Specifies that an instance of the type can be constructed from an rvalue argument.
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 |
T(rv) | The value of T(rv) is equivalent to the value of rv before the initialization. The new value of |
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.
(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) |
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