mirror of
https://github.com/apple/swift.git
synced 2025-12-21 12:14:44 +01:00
8dda2274bc
# Motivation For AsyncStream we created a custom internal Deque implementation to use for the buffering. This implementation was relatively bare-bones compared to the one in swift-collections. Furthermore, it lacked some methods that we need to implement the new `AsyncStream` APIs that support producer backpressure. # Modification This PR copies over the Deque implementation of swift-collections and makes it internal and non-inlinable. # Result We now have a fully functional Deque.
53 lines
1.7 KiB
Swift
53 lines
1.7 KiB
Swift
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2021 Apple Inc. and the Swift project authors
|
|
// Licensed under Apache License v2.0 with Runtime Library Exception
|
|
//
|
|
// See https://swift.org/LICENSE.txt for license information
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// This file is copied from swift-collections and should not be modified here.
|
|
/// Rather all changes should be made to swift-collections and copied back.
|
|
|
|
import Swift
|
|
|
|
extension _Deque: Encodable where Element: Encodable {
|
|
/// Encodes the elements of this deque into the given encoder in an unkeyed
|
|
/// container.
|
|
///
|
|
/// This function throws an error if any values are invalid for the given
|
|
/// encoder's format.
|
|
///
|
|
/// - Parameter encoder: The encoder to write data to.
|
|
func encode(to encoder: Encoder) throws {
|
|
var container = encoder.unkeyedContainer()
|
|
for element in self {
|
|
try container.encode(element)
|
|
}
|
|
}
|
|
}
|
|
|
|
extension _Deque: Decodable where Element: Decodable {
|
|
/// Creates a new deque by decoding from the given decoder.
|
|
///
|
|
/// This initializer throws an error if reading from the decoder fails, or
|
|
/// if the data read is corrupted or otherwise invalid.
|
|
///
|
|
/// - Parameter decoder: The decoder to read data from.
|
|
init(from decoder: Decoder) throws {
|
|
self.init()
|
|
|
|
var container = try decoder.unkeyedContainer()
|
|
if let count = container.count {
|
|
self.reserveCapacity(count)
|
|
}
|
|
while !container.isAtEnd {
|
|
let element = try container.decode(Element.self)
|
|
self.append(element)
|
|
}
|
|
}
|
|
}
|