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<article class="main-content">
<section class="section">
<div class="section-content">
<h1>Optional</h1>
<div class="declaration">
<div class="language">
<pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">final</span> <span class="kd">class</span> <span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">V</span><span class="o">&gt;</span> <span class="p">:</span> <span class="kt">AttributeProtocol</span> <span class="k">where</span> <span class="kt">V</span> <span class="p">:</span> <span class="kt"><a href="../../Protocols.html#/s:9CoreStore23ImportableAttributeTypeP">ImportableAttributeType</a></span></code></pre>
</div>
</div>
<p>The containing type for optional value properties. Any type that conforms to <code><a href="../../Protocols.html#/s:9CoreStore23ImportableAttributeTypeP">ImportableAttributeType</a></code> are supported.</p>
<pre class="highlight swift"><code><span class="kd">class</span> <span class="kt">Animal</span><span class="p">:</span> <span class="kt">CoreStoreObject</span> <span class="p">{</span>
<span class="k">let</span> <span class="nv">species</span> <span class="o">=</span> <span class="kt">Value</span><span class="o">.</span><span class="kt">Required</span><span class="o">&lt;</span><span class="kt">String</span><span class="o">&gt;</span><span class="p">(</span><span class="s">"species"</span><span class="p">,</span> <span class="nv">initial</span><span class="p">:</span> <span class="s">""</span><span class="p">)</span>
<span class="k">let</span> <span class="nv">nickname</span> <span class="o">=</span> <span class="kt">Value</span><span class="o">.</span><span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">String</span><span class="o">&gt;</span><span class="p">(</span><span class="s">"nickname"</span><span class="p">)</span>
<span class="k">let</span> <span class="nv">color</span> <span class="o">=</span> <span class="kt">Transformable</span><span class="o">.</span><span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">UIColor</span><span class="o">&gt;</span><span class="p">(</span><span class="s">"color"</span><span class="p">)</span>
<span class="p">}</span>
</code></pre>
<div class="aside aside-important">
<p class="aside-title">Important</p>
<code>Value.Optional</code> properties are required to be stored properties. Computed properties will be ignored, including <code>lazy</code> and <code>weak</code> properties.
</div>
</div>
</section>
<section class="section">
<div class="section-content">
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<ul class="item-container">
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<div>
<code>
<a name="/s:9CoreStore14ValueContainerO8OptionalC_7initial11isTransient19versionHashModifier18renamingIdentifier12customGetter0N6Setter18affectedByKeyPathsAEyx_qd__GSS_qd__SgyXASbSSSgyXAAOyXAAnA13PartialObjectVyxGcSgyAR_ANtcSgShySSGyXAtcfc"></a>
<a name="//apple_ref/swift/Method/init(_:initial:isTransient:versionHashModifier:renamingIdentifier:customGetter:customSetter:affectedByKeyPaths:)" class="dashAnchor"></a>
<a class="token" href="#/s:9CoreStore14ValueContainerO8OptionalC_7initial11isTransient19versionHashModifier18renamingIdentifier12customGetter0N6Setter18affectedByKeyPathsAEyx_qd__GSS_qd__SgyXASbSSSgyXAAOyXAAnA13PartialObjectVyxGcSgyAR_ANtcSgShySSGyXAtcfc">init(_:initial:isTransient:versionHashModifier:renamingIdentifier:customGetter:customSetter:affectedByKeyPaths:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Initializes the metadata for the property.</p>
<pre class="highlight swift"><code><span class="kd">class</span> <span class="kt">Person</span><span class="p">:</span> <span class="kt">CoreStoreObject</span> <span class="p">{</span>
<span class="k">let</span> <span class="nv">title</span> <span class="o">=</span> <span class="kt">Value</span><span class="o">.</span><span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">String</span><span class="o">&gt;</span><span class="p">(</span><span class="s">"title"</span><span class="p">,</span> <span class="nv">initial</span><span class="p">:</span> <span class="s">"Mr."</span><span class="p">)</span>
<span class="k">let</span> <span class="nv">name</span> <span class="o">=</span> <span class="kt">Value</span><span class="o">.</span><span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">String</span><span class="o">&gt;</span><span class="p">(</span><span class="s">"name"</span><span class="p">)</span>
<span class="k">let</span> <span class="nv">displayName</span> <span class="o">=</span> <span class="kt">Value</span><span class="o">.</span><span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">String</span><span class="o">&gt;</span><span class="p">(</span>
<span class="s">"displayName"</span><span class="p">,</span>
<span class="nv">isTransient</span><span class="p">:</span> <span class="kc">true</span><span class="p">,</span>
<span class="nv">customGetter</span><span class="p">:</span> <span class="kt">Person</span><span class="o">.</span><span class="nf">getName</span><span class="p">(</span><span class="nv">_</span><span class="p">:)</span>
<span class="p">)</span>
<span class="kd">private</span> <span class="kd">static</span> <span class="kd">func</span> <span class="nf">getName</span><span class="p">(</span><span class="n">_</span> <span class="nv">partialObject</span><span class="p">:</span> <span class="kt">PartialObject</span><span class="o">&lt;</span><span class="kt">Person</span><span class="o">&gt;</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">String</span><span class="p">?</span> <span class="p">{</span>
