The rationale for using the same syntax is that a KeyPath is an unapplied
property/subscript access. Even the multi-segment part of it isn't necessarily
dissimilar: I don't think it would be unreasonable to imagine that
\Foo.someMethod.someOtherMethod could work*, that'd just be function
composition after all.
KeyPath : Properties/Subscripts :: Functions with a self argument : Methods
David
*not proposing this, haven't thought carefully about whether there are edge
cases I'm missing here, but I think the analogy holds
> On Apr 5, 2017, at 5:16 PM, Patrick Smith via swift-evolution
> <swift-evolution@swift.org> wrote:
>
> I too find the backslash odd, as it’s usually of course used to escape
> something.
>
> What about three periods?
>
> let firstFriendsNameKeyPath = Person...friends[0].name
> print(luke[keyPath: ...friends[0].name])
>
>
> I also find wanting to use the same syntax for unapplied methods strange, as
> they would product two totally different things: one a key path value, the
> other a function.
>
> Patrick
> On Thu, 6 Apr 2017 at 10:00 am, Douglas Gregor via swift-evolution
> <swift-evolution@swift.org <mailto:swift-evolution@swift.org>> wrote:
>> On Apr 5, 2017, at 4:55 PM, Colin Barrett <co...@springsandstruts.com
>> <mailto:co...@springsandstruts.com>> wrote:
>>
>> Is the choice of backslash up for review? I think another operator,
>
> We talked through basically everything on the keyboard, and there really
> aren’t other options that don’t stomp on existing behavior.
>
>> perhaps backtick (`), would work better.
>
> Backtick (`) is already taken for escaping identifiers, e.g.,
>
> var `func` = { /* some code */ }
>
> - Doug
>
>
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