boost/variant/bad_visit.hpp
//-----------------------------------------------------------------------------
// boost variant/bad_visit.hpp header file
// See http://www.boost.org for updates, documentation, and revision history.
//-----------------------------------------------------------------------------
//
// Copyright (c) 2002-2003
// Eric Friedman
//
// Permission to use, copy, modify, distribute and sell this software
// and its documentation for any purpose is hereby granted without fee,
// provided that the above copyright notice appears in all copies and
// that both the copyright notice and this permission notice appear in
// supporting documentation. No representations are made about the
// suitability of this software for any purpose. It is provided "as is"
// without express or implied warranty.
#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