<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=""><blockquote type="cite" class="">On May 27, 2016, at 9:31 AM, plx via swift-evolution <<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a>> wrote:<br class=""></blockquote><div><blockquote type="cite" class=""><br class="Apple-interchange-newline"><div class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: 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; float: none; display: inline !important;" class="">For the Sequence/Collection it’s a lot of work for IMHO a rather minor convenience, but for more-complex type associated-type relationships it could start to pay its own way.</span></div></blockquote></div><br class=""><div class="">Is it really that minor, though? For something so commonly encountered as methods that take sequences/collections, this:</div><div class=""><br class=""></div><div class="">func doSomething(foos: [Foo], bars: [Bar], bazzes: [Baz])</div><div class=""><br class=""></div><div class="">is not only a whole lot easier to type, but is worlds clearer to read than:</div><div class=""><br class=""></div><div class="">func doSomething<S: SequenceType, T: SequenceType, U: SequenceType where S.Generator.Element == Foo, T.Generator.Element == Bar, U.Generator.Element == Baz>(foos: S, bars: T, bazzes: U)</div><div class=""><br class=""></div><div class="">Not only is the latter line intimidating to look at as is, but it separates the contained type from the parameters themselves. Given how unwieldy this second form is, it seems almost certain that the former line will be used more frequently in the real world.</div><div class=""><br class=""></div><div class="">Charles</div><div class=""><br class=""></div></body></html>