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138
externals/vcpkg/packages/boost-lexical-cast_x64-windows/include/boost/detail/basic_pointerbuf.hpp vendored Executable file
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//-----------------------------------------------------------------------------
// boost detail/templated_streams.hpp header file
// See http://www.boost.org for updates, documentation, and revision history.
//-----------------------------------------------------------------------------
//
// Copyright (c) 2013 John Maddock, Antony Polukhin
//
//
// 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)
#ifndef BOOST_DETAIL_BASIC_POINTERBUF_HPP
#define BOOST_DETAIL_BASIC_POINTERBUF_HPP
// MS compatible compilers support #pragma once
#if defined(_MSC_VER)
# pragma once
#endif
#include "boost/config.hpp"
#include <streambuf>
namespace boost { namespace detail {
//
// class basic_pointerbuf:
// acts as a stream buffer which wraps around a pair of pointers:
//
template <class charT, class BufferT >
class basic_pointerbuf : public BufferT {
protected:
typedef BufferT base_type;
typedef basic_pointerbuf<charT, BufferT> this_type;
typedef typename base_type::int_type int_type;
typedef typename base_type::char_type char_type;
typedef typename base_type::pos_type pos_type;
typedef ::std::streamsize streamsize;
typedef typename base_type::off_type off_type;
public:
basic_pointerbuf() : base_type() { this_type::setbuf(0, 0); }
const charT* getnext() { return this->gptr(); }
#ifndef BOOST_NO_USING_TEMPLATE
using base_type::pptr;
using base_type::pbase;
#else
charT* pptr() const { return base_type::pptr(); }
charT* pbase() const { return base_type::pbase(); }
#endif
protected:
// VC mistakenly assumes that `setbuf` and other functions are not referenced.
// Marking those functions with `inline` suppresses the warnings.
// There must be no harm from marking virtual functions as inline: inline virtual
// call can be inlined ONLY when the compiler knows the "exact class".
inline base_type* setbuf(char_type* s, streamsize n) BOOST_OVERRIDE;
inline typename this_type::pos_type seekpos(pos_type sp, ::std::ios_base::openmode which) BOOST_OVERRIDE;
inline typename this_type::pos_type seekoff(off_type off, ::std::ios_base::seekdir way, ::std::ios_base::openmode which) BOOST_OVERRIDE;
private:
basic_pointerbuf& operator=(const basic_pointerbuf&);
basic_pointerbuf(const basic_pointerbuf&);
};
template<class charT, class BufferT>
BufferT*
basic_pointerbuf<charT, BufferT>::setbuf(char_type* s, streamsize n)
{
this->setg(s, s, s + n);
return this;
}
template<class charT, class BufferT>
typename basic_pointerbuf<charT, BufferT>::pos_type
basic_pointerbuf<charT, BufferT>::seekoff(off_type off, ::std::ios_base::seekdir way, ::std::ios_base::openmode which)
{
typedef typename boost::int_t<sizeof(way) * CHAR_BIT>::least cast_type;
if(which & ::std::ios_base::out)
return pos_type(off_type(-1));
std::ptrdiff_t size = this->egptr() - this->eback();
std::ptrdiff_t pos = this->gptr() - this->eback();
charT* g = this->eback();
switch(static_cast<cast_type>(way))
{
case ::std::ios_base::beg:
if((off < 0) || (off > size))
return pos_type(off_type(-1));
else
this->setg(g, g + off, g + size);
break;
case ::std::ios_base::end:
if((off < 0) || (off > size))
return pos_type(off_type(-1));
else
this->setg(g, g + size - off, g + size);
break;
case ::std::ios_base::cur:
{
std::ptrdiff_t newpos = static_cast<std::ptrdiff_t>(pos + off);
if((newpos < 0) || (newpos > size))
return pos_type(off_type(-1));
else
this->setg(g, g + newpos, g + size);
break;
}
default: ;
}
#ifdef BOOST_MSVC
#pragma warning(push)
#pragma warning(disable:4244)
#endif
return static_cast<pos_type>(this->gptr() - this->eback());
#ifdef BOOST_MSVC
#pragma warning(pop)
#endif
}
template<class charT, class BufferT>
typename basic_pointerbuf<charT, BufferT>::pos_type
basic_pointerbuf<charT, BufferT>::seekpos(pos_type sp, ::std::ios_base::openmode which)
{
if(which & ::std::ios_base::out)
return pos_type(off_type(-1));
off_type size = static_cast<off_type>(this->egptr() - this->eback());
charT* g = this->eback();
if(off_type(sp) <= size)
{
this->setg(g, g + off_type(sp), g + size);
}
return pos_type(off_type(-1));
}
}} // namespace boost::detail
#endif // BOOST_DETAIL_BASIC_POINTERBUF_HPP

185
externals/vcpkg/packages/boost-lexical-cast_x64-windows/include/boost/detail/lcast_precision.hpp vendored Executable file
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// Copyright Alexander Nasonov & Paul A. Bristow 2006.
// Use, modification and distribution are subject to 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)
#ifndef BOOST_DETAIL_LCAST_PRECISION_HPP_INCLUDED
#define BOOST_DETAIL_LCAST_PRECISION_HPP_INCLUDED
#include <climits>
#include <ios>
#include <limits>
#include <boost/config.hpp>
#include <boost/integer_traits.hpp>
#ifndef BOOST_NO_IS_ABSTRACT
// Fix for SF:1358600 - lexical_cast & pure virtual functions & VC 8 STL
#include <boost/type_traits/conditional.hpp>
#include <boost/type_traits/is_abstract.hpp>
#endif
#if defined(BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS) || \
(defined(BOOST_MSVC) && (BOOST_MSVC<1310))
#define BOOST_LCAST_NO_COMPILE_TIME_PRECISION
#endif
#ifdef BOOST_LCAST_NO_COMPILE_TIME_PRECISION
#include <boost/assert.hpp>
#else
#include <boost/static_assert.hpp>
#endif
namespace boost { namespace detail {
class lcast_abstract_stub {};
#ifndef BOOST_LCAST_NO_COMPILE_TIME_PRECISION
// Calculate an argument to pass to std::ios_base::precision from
// lexical_cast. See alternative implementation for broken standard
// libraries in lcast_get_precision below. Keep them in sync, please.
template<class T>
struct lcast_precision
{
#ifdef BOOST_NO_IS_ABSTRACT
typedef std::numeric_limits<T> limits; // No fix for SF:1358600.
#else
typedef BOOST_DEDUCED_TYPENAME boost::conditional<
boost::is_abstract<T>::value
, std::numeric_limits<lcast_abstract_stub>
, std::numeric_limits<T>
>::type limits;
#endif
BOOST_STATIC_CONSTANT(bool, use_default_precision =
!limits::is_specialized || limits::is_exact
);
BOOST_STATIC_CONSTANT(bool, is_specialized_bin =
!use_default_precision &&
limits::radix == 2 && limits::digits > 0
);
BOOST_STATIC_CONSTANT(bool, is_specialized_dec =
!use_default_precision &&
limits::radix == 10 && limits::digits10 > 0
);
BOOST_STATIC_CONSTANT(std::streamsize, streamsize_max =
boost::integer_traits<std::streamsize>::const_max
);
BOOST_STATIC_CONSTANT(unsigned int, precision_dec = limits::digits10 + 1U);
BOOST_STATIC_ASSERT(!is_specialized_dec ||
precision_dec <= streamsize_max + 0UL
);
BOOST_STATIC_CONSTANT(unsigned long, precision_bin =
2UL + limits::digits * 30103UL / 100000UL
);
BOOST_STATIC_ASSERT(!is_specialized_bin ||
(limits::digits + 0UL < ULONG_MAX / 30103UL &&
precision_bin > limits::digits10 + 0UL &&
precision_bin <= streamsize_max + 0UL)
);
BOOST_STATIC_CONSTANT(std::streamsize, value =
is_specialized_bin ? precision_bin
: is_specialized_dec ? precision_dec : 6
);
};
#endif
template<class T>
inline std::streamsize lcast_get_precision(T* = 0)
{
#ifndef BOOST_LCAST_NO_COMPILE_TIME_PRECISION
return lcast_precision<T>::value;
#else // Follow lcast_precision algorithm at run-time:
#ifdef BOOST_NO_IS_ABSTRACT
typedef std::numeric_limits<T> limits; // No fix for SF:1358600.
#else
typedef BOOST_DEDUCED_TYPENAME boost::conditional<
boost::is_abstract<T>::value
, std::numeric_limits<lcast_abstract_stub>
, std::numeric_limits<T>
>::type limits;
#endif
bool const use_default_precision =
!limits::is_specialized || limits::is_exact;
if(!use_default_precision)
{ // Includes all built-in floating-point types, float, double ...
// and UDT types for which digits (significand bits) is defined (not zero)
bool const is_specialized_bin =
limits::radix == 2 && limits::digits > 0;
bool const is_specialized_dec =
limits::radix == 10 && limits::digits10 > 0;
std::streamsize const streamsize_max =
(boost::integer_traits<std::streamsize>::max)();
(void)streamsize_max;
if(is_specialized_bin)
{ // Floating-point types with
// limits::digits defined by the specialization.
unsigned long const digits = limits::digits;
unsigned long const precision = 2UL + digits * 30103UL / 100000UL;
// unsigned long is selected because it is at least 32-bits
// and thus ULONG_MAX / 30103UL is big enough for all types.
BOOST_ASSERT(
digits < ULONG_MAX / 30103UL &&
precision > limits::digits10 + 0UL &&
precision <= streamsize_max + 0UL
);
return precision;
}
else if(is_specialized_dec)
{ // Decimal Floating-point type, most likely a User Defined Type
// rather than a real floating-point hardware type.
unsigned int const precision = limits::digits10 + 1U;
BOOST_ASSERT(precision <= streamsize_max + 0UL);
return precision;
}
}
// Integral type (for which precision has no effect)
// or type T for which limits is NOT specialized,
// so assume stream precision remains the default 6 decimal digits.
// Warning: if your User-defined Floating-point type T is NOT specialized,
// then you may lose accuracy by only using 6 decimal digits.
// To avoid this, you need to specialize T with either
// radix == 2 and digits == the number of significand bits,
// OR
// radix = 10 and digits10 == the number of decimal digits.
return 6;
#endif
}
template<class T>
inline void lcast_set_precision(std::ios_base& stream, T*)
{
stream.precision(lcast_get_precision<T>());
}
template<class Source, class Target>
inline void lcast_set_precision(std::ios_base& stream, Source*, Target*)
{
std::streamsize const s = lcast_get_precision(static_cast<Source*>(0));
std::streamsize const t = lcast_get_precision(static_cast<Target*>(0));
stream.precision(s > t ? s : t);
}
}}
#endif // BOOST_DETAIL_LCAST_PRECISION_HPP_INCLUDED

105
externals/vcpkg/packages/boost-lexical-cast_x64-windows/include/boost/lexical_cast.hpp vendored Executable file
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// Copyright Kevlin Henney, 2000-2005.
// Copyright Alexander Nasonov, 2006-2010.
// Copyright Antony Polukhin, 2011-2022.
