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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>Easy: <code>class SomeClass : Equatable {</code></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> <div id="bloop_sign_1499613359376552960" 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 9. Juli 2017 um 17:11:14, David Baraff via swift-users (<a href="mailto:swift-users@swift.org">swift-users@swift.org</a>) schrieb:</p> <blockquote type="cite" class="clean_bq"><span><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div></div><div>
<title></title>
Given 2-tuples of type (T1, T2), you should be able to invoke the
== operator if you could on both types T1 and T2, right? i.e.
<div class=""><br class=""></div>
<div class="">(“abc”, 3) == (“abc”, 4) // legal</div>
<div class=""><br class=""></div>
<div class="">but:</div>
<div class=""><br class=""></div>
<div class="">
<div style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">class SomeClass {</span></div>
<div style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures" class=""> static public func ==(_
lhs:</span><span style="font-variant-ligatures: no-common-ligatures; color: #9f35da" class="">SomeClass</span><span style="font-variant-ligatures: no-common-ligatures" class="">, _
rhs:</span><span style="font-variant-ligatures: no-common-ligatures; color: #9f35da" class="">SomeClass</span><span style="font-variant-ligatures: no-common-ligatures" class="">)
-></span> <span style="font-variant-ligatures: no-common-ligatures; color: #3495af" class="">Bool</span> <span style="font-variant-ligatures: no-common-ligatures" class="">{</span></div>
<div style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures" class=""> return lhs ===
rhs</span></div>
<div style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures" class=""> }</span></div>
<div style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">}</span></div>
<div style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo; min-height: 13px;" class=""><br class=""></div>
<div style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">let c1 =</span> <span style="font-variant-ligatures: no-common-ligatures; color: #9f35da" class="">SomeClass</span><span style="font-variant-ligatures: no-common-ligatures" class="">()</span></div>
<div style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">let c2 =</span> <span style="font-variant-ligatures: no-common-ligatures; color: #9f35da" class="">SomeClass</span><span style="font-variant-ligatures: no-common-ligatures" class="">()</span></div>
<div style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo; min-height: 13px;" class=""><br class=""></div>
<div style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">let t1 = (</span><span style="font-variant-ligatures: no-common-ligatures; color: #b4261a" class="">"abc"</span><span style="font-variant-ligatures: no-common-ligatures" class="">,</span>
<span style="font-variant-ligatures: no-common-ligatures; color: #0536ff" class="">c1</span><span style="font-variant-ligatures: no-common-ligatures" class="">)</span></div>
<div style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">let t2 = (</span><span style="font-variant-ligatures: no-common-ligatures; color: #b4261a" class="">"abc"</span><span style="font-variant-ligatures: no-common-ligatures" class="">,</span>
<span style="font-variant-ligatures: no-common-ligatures; color: #0536ff" class="">c2</span><span style="font-variant-ligatures: no-common-ligatures" class="">)</span></div>
<div style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo; min-height: 13px;" class=""><br class=""></div>
<div style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo; color: rgb(5, 54, 255);" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">c1</span> <span style="font-variant-ligatures: no-common-ligatures; color: #9f35da" class="">==</span> <span style="font-variant-ligatures: no-common-ligatures" class="">c2 //
legal</span></div>
<div style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures; color: #0536ff" class="">t1</span> <span style="font-variant-ligatures: no-common-ligatures" class="">==</span>
<span style="font-variant-ligatures: no-common-ligatures; color: #0536ff" class="">t2 // illegal</span></div>
<div style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures; color: #0536ff" class=""><br class=""></span></div>
<div style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo; min-height: 13px;" class=""><br class=""></div>
</div>
<div style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo; min-height: 13px;" class=""><br class=""></div>
<div style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo; min-height: 13px;" class=""><br class=""></div>
<div style="margin: 0px; line-height: normal; min-height: 13px;" class="">Why is t1 == t2 not legal given that c1 == c2 IS
legal?</div>
<div style="margin: 0px; line-height: normal; min-height: 13px;" class=""><br class=""></div>
<div style="margin: 0px; line-height: normal; min-height: 13px;" class=""><br class=""></div>
_______________________________________________<br>swift-users mailing list<br>swift-users@swift.org<br>https://lists.swift.org/mailman/listinfo/swift-users<br></div></div></span></blockquote></div><div class="bloop_markdown"><p></p></div></body></html>