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.error { color:#AA0000; }</style></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="bloop_markdown"><p>Okay fine. I’m curious if we ever should be able to extend existentials. (Could be really handy.)</p>
<pre><code class="swift">typealias FooView = UIView & Foo
extension FooView {
func foo() { .. }
}
// vs.
extension UIView where Self : Foo { .. }
</code></pre>
<p></p></div><div class="bloop_original_html"><style>body{font-family:Helvetica,Arial;font-size:13px}</style><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div> <br> <div id="bloop_sign_1486404426908973824" class="bloop_sign"><div style="font-family:helvetica,arial;font-size:13px">-- <br>Adrian Zubarev<br>Sent with Airmail</div></div> <br><p class="airmail_on">Am 6. Februar 2017 um 19:06:16, Anton Zhilin (<a href="mailto:antonyzhilin@gmail.com">antonyzhilin@gmail.com</a>) schrieb:</p> <blockquote type="cite" class="clean_bq"><span><div><div></div><div>
<title></title>
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<div class="markdown-here-wrapper" style="">
<p style="margin:0px 0px 1.2em!important">If I understand
correctly, extension of a typealias should be strictly equivalent
to extension of type on the right:</p>
<pre style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;font-size:1em;line-height:1.2em;margin:1.2em 0px"><code style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(234,234,234);background-color:rgb(248,248,248);border-radius:3px;display:inline;white-space:pre;overflow:auto;border-radius:3px;border:1px solid rgb(204,204,204);padding:0.5em 0.7em;display:block!important">extension Any<class> {
func foo()
}
</code></pre>
<p style="margin:0px 0px 1.2em!important">And <code style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(234,234,234);background-color:rgb(248,248,248);border-radius:3px;display:inline">
Any<...></code> are not nominal types, so until we
additionally allow extensions for non-nominal types, this will not
compile.</p>
<p style="margin:0px 0px 1.2em!important">2017-02-06 20:51
GMT+03:00 Adrian Zubarev via swift-evolution <<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>>:</p>
<p style="margin:0px 0px 1.2em!important"></p>
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<p>Just imagining the future. Iff this request will made into the
language and we had <code>typealias AnyObject =
Any<class></code>, would the following be valid?</p>
<pre><code class="m_-4622872053031977381swift">extension AnyObject {
func foo()
}</code></pre></div>
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