explicit operator bool() const;  |  (since C++14) | 
Checks whether *this owns a locked mutex or not. Effectively calls owns_lock().
Parameters
(none).
Return value
true if *this has an associated mutex and has acquired shared ownership of it, false otherwise.
Exceptions
noexcept specification: noexceptSee also
|  tests whether the lock owns its associated mutex  (public member function)  |  
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