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#
fndef interpreter_hh
#define interpreter_hh
// interpreter.hh
// 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/any.hh"

#include <map>

class Interpreter
{
  public:
    /// Function arguments.
    typedef any Arg;
    /// Function arguments list.
    typedef std::list<Arg> Args;
    /// Functions must inherit from this type.
    class Func
      {
      public:
	/// Mandatory virtual destructor.
	virtual ~Func (void)
	  { }
	/// Called on function invocation, getting the argument list and
	/// returning true on success.
	virtual void operator() (const Args &, bool dryrun) = 0;
      };
  private:
    /// Func class construction helper.
    template<class T, typename F>
	class MemFunc;
  private:
    struct FuncDesc
      {
	Func *func;
	std::string desc;
	FuncDesc (Func *func_, const std::string &desc_)
	    : func (func_), desc (desc_) { }
      };
    /// Type of the private function map.
    typedef std::map<std::string, FuncDesc> Funcs;
    /// The function map itself.
    Funcs funcs_;
  public:
    /// Destructor.
    ~Interpreter (void);
    /// Add a function, Interpreter owns f.
    void add (const std::string &s, Func *f, const std::string &desc);
    /// Add a function without description, Interpreter owns f.
    void add (const std::string &s, Func *f);
    /// Test if a function is defined.
    bool exists (const std::string &s) const;
    /// Call a function by name.
    void call (const std::string &s, const Args &a,
	       bool dryrun = false) const;
    /// Interpret a string.
    void interpretString (const std::string &s, bool dryrun = false);
    /// Interpret a file.
    void interpretFile (const std::string &file, bool dryrun = false);
    /// Return an help string.
    std::string help (void) const;
    /// Take all the template sophistications out of the programmer hands.
    template<class T, typename F>
	static Func *memFunc (T &i, F f);
};

#include "interpreter.tcc"

#endif // interpreter_hh