<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><blockquote type="cite" class=""><div class=""><div style="font-family: Helvetica; font-size: 12px; 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=""><div class="">I don’t see how this:</div><div class=""><br class=""></div><div class="">protocol P {</div><div class=""> type/*alias*/ A</div><div class="">}</div><div class=""><br class=""></div><div class="">struct X : P {</div><div class=""> struct A {}</div><div class="">}</div><div class=""><br class=""></div>is fundamentally any different from:</div><div style="font-family: Helvetica; font-size: 12px; 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: Helvetica; font-size: 12px; 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=""><div class="">protocol P {</div><div class=""> func f()</div><div class="">}</div><div class=""><br class=""></div><div class="">struct X : P {</div><div class=""> func f() {}</div><div class="">}</div><div class=""><br class=""></div><div class="">What am I missing?</div></div></div></blockquote><div><br class=""></div></div>I'd say it's the fact that adding an associated type turns a protocol into a frankenprotocol, and we don't want that to be cast upon innocent souls without a proper curse word (like "associatedtype").<div class=""><br class=""></div><div class="">Also, maybe some day we'll have normal type requirements — something that has to be defined in a protocol, but does not turn it into a frankenprotocol than nobody can use anymore. That would be an appropriate use of the normal-looking keywords.<br class=""><div class=""><br class=""></div><div class="">A.</div><div class=""><br class=""></div></div></body></html>