mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
4acf9c8cf4
This makes it possible to initialize `std::vector` from a Swift Sequence. This also conforms C++ vectors to `ExpressibleByArrayLiteral`, making it possible, for instance, to pass a Swift array to a C++ function that takes a vector of strings as a parameter. rdar://104826995
48 lines
1.4 KiB
Swift
48 lines
1.4 KiB
Swift
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2014 - 2023 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
|
|
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// A C++ type that represents a vector of values.
|
|
///
|
|
/// C++ standard library type `std::vector` conforms to this protocol.
|
|
public protocol CxxVector<Element>: ExpressibleByArrayLiteral {
|
|
associatedtype Element
|
|
associatedtype RawIterator: UnsafeCxxRandomAccessIterator
|
|
where RawIterator.Pointee == Element
|
|
|
|
init()
|
|
|
|
mutating func push_back(_ element: Element)
|
|
}
|
|
|
|
extension CxxVector {
|
|
/// Creates a C++ vector containing the elements of a Swift Sequence.
|
|
///
|
|
/// This initializes the vector by copying every element of the sequence.
|
|
///
|
|
/// - Complexity: O(*n*), where *n* is the number of elements in the Swift
|
|
/// sequence
|
|
@inlinable
|
|
public init<S: Sequence>(_ sequence: __shared S) where S.Element == Element {
|
|
self.init()
|
|
for item in sequence {
|
|
self.push_back(item)
|
|
}
|
|
}
|
|
}
|
|
|
|
extension CxxVector {
|
|
@inlinable
|
|
public init(arrayLiteral elements: Element...) {
|
|
self.init(elements)
|
|
}
|
|
}
|