Re: [Boost-users] container with large number of elements and a small number of invalide elements

On 31 October 2013 16:10, Klaim - Joël Lamotte wrote:

What would "valid"/"invalid" means here? If it's "exist" or "don't exist", then maybe using boost::optional<MyPod> would be enough.

That's right. How about sizeof( boost::optional<MyPod> ) vs sizeof( MyPOD ) ? Also, what sort of iterator can iterate over just the valid values? or how to implement one? The point here is that there's a small number of elements that are invalid, their indices in the container are random,