<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="">Thanks for your reply, Rien. I just tried this again, and now it seems that either is acceptable. Seems a little weird, but I guess I’d rather have more flexibility than less.<div class=""><br class=""></div><div class=""><div style="margin: 0px; line-height: normal; background-color: rgb(255, 255, 255);" class=""><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal;" class=""><span style="color: #ba2da2" class="">protocol</span> Powerable {</div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal; color: rgb(0, 132, 0);" class=""><span style="color: #000000" class=""> </span><span style="color: #ba2da2" class="">var</span><span style="color: #000000" class=""> isOn:</span><span style="color: #703daa" class="">Bool</span><span style="color: #000000" class=""> { </span><span style="color: #ba2da2" class="">get</span><span style="color: #000000" class=""> </span><span style="color: #ba2da2" class="">set</span><span style="color: #000000" class=""> } </span>// Must have get and set</div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal; color: rgb(0, 132, 0);" class=""><span style="color: #000000" class=""> </span><span style="color: #ba2da2" class="">var</span><span style="color: #000000" class=""> usesDC:</span><span style="color: #703daa" class="">Bool</span><span style="color: #000000" class=""> { </span><span style="color: #ba2da2" class="">get</span><span style="color: #000000" class=""> } </span>// Must have get, may have set</div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal;" class=""> <span style="color: #ba2da2" class="">func</span> turnOn()</div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal;" class=""> <span style="color: #ba2da2" class="">func</span> turnOff()</div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal;" class="">}</div><div style="font-family: Helvetica; font-size: 12px; margin: 0px; line-height: normal; min-height: 14px;" class=""><br class=""></div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal; color: rgb(112, 61, 170);" class=""><span style="color: #ba2da2" class="">class</span><span style="color: #000000" class=""> GPS : </span><span style="color: #4f8187" class="">Powerable</span><span style="color: #000000" class="">, </span>CustomStringConvertible<span style="color: #000000" class=""> {</span></div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal; color: rgb(0, 132, 0);" class=""><span style="color: #000000" class=""> </span>// Either of these work</div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal; color: rgb(0, 132, 0);" class="">// var description: String {</div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal; color: rgb(0, 132, 0);" class="">// return "I am a GPS"</div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal; color: rgb(0, 132, 0);" class="">// }</div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal;" class=""> <span style="color: #ba2da2" class="">var</span> description:<span style="color: #703daa" class="">String</span> = <span style="color: #d12f1b" class="">"I am a GPS"</span></div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal;" class=""> <span style="color: #ba2da2" class="">var</span> isOn: <span style="color: #703daa" class="">Bool</span> = <span style="color: #ba2da2" class="">false</span></div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal;" class=""> <span style="color: #ba2da2" class="">var</span> usesDC: <span style="color: #703daa" class="">Bool</span> = <span style="color: #ba2da2" class="">false</span></div><p style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal; min-height: 13px;" class=""> <br class="webkit-block-placeholder"></p><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal; color: rgb(0, 132, 0);" class=""><span style="color: #000000" class=""> </span>// does the obvious</div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal;" class=""> <span style="color: #ba2da2" class="">func</span> turnOn(){</div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal;" class=""> <span style="color: #4f8187" class="">isOn</span> = <span style="color: #ba2da2" class="">true</span></div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal;" class=""> }</div><p style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal; min-height: 13px;" class=""> <br class="webkit-block-placeholder"></p><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal; color: rgb(0, 132, 0);" class=""><span style="color: #000000" class=""> </span>// does the obvious</div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal;" class=""> <span style="color: #ba2da2" class="">func</span> turnOff() {</div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal;" class=""> <span style="color: #4f8187" class="">isOn</span> = <span style="color: #ba2da2" class="">false</span></div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal;" class=""> }</div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal;" class="">}</div><div style="font-family: Helvetica; font-size: 12px; margin: 0px; line-height: normal; min-height: 14px;" class=""><br class=""></div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal; color: rgb(0, 132, 0);" class=""><span style="color: #3e1e81" class="">print</span><span style="color: #000000" class="">(</span><span style="color: #4f8187" class="">GPS</span><span style="color: #000000" class="">()) </span>// output: I am a GPS (both cases)</div><div style="margin: 0px; line-height: normal;" class=""><span style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px;" class=""><br class=""></span></div><div style="margin: 0px; line-height: normal;" class=""><span style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px;" class="">Michael</span></div><div style="font-family: Menlo; font-size: 11px; margin: 0px; line-height: normal; color: rgb(0, 132, 0);" class=""><br class=""></div></div><div><blockquote type="cite" class=""><div class="">On Sep 8, 2017, at 1:21 PM, Rien <<a href="mailto:Rien@Balancingrock.nl" class="">Rien@Balancingrock.nl</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">It cannot be ‘stored’ I would think.<br class="">I always compute my implementations.<br class=""><br class="">Regards,<br class="">Rien<br class=""><br class="">Site: <a href="http://balancingrock.nl" class="">http://balancingrock.nl</a><br class="">Blog: <a href="http://swiftrien.blogspot.com" class="">http://swiftrien.blogspot.com</a><br class="">Github: <a href="http://github.com/Balancingrock" class="">http://github.com/Balancingrock</a><br class="">Project: <a href="http://swiftfire.nl" class="">http://swiftfire.nl</a> - An HTTP(S) web server framework in Swift<br class=""><br class=""><br class=""><br class=""><br class=""><br class=""><br class=""><br class=""><blockquote type="cite" class="">On 08 Sep 2017, at 19:47, Michael Rogers via swift-users <<a href="mailto:swift-users@swift.org" class="">swift-users@swift.org</a>> wrote:<br class=""><br class="">Quick question (for my own edification, as well as to demonstrate to my students the power of this mail list 😉), is CustomStringConvertible a stored property or a computed property? The docs say the latter, but when using Xcode’s fabulous FIX button, it seems to imply it’s a stored property. <br class=""><br class="">Michael<br class="">_______________________________________________<br class="">swift-users mailing list<br class=""><a href="mailto:swift-users@swift.org" class="">swift-users@swift.org</a><br class="">https://lists.swift.org/mailman/listinfo/swift-users<br class=""></blockquote><br class=""></div></div></blockquote></div><br class=""></div></body></html>