[stdlib] Explicit visibility and return types: builtins

generators/builtins/iterators.kt

@@ -27,7 +27,7 @@ class GenerateIterators(out: PrintWriter) : BuiltInsSourceGenerator(out) {
             val s = kind.capitalized
             out.println("/** An iterator over a sequence of values of type `$s`. */")
             out.println("public abstract class ${s}Iterator : Iterator<$s> {"   )
-            out.println("    override final fun next() = next$s()")
+            out.println("    final override fun next(): $s = next$s()")
             out.println()
             out.println("    /** Returns the next value in the sequence without boxing. */")
             out.println("    public abstract fun next$s(): $s")

generators/builtins/progressions.kt

@@ -106,7 +106,7 @@ public open class $progression
 
     override fun toString(): String = ${"if (step > 0) \"\$first..\$last step \$step\" else \"\$first downTo \$last step \${-step}\""}
 
-    companion object {
+    public companion object {
         /**
          * Creates $progression within the specified bounds of a closed range.
          *

generators/builtins/ranges.kt

@@ -72,7 +72,7 @@ public class $range(start: $t, endInclusive: $t) : ${t}Progression(start, endInc
 
     override fun toString(): String = $toString
 
-    companion object {
+    public companion object {
         /** An empty range of values of type $t. */
         public val EMPTY: $range = $range($emptyBounds)
     }

generators/builtins/unsignedTypes.kt

@@ -70,7 +70,7 @@ class UnsignedTypeGenerator(val type: UnsignedType, out: PrintWriter) : BuiltIns
         out.println("@JvmInline")
         out.println("public value class $className @kotlin.internal.IntrinsicConstEvaluation @PublishedApi internal constructor(@PublishedApi internal val data: $storageType) : Comparable<$className> {")
         out.println()
-        out.println("""    companion object {
+        out.println("""    public companion object {
         /**
          * A constant holding the minimum value an instance of $className can have.
          */
@@ -599,7 +599,7 @@ public class ${elementType}Range(start: $elementType, endInclusive: $elementType
 
     override fun toString(): String = "${'$'}first..${'$'}last"
 
-    companion object {
+    public companion object {
         /** An empty range of values of type $elementType. */
         public val EMPTY: ${elementType}Range = ${elementType}Range($elementType.MAX_VALUE, $elementType.MIN_VALUE)
     }
@@ -655,7 +655,7 @@ internal constructor(
 
     override fun toString(): String = if (step > 0) "${'$'}first..${'$'}last step ${'$'}step" else "${'$'}first downTo ${'$'}last step ${'$'}{-step}"
 
-    companion object {
+    public companion object {
         /**
          * Creates ${elementType}Progression within the specified bounds of a closed range.