diff options
Diffstat (limited to 'boost/lexical_cast.hpp')
| -rw-r--r-- | boost/lexical_cast.hpp | 2456 |
1 files changed, 57 insertions, 2399 deletions
diff --git a/boost/lexical_cast.hpp b/boost/lexical_cast.hpp index acfc3e85f0..dc3d7e3fb7 100644 --- a/boost/lexical_cast.hpp +++ b/boost/lexical_cast.hpp @@ -1,16 +1,10 @@ -#ifndef BOOST_LEXICAL_CAST_INCLUDED -#define BOOST_LEXICAL_CAST_INCLUDED - -// MS compatible compilers support #pragma once - -#if defined(_MSC_VER) && (_MSC_VER >= 1020) -# pragma once -#endif - -// Boost lexical_cast.hpp header -------------------------------------------// +// Copyright Kevlin Henney, 2000-2005. +// Copyright Alexander Nasonov, 2006-2010. +// Copyright Antony Polukhin, 2011-2014. // -// See http://www.boost.org/libs/conversion for documentation. -// See end of this header for rights and permissions. +// 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, @@ -18,2429 +12,93 @@ // 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 and other Boosters -// when: November 2000, March 2003, June 2005, June 2006, March 2011 - 2012 - -#include <boost/config.hpp> -#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 <typeinfo> -#include <exception> -#include <boost/limits.hpp> -#include <boost/mpl/if.hpp> -#include <boost/throw_exception.hpp> -#include <boost/type_traits/ice.hpp> -#include <boost/type_traits/is_pointer.hpp> -#include <boost/static_assert.hpp> -#include <boost/detail/lcast_precision.hpp> -#include <boost/detail/workaround.hpp> +// 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 -#ifndef BOOST_NO_STD_LOCALE -# include <locale> -#else -# ifndef BOOST_LEXICAL_CAST_ASSUME_C_LOCALE -# warning "Unable to use <locale> header. boost::lexical_cast will use the 'C' locale." -# define BOOST_LEXICAL_CAST_ASSUME_C_LOCALE -# endif +#include <boost/config.hpp> +#ifdef BOOST_HAS_PRAGMA_ONCE +# pragma once #endif -#ifdef BOOST_NO_STRINGSTREAM -#include <strstream> -#else -#include <sstream> +#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING) +#define BOOST_LCAST_NO_WCHAR_T #endif -#ifdef BOOST_NO_TYPEID -#define BOOST_LCAST_THROW_BAD_CAST(S, T) throw_exception(bad_lexical_cast()) -#else -#define BOOST_LCAST_THROW_BAD_CAST(Source, Target) \ - throw_exception(bad_lexical_cast(typeid(Source), typeid(Target))) -#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 +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 - + template <typename Target, typename Source> + inline Target lexical_cast(const Source &arg) { - 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; - } + Target result; - virtual const char *what() const throw() - { - return "bad lexical cast: " - "source type value could not be interpreted as target"; - } - virtual ~bad_lexical_cast() throw() - { + if (!boost::conversion::detail::try_lexical_convert(arg, result)) { + boost::conversion::detail::throw_bad_cast<Source, Target>(); } - private: - const std::type_info *source; - const std::type_info *target; - }; - - namespace detail // widest_char - { - 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 - -#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) && !defined(__SUNPRO_CC) && !defined(__PGIC__) - -#include <cmath> -#include <istream> - -#if !defined(BOOST_NO_CXX11_HDR_ARRAY) && defined(BOOST_HAS_TR1_ARRAY) -#include <array> -#endif - -#include <boost/array.hpp> -#include <boost/numeric/conversion/cast.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/remove_pointer.hpp> -#include <boost/math/special_functions/sign.hpp> -#include <boost/math/special_functions/fpclassify.hpp> -#include <boost/range/iterator_range_core.hpp> -#include <boost/container/container_fwd.hpp> -#ifndef BOOST_NO_CWCHAR -# include <cwchar> -#endif - -namespace boost { - namespace detail // widest_char<...> (continuation) - { - struct not_a_character_type{}; - - template <typename CharT> - struct widest_char<not_a_character_type, CharT > - { - typedef CharT type; - }; - - template <typename CharT> - struct widest_char< CharT, not_a_character_type > - { - typedef CharT type; - }; - - template <> - struct widest_char< not_a_character_type, not_a_character_type > - { - typedef char type; - }; - } - - namespace detail // is_char_or_wchar<...