<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Jul 1, 2016, at 2:06 AM, Cao Jiannan 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=""><meta http-equiv="Content-Type" content="text/html charset=us-ascii" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><a href="https://github.com/frogcjn/swift-evolution/blob/master/proposals/xxxx-union-type.md" class="">https://github.com/frogcjn/swift-evolution/blob/master/proposals/xxxx-union-type.md</a><div class=""><br class=""></div><div class=""><div class="">Hi,</div><div class=""><br class=""></div><div class="">I'm now officially proposal the union type feature for Swift. Please see:</div></div></div></div></blockquote><br class=""></div><div>FYI, this is clearly out of scope for Swift 3. Please wait until Swift 3 is wound down before bringing this up. Also beware that this topic has come up several times before and there are major semantic problems with it. Please familiarize yourself with those previous discussions.</div><div><br class=""></div><div>-Chris</div></body></html>