriptor // enum member
+                ClassKind.OBJECT -> true
+                else -> DescriptorUtils.isNonCompanionObject(member)
+            }
         }
         members.forEach(::processMember)
     }

idea/idea-completion/testData/smart/EnumMembers.kt

@@ -1,8 +1,9 @@
 package sample
 
 enum class Foo {
-    X,
-    Y
+    X, Y;
+
+    fun foo(): Foo = this
 }
 
 fun foo(){
@@ -11,3 +12,4 @@ fun foo(){
 
 // EXIST: { lookupString:"X", itemText:"Foo.X", tailText:" (sample)", typeText:"Foo" }
 // EXIST: { lookupString:"Y", itemText:"Foo.Y", tailText:" (sample)", typeText:"Foo" }
+// ABSENT: { itemText:"Foo.foo" }