C ++ 11 Moving semantics and STL containers

Question

Regarding the semantics of movement and containers:

I know that STL containers use relocation when relocation operations are defined in an element type. But how does he know if an element defined a move operation or not?
Why don't STL containers just call std :: move () on elements in any case, regardless of whether the element has defined move operations or not? I ask this because I know that you can call std :: move () on objects, even if its type does not define any move operations.

Thank.

+3

inhwank Feb 06 '14 at 2:32

1 answer

Tiago Gomes · Accepted Answer · 2014-02-06T02:37:32+0000

In short, this is exactly what they do, calling std::movewithout concern, whether he can move or just copy.

, , , std::vector::resize, std::move_if_nothrow std::move.