diff -r 000000000000 -r 044383f39525 imgtools/imglib/boostlibrary/boost/lexical_cast.hpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/imgtools/imglib/boostlibrary/boost/lexical_cast.hpp	Tue Oct 27 16:36:35 2009 +0000
@@ -0,0 +1,1216 @@
+#ifndef BOOST_LEXICAL_CAST_INCLUDED
+#define BOOST_LEXICAL_CAST_INCLUDED
+
+// Boost lexical_cast.hpp header  -------------------------------------------//
+//
+// See http://www.boost.org/libs/conversion for documentation.
+// See end of this header for rights and permissions.
+//
+// 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 and other Boosters
+// when:  November 2000, March 2003, June 2005, June 2006
+
+#include <climits>
+#include <cstddef>
+#include <istream>
+#include <string>
+#include <typeinfo>
+#include <exception>
+#include <boost/config.hpp>
+#include <boost/limits.hpp>
+#include <boost/mpl/if.hpp>
+#include <boost/throw_exception.hpp>
+#include <boost/type_traits/is_pointer.hpp>
+#include <boost/type_traits/make_unsigned.hpp>
+#include <boost/call_traits.hpp>
+#include <boost/static_assert.hpp>
+#include <boost/detail/lcast_precision.hpp>
+#include <boost/detail/workaround.hpp>
+
+#ifndef BOOST_NO_STD_LOCALE
+#include <locale>
+#endif
+
+#ifdef BOOST_NO_STRINGSTREAM
+#include <strstream>
+#else
+#include <sstream>
+#endif
+
+#if defined(BOOST_NO_STRINGSTREAM) || \
+    defined(BOOST_NO_STD_WSTRING) || \
+    defined(BOOST_NO_STD_LOCALE) 
+#define BOOST_LCAST_NO_WCHAR_T
+#endif
+
+namespace boost
+{
+    // exception used to indicate runtime lexical_cast failure
+    class bad_lexical_cast : public std::bad_cast
+
+#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() :
+#ifndef BOOST_NO_TYPEID
+          source(&typeid(void)), target(&typeid(void))
+#else
+          source(0), target(0) // this breaks getters
+#endif
+        {
+        }
+
+        bad_lexical_cast(
+            const std::type_info &source_type_arg,
+            const std::type_info &target_type_arg) :
+            source(&source_type_arg), target(&target_type_arg)
+        {
+        }
+
+        const std::type_info &source_type() const
+        {
+            return *source;
+        }
+        const std::type_info &target_type() const
+        {
+            return *target;
+        }
+
+        virtual const char *what() const throw()
+        {
+            return "bad lexical cast: "
+                   "source type value could not be interpreted as target";
+        }
+        virtual ~bad_lexical_cast() throw()
+        {
+        }
+    private:
+        const std::type_info *source;
+        const std::type_info *target;
+    };
+
+    namespace detail // selectors for choosing stream character type
+    {
+        template<typename Type>
+        struct stream_char
+        {
+            typedef char type;
+        };
+
+#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+        template<class CharT, class Traits, class Alloc>
+        struct stream_char< std::basic_string<CharT,Traits,Alloc> >
+        {
+            typedef CharT type;
+        };
+#endif
+
+#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;
+        };
+
+#ifdef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+        template<>
+        struct stream_char<std::wstring>
+        {
+            typedef wchar_t type;
+        };
+#endif
+#endif
+
+        template<typename TargetChar, typename SourceChar>
+        struct widest_char
+        {
+            typedef TargetChar type;
+        };
+
+        template<>
+        struct widest_char<char, wchar_t>
+        {
+            typedef wchar_t type;
+        };
+    }
+
+    namespace detail // deduce_char_traits template
+    {
+#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+        template<class CharT, class Target, class Source>
+        struct deduce_char_traits
+        {
+            typedef std::char_traits<CharT> type;
+        };
+
+        template<class CharT, class Traits, class Alloc, class Source>
+        struct deduce_char_traits< CharT
+                                 , std::basic_string<CharT,Traits,Alloc>
+                                 , Source
+                                 >
+        {
+            typedef Traits type;
+        };
+
+        template<class CharT, class Target, class Traits, class Alloc>
+        struct deduce_char_traits< CharT
+                                 , Target
+                                 , std::basic_string<CharT,Traits,Alloc>
+                                 >
+        {
+            typedef Traits type;
+        };
+
+        template<class CharT, class Traits, class Alloc1, class Alloc2>
+        struct deduce_char_traits< CharT
+                                 , std::basic_string<CharT,Traits,Alloc1>
+                                 , std::basic_string<CharT,Traits,Alloc2>
+                                 >
+        {
+            typedef Traits type;
+        };
+#endif
+    }
+
+    namespace detail // lcast_src_length
+    {
+        // Return max. length of string representation of Source;
+        // 0 if unlimited (with exceptions for some types, see below).
