C:/nobackup/private/physical_svn/trunk/include/physical/format.hpp

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/*=============================================================================
    physical quantities / units / constants
    Copyright (c) 2006, 2007 Martin Schulz
    http://physical.sourceforge.net
  
    This is private code by Martin Schulz.
  
    Use, modification and distribution is subject to the Boost Software
    License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
    http://www.boost.org/LICENSE_1_0.txt)
=============================================================================*/

#ifndef PHYSICAL_FORMAT
#define PHYSICAL_FORMAT

#include <ostream>

#include "physical/dynamicphysical.hpp"
#include "physical/formatspec.hpp"


namespace physical {

        namespace format {

                namespace detail {

         template<class UnitSystem>
                        std::ostream& format_to_spec(std::ostream& os, DynamicPhysical<UnitSystem> quantity, FormatSpec<UnitSystem> spec);

                }; // namespace detail

                // formatting objects to be used with std::ostreams:
        
                // FIXME: what members to hold as copy, which as reference?
      template<class UnitSystem>
                struct formatted {
                        FormatSpec<UnitSystem> spec;
                        DynamicPhysical<UnitSystem> quantity;
                        formatted(const DynamicPhysical<UnitSystem>& q, const FormatSpec<UnitSystem>& s): quantity(q), spec(s) {};
                };

                // FIXME: what members to hold as copy, which as reference?
      template<class UnitSystem>
                struct formatter {
                        FormatSpec<UnitSystem> spec;
                        formatter(const FormatSpec<UnitSystem>& s): spec(s) {};
                        formatted<UnitSystem> operator()(const DynamicPhysical<UnitSystem>& q) {return formatted<UnitSystem>(q, spec);};
                };
                        

      template<class UnitSystem>
                inline formatter<UnitSystem> format(const FormatSpec<UnitSystem>& s) {return formatter<UnitSystem>(s);};

      template<class UnitSystem>
                inline formatted<UnitSystem> format(const DynamicPhysical<UnitSystem>& q, const FormatSpec<UnitSystem>& s) {return formatted<UnitSystem>(q,s);};



      template<class UnitSystem>
                inline std::ostream& operator<<(std::ostream& os, const formatted<UnitSystem>& f) {
                        return detail::format_to_spec(os, f.quantity, f.spec);
                };

        }; // namespace format

}; // namespace physical

#include "physical/detail/format_impl.hpp"

#endif // PHYSICAL_FORMAT

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