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<h1 class="title">Universal Function Call Syntax</h1>
<p><small>There is a new edition of the book and this is an old link.</small></p>
<blockquote>
<p>Rust cannot prevent a trait from having a method with the same name as another trait’s method, nor can it prevent us from implementing both of these traits on one type.
In order to be able to call each of the methods with the same name, then, we need to tell Rust which one we want to use.</p>
</blockquote>
<pre class="rust rust-example-rendered">
<span class="kw">trait</span> <span class="ident">Pilot</span> {
<span class="kw">fn</span> <span class="ident">fly</span>(<span class="kw-2">&</span><span class="self">self</span>);
}
<span class="kw">trait</span> <span class="ident">Wizard</span> {
<span class="kw">fn</span> <span class="ident">fly</span>(<span class="kw-2">&</span><span class="self">self</span>);
}
<span class="kw">struct</span> <span class="ident">Human</span>;
<span class="kw">impl</span> <span class="ident">Pilot</span> <span class="kw">for</span> <span class="ident">Human</span> {
}
<span class="kw">impl</span> <span class="ident">Wizard</span> <span class="kw">for</span> <span class="ident">Human</span> {
}
<span class="kw">impl</span> <span class="ident">Human</span> {
}
<span class="kw">fn</span> <span class="ident">main</span>() {
<span class="kw">let</span> <span class="ident">person</span> <span class="op">=</span> <span class="ident">Human</span>;
<span class="ident">Pilot</span>::<span class="ident">fly</span>(<span class="kw-2">&</span><span class="ident">person</span>);
<span class="ident">Wizard</span>::<span class="ident">fly</span>(<span class="kw-2">&</span><span class="ident">person</span>);
<span class="ident">person</span>.<span class="ident">fly</span>();
}<a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=%23!%5Ballow(unused)%5D%0Atrait%20Pilot%20%7B%0A%20%20%20%20fn%20fly(%26self)%3B%0A%7D%0A%0Atrait%20Wizard%20%7B%0A%20%20%20%20fn%20fly(%26self)%3B%0A%7D%0A%0Astruct%20Human%3B%0A%0Aimpl%20Pilot%20for%20Human%20%7B%0A%20%20%20%20fn%20fly(%26self)%20%7B%0A%20%20%20%20%20%20%20%20println!(%22This%20is%20your%20captain%20speaking.%22)%3B%0A%20%20%20%20%7D%0A%7D%0A%0Aimpl%20Wizard%20for%20Human%20%7B%0A%20%20%20%20fn%20fly(%26self)%20%7B%0A%20%20%20%20%20%20%20%20println!(%22Up!%22)%3B%0A%20%20%20%20%7D%0A%7D%0A%0Aimpl%20Human%20%7B%0A%20%20%20%20fn%20fly(%26self)%20%7B%0A%20%20%20%20%20%20%20%20println!(%22*waving%20arms%20furiously*%22)%3B%0A%20%20%20%20%7D%0A%7D%0A%0Afn%20main()%20%7B%0A%20%20%20%20let%20person%20%3D%20Human%3B%0A%20%20%20%20Pilot%3A%3Afly(%26person)%3B%0A%20%20%20%20Wizard%3A%3Afly(%26person)%3B%0A%20%20%20%20person.fly()%3B%0A%7D">Run</a></pre>
<hr />
<p>Here are the relevant sections in the new and old books:</p>
<ul>
<li><strong><a href="second-edition/ch19-03-advanced-traits.html#fully-qualified-syntax-for-disambiguation-calling-methods-with-the-same-name">In the second edition: Ch 19.03 — Advanced Traits, section Fully Qualified Syntax</a></strong></li>
<li><small><a href="first-edition/ufcs.html">In the first edition: Ch 3.24 — Universal Function Call Syntax</a></small></li>
</ul>
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