Box

This Swift package provides a type, Box.

Box is a value type that wraps another value type for heap allocation like Rust's Box. Also, it is implemented with copy-on-write behavior.

Examples

import Box

struct Foo: ~Copyable {
    @Box var a: Int
    var b: Box<Int>
}

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)