> and stream_char<...> templates - { - // returns true, if T is one of the character types - template <typename T> - struct is_char_or_wchar - { - typedef ::boost::type_traits::ice_or< - ::boost::is_same< T, char >::value, - #ifndef BOOST_LCAST_NO_WCHAR_T - ::boost::is_same< T, wchar_t >::value, - #endif - #ifndef BOOST_NO_CHAR16_T - ::boost::is_same< T, char16_t >::value, - #endif - #ifndef BOOST_NO_CHAR32_T - ::boost::is_same< T, char32_t >::value, - #endif - ::boost::is_same< T, unsigned char >::value, - ::boost::is_same< T, signed char >::value - > result_type; - - BOOST_STATIC_CONSTANT(bool, value = (result_type::value) ); - }; - - // selectors for choosing stream character type - // returns one of char, wchar_t, char16_t, char32_t or not_a_character_type types - template <typename Type> - struct stream_char - { - typedef BOOST_DEDUCED_TYPENAME boost::mpl::if_c< - is_char_or_wchar<Type >::value, - Type, - boost::detail::not_a_character_type - >::type type; - }; - - template <> - struct stream_char<unsigned char> - { - typedef char type; - }; - - template <> - struct stream_char<signed char> - { - typedef char type; - }; - - template <typename CharT> - struct stream_char<CharT*> - { - typedef BOOST_DEDUCED_TYPENAME stream_char<CharT>::type type; - }; - - template <typename CharT> - struct stream_char<const CharT*> - { - typedef BOOST_DEDUCED_TYPENAME stream_char<CharT>::type type; - }; - - template <typename CharT> - struct stream_char<iterator_range<CharT*> > - { - typedef BOOST_DEDUCED_TYPENAME stream_char<CharT*>::type type; - }; - - template <typename CharT> - struct stream_char<iterator_range<const CharT*> > - { - typedef BOOST_DEDUCED_TYPENAME stream_char<const CharT*>::type type; - }; - - template <class CharT, class Traits, class Alloc> - struct stream_char< std::basic_string<CharT, Traits, Alloc> > - { - typedef CharT type; - }; - - template <class CharT, class Traits, class Alloc> - struct stream_char< ::boost::container::basic_string<CharT, Traits, Alloc> > - { - typedef CharT type; - }; - - template<typename CharT, std::size_t N> - struct stream_char<boost::array<CharT, N> > - { - typedef BOOST_DEDUCED_TYPENAME stream_char<CharT>::type type; - }; - - template<typename CharT, std::size_t N> - struct stream_char<boost::array<const CharT, N> > - { - typedef BOOST_DEDUCED_TYPENAME stream_char<CharT>::type type; - }; - -#if !defined(BOOST_NO_CXX11_HDR_ARRAY) && defined(BOOST_HAS_TR1_ARRAY) - template <typename CharT, std::size_t N> - struct stream_char<std::array<CharT, N> > - { - typedef BOOST_DEDUCED_TYPENAME stream_char<CharT>::type type; - }; - - template <typename CharT, std::size_t N> - struct stream_char<std::array<const CharT, N> > - { - typedef BOOST_DEDUCED_TYPENAME stream_char<CharT>::type type; - }; -#endif // !defined(BOOST_NO_CXX11_HDR_ARRAY) && defined(BOOST_HAS_TR1_ARRAY) - -#if !defined(BOOST_LCAST_NO_WCHAR_T) && defined(BOOST_NO_INTRINSIC_WCHAR_T) - template<> - struct stream_char<wchar_t> - { - typedef boost::detail::not_a_character_type type; - }; - - template<> - struct stream_char<wchar_t*> - { - typedef wchar_t type; - }; - - template<> - struct stream_char<const wchar_t*> - { - typedef wchar_t type; - }; -#endif - } - - namespace detail // deduce_char_traits template - { - - 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 Alloc, class Source> - struct deduce_char_traits< CharT - , ::boost::container::basic_string<CharT,Traits,Alloc> - , Source - > - { - typedef Traits type; - }; - - template<class CharT, class Target, class Traits, class Alloc> - struct deduce_char_traits< CharT - , Target - , ::boost::container::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; - }; - - template<class CharT, class Traits, class Alloc1, class Alloc2> - struct deduce_char_traits< CharT - , ::boost::container::basic_string<CharT,Traits,Alloc1> - , ::boost::container::basic_string<CharT,Traits,Alloc2> - > - { - typedef Traits type; - }; - - template<class CharT, class Traits, class Alloc1, class Alloc2> - struct deduce_char_traits< CharT - , ::boost::container::basic_string<CharT,Traits,Alloc1> - , ::std::basic_string<CharT,Traits,Alloc2> - > - { - typedef Traits type; - }; - - template<class CharT, class Traits, class