ceph/src/boost/libs/exception/example/enable_error_info.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 throw exception objects that support
   7 //transporting of arbitrary data to the catch site, even for types
   8 //that do not derive from boost::exception.
   9
  10 #include <boost/exception/all.hpp>
  11 #include <stdexcept>
  12
  13 typedef boost::error_info<struct tag_std_range_min,size_t> std_range_min;
  14 typedef boost::error_info<struct tag_std_range_max,size_t> std_range_max;
  15 typedef boost::error_info<struct tag_std_range_index,size_t> std_range_index;
  16
  17 template <class T>
  18 class
  19 my_container
  20     {
  21     public:
  22
  23     size_t size() const;
  24
  25     T const &
  26     operator[]( size_t i ) const
  27         {
  28         if( i > size() )
  29             throw boost::enable_error_info(std::range_error("Index out of range")) <<
  30                 std_range_min(0) <<
  31                 std_range_max(size()) <<
  32                 std_range_index(i);
  33         //....
  34         }
  35     };