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C++ concepts: MoveConstructible (since C++11)

From cppreference.com
< cpp‎ | concept

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

[edit] Requirements

The type T satisfies MoveConstructible if

Given

  • rv, an rvalue expression of type Type
  • 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.

[edit] 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.

[edit] See also

checks if a type has a move constructor
(class template) [edit]