Alloc1, class Alloc2> - struct deduce_char_traits< CharT - , ::std::basic_string<CharT,Traits,Alloc1> - , ::boost::container::basic_string<CharT,Traits,Alloc2> - > - { - typedef Traits type; - }; - } - - namespace detail // lcast_src_length - { - // Return max. length of string representation of Source; - template< class Source // Source type of lexical_cast. - > - struct lcast_src_length - { - BOOST_STATIC_CONSTANT(std::size_t, value = 1); - // To check coverage, build the test with - // bjam --v2 profile optimization=off - static void check_coverage() {} - }; - - // 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_DEF(T) \ - template<> struct lcast_src_length<T> \ - : lcast_src_length_integral<T> \ - { static void check_coverage() {} }; - - 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 - -#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<float> - : lcast_src_length_floating<float> - { - static void check_coverage() {} - }; - - template<> - struct lcast_src_length<double> - : lcast_src_length_floating<double> - { - static void check_coverage() {} - }; - - template<> - struct lcast_src_length<long double> - : lcast_src_length_floating<long double> - { - static void check_coverage() {} - }; - -#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 = '-'); - BOOST_STATIC_CONSTANT(char, plus = '+'); - BOOST_STATIC_CONSTANT(char, lowercase_e = 'e'); - BOOST_STATIC_CONSTANT(char, capital_e = 'E'); - BOOST_STATIC_CONSTANT(char, c_decimal_separator = '.'); - }; - -#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'-'); - BOOST_STATIC_CONSTANT(wchar_t, plus = L'+'); - BOOST_STATIC_CONSTANT(wchar_t, lowercase_e = L'e'); - BOOST_STATIC_CONSTANT(wchar_t, capital_e = L'E'); - BOOST_STATIC_CONSTANT(wchar_t, c_decimal_separator = L'.'); - }; -#endif - -#if !defined(BOOST_NO_CHAR16_T) && !defined(BOOST_NO_UNICODE_LITERALS) - template<> - struct lcast_char_constants<char16_t> - { - BOOST_STATIC_CONSTANT(char16_t, zero = u'0'); - BOOST_STATIC_CONSTANT(char16_t, minus = u'-'); - BOOST_STATIC_CONSTANT(char16_t, plus = u'+'); - BOOST_STATIC_CONSTANT(char16_t, lowercase_e = u'e'); - BOOST_STATIC_CONSTANT(char16_t, capital_e = u'E'); - BOOST_STATIC_CONSTANT(char16_t, c_decimal_separator = u'.'); - }; -#endif -#if !defined(BOOST_NO_CHAR32_T) && !defined(BOOST_NO_UNICODE_LITERALS) - template<> - struct lcast_char_constants<char32_t> - { - BOOST_STATIC_CONSTANT(char32_t, zero = U'0'); - BOOST_STATIC_CONSTANT(char32_t, minus = U'-'); - BOOST_STATIC_CONSTANT(char32_t, plus = U'+'); - BOOST_STATIC_CONSTANT(char32_t, lowercase_e = U'e'); - BOOST_STATIC_CONSTANT(char32_t, capital_e = U'E'); - BOOST_STATIC_CONSTANT(char32_t, c_decimal_separator = U'.'); - }; -#endif + return result; } - namespace detail // lcast_to_unsigned + template <typename Target> + inline Target lexical_cast(const char* chars, std::size_t count) { -#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 + return ::boost::lexical_cast<Target>( + ::boost::iterator_range<const char*>(chars, chars + count) + ); } - namespace detail // lcast_put_unsigned + template <typename Target> + inline Target lexical_cast(const unsigned char* chars, std::size_t count) { - template<class Traits, class T, class CharT> - CharT* lcast_put_unsigned(const T n_param, CharT* finish) - { -#ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS - BOOST_STATIC_ASSERT(!std::numeric_limits<T>::is_signed); -#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); - BOOST_DEDUCED_TYPENAME boost::mpl::if_c< - (sizeof(int_type) > sizeof(T)) - , int_type - , T - >::type n = n_param; - -#ifndef BOOST_LEXICAL_CAST_ASSUME_C_LOCALE - std::locale loc; - if (loc != std::locale::classic()) { - 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 ) - { - -#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 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 ? CHAR_MAX : grp_size; - } - - left = last_grp_size; - --finish; - Traits::assign(*finish, thousands_sep); - } - - --left; - - --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; - } - } -#endif - { - do - { - --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; - } + return ::boost::lexical_cast<Target>( + ::boost::iterator_range<const unsigned