string::operator= (2 of 4 overloads)

Move assignment.

string&
operator=(
    string&& other);

Replace the contents with those of other using move semantics.

If &other == this, do nothing. Otherwise,
If *other.storage() == *this->storage(), ownership of the underlying memory is transferred in constant time, with no possibility of exceptions. After construction, the moved-from string behaves as if newly constructed with its current memory_resource. Otherwise,
a copy of the characters in other is made. In this case, the moved-from container is not changed.

Constant or linear in other.size().

Strong guarantee. Calls to memory_resource::allocate may throw.

*this

Name	Description
`other`	The string to use as a source to move from.