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#ifndef ARY_IDSORT_HXX
#define ARY_IDSORT_HXX


/** A compare function that sorts ids of repository entities in the same
    storage.

    @see ::ary::SortedIds
*/
template<class COMPARE>
struct IdSorter
{
    bool                operator()(
                            typename COMPARE::id_type
                                                i_1,
                            typename COMPARE::id_type
                                                i_2 ) const
                            { return COMPARE::Lesser_(
                                        COMPARE::KeyOf_(COMPARE::EntityOf_(i_1)),
                                        COMPARE::KeyOf_(COMPARE::EntityOf_(i_2)) );
                            }
};


#endif