+        // Values with limited string representation are placed to
+        // the buffer locally defined in lexical_cast function.
+        // 1 is returned for few types such as CharT const* or
+        // std::basic_string<CharT> that already have an internal
+        // buffer ready to be reused by lexical_stream_limited_src.
+        // Each specialization should have a correspondent operator<<
+        // defined in lexical_stream_limited_src.
+        template< class CharT  // A result of widest_char transformation.
+                , class Source // Source type of lexical_cast.
+                >
+        struct lcast_src_length
+        {
+            BOOST_STATIC_CONSTANT(std::size_t, value = 0);
+            // To check coverage, build the test with
+            // bjam --v2 profile optimization=off
+            static void check_coverage() {}
+        };
+
+        template<>
+        struct lcast_src_length<char, bool>
+        {
+            BOOST_STATIC_CONSTANT(std::size_t, value = 1);
+            static void check_coverage() {}
+        };
+
+        template<>
+        struct lcast_src_length<char, char>
+        {
+            BOOST_STATIC_CONSTANT(std::size_t, value = 1);
+            static void check_coverage() {}
+        };
+
+        // No specializations for:
+        // lcast_src_length<char, signed char>
+        // lcast_src_length<char, unsigned char>
+        // lcast_src_length<char, signed char*>
+        // lcast_src_length<char, unsigned char*>
+        // lcast_src_length<char, signed char const*>
+        // lcast_src_length<char, unsigned char const*>
+
+#ifndef BOOST_LCAST_NO_WCHAR_T
+        template<>
+        struct lcast_src_length<wchar_t, bool>
+        {
+            BOOST_STATIC_CONSTANT(std::size_t, value = 1);
+            static void check_coverage() {}
+        };
+
+        template<>
+        struct lcast_src_length<wchar_t, char>
+        {
+            BOOST_STATIC_CONSTANT(std::size_t, value = 1);
+            static void check_coverage() {}
+        };
+
+#ifndef BOOST_NO_INTRINSIC_WCHAR_T
+        template<>
+        struct lcast_src_length<wchar_t, wchar_t>
+        {
+            BOOST_STATIC_CONSTANT(std::size_t, value = 1);
+            static void check_coverage() {}
+        };
+#endif
+#endif
+
+        template<>
+        struct lcast_src_length<char, char const*>
+        {
+            BOOST_STATIC_CONSTANT(std::size_t, value = 1);
+            static void check_coverage() {}
+        };
+
+        template<>
+        struct lcast_src_length<char, char*>
+        {
+            BOOST_STATIC_CONSTANT(std::size_t, value = 1);
+            static void check_coverage() {}
+        };
+
+#ifndef BOOST_LCAST_NO_WCHAR_T
+        template<>
+        struct lcast_src_length<wchar_t, wchar_t const*>
+        {
+            BOOST_STATIC_CONSTANT(std::size_t, value = 1);
+            static void check_coverage() {}
+        };
+
+        template<>
+        struct lcast_src_length<wchar_t, wchar_t*>
+        {
+            BOOST_STATIC_CONSTANT(std::size_t, value = 1);
+            static void check_coverage() {}
+        };
+#endif
+
+#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+        template<class CharT, class Traits, class Alloc>
+        struct lcast_src_length< CharT, std::basic_string<CharT,Traits,Alloc> >
+        {
+            BOOST_STATIC_CONSTANT(std::size_t, value = 1);
+            static void check_coverage() {}
+        };
+#else
+        template<>
+        struct lcast_src_length< char, std::basic_string<char> >
+        {
+            BOOST_STATIC_CONSTANT(std::size_t, value = 1);
+            static void check_coverage() {}
+        };
+
+#ifndef BOOST_LCAST_NO_WCHAR_T
+        template<>
+        struct lcast_src_length< wchar_t, std::basic_string<wchar_t> >
+        {
+            BOOST_STATIC_CONSTANT(std::size_t, value = 1);
+            static void check_coverage() {}
+        };
+#endif
+#endif
+