<span class="k">if</span> <span class="k">let</span> <span class="nv">cachedDisplayName</span> <span class="o">=</span> <span class="n">partialObject</span><span class="o">.</span><span class="nf">primitiveValue</span><span class="p">(</span><span class="nv">for</span><span class="p">:</span> <span class="p">{</span> <span class="nv">$0</span><span class="o">.</span><span class="n">displayName</span> <span class="p">})</span> <span class="p">{</span>
<span class="k">return</span> <span class="n">cachedDisplayName</span>
<span class="p">}</span>
<span class="k">let</span> <span class="nv">title</span> <span class="o">=</span> <span class="n">partialObject</span><span class="o">.</span><span class="nf">value</span><span class="p">(</span><span class="nv">for</span><span class="p">:</span> <span class="p">{</span> <span class="nv">$0</span><span class="o">.</span><span class="n">title</span> <span class="p">})</span>
<span class="k">let</span> <span class="nv">name</span> <span class="o">=</span> <span class="n">partialObject</span><span class="o">.</span><span class="nf">value</span><span class="p">(</span><span class="nv">for</span><span class="p">:</span> <span class="p">{</span> <span class="nv">$0</span><span class="o">.</span><span class="n">name</span> <span class="p">})</span>
<span class="k">let</span> <span class="nv">displayName</span> <span class="o">=</span> <span class="s">"</span><span class="se">\(</span><span class="n">title</span><span class="se">)</span><span class="s"> </span><span class="se">\(</span><span class="n">name</span><span class="se">)</span><span class="s">"</span>
<span class="n">partialObject</span><span class="o">.</span><span class="nf">setPrimitiveValue</span><span class="p">(</span><span class="n">displayName</span><span class="p">,</span> <span class="nv">for</span><span class="p">:</span> <span class="p">{</span> <span class="nv">$0</span><span class="o">.</span><span class="n">displayName</span> <span class="p">})</span>
<span class="k">return</span> <span class="n">displayName</span>
<span class="p">}</span>
<span class="p">}</span>
</code></pre>
</div>
<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="n">_</span> <span class="nv">keyPath</span><span class="p">:</span> <span class="kt"><a href="../../Typealiases.html#/s:9CoreStore13KeyPathStringa">KeyPathString</a></span><span class="p">,</span>
<span class="nv">initial</span><span class="p">:</span> <span class="kd">@autoclosure</span> <span class="kd">@escaping</span> <span class="p">()</span> <span class="o">-&gt;</span> <span class="kt">V</span><span class="p">?</span> <span class="o">=</span> <span class="kc">nil</span><span class="p">,</span>
<span class="nv">isTransient</span><span class="p">:</span> <span class="kt">Bool</span> <span class="o">=</span> <span class="kc">false</span><span class="p">,</span>
<span class="nv">versionHashModifier</span><span class="p">:</span> <span class="kd">@autoclosure</span> <span class="kd">@escaping</span> <span class="p">()</span> <span class="o">-&gt;</span> <span class="kt">String</span><span class="p">?</span> <span class="o">=</span> <span class="kc">nil</span><span class="p">,</span>
<span class="nv">renamingIdentifier</span><span class="p">:</span> <span class="kd">@autoclosure</span> <span class="kd">@escaping</span> <span class="p">()</span> <span class="o">-&gt;</span> <span class="kt">String</span><span class="p">?</span> <span class="o">=</span> <span class="kc">nil</span><span class="p">,</span>
<span class="nv">customGetter</span><span class="p">:</span> <span class="p">((</span><span class="n">_</span> <span class="nv">partialObject</span><span class="p">:</span> <span class="kt"><a href="../../Structs/PartialObject.html">PartialObject</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">V</span><span class="p">?)?</span> <span class="o">=</span> <span class="kc">nil</span><span class="p">,</span>
<span class="nv">customSetter</span><span class="p">:</span> <span class="p">((</span><span class="n">_</span> <span class="nv">partialObject</span><span class="p">:</span> <span class="kt"><a href="../../Structs/PartialObject.html">PartialObject</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;</span><span class="p">,</span> <span class="n">_</span> <span class="nv">newValue</span><span class="p">:</span> <span class="kt">V</span><span class="p">?)</span> <span class="o">-&gt;</span> <span class="kt">Void</span><span class="p">)?</span> <span class="o">=</span> <span class="kc">nil</span><span class="p">,</span>
<span class="nv">affectedByKeyPaths</span><span class="p">:</span> <span class="kd">@autoclosure</span> <span class="kd">@escaping</span> <span class="p">()</span> <span class="o">-&gt;</span> <span class="kt">Set</span><span class="o">&lt;</span><span class="kt">String</span><span class="o">&gt;</span> <span class="o">=</span> <span class="p">[])</span></code></pre>
</div>
</div>
<div>
<h4>Parameters</h4>
<table class="graybox">
<tbody>
<tr>
<td>
<code>
<em>keyPath</em>
</code>
</td>
<td>
<div>
<p>the permanent attribute name for this property.</p>
</div>
</td>
</tr>
<tr>
<td>
<code>
<em>initial</em>
</code>
</td>
<td>
<div>
<p>the initial value for the property when the object is first created. Defaults to <code>nil</code> if not specified.</p>
</div>
</td>
</tr>
<tr>
<td>
<code>
<em>isTransient</em>
</code>
</td>
<td>
<div>
<p><code>true</code> if the property is transient, otherwise <code>false</code>. Defaults to <code>false</code> if not specified. The transient flag specifies whether or not a property&rsquo;s value is ignored when an object is saved to a persistent store. Transient properties are not saved to the persistent store, but are still managed for undo, redo, validation, and so on.</p>
</div>
</td>
</tr>
<tr>
<td>
<code>
<em>versionHashModifier</em>
</code>
