Why can’t we have these kinds of globals?

Why can’t I declare a type-level property for a generic nominal (value?) type? Why can’t we define a static variable inside a (generic?) function?


Swift has never supported static variables in functions. I believe this was a deliberate design choice, but I have not seen any discussion about it.

Regardless, for non-generic functions, you can easily achieve the same effect with a static variable on a type declared within the function:

func foo() {
  struct Foo { static var x = 0 }
  Foo.x += 1
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Probably because they have an extremely limited number of uses. And I'd say most of those uses are better served by alternative designs.

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