+        // 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_integral
+        {
+#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
+        };
+
+#define BOOST_LCAST_DEF1(CharT, T)               \
+    template<> struct lcast_src_length<CharT, T> \
+        : lcast_src_length_integral<T>           \
+    { static void check_coverage() {} };
+
+#ifdef BOOST_LCAST_NO_WCHAR_T
+#define BOOST_LCAST_DEF(T) BOOST_LCAST_DEF1(char, T)
+#else
+#define BOOST_LCAST_DEF(T)          \
+        BOOST_LCAST_DEF1(char, T)   \
+        BOOST_LCAST_DEF1(wchar_t, T)
+#endif
+
+        BOOST_LCAST_DEF(short)
+        BOOST_LCAST_DEF(unsigned short)
+        BOOST_LCAST_DEF(int)
+        BOOST_LCAST_DEF(unsigned int)
+        BOOST_LCAST_DEF(long)
+        BOOST_LCAST_DEF(unsigned long)
+#if defined(BOOST_HAS_LONG_LONG)
+        BOOST_LCAST_DEF(boost::ulong_long_type)
+        BOOST_LCAST_DEF(boost::long_long_type )
+#elif defined(BOOST_HAS_MS_INT64)
+        BOOST_LCAST_DEF(unsigned __int64)
+        BOOST_LCAST_DEF(         __int64)
+#endif
+
+#undef BOOST_LCAST_DEF
+#undef BOOST_LCAST_DEF1
+
+#ifndef BOOST_LCAST_NO_COMPILE_TIME_PRECISION
+        // 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_floating
+        {
+            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
+                );
+        };
+
+        template<>
+        struct lcast_src_length<char,float>
+          : lcast_src_length_floating<float>
+        {
+            static void check_coverage() {}
+        };
+
+        template<>
+        struct lcast_src_length<char,double>
+          : lcast_src_length_floating<double>
+        {
+            static void check_coverage() {}
+        };
+
+        template<>
+        struct lcast_src_length<char,long double>
+          : lcast_src_length_floating<long double>
+        {
+            static void check_coverage() {}
+        };
+
+#ifndef BOOST_LCAST_NO_WCHAR_T
+    template<>
+    struct lcast_src_length<wchar_t,float>
+      : lcast_src_length_floating<float>
+    {
+        static void check_coverage() {}
+    };
+
+    template<>
+    struct lcast_src_length<wchar_t,double>
+      : lcast_src_length_floating<double>
+    {
+        static void check_coverage() {}
+    };
+
+    template<>
+    struct lcast_src_length<wchar_t,long double>
+      : lcast_src_length_floating<long double>
+    {
+        static void check_coverage() {}
+    };
+
+#endif // #ifndef BOOST_LCAST_NO_WCHAR_T
+#endif // #ifndef BOOST_LCAST_NO_COMPILE_TIME_PRECISION
+    }
+
+    namespace detail // '0' and '-' constants
+    {
+        template<typename CharT> struct lcast_char_constants;
+
+        template<>
+        struct lcast_char_constants<char>
+        {
+            BOOST_STATIC_CONSTANT(char, zero  = '0');
+            BOOST_STATIC_CONSTANT(char, minus = '-');
+        };
+
+#ifndef BOOST_LCAST_NO_WCHAR_T
+        template<>
+        struct lcast_char_constants<wchar_t>
+        {
+            BOOST_STATIC_CONSTANT(wchar_t, zero  = L'0');
+            BOOST_STATIC_CONSTANT(wchar_t, minus = L'-');
+        };
+#endif
+    }
+
+    namespace detail // lexical_streambuf_fake
+    {
+        struct lexical_streambuf_fake
+        {
+        };
+    }
+
+    namespace detail // lcast_to_unsigned
+    {
+#if (defined _MSC_VER)
+# pragma warning( push )
+// C4146: unary minus operator applied to unsigned type, result still unsigned
+# pragma warning( disable : 4146 )
+#elif defined( __BORLANDC__ )
+# pragma option push -w-8041
+#endif
+        template<class T>
+        inline
+        BOOST_DEDUCED_TYPENAME make_unsigned<T>::type lcast_to_unsigned(T value)
+        {
+            typedef BOOST_DEDUCED_TYPENAME make_unsigned<T>::type result_type;
+            result_type uvalue = static_cast<result_type>(value);
+            return value < 0 ? -uvalue : uvalue;
+        }
+#if (defined _MSC_VER)
+# pragma warning( pop )
+#elif defined( __BORLANDC__ )
+# pragma option pop
+#endif
+    }
+
+    namespace detail // lcast_put_unsigned
