| 1 | //Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc. |
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| 2 | |
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| 3 | //Distributed under the Boost Software License, Version 1.0. (See accompanying |
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| 4 | //file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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| 5 | |
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| 6 | //This example shows how to add data to boost::exception objects at the |
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| 7 | //point of the throw, and how to retrieve that data at the point of the catch. |
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| 8 | |
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| 9 | #include <boost/exception/all.hpp> |
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| 10 | #include <iostream> |
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| 11 | |
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| 12 | typedef boost::error_info<struct tag_my_info,int> my_info; //(1) |
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| 13 | |
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| 14 | struct my_error: virtual boost::exception, virtual std::exception { }; //(2) |
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| 15 | |
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| 16 | void |
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| 17 | f() |
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| 18 | { |
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| 19 | throw my_error() << my_info(42); //(3) |
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| 20 | } |
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| 21 | |
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| 22 | void |
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| 23 | g() |
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| 24 | { |
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| 25 | try |
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| 26 | { |
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| 27 | f(); |
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| 28 | } |
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| 29 | catch( |
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| 30 | my_error & x ) |
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| 31 | { |
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| 32 | if( int const * mi=boost::get_error_info<my_info>(some_exception&: x) ) |
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| 33 | std::cerr << "My info: " << *mi; |
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| 34 | } |
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| 35 | } |
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| 36 | |
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