</td>
<td>
<div>
<p>used to mark or denote a property as being a different <q>version</q> than another even if all of the values which affect persistence are equal. (Such a difference is important in cases where the properties are unchanged but the format or content of its data are changed.)</p>
</div>
</td>
</tr>
<tr>
<td>
<code>
<em>renamingIdentifier</em>
</code>
</td>
<td>
<div>
<p>used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property and a destination entity property that share the same identifier indicate that a property mapping should be configured to migrate from the source to the destination. If unset, the identifier will be the property&rsquo;s name.</p>
</div>
</td>
</tr>
<tr>
<td>
<code>
<em>customGetter</em>
</code>
</td>
<td>
<div>
<p>use this closure to make final transformations to the property&rsquo;s value before returning from the getter.</p>
</div>
</td>
</tr>
<tr>
<td>
<code>
<em>self</em>
</code>
</td>
<td>
<div>
<p>the <code><a href="../../Classes/CoreStoreObject.html">CoreStoreObject</a></code></p>
</div>
</td>
</tr>
<tr>
<td>
<code>
<em>getValue</em>
</code>
</td>
<td>
<div>
<p>the original getter for the property</p>
</div>
</td>
</tr>
<tr>
<td>
<code>
<em>customSetter</em>
</code>
</td>
<td>
<div>
<p>use this closure to make final transformations to the new value before assigning to the property.</p>
</div>
</td>
</tr>
<tr>
<td>
<code>
<em>setValue</em>
</code>
</td>
<td>
<div>
<p>the original setter for the property</p>
</div>
</td>
</tr>
<tr>
<td>
<code>
<em>finalNewValue</em>
</code>
</td>
<td>
<div>
<p>the transformed new value</p>
</div>
</td>
</tr>
<tr>
<td>
<code>
<em>originalNewValue</em>
</code>
</td>
<td>
<div>
<p>the original new value</p>
</div>
</td>
</tr>
<tr>
<td>
<code>
<em>affectedByKeyPaths</em>
</code>
</td>
<td>
<div>
<p>a set of key paths for properties whose values affect the value of the receiver. This is similar to <code>NSManagedObject.keyPathsForValuesAffectingValue(forKey:)</code>.</p>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:9CoreStore14ValueContainerO8OptionalC5valueqd__Sgvp"></a>
<a name="//apple_ref/swift/Property/value" class="dashAnchor"></a>
<a class="token" href="#/s:9CoreStore14ValueContainerO8OptionalC5valueqd__Sgvp">value</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>The property value.</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">public</span> <span class="k">var</span> <span class="nv">value</span><span class="p">:</span> <span class="kt">V</span><span class="p">?</span> <span class="p">{</span> <span class="k">get</span> <span class="k">set</span> <span class="p">}</span></code></pre>
</div>
</div>
</section>
</div>
</li>
</ul>
</div>
<div class="task-group">
<div class="task-name-container">
<a name="/ValueContainer.Optional"></a>
<a name="//apple_ref/swift/Section/ValueContainer.Optional" class="dashAnchor"></a>
<a href="#/ValueContainer.Optional">
<h3 class="section-name">ValueContainer.Optional</h3>
</a>
</div>
<ul class="item-container">
<li class="item">
<div>
<code>
<a name="/s:9CoreStore14ValueContainerO8OptionalC7observe7options13changeHandlerAA0ab9ObjectKeyC11Observation_pSo05NSKeyC16ObservingOptionsV_yx_AA0abjC4DiffCyqd__GtctF"></a>
<a name="//apple_ref/swift/Method/observe(options:changeHandler:)" class="dashAnchor"></a>
<a class="token" href="#/s:9CoreStore14ValueContainerO8OptionalC7observe7options13changeHandlerAA0ab9ObjectKeyC11Observation_pSo05NSKeyC16ObservingOptionsV_yx_AA0abjC4DiffCyqd__GtctF">observe(options:changeHandler:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Observes changes in the receiver value. When the returned <code><a href="../../Protocols/CoreStoreObjectKeyValueObservation.html">CoreStoreObjectKeyValueObservation</a></code> is deinited or invalidated, it will stop observing.</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">public</span> <span class="kd">func</span> <span class="nf">observe</span><span class="p">(</span><span class="nv">options</span><span class="p">:</span> <span class="kt">NSKeyValueObservingOptions</span> <span class="o">=</span> <span class="p">[],</span> <span class="nv">changeHandler</span><span class="p">:</span> <span class="kd">@escaping</span> <span class="p">(</span><span class="kt">O</span><span class="p">,</span> <span class="kt"><a href="../../Classes/CoreStoreObjectValueDiff.html">CoreStoreObjectValueDiff</a></span><span class="o">&lt;</span><span class="kt">V</span><span class="o">&gt;</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">Void</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt"><a href="../../Protocols/CoreStoreObjectKeyValueObservation.html">CoreStoreObjectKeyValueObservation</a></span></code></pre>
</div>
</div>
<div>
<h4>Parameters</h4>
<table class="graybox">
<tbody>
<tr>
<td>
<code>
<em>options</em>
</code>
</td>
<td>
<div>
<p>The flags indicating which values to include in the change dictionary.</p>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
</div>
</li>
</ul>
</div>
<div class="task-group">
<div class="task-name-container">
<a name="/ValueContainer.Optional2"></a>
<a name="//apple_ref/swift/Section/ValueContainer.Optional" class="dashAnchor"></a>
<a href="#/ValueContainer.Optional2">
<h3 class="section-name">ValueContainer.Optional</h3>
</a>
</div>
<ul class="item-container">
<li class="item">
<div>
<code>
<a name="/s:9CoreStore14ValueContainerO8OptionalC2eeoiyAA5WhereVyxGAEyx_qd__G_qd__SgtFZ"></a>
<a name="//apple_ref/swift/Method/==(_:_:)" class="dashAnchor"></a>
<a class="token" href="#/s:9CoreStore14ValueContainerO8OptionalC2eeoiyAA5WhereVyxGAEyx_qd__G_qd__SgtFZ">==(_:_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Creates a <code><a href="../../Structs/Where.html">Where</a></code> clause by comparing if a property is equal to a value</p>