+    {
+        template<class Traits, class T, class CharT>
+        CharT* lcast_put_unsigned(T n, CharT* finish)
+        {
+#ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
+            BOOST_STATIC_ASSERT(!std::numeric_limits<T>::is_signed);
+#endif
+
+#ifndef BOOST_LEXICAL_CAST_ASSUME_C_LOCALE
+            // TODO: use BOOST_NO_STD_LOCALE
+            std::locale loc;
+            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();
+            CharT thousands_sep = grouping_size ? np.thousands_sep() : 0;
+            std::string::size_type group = 0; // current group number
+            char last_grp_size = grouping[0] <= 0 ? CHAR_MAX : grouping[0];
+            // a) Since grouping is const, grouping[grouping.size()] returns 0.
+            // b) It's safe to assume here and below that CHAR_MAX
+            //    is equivalent to unlimited grouping:
+#ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
+            BOOST_STATIC_ASSERT(std::numeric_limits<T>::digits10 < CHAR_MAX);
+#endif
+
+            char left = last_grp_size;
+#endif
+
+            typedef typename Traits::int_type int_type;
+            CharT const czero = lcast_char_constants<CharT>::zero;
+            int_type const zero = Traits::to_int_type(czero);
+
+            do
+            {
+#ifndef BOOST_LEXICAL_CAST_ASSUME_C_LOCALE
+                if(left == 0)
+                {
+                    ++group;
+                    if(group < grouping_size)
+                    {
+                        char const grp_size = grouping[group];
+                        last_grp_size = grp_size <= 0 ? CHAR_MAX : grp_size;
+                    }
+
+                    left = last_grp_size;
+                    --finish;
+                    Traits::assign(*finish, thousands_sep);
+                }
+
+                --left;
+#endif
+
+                --finish;
+                int_type const digit = static_cast<int_type>(n % 10U);
+                Traits::assign(*finish, Traits::to_char_type(zero + digit));
+                n /= 10;
+            } while(n);
+
+            return finish;
+        }
+    }
+
+    namespace detail // 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, (Source*)0, (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() ==
+#if defined(__GNUC__) && (__GNUC__<3) && defined(BOOST_NO_STD_WSTRING)
+// GCC 2.9x lacks std::char_traits<>::eof().
+// We use BOOST_NO_STD_WSTRING to filter out STLport and libstdc++-v3
+// configurations, which do provide std::char_traits<>::eof().
+    
+                           EOF;
+#else
+                           traits_type::eof();
+#endif
+            }
+
+#ifdef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+
+            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
+
+#else
+            bool operator>>(std::basic_string<char_type,traits_type>& output)
+            {
+                stream.str().swap(output);
+                return true;
+            }
+
+            template<class Alloc>
+            bool operator>>(std::basic_string<char_type,traits_type,Alloc>& out)
+            {
+                std::basic_string<char_type,traits_type> str(stream.str());
+                out.assign(str.begin(), str.end());
+                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
+        };
+    }
+
+    namespace detail // optimized stream wrapper
+    {
+        // String representation of Source has an upper limit.
+        template< class CharT // a result of widest_char transformation
+                , class Base // lexical_streambuf_fake or basic_streambuf<CharT>
+                , class Traits // usually char_traits<CharT>
+                >
+        class lexical_stream_limited_src : public Base
+        {
+            // A string representation of Source is written to [start, finish).
+            // Currently, it is assumed that [start, finish) is big enough
+            // to hold a string representation of any Source value.
