<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="">I like that it "matches" #available and establishes the # prefix as a (to paraphrase) <span style="font-family: Palatino-Roman;" class="">special, compiler-supported expression type that doesn't steal a keyword.</span></div><div class="">-- E</div><br class=""><div><blockquote type="cite" class=""><div class="">On Jan 20, 2016, at 4:48 PM, 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=""><div style="font-family: Palatino-Roman; font-size: 14px; font-style: normal; font-variant: 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=""><blockquote type="cite" class=""><div class=""><br class="Apple-interchange-newline">On Jan 19, 2016, at 4:52 PM, 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=""><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><br class=""><div class=""><blockquote type="cite" class=""><div class="">On Jan 19, 2016, at 4:40 PM, Jacob Bandes-Storch <<a href="mailto:jtbandes@gmail.com" class="">jtbandes@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">Is there a well-defined meaning for `#` ?<span class="Apple-converted-space"> </span></div></div></blockquote><div class=""><br class=""></div><div class="">Not yet.</div><div class=""><br class=""></div><blockquote type="cite" class=""><div class=""><div dir="ltr" class="">What about #selector(x)?</div></div></blockquote><div class=""><br class=""></div><div class="">Objective-C selector formation is a *very* narrow feature to consider stealing one of our few underused sigils.</div></div></div></div></blockquote><div class=""><br class=""></div><div class="">Actually, this isn’t that much different from “#available”, in the sense that it’s a special, compiler-supported expression type for which we don’t want to necessarily steal a keyword. What do others think about “#selector”?</div><div class=""><br class=""></div><span class="Apple-tab-span" style="white-space: pre;"> </span>- Doug</div><div style="font-family: Palatino-Roman; font-size: 14px; font-style: normal; font-variant: 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=""><br class=""></div><div style="font-family: Palatino-Roman; font-size: 14px; font-style: normal; font-variant: 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=""><br class=""><blockquote type="cite" class=""><div class=""><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class=""><span class="Apple-tab-span" style="white-space: pre;"> </span>- Doug</div><div class=""><br class=""><blockquote type="cite" class=""><div class=""><div dir="ltr" class=""><div class="gmail_extra"><br class=""><div class="gmail_quote">On Tue, Jan 19, 2016 at 4:36 PM, Douglas Gregor<span class="Apple-converted-space"> </span><span dir="ltr" class=""><<a href="mailto:dgregor@apple.com" target="_blank" class="">dgregor@apple.com</a>></span><span class="Apple-converted-space"> </span>wrote:<br class=""><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-color: rgb(204, 204, 204); border-left-style: solid; padding-left: 1ex;"><div class="" style="word-wrap: break-word;"><br class=""><div class=""><span class=""><blockquote type="cite" class=""><div class="">On Jan 19, 2016, at 4:33 PM, Jacob Bandes-Storch <<a href="mailto:jtbandes@gmail.com" target="_blank" class="">jtbandes@gmail.com</a>> wrote:</div><br class=""><div class=""><div dir="ltr" class="">I'm fine with objc_selector(x.foo) or<span class="Apple-converted-space"> </span></div></div></blockquote><div class=""><br class=""></div><br class=""><blockquote type="cite" class=""><div class=""><div dir="ltr" class="">@selector(x.foo).</div></div></blockquote><div class=""><br class=""></div></span><div class="">@selector is a no-go: @ means “attribute” in Swift.</div><span class=""><br class=""><blockquote type="cite" class=""><div class=""><div dir="ltr" class=""> x.foo.selector is cute, but wouldn't this clash with property getters/setters?<br class=""></div></div></blockquote><div class=""><br class=""></div></span><div class="">It would only be available on values of function type that refer to @objc methods or initializers. We would (still) need a different mechanism to get at the selectors of getters or setters; SE-0022 didn’t solve this problem either.