generic_app.hpp

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/******************************************************************************
** Copyright © 2002 by J.M.McGuiness, coder@hussar.me.uk
**
** This library is free software; you can redistribute it and/or
** modify it under the terms of the GNU Lesser General Public
** License as published by the Free Software Foundation; either
** version 2.1 of the License, or (at your option) any later version.
**
** This library 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
** Lesser General Public License for more details.
**
** You should have received a copy of the GNU Lesser General Public
** License along with this library; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
 
namespace jmmcg { namespace LIBJMMCG_VER_NAMESPACE {
 
   template<typename ProgOpts,class Except_>
   class AppBase {
   public:
      typedef ProgOpts ProgramOptions;
 
      typedef Except_ exception_type;
 
      typedef Logger<exception_type> logger_type;
      typedef shared_ptr<logger_type, exception_type> logger_ptr_type;
 
      inline AppBase(ProgramOptions &p, const logger_ptr_type &l)
      : prog_opts(p), logger(l) {
         assert(logger);
      }
      AppBase(AppBase const &)=delete;
      virtual inline ~AppBase(void) {
      }
 
      virtual inline exit_codes Process(tostream &)=0;
 
   protected:
      ProgramOptions &prog_opts;
 
      inline const logger_type &Log(void) const noexcept(true) {
         assert(logger);
         return *logger;
      }
 
   private:
      const shared_ptr<const logger_type, exception_type> logger;
   };
 
} }