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//Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc.
//Distributed under the Boost Software License, Version 1.0. (See accompanying
//file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//This example shows how to add data to boost::exception objects at the
//point of the throw, and how to retrieve that data at the point of the catch.
#include <boost/exception/all.hpp>
#include <iostream>
typedef boost::error_info<struct tag_my_info,int> my_info; //(1)
struct my_error: virtual boost::exception, virtual std::exception { }; //(2)
void
f()
{
throw my_error() << my_info(42); //(3)
}
void
g()
{
try
{
f();
}
catch(
my_error & x )
{
if( int const * mi=boost::get_error_info<my_info>(x) )
std::cerr << "My info: " << *mi;
}
}
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