<div dir="ltr"><div class="markdown-here-wrapper" style=""><p style="margin:0px 0px 1.2em!important">A fundamental problem is, how do we get rid of <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">associatedtype</code> duplicates?</p>
<p style="margin:0px 0px 1.2em!important">A pedantic approach is to add trait operations for conformances:</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 class="hljs language-swift" 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;display:block;overflow-x:auto;padding:0.5em;color:rgb(51,51,51);background:rgb(248,248,248)"><span class="hljs-class"><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">protocol</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">Constructible</span> </span>{
associatedtype <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Value</span>
<span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">init</span>(<span class="hljs-number" style="color:rgb(0,128,128)">_</span> value: <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Value</span>)
}
<span class="hljs-class"><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">struct</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">MyStruct</span> </span>{
conformance <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Constructible</span> {
rename associatedtype <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">ValueInt</span> = <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Value</span>
}
conformance <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Constructible</span> {
rename associatedtype <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">ValueString</span> = <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Value</span>
}
<span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">typealias</span> <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">ValueInt</span> = <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Int</span> <span class="hljs-comment" style="color:rgb(153,153,136);font-style:italic">// or can be inferred</span>
<span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">init</span>(<span class="hljs-number" style="color:rgb(0,128,128)">_</span> value: <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Int</span>)
<span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">typealias</span> <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">ValueString</span> = <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">String</span> <span class="hljs-comment" style="color:rgb(153,153,136);font-style:italic">// or can be inferred</span>
<span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">init</span>(<span class="hljs-number" style="color:rgb(0,128,128)">_</span> value: <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">String</span>)
}
</code></pre>
<p style="margin:0px 0px 1.2em!important">This way, if there is a if there is a conflicting member, which does not use any of the associated types, like <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">func foo()</code>, then we can give it different meanings in different conformances.<br>Although this approach is the most clean one from theoreticall point of view, choosing different names for associated types would not look very good in practise.</p>
<p style="margin:0px 0px 1.2em!important">One possible solution is to <em>always</em> automatically match <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">associatedtype</code>s, without using <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">typealias</code>es.</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 class="hljs language-swift" 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;display:block;overflow-x:auto;padding:0.5em;color:rgb(51,51,51);background:rgb(248,248,248)"><span class="hljs-class"><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">protocol</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">ConstructibleFromBoth</span> </span>{
associatedtype <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">First</span>
associatedtype <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Second</span>
<span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">init</span>(first: <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">First</span>)
<span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">init</span>(second: <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Second</span>)
}
<span class="hljs-class"><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">struct</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">MyStruct</span> : <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">ConstructibleFromBoth</span> </span>{
<span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">init</span>(first: <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Int</span>)
<span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">init</span>(second: <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Double</span>)
}
<span class="hljs-class"><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">extension</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">MyStruct</span> </span>{
<span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">init</span>(first: <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">String</span>) <span class="hljs-comment" style="color:rgb(153,153,136);font-style:italic">// now there are 2 distinct conformances</span>
}
<span class="hljs-class"><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">extension</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">MyStruct</span> </span>{
<span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">init</span>(second: <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Float</span>) <span class="hljs-comment" style="color:rgb(153,153,136);font-style:italic">// now there are 4 distinct conformances</span>
}
</code></pre>
<p style="margin:0px 0px 1.2em!important">It introduces another potentially exponential algorithm for compiler. Although, does it? During a conformance test in some generic function, compiler will need to only find the first match or two.<br>Anyway, I guess, people would prefer to state explicitly that a type conforms to multiple versions of a protocol.</p>
<p style="margin:0px 0px 1.2em!important">Attempt #3. We can resolve the conflict between associated types, if we delete (if trait sense) confliting associated types from the type. But with extensions, all associated types can be made conflicting. So there needs to be some attribute, marking, which of the associated types we don’t want. It can lie at the place of conformance:</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 class="hljs language-swift" 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;display:block;overflow-x:auto;padding:0.5em;color:rgb(51,51,51);background:rgb(248,248,248)"><span class="hljs-class"><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">struct</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">MyStruct</span> </span>{ }
<span class="hljs-class"><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">extension</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">MyStruct</span> : @<span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">dontCreateTypealiases</span> (<span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">Constructible</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">where</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">Value</span> == <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">Int</span>) </span>{ ... }
<span class="hljs-class"><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">extension</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">MyStruct</span> : @<span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">dontCreateTypealiases</span> (<span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">Constructible</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">where</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">Value</span> == <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">String</span>) </span>{ ... }
<span class="hljs-comment" style="color:rgb(153,153,136);font-style:italic">// MyStruct.Value.self // error, no such type</span>
