#ifndef callback_hh #define callback_hh // callback.hh // robert - programme du robot 2005. {{{ // // Copyright (C) 2004 Nicolas Schodet // // 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. // // Contact : // Web: http://perso.efrei.fr/~schodet/ // Email: // }}} #include template class Callback { class AbstractHolder; AbstractHolder *holder_; public: typedef R result_type; public: Callback (void); template Callback (T callback); Callback (const Callback &other); ~Callback (void); R operator () (void); void swap (Callback &rhs); Callback &operator= (const Callback &rhs); template Callback &operator= (T rhs); bool empty (void) const; operator bool (void) const; private: class AbstractHolder { public: virtual ~AbstractHolder (void); virtual R operator () (void) = 0; virtual AbstractHolder *clone (void) = 0; }; template class Holder : public AbstractHolder { private: T callback_; public: Holder (T callback); virtual R operator () (void); virtual AbstractHolder *clone (void); }; }; class bad_callback : public std::runtime_error { public: bad_callback (void) : std::runtime_error ("bad_callback: empty callback call") { } }; #include "callback.tcc" #endif // callback_hh