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@andy_matuschak

Had fun making a type-safe value-oriented collection view data source in Swift today.

gist.github.com

Type-safe value-oriented collection view data source

Type-safe value-oriented collection view data source - CollectionViewDataSource.swift

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@andy_matuschak

Yeah. That's kinda nicer.

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@andy_matuschak

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@andy_matuschak

Although in practice, the CollectionType I'm passing to these things will probably be lazy, which would want ref semantics.

3:01 AM · Oct 15, 2014Twitter for Mac

@andy_matuschak

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@andy_matuschak

Probably worth noting that you can implement value-ish lazy things, but there are extra considerations…

intersections.tumblr.com

Unobservable effects with value types

Value types (struct, enum, and tuples) in Swift have some key advantages over reference types (primarily class) when it comes to expressiveness—which we’ll define for the purposes of this discussio...

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