[swift-evolution] [Review] Replace `typealias` keyword with `associatedtype` for associated type declarations

Douglas Gregor dgregor at apple.com
Tue Jan 12 12:23:41 CST 2016


> On Jan 12, 2016, at 2:19 AM, Howard Lovatt <howard.lovatt at gmail.com> wrote:
> 
> I have proposed the elimination of associated types by replacing them with generic arguments and an implementation of generics that allows covariance, see:
> 
> 	[swift-evolution] Make generics covariant and add generics to	protocols  <https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20160111/006367.html>  <>
> 
> Food for though for another way forward?

FWIW, I disagree fairly strongly with both of those directions for Swift generics; I’ll reply over on that thread.

	- Doug

> 
> PS I agree using typealias for two different concepts is confusing.
> 
> 
>> On 3 Jan 2016, at 5:38 PM, Douglas Gregor via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
>> 
>> Hello Swift community,
>> 
>> The review of "Replace `typealias` keyword with `associatedtype` for associated type declarations” begins now and runs through Wednesday, January 6th. The proposal is available here:
>> 
>> 	https://github.com/apple/swift-evolution/blob/master/proposals/0011-replace-typealias-associated.md <https://github.com/apple/swift-evolution/blob/master/proposals/0011-replace-typealias-associated.md>
>> 
>> Reviews are an important part of the Swift evolution process. All reviews should be sent to the swift-evolution mailing list at
>> 
>> 	https://lists.swift.org/mailman/listinfo/swift-evolution <https://lists.swift.org/mailman/listinfo/swift-evolution>
>> 
>> or, if you would like to keep your feedback private, directly to the review manager.
>> 
>> What goes into a review?
>> 
>> The goal of the review process is to improve the proposal under review through constructive criticism and, eventually, determine the direction of Swift. When writing your review, here are some questions you might want to answer in your review:
>> 
>> 	* What is your evaluation of the proposal?
>> 	* Is the problem being addressed significant enough to warrant a change to Swift?
>> 	* Does this proposal fit well with the feel and direction of Swift?
>> 	* If you have you used other languages or libraries with a similar feature, how do you feel that this proposal compares to those?
>> 	* How much effort did you put into your review? A glance, a quick reading, or an in-depth study?
>> 
>> More information about the Swift evolution process is available at
>> 
>> 	https://github.com/apple/swift-evolution/blob/master/process.md <https://github.com/apple/swift-evolution/blob/master/process.md>
>> 
>> 	Cheers,
>> 	Doug Gregor
>> 	Review Manager
>> 
>> 
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