</div><div class=""><br class=""></div><span class="" style="white-space: pre-wrap;"> </span>- Doug</div><div class=""><div class="h5"><div class=""><br class=""><blockquote type="cite" class=""><div class=""><div dir="ltr" class=""><div class="gmail_extra"><br clear="all" class=""><div class=""><div class=""><div dir="ltr" class=""><div class="">Jacob<br class=""></div></div></div></div><br class=""><div class="gmail_quote">On Tue, Jan 19, 2016 at 4:21 PM, Douglas Gregor via swift-evolution<span class="Apple-converted-space"> </span><span dir="ltr" class=""><<a href="mailto:swift-evolution@swift.org" target="_blank" class="">swift-evolution@swift.org</a>></span><span class="Apple-converted-space"> </span>wrote:<br class=""><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-color: rgb(204, 204, 204); border-left-style: solid; padding-left: 1ex;"><div class="" style="word-wrap: break-word;"><br class=""><div class=""><blockquote type="cite" class=""><span class=""><div class="">On Jan 19, 2016, at 2:46 PM, David Hart <<a href="mailto:david@hartbit.com" target="_blank" class="">david@hartbit.com</a>> wrote:</div><br class=""></span><span class=""><div class=""><div class="" style="word-wrap: break-word;">What effect would that have? Would the options still return a type (Selector) that is CustomStringConvertible or would it just be compiler magic?</div></div></span></blockquote><div class=""><br class=""></div><div class="">Either way, we’ll return a Selector. The concern about “Selector(x.foo)” is that we would need special, ad hoc overload-resolution rules to decide between this magic syntax and other initializers of Selector. Making it a separate expression (“objc_selector(x.foo)”) or a special property on values of function type (“x.foo.selector”) eliminate that issue.</div><div class=""><br class=""></div><div class="">We’d love to hear everyone’s thoughts on those approaches.</div><div class=""><br class=""></div><span class="" style="white-space: pre-wrap;"> </span>- Doug</div><div class=""><div class=""><div class=""><br class=""><blockquote type="cite" class=""><div class=""><div class="" style="word-wrap: break-word;"><div class="">David.<br class=""><div class=""><br class=""><div class=""><blockquote type="cite" class=""><div class="">On 19 Jan 2016, at 23:43, Joe Groff via swift-evolution <<a href="mailto:swift-evolution@swift.org" target="_blank" class="">swift-evolution@swift.org</a>> wrote:</div><br class=""><div class=""><div class="" style="word-wrap: break-word;">We discussed this proposal during our core team review meeting, and concerns were raised about the implementability of the proposed 'Selector(Type.method)' syntax. Producing the selector is something that can't quite be modeled as a real initializer, so the type checker would have to perform heroics to disambiguate a selector literal reference from a proper initializer call. We recommend reconsidering alternative syntactic forms for referencing the selector. Potential options include:<div class=""><br class=""></div><div class="">- A unique prefix identifier, such as `objc_selector(Type.method)`, as you had originally proposed, or</div><div class="">- Taking advantage of the fact that functions don't have members to ascribe special behavior to 'Type.method.objcSelector', or something like it.</div><div class=""><br class=""></div><div class="">-Joe</div><div class=""><br class=""><div class=""><blockquote type="cite" class=""><div class="">On Jan 18, 2016, at 8:02 AM, Joe Groff via swift-evolution <<a href="mailto:swift-evolution@swift.org" target="_blank" class="">swift-evolution@swift.org</a>> wrote:</div><br class=""><div class=""><div class="" style="word-wrap: break-word;"><p class="" style="word-wrap: break-word; margin: 1.3125em 0px; line-height: 1.3125em;"><font color="#111111" face="Helvetica Neue, Helvetica, Arial, Verdana, sans-serif" class=""><span class="" style="font-size: 14px;">Hello Swift community,<br class=""><br class="">The review of “Referencing the Objective-C selector of a method” begins now and runs through January 23, 2016. The proposal is available here:<br class=""><br class=""><span class="" style="white-space: pre-wrap;"> </span><a href="https://github.com/apple/swift-evolution/blob/master/proposals/0022-objc-selectors.md" target="_blank" class="">https://github.com/apple/swift-evolution/blob/master/proposals/0022-objc-selectors.md</a><br class=""><br class="">Reviews are an important part of the Swift evolution process. All reviews should be sent to the swift-evolution mailing list at<br class=""><br class=""><span class="" style="white-space: pre-wrap;"> </span><a href="https://lists.swift.org/mailman/listinfo/swift-evolution" target="_blank" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</a><br class=""><br class="">or, if you would like to keep your feedback private, directly to the review manager.