//
// 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_INCLUDED
#define BOOST_LEXICAL_CAST_INCLUDED
#include <boost/config.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
# pragma once
#endif
#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
#define BOOST_LCAST_NO_WCHAR_T
#endif
#include <boost/range/iterator_range_core.hpp>
#include <boost/lexical_cast/bad_lexical_cast.hpp>
#include <boost/lexical_cast/try_lexical_convert.hpp>
namespace boost
{
template <typename Target, typename Source>
inline Target lexical_cast(const Source &arg)
{
Target result = Target();
if (!boost::conversion::detail::try_lexical_convert(arg, result)) {
boost::conversion::detail::throw_bad_cast<Source, Target>();
}
return result;
}
template <typename Target>
inline Target lexical_cast(const char* chars, std::size_t count)
{
return ::boost::lexical_cast<Target>(
::boost::iterator_range<const char*>(chars, chars + count)
);
}
template <typename Target>
inline Target lexical_cast(const unsigned char* chars, std::size_t count)
{
return ::boost::lexical_cast<Target>(
::boost::iterator_range<const unsigned char*>(chars, chars + count)
);
}
template <typename Target>
inline Target lexical_cast(const signed char* chars, std::size_t count)
{
return ::boost::lexical_cast<Target>(
::boost::iterator_range<const signed char*>(chars, chars + count)
);
}
#ifndef BOOST_LCAST_NO_WCHAR_T
template <typename Target>
inline Target lexical_cast(const wchar_t* chars, std::size_t count)
{
return ::boost::lexical_cast<Target>(
::boost::iterator_range<const wchar_t*>(chars, chars + count)
);
}
#endif
#ifndef BOOST_NO_CXX11_CHAR16_T
template <typename Target>
inline Target lexical_cast(const char16_t* chars, std::size_t count)
{
return ::boost::lexical_cast<Target>(
::boost::iterator_range<const char16_t*>(chars, chars + count)
);
}
#endif
#ifndef BOOST_NO_CXX11_CHAR32_T
template <typename Target>
inline Target lexical_cast(const char32_t* chars, std::size_t count)
{
return ::boost::lexical_cast<Target>(
::boost::iterator_range<const char32_t*>(chars, chars + count)
);
}
#endif
} // namespace boost
#undef BOOST_LCAST_NO_WCHAR_T
#endif // BOOST_LEXICAL_CAST_INCLUDED

106
externals/vcpkg/packages/boost-lexical-cast_x64-windows/include/boost/lexical_cast/bad_lexical_cast.hpp vendored Executable file
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// Copyright Kevlin Henney, 2000-2005.
// Copyright Alexander Nasonov, 2006-2010.
// Copyright Antony Polukhin, 2011-2022.
//
// 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

498
externals/vcpkg/packages/boost-lexical-cast_x64-windows/include/boost/lexical_cast/detail/converter_lexical.hpp vendored Executable file
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// Copyright Kevlin Henney, 2000-2005.
// Copyright Alexander Nasonov, 2006-2010.
// Copyright Antony Polukhin, 2011-2022.
//
// 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_DETAIL_CONVERTER_LEXICAL_HPP
#define BOOST_LEXICAL_CAST_DETAIL_CONVERTER_LEXICAL_HPP
#include <boost/config.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
# pragma once
#endif
#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
#define BOOST_LCAST_NO_WCHAR_T
#endif
#include <cstddef>
#include <string>
#include <boost/limits.hpp>
#include <boost/type_traits/integral_constant.hpp>
#include <boost/type_traits/type_identity.hpp>
#include <boost/type_traits/conditional.hpp>
#include <boost/type_traits/is_integral.hpp>
#include <boost/type_traits/is_float.hpp>
#include <boost/type_traits/has_left_shift.hpp>
#include <boost/type_traits/has_right_shift.hpp>
#include <boost/static_assert.hpp>
#include <boost/detail/lcast_precision.hpp>
#include <boost/lexical_cast/detail/widest_char.hpp>
#include <boost/lexical_cast/detail/is_character.hpp>
#ifndef BOOST_NO_CXX11_HDR_ARRAY
#include <array>
#endif
#include <boost/array.hpp>
#include <boost/range/iterator_range_core.hpp>
#include <boost/container/container_fwd.hpp>
#include <boost/lexical_cast/detail/converter_lexical_streams.hpp>
namespace boost {
namespace detail // normalize_single_byte_char<Char>
{
// Converts signed/unsigned char to char
template < class Char >
struct normalize_single_byte_char
{
typedef Char type;
};
template <>
struct normalize_single_byte_char< signed char >
{
typedef char type;
};
template <>
struct normalize_single_byte_char< unsigned char >
{
typedef char type;
};
}
namespace detail // deduce_character_type_later<T>
{
// Helper type, meaning that stram character for T must be deduced
// at Stage 2 (See deduce_source_char<T> and deduce_target_char<T>)
template < class T > struct deduce_character_type_later {};
}
namespace detail // stream_char_common<T>
{
// Selectors to choose stream character type (common for Source and Target)
// Returns one of char, wchar_t, char16_t, char32_t or deduce_character_type_later<T> types
// Executed on Stage 1 (See deduce_source_char<T> and deduce_target_char<T>)
template < typename Type >
struct stream_char_common: public boost::conditional<
boost::detail::is_character< Type >::value,
Type,
boost::detail::deduce_character_type_later< Type >
> {};
template < typename Char >
struct stream_char_common< Char* >: public boost::conditional<
boost::detail::is_character< Char >::value,
Char,
boost::detail::deduce_character_type_later< Char* >
> {};
template < typename Char >
struct stream_char_common< const Char* >: public boost::conditional<
boost::detail::is_character< Char >::value,
Char,
boost::detail::deduce_character_type_later< const Char* >
> {};
template < typename Char >
struct stream_char_common< boost::iterator_range< Char* > >: public boost::conditional<
boost::detail::is_character< Char >::value,
Char,
boost::detail::deduce_character_type_later< boost::iterator_range< Char* > >
> {};
template < typename Char >
struct stream_char_common< boost::iterator_range< const Char* > >: public boost::conditional<
boost::detail::is_character< Char >::value,
Char,
boost::detail::deduce_character_type_later< boost::iterator_range< const Char* > >
> {};
template < class Char, class Traits, class Alloc >
struct stream_char_common< std::basic_string< Char, Traits, Alloc > >
{
typedef Char type;
};
template < class Char, class Traits, class Alloc >
struct stream_char_common< boost::container::basic_string< Char, Traits, Alloc > >
{
typedef Char type;
};
template < typename Char, std::size_t N >
struct stream_char_common< boost::array< Char, N > >: public boost::conditional<
boost::detail::is_character< Char >::value,
Char,
boost::detail::deduce_character_type_later< boost::array< Char, N > >
> {};
template < typename Char, std::size_t N >
struct stream_char_common< boost::array< const Char, N > >: public boost::conditional<
boost::detail::is_character< Char >::value,
Char,
boost::detail::deduce_character_type_later< boost::array< const Char, N > >
> {};
#ifndef BOOST_NO_CXX11_HDR_ARRAY
template < typename Char, std::size_t N >
struct stream_char_common< std::array<Char, N > >: public boost::conditional<
boost::detail::is_character< Char >::value,
Char,
boost::detail::deduce_character_type_later< std::array< Char, N > >
> {};
template < typename Char, std::size_t N >
struct stream_char_common< std::array< const Char, N > >: public boost::conditional<
boost::detail::is_character< Char >::value,
Char,
boost::detail::deduce_character_type_later< std::array< const Char, N > >
> {};
#endif
#ifdef BOOST_HAS_INT128
template <> struct stream_char_common< boost::int128_type >: public boost::type_identity< char > {};
template <> struct stream_char_common< boost::uint128_type >: public boost::type_identity< char > {};
#endif
#if !defined(BOOST_LCAST_NO_WCHAR_T) && defined(BOOST_NO_INTRINSIC_WCHAR_T)
template <>
struct stream_char_common< wchar_t >
{
typedef char type;
};
#endif
}
namespace detail // deduce_source_char_impl<T>
{
// If type T is `deduce_character_type_later` type, then tries to deduce
// character type using boost::has_left_shift<T> metafunction.
// Otherwise supplied type T is a character type, that must be normalized
// using normalize_single_byte_char<Char>.
// Executed at Stage 2 (See deduce_source_char<T> and deduce_target_char<T>)
template < class Char >
struct deduce_source_char_impl
{
typedef BOOST_DEDUCED_TYPENAME boost::detail::normalize_single_byte_char< Char >::type type;
};
template < class T >
struct deduce_source_char_impl< deduce_character_type_later< T > >
{
typedef boost::has_left_shift< std::basic_ostream< char >, T > result_t;
#if defined(BOOST_LCAST_NO_WCHAR_T)
BOOST_STATIC_ASSERT_MSG((result_t::value),
"Source type is not std::ostream`able and std::wostream`s are not supported by your STL implementation");
typedef char type;
#else
typedef BOOST_DEDUCED_TYPENAME boost::conditional<
result_t::value, char, wchar_t
>::type type;
BOOST_STATIC_ASSERT_MSG((result_t::value || boost::has_left_shift< std::basic_ostream< type >, T >::value),
"Source type is neither std::ostream`able nor std::wostream`able");
#endif
};
}
namespace detail // deduce_target_char_impl<T>
{
// If type T is `deduce_character_type_later` type, then tries to deduce
// character type using boost::has_right_shift<T> metafunction.
// Otherwise supplied type T is a character type, that must be normalized
// using normalize_single_byte_char<Char>.
// Executed at Stage 2 (See deduce_source_char<T> and deduce_target_char<T>)
template < class Char >
struct deduce_target_char_impl
{
typedef BOOST_DEDUCED_TYPENAME normalize_single_byte_char< Char >::type type;
};
template < class T >
struct deduce_target_char_impl< deduce_character_type_later<T> >
{
typedef boost::has_right_shift<std::basic_istream<char>, T > result_t;
#if defined(BOOST_LCAST_NO_WCHAR_T)
BOOST_STATIC_ASSERT_MSG((result_t::value),
"Target type is not std::istream`able and std::wistream`s are not supported by your STL implementation");
typedef char type;
#else
typedef BOOST_DEDUCED_TYPENAME boost::conditional<
result_t::value, char, wchar_t
>::type type;
BOOST_STATIC_ASSERT_MSG((result_t::value || boost::has_right_shift<std::basic_istream<wchar_t>, T >::value),
"Target type is neither std::istream`able nor std::wistream`able");
#endif
};
}
namespace detail // deduce_target_char<T> and deduce_source_char<T>
{
// We deduce stream character types in two stages.
//
// Stage 1 is common for Target and Source. At Stage 1 we get
// non normalized character type (may contain unsigned/signed char)
// or deduce_character_type_later<T> where T is the original type.
// Stage 1 is executed by stream_char_common<T>
//
// At Stage 2 we normalize character types or try to deduce character
// type using metafunctions.
// Stage 2 is executed by deduce_target_char_impl<T> and
// deduce_source_char_impl<T>
//
// deduce_target_char<T> and deduce_source_char<T> functions combine
// both stages
template < class T >
struct deduce_target_char
{
typedef BOOST_DEDUCED_TYPENAME stream_char_common< T >::type stage1_type;
typedef BOOST_DEDUCED_TYPENAME deduce_target_char_impl< stage1_type >::type stage2_type;
typedef stage2_type type;
};
template < class T >
struct deduce_source_char
{
typedef BOOST_DEDUCED_TYPENAME stream_char_common< T >::type stage1_type;
typedef BOOST_DEDUCED_TYPENAME deduce_source_char_impl< stage1_type >::type stage2_type;
typedef stage2_type type;
};
}
namespace detail // extract_char_traits template
{
// We are attempting to get char_traits<> from T
// template parameter. Otherwise we'll be using std::char_traits<Char>
template < class Char, class T >
struct extract_char_traits
: boost::false_type
{
typedef std::char_traits< Char > trait_t;
};
template < class Char, class Traits, class Alloc >
struct extract_char_traits< Char, std::basic_string< Char, Traits, Alloc > >
: boost::true_type
{
typedef Traits trait_t;
};
template < class Char, class Traits, class Alloc>
struct extract_char_traits< Char, boost::container::basic_string< Char, Traits, Alloc > >
: boost::true_type
{
typedef Traits trait_t;
};
}
namespace detail // array_to_pointer_decay<T>
{
template<class T>
struct array_to_pointer_decay
{
typedef T type;
};
template<class T, std::size_t N>
struct array_to_pointer_decay<T[N]>
{
typedef const T * type;
};
}
namespace detail // lcast_src_length
{
// Return max. length of string representation of Source;
template< class Source, // Source type of lexical_cast.
class Enable = void // helper type
>
struct lcast_src_length
{
BOOST_STATIC_CONSTANT(std::size_t, value = 1);
};
// Helper for integral types.
