[swift-evolution] [Idea] return if / return unless

[Julian Dunskus]

How often have you written something like the following?

`
if indexPath.row == 0 { return }

guard let thing = things[index] else { return nil }
`

I propose adding some syntactic sugar to make such statements more readable and simple to write:

`
return if indexPath.row == 0

return nil unless let thing = things[index]
`

I don’t know how easy or hard this would be to implement, but I think it would improve some code significantly.

–Julian Dunskus
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