williamr@2: //-----------------------------------------------------------------------------
williamr@2: // boost variant/bad_visit.hpp header file
williamr@2: // See http://www.boost.org for updates, documentation, and revision history.
williamr@2: //-----------------------------------------------------------------------------
williamr@2: //
williamr@2: // Copyright (c) 2002-2003
williamr@2: // Eric Friedman
williamr@2: //
williamr@2: // Distributed under the Boost Software License, Version 1.0. (See
williamr@2: // accompanying file LICENSE_1_0.txt or copy at
williamr@2: // http://www.boost.org/LICENSE_1_0.txt)
williamr@2: 
williamr@2: #ifndef BOOST_VARIANT_BAD_VISIT_HPP
williamr@2: #define BOOST_VARIANT_BAD_VISIT_HPP
williamr@2: 
williamr@2: #include <exception>
williamr@2: 
williamr@2: namespace boost {
williamr@2: 
williamr@2: //////////////////////////////////////////////////////////////////////////
williamr@2: // class bad_visit
williamr@2: //
williamr@2: // Exception thrown when a visitation attempt via apply_visitor fails due
williamr@2: // to invalid visited subtype or contents.
williamr@2: //
williamr@2: struct bad_visit
williamr@2:     : std::exception
williamr@2: {
williamr@2: public: // std::exception interface
williamr@2: 
williamr@2:     virtual const char * what() const throw()
williamr@2:     {
williamr@2:         return "boost::bad_visit: "
williamr@2:                "failed visitation using boost::apply_visitor";
williamr@2:     }
williamr@2: 
williamr@2: };
williamr@2: 
williamr@2: } // namespace boost
williamr@2: 
williamr@2: #endif // BOOST_VARIANT_BAD_VISIT_HPP