char*>(chars, chars + count) + ); } - namespace detail // lcast_ret_unsigned + template <typename Target> + inline Target lexical_cast(const signed char* chars, std::size_t count) { - template<class Traits, class T, class CharT> - inline bool lcast_ret_unsigned(T& value, const CharT* const begin, const CharT* end) - { -#ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS - BOOST_STATIC_ASSERT(!std::numeric_limits<T>::is_signed); -#endif - typedef typename Traits::int_type int_type; - CharT const czero = lcast_char_constants<CharT>::zero; - --end; - value = 0; - - if (begin > end || *end < czero || *end >= czero + 10) - return false; - value = *end - czero; - --end; - T multiplier = 1; - bool multiplier_overflowed = false; - -#ifndef BOOST_LEXICAL_CAST_ASSUME_C_LOCALE - std::locale loc; - if (loc != std::locale::classic()) { - 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) - { - unsigned char current_grouping = 0; - CharT const thousands_sep = np.thousands_sep(); - char remained = grouping[current_grouping] - 1; - bool shall_we_return = true; - - for(;end>=begin; --end) - { - if (remained) { - T const multiplier_10 = multiplier * 10; - if (multiplier_10 / 10 != multiplier) multiplier_overflowed = true; - - T const dig_value = *end - czero; - T const new_sub_value = multiplier_10 * dig_value; - - if (*end < czero || *end >= czero + 10 - /* detecting overflow */ - || (dig_value && new_sub_value / dig_value != multiplier_10) - || static_cast<T>((std::numeric_limits<T>::max)()-new_sub_value) < value - || (multiplier_overflowed && dig_value) - ) - return false; - - value += new_sub_value; - multiplier *= 10; - --remained; - } else { - if ( !Traits::eq(*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 - */ - shall_we_return = false; - break; - } else { - if ( begin == end ) return false; - if (current_grouping < grouping_size-1 ) ++current_grouping; - remained = grouping[current_grouping]; - } - } - } - - if (shall_we_return) return true; - } - } -#endif - { - while ( begin <= end ) - { - T const multiplier_10 = multiplier * 10; - if (multiplier_10 / 10 != multiplier) multiplier_overflowed = true; - - T const dig_value = *end - czero; - T const new_sub_value = multiplier_10 * dig_value; - - if (*end < czero || *end >= czero + 10 - /* detecting overflow */ - || (dig_value && new_sub_value / dig_value != multiplier_10) - || static_cast<T>((std::numeric_limits<T>::max)()-new_sub_value) < value - || (multiplier_overflowed && dig_value) - ) - return false; - - value += new_sub_value; - multiplier *= 10; - --end; - } - } - return true; - } + return ::boost::lexical_cast<Target>( + ::boost::iterator_range<const signed char*>(chars, chars + count) + ); } - namespace detail - { - template <class CharT> - bool lc_iequal(const CharT* val, const CharT* lcase, const CharT* ucase, unsigned int len) { - 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) - { - 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; - - bool has_minus = false; - /* Parsing +/- */ - if( *begin == minus) - { - ++ begin; - has_minus = true; - } - else if( *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 - && - 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) - { - 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) - { - 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) - { - return put_inf_nan_impl(begin, end, value, L"nan", L"infinity"); - } - -#endif -#if !defined(BOOST_NO_CHAR16_T) && !defined(BOOST_NO_UNICODE_LITERALS) - template <class T> - bool parse_inf_nan(const char16_t* begin, const char16_t* end, T& value) - { - 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) - { - return put_inf_nan_impl(begin, end, value, u"nan", u"infinity"); - } -#endif -#if !defined(BOOST_NO_CHAR32_T) && !defined(BOOST_NO_UNICODE_LITERALS) - template <class T> - bool parse_inf_nan(const char32_t* begin, const char32_t* end, T& value) - { - 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) - { - 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) - { - 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) - { - return put_inf_nan_impl(begin, end, value, "nan", "infinity"); - } - } - - - namespace detail // lcast_ret_float + template <typename Target> + inline