NAME¶

std::unique_lock::operator= - std::unique_lock::operator=

Synopsis¶

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.

Defect reports

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

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

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 cannot
properly release the ownership of the associated mutex, and it may result in an
exception to be thrown.