// Notes on length calculation:
// Max length for 32bit int with grouping "\1" and thousands_sep ',':
// "-2,1,4,7,4,8,3,6,4,7"
// ^ - is_signed
// ^ - 1 digit not counted by digits10
// ^^^^^^^^^^^^^^^^^^ - digits10 * 2
//
// Constant is_specialized is used instead of constant 1
// to prevent buffer overflow in a rare case when
// <boost/limits.hpp> doesn't add missing specialization for
// numeric_limits<T> for some integral type T.
// When is_specialized is false, the whole expression is 0.
template <class Source>
struct lcast_src_length<
Source, BOOST_DEDUCED_TYPENAME boost::enable_if<boost::is_integral<Source> >::type
>
{
#ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
BOOST_STATIC_CONSTANT(std::size_t, value =
std::numeric_limits<Source>::is_signed +
std::numeric_limits<Source>::is_specialized + /* == 1 */
std::numeric_limits<Source>::digits10 * 2
);
#else
BOOST_STATIC_CONSTANT(std::size_t, value = 156);
BOOST_STATIC_ASSERT(sizeof(Source) * CHAR_BIT <= 256);
#endif
};
// Helper for floating point types.
// -1.23456789e-123456
// ^ sign
// ^ leading digit
// ^ decimal point
// ^^^^^^^^ lcast_precision<Source>::value
// ^ "e"
// ^ exponent sign
// ^^^^^^ exponent (assumed 6 or less digits)
// sign + leading digit + decimal point + "e" + exponent sign == 5
template<class Source>
struct lcast_src_length<
Source, BOOST_DEDUCED_TYPENAME boost::enable_if<boost::is_float<Source> >::type
>
{
#ifndef BOOST_LCAST_NO_COMPILE_TIME_PRECISION
BOOST_STATIC_ASSERT(
std::numeric_limits<Source>::max_exponent10 <= 999999L &&
std::numeric_limits<Source>::min_exponent10 >= -999999L
);
BOOST_STATIC_CONSTANT(std::size_t, value =
5 + lcast_precision<Source>::value + 6
);
#else // #ifndef BOOST_LCAST_NO_COMPILE_TIME_PRECISION
BOOST_STATIC_CONSTANT(std::size_t, value = 156);
#endif // #ifndef BOOST_LCAST_NO_COMPILE_TIME_PRECISION
};
}
namespace detail // lexical_cast_stream_traits<Source, Target>
{
template <class Source, class Target>
struct lexical_cast_stream_traits {
typedef BOOST_DEDUCED_TYPENAME boost::detail::array_to_pointer_decay<Source>::type src;
typedef BOOST_DEDUCED_TYPENAME boost::remove_cv<src>::type no_cv_src;
typedef boost::detail::deduce_source_char<no_cv_src> deduce_src_char_metafunc;
typedef BOOST_DEDUCED_TYPENAME deduce_src_char_metafunc::type src_char_t;
typedef BOOST_DEDUCED_TYPENAME boost::detail::deduce_target_char<Target>::type target_char_t;
typedef BOOST_DEDUCED_TYPENAME boost::detail::widest_char<
target_char_t, src_char_t
>::type char_type;
#if !defined(BOOST_NO_CXX11_CHAR16_T) && defined(BOOST_NO_CXX11_UNICODE_LITERALS)
BOOST_STATIC_ASSERT_MSG(( !boost::is_same<char16_t, src_char_t>::value
&& !boost::is_same<char16_t, target_char_t>::value),
"Your compiler does not have full support for char16_t" );
#endif
#if !defined(BOOST_NO_CXX11_CHAR32_T) && defined(BOOST_NO_CXX11_UNICODE_LITERALS)
BOOST_STATIC_ASSERT_MSG(( !boost::is_same<char32_t, src_char_t>::value
&& !boost::is_same<char32_t, target_char_t>::value),
"Your compiler does not have full support for char32_t" );
#endif
typedef BOOST_DEDUCED_TYPENAME boost::conditional<
boost::detail::extract_char_traits<char_type, Target>::value,
BOOST_DEDUCED_TYPENAME boost::detail::extract_char_traits<char_type, Target>,
BOOST_DEDUCED_TYPENAME boost::detail::extract_char_traits<char_type, no_cv_src>
>::type::trait_t traits;
typedef boost::integral_constant<
bool,
boost::is_same<char, src_char_t>::value && // source is not a wide character based type
(sizeof(char) != sizeof(target_char_t)) && // target type is based on wide character
(!(boost::detail::is_character<no_cv_src>::value))
> is_string_widening_required_t;
typedef boost::integral_constant<
bool,
!(boost::is_integral<no_cv_src>::value ||
boost::detail::is_character<
BOOST_DEDUCED_TYPENAME deduce_src_char_metafunc::stage1_type // if we did not get character type at stage1
>::value // then we have no optimization for that type
)
> is_source_input_not_optimized_t;
// If we have an optimized conversion for
// Source, we do not need to construct stringbuf.
BOOST_STATIC_CONSTANT(bool, requires_stringbuf =
(is_string_widening_required_t::value || is_source_input_not_optimized_t::value)
);
typedef boost::detail::lcast_src_length<no_cv_src> len_t;
};
}
namespace detail
{
template<typename Target, typename Source>
struct lexical_converter_impl
{
typedef lexical_cast_stream_traits<Source, Target> stream_trait;
typedef detail::lexical_istream_limited_src<
BOOST_DEDUCED_TYPENAME stream_trait::char_type,
BOOST_DEDUCED_TYPENAME stream_trait::traits,
stream_trait::requires_stringbuf,
stream_trait::len_t::value + 1
> i_interpreter_type;
typedef detail::lexical_ostream_limited_src<
BOOST_DEDUCED_TYPENAME stream_trait::char_type,
BOOST_DEDUCED_TYPENAME stream_trait::traits
> o_interpreter_type;
static inline bool try_convert(const Source& arg, Target& result) {
i_interpreter_type i_interpreter;
// Disabling ADL, by directly specifying operators.
if (!(i_interpreter.operator <<(arg)))
return false;
o_interpreter_type out(i_interpreter.cbegin(), i_interpreter.cend());
// Disabling ADL, by directly specifying operators.
if(!(out.operator >>(result)))
return false;
return true;
}
};
}
} // namespace boost
#undef BOOST_LCAST_NO_WCHAR_T
#endif // BOOST_LEXICAL_CAST_DETAIL_CONVERTER_LEXICAL_HPP

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externals/vcpkg/packages/boost-lexical-cast_x64-windows/include/boost/lexical_cast/detail/converter_lexical_streams.hpp vendored Executable file
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// Copyright Kevlin Henney, 2000-2005.
// Copyright Alexander Nasonov, 2006-2010.
// Copyright Antony Polukhin, 2011-2022.
//
// 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, Nowember 2016
#ifndef BOOST_LEXICAL_CAST_DETAIL_CONVERTER_LEXICAL_STREAMS_HPP
#define BOOST_LEXICAL_CAST_DETAIL_CONVERTER_LEXICAL_STREAMS_HPP
#include <boost/config.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
# pragma once
#endif
#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
#define BOOST_LCAST_NO_WCHAR_T
#endif
#include <cstddef>
#include <string>
#include <cstring>
#include <cstdio>
#include <boost/limits.hpp>
#include <boost/type_traits/conditional.hpp>
#include <boost/type_traits/is_pointer.hpp>
#include <boost/static_assert.hpp>
#include <boost/detail/lcast_precision.hpp>
#include <boost/detail/workaround.hpp>
#ifndef BOOST_NO_STD_LOCALE
# include <locale>
#else
# ifndef BOOST_LEXICAL_CAST_ASSUME_C_LOCALE
// Getting error at this point means, that your STL library is old/lame/misconfigured.
// If nothing can be done with STL library, define BOOST_LEXICAL_CAST_ASSUME_C_LOCALE,
// but beware: lexical_cast will understand only 'C' locale delimeters and thousands
// separators.
# error "Unable to use <locale> header. Define BOOST_LEXICAL_CAST_ASSUME_C_LOCALE to force "
# error "boost::lexical_cast to use only 'C' locale during conversions."
# endif
#endif
#ifdef BOOST_NO_STRINGSTREAM
#include <strstream>
#else
#include <sstream>
#endif
#include <boost/lexical_cast/detail/lcast_char_constants.hpp>
#include <boost/lexical_cast/detail/lcast_unsigned_converters.hpp>
#include <boost/lexical_cast/detail/inf_nan.hpp>
#include <istream>
#ifndef BOOST_NO_CXX11_HDR_ARRAY
#include <array>
#endif
#include <boost/array.hpp>
#include <boost/type_traits/make_unsigned.hpp>
#include <boost/type_traits/is_integral.hpp>
#include <boost/type_traits/is_float.hpp>
#include <boost/range/iterator_range_core.hpp>
#include <boost/container/container_fwd.hpp>
#include <boost/integer.hpp>
#include <boost/detail/basic_pointerbuf.hpp>
#include <boost/noncopyable.hpp>
#ifndef BOOST_NO_CWCHAR
# include <cwchar>
#endif
namespace boost {
namespace detail // basic_unlockedbuf
{
// acts as a stream buffer which wraps around a pair of pointers
// and gives acces to internals
template <class BufferType, class CharT>
class basic_unlockedbuf : public basic_pointerbuf<CharT, BufferType> {
public:
typedef basic_pointerbuf<CharT, BufferType> base_type;
typedef BOOST_DEDUCED_TYPENAME base_type::streamsize streamsize;
#ifndef BOOST_NO_USING_TEMPLATE
using base_type::pptr;
using base_type::pbase;
using base_type::setbuf;
#else
charT* pptr() const { return base_type::pptr(); }
charT* pbase() const { return base_type::pbase(); }
BufferType* setbuf(char_type* s, streamsize n) { return base_type::setbuf(s, n); }
#endif
};
}
namespace detail
{
struct do_not_construct_out_buffer_t{};
struct do_not_construct_out_stream_t{
do_not_construct_out_stream_t(do_not_construct_out_buffer_t*){}
};
template <class CharT, class Traits>
struct out_stream_helper_trait {
#if defined(BOOST_NO_STRINGSTREAM)
typedef std::ostream out_stream_t;
typedef basic_unlockedbuf<std::strstreambuf, char> stringbuffer_t;
#elif defined(BOOST_NO_STD_LOCALE)
typedef std::ostream out_stream_t;
typedef basic_unlockedbuf<std::stringbuf, char> stringbuffer_t;
typedef basic_unlockedbuf<std::streambuf, char> buffer_t;
#else
typedef std::basic_ostream<CharT, Traits> out_stream_t;
typedef basic_unlockedbuf<std::basic_stringbuf<CharT, Traits>, CharT> stringbuffer_t;
typedef basic_unlockedbuf<std::basic_streambuf<CharT, Traits>, CharT> buffer_t;
#endif
};
}
namespace detail // optimized stream wrappers
{
template< class CharT // a result of widest_char transformation
, class Traits
, bool RequiresStringbuffer
, std::size_t CharacterBufferSize
>
class lexical_istream_limited_src: boost::noncopyable {
typedef BOOST_DEDUCED_TYPENAME boost::conditional<
RequiresStringbuffer,
BOOST_DEDUCED_TYPENAME out_stream_helper_trait<CharT, Traits>::out_stream_t,
do_not_construct_out_stream_t
>::type deduced_out_stream_t;
typedef BOOST_DEDUCED_TYPENAME boost::conditional<
RequiresStringbuffer,
BOOST_DEDUCED_TYPENAME out_stream_helper_trait<CharT, Traits>::stringbuffer_t,
do_not_construct_out_buffer_t
>::type deduced_out_buffer_t;
deduced_out_buffer_t out_buffer;
deduced_out_stream_t out_stream;
CharT buffer[CharacterBufferSize];
// After the `operator <<` finishes, `[start, finish)` is
// the range to output by `operator >>`
const CharT* start;
const CharT* finish;
public:
lexical_istream_limited_src() BOOST_NOEXCEPT
: out_buffer()
, out_stream(&out_buffer)
, start(buffer)
, finish(buffer + CharacterBufferSize)
{}
const CharT* cbegin() const BOOST_NOEXCEPT {
return start;
}
const CharT* cend() const BOOST_NOEXCEPT {
return finish;
}
private:
/************************************ HELPER FUNCTIONS FOR OPERATORS << ( ... ) ********************************/
bool shl_char(CharT ch) BOOST_NOEXCEPT {
Traits::assign(buffer[0], ch);
finish = start + 1;
return true;
}
#ifndef BOOST_LCAST_NO_WCHAR_T
template <class T>
bool shl_char(T ch) {
BOOST_STATIC_ASSERT_MSG(( sizeof(T) <= sizeof(CharT)) ,
"boost::lexical_cast does not support narrowing of char types."
