std::unique_lock<Mutex>::operator=

unique_lock& operator= ( unique_lock&& other ) ;		(since C++11)

Move assignment operator. Replaces the contents with those of other using move semantics.

If prior to the call *this has an associated mutex and has acquired ownership of it, the mutex is unlocked.

Parameters

other

-

another unique_lock to replace the state with

Return value

*this

Exceptions

Throws nothing.

Notes

With a recursive mutex it is possible for both *this and other to own the same mutex before the assignment. In this case, *this will own the mutex after the assignment and other

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR	Applied to	Behavior as published	Correct behavior
LWG 2104	C++11	the move assignment operator was noexcept, but it may throw an exception in the case of undefined behavior[1]	it is not noexcept

1. ↑ For example, *this is constructed with std::adopt_lock, but the calling thread does not have the ownership of the associated mutex. In this case, *this