Revert a set of changes increasing visibility.

Sources/Foundation/NSCharacterSet.swift

@@ -62,11 +62,11 @@ fileprivate extension String {
 
 open class NSCharacterSet : NSObject, NSCopying, NSMutableCopying, NSSecureCoding {
     typealias CFType = CFCharacterSet
-    internal var _base = _CFInfo(typeID: CFCharacterSetGetTypeID())
-    internal var _hashValue = UInt(0) // CFHashCode
-    internal var _buffer: UnsafeMutableRawPointer? = nil
-    internal var _length = Int(0) // CFIndex
-    internal var _annex: UnsafeMutableRawPointer? = nil
+    private var _base = _CFInfo(typeID: CFCharacterSetGetTypeID())
+    private var _hashValue = UInt(0) // CFHashCode
+    private var _buffer: UnsafeMutableRawPointer? = nil
+    private var _length = Int(0) // CFIndex
+    private var _annex: UnsafeMutableRawPointer? = nil
 
     internal var _cfObject: CFType {
         return unsafeBitCast(self, to: CFType.self)

Sources/Foundation/NSCoder.swift

@@ -745,7 +745,7 @@ open class NSCoder : NSObject {
         _hasFailed = true
     }
 
-    internal var _hasFailed = false
+    internal private(set) var _hasFailed = false
 
     open internal(set) var decodingFailurePolicy: NSCoder.DecodingFailurePolicy = .raiseException
 

Sources/Foundation/NSData.swift

@@ -56,7 +56,7 @@ extension NSData {
     }
 }
 
-internal final class _NSDataDeallocator {
+private final class _NSDataDeallocator {
     var handler: (UnsafeMutableRawPointer, Int) -> Void = {_,_ in }
 }
 
@@ -70,12 +70,12 @@ private let __kCFDontDeallocate: CFOptionFlags = 4
 open class NSData : NSObject, NSCopying, NSMutableCopying, NSSecureCoding {
     typealias CFType = CFData
 
-    internal var _base = _CFInfo(typeID: CFDataGetTypeID())
-    internal var _length: Int = 0 // CFIndex
-    internal var _capacity: Int = 0 // CFIndex
-    internal var _deallocator: UnsafeMutableRawPointer? = nil // for CF only
-    internal var _deallocHandler: _NSDataDeallocator? = _NSDataDeallocator() // for Swift
-    internal var _bytes: UnsafeMutablePointer<UInt8>? = nil
+    private var _base = _CFInfo(typeID: CFDataGetTypeID())
+    private var _length: Int = 0 // CFIndex
+    private var _capacity: Int = 0 // CFIndex
+    private var _deallocator: UnsafeMutableRawPointer? = nil // for CF only
+    private var _deallocHandler: _NSDataDeallocator? = _NSDataDeallocator() // for Swift
+    private var _bytes: UnsafeMutablePointer<UInt8>? = nil
 
     internal final var _cfObject: CFType {
         if type(of: self) === NSData.self || type(of: self) === NSMutableData.self {
@@ -112,7 +112,7 @@ open class NSData : NSObject, NSCopying, NSMutableCopying, NSSecureCoding {
         }
     }
 
-    internal init(bytes: UnsafeMutableRawPointer?, length: Int, copy: Bool = false, deallocator: ((UnsafeMutableRawPointer, Int) -> Void)? = nil) {
+    fileprivate init(bytes: UnsafeMutableRawPointer?, length: Int, copy: Bool = false, deallocator: ((UnsafeMutableRawPointer, Int) -> Void)? = nil) {
         super.init()
         _init(bytes: bytes, length: length, copy: copy, deallocator: deallocator)
     }
@@ -340,7 +340,7 @@ open class NSData : NSObject, NSCopying, NSMutableCopying, NSSecureCoding {
         return NSMutableData(bytes: UnsafeMutableRawPointer(mutating: bytes), length: length, copy: true, deallocator: nil)
     }
 
-    internal func byteDescription(limit: Int? = nil) -> String {
+    private func byteDescription(limit: Int? = nil) -> String {
         var s = ""
         var i = 0
         while i < self.length {

Sources/Foundation/NSNumber.swift

@@ -594,7 +594,7 @@ extension NSNumber : ExpressibleByFloatLiteral, ExpressibleByIntegerLiteral, Exp
 
 }
 
-internal struct CFSInt128Struct {
+private struct CFSInt128Struct {
     var high: Int64
     var low: UInt64
 }
@@ -606,8 +606,8 @@ fileprivate func cast<T, U>(_ t: T) -> U {
 open class NSNumber : NSValue {
     typealias CFType = CFNumber
     // This layout MUST be the same as CFNumber so that they are bridgeable
-    internal var _base = _CFInfo(typeID: CFNumberGetTypeID())
-    internal var _pad: UInt64 = 0
+    private var _base = _CFInfo(typeID: CFNumberGetTypeID())
+    private var _pad: UInt64 = 0
 
     internal final var _cfObject: CFType {
         return unsafeBitCast(self, to: CFType.self)
@@ -903,7 +903,7 @@ open class NSNumber : NSValue {
         return .init(truncatingIfNeeded: value.low)
     }
 
-    internal var int128Value: CFSInt128Struct {
+    private var int128Value: CFSInt128Struct {
         var value = CFSInt128Struct(high: 0, low: 0)
         CFNumberGetValue(_cfObject, kCFNumberSInt128Type, &value)
         return value

Sources/Foundation/NSObject.swift

@@ -367,7 +367,7 @@ open class NSObject : NSObjectProtocol, Equatable, Hashable {
     // Please note:
     // the following methods are not overridable in swift-corelibs-foundation.
 