"Use boost::locale instead" );
#ifndef BOOST_LEXICAL_CAST_ASSUME_C_LOCALE
std::locale loc;
CharT const w = BOOST_USE_FACET(std::ctype<CharT>, loc).widen(ch);
#else
CharT const w = static_cast<CharT>(ch);
#endif
Traits::assign(buffer[0], w);
finish = start + 1;
return true;
}
#endif
bool shl_char_array(CharT const* str_value) BOOST_NOEXCEPT {
start = str_value;
finish = start + Traits::length(str_value);
return true;
}
template <class T>
bool shl_char_array(T const* str_value) {
BOOST_STATIC_ASSERT_MSG(( sizeof(T) <= sizeof(CharT)),
"boost::lexical_cast does not support narrowing of char types."
"Use boost::locale instead" );
return shl_input_streamable(str_value);
}
bool shl_char_array_limited(CharT const* str, std::size_t max_size) BOOST_NOEXCEPT {
start = str;
finish = std::find(start, start + max_size, Traits::to_char_type(0));
return true;
}
template<typename InputStreamable>
bool shl_input_streamable(InputStreamable& input) {
#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_LOCALE)
// If you have compilation error at this point, than your STL library
// does not support such conversions. Try updating it.
BOOST_STATIC_ASSERT((boost::is_same<char, CharT>::value));
#endif
#ifndef BOOST_NO_EXCEPTIONS
out_stream.exceptions(std::ios::badbit);
try {
#endif
bool const result = !(out_stream << input).fail();
const deduced_out_buffer_t* const p = static_cast<deduced_out_buffer_t*>(
out_stream.rdbuf()
);
start = p->pbase();
finish = p->pptr();
return result;
#ifndef BOOST_NO_EXCEPTIONS
} catch (const ::std::ios_base::failure& /*f*/) {
return false;
}
#endif
}
template <class T>
inline bool shl_unsigned(const T n) {
CharT* tmp_finish = buffer + CharacterBufferSize;
start = lcast_put_unsigned<Traits, T, CharT>(n, tmp_finish).convert();
finish = tmp_finish;
return true;
}
template <class T>
inline bool shl_signed(const T n) {
CharT* tmp_finish = buffer + CharacterBufferSize;
typedef BOOST_DEDUCED_TYPENAME boost::make_unsigned<T>::type utype;
CharT* tmp_start = lcast_put_unsigned<Traits, utype, CharT>(lcast_to_unsigned(n), tmp_finish).convert();
if (n < 0) {
--tmp_start;
CharT const minus = lcast_char_constants<CharT>::minus;
Traits::assign(*tmp_start, minus);
}
start = tmp_start;
finish = tmp_finish;
return true;
}
template <class T, class SomeCharT>
bool shl_real_type(const T& val, SomeCharT* /*begin*/) {
lcast_set_precision(out_stream, &val);
return shl_input_streamable(val);
}
bool shl_real_type(float val, char* begin) {
using namespace std;
const double val_as_double = val;
finish = start +
#if defined(_MSC_VER) && (_MSC_VER >= 1400) && !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
sprintf_s(begin, CharacterBufferSize,
#else
sprintf(begin,
#endif
"%.*g", static_cast<int>(boost::detail::lcast_get_precision<float>()), val_as_double);
return finish > start;
}
bool shl_real_type(double val, char* begin) {
using namespace std;
finish = start +
#if defined(_MSC_VER) && (_MSC_VER >= 1400) && !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
sprintf_s(begin, CharacterBufferSize,
#else
sprintf(begin,
#endif
"%.*g", static_cast<int>(boost::detail::lcast_get_precision<double>()), val);
return finish > start;
}
#ifndef __MINGW32__
bool shl_real_type(long double val, char* begin) {
using namespace std;
finish = start +
#if defined(_MSC_VER) && (_MSC_VER >= 1400) && !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
sprintf_s(begin, CharacterBufferSize,
#else
sprintf(begin,
#endif
"%.*Lg", static_cast<int>(boost::detail::lcast_get_precision<long double>()), val );
return finish > start;
}
#endif
#if !defined(BOOST_LCAST_NO_WCHAR_T) && !defined(BOOST_NO_SWPRINTF) && !defined(__MINGW32__)
bool shl_real_type(float val, wchar_t* begin) {
using namespace std;
const double val_as_double = val;
finish = start + swprintf(begin, CharacterBufferSize,
L"%.*g",
static_cast<int>(boost::detail::lcast_get_precision<float >()),
val_as_double );
return finish > start;
}
bool shl_real_type(double val, wchar_t* begin) {
using namespace std;
finish = start + swprintf(begin, CharacterBufferSize,
L"%.*g", static_cast<int>(boost::detail::lcast_get_precision<double >()), val );
return finish > start;
}
bool shl_real_type(long double val, wchar_t* begin) {
using namespace std;
finish = start + swprintf(begin, CharacterBufferSize,
L"%.*Lg", static_cast<int>(boost::detail::lcast_get_precision<long double >()), val );
return finish > start;
}
#endif
template <class T>
bool shl_real(T val) {
CharT* tmp_finish = buffer + CharacterBufferSize;
if (put_inf_nan(buffer, tmp_finish, val)) {
finish = tmp_finish;
return true;
}
return shl_real_type(val, static_cast<CharT*>(buffer));
}
/************************************ OPERATORS << ( ... ) ********************************/
public:
template<class Alloc>
bool operator<<(std::basic_string<CharT,Traits,Alloc> const& str) BOOST_NOEXCEPT {
start = str.data();
finish = start + str.length();
return true;
}
template<class Alloc>
bool operator<<(boost::container::basic_string<CharT,Traits,Alloc> const& str) BOOST_NOEXCEPT {
start = str.data();
finish = start + str.length();
return true;
}
bool operator<<(bool value) BOOST_NOEXCEPT {
CharT const czero = lcast_char_constants<CharT>::zero;
Traits::assign(buffer[0], Traits::to_char_type(czero + value));
finish = start + 1;
return true;
}
template <class C>
BOOST_DEDUCED_TYPENAME boost::disable_if<boost::is_const<C>, bool>::type
operator<<(const iterator_range<C*>& rng) BOOST_NOEXCEPT {
return (*this) << iterator_range<const C*>(rng.begin(), rng.end());
}
bool operator<<(const iterator_range<const CharT*>& rng) BOOST_NOEXCEPT {
start = rng.begin();
finish = rng.end();
return true;
}
bool operator<<(const iterator_range<const signed char*>& rng) BOOST_NOEXCEPT {
return (*this) << iterator_range<const char*>(
reinterpret_cast<const char*>(rng.begin()),
reinterpret_cast<const char*>(rng.end())
);
}
bool operator<<(const iterator_range<const unsigned char*>& rng) BOOST_NOEXCEPT {
return (*this) << iterator_range<const char*>(
reinterpret_cast<const char*>(rng.begin()),
reinterpret_cast<const char*>(rng.end())
);
}
bool operator<<(char ch) { return shl_char(ch); }
bool operator<<(unsigned char ch) { return ((*this) << static_cast<char>(ch)); }
bool operator<<(signed char ch) { return ((*this) << static_cast<char>(ch)); }
#if !defined(BOOST_LCAST_NO_WCHAR_T)
bool operator<<(wchar_t const* str) { return shl_char_array(str); }
bool operator<<(wchar_t * str) { return shl_char_array(str); }
#ifndef BOOST_NO_INTRINSIC_WCHAR_T
bool operator<<(wchar_t ch) { return shl_char(ch); }
#endif
#endif
#if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS)
bool operator<<(char16_t ch) { return shl_char(ch); }
bool operator<<(char16_t * str) { return shl_char_array(str); }
bool operator<<(char16_t const * str) { return shl_char_array(str); }
#endif
#if !defined(BOOST_NO_CXX11_CHAR32_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS)
bool operator<<(char32_t ch) { return shl_char(ch); }
bool operator<<(char32_t * str) { return shl_char_array(str); }
bool operator<<(char32_t const * str) { return shl_char_array(str); }
#endif
bool operator<<(unsigned char const* ch) { return ((*this) << reinterpret_cast<char const*>(ch)); }
bool operator<<(unsigned char * ch) { return ((*this) << reinterpret_cast<char *>(ch)); }
bool operator<<(signed char const* ch) { return ((*this) << reinterpret_cast<char const*>(ch)); }
bool operator<<(signed char * ch) { return ((*this) << reinterpret_cast<char *>(ch)); }
bool operator<<(char const* str_value) { return shl_char_array(str_value); }
bool operator<<(char* str_value) { return shl_char_array(str_value); }
bool operator<<(short n) { return shl_signed(n); }
bool operator<<(int n) { return shl_signed(n); }
bool operator<<(long n) { return shl_signed(n); }
bool operator<<(unsigned short n) { return shl_unsigned(n); }
bool operator<<(unsigned int n) { return shl_unsigned(n); }
bool operator<<(unsigned long n) { return shl_unsigned(n); }
#if defined(BOOST_HAS_LONG_LONG)
bool operator<<(boost::ulong_long_type n) { return shl_unsigned(n); }
bool operator<<(boost::long_long_type n) { return shl_signed(n); }
#elif defined(BOOST_HAS_MS_INT64)
bool operator<<(unsigned __int64 n) { return shl_unsigned(n); }
bool operator<<( __int64 n) { return shl_signed(n); }
#endif
#ifdef BOOST_HAS_INT128
bool operator<<(const boost::uint128_type& n) { return shl_unsigned(n); }
bool operator<<(const boost::int128_type& n) { return shl_signed(n); }
#endif
bool operator<<(float val) { return shl_real(val); }
bool operator<<(double val) { return shl_real(val); }
bool operator<<(long double val) {
#ifndef __MINGW32__
return shl_real(val);
#else
return shl_real(static_cast<double>(val));
#endif
}
// Adding constness to characters. Constness does not change layout
template <class C, std::size_t N>
BOOST_DEDUCED_TYPENAME boost::disable_if<boost::is_const<C>, bool>::type
operator<<(boost::array<C, N> const& input) BOOST_NOEXCEPT {
BOOST_STATIC_ASSERT_MSG(
(sizeof(boost::array<const C, N>) == sizeof(boost::array<C, N>)),
"boost::array<C, N> and boost::array<const C, N> must have exactly the same layout."