<pre class="highlight swift"><code><span class="k">let</span> <span class="nv">person</span> <span class="o">=</span> <span class="kt">CoreStore</span><span class="o">.</span><span class="nf">fetchOne</span><span class="p">(</span><span class="kt">From</span><span class="o">&lt;</span><span class="kt">Person</span><span class="o">&gt;</span><span class="p">()</span><span class="o">.</span><span class="nf">where</span><span class="p">({</span> <span class="nv">$0</span><span class="o">.</span><span class="n">nickname</span> <span class="o">==</span> <span class="s">"John"</span> <span class="p">}))</span>
</code></pre>
</div>
<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">static</span> <span class="kd">func</span> <span class="o">==</span> <span class="p">(</span><span class="nv">attribute</span><span class="p">:</span> <span class="kt"><a href="../../Enums/ValueContainer.html">ValueContainer</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;.</span><span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">V</span><span class="o">&gt;</span><span class="p">,</span> <span class="nv">value</span><span class="p">:</span> <span class="kt">V</span><span class="p">?)</span> <span class="o">-&gt;</span> <span class="kt"><a href="../../Structs/Where.html">Where</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:9CoreStore14ValueContainerO8OptionalC2neoiyAA5WhereVyxGAEyx_qd__G_qd__SgtFZ"></a>
<a name="//apple_ref/swift/Method/!=(_:_:)" class="dashAnchor"></a>
<a class="token" href="#/s:9CoreStore14ValueContainerO8OptionalC2neoiyAA5WhereVyxGAEyx_qd__G_qd__SgtFZ">!=(_:_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Creates a <code><a href="../../Structs/Where.html">Where</a></code> clause by comparing if a property is not equal to a value</p>
<pre class="highlight swift"><code><span class="k">let</span> <span class="nv">person</span> <span class="o">=</span> <span class="kt">CoreStore</span><span class="o">.</span><span class="nf">fetchOne</span><span class="p">(</span><span class="kt">From</span><span class="o">&lt;</span><span class="kt">Person</span><span class="o">&gt;</span><span class="p">()</span><span class="o">.</span><span class="nf">where</span><span class="p">({</span> <span class="nv">$0</span><span class="o">.</span><span class="n">nickname</span> <span class="o">!=</span> <span class="s">"John"</span> <span class="p">}))</span>
</code></pre>
</div>
<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">static</span> <span class="kd">func</span> <span class="o">!=</span> <span class="p">(</span><span class="nv">attribute</span><span class="p">:</span> <span class="kt"><a href="../../Enums/ValueContainer.html">ValueContainer</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;.</span><span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">V</span><span class="o">&gt;</span><span class="p">,</span> <span class="nv">value</span><span class="p">:</span> <span class="kt">V</span><span class="p">?)</span> <span class="o">-&gt;</span> <span class="kt"><a href="../../Structs/Where.html">Where</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:9CoreStore14ValueContainerO8OptionalC1loiyAA5WhereVyxGAEyx_qd__G_qd__SgtFZ"></a>
<a name="//apple_ref/swift/Method/&lt;(_:_:)" class="dashAnchor"></a>
<a class="token" href="#/s:9CoreStore14ValueContainerO8OptionalC1loiyAA5WhereVyxGAEyx_qd__G_qd__SgtFZ">&lt;(_:_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Creates a <code><a href="../../Structs/Where.html">Where</a></code> clause by comparing if a property is less than a value</p>
<pre class="highlight swift"><code><span class="k">let</span> <span class="nv">person</span> <span class="o">=</span> <span class="kt">CoreStore</span><span class="o">.</span><span class="nf">fetchOne</span><span class="p">(</span><span class="kt">From</span><span class="o">&lt;</span><span class="kt">Person</span><span class="o">&gt;</span><span class="p">()</span><span class="o">.</span><span class="nf">where</span><span class="p">({</span> <span class="nv">$0</span><span class="o">.</span><span class="n">age</span> <span class="o">&lt;</span> <span class="mi">20</span> <span class="p">}))</span>
</code></pre>
</div>
<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">static</span> <span class="kd">func</span> <span class="o">&lt;</span> <span class="p">(</span><span class="nv">attribute</span><span class="p">:</span> <span class="kt"><a href="../../Enums/ValueContainer.html">ValueContainer</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;.</span><span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">V</span><span class="o">&gt;</span><span class="p">,</span> <span class="nv">value</span><span class="p">:</span> <span class="kt">V</span><span class="p">?)</span> <span class="o">-&gt;</span> <span class="kt"><a href="../../Structs/Where.html">Where</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:9CoreStore14ValueContainerO8OptionalC1goiyAA5WhereVyxGAEyx_qd__G_qd__SgtFZ"></a>
<a name="//apple_ref/swift/Method/&gt;(_:_:)" class="dashAnchor"></a>
<a class="token" href="#/s:9CoreStore14ValueContainerO8OptionalC1goiyAA5WhereVyxGAEyx_qd__G_qd__SgtFZ">&gt;(_:_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Creates a <code><a href="../../Structs/Where.html">Where</a></code> clause by comparing if a property is greater than a value</p>
<pre class="highlight swift"><code><span class="k">let</span> <span class="nv">person</span> <span class="o">=</span> <span class="kt">CoreStore</span><span class="o">.</span><span class="nf">fetchOne</span><span class="p">(</span><span class="kt">From</span><span class="o">&lt;</span><span class="kt">Person</span><span class="o">&gt;</span><span class="p">()</span><span class="o">.</span><span class="nf">where</span><span class="p">({</span> <span class="nv">$0</span><span class="o">.</span><span class="n">age</span> <span class="o">&gt;</span> <span class="mi">20</span> <span class="p">}))</span>
