cpp/named req/MoveConstructible

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

Requirements

The type T satisfies 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 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

Vorlage:cpp/concepts/dsc move constructible

is_move_constructible is_trivially_move_constructible is_nothrow_move_constructible (C++11) (C++11) (C++11)	prüft, ob ein Typ hat einen Umzug Konstruktor Original: checks if a type has a move constructor The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Klassen-Template)