C++ copy constructor

final (C++11) [edit] A move constructor of class T is a non-template constructor whose first parameter is T&& , const T&&, volatile T&&, or const volatile T&&, and either there are no other parameters, or the rest of the parameters all have default values.

Move constructor moves the resources in the heap , i.e., unlike copy constructors which copy the data of the existing object and assigning it to the new object move constructor just makes the pointer of the declared object to point to the data of temporary object and nulls out the pointer of the temporary objects.1 Eyl 2021

A move constructor allows the resources owned by an rvalue object to be moved into an lvalue without creating its copy . An rvalue is an expression that does not have any memory address, and an lvalue is an expression with a memory address.

A move constructor enables the resources owned by an rvalue object to be moved into an lvalue without copying . For more information about move semantics, see Rvalue Reference Declarator: &&. This topic builds upon the following C++ class, MemoryBlock , which manages a memory buffer.