Chris@102: // Copyright Kevlin Henney, 2000-2005.
Chris@102: // Copyright Alexander Nasonov, 2006-2010.
Chris@102: // Copyright Antony Polukhin, 2011-2014.
Chris@102: //
Chris@102: // Distributed under the Boost Software License, Version 1.0. (See
Chris@102: // accompanying file LICENSE_1_0.txt or copy at
Chris@102: // http://www.boost.org/LICENSE_1_0.txt)
Chris@102: //
Chris@102: // what:  lexical_cast custom keyword cast
Chris@102: // who:   contributed by Kevlin Henney,
Chris@102: //        enhanced with contributions from Terje Slettebo,
Chris@102: //        with additional fixes and suggestions from Gennaro Prota,
Chris@102: //        Beman Dawes, Dave Abrahams, Daryle Walker, Peter Dimov,
Chris@102: //        Alexander Nasonov, Antony Polukhin, Justin Viiret, Michael Hofmann,
Chris@102: //        Cheng Yang, Matthew Bradbury, David W. Birdsall, Pavel Korzh and other Boosters
Chris@102: // when:  November 2000, March 2003, June 2005, June 2006, March 2011 - 2014
Chris@102: 
Chris@102: #ifndef BOOST_LEXICAL_CAST_BAD_LEXICAL_CAST_HPP
Chris@102: #define BOOST_LEXICAL_CAST_BAD_LEXICAL_CAST_HPP
Chris@102: 
Chris@102: #include <boost/config.hpp>
Chris@102: #ifdef BOOST_HAS_PRAGMA_ONCE
Chris@102: #   pragma once
Chris@102: #endif
Chris@102: 
Chris@102: #include <typeinfo>
Chris@102: #include <exception>
Chris@102: #include <boost/throw_exception.hpp>
Chris@102: 
Chris@102: namespace boost
Chris@102: {
Chris@102:     // exception used to indicate runtime lexical_cast failure
Chris@102:     class BOOST_SYMBOL_VISIBLE bad_lexical_cast :
Chris@102:     // workaround MSVC bug with std::bad_cast when _HAS_EXCEPTIONS == 0 
Chris@102: #if defined(BOOST_MSVC) && defined(_HAS_EXCEPTIONS) && !_HAS_EXCEPTIONS 
Chris@102:         public std::exception 
Chris@102: #else 
Chris@102:         public std::bad_cast 
Chris@102: #endif 
Chris@102: 
Chris@102: #if defined(__BORLANDC__) && BOOST_WORKAROUND( __BORLANDC__, < 0x560 )
Chris@102:         // under bcc32 5.5.1 bad_cast doesn't derive from exception
Chris@102:         , public std::exception
Chris@102: #endif
Chris@102: 
Chris@102:     {
Chris@102:     public:
Chris@102:         bad_lexical_cast() BOOST_NOEXCEPT
Chris@102: #ifndef BOOST_NO_TYPEID
Chris@102:            : source(&typeid(void)), target(&typeid(void))
Chris@102: #endif
Chris@102:         {}
Chris@102: 
Chris@102:         virtual const char *what() const BOOST_NOEXCEPT_OR_NOTHROW {
Chris@102:             return "bad lexical cast: "
Chris@102:                    "source type value could not be interpreted as target";
Chris@102:         }
Chris@102: 
Chris@102:         virtual ~bad_lexical_cast() BOOST_NOEXCEPT_OR_NOTHROW
Chris@102:         {}
Chris@102: 
Chris@102: #ifndef BOOST_NO_TYPEID
Chris@102:         bad_lexical_cast(
Chris@102:                 const std::type_info &source_type_arg,
Chris@102:                 const std::type_info &target_type_arg) BOOST_NOEXCEPT
Chris@102:             : source(&source_type_arg), target(&target_type_arg)
Chris@102:         {}
Chris@102: 
Chris@102:         const std::type_info &source_type() const BOOST_NOEXCEPT {
Chris@102:             return *source;
Chris@102:         }
Chris@102: 
Chris@102:         const std::type_info &target_type() const BOOST_NOEXCEPT {
Chris@102:             return *target;
Chris@102:         }
Chris@102: 
Chris@102:     private:
Chris@102:         const std::type_info *source;
Chris@102:         const std::type_info *target;
Chris@102: #endif
Chris@102:     };
Chris@102: 
Chris@102:     namespace conversion { namespace detail {
Chris@102: #ifdef BOOST_NO_TYPEID
Chris@102:         template <class S, class T>
Chris@102:         inline void throw_bad_cast() {
Chris@102:             boost::throw_exception(bad_lexical_cast());
Chris@102:         }
Chris@102: #else
Chris@102:         template <class S, class T>
Chris@102:         inline void throw_bad_cast() {
Chris@102:             boost::throw_exception(bad_lexical_cast(typeid(S), typeid(T)));
Chris@102:         }
Chris@102: #endif
Chris@102:     }} // namespace conversion::detail
Chris@102: 
Chris@102: 
Chris@102: } // namespace boost
Chris@102: 
Chris@102: #endif // BOOST_LEXICAL_CAST_BAD_LEXICAL_CAST_HPP
Chris@102: