KT-5287 J2K: Convert class with private constructor and static functions to "object" instead of class with "class object"

#KT-5287 Fixed

j2k/testData/fileOrElement/constructors/allCallsPrimary.kt

@@ -2,12 +2,10 @@ package pack
 
 class C(arg1: Int, arg2: Int = 0, arg3: Int = 0)
 
-public class User {
-    companion object {
-        public fun main() {
-            val c1 = C(100, 100, 100)
-            val c2 = C(100, 100)
-            val c3 = C(100)
-        }
+public object User {
+    public fun main() {
+        val c1 = C(100, 100, 100)
+        val c2 = C(100, 100)
+        val c3 = C(100)
     }
 }

j2k/testData/fileOrElement/constructors/allCallsPrimary2.kt

@@ -18,12 +18,10 @@ class C(val myArg1: Int) {
     }
 }
 
-public class User {
-    companion object {
-        public fun main() {
-            val c1 = C(100, 100, 100)
-            val c2 = C(100, 100)
-            val c3 = C(100)
-        }
+public object User {
+    public fun main() {
+        val c1 = C(100, 100, 100)
+        val c2 = C(100, 100)
+        val c3 = C(100)
     }
 }

j2k/testData/fileOrElement/constructors/chain.kt

@@ -9,12 +9,10 @@ class C(arg1: Int, arg2: Int, arg3: Int) {
     }
 }
 
-public class User {
-    companion object {
-        public fun main() {
-            val c1 = C(1, 2, 3)
-            val c2 = C(5, 6)
-            val c3 = C(7)
-        }
+public object User {
+    public fun main() {
+        val c1 = C(1, 2, 3)
+        val c2 = C(5, 6)
+        val c3 = C(7)
     }
 }

j2k/testData/fileOrElement/constructors/customerBuilder.kt

@@ -33,12 +33,10 @@ class CustomerBuilder {
     }
 }
 
-public class User {
-    companion object {
-        public fun main() {
-            val customer = CustomerBuilder().WithFirstName("Homer").WithLastName("Simpson").Build()
-            System.out.println(customer.firstName)
-            System.out.println(customer.lastName)
-        }
+public object User {
+    public fun main() {
+        val customer = CustomerBuilder().WithFirstName("Homer").WithLastName("Simpson").Build()
+        System.out.println(customer.firstName)
+        System.out.println(customer.lastName)
     }
 }

j2k/testData/fileOrElement/constructors/genericIdentifier.kt

@@ -20,12 +20,10 @@ public class Identifier<T> {
     }
 }
 
-public class User {
-    companion object {
-        public fun main() {
-            val i1 = Identifier("name", false, true)
-            val i2 = Identifier("name", false)
-            val i3 = Identifier("name")
-        }
+public object User {
+    public fun main() {
+        val i1 = Identifier("name", false, true)
+        val i2 = Identifier("name", false)
+        val i3 = Identifier("name")
     }
 }

j2k/testData/fileOrElement/constructors/identifier.kt

@@ -20,12 +20,10 @@ public class Identifier {
     }
 }
 
-public class User {
-    companion object {
-        public fun main() {
-            val i1 = Identifier("name", false, true)
-            val i2 = Identifier("name", false)
-            val i3 = Identifier("name")
-        }
+public object User {
+    public fun main() {
+        val i1 = Identifier("name", false, true)
+        val i2 = Identifier("name", false)
+        val i3 = Identifier("name")
     }
 }

j2k/testData/fileOrElement/constructors/noPrimary.kt

@@ -11,12 +11,10 @@ class C {
     }
 }
 
-public class User {
-    companion object {
-        public fun main() {
-            val c1 = C(1, 2, 3)
-            val c2 = C(5, 6)
-            val c3 = C(7)
-        }
+public object User {
+    public fun main() {
+        val c1 = C(1, 2, 3)
+        val c2 = C(5, 6)
+        val c3 = C(7)
     }
 }

j2k/testData/fileOrElement/constructors/parameterModification.kt

@@ -17,12 +17,10 @@ class C(arg1: Int, arg2: Int = 0, arg3: Int = 0) {
     }
 }
 
-public class User {
-    companion object {
-        public fun main() {
-            val c1 = C(100, 100, 100)
-            val c2 = C(100, 100)
-            val c3 = C(100)
-        }
+public object User {
+    public fun main() {
+        val c1 = C(100, 100, 100)
+        val c2 = C(100, 100)
+        val c3 = C(100)
     }
 }

j2k/testData/fileOrElement/constructors/secondaryConstructorsInNestedClass.kt

@@ -1,4 +1,4 @@
-class Outer {
+object Outer {
     private class Nested1() {
 
         public constructor(a: Int) : this() {
@@ -48,13 +48,10 @@ class Outer {
         }
     }
 
-    companion object {
-
-        fun foo() {
-            val nested1 = Nested1(1)
-            val nested2 = Nested2(2)
-            val nested3 = Nested3(3)
-            val nested4 = Nested4(4)
-        }
+    fun foo() {
+        val nested1 = Nested1(1)
+        val nested2 = Nested2(2)
+        val nested3 = Nested3(3)
+        val nested4 = Nested4(4)
     }
 }

j2k/testData/fileOrElement/constructors/withManyDefaultParams.kt

@@ -24,10 +24,8 @@ public class Test {
     }
 }
 
-public class User {
-    companion object {
-        public fun main() {
-            val t = Test("name")
-        }
+public object User {
+    public fun main() {
+        val t = Test("name")
     }
 }