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#ifndef interpreter_tcc
#define interpreter_tcc
// interpreter.tcc
// marvin - programme du robot 2006. {{{
//
// Copyright (C) 2006 Nicolas Schodet
//
// Robot APB Team/Efrei 2006.
//        Web: http://assos.efrei.fr/robot/
//      Email: robot AT efrei DOT fr
//
// 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 2 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, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// }}}
#include "utils/meta/remove_reference.hh"

#include <stdexcept>

/// Func class construction helper.
template<class T, typename F>
class Interpreter::MemFunc
{
};

/// Partially specialised for member functions taking an arguments list.
template<class T>
class Interpreter::MemFunc<T, bool (T::*) (const Interpreter::Args &)> : public Func
{
    T &i_;
    typedef bool (T::*F) (const Interpreter::Args &);
    F f_;
  public:
    MemFunc (T &i, F f) : i_ (i), f_ (f) { }
    bool operator() (const Args &a)
      {
	return (i_.*f_) (a);
      }
};

/// Partially specialised for members functions taking no argument.
template<class T>
class Interpreter::MemFunc<T, bool (T::*) (void)> : public Func
{
    T &i_;
    typedef bool (T::*F) (void);
    F f_;
  public:
    MemFunc (T &i, F f) : i_ (i), f_ (f) { }
    bool operator() (const Args &a)
      {
	if (!a.empty ())
	    throw std::runtime_error ("no argument expected");
	return (i_.*f_) ();
      }
};

/// Partially specialised for members functions taking one argument.
template<class T, typename A1>
class Interpreter::MemFunc<T, bool (T::*) (A1)> : public Func
{
    T &i_;
    typedef bool (T::*F) (A1);
    F f_;
  public:
    MemFunc (T &i, F f) : i_ (i), f_ (f) { }
    bool operator() (const Args &a)
      {
	Args::const_iterator i = a.begin ();
	if (a.size () != 1)
	    throw std::runtime_error ("one argument expected");
	A1 a1 = any_cast<typename meta::removeReference<A1>::type> (*i);
	return (i_.*f_) (a1);
      }
};

/// Partially specialised for members functions taking two arguments.
template<class T, typename A1, typename A2>
class Interpreter::MemFunc<T, bool (T::*) (A1, A2)> : public Func
{
    T &i_;
    typedef bool (T::*F) (A1, A2);
    F f_;
  public:
    MemFunc (T &i, F f) : i_ (i), f_ (f) { }
    bool operator() (const Args &a)
      {
	Args::const_iterator i = a.begin ();
	if (a.size () != 2)
	    throw std::runtime_error ("two arguments expected");
	A1 a1 = any_cast<typename meta::removeReference<A1>::type> (*i);
	A2 a2 = any_cast<typename meta::removeReference<A2>::type> (*++i);
	return (i_.*f_) (a1, a2);
      }
};

/// Partially specialised for members functions taking three arguments.
template<class T, typename A1, typename A2, typename A3>
class Interpreter::MemFunc<T, bool (T::*) (A1, A2, A3)> : public Func
{
    T &i_;
    typedef bool (T::*F) (A1, A2, A3);
    F f_;
  public:
    MemFunc (T &i, F f) : i_ (i), f_ (f) { }
    bool operator() (const Args &a)
      {
	Args::const_iterator i = a.begin ();
	if (a.size () != 3)
	    throw std::runtime_error ("three arguments expected");
	A1 a1 = any_cast<typename meta::removeReference<A1>::type> (*i);
	A2 a2 = any_cast<typename meta::removeReference<A2>::type> (*++i);
	A3 a3 = any_cast<typename meta::removeReference<A3>::type> (*++i);
	return (i_.*f_) (a1, a2, a3);
      }
};

/// Take all the template sophistications out of the programmer hands.
template<class T, typename F>
Interpreter::Func *
Interpreter::memFunc (T &i, F f)
{
    return new MemFunc<T, F> (i, f);
}

#endif // interpreter_tcc