wax.hpp

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//
// Copyright 2010-2011 Ettus Research LLC
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
//

#ifndef INCLUDED_WAX_HPP
#define INCLUDED_WAX_HPP

#include <uhd/config.hpp>
#include <uhd/exception.hpp>
#include <boost/any.hpp>
#include <typeinfo>
#include <string>

namespace wax{

    class UHD_API obj{
    public:

        obj(void);

        obj(const obj &o);

        template<class T> obj(const T &o){
            _contents = o;
        }

        virtual ~obj(void);

        obj operator[](const obj &key);

        obj & operator=(const obj &val);

        obj get_link(void) const;

        const std::type_info & type(void) const;

        template<class T> T as(void) const{
            try{
                return boost::any_cast<T>(resolve());
            }
            catch(const boost::bad_any_cast &e){
                throw uhd::type_error(std::string("") + "Cannot wax cast " + type().name() + " to " + typeid(T).name() + " " + e.what());
            }
        }

    private:
        //private interface (override in subclasses)
        virtual void get(const obj &, obj &);
        virtual void set(const obj &, const obj &);

        boost::any resolve(void) const;

        //private contents of this obj
        boost::any _contents;

    };

} //namespace wax

#endif /* INCLUDED_WAX_HPP */