Squashed 'third_party/boostorg/lexical_cast/' content from commit 5bfe667
Change-Id: I518d0a0b83082059176813a98b80ad92892ac745
git-subtree-dir: third_party/boostorg/lexical_cast
git-subtree-split: 5bfe6672d467ebd8de5d911c07b2a931b43156de
diff --git a/include/boost/detail/basic_pointerbuf.hpp b/include/boost/detail/basic_pointerbuf.hpp
new file mode 100644
index 0000000..85618f9
--- /dev/null
+++ b/include/boost/detail/basic_pointerbuf.hpp
@@ -0,0 +1,139 @@
+//-----------------------------------------------------------------------------
+// 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);
+ inline typename this_type::pos_type seekpos(pos_type sp, ::std::ios_base::openmode which);
+ inline typename this_type::pos_type seekoff(off_type off, ::std::ios_base::seekdir way, ::std::ios_base::openmode which);
+
+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
+
diff --git a/include/boost/detail/lcast_precision.hpp b/include/boost/detail/lcast_precision.hpp
new file mode 100644
index 0000000..2be88fd
--- /dev/null
+++ b/include/boost/detail/lcast_precision.hpp
@@ -0,0 +1,185 @@
+// 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/mpl/if.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::mpl::if_<
+ boost::is_abstract<T>
+ , 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::mpl::if_<
+ boost::is_abstract<T>
+ , 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
+
diff --git a/include/boost/lexical_cast.hpp b/include/boost/lexical_cast.hpp
new file mode 100644
index 0000000..3dc21f8
--- /dev/null
+++ b/include/boost/lexical_cast.hpp
@@ -0,0 +1,105 @@
+// Copyright Kevlin Henney, 2000-2005.
+// Copyright Alexander Nasonov, 2006-2010.
+// Copyright Antony Polukhin, 2011-2014.
+//
+// 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
+
diff --git a/include/boost/lexical_cast/bad_lexical_cast.hpp b/include/boost/lexical_cast/bad_lexical_cast.hpp
new file mode 100644
index 0000000..0931215
--- /dev/null
+++ b/include/boost/lexical_cast/bad_lexical_cast.hpp
@@ -0,0 +1,101 @@
+// Copyright Kevlin Henney, 2000-2005.
+// Copyright Alexander Nasonov, 2006-2010.
+// Copyright Antony Polukhin, 2011-2014.
+//
+// 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 <typeinfo>
+#include <exception>
+#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(__BORLANDC__) && BOOST_WORKAROUND( __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
+ {}
+
+ virtual const char *what() const BOOST_NOEXCEPT_OR_NOTHROW {
+ return "bad lexical cast: "
+ "source type value could not be interpreted as target";
+ }
+
+ virtual ~bad_lexical_cast() BOOST_NOEXCEPT_OR_NOTHROW
+ {}
+
+#ifndef BOOST_NO_TYPEID
+ bad_lexical_cast(
+ const std::type_info &source_type_arg,
+ const std::type_info &target_type_arg) BOOST_NOEXCEPT
+ : source(&source_type_arg), target(&target_type_arg)
+ {}
+
+ const std::type_info &source_type() const BOOST_NOEXCEPT {
+ return *source;
+ }
+
+ const std::type_info &target_type() const BOOST_NOEXCEPT {
+ return *target;
+ }
+
+ private:
+ const std::type_info *source;
+ const std::type_info *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
+
diff --git a/include/boost/lexical_cast/detail/converter_lexical.hpp b/include/boost/lexical_cast/detail/converter_lexical.hpp
new file mode 100644
index 0000000..fd866d8
--- /dev/null
+++ b/include/boost/lexical_cast/detail/converter_lexical.hpp
@@ -0,0 +1,498 @@
+// Copyright Kevlin Henney, 2000-2005.
+// Copyright Alexander Nasonov, 2006-2010.
+// Copyright Antony Polukhin, 2011-2014.
