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41d9c2cc59
The SDK directory is now confusing as the Windows target also has a SDK overlay. In order to make this more uniform, move the SDK directory to Darwin which covers the fact that this covers the XNU family of OSes. The Windows directory contains the SDK overlay for the Windows target.
52 lines
1.4 KiB
Swift
52 lines
1.4 KiB
Swift
//===----------------------------------------------------------------------===//
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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 - 2017 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 https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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@_exported import Foundation // Clang module
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// TODO: Evaluate deprecating with a message in favor of IndexSet.
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public struct NSIndexSetIterator : IteratorProtocol {
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public typealias Element = Int
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internal let _set: NSIndexSet
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internal var _first: Bool = true
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internal var _current: Int?
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internal init(set: NSIndexSet) {
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self._set = set
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self._current = nil
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}
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public mutating func next() -> Int? {
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if _first {
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_current = _set.firstIndex
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_first = false
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} else if let c = _current {
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_current = _set.indexGreaterThanIndex(c)
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} else {
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// current is already nil
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}
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if _current == NSNotFound {
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_current = nil
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}
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return _current
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}
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}
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extension NSIndexSet : Sequence {
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/// Return an *iterator* over the elements of this *sequence*.
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///
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/// - Complexity: O(1).
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public func makeIterator() -> NSIndexSetIterator {
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return NSIndexSetIterator(set: self)
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}
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}
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