[#bsl-stop_source-2constructor-054]
= xref:bsl.adoc[bsl]::xref:bsl/stop_source.adoc[stop_source]::stop_source
:relfileprefix: ../../
:mrdocs:

Create a `stop_source` that does not refer to a stop state.

== Synopsis

Declared in `<bslstl_stoptoken.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
explicit
stop_source(xref:bsl/nostopstate_t.adoc[nostopstate_t] unused) noexcept;
----

== Description

The resulting object cannot be used to request a stop.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *unused*
| tag selecting the empty `stop_source` constructor
|===


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