mentat/docs/apis/0.7/swift/Classes/OptionalRustObject.html
Emily Toop da599c3a78 Fix broken documentation links. (#775) (#767) r=nalexander
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2018-06-29 10:28:44 -07:00

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OptionalRustObject Class Reference
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<article class="main-content">
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<h1>OptionalRustObject</h1>
<div class="declaration">
<div class="language">
<pre class="highlight swift"><code><span class="kd">open</span> <span class="kd">class</span> <span class="kt">OptionalRustObject</span> <span class="p">:</span> <span class="kt">Destroyable</span></code></pre>
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<p>Base class that wraps an optional <code>OpaquePointer</code> representing a pointer to a Rust object.
This class should be used to wrap Rust pointer that point to consuming structs, that is, calling a function
for that Rust pointer, will cause Rust to destroy the pointer, leaving the Swift pointer dangling.
These classes are responsible for ensuring that their raw <code>OpaquePointer</code> are <code>nil</code>led after calling a consuming
FFI function.
This class provides cleanup functions on deinit, ensuring that all classes
that inherit from it will have their <code>OpaquePointer</code> destroyed when the Swift wrapper is destroyed.
If a class does not override <code>cleanup</code> then a <code>fatalError</code> is thrown.
The optional pointer is managed here such that is the pointer is nil, then the cleanup function is not called
ensuring that we do not double free the pointer on exit.</p>
</section>
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<code>
<a name="/s:6Mentat18OptionalRustObjectCACSv3raw_tcfc"></a>
<a name="//apple_ref/swift/Method/init(raw:)" class="dashAnchor"></a>
<a class="token" href="#/s:6Mentat18OptionalRustObjectCACSv3raw_tcfc">init(raw:)</a>
</code>
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<div class="pointer"></div>
<div class="abstract">
<p>Undocumented</p>
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<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="nf">init</span><span class="p">(</span><span class="nv">raw</span><span class="p">:</span> <span class="kt">UnsafeMutableRawPointer</span><span class="p">)</span></code></pre>
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<code>
<a name="/s:6Mentat18OptionalRustObjectCACs13OpaquePointerVSg3raw_tcfc"></a>
<a name="//apple_ref/swift/Method/init(raw:)" class="dashAnchor"></a>
<a class="token" href="#/s:6Mentat18OptionalRustObjectCACs13OpaquePointerVSg3raw_tcfc">init(raw:)</a>
</code>
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<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Undocumented</p>
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<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="nf">init</span><span class="p">(</span><span class="nv">raw</span><span class="p">:</span> <span class="kt">OpaquePointer</span><span class="p">?)</span></code></pre>
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<code>
<a name="/s:6Mentat18OptionalRustObjectC6getRaws13OpaquePointerVSgyF"></a>
<a name="//apple_ref/swift/Method/getRaw()" class="dashAnchor"></a>
<a class="token" href="#/s:6Mentat18OptionalRustObjectC6getRaws13OpaquePointerVSgyF">getRaw()</a>
</code>
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<div class="pointer-container"></div>
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<div class="pointer"></div>
<div class="abstract">
<p>Undocumented</p>
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<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">getRaw</span><span class="p">()</span> <span class="o">-&gt;</span> <span class="kt">OpaquePointer</span><span class="p">?</span></code></pre>
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<code>
<a name="/s:6Mentat18OptionalRustObjectC12validPointers06OpaqueF0VyKF"></a>
<a name="//apple_ref/swift/Method/validPointer()" class="dashAnchor"></a>
<a class="token" href="#/s:6Mentat18OptionalRustObjectC12validPointers06OpaqueF0VyKF">validPointer()</a>
</code>
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<p>Provides a non-optional <code>OpaquePointer</code> if one exists for this class.</p>
<div class="aside aside-throws">
<p class="aside-title">Throws</p>
<p><code>Pointer.pointerConsumed</code> if the raw pointer wrapped by this class is nil</p>
</div>
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<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">validPointer</span><span class="p">()</span> <span class="k">throws</span> <span class="o">-&gt;</span> <span class="kt">OpaquePointer</span></code></pre>
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<h4>Return Value</h4>
<p>the raw <code>OpaquePointer</code> wrapped by this class.</p>
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<code>
<a name="/s:6Mentat18OptionalRustObjectC7cleanupys13OpaquePointerV7pointer_tF"></a>
<a name="//apple_ref/swift/Method/cleanup(pointer:)" class="dashAnchor"></a>
<a class="token" href="#/s:6Mentat18OptionalRustObjectC7cleanupys13OpaquePointerV7pointer_tF">cleanup(pointer:)</a>
</code>
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<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Undocumented</p>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">open</span> <span class="kd">func</span> <span class="nf">cleanup</span><span class="p">(</span><span class="nv">pointer</span><span class="p">:</span> <span class="kt">OpaquePointer</span><span class="p">)</span></code></pre>
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