LuaVariable.hpp

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/******************************************************************************\
* LuaVariable.hpp                                                              *
* A variable living in a Lua interpreter.                                      *
*                                                                              *
*                                                                              *
* Copyright (C) 2005-2007 by Leandro Motta Barros.                             *
*                                                                              *
* Permission is hereby granted, free of charge, to any person obtaining a copy *
* of this software and associated documentation files (the "Software"), to     *
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* sell copies of the Software, and to permit persons to whom the Software is   *
* furnished to do so, subject to the following conditions:                     *
*                                                                              *
* The above copyright notice and this permission notice shall be included in   *
* all copies or substantial portions of the Software.                          *
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* IN THE SOFTWARE.                                                             *
\******************************************************************************/

#ifndef _DILUCULUM_LUA_VARIABLE_HPP_
#define _DILUCULUM_LUA_VARIABLE_HPP_

#include <vector>
#include <Diluculum/LuaValue.hpp>


namespace Diluculum
{
   class LuaVariable
   {
      friend class LuaState;

      public:
         const LuaValue& operator= (const LuaValue& rhs);

         LuaValue value() const;

         LuaVariable operator[] (const LuaValue& key) const;

         LuaValueList operator()(const LuaValueList& params);

         LuaValueList operator()();

         LuaValueList operator() (const LuaValue& param);

         LuaValueList operator() (const LuaValue& param1,
                                  const LuaValue& param2);

         LuaValueList operator() (const LuaValue& param1,
                                  const LuaValue& param2,
                                  const LuaValue& param3);

         LuaValueList operator() (const LuaValue& param1,
                                  const LuaValue& param2,
                                  const LuaValue& param3,
                                  const LuaValue& param4);

         LuaValueList operator() (const LuaValue& param1,
                                  const LuaValue& param2,
                                  const LuaValue& param3,
                                  const LuaValue& param4,
                                  const LuaValue& param5);

         bool operator== (const LuaValue& rhs) const
         { return value() == rhs; }

         bool operator== (const LuaVariable& rhs) const
         { return state_ == rhs.state_ && keys_ == rhs.keys_; }

         bool operator!= (const LuaVariable& rhs) const
         { return state_ != rhs.state_ || keys_ != rhs.keys_; }

         typedef std::vector<LuaValue> KeyList;

         const KeyList& getKeys() const { return keys_; }

         void pushLastTable();

         lua_State* getState() { return state_; }

      private:

         LuaVariable (lua_State* state, const LuaValue& key,
                      const KeyList& predKeys = KeyList());

         void pushTheReferencedValue() const;

         lua_State* state_;

         KeyList keys_;
   };

} // namespace Diluculum

#endif // _DILUCULUM_LUA_VARIABLE_HPP_

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