<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>The code is for a delegate. Thus it needs a protocol not a class. </div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">If you use a class and not a protocol, your delegate wont be able to subclass any other class to implement the "protocol" because it is a class.</div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">The same applies if the uitableview delegate was declared as a class. You couldn't subclass a viewcontroller and still conform to the tableview delegate protocol.</div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">Joao</div><div id="AppleMailSignature"><br>Sent from my iPhone</div><div><br>On 17 Feb 2016, at 21:12, Sune Foldager <<a href="mailto:cyano@me.com">cyano@me.com</a>> wrote:<br><br></div><blockquote type="cite"><div><meta http-equiv="Content-Type" content="text/html charset=utf-8"><br class=""><div><blockquote type="cite" class=""><div class="">On 17 Feb 2016, at 18:59, João Nunes 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: Helvetica; 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=""><span style="background-color: rgba(255, 255, 255, 0);" class="">In the example given. How would you restrict the generic type to a protocol without the use of AnyProtocol ?</span></div></div></blockquote><div><br class=""></div>But what would you gain from restricting to just protocols? What could go wrong if someone passed in a class?</div><div><br class=""></div><div>-Sune</div><div><br class=""></div></div></blockquote></body></html>