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26f6a751c4
Extensions on ImplicitlyUnwrappedOptional are not actually accessible because we force the optional (and thus can only access things on the type it is wrapping). Remove these from the stdlib in order to pave the way toward fully implementing SE-0054.
52 lines
1.9 KiB
Swift
52 lines
1.9 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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/// An optional type that allows implicit member access.
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///
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/// The `ImplicitlyUnwrappedOptional` type is deprecated. To create an optional
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/// value that is implicitly unwrapped, place an exclamation mark (`!`) after
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/// the type that you want to denote as optional.
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///
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/// // An implicitly unwrapped optional integer
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/// let guaranteedNumber: Int! = 6
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///
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/// // An optional integer
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/// let possibleNumber: Int? = 5
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@_fixed_layout
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public enum ImplicitlyUnwrappedOptional<Wrapped> : ExpressibleByNilLiteral {
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// The compiler has special knowledge of the existence of
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// `ImplicitlyUnwrappedOptional<Wrapped>`, but always interacts with it using
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// the library intrinsics below.
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/// The absence of a value. Typically written using the nil literal, `nil`.
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case none
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/// The presence of a value, stored as `Wrapped`.
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case some(Wrapped)
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/// Creates an instance that stores the given value.
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@_inlineable // FIXME(sil-serialize-all)
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public init(_ some: Wrapped) { self = .some(some) }
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/// Creates an instance initialized with `nil`.
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///
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/// Do not call this initializer directly. It is used by the compiler when
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/// you initialize an `Optional` instance with a `nil` literal. For example:
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///
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/// let i: Index! = nil
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@_inlineable // FIXME(sil-serialize-all)
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@_transparent
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public init(nilLiteral: ()) {
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self = .none
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}
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}
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