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164 lines
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<p class='location'>Struct ScopeGuard</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.with_strategy">with_strategy</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Deref">Deref</a><a href="#impl-DerefMut">DerefMut</a><a href="#impl-Drop">Drop</a><a href="#impl-Debug">Debug</a></div></div><p class='location'><a href='index.html'>scopeguard</a></p><script>window.sidebarCurrent = {name: 'ScopeGuard', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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<h1 class='fqn'><span class='in-band'>Struct <a href='index.html'>scopeguard</a>::<wbr><a class="struct" href=''>ScopeGuard</a></span><span class='out-of-band'><span id='render-detail'>
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</span><a class='srclink' href='../src/scopeguard/lib.rs.html#260-266' title='goto source code'>[src]</a></span></h1>
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<pre class='rust struct'>pub struct ScopeGuard<T, F, S: <a class="trait" href="../scopeguard/trait.Strategy.html" title="trait scopeguard::Strategy">Strategy</a> = <a class="enum" href="../scopeguard/enum.Always.html" title="enum scopeguard::Always">Always</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(&mut T), </span> { /* fields omitted */ }</pre><div class='docblock'><p><code>ScopeGuard</code> is a scope guard that may own a protected value.</p>
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<p>If you place a guard in a local variable, the closure can
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run regardless how you leave the scope — through regular return or panic
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(except if panic or other code aborts; so as long as destructors run).
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It is run only once.</p>
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<p>The <code>S</code> parameter for <a href="Strategy.t.html"><code>Strategy</code></a> determines if
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the closure actually runs.</p>
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<p>The guard's closure will be called with a mut ref to the held value
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in the destructor. It's called only once.</p>
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<p>The <code>ScopeGuard</code> implements <code>Deref</code> so that you can access the inner value.</p>
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</div>
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<h2 id='methods' class='small-section-header'>
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Methods<a href='#methods' class='anchor'></a>
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</h2>
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<h3 id='impl' class='impl'><span class='in-band'><code>impl<T, F, S> <a class="struct" href="../scopeguard/struct.ScopeGuard.html" title="struct scopeguard::ScopeGuard">ScopeGuard</a><T, F, S> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(&mut T),<br> S: <a class="trait" href="../scopeguard/trait.Strategy.html" title="trait scopeguard::Strategy">Strategy</a>, </span></code><a href='#impl' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/scopeguard/lib.rs.html#267-283' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.with_strategy' class="method"><span id='with_strategy.v' class='invisible'><code>pub fn <a href='#method.with_strategy' class='fnname'>with_strategy</a>(v: T, dropfn: F) -> <a class="struct" href="../scopeguard/struct.ScopeGuard.html" title="struct scopeguard::ScopeGuard">ScopeGuard</a><T, F, S></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/scopeguard/lib.rs.html#276-282' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Create a <code>ScopeGuard</code> that owns <code>v</code> (accessible through deref) and calls
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<code>dropfn</code> when its destructor runs.</p>
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<p>The <code>Strategy</code> decides whether the scope guard's closure should run.</p>
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</div></div>
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<h2 id='implementations' class='small-section-header'>
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Trait Implementations<a href='#implementations' class='anchor'></a>
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</h2>
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<h3 id='impl-Deref' class='impl'><span class='in-band'><code>impl<T, F, S: <a class="trait" href="../scopeguard/trait.Strategy.html" title="trait scopeguard::Strategy">Strategy</a>> <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/deref/trait.Deref.html" title="trait core::ops::deref::Deref">Deref</a> for <a class="struct" href="../scopeguard/struct.ScopeGuard.html" title="struct scopeguard::ScopeGuard">ScopeGuard</a><T, F, S> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(&mut T), </span></code><a href='#impl-Deref' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/scopeguard/lib.rs.html#317-325' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='associatedtype.Target' class="type"><span id='Target.t' class='invisible'><code>type <a href='https://doc.rust-lang.org/nightly/core/ops/deref/trait.Deref.html#associatedtype.Target' class="type">Target</a> = T</code></span></h4>
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<div class='docblock'><p>The resulting type after dereferencing.</p>
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</div><h4 id='method.deref' class="method"><span id='deref.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/ops/deref/trait.Deref.html#tymethod.deref' class='fnname'>deref</a>(&self) -> &T</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/scopeguard/lib.rs.html#321-323' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Dereferences the value.</p>
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</div></div><h3 id='impl-DerefMut' class='impl'><span class='in-band'><code>impl<T, F, S: <a class="trait" href="../scopeguard/trait.Strategy.html" title="trait scopeguard::Strategy">Strategy</a>> <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/deref/trait.DerefMut.html" title="trait core::ops::deref::DerefMut">DerefMut</a> for <a class="struct" href="../scopeguard/struct.ScopeGuard.html" title="struct scopeguard::ScopeGuard">ScopeGuard</a><T, F, S> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(&mut T), </span></code><a href='#impl-DerefMut' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/scopeguard/lib.rs.html#327-333' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.deref_mut' class="method"><span id='deref_mut.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/ops/deref/trait.DerefMut.html#tymethod.deref_mut' class='fnname'>deref_mut</a>(&mut self) -> &mut T</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/scopeguard/lib.rs.html#330-332' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Mutably dereferences the value.</p>
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</div></div><h3 id='impl-Drop' class='impl'><span class='in-band'><code>impl<T, F, S: <a class="trait" href="../scopeguard/trait.Strategy.html" title="trait scopeguard::Strategy">Strategy</a>> <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/drop/trait.Drop.html" title="trait core::ops::drop::Drop">Drop</a> for <a class="struct" href="../scopeguard/struct.ScopeGuard.html" title="struct scopeguard::ScopeGuard">ScopeGuard</a><T, F, S> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(&mut T), </span></code><a href='#impl-Drop' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/scopeguard/lib.rs.html#335-343' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.drop' class="method"><span id='drop.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/ops/drop/trait.Drop.html#tymethod.drop' class='fnname'>drop</a>(&mut self)</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/scopeguard/lib.rs.html#338-342' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Executes the destructor for this type. <a href="https://doc.rust-lang.org/nightly/core/ops/drop/trait.Drop.html#tymethod.drop">Read more</a></p>
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</div></div><h3 id='impl-Debug' class='impl'><span class='in-band'><code>impl<T, F, S> <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="../scopeguard/struct.ScopeGuard.html" title="struct scopeguard::ScopeGuard">ScopeGuard</a><T, F, S> <span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a>,<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(&mut T),<br> S: <a class="trait" href="../scopeguard/trait.Strategy.html" title="trait scopeguard::Strategy">Strategy</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a>, </span></code><a href='#impl-Debug' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/scopeguard/lib.rs.html#345-355' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.fmt' class="method"><span id='fmt.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt' class='fnname'>fmt</a>(&self, f: &mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -> <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/scopeguard/lib.rs.html#350-354' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
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