AbstractLinAlgPack_compare_element_indexes.hpp

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#ifndef COMPARE_ELEMENT_INDEXES_H
#define COMPARE_ELEMENT_INDEXES_H

#include <functional>

#include "AbstractLinAlgPack_Types.hpp"

namespace AbstractLinAlgPack {


template<class T_Element>
struct compare_element_indexes_less
  : public std::unary_function< T_Element, typename T_Element::index_type >
{
  bool operator()(const T_Element& ele1, const T_Element& ele2) {
    return ele1.index() < ele2.index();
  }
  bool operator()(typename T_Element::index_type i, const T_Element& ele2) {
    return i < ele2.index();
  }
  bool operator()(const T_Element& ele1, typename T_Element::index_type i) {
    return ele1.index() < i;
  }
};

template<class T_Element>
struct compare_element_indexes_equal_to
  : public std::unary_function< T_Element, typename T_Element::index_type >
{
  compare_element_indexes_equal_to( typename T_Element::index_type i )
    : i_(i)
  {}
  bool operator()(const T_Element& ele) {
    return ele.index() == i_;
  }
private:
  typename T_Element::index_type i_;
  // Not defined and not to be called
  compare_element_indexes_equal_to();
};


} // end namespace AbstractLinAlgPack

#endif   // COMPARE_ELEMENT_INDEXES_H