+            CharT* start;
+            CharT* finish;
+
+        private:
+
+            static void widen_and_assign(char*p, char ch)
+            {
+                Traits::assign(*p, ch);
+            }
+
+#ifndef BOOST_LCAST_NO_WCHAR_T
+            static void widen_and_assign(wchar_t* p, char ch)
+            {
+                // TODO: use BOOST_NO_STD_LOCALE
+                std::locale loc;
+                wchar_t w = BOOST_USE_FACET(std::ctype<wchar_t>, loc).widen(ch);
+                Traits::assign(*p, w);
+            }
+
+            static void widen_and_assign(wchar_t* p, wchar_t ch)
+            {
+                Traits::assign(*p, ch);
+            }
+
+            static void widen_and_assign(char*, wchar_t ch); // undefined
+#endif
+
+            template<class OutputStreamable>
+            bool lcast_put(const OutputStreamable& input)
+            {
+                this->setp(start, finish);
+                std::basic_ostream<CharT> stream(static_cast<Base*>(this));
+                lcast_set_precision(stream, (OutputStreamable*)0);
+                bool const result = !(stream << input).fail();
+                finish = this->pptr();
+                return result;
+            }
+
+            // Undefined:
+            lexical_stream_limited_src(lexical_stream_limited_src const&);
+            void operator=(lexical_stream_limited_src const&);
+
+        public:
+
+            lexical_stream_limited_src(CharT* sta, CharT* fin)
+              : start(sta)
+              , finish(fin)
+            {}
+
+        public: // output
+
+            template<class Alloc>
+            bool operator<<(std::basic_string<CharT,Traits,Alloc> const& str)
+            {
+                start = const_cast<CharT*>(str.data());
+                finish = start + str.length();
+                return true;
+            }
+
+            bool operator<<(bool);
+            bool operator<<(char);
+#if !defined(BOOST_LCAST_NO_WCHAR_T) && !defined(BOOST_NO_INTRINSIC_WCHAR_T)
+            bool operator<<(wchar_t);
+#endif
+            bool operator<<(CharT const*);
+            bool operator<<(short);
+            bool operator<<(int);
+            bool operator<<(long);
+            bool operator<<(unsigned short);
+            bool operator<<(unsigned int);
+            bool operator<<(unsigned long);
+#if defined(BOOST_HAS_LONG_LONG)
+            bool operator<<(boost::ulong_long_type);
+            bool operator<<(boost::long_long_type );
+#elif defined(BOOST_HAS_MS_INT64)
+            bool operator<<(unsigned __int64);
+            bool operator<<(         __int64);
+#endif
+            // These three operators use ostream and streambuf.
+            // lcast_streambuf_for_source<T>::value is true.
+            bool operator<<(float);
+            bool operator<<(double);
+            bool operator<<(long double);
+
+        public: // input
+
+            // Generic istream-based algorithm.
+            // lcast_streambuf_for_target<InputStreamable>::value is true.
+            template<typename InputStreamable>
+            bool operator>>(InputStreamable& output)
+            {
+#if (defined _MSC_VER)
+# pragma warning( push )
+  // conditional expression is constant
+# pragma warning( disable : 4127 )
+#endif
+                if(is_pointer<InputStreamable>::value)
+                    return false;
+
+                this->setg(start, start, finish);
+                std::basic_istream<CharT> stream(static_cast<Base*>(this));
+                stream.unsetf(std::ios::skipws);
+                lcast_set_precision(stream, (InputStreamable*)0);
+#if (defined _MSC_VER)
+# pragma warning( pop )
+#endif
+                return stream >> output &&
+                    stream.get() ==
+#if defined(__GNUC__) && (__GNUC__<3) && defined(BOOST_NO_STD_WSTRING)
+        // GCC 2.9x lacks std::char_traits<>::eof().
+        // We use BOOST_NO_STD_WSTRING to filter out STLport and libstdc++-v3
+        // configurations, which do provide std::char_traits<>::eof().
