ceph/src/boost/libs/exception/example/cloning_1.cpp

   1 //Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc.
   2
   3 //Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 //file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 //This example shows how to enable cloning when throwing a boost::exception.
   7
   8 #include <boost/exception/info.hpp>
   9 #include <boost/exception/errinfo_errno.hpp>
  10 #include <stdio.h>
  11 #include <errno.h>
  12
  13 struct file_read_error: virtual boost::exception { };
  14
  15 void
  16 file_read( FILE * f, void * buffer, size_t size )
  17     {
  18     if( size!=fread(buffer,1,size,f) )
  19         throw boost::enable_current_exception(file_read_error()) <<
  20             boost::errinfo_errno(errno);
  21     }