[swift-evolution] [Accepted with Revision] SE-0099 Restructuring Condition Clauses

Haravikk swift-evolution at haravikk.me
Thu Jun 9 02:53:18 CDT 2016

> On 9 Jun 2016, at 02:47, Joe Groff via swift-evolution <swift-evolution at swift.org> wrote:
> comma should remain the condition separator, and the 'where' keyword can be retired from its purpose as a boolean condition introducer.

Can we get some clarification as to why ‘where’ is being chosen to be retired here? I’m deeply disappointed by that decision as enabling the consistent use of comma as a separator does not preclude the use of where for simple cases that don’t require it. I’m all for having a more usable separator for complex conditionals, but I rarely need it, meanwhile in common, simple conditional bindings and patterns I find the ‘where’ keyword a lot more readable, i.e:

	if let value = foo where foo > 5 { … }
	if let value = foo, foo > 5 { … }

The latter just doesn’t read as cleanly to me, and these are the kinds of simple conditionals that I use a lot of. As such as I’d still prefer to have ‘where’ be usable in the simple case, and I feel it was a mistake for the SE-0099 to have it tied to changes to the separator as the two changes aren’t mutually exclusive.
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