<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=""><blockquote type="cite" class="">On May 26, 2016, at 4:47 PM, Brent Royal-Gordon via swift-evolution <<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a>> wrote:<br class=""></blockquote><div><blockquote type="cite" class=""><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="">- Abusing rawValue is just that: an abuse.</span><br 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;" class=""></div></blockquote></div><br class=""><div class="">In addition, enums with associated types can’t have rawValues.</div><div class=""><br class=""></div><div class="">Why is this relevant, you may ask? Because error enums are a huge use case for something like this. Being able to do the below would be great:</div><div class=""><br class=""></div><div class="">enum MyError: ErrorProtocol {</div><div class=""> accessor var localizedFailureReason: String</div> accessor var url: NSURL<div class=""><br class=""></div><div class=""> case FileNotFound(url: NSURL) {</div><div class=""> self.localizedFailureReason = “File \"\(url.lastPathComponent ?? “”)\” not found.”</div><div class=""> self.url = url</div><div class=""> }</div><div class=""><br class=""></div><div class=""> case FileIsCorrupt(url: NSURL) {</div><div class=""> self.localizedFailureReason = “File \"\(url.lastPathComponent ?? “”)\” is corrupt.”</div><div class=""> self.url = url</div><div class=""> }</div><div class="">}</div><div class=""><br class=""></div><div class="">This would be much cleaner than the existing method of using a switch to create a userInfo dictionary for creating an NSError to send to -[NSApplication presentError:] and similar methods.</div><div class=""><br class=""></div><div class="">Charles</div><div class=""><br class=""></div></body></html>