[Pitch] Destructuring Assignment of Structs and Classes

Evolution Pitches
16

This was discussed in a previous thread, and our consensus was that the closure capture list syntax would work best for this. For example

final class C {}

struct Car {
    let make: String
    let model: String
    let year: Int
    let reference: C
}

let car = Car(make: "Honda", model: "E", year: 2021, reference: C())

let [make, model, year] = car

This would allow for binding to different names and also weak and unowned modifiers. This would also be less invasive to the parser I hope, since you'd be able to use parts of the grammar dedicated to capture lists:

var [weak weakReference = reference] = car

Alternatively, it could look closer to the dictionary syntax:

var [weak weakReference: reference] = car
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