Target lexical_cast(const wchar_t* chars, std::size_t count) { - template <class T> - struct mantissa_holder_type - { - /* Can not be used with this type */ - }; - - template <> - struct mantissa_holder_type<float> - { - typedef unsigned int type; - }; - - template <> - struct mantissa_holder_type<double> - { -#if defined(BOOST_HAS_LONG_LONG) - typedef boost::ulong_long_type type; -#elif defined(BOOST_HAS_MS_INT64) - typedef unsigned __int64 type; -#endif - }; - - template<class Traits, class T, class CharT> - inline bool lcast_ret_float(T& value, const CharT* begin, const CharT* end) - { - -#ifndef BOOST_LEXICAL_CAST_ASSUME_C_LOCALE - std::locale loc; - typedef std::numpunct<CharT> numpunct; - numpunct const& np = BOOST_USE_FACET(numpunct, loc); - std::string const grouping( - (loc == std::locale::classic()) - ? std::string() - : np.grouping() - ); - std::string::size_type const grouping_size = grouping.size(); - CharT const thousands_sep = grouping_size ? np.thousands_sep() : 0; - CharT const decimal_point = np.decimal_point(); - bool found_grouping = false; - std::string::size_type last_grouping_pos = grouping_size - 1; -#else - CharT const decimal_point = lcast_char_constants<CharT>::c_decimal_separator; -#endif - - CharT const czero = lcast_char_constants<CharT>::zero; - 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; - - value = static_cast<T>(0); - - if (parse_inf_nan(begin, end, value)) return true; - - typedef typename Traits::int_type int_type; - typedef BOOST_DEDUCED_TYPENAME mantissa_holder_type<T>::type mantissa_type; - int_type const zero = Traits::to_int_type(czero); - if (begin == end) return false; - - /* Getting the plus/minus sign */ - bool has_minus = false; - if ( *begin == minus ) { - ++ begin; - has_minus = true; - if (begin == end) return false; - } else if ( *begin == plus ) { - ++begin; - if (begin == end) return false; - } - - bool found_decimal = false; - bool found_number_before_exp = false; - int pow_of_10 = 0; - mantissa_type mantissa=0; - bool is_mantissa_full = false; - - char length_since_last_delim = 0; - - while ( begin != end ) - { - if (found_decimal) { - /* We allow no thousand_separators after decimal point */ - - mantissa_type tmp_mantissa = mantissa * 10u; - if ( *begin == lowercase_e || *begin == capital_e ) break; - if ( *begin < czero || *begin >= czero + 10 ) return false; - if ( is_mantissa_full - || tmp_mantissa / 10u != mantissa - || (std::numeric_limits<mantissa_type>::max)()-(*begin - zero) < tmp_mantissa - ) { - is_mantissa_full = true; - ++ begin; - continue; - } - - -- pow_of_10; - mantissa = tmp_mantissa; - mantissa += *begin - zero; - - found_number_before_exp = true; - } else { - - if (*begin >= czero && *begin < czero + 10) { - - /* Checking for mantissa overflow. If overflow will - * occur, them we only increase multiplyer - */ - mantissa_type tmp_mantissa = mantissa * 10u; - if( !is_mantissa_full - && tmp_mantissa / 10u == mantissa - && (std::numeric_limits<mantissa_type>::max)()-(*begin - zero) >= tmp_mantissa - ) - { - mantissa = tmp_mantissa; - mantissa += *begin - zero; - } else - { - is_mantissa_full = true; - ++ pow_of_10; - } - - found_number_before_exp = true; - ++ length_since_last_delim; - } else if ( *begin == decimal_point || *begin == lowercase_e || *begin == capital_e) { -#ifndef BOOST_LEXICAL_CAST_ASSUME_C_LOCALE - /* If ( we need to check grouping - * and ( grouping missmatches - * or grouping position is incorrect - * or we are using the grouping position 0 twice - * ) - * ) then return error - */ - if( grouping_size && found_grouping - && ( - length_since_last_delim != grouping[0] - || last_grouping_pos>1 - || (last_grouping_pos==0 && grouping_size>1) - ) - ) return false; -#endif - - if(*begin == decimal_point) { - ++ begin; - found_decimal = true; - if (!found_number_before_exp && begin==end) return false; - continue; - }else { - if (!found_number_before_exp) return false; - break; - } - } -#ifndef BOOST_LEXICAL_CAST_ASSUME_C_LOCALE - else if (grouping_size && *begin == thousands_sep){ - if(found_grouping) - { - /* It is not he first time, when we find thousands separator, - * so we need to chek, is the distance between two groupings - * equal to