[#BloombergLP-bslstl-StopCallback_NoAlloc]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstl.adoc[bslstl]::StopCallback&lowbar;NoAlloc
:relfileprefix: ../../
:mrdocs:

This component&hyphen;private empty class is used as a dummy &quot;allocator&quot; when `bsl&colon;&colon;stop&lowbar;callback` wraps a non&hyphen;allocator&hyphen;aware type&period;

== Synopsis

Declared in `&lt;bslstl&lowbar;stoptoken&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
class StopCallback&lowbar;NoAlloc;
----

== Friends

[cols="1,4"]
|===
| Name| Description
| `xref:bsl/stop_callback-06.adoc[bsl::stop&lowbar;callback]`
| Callback invoked when a stop is requested on an associated stop state&period;
|===


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