<span class="hljs-class"><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">struct</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">NormalConformanceTest</span> : <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">Constructible</span> </span>{ <span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">init</span>(<span class="hljs-number" style="color:rgb(0,128,128)">_</span> value: <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Float</span>) }
<span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">NormalConformanceTest</span>.<span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Value</span>.<span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">self</span> <span class="hljs-comment" style="color:rgb(153,153,136);font-style:italic">//=> Float</span>
</code></pre>
<p style="margin:0px 0px 1.2em!important">Or we can let constrained protocols syntax carry this attribute by default:</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 class="hljs language-swift" 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;display:block;overflow-x:auto;padding:0.5em;color:rgb(51,51,51);background:rgb(248,248,248)"><span class="hljs-class"><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">extension</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">MyStruct</span> : (<span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">Constructible</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">where</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">Value</span> == <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">Int</span>) </span>{ ... }
<span class="hljs-comment" style="color:rgb(153,153,136);font-style:italic">// MyStruct.Value.self // error, no such type</span>
<span class="hljs-class"><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">struct</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">NormalConformanceTest</span>: <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">Constructible</span> </span>{ <span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">init</span>(<span class="hljs-number" style="color:rgb(0,128,128)">_</span> value: <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Float</span>) }
<span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">NormalConformanceTest</span>.<span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Value</span>.<span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">self</span> <span class="hljs-comment" style="color:rgb(153,153,136);font-style:italic">//=> Float</span>
</code></pre>
<p style="margin:0px 0px 1.2em!important">The only thing left to solve is generic protocol declaration syntax and protocol specialization syntax. I’d like to present two ways to do this. First, taking ideas from Rust:</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 class="hljs language-swift" 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;display:block;overflow-x:auto;padding:0.5em;color:rgb(51,51,51);background:rgb(248,248,248)"><span class="hljs-class"><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">protocol</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">ContainsCollection</span><<span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">Element</span>> </span>{
associatedtype <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">CollectionType</span> : <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Collection</span> <span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">where</span> <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">CollectionType</span>.<span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Element</span> == <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Element</span>
<span class="hljs-func"><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">func</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">collection</span><span class="hljs-params">()</span> -> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">CollectionType</span>
}
<span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">extension</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">String</span> : <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">ContainsCollection</span><span class="hljs-generics"><Character></span>, <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">ContainsCollection</span><span class="hljs-generics"><UnicodeScalar></span>, <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">ContainsCollection</span><span class="hljs-generics"><CChar></span> </span>{
<span class="hljs-func"><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">func</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">collection</span><span class="hljs-params">()</span> -> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">CharacterView</span>
<span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">func</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">collection</span><span class="hljs-params">()</span> -> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">UnicodeScalarView</span>
<span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">func</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">collection</span><span class="hljs-params">()</span> -> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">ContiguousArray</span><span class="hljs-generics"><CChar></span>
}</span>
</code></pre>
<p style="margin:0px 0px 1.2em!important">Generic parameters are used to disambiguate between different conformances, and associated types are just matched. Explicit <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">typealias</code> specifiction is prohibited, because conflicts.</p>
<p style="margin:0px 0px 1.2em!important">Second, without modifying current protocol declaration syntax:</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 class="hljs language-swift" 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;display:block;overflow-x:auto;padding:0.5em;color:rgb(51,51,51);background:rgb(248,248,248)"><span class="hljs-class"><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">protocol</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold;color:rgb(68,85,136);font-weight:bold">ContainsCollection</span> </span>{
associatedtype <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Element</span>
associatedtype <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">CollectionType</span> : <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Collection</span> <span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">where</span> <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">CollectionType</span>.<span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Element</span> == <span class="hljs-type" style="color:rgb(68,85,136);font-weight:bold">Element</span>
<span class="hljs-func"><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">func</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">collection</span><span class="hljs-params">()</span> -> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">CollectionType</span>
}
<span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">extension</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">String</span> : <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">ContainsCollection</span><span class="hljs-generics"><Element: Character></span>, <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">ContainsCollection</span><span class="hljs-generics"><Element: UnicodeScalar></span>, <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">ContainsCollection</span><span class="hljs-generics"><Element: CChar></span> </span>{
<span class="hljs-func"><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">func</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">collection</span><span class="hljs-params">()</span> -> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">CharacterView</span>
<span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">func</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">collection</span><span class="hljs-params">()</span> -> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">UnicodeScalarView</span>
<span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">func</span> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">collection</span><span class="hljs-params">()</span> -> <span class="hljs-title" style="color:rgb(153,0,0);font-weight:bold">ContiguousArray</span><span class="hljs-generics"><CChar></span>
}</span>
</code></pre>
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