grouping[last_grouping_pos] */ - - if (length_since_last_delim != grouping[last_grouping_pos] ) - { - if (!last_grouping_pos) return false; - else - { - -- last_grouping_pos; - if (length_since_last_delim != grouping[last_grouping_pos]) return false; - } - } else - /* We are calling the grouping[0] twice, when grouping size is more than 1 */ - if (grouping_size>1u && last_grouping_pos+1<grouping_size) return false; - - } else { - /* Delimiter at the begining ',000' */ - if (!length_since_last_delim) return false; - - found_grouping = true; - if (length_since_last_delim > grouping[last_grouping_pos] ) return false; - } - - length_since_last_delim = 0; - ++ begin; - - /* Delimiter at the end '100,' */ - if (begin == end) return false; - continue; - } -#endif - else return false; - } - - ++begin; - } - - // Exponent found - if ( begin != end && ( *begin == lowercase_e || *begin == capital_e ) ) { - ++ begin; - if ( begin == end ) return false; - - bool exp_has_minus = false; - if( *begin == minus ) { - exp_has_minus = true; - ++ begin; - if ( begin == end ) return false; - } else if (*begin == plus ) { - ++ begin; - if ( begin == end ) return false; - } - - int exp_pow_of_10 = 0; - while ( begin != end ) - { - if ( *begin < czero - || *begin >= czero + 10 - || exp_pow_of_10 * 10 < exp_pow_of_10) /* Overflows are checked lower more precisely*/ - return false; - - exp_pow_of_10 *= 10; - exp_pow_of_10 += *begin - zero; - ++ begin; - }; - - if ( exp_pow_of_10 ) { - /* Overflows are checked lower */ - if ( exp_has_minus ) { - pow_of_10 -= exp_pow_of_10; - } else { - pow_of_10 += exp_pow_of_10; - } - } - } - - /* We need a more accurate algorithm... We can not use current algorithm - * with long doubles (and with doubles if sizeof(double)==sizeof(long double)). - */ - long double result = std::pow(10.0L, pow_of_10) * mantissa; - value = static_cast<T>( has_minus ? (boost::math::changesign)(result) : result); - - if ( (boost::math::isinf)(value) || (boost::math::isnan)(value) ) return false; - - return true; - } + return ::boost::lexical_cast<Target>( + ::boost::iterator_range<const wchar_t*>(chars, chars + count) + ); } - - namespace detail // stl_buf_unlocker - { - template< class BufferType, class CharT > - class stl_buf_unlocker: public BufferType{ - public: - typedef BufferType base_class; -#ifndef BOOST_NO_USING_TEMPLATE - using base_class::pptr; - using base_class::pbase; - using base_class::setg; - using base_class::setp; -#else - CharT* pptr() const { return base_class::pptr(); } - CharT* pbase() const { return base_class::pbase(); } - void setg(CharT* gbeg, CharT* gnext, CharT* gend){ return base_class::setg(gbeg, gnext, gend); } - void setp(CharT* pbeg, CharT* pend) { return setp(pbeg, pend); } #endif - }; - } - - namespace detail - { - struct do_not_construct_out_stream_t{}; - } - - namespace detail // optimized stream wrapper +#ifndef BOOST_NO_CXX11_CHAR16_T + template <typename Target> + inline Target lexical_cast(const char16_t* chars, std::size_t count) { - // String representation of Source has an upper limit. - template< class CharT // a result of widest_char transformation - , class Traits // usually char_traits<CharT> - , bool RequiresStringbuffer - > - class lexical_stream_limited_src - { - -#if defined(BOOST_NO_STRINGSTREAM) - typedef std::ostrstream out_stream_t; - typedef stl_buf_unlocker<std::strstreambuf, char> unlocked_but_t; -#elif defined(BOOST_NO_STD_LOCALE) - typedef std::ostringstream out_stream_t; - typedef stl_buf_unlocker<std::stringbuf, char> unlocked_but_t; -#else - typedef std::basic_ostringstream<CharT, Traits> out_stream_t; - typedef stl_buf_unlocker<std::basic_stringbuf<CharT, Traits>, CharT> unlocked_but_t; -#endif - typedef BOOST_DEDUCED_TYPENAME ::boost::mpl::if_c< - RequiresStringbuffer, - out_stream_t, - do_not_construct_out_stream_t - >::type deduced_out_stream_t; - - // A string representation of Source is written to [start, finish). - CharT* start; - CharT* finish; - deduced_out_stream_t out_stream; - - public: - lexical_stream_limited_src(CharT* sta, CharT* fin) - : start(sta) - , finish(fin) - {} - - private: - // Undefined: - lexical_stream_limited_src(lexical_stream_limited_src const&); - void