[#StdMutex-operator_not]
= xref:StdMutex.adoc[StdMutex]::operator!
:relfileprefix: ../
:mrdocs:

Expose the mutex as a negative capability for Clang Thread Safety Analysis.

== Synopsis

Declared in `<util/stdmutex.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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xref:StdMutex.adoc[StdMutex] const&
operator!() const;
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== Description

A negative requirement uses the EXCLUSIVE_LOCKS_REQUIRED attribute together with the ! operator to indicate that a mutex should not be held.

== Return Value

A const reference to this mutex.


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