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<h1 class='fqn'><span class='in-band'>Module <a href='../index.html'>core</a>::<wbr><a class="mod" href=''>convert</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>]
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</span><a class='srclink' href='../../src/core/convert.rs.html#11-455' title='goto source code'>[src]</a></span></h1>
<div class='docblock'><p>Traits for conversions between types.</p>
<p>The traits in this module provide a general way to talk about conversions
from one type to another. They follow the standard Rust conventions of
<code>as</code>/<code>into</code>/<code>from</code>.</p>
<p>Like many traits, these are often used as bounds for generic functions, to
support arguments of multiple types.</p>
<ul>
<li>Implement the <code>As*</code> traits for reference-to-reference conversions</li>
<li>Implement the <a href="trait.Into.html"><code>Into</code></a> trait when you want to consume the value in the conversion</li>
<li>The <a href="trait.From.html"><code>From</code></a> trait is the most flexible, useful for value <em>and</em> reference conversions</li>
<li>The <a href="trait.TryFrom.html"><code>TryFrom</code></a> and <a href="trait.TryInto.html"><code>TryInto</code></a> traits behave like <a href="trait.From.html"><code>From</code></a> and <a href="trait.Into.html"><code>Into</code></a>, but allow for the
conversion to fail</li>
</ul>
<p>As a library author, you should prefer implementing <a href="trait.From.html"><code>From<T></code></a> or
<a href="trait.TryFrom.html"><code>TryFrom<T></code></a> rather than <a href="trait.Into.html"><code>Into<U></code></a> or <a href="trait.TryInto.html"><code>TryInto<U></code></a>,
as <a href="trait.From.html"><code>From</code></a> and <a href="trait.TryFrom.html"><code>TryFrom</code></a> provide greater flexibility and offer
equivalent <a href="trait.Into.html"><code>Into</code></a> or <a href="trait.TryInto.html"><code>TryInto</code></a> implementations for free, thanks to a
blanket implementation in the standard library.</p>
<h1 id='generic-implementations' class='section-header'><a href='#generic-implementations'>Generic Implementations</a></h1>
<ul>
<li><a href="trait.AsRef.html"><code>AsRef</code></a> and <a href="trait.AsMut.html"><code>AsMut</code></a> auto-dereference if the inner type is a reference</li>
<li><a href="trait.From.html"><code>From</code></a><code><U> for T</code> implies <a href="trait.Into.html"><code>Into</code></a><code><T> for U</code></li>
<li><a href="trait.TryFrom.html"><code>TryFrom</code></a><code><U> for T</code> implies <a href="trait.TryInto.html"><code>TryInto</code></a><code><T> for U</code></li>
<li><a href="trait.From.html"><code>From</code></a> and <a href="trait.Into.html"><code>Into</code></a> are reflexive, which means that all types can
<code>into</code> themselves and <code>from</code> themselves</li>
</ul>
<p>See each trait for usage examples.</p>
</div><h2 id='traits' class='section-header'><a href="#traits">Traits</a></h2>
<table>
<tr class=' module-item'>
<td><a class="trait" href="trait.AsMut.html"
title='trait core::convert::AsMut'>AsMut</a></td>
<td class='docblock-short'>
<p>A cheap, mutable reference-to-mutable reference conversion.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="trait" href="trait.AsRef.html"
title='trait core::convert::AsRef'>AsRef</a></td>
<td class='docblock-short'>
<p>A cheap reference-to-reference conversion. Used to convert a value to a
reference value within generic code.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="trait" href="trait.From.html"
title='trait core::convert::From'>From</a></td>
<td class='docblock-short'>
<p>Simple and safe type conversions in to <code>Self</code>. It is the reciprocal of
<code>Into</code>.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="trait" href="trait.Into.html"
title='trait core::convert::Into'>Into</a></td>
<td class='docblock-short'>
<p>A conversion that consumes <code>self</code>, which may or may not be expensive. The
reciprocal of <a href="trait.From.html"><code>From</code></a>.</p>
</td>
</tr>
<tr class='unstable module-item'>
<td><a class="trait" href="trait.TryFrom.html"
title='trait core::convert::TryFrom'>TryFrom</a></td>
<td class='docblock-short'>
[<div class='stab unstable'>Experimental</div>] <p>Attempt to construct <code>Self</code> via a conversion.</p>
</td>
</tr>
<tr class='unstable module-item'>
<td><a class="trait" href="trait.TryInto.html"
title='trait core::convert::TryInto'>TryInto</a></td>
<td class='docblock-short'>
[<div class='stab unstable'>Experimental</div>] <p>An attempted conversion that consumes <code>self</code>, which may or may not be
expensive.</p>
</td>
</tr></table></section>
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