mirror of
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684e9ebf0c
* Added tests for generic functions * Add some tests for mutable spans * Initialize ConstSpan from UnsafeMutableBufferPointer * Change hardening flag
58 lines
2.1 KiB
Swift
58 lines
2.1 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 - 2023 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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/// A C++ type that is an object that can refer to a contiguous sequence of objects.
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///
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/// C++ standard library type `std::span` conforms to this protocol.
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public protocol CxxSpan<Element> {
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associatedtype Element
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associatedtype Size: BinaryInteger
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init()
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init(_ unsafePointer : UnsafePointer<Element>, _ count: Size)
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}
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extension CxxSpan {
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/// Creates a C++ span from a Swift UnsafeBufferPointer
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@inlinable
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public init(_ unsafeBufferPointer: UnsafeBufferPointer<Element>) {
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precondition(unsafeBufferPointer.baseAddress != nil,
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"UnsafeBufferPointer should not point to nil")
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self.init(unsafeBufferPointer.baseAddress!, Size(unsafeBufferPointer.count))
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}
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@inlinable
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public init(_ unsafeMutableBufferPointer: UnsafeMutableBufferPointer<Element>) {
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precondition(unsafeMutableBufferPointer.baseAddress != nil,
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"UnsafeMutableBufferPointer should not point to nil")
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self.init(unsafeMutableBufferPointer.baseAddress!, Size(unsafeMutableBufferPointer.count))
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}
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}
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public protocol CxxMutableSpan<Element> {
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associatedtype Element
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associatedtype Size: BinaryInteger
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init()
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init(_ unsafeMutablePointer : UnsafeMutablePointer<Element>, _ count: Size)
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}
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extension CxxMutableSpan {
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/// Creates a C++ span from a Swift UnsafeMutableBufferPointer
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@inlinable
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public init(_ unsafeMutableBufferPointer: UnsafeMutableBufferPointer<Element>) {
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precondition(unsafeMutableBufferPointer.baseAddress != nil,
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"UnsafeMutableBufferPointer should not point to nil")
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self.init(unsafeMutableBufferPointer.baseAddress!, Size(unsafeMutableBufferPointer.count))
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}
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}
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