equivalent.h

// Description: Equivalence
// Documentation: derived_predicates.txt

#ifndef PASTELSYS_EQUIVALENT_H
#define PASTELSYS_EQUIVALENT_H

#include "pastel/sys/algebra/less_concept.h"

namespace Pastel
{

    //! Returns whether elements are equivalent under a strict weak order.
    /*!
   left, right:
   The elements to compare.

   less:
   A strict weak order.
   */
    template <typename Type, typename Less>
    bool equivalent(const Type& left, const Type& right, 
        const Less& less)
    {
        return !less(left, right) && !less(right, left);
    }

}

#endif