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 typeT,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 |
T(rv) |
The value of T(rv) is equivalent to the value of rv before the initialization. The new value of |
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
|
(C++11)(C++11)(C++11)
|
checks if a type can be constructed from an rvalue reference (class template) |
|
(C++20)
|
specifies that an object of a type can be move constructed (concept) |
© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/named_req/MoveConstructible