https://github.com/kkebo/swift-box

Rust's Box for Swift
https://github.com/kkebo/swift-box

swift

Last synced: 2 months ago
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Rust's Box for Swift

• Host: GitHub
• URL: https://github.com/kkebo/swift-box
• Owner: kkebo
• License: mit
• Archived: true
• Created: 2021-08-04T14:36:28.000Z (about 4 years ago)
• Default Branch: main
• Last Pushed: 2025-03-29T22:52:37.000Z (7 months ago)
• Last Synced: 2025-08-04T12:53:16.988Z (3 months ago)
• Topics: swift
• Language: Swift
• Homepage:
• Size: 59.6 KB
• Stars: 3
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Box

![coverage](coverage.svg)

[![Swift](https://img.shields.io/badge/Swift-6.0-orange.svg)](https://www.swift.org)

[![License](https://img.shields.io/github/license/kkebo/swift-box.svg)](LICENSE)

> [!WARNING]  

> This repository is now deprecated. Instead, please use [`Box`](https://github.com/apple/swift-collections/blob/future/Sources/Future/Box.swift) of [swift-collections](https://github.com/apple/swift-collections).

This Swift package provides a type, `Box`.

[`Box`](./Sources/Box.swift) is a value type that wraps another value type for heap allocation like [Rust's `Box`](https://doc.rust-lang.org/std/boxed/struct.Box.html). Also, it is implemented with copy-on-write behavior.

## Examples

```swift

import Box

struct Foo: ~Copyable {

    @Box var a: Int

    var b: Box

}

var foo = Foo(a: 3, b: .init(4))

assert(foo.a == 3)

assert(foo.b.value == 4)

foo.a = 10

foo.b.value = 5

assert(foo.a == 10)

assert(foo.b.value == 5)

```