#ifndef __QUANTITY_HXX__
#define __QUANTITY_HXX__

#include <utility>
#include <boost/optional.hpp>
#include <boost/units/quantity.hpp>
#include <boost/units/systems/si/length.hpp>
#include <boost/units/systems/si/io.hpp>

/*----- Quantities ----------------------------------------------------------*/

namespace Quantities
{
    /*----- XXX_quantity_t --------------------------------------------------*/

// --- HACK - START
// replace following typedef
//    typedef boost::units::quantity<boost::units::si::length, double>  length_quantity_t;
// by struct to reduce symbol name length, which might result in the linker error LNK1179
//
    struct length_quantity_t : boost::units::quantity<boost::units::si::length, double>
    {
	typedef boost::units::quantity<boost::units::si::length, double> base_t;

	length_quantity_t::length_quantity_t() {}
	length_quantity_t::length_quantity_t(const base_t& r) : base_t(r) {}
    };
//--- HACK - END

    /*----- OptXXXQuantityT -------------------------------------------------*/

    typedef boost::optional<length_quantity_t> OptLengthQuantityT;

    /*----- parse_XXX_quantity ----------------------------------------------*/

    OptLengthQuantityT parse_length_quantity(
        const std::string& input, 
        const length_quantity_t& length_unit = 1.0 * boost::units::si::meter);

    /*----- parse_dbl_XXX_quantity ------------------------------------------*/

    typedef std::pair<OptLengthQuantityT, OptLengthQuantityT> PairOptLengthQuantityT;

    PairOptLengthQuantityT parse_dbl_length_quantity(
        const std::string& input, 
        const length_quantity_t& length_unit = 1.0 * boost::units::si::meter);

} // namespace Quantities

#endif // __QUANTITY_HXX__