</code></pre>
</div>
<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">static</span> <span class="kd">func</span> <span class="o">&gt;</span> <span class="p">(</span><span class="nv">attribute</span><span class="p">:</span> <span class="kt"><a href="../../Enums/ValueContainer.html">ValueContainer</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;.</span><span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">V</span><span class="o">&gt;</span><span class="p">,</span> <span class="nv">value</span><span class="p">:</span> <span class="kt">V</span><span class="p">?)</span> <span class="o">-&gt;</span> <span class="kt"><a href="../../Structs/Where.html">Where</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:9CoreStore14ValueContainerO8OptionalC2leoiyAA5WhereVyxGAEyx_qd__G_qd__SgtFZ"></a>
<a name="//apple_ref/swift/Method/&lt;=(_:_:)" class="dashAnchor"></a>
<a class="token" href="#/s:9CoreStore14ValueContainerO8OptionalC2leoiyAA5WhereVyxGAEyx_qd__G_qd__SgtFZ">&lt;=(_:_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Creates a <code><a href="../../Structs/Where.html">Where</a></code> clause by comparing if a property is less than or equal to a value</p>
<pre class="highlight swift"><code><span class="k">let</span> <span class="nv">person</span> <span class="o">=</span> <span class="kt">CoreStore</span><span class="o">.</span><span class="nf">fetchOne</span><span class="p">(</span><span class="kt">From</span><span class="o">&lt;</span><span class="kt">Person</span><span class="o">&gt;</span><span class="p">()</span><span class="o">.</span><span class="nf">where</span><span class="p">({</span> <span class="nv">$0</span><span class="o">.</span><span class="n">age</span> <span class="o">&lt;=</span> <span class="mi">20</span> <span class="p">}))</span>
</code></pre>
</div>
<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">static</span> <span class="kd">func</span> <span class="o">&lt;=</span> <span class="p">(</span><span class="nv">attribute</span><span class="p">:</span> <span class="kt"><a href="../../Enums/ValueContainer.html">ValueContainer</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;.</span><span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">V</span><span class="o">&gt;</span><span class="p">,</span> <span class="nv">value</span><span class="p">:</span> <span class="kt">V</span><span class="p">?)</span> <span class="o">-&gt;</span> <span class="kt"><a href="../../Structs/Where.html">Where</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:9CoreStore14ValueContainerO8OptionalC2geoiyAA5WhereVyxGAEyx_qd__G_qd__SgtFZ"></a>
<a name="//apple_ref/swift/Method/&gt;=(_:_:)" class="dashAnchor"></a>
<a class="token" href="#/s:9CoreStore14ValueContainerO8OptionalC2geoiyAA5WhereVyxGAEyx_qd__G_qd__SgtFZ">&gt;=(_:_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Creates a <code><a href="../../Structs/Where.html">Where</a></code> clause by comparing if a property is greater than or equal to a value</p>
<pre class="highlight swift"><code><span class="k">let</span> <span class="nv">person</span> <span class="o">=</span> <span class="kt">CoreStore</span><span class="o">.</span><span class="nf">fetchOne</span><span class="p">(</span><span class="kt">From</span><span class="o">&lt;</span><span class="kt">Person</span><span class="o">&gt;</span><span class="p">()</span><span class="o">.</span><span class="nf">where</span><span class="p">({</span> <span class="nv">$0</span><span class="o">.</span><span class="n">age</span> <span class="o">&gt;=</span> <span class="mi">20</span> <span class="p">}))</span>
</code></pre>
</div>
<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">static</span> <span class="kd">func</span> <span class="o">&gt;=</span> <span class="p">(</span><span class="nv">attribute</span><span class="p">:</span> <span class="kt"><a href="../../Enums/ValueContainer.html">ValueContainer</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;.</span><span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">V</span><span class="o">&gt;</span><span class="p">,</span> <span class="nv">value</span><span class="p">:</span> <span class="kt">V</span><span class="p">?)</span> <span class="o">-&gt;</span> <span class="kt"><a href="../../Structs/Where.html">Where</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:9CoreStore14ValueContainerO8OptionalC2teoiyAA5WhereVyxGqd0___AEyx_qd__Gt7ElementQyd0__Rsd__STRd0__lFZ"></a>
<a name="//apple_ref/swift/Method/~=(_:_:)" class="dashAnchor"></a>
<a class="token" href="#/s:9CoreStore14ValueContainerO8OptionalC2teoiyAA5WhereVyxGqd0___AEyx_qd__Gt7ElementQyd0__Rsd__STRd0__lFZ">~=(_:_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Creates a <code><a href="../../Structs/Where.html">Where</a></code> clause by checking if a sequence contains the value of a property</p>
<pre class="highlight swift"><code><span class="k">let</span> <span class="nv">dog</span> <span class="o">=</span> <span class="kt">CoreStore</span><span class="o">.</span><span class="nf">fetchOne</span><span class="p">(</span><span class="kt">From</span><span class="o">&lt;</span><span class="kt">Dog</span><span class="o">&gt;</span><span class="p">()</span><span class="o">.</span><span class="nf">where</span><span class="p">({</span> <span class="p">[</span><span class="s">"Pluto"</span><span class="p">,</span> <span class="s">"Snoopy"</span><span class="p">,</span> <span class="s">"Scooby"</span><span class="p">]</span> <span class="o">~=</span> <span class="nv">$0</span><span class="o">.</span><span class="n">nickname</span> <span class="p">}))</span>
