[swift-evolution] [Idea] Allowing most keywords after "."
Douglas Gregor
dgregor at apple.com
Fri Feb 26 14:43:48 CST 2016
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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