• What is your evaluation of the proposal?
+0.5 because this is a half solution. I would also like to see a variant which accepts an inout argument for the reduction to accumulate into.
• Is the problem being addressed significant enough to warrant a change to Swift?
Yes.
• Does this proposal fit well with the feel and direction of Swift?
Yes.
• If you have used other languages or libraries with a similar feature, how do you feel that this proposal compares to those?
N/A
• How much effort did you put into your review? A glance, a quick reading, or an in-depth study?
Quick read and also followed earlier threads.