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<p class='location'>Struct TypeId</p><div class="block items"><ul><li><a href="#methods">Methods</a></li><li><a href="#implementations">Trait Implementations</a></li></ul></div><p class='location'><a href='../index.html'>core</a>::<wbr><a href='index.html'>any</a></p><script>window.sidebarCurrent = {name: 'TypeId', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script>
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<h1 class='fqn'><span class='in-band'>Struct <a href='../index.html'>core</a>::<wbr><a href='index.html'>any</a>::<wbr><a class="struct" href=''>TypeId</a></span><span class='out-of-band'><span class='since' title='Stable since Rust version 1.0.0'>1.0.0</span><span id='render-detail'>
<a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
[<span class='inner'>−</span>]
</a>
</span><a class='srclink' href='../../src/core/any.rs.html#347-349' title='goto source code'>[src]</a></span></h1>
<pre class='rust struct'>pub struct TypeId { /* fields omitted */ }</pre><div class='docblock'><p>A <code>TypeId</code> represents a globally unique identifier for a type.</p>
<p>Each <code>TypeId</code> is an opaque object which does not allow inspection of what's
inside but does allow basic operations such as cloning, comparison,
printing, and showing.</p>
<p>A <code>TypeId</code> is currently only available for types which ascribe to <code>'static</code>,
but this limitation may be removed in the future.</p>
<p>While <code>TypeId</code> implements <code>Hash</code>, <code>PartialOrd</code>, and <code>Ord</code>, it is worth
noting that the hashes and ordering will vary between Rust releases. Beware
of relying on them outside of your code!</p>
</div><h2 id='methods'>Methods</h2><h3 class='impl'><span class='in-band'><code>impl <a class="struct" href="../../core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/any.rs.html#351-375' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.of' class="method"><span id='of.v' class='invisible'><code>fn <a href='#method.of' class='fnname'>of</a><T: ?<a class="trait" href="../../core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + 'static>() -> <a class="struct" href="../../core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></code></span></h4>
<div class='docblock'><p>Returns the <code>TypeId</code> of the type this generic function has been
instantiated with.</p>
<h1 id='examples' class='section-header'><a href='#examples'>Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">any</span>::{<span class="ident">Any</span>, <span class="ident">TypeId</span>};
<span class="kw">fn</span> <span class="ident">is_string</span><span class="op"><</span><span class="ident">T</span>: <span class="question-mark">?</span><span class="ident">Sized</span> <span class="op">+</span> <span class="ident">Any</span><span class="op">></span>(<span class="ident">_s</span>: <span class="kw-2">&</span><span class="ident">T</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="ident">TypeId</span>::<span class="ident">of</span>::<span class="op"><</span><span class="ident">String</span><span class="op">></span>() <span class="op">==</span> <span class="ident">TypeId</span>::<span class="ident">of</span>::<span class="op"><</span><span class="ident">T</span><span class="op">></span>()
}
<span class="kw">fn</span> <span class="ident">main</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">is_string</span>(<span class="kw-2">&</span><span class="number">0</span>), <span class="bool-val">false</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">is_string</span>(<span class="kw-2">&</span><span class="string">"cookie monster"</span>.<span class="ident">to_string</span>()), <span class="bool-val">true</span>);
}<a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=use%20std%3A%3Aany%3A%3A%7BAny%2C%20TypeId%7D%3B%0A%0Afn%20is_string%3CT%3A%20%3FSized%20%2B%20Any%3E(_s%3A%20%26T)%20-%3E%20bool%20%7B%0A%20%20%20%20TypeId%3A%3Aof%3A%3A%3CString%3E()%20%3D%3D%20TypeId%3A%3Aof%3A%3A%3CT%3E()%0A%7D%0A%0Afn%20main()%20%7B%0A%20%20%20%20assert_eq!(is_string(%260)%2C%20false)%3B%0A%20%20%20%20assert_eq!(is_string(%26%22cookie%20monster%22.to_string())%2C%20true)%3B%0A%7D%0A">Run</a></pre>
