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cca27d02a0
Keep calm: remember that the standard library has many more public exports than the average target, and that this contains ALL of them at once. I also deliberately tried to tag nearly every top-level decl, even if that was just to explicitly mark things @internal, to make sure I didn't miss something. This does export more than we might want to, mostly for protocol conformance reasons, along with our simple-but-limiting typealias rule. I tried to also mark things private where possible, but it's really going to be up to the standard library owners to get this right. This is also only validated against top-level access control; I haven't fully tested against member-level access control yet, and none of our semantic restrictions are in place. Along the way I also noticed bits of stdlib cruft; to keep this patch understandable, I didn't change any of them. Swift SVN r19145
70 lines
1.9 KiB
Plaintext
70 lines
1.9 KiB
Plaintext
//===----------------------------------------------------------------------===//
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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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/// Wrapper for a contiguous array of T. UnsafeArray is both a
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/// Collection (which is multi-pass if you use indices or call
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/// generate() on it) and a Generator, which can only be assumed to be
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/// single-pass. It's not clear how well this combination will work
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/// out, or whether all Collections should also be Streams; consider
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/// this an experiment.
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@public struct UnsafeArrayGenerator<T>: Generator, Sequence {
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@public mutating func next() -> T? {
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return position == end ? nil : (position++).memory
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}
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@public func generate() -> UnsafeArrayGenerator {
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return self
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}
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var position, end: UnsafePointer<T>
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}
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%for Mutable in ('Mutable', ''):
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@public struct Unsafe${Mutable}Array<T> : ${Mutable}Collection {
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@public var startIndex: Int {
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return 0
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}
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@public var endIndex: Int {
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return _end - _position
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}
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@public subscript(i: Int) -> T {
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get {
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_debugPrecondition(i >= 0)
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_debugPrecondition(i < endIndex)
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return _position[i]
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}
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%if Mutable:
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set {
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_debugPrecondition(i >= 0)
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_debugPrecondition(i < endIndex)
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_position[i] = newValue
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}
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%end
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}
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@public init(start: UnsafePointer<T>, length: Int) {
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_position = start
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_end = start + length
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}
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@public func generate() -> UnsafeArrayGenerator<T> {
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return UnsafeArrayGenerator(position: _position, end: _end)
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}
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var _position, _end: UnsafePointer<T>
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}
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%end
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