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      <div class="chatlog__message-aside"><img class="chatlog__avatar" src="https://cdn.discordapp.com/avatars/296587674737704960/5d3c584499ce245b7129cda8c7ae00e9.png?size=512" alt="Avatar" loading="lazy"></div>
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        <div class="chatlog__header"><span class="chatlog__author" title="_rintaro" data-user-id="296587674737704960">rintaro</span> <a href="/channels/306995750418513920?category=main&amp;channel=swift-2&amp;message_id=772008663836655636"><span class="chatlog__timestamp" title="Saturday, October 31, 2020 8:06 AM"></span></a><a href="#chatlog__message-container-772008663836655636">10/31/2020 8:06 AM</a></div>
        <div class="chatlog__content chatlog__markdown"><span class="chatlog__markdown-preserve"><code class="chatlog__markdown-pre chatlog__markdown-pre--multiline nohighlight">protocol P { associatedtype Arg } struct S: P { typealias Arg = Int } extension P { static func bar(x: Arg) -&gt; S { S() } } func foo&lt;T: P&gt;(_: T) {} foo(.bar(x: 12))</code> なので、たぶんこれは無理と思います。</span></div>
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