[swift-evolution] [Proposal draft #2] Naming Functions with Argument Labels

Douglas Gregor dgregor at apple.com
Mon Jan 11 15:54:39 CST 2016

> On Jan 11, 2016, at 1:53 PM, Tino Heth <2th at gmx.de> wrote:
>> We discussed this a looooong while back and decided that we wanted the ‘_’ to emphasize that there is an argument there. The difference between “foo(:bar:)” and “foo(bar:)” is barely visible.
> That is true, but I think it is very uncommon to have such a set of methods — and afaics, it would violate the guidelines for method names.
> But speaking of additional characters that might be useful:
> What about the parameter types? When they are needed to identify the exact function, it would be nice if they could be included as well.
> foo(bar:(Int))
> (that's why I wanted to avoid the parenthesis in the first place…)

It’s grammatically ambiguous if you don’t have the “:)” at the end and, IMO, it’s not important enough to have special syntax for this: one can still coerce to a specific function type.

	- Doug

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