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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>Look for <a href="https://github.com/apple/swift-evolution/blob/master/commonly_proposed.md#miscellaneous">Disjunctions (logical ORs) in type constraints</a>. ;)</p>
<p>It’s rejected.</p>
<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_1486070902719847936" 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 2. Februar 2017 um 22:26:44, Rex Fenley via swift-evolution (<a href="mailto:swift-evolution@swift.org">swift-evolution@swift.org</a>) schrieb:</p> <blockquote type="cite" class="clean_bq"><span><div><div></div><div>
<title></title>
<div dir="ltr">Hello, I believe there was some discussion about
this quite awhile ago. I was wondering if there's any interest in
including a protocol 'or' type that would be the intersection of
two protocols. This could be really useful in situations where a
framework that the user has no control over implements a portion of
some often used protocol. Such as specialized collections from an
Database framework that don't implement RangeReplaceableCollection
but have a set of methods that are equivalent. The user can then
implement a protocol that is the intersection of those set of
methods and not duplicate code.
<div><br></div>
<div>Simplified example:</div>
<div><br></div>
<div>protocol Animal {</div>
<div> var hasEars: Bool { get }</div>
<div> func grow()</div>
<div>}</div>
<div><br></div>
<div>
<div>protocol Plant {</div>
<div> var isGreen: Bool { get }</div>
<div> func grow()</div>
<div>}</div>
<div><br></div>
<div>protocol LivingThing = Plant | Animal // or a different
syntax</div>
<div><br></div>
<div>LivingThing's is as follows</div>
<div>{</div>
<div> func grow()</div>
<div>}</div>
<div><br></div>
--<br>
<div class="gmail_signature">
<div dir="ltr">
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt">
<span><span style="font-size:16px;font-family:arial;background-color:transparent;font-style:italic;vertical-align:baseline;white-space:pre-wrap">
Rex Fenley</span> <span style="font-size:16px;font-family:arial;background-color:transparent;vertical-align:baseline;white-space:pre-wrap">
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</span><span style="font-size:11px;font-family:arial;color:rgb(153,153,153);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">IOS
DEVELOPER</span><br></span></p>
<span><br></span>
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