);
return ((*this) << reinterpret_cast<boost::array<const C, N> const& >(input));
}
template <std::size_t N>
bool operator<<(boost::array<const CharT, N> const& input) BOOST_NOEXCEPT {
return shl_char_array_limited(input.data(), N);
}
template <std::size_t N>
bool operator<<(boost::array<const unsigned char, N> const& input) BOOST_NOEXCEPT {
return ((*this) << reinterpret_cast<boost::array<const char, N> const& >(input));
}
template <std::size_t N>
bool operator<<(boost::array<const signed char, N> const& input) BOOST_NOEXCEPT {
return ((*this) << reinterpret_cast<boost::array<const char, N> const& >(input));
}
#ifndef BOOST_NO_CXX11_HDR_ARRAY
// Making a Boost.Array from std::array
template <class C, std::size_t N>
bool operator<<(std::array<C, N> const& input) BOOST_NOEXCEPT {
BOOST_STATIC_ASSERT_MSG(
(sizeof(std::array<C, N>) == sizeof(boost::array<C, N>)),
"std::array and boost::array must have exactly the same layout. "
"Bug in implementation of std::array or boost::array."
);
return ((*this) << reinterpret_cast<boost::array<C, N> const& >(input));
}
#endif
template <class InStreamable>
bool operator<<(const InStreamable& input) { return shl_input_streamable(input); }
};
template <class CharT, class Traits>
class lexical_ostream_limited_src: boost::noncopyable {
//`[start, finish)` is the range to output by `operator >>`
const CharT* start;
const CharT* const finish;
public:
lexical_ostream_limited_src(const CharT* begin, const CharT* end) BOOST_NOEXCEPT
: start(begin)
, finish(end)
{}
/************************************ HELPER FUNCTIONS FOR OPERATORS >> ( ... ) ********************************/
private:
template <typename Type>
bool shr_unsigned(Type& output) {
if (start == finish) return false;
CharT const minus = lcast_char_constants<CharT>::minus;
CharT const plus = lcast_char_constants<CharT>::plus;
bool const has_minus = Traits::eq(minus, *start);
/* We won`t use `start' any more, so no need in decrementing it after */
if (has_minus || Traits::eq(plus, *start)) {
++start;
}
bool const succeed = lcast_ret_unsigned<Traits, Type, CharT>(output, start, finish).convert();
if (has_minus) {
output = static_cast<Type>(0u - output);
}
return succeed;
}
template <typename Type>
bool shr_signed(Type& output) {
if (start == finish) return false;
CharT const minus = lcast_char_constants<CharT>::minus;
CharT const plus = lcast_char_constants<CharT>::plus;
typedef BOOST_DEDUCED_TYPENAME make_unsigned<Type>::type utype;
utype out_tmp = 0;
bool const has_minus = Traits::eq(minus, *start);
/* We won`t use `start' any more, so no need in decrementing it after */
if (has_minus || Traits::eq(plus, *start)) {
++start;
}
bool succeed = lcast_ret_unsigned<Traits, utype, CharT>(out_tmp, start, finish).convert();
if (has_minus) {
utype const comp_val = (static_cast<utype>(1) << std::numeric_limits<Type>::digits);
succeed = succeed && out_tmp<=comp_val;
output = static_cast<Type>(0u - out_tmp);
} else {
utype const comp_val = static_cast<utype>((std::numeric_limits<Type>::max)());
succeed = succeed && out_tmp<=comp_val;
output = static_cast<Type>(out_tmp);
}
return succeed;
}
template<typename InputStreamable>
bool shr_using_base_class(InputStreamable& output)
{
BOOST_STATIC_ASSERT_MSG(
(!boost::is_pointer<InputStreamable>::value),
"boost::lexical_cast can not convert to pointers"
);
#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_LOCALE)
BOOST_STATIC_ASSERT_MSG((boost::is_same<char, CharT>::value),
"boost::lexical_cast can not convert, because your STL library does not "
"support such conversions. Try updating it."
);
#endif
#if defined(BOOST_NO_STRINGSTREAM)
std::istrstream stream(start, static_cast<std::istrstream::streamsize>(finish - start));
#else
typedef BOOST_DEDUCED_TYPENAME out_stream_helper_trait<CharT, Traits>::buffer_t buffer_t;
buffer_t buf;
// Usually `istream` and `basic_istream` do not modify
// content of buffer; `buffer_t` assures that this is true
buf.setbuf(const_cast<CharT*>(start), static_cast<typename buffer_t::streamsize>(finish - start));
#if defined(BOOST_NO_STD_LOCALE)
std::istream stream(&buf);
#else
std::basic_istream<CharT, Traits> stream(&buf);
#endif // BOOST_NO_STD_LOCALE
#endif // BOOST_NO_STRINGSTREAM
#ifndef BOOST_NO_EXCEPTIONS
stream.exceptions(std::ios::badbit);
try {
#endif
stream.unsetf(std::ios::skipws);
lcast_set_precision(stream, static_cast<InputStreamable*>(0));
return (stream >> output)
&& (stream.get() == Traits::eof());
#ifndef BOOST_NO_EXCEPTIONS
} catch (const ::std::ios_base::failure& /*f*/) {
return false;
}
#endif
}
template<class T>
inline bool shr_xchar(T& output) BOOST_NOEXCEPT {
BOOST_STATIC_ASSERT_MSG(( sizeof(CharT) == sizeof(T) ),
"boost::lexical_cast does not support narrowing of character types."
"Use boost::locale instead" );
bool const ok = (finish - start == 1);
if (ok) {
CharT out;
Traits::assign(out, *start);
output = static_cast<T>(out);
}
return ok;
}
template <std::size_t N, class ArrayT>
bool shr_std_array(ArrayT& output) BOOST_NOEXCEPT {
using namespace std;
const std::size_t size = static_cast<std::size_t>(finish - start);
if (size > N - 1) { // `-1` because we need to store \0 at the end
return false;
}
memcpy(&output[0], start, size * sizeof(CharT));
output[size] = Traits::to_char_type(0);
return true;
}
/************************************ OPERATORS >> ( ... ) ********************************/
public:
bool operator>>(unsigned short& output) { return shr_unsigned(output); }
bool operator>>(unsigned int& output) { return shr_unsigned(output); }
bool operator>>(unsigned long int& output) { return shr_unsigned(output); }
bool operator>>(short& output) { return shr_signed(output); }
bool operator>>(int& output) { return shr_signed(output); }
bool operator>>(long int& output) { return shr_signed(output); }
#if defined(BOOST_HAS_LONG_LONG)
bool operator>>(boost::ulong_long_type& output) { return shr_unsigned(output); }
bool operator>>(boost::long_long_type& output) { return shr_signed(output); }
#elif defined(BOOST_HAS_MS_INT64)
bool operator>>(unsigned __int64& output) { return shr_unsigned(output); }
bool operator>>(__int64& output) { return shr_signed(output); }
#endif
#ifdef BOOST_HAS_INT128
bool operator>>(boost::uint128_type& output) { return shr_unsigned(output); }
bool operator>>(boost::int128_type& output) { return shr_signed(output); }
#endif
bool operator>>(char& output) { return shr_xchar(output); }
bool operator>>(unsigned char& output) { return shr_xchar(output); }
bool operator>>(signed char& output) { return shr_xchar(output); }
#if !defined(BOOST_LCAST_NO_WCHAR_T) && !defined(BOOST_NO_INTRINSIC_WCHAR_T)
bool operator>>(wchar_t& output) { return shr_xchar(output); }
#endif
#if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS)
bool operator>>(char16_t& output) { return shr_xchar(output); }
#endif
#if !defined(BOOST_NO_CXX11_CHAR32_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS)
bool operator>>(char32_t& output) { return shr_xchar(output); }
#endif
template<class Alloc>
bool operator>>(std::basic_string<CharT,Traits,Alloc>& str) {
str.assign(start, finish); return true;
}
template<class Alloc>
bool operator>>(boost::container::basic_string<CharT,Traits,Alloc>& str) {
str.assign(start, finish); return true;
}
template <std::size_t N>
bool operator>>(boost::array<CharT, N>& output) BOOST_NOEXCEPT {
return shr_std_array<N>(output);
}
template <std::size_t N>
bool operator>>(boost::array<unsigned char, N>& output) BOOST_NOEXCEPT {
return ((*this) >> reinterpret_cast<boost::array<char, N>& >(output));
}
template <std::size_t N>
bool operator>>(boost::array<signed char, N>& output) BOOST_NOEXCEPT {
return ((*this) >> reinterpret_cast<boost::array<char, N>& >(output));
}
#ifndef BOOST_NO_CXX11_HDR_ARRAY
template <class C, std::size_t N>
bool operator>>(std::array<C, N>& output) BOOST_NOEXCEPT {
BOOST_STATIC_ASSERT_MSG(
(sizeof(std::array<C, N>) == sizeof(boost::array<C, N>)),
"std::array<C, N> and boost::array<C, N> must have exactly the same layout."
);
return ((*this) >> reinterpret_cast<boost::array<C, N>& >(output));
}
#endif
bool operator>>(bool& output) BOOST_NOEXCEPT {
output = false; // Suppress warning about uninitalized variable
if (start == finish) return false;
CharT const zero = lcast_char_constants<CharT>::zero;
CharT const plus = lcast_char_constants<CharT>::plus;
CharT const minus = lcast_char_constants<CharT>::minus;
const CharT* const dec_finish = finish - 1;
output = Traits::eq(*dec_finish, zero + 1);
if (!output && !Traits::eq(*dec_finish, zero)) {
return false; // Does not ends on '0' or '1'
}
if (start == dec_finish) return true;
// We may have sign at the beginning
if (Traits::eq(plus, *start) || (Traits::eq(minus, *start) && !output)) {
++ start;
}
// Skipping zeros
while (start != dec_finish) {
if (!Traits::eq(zero, *start)) {
return false; // Not a zero => error
}
++ start;
}
return true;
}
private:
// Not optimised converter
template <class T>
bool float_types_converter_internal(T& output) {
if (parse_inf_nan(start, finish, output)) return true;
bool const return_value = shr_using_base_class(output);
/* Some compilers and libraries successfully
* parse 'inf', 'INFINITY', '1.0E', '1.0E-'...
* We are trying to provide a unified behaviour,
* so we just forbid such conversions (as some
* of the most popular compilers/libraries do)
* */
CharT const minus = lcast_char_constants<CharT>::minus;
CharT const plus = lcast_char_constants<CharT>::plus;
CharT const capital_e = lcast_char_constants<CharT>::capital_e;
CharT const lowercase_e = lcast_char_constants<CharT>::lowercase_e;
if ( return_value &&
(
Traits::eq(*(finish-1), lowercase_e) // 1.0e
|| Traits::eq(*(finish-1), capital_e) // 1.0E
|| Traits::eq(*(finish-1), minus) // 1.0e- or 1.0E-
|| Traits::eq(*(finish-1), plus) // 1.0e+ or 1.0E+
)
) return false;
return return_value;
}
public:
bool operator>>(float& output) { return float_types_converter_internal(output); }
bool operator>>(double& output) { return float_types_converter_internal(output); }
bool operator>>(long double& output) { return float_types_converter_internal(output); }
// Generic istream-based algorithm.