+
+                    EOF;
+#else
+                Traits::eof();
+#endif
+            }
+
+            bool operator>>(CharT&);
+
+#ifdef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+// This #if is in sync with lcast_streambuf_for_target
+
+            bool operator>>(std::string&);
+
+#ifndef BOOST_LCAST_NO_WCHAR_T
+            bool operator>>(std::wstring&);
+#endif
+
+#else
+            template<class Alloc>
+            bool operator>>(std::basic_string<CharT,Traits,Alloc>& str)
+            {
+                str.assign(start, finish);
+                return true;
+            }
+#endif
+        };
+
+        template<typename CharT, class Base, class Traits>
+        inline bool lexical_stream_limited_src<CharT,Base,Traits>::operator<<(
+                bool value)
+        {
+            typedef typename Traits::int_type int_type;
+            CharT const czero = lcast_char_constants<CharT>::zero;
+            int_type const zero = Traits::to_int_type(czero);
+            Traits::assign(*start, Traits::to_char_type(zero + value));
+            finish = start + 1;
+            return true;
+        }
+
+        template<typename CharT, class Base, class Traits>
+        inline bool lexical_stream_limited_src<CharT,Base,Traits>::operator<<(
+                char ch)
+        {
+            widen_and_assign(start, ch);
+            finish = start + 1;
+            return true;
+        }
+
+#if !defined(BOOST_LCAST_NO_WCHAR_T) && !defined(BOOST_NO_INTRINSIC_WCHAR_T)
+        template<typename CharT, class Base, class Traits>
+        inline bool lexical_stream_limited_src<CharT,Base,Traits>::operator<<(
+                wchar_t ch)
+        {
+            widen_and_assign(start, ch);
+            finish = start + 1;
+            return true;
+        }
+#endif
+
+        template<typename CharT, class Base, class Traits>
+        inline bool lexical_stream_limited_src<CharT,Base,Traits>::operator<<(
+                short n)
+        {
+            start = lcast_put_unsigned<Traits>(lcast_to_unsigned(n), finish);
+            if(n < 0)
+            {
+                --start;
+                CharT const minus = lcast_char_constants<CharT>::minus;
+                Traits::assign(*start, minus);
+            }
+            return true;
+        }
+
+        template<typename CharT, class Base, class Traits>
+        inline bool lexical_stream_limited_src<CharT,Base,Traits>::operator<<(
+                int n)
+        {
+            start = lcast_put_unsigned<Traits>(lcast_to_unsigned(n), finish);
+            if(n < 0)
+            {
+                --start;
+                CharT const minus = lcast_char_constants<CharT>::minus;
+                Traits::assign(*start, minus);
+            }
+            return true;
+        }
+
+        template<typename CharT, class Base, class Traits>
+        inline bool lexical_stream_limited_src<CharT,Base,Traits>::operator<<(
+                long n)
+        {
+            start = lcast_put_unsigned<Traits>(lcast_to_unsigned(n), finish);
+            if(n < 0)
+            {
+                --start;
+                CharT const minus = lcast_char_constants<CharT>::minus;
+                Traits::assign(*start, minus);
+            }
+            return true;
+        }
+
+#if defined(BOOST_HAS_LONG_LONG)
+        template<typename CharT, class Base, class Traits>
+        inline bool lexical_stream_limited_src<CharT,Base,Traits>::operator<<(
+                boost::long_long_type n)
+        {
+            start = lcast_put_unsigned<Traits>(lcast_to_unsigned(n), finish);
+            if(n < 0)
+            {
+                --start;
+                CharT const minus = lcast_char_constants<CharT>::minus;
+                Traits::assign(*start, minus);
+            }
+            return true;
+        }
+#elif defined(BOOST_HAS_MS_INT64)
+        template<typename CharT, class Base, class Traits>
+        inline bool lexical_stream_limited_src<CharT,Base,Traits>::operator<<(
+                __int64 n)
+        {
+            start = lcast_put_unsigned<Traits>(lcast_to_unsigned(n), finish);
+            if(n < 0)
+            {
+                --start;
+                CharT const minus = lcast_char_constants<CharT>::minus;
+                Traits::assign(*start, minus);
+            }
+            return true;
+        }
+#endif
+
