1//-----------------------------------------------------------------------------
2// boost variant/bad_visit.hpp header file
3// See http://www.boost.org for updates, documentation, and revision history.
4//-----------------------------------------------------------------------------
5//
6// Copyright (c) 2002-2003
7// Eric Friedman
8//
9// Distributed under the Boost Software License, Version 1.0. (See
10// accompanying file LICENSE_1_0.txt or copy at
11// http://www.boost.org/LICENSE_1_0.txt)
12
13#ifndef BOOST_VARIANT_BAD_VISIT_HPP
14#define BOOST_VARIANT_BAD_VISIT_HPP
15
16#include <boost/config.hpp>
17
18#include <exception>
19
20namespace boost {
21
22//////////////////////////////////////////////////////////////////////////
23// class bad_visit
24//
25// Exception thrown when a visitation attempt via apply_visitor fails due
26// to invalid visited subtype or contents.
27//
28struct BOOST_SYMBOL_VISIBLE bad_visit
29 : std::exception
30{
31public: // std::exception interface
32
33 const char * what() const BOOST_NOEXCEPT_OR_NOTHROW BOOST_OVERRIDE
34 {
35 return "boost::bad_visit: "
36 "failed visitation using boost::apply_visitor";
37 }
38
39};
40
41} // namespace boost
42
43#endif // BOOST_VARIANT_BAD_VISIT_HPP
44