<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">> With respect to adopting other core Swift ideas like value types: we turned 20 classes into value types last year. This included a ton of work to adopt standard library protocols and improve type safety. It is an absolutely huge surface amount of Foundation’s total API surface area. It’s a large statement about how much we value making Foundation’s API consistent for Swift.</div><div class=""><br class=""></div><div class="">Yeah! I really love the effort you’re putting into making Foundation more “Swifty”. That doesn’t go unnoticed. </div><div class=""><br class=""></div><br class=""><div><blockquote type="cite" class=""><div class="">On Nov 4, 2016, at 8:49 PM, Tony Parker <<a href="mailto:anthony.parker@apple.com" class="">anthony.parker@apple.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">However, I do not believe there is such a fundamental conceptual mismatch here that we cannot preserve one of the most useful aspects of developing with the iOS, macOS SDKs - consistent types and low impedance mismatch between API at all levels of the stack.</span></div></blockquote></div><br class=""><div class="">I definitely value "consistent types and low impedance mismatch between API at all levels of the stack”. I just hope the APIs are designed with the best of Swift in mind. Then after we get a good design, we can see if it fits Foundation, and then make the adaptations there. I think this approach would make Foundation follow along and become even more “Swiftier” with time. Of course this is easier said than done, but I believe that’s what would make the ecosystem as a whole become better for Swift.</div></body></html>