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structfoonathan_1_1memory_1_1is__shar...

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<div class="title">is_shared_allocator&lt; RawAllocator &gt; Struct Template Reference<div class="ingroups"><a class="el" href="group__storage.html">Allocator storage</a></div></div>  </div>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template&lt;class RawAllocator&gt;<br />
struct foonathan::memory::is_shared_allocator&lt; RawAllocator &gt;</h3>

<p>Specifies whether or not a <a href="md_doc_concepts.html#concept_rawallocator">RawAllocator</a> has shared semantics. </p>
<p>It is shared, if - like <a class="el" href="classfoonathan_1_1memory_1_1allocator__reference.html">allocator_reference</a> - if multiple objects refer to the same internal allocator and if it can be copied. This sharing is stateful, however, stateless allocators are not considered shared in the meaning of this traits. <br  />
 If a <code>RawAllocator</code> is shared, it will be directly embedded inside <a class="el" href="classfoonathan_1_1memory_1_1reference__storage.html">reference_storage</a> since it already provides <a class="el" href="classfoonathan_1_1memory_1_1allocator__reference.html">allocator_reference</a> like semantics, so there is no need to add them manually,<br  />
 Specialize it for your own types, if they provide sharing semantics and can be copied. They also must provide an <code>operator==</code> to check whether two allocators refer to the same shared one. </p><dl class="section note"><dt>Note</dt><dd>This makes no guarantees about the lifetime of the shared object, the sharing allocators can either own or refer to a shared object. </dd></dl>
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