+//
+// 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/mpl/bool.hpp>
+#include <boost/mpl/identity.hpp>
+#include <boost/mpl/if.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::mpl::if_c<
+ boost::detail::is_character< Type >::value,
+ Type,
+ boost::detail::deduce_character_type_later< Type >
+ > {};
+
+ template < typename Char >
+ struct stream_char_common< Char* >: public boost::mpl::if_c<
+ 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::mpl::if_c<
+ 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::mpl::if_c<
+ 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::mpl::if_c<
+ 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::mpl::if_c<
+ 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::mpl::if_c<
+ 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::mpl::if_c<
+ 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::mpl::if_c<
+ 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::mpl::identity< char > {};
+ template <> struct stream_char_common< boost::uint128_type >: public boost::mpl::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::mpl::if_c<
+ 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::mpl::if_c<
+ 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::mpl::if_c<
+ 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::mpl::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::mpl::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
+
diff --git a/include/boost/lexical_cast/detail/converter_lexical_streams.hpp b/include/boost/lexical_cast/detail/converter_lexical_streams.hpp
new file mode 100644
index 0000000..3758a9c
--- /dev/null
+++ b/include/boost/lexical_cast/detail/converter_lexical_streams.hpp
@@ -0,0 +1,786 @@
+// Copyright Kevlin Henney, 2000-2005.
+// Copyright Alexander Nasonov, 2006-2010.
+// Copyright Antony Polukhin, 2011-2016.
+//
+// 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/mpl/if.hpp>
+#include <boost/type_traits/is_pointer.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
+
+#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::mpl::if_c<
+ 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::mpl::if_c<
+ 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
+
diff --git a/include/boost/lexical_cast/detail/converter_numeric.hpp b/include/boost/lexical_cast/detail/converter_numeric.hpp
new file mode 100644
index 0000000..f50e2ca
--- /dev/null
+++ b/include/boost/lexical_cast/detail/converter_numeric.hpp
@@ -0,0 +1,172 @@
+// Copyright Kevlin Henney, 2000-2005.
+// Copyright Alexander Nasonov, 2006-2010.
+// Copyright Antony Polukhin, 2011-2016.
+//
+// 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/mpl/eval_if.hpp>
+#include <boost/mpl/identity.hpp>
+#include <boost/mpl/if.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 mpl::if_<
+ boost::is_arithmetic<Source>, 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 mpl::if_<
+ boost::is_arithmetic<Source>, 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::mpl::if_c<
+ 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));
+ 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::mpl::eval_if_c<
+ boost::is_float<Source>::value,
+ boost::mpl::identity<Source>,
+ boost::make_unsigned<Source>
+ >::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::mpl::if_c<
+ 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
+
diff --git a/include/boost/lexical_cast/detail/inf_nan.hpp b/include/boost/lexical_cast/detail/inf_nan.hpp
new file mode 100644
index 0000000..c10457e
--- /dev/null
+++ b/include/boost/lexical_cast/detail/inf_nan.hpp
@@ -0,0 +1,197 @@
+// Copyright Kevlin Henney, 2000-2005.
+// Copyright Alexander Nasonov, 2006-2010.
+// Copyright Antony Polukhin, 2011-2014.
+//
+// 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 <cstddef>
+#include <cstring>
+#include <boost/limits.hpp>
+#include <boost/detail/workaround.hpp>
+#include <boost/math/special_functions/sign.hpp>
+#include <boost/math/special_functions/fpclassify.hpp>
+
+#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
+ {
+ using namespace std;
+ 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::math::changesign) (std::numeric_limits<T>::quiet_NaN());
+ 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 = (boost::math::changesign) (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
+ {
+ using namespace std;
+ const CharT minus = lcast_char_constants<CharT>::minus;
+ if ((boost::math::isnan)(value)) {
+ if ((boost::math::signbit)(value)) {
+ *begin = minus;
+ ++ begin;
+ }
+
+ memcpy(begin, lc_nan, 3 * sizeof(CharT));
+ end = begin + 3;
+ return true;
+ } else if ((boost::math::isinf)(value)) {
+ if ((boost::math::signbit)(value)) {
+ *begin = minus;
+ ++ begin;
+ }
+
+ 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
+
diff --git a/include/boost/lexical_cast/detail/is_character.hpp b/include/boost/lexical_cast/detail/is_character.hpp
new file mode 100644
index 0000000..732c39f
--- /dev/null
+++ b/include/boost/lexical_cast/detail/is_character.hpp
@@ -0,0 +1,58 @@
+// Copyright Kevlin Henney, 2000-2005.
