C / C++ / MFC

// global typedefs
typedef classA<char> classA_type;
typedef classB<classA_type> classB_type;

// Instead of using two separate typedefs
// I'll try this
typedef classB<classA<char>> classB_type;
// This generates extrange compiler errors

// Instead of using two separate typedefs
// I'll try this
typedef classB<classA<char> > classB_type;
// This compiles with no errors

void shift_keys(map_type& map, map_type::size_type amt)
{
    // create new map with adjusted keys
    map_type new_map(map);
    map_type::iterator mi = map.begin();
    for( ; mi != map.end(); ++mi )
       new_map[std:make_pair((mi->first).first+amt,(mi->first).second+amt)]
           = mi->second;
    map.swap(new_map);
}
vod join(map_type& map1,map_type& map2)
{
    map_type new_map(map2)
    shift_keys(map2,map1.size());
    // join new_map to map1
    map_type::iterator mi = new_map.begin();
    for( ; mi != new_map.end(); ++mi )
       map1[mi->first] = mi->second;
}

CString sDraveLetter = _T('A'); // illegal

CString sDraveLetter = _T("A"); // ok

CString sDraveLetter;
sDraveLetter = TCHAR(i+_T('A')); // ok

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown