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393c520fbe
They didn't belong lumped together in the implementation of Dictionary, where they were. Swift SVN r22909
118 lines
3.9 KiB
Swift
118 lines
3.9 KiB
Swift
//===--- ShadowProtocols.swift - Protocols for decoupled ObjC bridging ----===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// To implement bridging, the core standard library needs to interact
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// a little bit with Cocoa. Because we want to keep the core
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// decoupled from the Foundation module, we can't use foundation
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// classes such as NSArray directly. We _can_, however, use an @objc
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// protocols whose API is "layout-compatible" with that of NSArray,
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// and use unsafe casts to treat NSArray instances as instances of
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// that protocol.
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//
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//===----------------------------------------------------------------------===//
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import SwiftShims
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@objc
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public protocol _ShadowProtocol {}
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/// A shadow for the `NSFastEnumeration` protocol
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@objc
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public protocol _SwiftNSFastEnumerationType : _ShadowProtocol {
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func countByEnumeratingWithState(
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state: UnsafeMutablePointer<_SwiftNSFastEnumerationState>,
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objects: UnsafeMutablePointer<AnyObject>, count: Int
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) -> Int
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}
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/// A shadow for the `NSEnumerator` class
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@objc
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public protocol _SwiftNSEnumeratorType : _ShadowProtocol {
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init()
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func nextObject() -> AnyObject?
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}
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/// A token that can be used for `NSZone*`
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public typealias _SwiftNSZone = COpaquePointer
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/// A shadow for the `NSCopying` protocol
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@objc
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public protocol _SwiftNSCopyingType : _ShadowProtocol {
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func copyWithZone(zone: _SwiftNSZone) -> AnyObject
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}
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/// A shadow for the "core operations" of NSArray.
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///
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/// Covers a set of operations everyone needs to implement in order to
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/// be a useful `NSArray` subclass.
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@unsafe_no_objc_tagged_pointer @objc
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public protocol _NSArrayCoreType :
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_SwiftNSCopyingType, _SwiftNSFastEnumerationType {
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func objectAtIndex(index: Int) -> AnyObject
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func getObjects(UnsafeMutablePointer<AnyObject>, range: _SwiftNSRange)
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func countByEnumeratingWithState(
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state: UnsafeMutablePointer<_SwiftNSFastEnumerationState>,
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objects: UnsafeMutablePointer<AnyObject>, count: Int
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) -> Int
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func copyWithZone(zone: _SwiftNSZone) -> AnyObject
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var count: Int { get }
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}
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/// A shadow for the "core operations" of NSDictionary.
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///
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/// Covers a set of operations everyone needs to implement in order to
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/// be a useful `NSDictionary` subclass.
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@objc
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public protocol _NSDictionaryCoreType :
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_SwiftNSCopyingType, _SwiftNSFastEnumerationType {
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// The following methods should be overridden when implementing an
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// NSDictionary subclass.
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// The designated initializer of `NSDictionary`.
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init(
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objects: UnsafePointer<AnyObject?>,
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forKeys: UnsafePointer<Void>, count: Int)
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var count: Int { get }
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func objectForKey(aKey: AnyObject?) -> AnyObject?
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func keyEnumerator() -> _SwiftNSEnumeratorType?
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// We also override the following methods for efficiency.
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func copyWithZone(zone: _SwiftNSZone) -> AnyObject
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func countByEnumeratingWithState(
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state: UnsafeMutablePointer<_SwiftNSFastEnumerationState>,
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objects: UnsafeMutablePointer<AnyObject>, count: Int
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) -> Int
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}
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/// A shadow for the API of NSDictionary we will use in the core
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/// stdlib
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///
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/// `NSDictionary` operations, in addition to those on
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/// `_NSDictionaryCoreType`, that we need to use from the core stdlib.
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/// Distinct from `_NSDictionaryCoreType` because we don't want to be
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/// forced to implement operations that `NSDictionary` already
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/// supplies.
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@unsafe_no_objc_tagged_pointer @objc
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public protocol _NSDictionaryType : _NSDictionaryCoreType {
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func getObjects(objects: UnsafeMutablePointer<AnyObject>,
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andKeys keys: UnsafeMutablePointer<AnyObject>)
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}
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