<br class=""><br class=""><b class="">What goes into a review?<br class=""></b><br class="">The goal of the review process is to improve the proposal under review through constructive criticism and, eventually, determine the direction of Swift. When writing your review, here are some questions you might want to answer in your review:<br class=""><br class=""></span></font></p><div class=""><font color="#111111" face="Helvetica Neue, Helvetica, Arial, Verdana, sans-serif" class=""><span class="" style="font-size: 14px;"><span class="" style="white-space: pre-wrap;"> </span>• What is your evaluation of the proposal?<br class=""></span></font></div><div class=""><font color="#111111" face="Helvetica Neue, Helvetica, Arial, Verdana, sans-serif" class=""><span class="" style="font-size: 14px;"><span class="" style="white-space: pre-wrap;"> </span>• Is the problem being addressed significant enough to warrant a change to Swift?<br class=""></span></font></div><div class=""><font color="#111111" face="Helvetica Neue, Helvetica, Arial, Verdana, sans-serif" class=""><span class="" style="font-size: 14px;"><span class="" style="white-space: pre-wrap;"> </span>• Does this proposal fit well with the feel and direction of Swift?<br class=""></span></font></div><div class=""><font color="#111111" face="Helvetica Neue, Helvetica, Arial, Verdana, sans-serif" class=""><span class="" style="font-size: 14px;"><span class="" style="white-space: pre-wrap;"> </span>• If you have you used other languages or libraries with a similar feature, how do you feel that this proposal compares to those?<br class=""></span></font></div><div class=""><font color="#111111" face="Helvetica Neue, Helvetica, Arial, Verdana, sans-serif" class=""><span class="" style="font-size: 14px;"><span class="" style="white-space: pre-wrap;"> </span>• How much effort did you put into your review? A glance, a quick reading, or an in-depth study?<br class=""></span></font></div><p class="" style="word-wrap: break-word; margin: 1.3125em 0px; line-height: 1.3125em;"><font color="#111111" face="Helvetica Neue, Helvetica, Arial, Verdana, sans-serif" class=""><span class="" style="font-size: 14px;">More information about the Swift evolution process is available at<br class=""><br class=""><span class="" style="white-space: pre-wrap;"> </span><a href="https://github.com/apple/swift-evolution/blob/master/process.md" target="_blank" class="">https://github.com/apple/swift-evolution/blob/master/process.md</a><br class=""><br class="">Thank you,<br class=""><br class="">-Joe<br class=""><br class="">Review Manager</span></font></p></div>_______________________________________________<br class="">swift-evolution mailing list<br class=""><a href="mailto:swift-evolution@swift.org" target="_blank" class="">swift-evolution@swift.org</a><br class=""><a href="https://lists.swift.org/mailman/listinfo/swift-evolution" target="_blank" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</a><br class=""></div></blockquote></div><br class=""></div></div>_______________________________________________<br class="">swift-evolution mailing list<br class=""><a href="mailto:swift-evolution@swift.org" target="_blank" class="">swift-evolution@swift.org</a><br class=""><a href="https://lists.swift.org/mailman/listinfo/swift-evolution" target="_blank" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</a><br class=""></div></blockquote></div><br class=""></div></div></div></div></blockquote></div><br class=""></div></div></div><br class="">_______________________________________________<br class="">swift-evolution mailing list<br class=""><a href="mailto:swift-evolution@swift.org" target="_blank" class="">swift-evolution@swift.org</a><br class=""><a href="https://lists.swift.org/mailman/listinfo/swift-evolution" rel="noreferrer" target="_blank" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</a><br class=""><br class=""></blockquote></div><br class=""></div></div></div></blockquote></div><br class=""></div></div></div></blockquote></div><br class=""></div></div></div></blockquote></div><br class=""></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="" style="font-family: Palatino-Roman; 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