How is the move function used in C++?

In C++11, move semantics were introduced, allowing the transfer of ownership of an object’s resources from one object to another using the move function to avoid unnecessary copying of resources.

Usage of the move function is as follows:

#include <utility>

T t1;
T t2 = std::move(t1);

Using the std::move() function allows the ownership of t1’s resources to be transferred to t2, with t1 no longer having ownership of the resources. This is very useful when implementing move constructors and move assignment operators, as it can avoid unnecessary copy overhead and improve program performance.

It is important to note that the move function does not actually move the object’s resources, but simply transfers ownership of the resources, the original object is not emptied or destroyed.

Exercise caution when using the move function to ensure that the target object no longer needs the resources of the original object.