CODEWITHSUNDEEP
c++movemove-constructor
Foaly
Foaly

Reputation: 597

What happens if you move an object without move constructor?

What happens if std::move() is called on a user defined object, that defines no move constructor? Is it simply copied?

Upvotes: 5

Views: 1349

Answers (1)

user2428400
user2428400

Reputation:

Yes, move will fall back to copy. This is how standard containers like std::vector can implement resizing in terms of move, but remain compatible with classes which can only be copied.

However, the class may have an implicitly defined move constructor - see this guidance. http://en.cppreference.com/w/cpp/language/move_constructor#Implicitly-declared_move_constructor

Upvotes: 5

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