| //----------------------------------------------------------------------------- |
| // 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 |