// lcast_streambuf_for_target<InputStreamable>::value is true.
template <typename InputStreamable>
bool operator>>(InputStreamable& output) {
return shr_using_base_class(output);
}
};
}
} // namespace boost
#undef BOOST_LCAST_NO_WCHAR_T
#endif // BOOST_LEXICAL_CAST_DETAIL_CONVERTER_LEXICAL_HPP

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// Copyright Kevlin Henney, 2000-2005.
// Copyright Alexander Nasonov, 2006-2010.
// Copyright Antony Polukhin, 2011-2022.
//
// 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 - 2016
#ifndef BOOST_LEXICAL_CAST_DETAIL_CONVERTER_NUMERIC_HPP
#define BOOST_LEXICAL_CAST_DETAIL_CONVERTER_NUMERIC_HPP
#include <boost/config.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
# pragma once
#endif
#include <boost/limits.hpp>
#include <boost/type_traits/type_identity.hpp>
#include <boost/type_traits/conditional.hpp>
#include <boost/type_traits/make_unsigned.hpp>
#include <boost/type_traits/is_signed.hpp>
#include <boost/type_traits/is_integral.hpp>
#include <boost/type_traits/is_arithmetic.hpp>
#include <boost/type_traits/is_base_of.hpp>
#include <boost/type_traits/is_float.hpp>
#include <boost/numeric/conversion/cast.hpp>
namespace boost { namespace detail {
template <class Source >
struct detect_precision_loss
{
typedef Source source_type;
typedef boost::numeric::Trunc<Source> Rounder;
typedef BOOST_DEDUCED_TYPENAME conditional<
boost::is_arithmetic<Source>::value, Source, Source const&
>::type argument_type ;
static inline source_type nearbyint(argument_type s, bool& is_ok) BOOST_NOEXCEPT {
const source_type near_int = Rounder::nearbyint(s);
if (near_int && is_ok) {
const source_type orig_div_round = s / near_int;
const source_type eps = std::numeric_limits<source_type>::epsilon();
is_ok = !((orig_div_round > 1 ? orig_div_round - 1 : 1 - orig_div_round) > eps);
}
return s;
}
typedef typename Rounder::round_style round_style;
};
template <typename Base, class Source>
struct fake_precision_loss: public Base
{
typedef Source source_type ;
typedef BOOST_DEDUCED_TYPENAME conditional<
boost::is_arithmetic<Source>::value, Source, Source const&
>::type argument_type ;
static inline source_type nearbyint(argument_type s, bool& /*is_ok*/) BOOST_NOEXCEPT {
return s;
}
};
struct nothrow_overflow_handler
{
inline bool operator() ( boost::numeric::range_check_result r ) const BOOST_NOEXCEPT {
return (r == boost::numeric::cInRange);
}
};
template <typename Target, typename Source>
inline bool noexcept_numeric_convert(const Source& arg, Target& result) BOOST_NOEXCEPT {
typedef boost::numeric::converter<
Target,
Source,
boost::numeric::conversion_traits<Target, Source >,
nothrow_overflow_handler,
detect_precision_loss<Source >
> converter_orig_t;
typedef BOOST_DEDUCED_TYPENAME boost::conditional<
boost::is_base_of< detect_precision_loss<Source >, converter_orig_t >::value,
converter_orig_t,
fake_precision_loss<converter_orig_t, Source>
>::type converter_t;
bool res = nothrow_overflow_handler()(converter_t::out_of_range(arg));
if (res) {
result = converter_t::low_level_convert(converter_t::nearbyint(arg, res));
}
return res;
}
template <typename Target, typename Source>
struct lexical_cast_dynamic_num_not_ignoring_minus
{
static inline bool try_convert(const Source &arg, Target& result) BOOST_NOEXCEPT {
return noexcept_numeric_convert<Target, Source >(arg, result);
}
};
template <typename Target, typename Source>
struct lexical_cast_dynamic_num_ignoring_minus
{
static inline bool try_convert(const Source &arg, Target& result) BOOST_NOEXCEPT {
typedef BOOST_DEDUCED_TYPENAME boost::conditional<
boost::is_float<Source>::value,
boost::type_identity<Source>,
boost::make_unsigned<Source>
>::type usource_lazy_t;
typedef BOOST_DEDUCED_TYPENAME usource_lazy_t::type usource_t;
if (arg < 0) {
const bool res = noexcept_numeric_convert<Target, usource_t>(0u - arg, result);
result = static_cast<Target>(0u - result);
return res;
} else {
return noexcept_numeric_convert<Target, usource_t>(arg, result);
}
}
};
/*
* lexical_cast_dynamic_num follows the rules:
* 1) If Source can be converted to Target without precision loss and
* without overflows, then assign Source to Target and return
*
* 2) If Source is less than 0 and Target is an unsigned integer,
* then negate Source, check the requirements of rule 1) and if
* successful, assign static_casted Source to Target and return
*
* 3) Otherwise throw a bad_lexical_cast exception
*
*
* Rule 2) required because boost::lexical_cast has the behavior of
* stringstream, which uses the rules of scanf for conversions. And
* in the C99 standard for unsigned input value minus sign is
* optional, so if a negative number is read, no errors will arise
* and the result will be the two's complement.
*/
template <typename Target, typename Source>
struct dynamic_num_converter_impl
{
static inline bool try_convert(const Source &arg, Target& result) BOOST_NOEXCEPT {
typedef BOOST_DEDUCED_TYPENAME boost::conditional<
boost::is_unsigned<Target>::value &&
(boost::is_signed<Source>::value || boost::is_float<Source>::value) &&
!(boost::is_same<Source, bool>::value) &&
!(boost::is_same<Target, bool>::value),
lexical_cast_dynamic_num_ignoring_minus<Target, Source>,
lexical_cast_dynamic_num_not_ignoring_minus<Target, Source>
>::type caster_type;
return caster_type::try_convert(arg, result);
}
};
}} // namespace boost::detail
#endif // BOOST_LEXICAL_CAST_DETAIL_CONVERTER_NUMERIC_HPP

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// Copyright Kevlin Henney, 2000-2005.
// Copyright Alexander Nasonov, 2006-2010.
// Copyright Antony Polukhin, 2011-2022.
//
// 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_DETAIL_INF_NAN_HPP
#define BOOST_LEXICAL_CAST_DETAIL_INF_NAN_HPP
#include <boost/config.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
# pragma once
#endif
#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
#define BOOST_LCAST_NO_WCHAR_T
#endif
#include <boost/limits.hpp>
#include <boost/detail/workaround.hpp>
#include <boost/core/cmath.hpp>
#include <cstddef>
#include <cstring>
#include <boost/lexical_cast/detail/lcast_char_constants.hpp>
namespace boost {
namespace detail
{
template <class CharT>
bool lc_iequal(const CharT* val, const CharT* lcase, const CharT* ucase, unsigned int len) BOOST_NOEXCEPT {
for( unsigned int i=0; i < len; ++i ) {
if ( val[i] != lcase[i] && val[i] != ucase[i] ) return false;
}
return true;
}
/* Returns true and sets the correct value if found NaN or Inf. */
template <class CharT, class T>
inline bool parse_inf_nan_impl(const CharT* begin, const CharT* end, T& value
, const CharT* lc_NAN, const CharT* lc_nan
, const CharT* lc_INFINITY, const CharT* lc_infinity
, const CharT opening_brace, const CharT closing_brace) BOOST_NOEXCEPT
{
if (begin == end) return false;
const CharT minus = lcast_char_constants<CharT>::minus;
const CharT plus = lcast_char_constants<CharT>::plus;
const int inifinity_size = 8; // == sizeof("infinity") - 1
/* Parsing +/- */
bool const has_minus = (*begin == minus);
if (has_minus || *begin == plus) {
++ begin;
}
if (end - begin < 3) return false;
if (lc_iequal(begin, lc_nan, lc_NAN, 3)) {
begin += 3;
if (end != begin) {
/* It is 'nan(...)' or some bad input*/
if (end - begin < 2) return false; // bad input
-- end;
if (*begin != opening_brace || *end != closing_brace) return false; // bad input
}
if( !has_minus ) value = std::numeric_limits<T>::quiet_NaN();
else value = boost::core::copysign(std::numeric_limits<T>::quiet_NaN(), static_cast<T>(-1));
return true;
} else if (
( /* 'INF' or 'inf' */
end - begin == 3 // 3 == sizeof('inf') - 1
&& lc_iequal(begin, lc_infinity, lc_INFINITY, 3)
)
||
( /* 'INFINITY' or 'infinity' */
end - begin == inifinity_size
&& lc_iequal(begin, lc_infinity, lc_INFINITY, inifinity_size)
)
)
{
if( !has_minus ) value = std::numeric_limits<T>::infinity();
else value = -std::numeric_limits<T>::infinity();
return true;
}
return false;
}
template <class CharT, class T>
bool put_inf_nan_impl(CharT* begin, CharT*& end, const T& value
, const CharT* lc_nan
, const CharT* lc_infinity) BOOST_NOEXCEPT
{
const CharT minus = lcast_char_constants<CharT>::minus;
if (boost::core::isnan(value)) {
if (boost::core::signbit(value)) {
*begin = minus;
++ begin;
}
std::memcpy(begin, lc_nan, 3 * sizeof(CharT));
end = begin + 3;
return true;
} else if (boost::core::isinf(value)) {
if (boost::core::signbit(value)) {
*begin = minus;
++ begin;
}
std::memcpy(begin, lc_infinity, 3 * sizeof(CharT));
end = begin + 3;
return true;
}
return false;
}
#ifndef BOOST_LCAST_NO_WCHAR_T
template <class T>
bool parse_inf_nan(const wchar_t* begin, const wchar_t* end, T& value) BOOST_NOEXCEPT {
return parse_inf_nan_impl(begin, end, value
, L"NAN", L"nan"
, L"INFINITY", L"infinity"
, L'(', L')');
}
template <class T>
bool put_inf_nan(wchar_t* begin, wchar_t*& end, const T& value) BOOST_NOEXCEPT {
return put_inf_nan_impl(begin, end, value, L"nan", L"infinity");
}
#endif
#if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS)
template <class T>
bool parse_inf_nan(const char16_t* begin, const char16_t* end, T& value) BOOST_NOEXCEPT {
return parse_inf_nan_impl(begin, end, value
, u"NAN", u"nan"
, u"INFINITY", u"infinity"
, u'(', u')');
}
template <class T>
bool put_inf_nan(char16_t* begin, char16_t*& end, const T& value) BOOST_NOEXCEPT {
return put_inf_nan_impl(begin, end, value, u"nan", u"infinity");
}
#endif
#if !defined(BOOST_NO_CXX11_CHAR32_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS)
template <class T>
bool parse_inf_nan(const char32_t* begin, const char32_t* end, T& value) BOOST_NOEXCEPT {
return parse_inf_nan_impl(begin, end, value
, U"NAN", U"nan"
, U"INFINITY", U"infinity"
, U'(', U')');
}
template <class T>
bool put_inf_nan(char32_t* begin, char32_t*& end, const T& value) BOOST_NOEXCEPT {
return put_inf_nan_impl(begin, end, value, U"nan", U"infinity");
}
#endif
template <class CharT, class T>
bool parse_inf_nan(const CharT* begin, const CharT* end, T& value) BOOST_NOEXCEPT {
return parse_inf_nan_impl(begin, end, value
, "NAN", "nan"
, "INFINITY", "infinity"
, '(', ')');
}
template <class CharT, class T>
bool put_inf_nan(CharT* begin, CharT*& end, const T& value) BOOST_NOEXCEPT {
return put_inf_nan_impl(begin, end, value, "nan", "infinity");
}
}
} // namespace boost
#undef BOOST_LCAST_NO_WCHAR_T
#endif // BOOST_LEXICAL_CAST_DETAIL_INF_NAN_HPP

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// Copyright Kevlin Henney, 2000-2005.
