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