[swift-evolution] Binding generic types using a metatype parameter

[Joanna Carter]

I want to thank you for your "rubber duck" consultancy; I now have a working factory mechanism…

protocol PropertyFactory { }

extension PropertyFactory
{
  static func createProperty() -> PropertyProtocol
  {
    typealias ValueType = Self
    
    return Property<ValueType>()
  }
}

extension Int : PropertyFactory { }

The key was to typealias Self so that it could then be passed as a type parameter to the generic type.

The problem remains that it is still necessary to implement PropertyFactory on each and every type that is likely to be used for a property.

I would therefore ask if anything that would make life simpler in this regard is a worthwhile candidate for inclusion in the future of Swift?

Joanna

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Joanna Carter
Carter Consulting