Check for exposed local classes (or objects) in type signatures

compiler/testData/diagnostics/tests/subtyping/localClasses.kt

@@ -6,12 +6,12 @@ fun <T> run(f: () -> T): T {
     return f()
 }
 
-fun foo(a: Int) = run {
+private fun foo(a: Int) = run {
     class A
     A()
 }
 
-fun foo() = run {
+private fun foo() = run {
     class A
     A()
 }

compiler/testData/diagnostics/tests/subtyping/localClasses.txt

@@ -1,8 +1,8 @@
 package
 
 package p {
-    public fun foo(): p.foo.<anonymous>.A
-    public fun foo(/*0*/ a: kotlin.Int): p.foo.<anonymous>.A
+    private fun foo(): p.foo.<anonymous>.A
+    private fun foo(/*0*/ a: kotlin.Int): p.foo.<anonymous>.A
     public fun </*0*/ T> run(/*0*/ f: () -> T): T
     public fun test(): kotlin.Unit
 }

compiler/testData/diagnostics/tests/subtyping/nestedIntoLocalClasses.kt

@@ -6,14 +6,14 @@ fun <T> run(f: () -> T): T {
     return f()
 }
 
-fun foo(a: Int) = run {
+private fun foo(a: Int) = run {
     object {
         inner class A
         fun foo() = A()
     }.foo()
 }
 
-fun foo() = run {
+private fun foo() = run {
     object {
         inner class A
         fun foo() = A()

compiler/testData/diagnostics/tests/subtyping/nestedIntoLocalClasses.txt

@@ -1,8 +1,8 @@
 package
 
 package p {
-    public fun foo(): p.foo.<anonymous>.<no name provided>.A
-    public fun foo(/*0*/ a: kotlin.Int): p.foo.<anonymous>.<no name provided>.A
+    private fun foo(): p.foo.<anonymous>.<no name provided>.A
+    private fun foo(/*0*/ a: kotlin.Int): p.foo.<anonymous>.<no name provided>.A
     public fun </*0*/ T> run(/*0*/ f: () -> T): T
     public fun test(): kotlin.Unit
 }

compiler/testData/diagnostics/tests/subtyping/nestedLocalClasses.kt

@@ -6,14 +6,14 @@ fun <T> run(f: () -> T): T {
     return f()
 }
 
-fun foo(a: Int) = run {
+private fun foo(a: Int) = run {
     class A {
         inner class B
     }
     A().B()
 }
 
-fun foo() = run {
+private fun foo() = run {
     class A {
         inner class B
     }

compiler/testData/diagnostics/tests/subtyping/nestedLocalClasses.txt

@@ -1,8 +1,8 @@
 package
 
 package p {
-    public fun foo(): p.foo.<anonymous>.A.B
-    public fun foo(/*0*/ a: kotlin.Int): p.foo.<anonymous>.A.B
+    private fun foo(): p.foo.<anonymous>.A.B
+    private fun foo(/*0*/ a: kotlin.Int): p.foo.<anonymous>.A.B
     public fun </*0*/ T> run(/*0*/ f: () -> T): T
     public fun test(): kotlin.Unit
 }