<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">If protocols can (1) store data (2) implement methods (3) force "subclasses" to implement methods, then I'm ok that it isn't spelled "abstract". And yes, I know 2 and 3 done.<br><br><div id="AppleMailSignature"><span style="background-color: rgba(255, 255, 255, 0);">--<br>C. Keith Ray</span><div><span style="background-color: rgba(255, 255, 255, 0);"><br></span></div><div><span style="background-color: rgba(255, 255, 255, 0);">* <a href="https://leanpub.com/wepntk">https://leanpub.com/wepntk</a> <- buy my book?<br>* </span><a href="http://www.thirdfoundationsw.com/keith_ray_resume_2014_long.pdf">http://www.thirdfoundationsw.com/keith_ray_resume_2014_long.pdf</a><span style="background-color: rgba(255, 255, 255, 0);"><br>* <a href="http://agilesolutionspace.blogspot.com/">http://agilesolutionspace.blogspot.com/</a></span></div></div><div><br>On Nov 2, 2017, at 10:07 PM, Gwendal Roué via swift-evolution <<a href="mailto:swift-evolution@swift.org">swift-evolution@swift.org</a>> wrote:<br><br></div><blockquote type="cite"><div><span></span><br><blockquote type="cite"><span>Le 3 nov. 2017 à 04:29, Brent Royal-Gordon via swift-evolution <<a href="mailto:swift-evolution@swift.org">swift-evolution@swift.org</a>> a écrit :</span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>I think we should beef up protocols a little bit so that they can serve the role of abstract classes. </span><br></blockquote><span></span><br><span>That would be great.</span><br><span></span><br><span>Back in the day, the proposal SE-0026 "Abstract classes and methods" was deferred, with the following rationale: <a href="https://lists.swift.org/pipermail/swift-evolution-announce/2016-March/000056.html">https://lists.swift.org/pipermail/swift-evolution-announce/2016-March/000056.html</a></span><br><span></span><br><span>This rationale is great because it lists a few use cases for abstract class that protocols can't mimic today.</span><br><span></span><br><span>Gwendal</span><br><span></span><br><span>_______________________________________________</span><br><span>swift-evolution mailing list</span><br><span><a href="mailto:swift-evolution@swift.org">swift-evolution@swift.org</a></span><br><span><a href="https://lists.swift.org/mailman/listinfo/swift-evolution">https://lists.swift.org/mailman/listinfo/swift-evolution</a></span><br></div></blockquote></body></html>