<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div><span></span></div><div><div>Type inference is one of my favorite features of Seift. I don't think anything would make me change my mind. I read the proposal and couldn't quite figure out why such a request. </div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">I still have to read the links that explain why though. <br><br></div><div>Regards</div><div><br></div><div><br>On Apr 9, 2017, at 10:05 PM, Daniel Duan via swift-evolution <<a href="mailto:swift-evolution@swift.org">swift-evolution@swift.org</a>> wrote:<br><br></div><blockquote type="cite"><div><meta http-equiv="Content-Type" content="text/html charset=utf-8">I’m still not sure whether *I* want this. But here’s a proposal anyways: <a href="https://gist.github.com/dduan/5017a0b0f0880d014f4ce14c4ca7fb55" class="">https://gist.github.com/dduan/5017a0b0f0880d014f4ce14c4ca7fb55</a><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Apr 7, 2017, at 12:21 AM, Daniel Duan via swift-evolution <<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">Hi all,<br class=""><br class="">In a discussion about inferring parameter types from default value, Slava brought up some performance problems caused by type inference for stored properties in side types:<br class=""><br class=""><a href="https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20170313/033882.html" class="">https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20170313/033882.html</a><br class=""><br class="">Towards the end, the post mentioned that some Swift team members contemplated requiring types for stored properties in type declarations. I think this idea deserves some more attention. Hence this last minute idea-floating.<br class=""><br class="">In addition to solving a performance headache in implementation, there're always the general benefit of making type declartion more explicit and readable (clarity for reader should out-weigh pleasure of the author). Making the<br class="">language slightly more consistent (we are not inferring types for default parameter values in function anyways).<br class=""><br class="">The cons for doing this are obvious too: the inference makes the language feels more friendly and is, undoubtedly, a beloved feature for many. This would be a source breaking change.<br class=""><br class="">Just thought I'd float the idea to gather some quick reaction. What do y'all think?<br class=""><br class="">Daniel Duan<br class="">_______________________________________________<br class="">swift-evolution mailing list<br class=""><a href="mailto:swift-evolution@swift.org">swift-evolution@swift.org</a><br class=""><a href="https://lists.swift.org/mailman/listinfo/swift-evolution">https://lists.swift.org/mailman/listinfo/swift-evolution</a><br class=""></div></div></blockquote></div><br class=""></div></div></blockquote><blockquote type="cite"><div><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></div></body></html>