[swift-evolution] Guard Implicit Fallback

[Developer]

I agree the nil fallback case is a common one, but the loss of readability and decreased understanding of control flow here makes me think special-casing this isn't all it's cracked up to be.

~Robert Widmann

2016/02/10 22:40、Tighe Racicot via swift-evolution <swift-evolution at swift.org> のメッセージ:

> Hey everyone, 
> 
> I feel that `guard` could be a little more Swifty and would like to start a conversation concerning it.
> 
> For example, I often have a function whose job depends on an optional having a value, and so I guard-let at the start and return if the guard fails. Or if the function returns an optional type, I'll simply return nil if guard fails. 
> 
> Can we improve on the general fallback case? Could we simply say:
> 
> func noReturn() {
>     guard let aValue = someOptional
>     ....
> }
> 
> and have that imply "else { return void or nil }"
> 
> What are your thoughts?
> 
> Tighe
> 
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