C++ named requirements: MoveConstructible (since C++11)

Specifies that an instance of the type can be constructed from an rvalue argument.

Requirements

The type T satisfies MoveConstructible if.

Given.

• rv, an rvalue expression of type T
• u, an arbitrary identifier

The following expressions must be valid and have their specified effects.

Expression	Post-conditions
T u = rv;	The value of u is equivalent to the value of rv before the initialization. The new value of rv is unspecified.
T(rv)	The value of T(rv) is equivalent to the value of rv before the initialization. The new value of rv is unspecified.

Notes

A class does not have to implement a move constructor to satisfy this type requirement: a copy constructor that takes a const T& argument can bind rvalue expressions.

If a MoveConstructible class implements a move constructor, it may also implement move semantics to take advantage of the fact that the value of rv after construction is unspecified.

See also

is_move_constructibleis_trivially_move_constructibleis_nothrow_move_constructible (C++11)(C++11)(C++11)	checks if a type can be constructed from an rvalue reference (class template)
move_constructible (C++20)	specifies that an object of a type can be move constructed (concept)