std::shared_lock<Mutex>::~shared_lock
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std::shared_lock 
 
 Member functions
shared_lock::~shared_lock
 Shared locking
 Modifiers
 Observers
 Non-member functions
~shared_lock();
 
 (since C++14) 
Destroys the lock.
If *this has an associated mutex ((mutex() returns a non-null pointer) and has acquired ownership of it (owns() returns true), the mutex is unlocked by calling unlock_shared() .