<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 Feb 24, 2016, at 12:36 AM, Radosław Pietruszewski <<a href="mailto:radexpl@gmail.com" class="">radexpl@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="Content-Type" content="text/html charset=utf-8" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">Seems like an easy win, so I’m leaning towards a +1.</div><div class=""><br class=""></div><div class="">OTOH, are there any other cases where Swift -> ObjC automatically changes names of things to optimize for ObjC? If we don’t do more of that (the '<font face="Helvetica Neue" class="">"Add needless words" to Objective-C method names’ thread, or other quick wins like this one), it would be weird to make just this one exception, a single special case. I fear this would be more surprising than not changing anything at all.</font></div></div></div></blockquote><div><br class=""></div>We do a bunch of this already. We join the first argument label to the base name to form the first selector piece, inserting “with” if there’s no preposition in between already, and for throwing methods we either add “error:” in the appropriate place or append “AndReturnError” to the first selector piece if there are no other parameters.</div><div><br class=""></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>- Doug</div><div><br class=""></div><div><br class=""><blockquote type="cite" class=""><div class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">
<div class="">— Radek</div>
</div>
<br class=""><div class=""><blockquote type="cite" class=""><div class="">On 23 Feb 2016, at 22:00, Douglas Gregor 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=""><meta http-equiv="Content-Type" content="text/html charset=utf-8" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi all,<div class=""><br class=""></div><div class="">The Swift API guidelines state that Boolean properties should reflect assertions about the receiver, so in Swift one would expect:</div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>class Foo {</div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span> var isEnabled: Bool // good</div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>}</div><div class=""><br class=""></div><div class="">rather than</div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>class Foo {</div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span> var enabled: Bool // not Swifty</div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>}</div><div class=""><br class=""></div><div class="">When the property is @objc, e.g.,</div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>class Foo : NSObject {</div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span> @objc var isEnabled: Bool</div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>}</div><div class=""><br class=""></div><div class="">The resulting Objective-C property doesn’t follow the <a href="https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/CodingGuidelines/Articles/NamingIvarsAndTypes.html#//apple_ref/doc/uid/20001284-BAJGIIJE" class="">Cocoa guidelines for Objective-C</a>:</div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>@property (readwrite,nonatomic) BOOL isEnabled;</div><div class=""><br class=""></div><div class="">because those guidelines state that properties do not use the “is” prefix.</div><div class=""><br class=""></div><div class="">My proposal is to strip the “is” prefix from the Objective-C name, but leave it off the getter, e.g.,</div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>@property (readwrite,nonatomic,getter=isEnabled) BOOL enabled;</div><div class=""><br class=""></div><div class="">The change would have no effect on the Swift name; it will only affect the Objective-C property name and setter name.</div><div class=""><br class=""></div><div class="">Thoughts?</div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>- Doug</div><div class=""><br class=""></div></div>_______________________________________________<br class="">swift-evolution mailing list<br class=""><a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a><br class=""><a href="https://lists.swift.org/mailman/listinfo/swift-evolution" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</a><br class=""></div></blockquote></div><br class=""></div></div></blockquote></div><br class=""></body></html>