#ifndef callback_hh #define callback_hh // callback.hh // marvin - programme du robot 2006. {{{ // // Copyright (C) 2003-2006 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 /// Class to store a callback. This callback can be of any type (function or /// fonctor). template class Callback { class AbstractHolder; AbstractHolder *holder_; public: /// Return value. typedef R result_type; public: /// Default constructor. Make an empty callback. Callback (void); /// Constructor. template Callback (T callback); /// Copy constructor. Callback (const Callback &other); /// Destructor. ~Callback (void); /// Assignement operator. Callback &operator= (const Callback &rhs); /// Call the contained callback. R operator () (void); /// Swap the callback content with another callback. void swap (Callback &rhs); /// Change the contained callback. template Callback &operator= (T rhs); /// Test if empty. bool empty (void) const; /// Test if not empty. operator bool (void) const; private: /// Abstract container. class AbstractHolder { public: virtual ~AbstractHolder (void); virtual R operator () (void) = 0; virtual AbstractHolder *clone (void) = 0; }; /// Templated container. template class Holder : public AbstractHolder { private: T callback_; public: Holder (T callback); virtual R operator () (void); virtual AbstractHolder *clone (void); }; }; /// Exception thrown on call of an empty callback. 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