</code></pre>
</div>
<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">static</span> <span class="kd">func</span> <span class="o">~=</span> <span class="o">&lt;</span><span class="kt">S</span><span class="o">&gt;</span><span class="p">(</span><span class="nv">sequence</span><span class="p">:</span> <span class="kt">S</span><span class="p">,</span> <span class="nv">attribute</span><span class="p">:</span> <span class="kt"><a href="../../Enums/ValueContainer.html">ValueContainer</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;.</span><span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">V</span><span class="o">&gt;</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt"><a href="../../Structs/Where.html">Where</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;</span> <span class="k">where</span> <span class="kt">V</span> <span class="o">==</span> <span class="kt">S</span><span class="o">.</span><span class="kt">Element</span><span class="p">,</span> <span class="kt">S</span> <span class="p">:</span> <span class="kt">Sequence</span></code></pre>
</div>
</div>
</section>
</div>
</li>
</ul>
</div>
<div class="task-group">
<div class="task-name-container">
<a name="/ValueContainer.Optional:%20DynamicKeyPath"></a>
<a name="//apple_ref/swift/Section/ValueContainer.Optional: DynamicKeyPath" class="dashAnchor"></a>
<a href="#/ValueContainer.Optional:%20DynamicKeyPath">
<h3 class="section-name">ValueContainer.Optional: DynamicKeyPath</h3>
</a>
</div>
<ul class="item-container">
<li class="item">
<div>
<code>
<a name="/s:9CoreStore14DynamicKeyPathP10ObjectTypeQa"></a>
<a name="//apple_ref/swift/Alias/ObjectType" class="dashAnchor"></a>
<a class="token" href="#/s:9CoreStore14DynamicKeyPathP10ObjectTypeQa">ObjectType</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
</div>
<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">typealias</span> <span class="kt">ObjectType</span> <span class="o">=</span> <span class="kt">O</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:9CoreStore14DynamicKeyPathP9ValueTypeQa"></a>
<a name="//apple_ref/swift/Alias/ValueType" class="dashAnchor"></a>
<a class="token" href="#/s:9CoreStore14DynamicKeyPathP9ValueTypeQa">ValueType</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
</div>
<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">typealias</span> <span class="kt">ValueType</span> <span class="o">=</span> <span class="kt">V</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:9CoreStore17AnyDynamicKeyPathP06cs_keyF6StringSSvp"></a>
<a name="//apple_ref/swift/Property/cs_keyPathString" class="dashAnchor"></a>
<a class="token" href="#/s:9CoreStore17AnyDynamicKeyPathP06cs_keyF6StringSSvp">cs_keyPathString</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
</div>
<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="k">var</span> <span class="nv">cs_keyPathString</span><span class="p">:</span> <span class="kt">String</span> <span class="p">{</span> <span class="k">get</span> <span class="p">}</span></code></pre>
</div>
</div>
</section>
</div>
</li>
</ul>
</div>
<div class="task-group">
<div class="task-name-container">
<a name="/Operations"></a>
<a name="//apple_ref/swift/Section/Operations" class="dashAnchor"></a>
<a href="#/Operations">
<h3 class="section-name">Operations</h3>
</a>
</div>
<ul class="item-container">
<li class="item">
<div>
<code>
<a name="/s:9CoreStore14ValueContainerO8OptionalC2zeoiyyAEyx_qd__G_qd__SgtFZ"></a>
<a name="//apple_ref/swift/Method/.=(_:_:)" class="dashAnchor"></a>
<a class="token" href="#/s:9CoreStore14ValueContainerO8OptionalC2zeoiyyAEyx_qd__G_qd__SgtFZ">.=(_:_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Assigns an optional value to the property. The operation</p>
<pre class="highlight swift"><code><span class="n">animal</span><span class="o">.</span><span class="n">nickname</span> <span class="o">.=</span> <span class="s">"Taylor"</span>
</code></pre>
<p>is equivalent to</p>
<pre class="highlight swift"><code><span class="n">animal</span><span class="o">.</span><span class="n">nickname</span><span class="o">.</span><span class="n">value</span> <span class="o">=</span> <span class="s">"Taylor"</span>
</code></pre>
</div>
<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">static</span> <span class="kd">func</span> <span class="o">.=</span> <span class="p">(</span><span class="nv">property</span><span class="p">:</span> <span class="kt"><a href="../../Enums/ValueContainer.html">ValueContainer</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;.</span><span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">V</span><span class="o">&gt;</span><span class="p">,</span> <span class="nv">newValue</span><span class="p">:</span> <span class="kt">V</span><span class="p">?)</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:9CoreStore14ValueContainerO8OptionalC2zeoiyyAEyx_qd__G_AEyqd0___qd__GtAA0aB6ObjectCRbd0__lFZ"></a>
<a name="//apple_ref/swift/Method/.=(_:_:)" class="dashAnchor"></a>
<a class="token" href="#/s:9CoreStore14ValueContainerO8OptionalC2zeoiyyAEyx_qd__G_AEyqd0___qd__GtAA0aB6ObjectCRbd0__lFZ">.=(_:_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Assigns an optional value from another property. The operation</p>
<pre class="highlight swift"><code><span class="n">animal</span><span class="o">.</span><span class="n">nickname</span> <span class="o">.=</span> <span class="n">anotherAnimal</span><span class="o">.</span><span class="n">nickname</span>
</code></pre>
<p>is equivalent to</p>
