[swift-evolution] Remove default case in switch-case

[Chris Lattner]

> On Dec 9, 2015, at 3:01 PM, Mustafa Yusuf via swift-evolution <swift-evolution at swift.org> wrote:
> 
> 
> Hello all. In switch statements in swift if all the possible cases aren't covered we have to supply a default case.
> 
>     let number = 10
> 
>     switch number {
>     case 10: print("yay")
>     case 12: print("close")
>     default: print("try again")
>     }
> 
> My proposal is replace it with the "case _:".
> 
>     let number = 10
> 
>     switch number {
>     case 10: print("yay")
>     case 12: print("close")
>     case _: print("try again")
>     }
> 
> Since underscore in swift means "whatever I don't care" it suits here better than "default". Correct me If I am wrong but this is the only use for "default" keyword in swift I guess. So we can completely remove "default" keyword from the language.
> 

FWIW, this is already supported.  We *also* support default for clarity of code / because it reads better, and for similarly with the (extended) C family of languages.

-Chris

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.swift.org/pipermail/swift-evolution/attachments/20151209/f034bb03/attachment-0001.html>