[swift-evolution] [Draft] Throwing Properties and Subscripts
Brent Royal-Gordon
brent at architechies.com
Wed Mar 16 08:37:35 CDT 2016
> I wonder if it would help to document the grammar changes necessary in the proposal.
I'm preparing a revision with that information.
> I also wonder how it could affect the getter shorthand? Couldn't the following work for subscripts?
>
> subscript(idx: Int) throws -> Element { ... }
>
> // the above is shorthand for
> subscript(idx: Int) -> Element {
> get throws { ... }
> }
A shorthand is a definite possibility, especially for subscripts where both accessors might need to throw because of an invalid index, but I decided to keep it simple. I'm also worried that it might encourage people to mark accessors as throwing when only one actually needs it.
> Not sure how this could be extended to work with general computed vars. This doesn't feel right:
>
> var x throws: Int { ... }
Yeah, that's another problem.
--
Brent Royal-Gordon
Architechies
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