#ifndef __JLANG__JEQUATION_T__
#define __JLANG__JEQUATION_T__

#include <locale>

#include "JLang/JEquation.hh"
#include "JLang/JEquationFacet.hh"
#include "JLang/JEquationParameters.hh"


/**
 * \author mdejong
 */

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

namespace JLANG {

  /**
   * Auxiliary data structure to read equations.
   */
  struct JEquation_t :
    public JEquation
  {
    /**
     * Get equation parameters.
     *
     * \return                         equation parameters
     */
    static inline JEquationParameters& getEquationParameters()
    {
      static JEquationParameters equation("=", ",", "./", "#");

      return equation;
    }


    /**
     * Set equation parameters.
     *
     * \param  equation                equation parameters
     */
    static inline void setEquationParameters(const JEquationParameters& equation)
    {
      getEquationParameters() = equation;
    }


    /**
     * Read equation from input stream.
     *
     * \param  in               input stream
     * \param  equation         equation
     * \return                  input stream
     */
    friend inline std::istream& operator>>(std::istream& in, JEquation_t& equation)
    {
      using namespace std;
      using namespace JPP;

      const locale loc = in.imbue(locale(in.getloc(), new JEquationFacet(JEquationParameters())));

      in >> static_cast<JEquation&>(equation);

      //in.imbue(loc);

      return in;
    }
  };
}

#endif