   [C++] vectorT sorting
  Looking at the example from here I am trying to add sorting for a vector<T> in a class but I am getting "error: '__comp' cannot be used as a function"In my class I haveclass QuadManager {public:QuadManager();~QuadManager();bool operator() (Quad3D* quad1, Quad3D* quad2) { return (quad1->Texture()->Id() < quad2->Texture()->Id()); }vector<Quad3D*>m_quadArray;};Then in the class I try and sortsort(m_quadArray.begin(), m_quadArray.end(), this);
  this is a pointer. Compare needs to be value type, since sort calls p() or p.operator(), not p->operator().Solution would be to pass *this, but it is a very bad idea, since it is highly likely that one or more copies of compare object will be made.Compare predicate is typically implemented as a standalone class.   ;  Thanks I created a "QuadSorter" class this worked.   