</div></div><h2 id='implementations'>Trait Implementations</h2><h3 class='impl'><span class='in-band'><code>impl <a class="trait" href="../../core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="../../core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/any.rs.html#345' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.clone' class="method"><span id='clone.v' class='invisible'><code>fn <a href='../../core/clone/trait.Clone.html#tymethod.clone' class='fnname'>clone</a>(&self) -> <a class="struct" href="../../core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></code></span></h4>
<div class='docblock'><p>Returns a copy of the value. <a href="../../core/clone/trait.Clone.html#tymethod.clone">Read more</a></p>
</div><h4 id='method.clone_from' class="method"><span id='clone_from.v' class='invisible'><code>fn <a href='../../core/clone/trait.Clone.html#method.clone_from' class='fnname'>clone_from</a>(&mut self, source: &Self)</code></span></h4>
<div class='docblock'><p>Performs copy-assignment from <code>source</code>. <a href="../../core/clone/trait.Clone.html#method.clone_from">Read more</a></p>
</div></div><h3 class='impl'><span class='in-band'><code>impl <a class="trait" href="../../core/marker/trait.Copy.html" title="trait core::marker::Copy">Copy</a> for <a class="struct" href="../../core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/any.rs.html#345' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'></div><h3 class='impl'><span class='in-band'><code>impl <a class="trait" href="../../core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a> for <a class="struct" href="../../core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/any.rs.html#345' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.eq' class="method"><span id='eq.v' class='invisible'><code>fn <a href='../../core/cmp/trait.PartialEq.html#tymethod.eq' class='fnname'>eq</a>(&self, __arg_0: &<a class="struct" href="../../core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a>) -> bool</code></span></h4>
<div class='docblock'><p>This method tests for <code>self</code> and <code>other</code> values to be equal, and is used by <code>==</code>. <a href="../../core/cmp/trait.PartialEq.html#tymethod.eq">Read more</a></p>
</div><h4 id='method.ne' class="method"><span id='ne.v' class='invisible'><code>fn <a href='../../core/cmp/trait.PartialEq.html#method.ne' class='fnname'>ne</a>(&self, __arg_0: &<a class="struct" href="../../core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a>) -> bool</code></span></h4>
<div class='docblock'><p>This method tests for <code>!=</code>.</p>
</div></div><h3 class='impl'><span class='in-band'><code>impl <a class="trait" href="../../core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> for <a class="struct" href="../../core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/any.rs.html#345' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'></div><h3 class='impl'><span class='in-band'><code>impl <a class="trait" href="../../core/cmp/trait.PartialOrd.html" title="trait core::cmp::PartialOrd">PartialOrd</a> for <a class="struct" href="../../core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/any.rs.html#345' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.partial_cmp' class="method"><span id='partial_cmp.v' class='invisible'><code>fn <a href='../../core/cmp/trait.PartialOrd.html#tymethod.partial_cmp' class='fnname'>partial_cmp</a>(&self, __arg_0: &<a class="struct" href="../../core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a>) -> <a class="enum" href="../../core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="enum" href="../../core/cmp/enum.Ordering.html" title="enum core::cmp::Ordering">Ordering</a>></code></span></h4>
<div class='docblock'><p>This method returns an ordering between <code>self</code> and <code>other</code> values if one exists. <a href="../../core/cmp/trait.PartialOrd.html#tymethod.partial_cmp">Read more</a></p>
</div><h4 id='method.lt' class="method"><span id='lt.v' class='invisible'><code>fn <a href='../../core/cmp/trait.PartialOrd.html#method.lt' class='fnname'>lt</a>(&self, __arg_0: &<a class="struct" href="../../core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a>) -> bool</code></span></h4>
<div class='docblock'><p>This method tests less than (for <code>self</code> and <code>other</code>) and is used by the <code><</code> operator. <a href="../../core/cmp/trait.PartialOrd.html#method.lt">Read more</a></p>
</div><h4 id='method.le' class="method"><span id='le.v' class='invisible'><code>fn <a href='../../core/cmp/trait.PartialOrd.html#method.le' class='fnname'>le</a>(&self, __arg_0: &<a class="struct" href="../../core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a>) -> bool</code></span></h4>