// Copyright Alexander Nasonov, 2006-2010.
// Copyright Antony Polukhin, 2011-2022.
//
// 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_DETAIL_IS_CHARACTER_HPP
#define BOOST_LEXICAL_CAST_DETAIL_IS_CHARACTER_HPP
#include <boost/config.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
# pragma once
#endif
#include <boost/type_traits/integral_constant.hpp>
#include <boost/type_traits/is_same.hpp>
namespace boost {
namespace detail // is_character<...>
{
// returns true, if T is one of the character types
template < typename T >
struct is_character
{
typedef BOOST_DEDUCED_TYPENAME boost::integral_constant<
bool,
boost::is_same< T, char >::value ||
#if !defined(BOOST_NO_STRINGSTREAM) && !defined(BOOST_NO_STD_WSTRING)
boost::is_same< T, wchar_t >::value ||
#endif
#ifndef BOOST_NO_CXX11_CHAR16_T
boost::is_same< T, char16_t >::value ||
#endif
#ifndef BOOST_NO_CXX11_CHAR32_T
boost::is_same< T, char32_t >::value ||
#endif
boost::is_same< T, unsigned char >::value ||
boost::is_same< T, signed char >::value
> type;
BOOST_STATIC_CONSTANT(bool, value = (type::value) );
};
}
}
#endif // BOOST_LEXICAL_CAST_DETAIL_IS_CHARACTER_HPP

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// Copyright Kevlin Henney, 2000-2005.
// Copyright Alexander Nasonov, 2006-2010.
// Copyright Antony Polukhin, 2011-2022.
//
// 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_DETAIL_LCAST_CHAR_CONSTANTS_HPP
#define BOOST_LEXICAL_CAST_DETAIL_LCAST_CHAR_CONSTANTS_HPP
#include <boost/config.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
# pragma once
#endif
namespace boost
{
namespace detail // '0', '-', '+', 'e', 'E' and '.' constants
{
template < typename Char >
struct lcast_char_constants {
// We check in tests assumption that static casted character is
// equal to correctly written C++ literal: U'0' == static_cast<char32_t>('0')
BOOST_STATIC_CONSTANT(Char, zero = static_cast<Char>('0'));
BOOST_STATIC_CONSTANT(Char, minus = static_cast<Char>('-'));
BOOST_STATIC_CONSTANT(Char, plus = static_cast<Char>('+'));
BOOST_STATIC_CONSTANT(Char, lowercase_e = static_cast<Char>('e'));
BOOST_STATIC_CONSTANT(Char, capital_e = static_cast<Char>('E'));
BOOST_STATIC_CONSTANT(Char, c_decimal_separator = static_cast<Char>('.'));
};
}
} // namespace boost
#endif // BOOST_LEXICAL_CAST_DETAIL_LCAST_CHAR_CONSTANTS_HPP

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// Copyright Kevlin Henney, 2000-2005.
// Copyright Alexander Nasonov, 2006-2010.
// Copyright Antony Polukhin, 2011-2022.
//
// 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_DETAIL_LCAST_UNSIGNED_CONVERTERS_HPP
#define BOOST_LEXICAL_CAST_DETAIL_LCAST_UNSIGNED_CONVERTERS_HPP
#include <boost/config.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
# pragma once
#endif
#include <climits>
#include <cstddef>
#include <string>
#include <cstring>
#include <cstdio>
#include <boost/limits.hpp>
#include <boost/type_traits/conditional.hpp>
#include <boost/static_assert.hpp>
#include <boost/detail/workaround.hpp>
#ifndef BOOST_NO_STD_LOCALE
# include <locale>
#else
# ifndef BOOST_LEXICAL_CAST_ASSUME_C_LOCALE
// Getting error at this point means, that your STL library is old/lame/misconfigured.
// If nothing can be done with STL library, define BOOST_LEXICAL_CAST_ASSUME_C_LOCALE,
// but beware: lexical_cast will understand only 'C' locale delimeters and thousands
// separators.
# error "Unable to use <locale> header. Define BOOST_LEXICAL_CAST_ASSUME_C_LOCALE to force "
# error "boost::lexical_cast to use only 'C' locale during conversions."
# endif
#endif
#include <boost/lexical_cast/detail/lcast_char_constants.hpp>
#include <boost/type_traits/make_unsigned.hpp>
#include <boost/type_traits/is_signed.hpp>
#include <boost/noncopyable.hpp>
namespace boost
{
namespace detail // lcast_to_unsigned
{
template<class T>
inline
BOOST_DEDUCED_TYPENAME boost::make_unsigned<T>::type lcast_to_unsigned(const T value) BOOST_NOEXCEPT {
typedef BOOST_DEDUCED_TYPENAME boost::make_unsigned<T>::type result_type;
return value < 0
? static_cast<result_type>(0u - static_cast<result_type>(value))
: static_cast<result_type>(value);
}
}
namespace detail // lcast_put_unsigned
{
template <class Traits, class T, class CharT>
class lcast_put_unsigned: boost::noncopyable {
typedef BOOST_DEDUCED_TYPENAME Traits::int_type int_type;
BOOST_DEDUCED_TYPENAME boost::conditional<
(sizeof(unsigned) > sizeof(T))
, unsigned
, T
>::type m_value;
CharT* m_finish;
CharT const m_czero;
int_type const m_zero;
public:
lcast_put_unsigned(const T n_param, CharT* finish) BOOST_NOEXCEPT
: m_value(n_param), m_finish(finish)
, m_czero(lcast_char_constants<CharT>::zero), m_zero(Traits::to_int_type(m_czero))
{
#ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
BOOST_STATIC_ASSERT(!std::numeric_limits<T>::is_signed);
#endif
}
CharT* convert() {
#ifndef BOOST_LEXICAL_CAST_ASSUME_C_LOCALE
std::locale loc;
if (loc == std::locale::classic()) {
return main_convert_loop();
}
typedef std::numpunct<CharT> numpunct;
numpunct const& np = BOOST_USE_FACET(numpunct, loc);
std::string const grouping = np.grouping();
std::string::size_type const grouping_size = grouping.size();
if (!grouping_size || grouping[0] <= 0) {
return main_convert_loop();
}
#ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
// Check that ulimited group is unreachable:
BOOST_STATIC_ASSERT(std::numeric_limits<T>::digits10 < CHAR_MAX);
#endif
CharT const thousands_sep = np.thousands_sep();
std::string::size_type group = 0; // current group number
char last_grp_size = grouping[0];
char left = last_grp_size;
do {
if (left == 0) {
++group;
if (group < grouping_size) {
char const grp_size = grouping[group];
last_grp_size = (grp_size <= 0 ? static_cast<char>(CHAR_MAX) : grp_size);
}
left = last_grp_size;
--m_finish;
Traits::assign(*m_finish, thousands_sep);
}
--left;
} while (main_convert_iteration());
return m_finish;
#else
return main_convert_loop();
#endif
}
private:
inline bool main_convert_iteration() BOOST_NOEXCEPT {
--m_finish;
int_type const digit = static_cast<int_type>(m_value % 10U);
Traits::assign(*m_finish, Traits::to_char_type(m_zero + digit));
m_value /= 10;
return !!m_value; // suppressing warnings
}
inline CharT* main_convert_loop() BOOST_NOEXCEPT {
while (main_convert_iteration());
return m_finish;
}
};
}
namespace detail // lcast_ret_unsigned
{
template <class Traits, class T, class CharT>
class lcast_ret_unsigned: boost::noncopyable {
bool m_multiplier_overflowed;
T m_multiplier;
T& m_value;
const CharT* const m_begin;
const CharT* m_end;
public:
lcast_ret_unsigned(T& value, const CharT* const begin, const CharT* end) BOOST_NOEXCEPT
: m_multiplier_overflowed(false), m_multiplier(1), m_value(value), m_begin(begin), m_end(end)
{
#ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
BOOST_STATIC_ASSERT(!std::numeric_limits<T>::is_signed);
// GCC when used with flag -std=c++0x may not have std::numeric_limits
// specializations for __int128 and unsigned __int128 types.
// Try compilation with -std=gnu++0x or -std=gnu++11.
//
// http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40856
BOOST_STATIC_ASSERT_MSG(std::numeric_limits<T>::is_specialized,
"std::numeric_limits are not specialized for integral type passed to boost::lexical_cast"
);
#endif
}
inline bool convert() {
CharT const czero = lcast_char_constants<CharT>::zero;
--m_end;
m_value = static_cast<T>(0);
if (m_begin > m_end || *m_end < czero || *m_end >= czero + 10)
return false;
m_value = static_cast<T>(*m_end - czero);
--m_end;
#ifdef BOOST_LEXICAL_CAST_ASSUME_C_LOCALE
return main_convert_loop();
#else
std::locale loc;
if (loc == std::locale::classic()) {
return main_convert_loop();
}
typedef std::numpunct<CharT> numpunct;
numpunct const& np = BOOST_USE_FACET(numpunct, loc);
std::string const& grouping = np.grouping();
std::string::size_type const grouping_size = grouping.size();
/* According to Programming languages - C++
* we MUST check for correct grouping
*/
if (!grouping_size || grouping[0] <= 0) {
return main_convert_loop();
}
unsigned char current_grouping = 0;
CharT const thousands_sep = np.thousands_sep();
char remained = static_cast<char>(grouping[current_grouping] - 1);
for (;m_end >= m_begin; --m_end)
{
if (remained) {
if (!main_convert_iteration()) {
return false;
}
--remained;
} else {
if ( !Traits::eq(*m_end, thousands_sep) ) //|| begin == end ) return false;
{
/*
* According to Programming languages - C++
* Digit grouping is checked. That is, the positions of discarded
* separators is examined for consistency with
* use_facet<numpunct<charT> >(loc ).grouping()
*
* BUT what if there is no separators at all and grouping()
* is not empty? Well, we have no extraced separators, so we
* won`t check them for consistency. This will allow us to
* work with "C" locale from other locales
*/
return main_convert_loop();
} else {
if (m_begin == m_end) return false;
if (current_grouping < grouping_size - 1) ++current_grouping;
remained = grouping[current_grouping];
}
}
} /*for*/
return true;
#endif
}
private:
// Iteration that does not care about grouping/separators and assumes that all
// input characters are digits
inline bool main_convert_iteration() BOOST_NOEXCEPT {
CharT const czero = lcast_char_constants<CharT>::zero;
T const maxv = (std::numeric_limits<T>::max)();
m_multiplier_overflowed = m_multiplier_overflowed || (maxv/10 < m_multiplier);
m_multiplier = static_cast<T>(m_multiplier * 10);
T const dig_value = static_cast<T>(*m_end - czero);
T const new_sub_value = static_cast<T>(m_multiplier * dig_value);
// We must correctly handle situations like `000000000000000000000000000001`.
// So we take care of overflow only if `dig_value` is not '0'.
if (*m_end < czero || *m_end >= czero + 10 // checking for correct digit
|| (dig_value && ( // checking for overflow of ...
m_multiplier_overflowed // ... multiplier
|| static_cast<T>(maxv / dig_value) < m_multiplier // ... subvalue
|| static_cast<T>(maxv - new_sub_value) < m_value // ... whole expression
))
) return false;
m_value = static_cast<T>(m_value + new_sub_value);
return true;
}
bool main_convert_loop() BOOST_NOEXCEPT {
for ( ; m_end >= m_begin; --m_end) {
if (!main_convert_iteration()) {
return false;
}
}
return true;
}
};
}
} // namespace boost
#endif // BOOST_LEXICAL_CAST_DETAIL_LCAST_UNSIGNED_CONVERTERS_HPP

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// Copyright Kevlin Henney, 2000-2005.
