Specifies that an instance of the type can be assigned from an rvalue argument.
The type T satisfies MoveAssignable if.
Given.
t, a modifiable lvalue expression of type T rv, an rvalue expression of type T The following expressions must be valid and have their specified effects.
| Expression | Return type | Return value | Post-conditions |
|---|---|---|---|
t = rv | T& | t | If t and rv do not refer to the same object , the value of t is equivalent to the value of rv before the assignment. The new value of |
The type does not have to implement move assignment operator in order to satisfy this type requirement: a copy assignment operator that takes its parameter by value or as a const Type&, will bind to rvalue argument.
If a MoveAssignable class implements a move assignment operator, it may also implement move semantics to take advantage of the fact that the value of rv after assignment is unspecified.
|
(C++11)(C++11)(C++11) | checks if a type has a move assignment operator (class template) |
|
(C++20) | specifies that a type is assignable from another type (concept) |
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