<div class='docblock'><p>This method tests less than or equal to (for <code>self</code> and <code>other</code>) and is used by the <code><=</code> operator. <a href="../../core/cmp/trait.PartialOrd.html#method.le">Read more</a></p>
</div><h4 id='method.gt' class="method"><span id='gt.v' class='invisible'><code>fn <a href='../../core/cmp/trait.PartialOrd.html#method.gt' class='fnname'>gt</a>(&self, __arg_0: &<a class="struct" href="../../core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a>) -> bool</code></span></h4>
<div class='docblock'><p>This method tests greater than (for <code>self</code> and <code>other</code>) and is used by the <code>></code> operator. <a href="../../core/cmp/trait.PartialOrd.html#method.gt">Read more</a></p>
</div><h4 id='method.ge' class="method"><span id='ge.v' class='invisible'><code>fn <a href='../../core/cmp/trait.PartialOrd.html#method.ge' class='fnname'>ge</a>(&self, __arg_0: &<a class="struct" href="../../core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a>) -> bool</code></span></h4>
<div class='docblock'><p>This method tests greater than or equal to (for <code>self</code> and <code>other</code>) and is used by the <code>>=</code> operator. <a href="../../core/cmp/trait.PartialOrd.html#method.ge">Read more</a></p>
</div></div><h3 class='impl'><span class='in-band'><code>impl <a class="trait" href="../../core/cmp/trait.Ord.html" title="trait core::cmp::Ord">Ord</a> for <a class="struct" href="../../core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/any.rs.html#345' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.cmp' class="method"><span id='cmp.v' class='invisible'><code>fn <a href='../../core/cmp/trait.Ord.html#tymethod.cmp' class='fnname'>cmp</a>(&self, __arg_0: &<a class="struct" href="../../core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a>) -> <a class="enum" href="../../core/cmp/enum.Ordering.html" title="enum core::cmp::Ordering">Ordering</a></code></span></h4>
<div class='docblock'><p>This method returns an <code>Ordering</code> between <code>self</code> and <code>other</code>. <a href="../../core/cmp/trait.Ord.html#tymethod.cmp">Read more</a></p>
</div></div><h3 class='impl'><span class='in-band'><code>impl <a class="trait" href="../../core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="../../core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/any.rs.html#345' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.fmt' class="method"><span id='fmt.v' class='invisible'><code>fn <a href='../../core/fmt/trait.Debug.html#tymethod.fmt' class='fnname'>fmt</a>(&self, __arg_0: &mut <a class="struct" href="../../core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -> <a class="type" href="../../core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code></span></h4>
<div class='docblock'><p>Formats the value using the given formatter.</p>
</div></div><h3 class='impl'><span class='in-band'><code>impl <a class="trait" href="../../core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a> for <a class="struct" href="../../core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/any.rs.html#345' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.hash' class="method"><span id='hash.v' class='invisible'><code>fn <a href='../../core/hash/trait.Hash.html#tymethod.hash' class='fnname'>hash</a><__H: <a class="trait" href="../../core/hash/trait.Hasher.html" title="trait core::hash::Hasher">Hasher</a>>(&self, __arg_0: &mut __H)</code></span></h4>
<div class='docblock'><p>Feeds this value into the given [<code>Hasher</code>]. <a href="../../core/hash/trait.Hash.html#tymethod.hash">Read more</a></p>
</div><h4 id='method.hash_slice' class="method"><span id='hash_slice.v' class='invisible'><code>fn <a href='../../core/hash/trait.Hash.html#method.hash_slice' class='fnname'>hash_slice</a><H: <a class="trait" href="../../core/hash/trait.Hasher.html" title="trait core::hash::Hasher">Hasher</a>>(data: &[Self], state: &mut H) <span class="where fmt-newline">where<br> Self: <a class="trait" href="../../core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code><div class='since' title='Stable since Rust version 1.3.0'>1.3.0</div></span></h4>
<div class='docblock'><p>Feeds a slice of this type into the given [<code>Hasher</code>]. <a href="../../core/hash/trait.Hash.html#method.hash_slice">Read more</a></p>
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