#ifndef ROOTCOLUMNLESS_H
#define ROOTCOLUMNLESS_H

// ----------------------------------------------------------------------
//
// RootColumnLess.h -- define the comparator class to order columns
//                      withing a block for Root.
//
// For each to functions correctly we need to have the following order
// of columns in a block:
//
// All the other columns ordered by size of it elements.
//      This is to insure that all the column are going to be properly
//      aligned.  We also need to verify that the first byte of the
//      array allocated for the data will give us this alignement.
//      It means that if there is no index, it should be aligned for
//      a double and if not we should make sure that the first non index
//      column is aligned for double.

#include "HepTuple/ColumnLess.h"


ZM_BEGIN_NAMESPACE( zmht )	/*  namespace zmht  {  */

class RootColumnLess : public ColumnLess {

public:
  virtual bool operator()(const Column* x, const Column* y) const;
};


ZM_END_NAMESPACE( zmht )	/*  }  // namespace zmht  */

#endif  // ROOTCOLUMNLESS_H