Re: Class with functions that return STL containers with incomplete types

Greetings,

Having classes with member objects that have STL containers of
objects whose definitions are incomplete results in undefined
behavior. See for example:

http://www.ddj.com/database/184403814#8
http://www.parashift.com/c++-faq-lite/misc-technical-issues.html#faq-
39 .14

I am wondering: is it okay to have member functions that return an
STL container with an incomplete type? My member objects do not
contain incomplete types. For instance, would the following code be
OK? Thanks. --Omari

#include <boost/shared_ptr.hpp>
#include <vector>

class HasSelf
{
public:
    HasSelf(std::vector<HasSelf>& contents);
    std::vector<HasSelf> getContents() const;

private:
    std::vector<boost::shared_ptr<HasSelf> > _contents;
};