operator=(lexical_stream_limited_src const&); - -/************************************ HELPER FUNCTIONS FOR OPERATORS << ( ... ) ********************************/ - bool shl_char(CharT ch) - { - Traits::assign(*start, 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 conversions from wide character to char types." - "Use boost::locale instead" ); -#ifndef BOOST_LEXICAL_CAST_ASSUME_C_LOCALE - std::locale loc; - wchar_t w = BOOST_USE_FACET(std::ctype<wchar_t>, loc).widen(ch); -#else - wchar_t w = ch; -#endif - Traits::assign(*start, w); - finish = start + 1; - return true; - } -#endif - - bool shl_char_array(CharT const* str) - { - start = const_cast<CharT*>(str); - finish = start + Traits::length(str); - return true; - } - - template <class T> - bool shl_char_array(T const* str) - { - BOOST_STATIC_ASSERT_MSG(( sizeof(T) <= sizeof(CharT)), - "boost::lexical_cast does not support conversions from wide characters to char types." - "Use boost::locale instead" ); - return shl_input_streamable(str); - } - - bool shl_char_array_limited(CharT const* str, std::size_t max_size) - { - start = const_cast<CharT*>(str); - finish = std::find(start, start + max_size, static_cast<CharT>(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 - bool const result = !(out_stream << input).fail(); - const unlocked_but_t* const p - = static_cast<unlocked_but_t*>(out_stream.rdbuf()) ; - start = p->pbase(); - finish = p->pptr(); - return result; - } - - template <class T> - inline bool shl_signed(T 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 <class T, class SomeCharT> - bool shl_real_type(const T& val, SomeCharT* begin, SomeCharT*& end) - { - if (put_inf_nan(begin, end, val)) return true; - lcast_set_precision(out_stream, &val); - return shl_input_streamable(val); - } - - static bool shl_real_type(float val, char* begin, char*& end) - { using namespace std; - if (put_inf_nan(begin, end, val)) return true; - const double val_as_double = val; - end = begin + -#if (defined _MSC_VER) - sprintf_s(begin, end-begin, -#else - sprintf(begin, -#endif - "%.*g", static_cast<int>(boost::detail::lcast_get_precision<float>()), val_as_double); - return end > begin; - } - - static bool shl_real_type(double val, char* begin, char*& end) - { using namespace std; - if (put_inf_nan(begin, end, val)) return true; - end = begin + -#if (defined _MSC_VER) - sprintf_s(begin, end-begin, -#else - sprintf(begin, -#endif - "%.*g", static_cast<int>(boost::detail::lcast_get_precision<double>()), val); - return end > begin; - } - -#ifndef __MINGW32__ - static bool shl_real_type(long double val, char* begin, char*& end) - { using namespace std; - if (put_inf_nan(begin, end, val)) return true; - end = begin + -#if (defined _MSC_VER) - sprintf_s(begin, end-begin, -#else - sprintf(begin, -#endif - "%.*Lg", static_cast<int>(boost::detail::lcast_get_precision<long double>()), val ); - return end > begin; - } -#endif - - -#if !defined(BOOST_LCAST_NO_WCHAR_T) && !defined(BOOST_NO_SWPRINTF) && !defined(__MINGW32__) - static bool shl_real_type(float val, wchar_t* begin, wchar_t*& end) - { using namespace std; - if (put_inf_nan(begin, end, val)) return true; - const double val_as_double = val; - end = begin + swprintf(begin, end-begin, - L"%.*g", - static_cast<int>(boost::detail::lcast_get_precision<float >()), - val_as_double ); - return end > begin; - } - - static bool shl_real_type(double val, wchar_t* begin, wchar_t*& end) - { using namespace std; - if (put_inf_nan(begin, end, val)) return true; - end = begin + swprintf(begin, end-begin, - L"%.*g", static_cast<int>(boost::detail::lcast_get_precision<double >()), val ); - return end > begin; - } - - static bool shl_real_type(long double val, wchar_t* begin, wchar_t*& end) - { using namespace std; - if (put_inf_nan(begin, end, val)) return true; - end = begin + swprintf(begin, end-begin, - L"%.