class Elem;
class ElemVec : public vector<Elem>
{
    public:
        void foo();
};

void ElemVec::foo()
{
    BOOST_FOREACH(Elem& elem, *this)
    {
        // Do something with elem
    }
    return;
}

error C2355: 'this' : can only be referenced inside non-static member functions

void ElemVec::foo()
{
    ElemVec* This = this;
    BOOST_FOREACH(Elem& elem, *This)
    {
        // Do something with elem
    }
    return;
}

#include <boost/foreach.hpp>
using namespace std;
struct xxx : std::vector<int>
{
    void test()
    {
        BOOST_FOREACH(int x, *this)
        {
        }
    }
};

int main(void) {
    xxx x;
    x.test();
    return 0;
}