/*
 * FunctionArgument.hpp
 *
 *  Created on: 02.10.2012
 *      Author: heber
 */

#ifndef FUNCTIONARGUMENT_HPP_
#define FUNCTIONARGUMENT_HPP_

// include config.h
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <utility>

/** This class encapsulates all information with respect to a single argument
 *  for a high-dimensional model function.
 *
 *  We restrict ourselves here to a function that dependent on a set of
 *  three-dimensional vectors, i.e. a set of positions in space. And for
 *  the moment to distances in between these sets.
 *
 */
struct argument_t
{
  typedef std::pair<size_t, size_t> indices_t;

  /** Default constructor for class argument_t.
   *
   */
  argument_t() :
    indices( std::make_pair(0,1) ),
    distance(0.)
  {}

  /** Constructor for class argument_t.
   *
   * This constructors uses the index pair (0,1) as default.
   *
   * \param _distance distance argument
   */
  argument_t(const double &_distance) :
    indices( std::make_pair(0,1) ),
    distance(_distance)
  {}

  /** Constructor for class argument_t.
   *
   * \param _indices pair of indices associated with the \a _distance
   * \param _distance distance argument
   */
  argument_t(const indices_t &_indices, const double &_distance) :
    indices( _indices ),
    distance(_distance)
  {}

  //!> indices between which the distance is given
  indices_t indices;
  //!> distance
  double distance;
};

#endif /* FUNCTIONARGUMENT_HPP_ */