<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=""><br class=""><div><blockquote type="cite" class=""><div class="">On 1 May 2016, at 09:12, Антон Жилин <<a href="mailto:antonyzhilin@gmail.com" class="">antonyzhilin@gmail.com</a>> wrote:</div><div class=""><div dir="ltr" class=""><div class=""><br class=""></div><div class="">Pattern binding for optionals will look like:</div><div class=""><br class=""></div><div class="">if let x? = y { … }</div></div></div></blockquote><br class=""></div><div>Would take a little getting used to, but I think I’d be fine with it, as the way things are now is inconsistent with regular assignments (which remain optional).</div><div><br class=""></div><div>My only concern is why the question mark on the left hand side? I don’t really have any concrete reason against it, but it just feels kind of odd to me, I’m just hoping for some reasoning why some of the alternatives aren’t better fits like:</div><div><br class=""></div><div><font face="Monaco" class=""><span class="Apple-tab-span" style="white-space:pre"> </span>if let x = y? { … } // More like optional chaining, which is familiar as an “if non-nil proceed” behaviour</font></div><div><font face="Monaco" class=""><span class="Apple-tab-span" style="white-space:pre"> </span>if let x ?= y { … } // More obviously a special type of assignment that could fail if y is nil</font></div><div><br class=""></div><div>Again, I’m in favour, I’m just curious why the mentioned format, were others considered previously, or is just because that’s how the case-keyword form does it? (I don’t use it as I’ve never liked that form, and it doesn’t seem that well known anyway).</div></body></html>