Algorithm functions cannot be used with CTypedPtrArray of MFC.

[K-Magara]

If you use an algorithm function with CTypedPtrArray, you will get a compile error where the template arguments do not match with std::swap(). I used reverse() as an example, but the same was true for sort() and so on. The following sample code is a console application + MFC, and unnecessary initialization is omitted. Boost 1.76, Tried with Visual Studio 2015 and 2019

#include "boost/foreach.hpp"
#include "boost/range/mfc.hpp"
#include "boost/range/algorithm.hpp"

class CMyClass
{
    int _m;
public:
    CMyClass(int m):_m(m) {}
    int GetType(void) {
        return _m;
    }
};

int main()
{
    CTypedPtrArray<CPtrArray, CMyClass*>    ar;
    CMyClass*   p;
    for ( int i=0; i<3; i++ ) {
        p = new CMyClass(i);
        ar.Add(p);
    }
    BOOST_FOREACH(p, ar) {
        printf("%d\n", p->GetType());
    }
    boost::reverse(ar);     // Error with std::swap()
    BOOST_FOREACH(p, ar) {
        printf("%d\n", p->GetType());
        delete  p;
    }
}

It works fine with CPtrArray instead of CTypedPtrArray.

    CPtrArray   ar;
    CMyClass*   p;
    for ( int i=0; i<3; i++ ) {
        p = new CMyClass(i);
        ar.Add(p);
    }
    BOOST_FOREACH(auto pp, ar) {
        printf("%d\n", ((CMyClass*)pp)->GetType());
    }
    boost::reverse(ar);     // ok !!
    BOOST_FOREACH(auto pp, ar) {
        printf("%d\n", ((CMyClass*)pp)->GetType());
        delete  pp;
    }

I suspect something is missing in the CTypedPtrArray definition in mfc.hpp, but I didn't know what it was.

[K-Magara]

I got in touch with the author. It turned out to be impossible, so I will close it.