B>   namespace bb = boost;
B>   sort(
B>      arr.begin(), arr.end(), 
B>      bb::bind(greater<float>(),
B>         bb::bind(&CVector::y, bb::bind(&CUnitPos::coords, _1)),
B>         bb::bind(&CVector::y, bb::bind(&CUnitPos::coords, _2))
B>         )
B>      );
B>