-    internal class var nsObjectSuperclass: NSObject.Type? {
+    private class var nsObjectSuperclass: NSObject.Type? {
         // Pretend that {Swift,}Foundation.NSObject is the top of the class hierarchy.
         // On Darwin, avoids dipping into the class hierarchy that exists above this class,
         // which is ultimately rooted in the ObjC NSObject class.

Sources/Foundation/Progress.swift

@@ -30,14 +30,14 @@ import Dispatch
  */
 open class Progress : NSObject {
 
-    internal weak var _parent : Progress?
-    internal var _children : Set<Progress>
-    internal var _selfFraction : _ProgressFraction
-    internal var _childFraction : _ProgressFraction
-    internal var _userInfo : [ProgressUserInfoKey : Any]
+    private weak var _parent : Progress?
+    private var _children : Set<Progress>
+    private var _selfFraction : _ProgressFraction
+    private var _childFraction : _ProgressFraction
+    private var _userInfo : [ProgressUserInfoKey : Any]
 
     // This is set once, but after initialization
-    internal var _portionOfParent : Int64
+    private var _portionOfParent : Int64
 
     static private var _tsdKey = "_Foundation_CurrentProgressKey"
 
@@ -167,7 +167,7 @@ open class Progress : NSObject {
         }
     }
 
-    internal func _setParent(_ parent: Progress, portion: Int64) {
+    private func _setParent(_ parent: Progress, portion: Int64) {
         _parent = parent
         _portionOfParent = portion
 
@@ -416,18 +416,18 @@ open class Progress : NSObject {
     // MARK: -
     // MARK: Implementation of unit counts
 
-    internal var _overallFraction : _ProgressFraction {
+    private var _overallFraction : _ProgressFraction {
         return _selfFraction + _childFraction
     }
 
-    internal func _addCompletedUnitCount(_ unitCount : Int64) {
+    private func _addCompletedUnitCount(_ unitCount : Int64) {
         let old = _overallFraction
         _selfFraction.completed += unitCount
         let new = _overallFraction
         _updateFractionCompleted(from: old, to: new)
     }
 
-    internal func _updateFractionCompleted(from: _ProgressFraction, to: _ProgressFraction) {
+    private func _updateFractionCompleted(from: _ProgressFraction, to: _ProgressFraction) {
         if from != to {
             _parent?._updateChild(self, from: from, to: to, portion: _portionOfParent)
         }

Tests/Foundation/Tests/TestNSData.swift

@@ -20,15 +20,15 @@ import CoreFoundation
 class TestNSData: LoopbackServerTest {
 
     class AllOnesImmutableData : NSData {
-        private var __length : Int
+        private var _length : Int
         var _pointer : UnsafeMutableBufferPointer<UInt8>? {
             willSet {
                 if let p = _pointer { free(p.baseAddress) }
             }
         }
 
         init(length: Int) {
-            __length = length
+            _length = length
             super.init()
         }
 
@@ -45,7 +45,7 @@ class TestNSData: LoopbackServerTest {
 
         override var length : Int {
             get {
-                return __length
+                return _length
             }
         }
 
@@ -78,15 +78,15 @@ class TestNSData: LoopbackServerTest {
 
     class AllOnesData : NSMutableData {
 
-        private var __length : Int
+        private var _length : Int
         var _pointer : UnsafeMutableBufferPointer<UInt8>? {
             willSet {
                 if let p = _pointer { free(p.baseAddress) }
             }
         }
 
         override init(length: Int) {
-            __length = length
+            _length = length
             super.init()
         }
 
@@ -103,22 +103,22 @@ class TestNSData: LoopbackServerTest {
 
         override var length : Int {
             get {
-                return __length
+                return _length
             }
             set {
                 if let ptr = _pointer {
                     // Copy the data to our new length buffer
                     let newBuffer = malloc(newValue)!
-                    if newValue <= __length {
+                    if newValue <= _length {
                         memmove(newBuffer, ptr.baseAddress!, newValue)
-                    } else if newValue > __length {
-                        memmove(newBuffer, ptr.baseAddress!, __length)
-                        memset(newBuffer + __length, 1, newValue - __length)
+                    } else if newValue > _length {
+                        memmove(newBuffer, ptr.baseAddress!, _length)
+                        memset(newBuffer + _length, 1, newValue - _length)
                     }
                     let bytePtr = newBuffer.bindMemory(to: UInt8.self, capacity: newValue)
                     _pointer = UnsafeMutableBufferPointer(start: bytePtr, count: newValue)
                 }
-                __length = newValue
+                _length = newValue
             }
         }
 
@@ -138,7 +138,7 @@ class TestNSData: LoopbackServerTest {
         }
 
         override var mutableBytes: UnsafeMutableRawPointer {
-            let newBufferLength = __length
+            let newBufferLength = _length
             let newBuffer = malloc(newBufferLength)
             if let ptr = _pointer {
                 // Copy the existing data to the new box, then return its pointer
@@ -150,7 +150,7 @@ class TestNSData: LoopbackServerTest {
             let bytePtr = newBuffer!.bindMemory(to: UInt8.self, capacity: newBufferLength)
             let result = UnsafeMutableBufferPointer(start: bytePtr, count: newBufferLength)
             _pointer = result
-            __length = newBufferLength
+            _length = newBufferLength
             return UnsafeMutableRawPointer(result.baseAddress!)
         }