<pre class="highlight swift"><code><span class="n">animal</span><span class="o">.</span><span class="n">nickname</span><span class="o">.</span><span class="n">value</span> <span class="o">=</span> <span class="n">anotherAnimal</span><span class="o">.</span><span class="n">nickname</span><span class="o">.</span><span class="n">value</span>
</code></pre>
</div>
<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">static</span> <span class="kd">func</span> <span class="o">.=</span> <span class="o">&lt;</span><span class="kt">O2</span><span class="o">&gt;</span><span class="p">(</span><span class="nv">property</span><span class="p">:</span> <span class="kt"><a href="../../Enums/ValueContainer.html">ValueContainer</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;.</span><span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">V</span><span class="o">&gt;</span><span class="p">,</span> <span class="nv">property2</span><span class="p">:</span> <span class="kt"><a href="../../Enums/ValueContainer.html">ValueContainer</a></span><span class="o">&lt;</span><span class="kt">O2</span><span class="o">&gt;.</span><span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">V</span><span class="o">&gt;</span><span class="p">)</span> <span class="k">where</span> <span class="kt">O2</span> <span class="p">:</span> <span class="kt"><a href="../../Classes/CoreStoreObject.html">CoreStoreObject</a></span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:9CoreStore14ValueContainerO8OptionalC2zeoiyyAEyx_qd__G_AC8RequiredCyqd0___qd__GtAA0aB6ObjectCRbd0__lFZ"></a>
<a name="//apple_ref/swift/Method/.=(_:_:)" class="dashAnchor"></a>
<a class="token" href="#/s:9CoreStore14ValueContainerO8OptionalC2zeoiyyAEyx_qd__G_AC8RequiredCyqd0___qd__GtAA0aB6ObjectCRbd0__lFZ">.=(_:_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Assigns a value from another property. The operation</p>
<pre class="highlight swift"><code><span class="n">animal</span><span class="o">.</span><span class="n">nickname</span> <span class="o">.=</span> <span class="n">anotherAnimal</span><span class="o">.</span><span class="n">species</span>
</code></pre>
<p>is equivalent to</p>
<pre class="highlight swift"><code><span class="n">animal</span><span class="o">.</span><span class="n">nickname</span><span class="o">.</span><span class="n">value</span> <span class="o">=</span> <span class="n">anotherAnimal</span><span class="o">.</span><span class="n">species</span><span class="o">.</span><span class="n">value</span>
</code></pre>
</div>
<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">static</span> <span class="kd">func</span> <span class="o">.=</span> <span class="o">&lt;</span><span class="kt">O2</span><span class="o">&gt;</span><span class="p">(</span><span class="nv">property</span><span class="p">:</span> <span class="kt"><a href="../../Enums/ValueContainer.html">ValueContainer</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;.</span><span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">V</span><span class="o">&gt;</span><span class="p">,</span> <span class="nv">property2</span><span class="p">:</span> <span class="kt"><a href="../../Enums/ValueContainer.html">ValueContainer</a></span><span class="o">&lt;</span><span class="kt">O2</span><span class="o">&gt;.</span><span class="kt"><a href="../../Enums/ValueContainer/Required.html">Required</a></span><span class="o">&lt;</span><span class="kt">V</span><span class="o">&gt;</span><span class="p">)</span> <span class="k">where</span> <span class="kt">O2</span> <span class="p">:</span> <span class="kt"><a href="../../Classes/CoreStoreObject.html">CoreStoreObject</a></span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:9CoreStore14ValueContainerO8OptionalC3zeeoiySbAEyx_qd__G_qd__SgtFZ"></a>
<a name="//apple_ref/swift/Method/.==(_:_:)" class="dashAnchor"></a>
<a class="token" href="#/s:9CoreStore14ValueContainerO8OptionalC3zeeoiySbAEyx_qd__G_qd__SgtFZ">.==(_:_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Compares equality between a property&rsquo;s value and another value</p>
<pre class="highlight swift"><code><span class="k">if</span> <span class="n">animal</span><span class="o">.</span><span class="n">species</span> <span class="o">.==</span> <span class="s">"Swift"</span> <span class="p">{</span> <span class="o">...</span> <span class="p">}</span>
</code></pre>
<p>is equivalent to</p>
<pre class="highlight swift"><code><span class="k">if</span> <span class="n">animal</span><span class="o">.</span><span class="n">species</span><span class="o">.</span><span class="n">value</span> <span class="o">==</span> <span class="s">"Swift"</span> <span class="p">{</span> <span class="o">...</span> <span class="p">}</span>
</code></pre>
</div>
<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">static</span> <span class="kd">func</span> <span class="o">.==</span> <span class="p">(</span><span class="nv">property</span><span class="p">:</span> <span class="kt"><a href="../../Enums/ValueContainer.html">ValueContainer</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;.</span><span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">V</span><span class="o">&gt;</span><span class="p">,</span> <span class="nv">value</span><span class="p">:</span> <span class="kt">V</span><span class="p">?)</span> <span class="o">-&gt;</span> <span class="kt">Bool</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:9CoreStore14ValueContainerO8OptionalC3zeeoiySbqd__Sg_AEyx_qd__GtFZ"></a>
<a name="//apple_ref/swift/Method/.==(_:_:)" class="dashAnchor"></a>
<a class="token" href="#/s:9CoreStore14ValueContainerO8OptionalC3zeeoiySbqd__Sg_AEyx_qd__GtFZ">.==(_:_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Compares equality between a property&rsquo;s value and another property&rsquo;s value</p>
