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41 lines
1.1 KiB
41 lines
1.1 KiB
//----------------------------------------------------------------------------- |
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// boost variant/bad_visit.hpp header file |
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// See http://www.boost.org for updates, documentation, and revision history. |
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//----------------------------------------------------------------------------- |
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// |
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// Copyright (c) 2002-2003 |
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// Eric Friedman |
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// |
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// Distributed under the Boost Software License, Version 1.0. (See |
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// accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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#ifndef BOOST_VARIANT_BAD_VISIT_HPP |
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#define BOOST_VARIANT_BAD_VISIT_HPP |
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#include <exception> |
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namespace boost { |
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////////////////////////////////////////////////////////////////////////// |
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// class bad_visit |
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// |
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// Exception thrown when a visitation attempt via apply_visitor fails due |
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// to invalid visited subtype or contents. |
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// |
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struct bad_visit |
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: std::exception |
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{ |
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public: // std::exception interface |
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virtual const char * what() const throw() |
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{ |
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return "boost::bad_visit: " |
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"failed visitation using boost::apply_visitor"; |
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} |
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}; |
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} // namespace boost |
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#endif // BOOST_VARIANT_BAD_VISIT_HPP
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