// Copyright Alexander Nasonov, 2006-2010.
// Copyright Antony Polukhin, 2011-2022.
//
// 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_DETAIL_WIDEST_CHAR_HPP
#define BOOST_LEXICAL_CAST_DETAIL_WIDEST_CHAR_HPP
#include <boost/config.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
# pragma once
#endif
#include <boost/type_traits/conditional.hpp>
namespace boost { namespace detail {
template <typename TargetChar, typename SourceChar>
struct widest_char {
typedef BOOST_DEDUCED_TYPENAME boost::conditional<
(sizeof(TargetChar) > sizeof(SourceChar))
, TargetChar
, SourceChar
>::type type;
};
}} // namespace boost::detail
#endif // BOOST_LEXICAL_CAST_DETAIL_WIDEST_CHAR_HPP

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// Copyright Kevlin Henney, 2000-2005.
// Copyright Alexander Nasonov, 2006-2010.
// Copyright Antony Polukhin, 2011-2022.
//
// 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_LEXICAL_CAST_OLD_HPP
#define BOOST_LEXICAL_CAST_LEXICAL_CAST_OLD_HPP
#include <boost/config.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
# pragma once
#endif
#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
#define BOOST_LCAST_NO_WCHAR_T
#endif
#include <climits>
#include <cstddef>
#include <string>
#include <cstring>
#include <cstdio>
#include <boost/limits.hpp>
#include <boost/type_traits/is_pointer.hpp>
#include <boost/static_assert.hpp>
#include <boost/detail/lcast_precision.hpp>
#include <boost/detail/workaround.hpp>
#ifdef BOOST_NO_STRINGSTREAM
#include <strstream>
#else
#include <sstream>
#endif
#include <boost/lexical_cast/bad_lexical_cast.hpp>
#include <boost/lexical_cast/detail/widest_char.hpp>
namespace boost {
namespace detail
{
// selectors for choosing stream character type
template<typename Type>
struct stream_char
{
typedef char type;
};
#ifndef BOOST_LCAST_NO_WCHAR_T
#ifndef BOOST_NO_INTRINSIC_WCHAR_T
template<>
struct stream_char<wchar_t>
{
typedef wchar_t type;
};
#endif
template<>
struct stream_char<wchar_t *>
{
typedef wchar_t type;
};
template<>
struct stream_char<const wchar_t *>
{
typedef wchar_t type;
};
template<>
struct stream_char<std::wstring>
{
typedef wchar_t type;
};
#endif
// stream wrapper for handling lexical conversions
template<typename Target, typename Source, typename Traits>
class lexical_stream
{
private:
typedef typename widest_char<
typename stream_char<Target>::type,
typename stream_char<Source>::type>::type char_type;
typedef Traits traits_type;
public:
lexical_stream(char_type* = 0, char_type* = 0)
{
stream.unsetf(std::ios::skipws);
lcast_set_precision(stream, static_cast<Source*>(0), static_cast<Target*>(0) );
}
~lexical_stream()
{
#if defined(BOOST_NO_STRINGSTREAM)
stream.freeze(false);
#endif
}
bool operator<<(const Source &input)
{
return !(stream << input).fail();
}
template<typename InputStreamable>
bool operator>>(InputStreamable &output)
{
return !is_pointer<InputStreamable>::value &&
stream >> output &&
stream.get() == traits_type::eof();
}
bool operator>>(std::string &output)
{
#if defined(BOOST_NO_STRINGSTREAM)
stream << '\0';
#endif
stream.str().swap(output);
return true;
}
#ifndef BOOST_LCAST_NO_WCHAR_T
bool operator>>(std::wstring &output)
{
stream.str().swap(output);
return true;
}
#endif
private:
#if defined(BOOST_NO_STRINGSTREAM)
std::strstream stream;
#elif defined(BOOST_NO_STD_LOCALE)
std::stringstream stream;
#else
std::basic_stringstream<char_type,traits_type> stream;
#endif
};
}
// call-by-value fallback version (deprecated)
template<typename Target, typename Source>
Target lexical_cast(Source arg)
{
typedef typename detail::widest_char<
BOOST_DEDUCED_TYPENAME detail::stream_char<Target>::type
, BOOST_DEDUCED_TYPENAME detail::stream_char<Source>::type
>::type char_type;
typedef std::char_traits<char_type> traits;
detail::lexical_stream<Target, Source, traits> interpreter;
Target result;
if(!(interpreter << arg && interpreter >> result))
boost::conversion::detail::throw_bad_cast<Source, Target>();
return result;
}
} // namespace boost
#undef BOOST_LCAST_NO_WCHAR_T
#endif // BOOST_LEXICAL_CAST_LEXICAL_CAST_OLD_HPP

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// Copyright Kevlin Henney, 2000-2005.
// Copyright Alexander Nasonov, 2006-2010.
// Copyright Antony Polukhin, 2011-2022.
//
// 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_TRY_LEXICAL_CONVERT_HPP
#define BOOST_LEXICAL_CAST_TRY_LEXICAL_CONVERT_HPP
#include <boost/config.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
# pragma once
#endif
#if defined(__clang__) || (defined(__GNUC__) && \
!(defined(__INTEL_COMPILER) || defined(__ICL) || defined(__ICC) || defined(__ECC)) && \
(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)))
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wuninitialized"
#pragma GCC diagnostic ignored "-Wsign-conversion"
#endif
#include <string>
#include <boost/type_traits/is_integral.hpp>
#include <boost/type_traits/type_identity.hpp>
#include <boost/type_traits/conditional.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/type_traits/is_arithmetic.hpp>
#include <boost/lexical_cast/detail/is_character.hpp>
#include <boost/lexical_cast/detail/converter_numeric.hpp>
#include <boost/lexical_cast/detail/converter_lexical.hpp>
#include <boost/range/iterator_range_core.hpp>
#include <boost/container/container_fwd.hpp>
namespace boost {
namespace detail
{
template<typename T>
struct is_stdstring
: boost::false_type
{};
template<typename CharT, typename Traits, typename Alloc>
struct is_stdstring< std::basic_string<CharT, Traits, Alloc> >
: boost::true_type
{};
// Sun Studio has problem with partial specialization of templates differing only in namespace.
// We workaround that by making `is_booststring` trait, instead of specializing `is_stdstring` for `boost::container::basic_string`.
template<typename T>
struct is_booststring
: boost::false_type
{};
template<typename CharT, typename Traits, typename Alloc>
struct is_booststring< boost::container::basic_string<CharT, Traits, Alloc> >
: boost::true_type
{};
template<typename Target, typename Source>
struct is_arithmetic_and_not_xchars
{
typedef boost::integral_constant<
bool,
!(boost::detail::is_character<Target>::value) &&
!(boost::detail::is_character<Source>::value) &&
boost::is_arithmetic<Source>::value &&
boost::is_arithmetic<Target>::value
> type;
BOOST_STATIC_CONSTANT(bool, value = (
type::value
));
};
/*
* is_xchar_to_xchar<Target, Source>::value is true,
* Target and Souce are char types of the same size 1 (char, signed char, unsigned char).
*/
template<typename Target, typename Source>
struct is_xchar_to_xchar
{
typedef boost::integral_constant<
bool,
sizeof(Source) == sizeof(Target) &&
sizeof(Source) == sizeof(char) &&
boost::detail::is_character<Target>::value &&
boost::detail::is_character<Source>::value
> type;
BOOST_STATIC_CONSTANT(bool, value = (
type::value
));
};
template<typename Target, typename Source>
struct is_char_array_to_stdstring
: boost::false_type
{};
template<typename CharT, typename Traits, typename Alloc>
struct is_char_array_to_stdstring< std::basic_string<CharT, Traits, Alloc>, CharT* >
: boost::true_type
{};
template<typename CharT, typename Traits, typename Alloc>
struct is_char_array_to_stdstring< std::basic_string<CharT, Traits, Alloc>, const CharT* >
: boost::true_type
{};
// Sun Studio has problem with partial specialization of templates differing only in namespace.
// We workaround that by making `is_char_array_to_booststring` trait, instead of specializing `is_char_array_to_stdstring` for `boost::container::basic_string`.
template<typename Target, typename Source>
struct is_char_array_to_booststring
: boost::false_type
{};
template<typename CharT, typename Traits, typename Alloc>
struct is_char_array_to_booststring< boost::container::basic_string<CharT, Traits, Alloc>, CharT* >
: boost::true_type
{};
template<typename CharT, typename Traits, typename Alloc>
struct is_char_array_to_booststring< boost::container::basic_string<CharT, Traits, Alloc>, const CharT* >
: boost::true_type
{};
template <typename Target, typename Source>
struct copy_converter_impl
{
// MSVC fail to forward an array (DevDiv#555157 "SILENT BAD CODEGEN triggered by perfect forwarding",
// fixed in 2013 RTM).
#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && (!defined(BOOST_MSVC) || BOOST_MSVC >= 1800)
template <class T>
static inline bool try_convert(T&& arg, Target& result) {
result = static_cast<T&&>(arg); // eqaul to `result = std::forward<T>(arg);`
return true;
}
#else
static inline bool try_convert(const Source& arg, Target& result) {
result = arg;
return true;
}
#endif
};
}
namespace conversion { namespace detail {
template <typename Target, typename Source>
inline bool try_lexical_convert(const Source& arg, Target& result)
{
typedef BOOST_DEDUCED_TYPENAME boost::detail::array_to_pointer_decay<Source>::type src;
typedef boost::integral_constant<
bool,
boost::detail::is_xchar_to_xchar<Target, src >::value ||
boost::detail::is_char_array_to_stdstring<Target, src >::value ||
boost::detail::is_char_array_to_booststring<Target, src >::value ||
(
boost::is_same<Target, src >::value &&
(boost::detail::is_stdstring<Target >::value || boost::detail::is_booststring<Target >::value)
) ||
(
boost::is_same<Target, src >::value &&
boost::detail::is_character<Target >::value
)
> shall_we_copy_t;
typedef boost::detail::is_arithmetic_and_not_xchars<Target, src >
shall_we_copy_with_dynamic_check_t;
// We do evaluate second `if_` lazily to avoid unnecessary instantiations
// of `shall_we_copy_with_dynamic_check_t` and improve compilation times.
typedef BOOST_DEDUCED_TYPENAME boost::conditional<
shall_we_copy_t::value,
boost::type_identity<boost::detail::copy_converter_impl<Target, src > >,
boost::conditional<
shall_we_copy_with_dynamic_check_t::value,
boost::detail::dynamic_num_converter_impl<Target, src >,
boost::detail::lexical_converter_impl<Target, src >
>
>::type caster_type_lazy;
typedef BOOST_DEDUCED_TYPENAME caster_type_lazy::type caster_type;
return caster_type::try_convert(arg, result);
}
template <typename Target, typename CharacterT>
inline bool try_lexical_convert(const CharacterT* chars, std::size_t count, Target& result)
{
BOOST_STATIC_ASSERT_MSG(
boost::detail::is_character<CharacterT>::value,
"This overload of try_lexical_convert is meant to be used only with arrays of characters."
);
return ::boost::conversion::detail::try_lexical_convert(
::boost::iterator_range<const CharacterT*>(chars, chars + count), result
);
}
}} // namespace conversion::detail
namespace conversion {
// ADL barrier
using ::boost::conversion::detail::try_lexical_convert;
}
} // namespace boost
#if defined(__clang__) || (defined(__GNUC__) && \
!(defined(__INTEL_COMPILER) || defined(__ICL) || defined(__ICC) || defined(__ECC)) && \
(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)))
#pragma GCC diagnostic pop
#endif
#endif // BOOST_LEXICAL_CAST_TRY_LEXICAL_CONVERT_HPP