<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Oops, left out that there's this horrifying way of writing it right now:<div class=""><br class=""></div><div class=""><div class=""><font face="Menlo" class="">extension Collection {</font></div><div class=""><font face="Menlo" class=""> func index(_ i: Index! = nil, offsetBy n: IndexDistance) -> Index {</font></div><div class=""><font face="Menlo" class=""> let i = i ?? startIndex</font></div><div class=""><font face="Menlo" class=""> // ...</font></div><div class=""><font face="Menlo" class=""> }</font></div><div class=""><font face="Menlo" class="">}</font></div></div><div class=""><br class=""></div><div class="">Nobody wants that.</div><div class=""><br class=""></div></body></html>