class Example
{
public:
std::vector<variant<typeA, typeB, typeC> > content;
}

I want to add three members to my class that are vectors of pointers to
the specific content items

class Example
{
public:
std::vector<variant<typeA, typeB, typeC> > content;

std::vector<typeA> *contentA;
std::vector<typeB> *contentB;
std::vector<typeC> *contentC;
}

Now the question: how can I iterate through the vector content whilst
adding its items to the other 3 vectors depending on their type? I know
there has to be some way using the apply_visitor functor, but I just
don't see how exactly...

// untested pseudo-code

struct segregator : boost::static_visitor<>

{

segregator(vector &contentA, etc for all the types) : contentA_(contentA), etc for all the types

{}

void operator()(const typeA &a) const

{

contentA_.push_back(a);

}

// etc for all the types

private:

vector<typeA> &contentA_;//etc for all the types

};

int main()

{

typedef variant<typeA, typeB, typeC> variant_type;

vector<typeA> contentA;

segregator seg(contentA,...);

for_each(content.begin(), content.end(), seg);

}