+        template<typename CharT, class Base, class Traits>
+        inline bool lexical_stream_limited_src<CharT,Base,Traits>::operator<<(
+                unsigned short n)
+        {
+            start = lcast_put_unsigned<Traits>(n, finish);
+            return true;
+        }
+
+        template<typename CharT, class Base, class Traits>
+        inline bool lexical_stream_limited_src<CharT,Base,Traits>::operator<<(
+                unsigned int n)
+        {
+            start = lcast_put_unsigned<Traits>(n, finish);
+            return true;
+        }
+
+        template<typename CharT, class Base, class Traits>
+        inline bool lexical_stream_limited_src<CharT,Base,Traits>::operator<<(
+                unsigned long n)
+        {
+            start = lcast_put_unsigned<Traits>(n, finish);
+            return true;
+        }
+
+#if defined(BOOST_HAS_LONG_LONG)
+        template<typename CharT, class Base, class Traits>
+        inline bool lexical_stream_limited_src<CharT,Base,Traits>::operator<<(
+                boost::ulong_long_type n)
+        {
+            start = lcast_put_unsigned<Traits>(n, finish);
+            return true;
+        }
+#elif defined(BOOST_HAS_MS_INT64)
+        template<typename CharT, class Base, class Traits>
+        inline bool lexical_stream_limited_src<CharT,Base,Traits>::operator<<(
+                unsigned __int64 n)
+        {
+            start = lcast_put_unsigned<Traits>(n, finish);
+            return true;
+        }
+#endif
+
+        template<typename CharT, class Base, class Traits>
+        inline bool lexical_stream_limited_src<CharT,Base,Traits>::operator<<(
+                float val)
+        {
+            return this->lcast_put(val);
+        }
+
+        template<typename CharT, class Base, class Traits>
+        inline bool lexical_stream_limited_src<CharT,Base,Traits>::operator<<(
+                double val)
+        {
+            return this->lcast_put(val);
+        }
+
+        template<typename CharT, class Base, class Traits>
+        inline bool lexical_stream_limited_src<CharT,Base,Traits>::operator<<(
+                long double val)
+        {
+            return this->lcast_put(val);
+        }
+
+        template<typename CharT, class Base, class Traits>
+        inline bool lexical_stream_limited_src<CharT,Base,Traits>::operator<<(
+                CharT const* str)
+        {
+            start = const_cast<CharT*>(str);
+            finish = start + Traits::length(str);
+            return true;
+        }
+
+        template<typename CharT, class Base, class Traits>
+        inline bool lexical_stream_limited_src<CharT,Base,Traits>::operator>>(
+                CharT& output)
+        {
+            bool const ok = (finish - start == 1);
+            if(ok)
+                Traits::assign(output, *start);
+            return ok;
+        }
+
+#ifdef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+        template<typename CharT, class Base, class Traits>
+        inline bool lexical_stream_limited_src<CharT,Base,Traits>::operator>>(
+                std::string& str)
+        {
+            str.assign(start, finish);
+            return true;
+        }
+
+#ifndef BOOST_LCAST_NO_WCHAR_T
+        template<typename CharT, class Base, class Traits>
+        inline bool lexical_stream_limited_src<CharT,Base,Traits>::operator>>(
+                std::wstring& str)
+        {
+            str.assign(start, finish);
+            return true;
+        }
+#endif
+#endif
+    }
+
+    namespace detail // lcast_streambuf_for_source
+    {
+        // Returns true if optimized stream wrapper needs ostream for writing.
+        template<class Source>
+        struct lcast_streambuf_for_source
+        {
+            BOOST_STATIC_CONSTANT(bool, value = false);
+        };
+
+        template<>
+        struct lcast_streambuf_for_source<float>
+        {
+            BOOST_STATIC_CONSTANT(bool, value = true);
+        };
+ 
+        template<>
+        struct lcast_streambuf_for_source<double>
+        {
+            BOOST_STATIC_CONSTANT(bool, value = true);
+        };
+  
+        template<>
+        struct lcast_streambuf_for_source<long double>
+        {
+            BOOST_STATIC_CONSTANT(bool, value = true);
+        };
+    }
+
+    namespace detail // lcast_streambuf_for_target
+    {
+        // Returns true if optimized stream wrapper needs istream for reading.