+// Copyright Alexander Nasonov, 2006-2010.
+// Copyright Antony Polukhin, 2011-2014.
+//
+// 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/mpl/bool.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::mpl::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
+
diff --git a/include/boost/lexical_cast/detail/lcast_char_constants.hpp b/include/boost/lexical_cast/detail/lcast_char_constants.hpp
new file mode 100644
index 0000000..fd651ee
--- /dev/null
+++ b/include/boost/lexical_cast/detail/lcast_char_constants.hpp
@@ -0,0 +1,46 @@
+// Copyright Kevlin Henney, 2000-2005.
+// Copyright Alexander Nasonov, 2006-2010.
+// Copyright Antony Polukhin, 2011-2014.
+//
+// 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
+
diff --git a/include/boost/lexical_cast/detail/lcast_unsigned_converters.hpp b/include/boost/lexical_cast/detail/lcast_unsigned_converters.hpp
new file mode 100644
index 0000000..268961e
--- /dev/null
+++ b/include/boost/lexical_cast/detail/lcast_unsigned_converters.hpp
@@ -0,0 +1,294 @@
+// Copyright Kevlin Henney, 2000-2005.
+// Copyright Alexander Nasonov, 2006-2010.
+// Copyright Antony Polukhin, 2011-2014.
+//
+// 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/mpl/if.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::mpl::if_c<
+ (sizeof(int_type) > sizeof(T))
+ , int_type
+ , 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
+
diff --git a/include/boost/lexical_cast/detail/widest_char.hpp b/include/boost/lexical_cast/detail/widest_char.hpp
new file mode 100644
index 0000000..013aaf1
--- /dev/null
+++ b/include/boost/lexical_cast/detail/widest_char.hpp
@@ -0,0 +1,40 @@
+// Copyright Kevlin Henney, 2000-2005.
+// Copyright Alexander Nasonov, 2006-2010.
+// Copyright Antony Polukhin, 2011-2014.
+//
+// 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
+
+namespace boost { namespace detail {
+
+ template <typename TargetChar, typename SourceChar>
+ struct widest_char {
+ typedef BOOST_DEDUCED_TYPENAME boost::mpl::if_c<
+ (sizeof(TargetChar) > sizeof(SourceChar))
+ , TargetChar
+ , SourceChar
+ >::type type;
+ };
+
+}} // namespace boost::detail
+
+#endif // BOOST_LEXICAL_CAST_DETAIL_WIDEST_CHAR_HPP
+
diff --git a/include/boost/lexical_cast/lexical_cast_old.hpp b/include/boost/lexical_cast/lexical_cast_old.hpp
new file mode 100644
index 0000000..b48bf1f
--- /dev/null
+++ b/include/boost/lexical_cast/lexical_cast_old.hpp
@@ -0,0 +1,176 @@
+// Copyright Kevlin Henney, 2000-2005.
+// Copyright Alexander Nasonov, 2006-2010.
+// Copyright Antony Polukhin, 2011-2014.
+//
+// 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/mpl/if.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
+
diff --git a/include/boost/lexical_cast/try_lexical_convert.hpp b/include/boost/lexical_cast/try_lexical_convert.hpp
new file mode 100644
index 0000000..b079fd4
--- /dev/null
+++ b/include/boost/lexical_cast/try_lexical_convert.hpp
@@ -0,0 +1,227 @@
+// Copyright Kevlin Henney, 2000-2005.
+// Copyright Alexander Nasonov, 2006-2010.
+// Copyright Antony Polukhin, 2011-2016.
+//
+// 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"
+#endif
+
+#include <string>
+#include <boost/mpl/bool.hpp>
+#include <boost/mpl/identity.hpp>
+#include <boost/mpl/if.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::mpl::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::mpl::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::mpl::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::mpl::if_c<
+ shall_we_copy_t::value,
+ boost::mpl::identity<boost::detail::copy_converter_impl<Target, src > >,
+ boost::mpl::if_<
+ shall_we_copy_with_dynamic_check_t,
+ 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
+