[swift-evolution] Checking in; more thoughts on arrays and variadic generics

Daryle Walker darylew at mac.com
Sun Feb 5 15:27:14 CST 2017

> On Jan 27, 2017, at 4:25 PM, Slava Pestov <spestov at apple.com> wrote:
>> On Jan 27, 2017, at 11:44 AM, Karl Wagner via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
>> as would CollectionOfOne<T>, to be replaced by a single-element tuple (T).
> For what it’s worth, Swift doesn’t have single-element tuples. (T) is just sugar for the type T itself.

You could use “(repeat T for 1)” if you really wanted. (I wonder if I should allow “(…, repeat T for 0)” to define trailing array segments.)

My concept always had the array directive within a “()”. One, the isolation (hopefully) prevents “repeat” and/or “for” from being parsed for their statement meanings. Two, I think “repeat repeat T for N for M” looks awful compared to “(…, repeat (repeat T for N) for M,… )”.

Daryle Walker
Mac, Internet, and Video Game Junkie
darylew AT mac DOT com 

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