107 lines
3.2 KiB
C++
107 lines
3.2 KiB
C++
|
// Copyright Kevlin Henney, 2000-2005.
|
||
|
|
// Copyright Alexander Nasonov, 2006-2010.
|
||
|
|
// Copyright Antony Polukhin, 2011-2020.
|
||
|
|
//
|
||
|
|
// 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)
|
||
|
|
//
|
||
|
|
// what: lexical_cast custom keyword cast
|
||
|
|
// who: contributed by Kevlin Henney,
|
||
|
|
// enhanced with contributions from Terje Slettebo,
|
||
|
|
// with additional fixes and suggestions from Gennaro Prota,
|
||
|
|
// Beman Dawes, Dave Abrahams, Daryle Walker, Peter Dimov,
|
||
|
|
// Alexander Nasonov, Antony Polukhin, Justin Viiret, Michael Hofmann,
|
||
|
|
// Cheng Yang, Matthew Bradbury, David W. Birdsall, Pavel Korzh and other Boosters
|
||
|
|
// when: November 2000, March 2003, June 2005, June 2006, March 2011 - 2014
|
||
|
|
|
||
|
|
#ifndef BOOST_LEXICAL_CAST_BAD_LEXICAL_CAST_HPP
|
||
|
|
#define BOOST_LEXICAL_CAST_BAD_LEXICAL_CAST_HPP
|
||
|
|
|
||
|
|
#include <boost/config.hpp>
|
||
|
|
#ifdef BOOST_HAS_PRAGMA_ONCE
|
||
|
|
# pragma once
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include <exception>
|
||
|
|
#include <typeinfo>
|
||
|
|
#include <boost/throw_exception.hpp>
|
||
|
|
|
||
|
|
namespace boost
|
||
|
|
{
|
||
|
|
// exception used to indicate runtime lexical_cast failure
|
||
|
|
class BOOST_SYMBOL_VISIBLE bad_lexical_cast :
|
||
|
|
// workaround MSVC bug with std::bad_cast when _HAS_EXCEPTIONS == 0
|
||
|
|
#if defined(BOOST_MSVC) && defined(_HAS_EXCEPTIONS) && !_HAS_EXCEPTIONS
|
||
|
|
public std::exception
|
||
|
|
#else
|
||
|
|
public std::bad_cast
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if defined(BOOST_BORLANDC) && BOOST_WORKAROUND( BOOST_BORLANDC, < 0x560 )
|
||
|
|
// under bcc32 5.5.1 bad_cast doesn't derive from exception
|
||
|
|
, public std::exception
|
||
|
|
#endif
|
||
|
|
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
bad_lexical_cast() BOOST_NOEXCEPT
|
||
|
|
#ifndef BOOST_NO_TYPEID
|
||
|
|
: source(&typeid(void)), target(&typeid(void))
|
||
|
|
#endif
|
||
|
|
{}
|
||
|
|
|
||
|
|
const char *what() const BOOST_NOEXCEPT_OR_NOTHROW BOOST_OVERRIDE {
|
||
|
|
return "bad lexical cast: "
|
||
|
|
"source type value could not be interpreted as target";
|
||
|
|
}
|
||
|
|
|
||
|
|
~bad_lexical_cast() BOOST_NOEXCEPT_OR_NOTHROW BOOST_OVERRIDE
|
||
|
|
{}
|
||
|
|
|
||
|
|
#ifndef BOOST_NO_TYPEID
|
||
|
|
private:
|
||
|
|
#ifdef BOOST_NO_STD_TYPEINFO
|
||
|
|
typedef ::type_info type_info_t;
|
||
|
|
#else
|
||
|
|
typedef ::std::type_info type_info_t;
|
||
|
|
#endif
|
||
|
|
public:
|
||
|
|
bad_lexical_cast(
|
||
|
|
const type_info_t &source_type_arg,
|
||
|
|
const type_info_t &target_type_arg) BOOST_NOEXCEPT
|
||
|
|
: source(&source_type_arg), target(&target_type_arg)
|
||
|
|
{}
|
||
|
|
|
||
|
|
const type_info_t &source_type() const BOOST_NOEXCEPT {
|
||
|
|
return *source;
|
||
|
|
}
|
||
|
|
|
||
|
|
const type_info_t &target_type() const BOOST_NOEXCEPT {
|
||
|
|
return *target;
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
const type_info_t *source;
|
||
|
|
const type_info_t *target;
|
||
|
|
#endif
|
||
|
|
};
|
||
|
|
|
||
|
|
namespace conversion { namespace detail {
|
||
|
|
#ifdef BOOST_NO_TYPEID
|
||
|
|
template <class S, class T>
|
||
|
|
inline void throw_bad_cast() {
|
||
|
|
boost::throw_exception(bad_lexical_cast());
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
template <class S, class T>
|
||
|
|
inline void throw_bad_cast() {
|
||
|
|
boost::throw_exception(bad_lexical_cast(typeid(S), typeid(T)));
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}} // namespace conversion::detail
|
||
|
|
|
||
|
|
} // namespace boost
|
||
|
|
|
||
|
|
#endif // BOOST_LEXICAL_CAST_BAD_LEXICAL_CAST_HPP
|