[swift-evolution] [Idea] Allowing most keywords after "."

[David Waite]

Keywords following dots not requiring backticks also seems a valid option.

More of a meta-comment:
 1. Default was actually a poor name choice for an enumeration case given the meaning of ‘default’ in the language. Some might say this name choice is now being escalated
 2. Default has always been a restrictive term to have as a keyword, although it is only really required to be considered a keyword in one place

I personally would be fine with switching ‘default’ for ‘else’, as another evolutionator suggested. I don’t remember if this was proposed previously, or if that was only the idea of ‘case _:’, which I’m not really in favor of.

-DW

> On Feb 26, 2016, at 1:43 PM, Douglas Gregor via swift-evolution <swift-evolution at swift.org> wrote:
> 
> Hi all,
> 
> As part of the grand API guidelines discussion, there was a lot of support for using lowerCamelCase for enum cases, because they are values in Swift. One unfortunate wrinkle here is that it’s not at all uncommon to have a case named “Default” for an enumeration. One example pulled randomly from GitHub:
> 
> enum DispatchQOS {
>   case UserInteractive
>   case UserInitiated
>   case Default
>   case Utility
>   case Background
> }
> 
> If we’re lowerCamelCasting enum cases, this becomes:
> 
> enum DispatchQOS {
>   case userInteractive
>   case userInitiated
>   case `default`
>   case utility
>   case background
> }
> 
> Note the back-ticks, which are also needed at the call site:
> 
> 	func dispatch(priority priority: 
> 
> 	dispatch(priority: .`default`) { … }
> 
> We could allow one to refer to keywords without back-ticks following a “.”, similarly to the way we allow keywords without back-ticks preceding a ‘:’ for argument labels, e.g.:
> 
> 	func dispatch(priority priority: 
> 
> 	dispatch(priority: .`default`) { … }
> 
> One would still need to use back-ticks in the declaration of the case, but at least uses would be back-tick-free. Thoughts?
> 
> 	- Doug
> 
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> swift-evolution mailing list
> swift-evolution at swift.org
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