+        template<class Target>
+        struct lcast_streambuf_for_target
+        {
+            BOOST_STATIC_CONSTANT(bool, value = true);
+        };
+
+        template<>
+        struct lcast_streambuf_for_target<char>
+        {
+            BOOST_STATIC_CONSTANT(bool, value = false);
+        };
+
+#if !defined(BOOST_LCAST_NO_WCHAR_T) && !defined(BOOST_NO_INTRINSIC_WCHAR_T)
+        template<>
+        struct lcast_streambuf_for_target<wchar_t>
+        {
+            BOOST_STATIC_CONSTANT(bool, value = false);
+        };
+#endif
+
+#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+        template<class Traits, class Alloc>
+        struct lcast_streambuf_for_target<
+                    std::basic_string<char,Traits,Alloc> >
+        {
+            BOOST_STATIC_CONSTANT(bool, value = false);
+        };
+
+#ifndef BOOST_LCAST_NO_WCHAR_T
+        template<class Traits, class Alloc>
+        struct lcast_streambuf_for_target<
+                    std::basic_string<wchar_t,Traits,Alloc> >
+        {
+            BOOST_STATIC_CONSTANT(bool, value = false);
+        };
+#endif
+#else
+        template<>
+        struct lcast_streambuf_for_target<std::string>
+        {
+            BOOST_STATIC_CONSTANT(bool, value = false);
+        };
+
+#ifndef BOOST_LCAST_NO_WCHAR_T
+        template<>
+        struct lcast_streambuf_for_target<std::wstring>
+        {
+            BOOST_STATIC_CONSTANT(bool, value = false);
+        };
+#endif
+#endif
+    }
+
+    #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+
+    // call-by-const reference version
+
+    namespace detail
+    {
+        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;
+        };
+
+        template< typename Target
+                , typename Source
+                , bool Unlimited // string representation of Source is unlimited
+                , typename CharT
+                >
+        Target lexical_cast(
+            BOOST_DEDUCED_TYPENAME boost::call_traits<Source>::param_type arg,
+            CharT* buf, std::size_t src_len)
+        {
+            typedef BOOST_DEDUCED_TYPENAME
+                deduce_char_traits<CharT,Target,Source>::type traits;
+
+            typedef BOOST_DEDUCED_TYPENAME boost::mpl::if_c<
+                lcast_streambuf_for_target<Target>::value ||
+                lcast_streambuf_for_source<Source>::value
+              , std::basic_streambuf<CharT>
+              , lexical_streambuf_fake
+              >::type base;
+
+            BOOST_DEDUCED_TYPENAME boost::mpl::if_c<
+                Unlimited
+              , detail::lexical_stream<Target,Source,traits>
+              , detail::lexical_stream_limited_src<CharT,base,traits>
+              >::type interpreter(buf, buf + src_len);
+
+            // The original form, reproduced below, is more elegant
+            // but yields a spurious C4701 warning ("possible use of
+            // "result" before initialization") with VC7.1 (/W4).
+//
+//            Target result;
+//
+//            if(!(interpreter << arg && interpreter >> result))
+//                throw_exception(bad_lexical_cast(typeid(Source), typeid(Target)));
+//            return result;
+
+            if(interpreter << arg) {
+                Target result;
+                if (interpreter >> result)
+                    return result;
+            }
+#ifndef BOOST_NO_TYPEID
+            throw_exception(bad_lexical_cast(typeid(Source), typeid(Target)));
+#else
+            throw_exception(bad_lexical_cast());
+#endif
+            return Target(); // normally never reached (throw_exception)
+        }
+    }
+
+    template<typename Target, typename Source>
+    inline Target lexical_cast(const Source &arg)
+    {
+        typedef typename detail::array_to_pointer_decay<Source>::type src;
+
+        typedef typename detail::widest_char<
+            typename detail::stream_char<Target>::type
+          , typename detail::stream_char<src>::type
+          >::type char_type;
+
+        typedef detail::lcast_src_length<char_type, src> lcast_src_length;
+        std::size_t const src_len = lcast_src_length::value;
+        char_type buf[src_len + 1];
+        lcast_src_length::check_coverage();
+        return detail::lexical_cast<Target, src, !src_len>(arg, buf, src_len);
+    }
+
+    #else
+
+    // 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))
+#ifndef BOOST_NO_TYPEID
+            throw_exception(bad_lexical_cast(typeid(Source), typeid(Target)));
+#else
+            throw_exception(bad_lexical_cast());
+#endif
+        return result;
+    }
+
+    #endif
+}
+
+// Copyright Kevlin Henney, 2000-2005.
+// Copyright Alexander Nasonov, 2006-2007.
+//
+// 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)
+
+#undef BOOST_LCAST_NO_WCHAR_T
+#endif