<pre class="highlight swift"><code><span class="k">if</span> <span class="s">"Swift"</span> <span class="o">.==</span> <span class="n">animal</span><span class="o">.</span><span class="n">species</span> <span class="p">{</span> <span class="o">...</span> <span class="p">}</span>
</code></pre>
<p>is equivalent to</p>
<pre class="highlight swift"><code><span class="k">if</span> <span class="s">"Swift"</span> <span class="o">==</span> <span class="n">animal</span><span class="o">.</span><span class="n">species</span><span class="o">.</span><span class="n">value</span> <span class="p">{</span> <span class="o">...</span> <span class="p">}</span>
</code></pre>
</div>
<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">static</span> <span class="kd">func</span> <span class="o">.==</span> <span class="p">(</span><span class="nv">value</span><span class="p">:</span> <span class="kt">V</span><span class="p">?,</span> <span class="nv">property</span><span class="p">:</span> <span class="kt"><a href="../../Enums/ValueContainer.html">ValueContainer</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;.</span><span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">V</span><span class="o">&gt;</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">Bool</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:9CoreStore14ValueContainerO8OptionalC3zeeoiySbAEyx_qd__G_AGtFZ"></a>
<a name="//apple_ref/swift/Method/.==(_:_:)" class="dashAnchor"></a>
<a class="token" href="#/s:9CoreStore14ValueContainerO8OptionalC3zeeoiySbAEyx_qd__G_AGtFZ">.==(_:_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Compares equality between a property&rsquo;s value and another property&rsquo;s value</p>
<pre class="highlight swift"><code><span class="k">if</span> <span class="n">animal</span><span class="o">.</span><span class="n">species</span> <span class="o">.==</span> <span class="n">anotherAnimal</span><span class="o">.</span><span class="n">species</span> <span class="p">{</span> <span class="o">...</span> <span class="p">}</span>
</code></pre>
<p>is equivalent to</p>
<pre class="highlight swift"><code><span class="k">if</span> <span class="n">animal</span><span class="o">.</span><span class="n">species</span><span class="o">.</span><span class="n">value</span> <span class="o">==</span> <span class="n">anotherAnimal</span><span class="o">.</span><span class="n">species</span><span class="o">.</span><span class="n">value</span> <span class="p">{</span> <span class="o">...</span> <span class="p">}</span>
</code></pre>
</div>
<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">static</span> <span class="kd">func</span> <span class="o">.==</span> <span class="p">(</span><span class="nv">property</span><span class="p">:</span> <span class="kt"><a href="../../Enums/ValueContainer.html">ValueContainer</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;.</span><span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">V</span><span class="o">&gt;</span><span class="p">,</span> <span class="nv">property2</span><span class="p">:</span> <span class="kt"><a href="../../Enums/ValueContainer.html">ValueContainer</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;.</span><span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">V</span><span class="o">&gt;</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">Bool</span></code></pre>
</div>
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</section>
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</li>
<li class="item">
<div>
<code>
<a name="/s:9CoreStore14ValueContainerO8OptionalC3zeeoiySbAEyx_qd__G_AC8RequiredCyx_qd__GtFZ"></a>
<a name="//apple_ref/swift/Method/.==(_:_:)" class="dashAnchor"></a>
<a class="token" href="#/s:9CoreStore14ValueContainerO8OptionalC3zeeoiySbAEyx_qd__G_AC8RequiredCyx_qd__GtFZ">.==(_:_:)</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Compares equality between a property&rsquo;s value and another property&rsquo;s value</p>
<pre class="highlight swift"><code><span class="k">if</span> <span class="n">animal</span><span class="o">.</span><span class="n">species</span> <span class="o">.==</span> <span class="n">anotherAnimal</span><span class="o">.</span><span class="n">species</span> <span class="p">{</span> <span class="o">...</span> <span class="p">}</span>
</code></pre>
<p>is equivalent to</p>
<pre class="highlight swift"><code><span class="k">if</span> <span class="n">animal</span><span class="o">.</span><span class="n">species</span><span class="o">.</span><span class="n">value</span> <span class="o">==</span> <span class="n">anotherAnimal</span><span class="o">.</span><span class="n">species</span><span class="o">.</span><span class="n">value</span> <span class="p">{</span> <span class="o">...</span> <span class="p">}</span>
</code></pre>
</div>
<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">static</span> <span class="kd">func</span> <span class="o">.==</span> <span class="p">(</span><span class="nv">property</span><span class="p">:</span> <span class="kt"><a href="../../Enums/ValueContainer.html">ValueContainer</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;.</span><span class="kt">Optional</span><span class="o">&lt;</span><span class="kt">V</span><span class="o">&gt;</span><span class="p">,</span> <span class="nv">property2</span><span class="p">:</span> <span class="kt"><a href="../../Enums/ValueContainer.html">ValueContainer</a></span><span class="o">&lt;</span><span class="kt">O</span><span class="o">&gt;.</span><span class="kt"><a href="../../Enums/ValueContainer/Required.html">Required</a></span><span class="o">&lt;</span><span class="kt">V</span><span class="o">&gt;</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">Bool</span></code></pre>
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