JComparison.hh

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#ifndef __JLANG__JCOMPARISON__
#define __JLANG__JCOMPARISON__


/**
 * \author mdejong
 */

namespace JLANG {}
namespace JPP { using namespace JLANG; }

namespace JLANG {

  /**
   * Functional implementations of comparison operators.
   */
  struct JComparison {
    /**
     * Equal.
     * 
     * \param  first        first  object
     * \param  second       second object
     * \return              true if first object equal to second object; else false
     */
    struct eq {
      template<class T>
      bool operator()(const T& first, const T& second) const
      { 
        return first == second;
      }
    };


    /**
     * Not equal.
     * 
     * \param  first        first  object
     * \param  second       second object
     * \return              true if first object not equal to second object; else false
     */
    struct ne {
      template<class T>
      bool operator()(const T& first, const T& second) const
      {
        return first != second;
      }
    };


    /**
     * Less than.
     * 
     * \param  first        first  object
     * \param  second       second object
     * \return              true if first object less than second object; else false
     */
    struct lt {
      template<class T>
      bool operator()(const T& first, const T& second) const
      {
        return first < second;
      }
    };


    /**
     * Greater than.
     * 
     * \param  first        first  object
     * \param  second       second object
     * \return              true if first object greater than second object; else false
     */
    struct gt {
      template<class T>
      bool operator()(const T& first, const T& second) const
      {
        return first > second;
      }
    };


    /**
     * Less equals.
     * 
     * \param  first        first  object
     * \param  second       second object
     * \return              true if first object less than or equal to second object; else false
     */
    struct le {
      template<class T>
      bool operator()(const T& first, const T& second) const
      {
        return first <= second;
      }
    };


    /**
     * Greater equals.
     * 
     * \param  first        first  object
     * \param  second       second object
     * \return              true if first object greater than or equal to second object; else false
     */
    struct ge {
      template<class T>
      bool operator()(const T& first, const T& second) const
      {
        return first >= second;
      }
    };
  };
}

#endif