*Lg", static_cast<int>(boost::detail::lcast_get_precision<long double >()), val ); - return end > begin; - } -#endif - -/************************************ OPERATORS << ( ... ) ********************************/ - public: - 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; - } - - template<class Alloc> - bool operator<<(::boost::container::basic_string<CharT,Traits,Alloc> const& str) - { - start = const_cast<CharT*>(str.data()); - finish = start + str.length(); - return true; - } - - bool operator<<(bool value) - { - CharT const czero = lcast_char_constants<CharT>::zero; - Traits::assign(*start, Traits::to_char_type(czero + value)); - finish = start + 1; - return true; - } - - bool operator<<(const iterator_range<CharT*>& rng) - { - start = rng.begin(); - finish = rng.end(); - return true; - } - - bool operator<<(const iterator_range<const CharT*>& rng) - { - start = const_cast<CharT*>(rng.begin()); - finish = const_cast<CharT*>(rng.end()); - return true; - } - - bool operator<<(const iterator_range<const signed char*>& rng) - { - return (*this) << iterator_range<char*>( - const_cast<char*>(reinterpret_cast<const char*>(rng.begin())), - const_cast<char*>(reinterpret_cast<const char*>(rng.end())) - ); - } - - bool operator<<(const iterator_range<const unsigned char*>& rng) - { - return (*this) << iterator_range<char*>( - const_cast<char*>(reinterpret_cast<const char*>(rng.begin())), - const_cast<char*>(reinterpret_cast<const char*>(rng.end())) - ); - } - - bool operator<<(const iterator_range<signed char*>& rng) - { - return (*this) << iterator_range<char*>( - reinterpret_cast<char*>(rng.begin()), - reinterpret_cast<char*>(rng.end()) - ); - } - - bool operator<<(const iterator_range<unsigned char*>& rng) - { - return (*this) << iterator_range<char*>( - reinterpret_cast<char*>(rng.begin()), - reinterpret_cast<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_CHAR16_T) && !defined(BOOST_NO_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_CHAR32_T) && !defined(BOOST_NO_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) { return shl_char_array(str); } - bool operator<<(char* str) { return shl_char_array(str); } - 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) { start = lcast_put_unsigned<Traits>(n, finish); return true; } - bool operator<<(unsigned int n) { start = lcast_put_unsigned<Traits>(n, finish); return true; } - bool operator<<(unsigned long n) { start = lcast_put_unsigned<Traits>(n, finish); return true; } - -#if defined(BOOST_HAS_LONG_LONG) - bool operator<<(boost::ulong_long_type n) { start = lcast_put_unsigned<Traits>(n, finish); return true; } - bool operator<<(boost::long_long_type n) { return shl_signed(n); } -#elif defined(BOOST_HAS_MS_INT64) - bool operator<<(unsigned __int64 n) { start = lcast_put_unsigned<Traits>(n, finish); return true; } - bool operator<<( __int64 n) { return shl_signed(n); } -#endif - bool operator<<(float val) { return shl_real_type(val, start, finish); } - bool operator<<(double val) { return shl_real_type(val, start, finish); } - bool operator<<(long double val) { -#ifndef __MINGW32__ - return shl_real_type(val, start, finish); -#else - return shl_real_type(static_cast<double>(val), start, finish); -#endif - } - - template <std::size_t N> - bool operator<<(boost::array<CharT, N> const& input) - { return shl_char_array_limited(input.begin(), N); } - - template <std::size_t N> - bool operator<<(boost::array<unsigned char, N> const& input) - { return ((*this) << reinterpret_cast<boost::array<char, N> const& >(input)); } - - template <std::size_t N> - bool operator<<(boost::array<signed char, N> const& input) - { return ((*this) << reinterpret_cast<boost::array<char, N> const& >(input)); } - - template <std::size_t N> - bool operator<<(boost::array<const CharT, N> const& input) - { return shl_char_array_limited(input.begin(), N); } - - template <std::size_t N> - bool operator<<(boost::array<const unsigned char, N> const& input) - { 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) - { return ((*this) << reinterpret_cast<boost::array<const char, N> const& >(input)); } - -#if !defined(BOOST_NO_CXX11_HDR_ARRAY) && defined(BOOST_HAS_TR1_ARRAY) - template <std::size_t N> - bool operator<<(std::array<CharT, N> const& input) - { return shl_char_array_limited(input.begin(), N); } - - template <std::size_t N> - bool operator<<(std::array<unsigned char, N> const& input) - { return ((*this) << reinterpret_cast<boost::array<char, N> const& >(input)); } - - template <std::size_t N> - bool operator<<(std::array<signed char, N> const& input) - { return ((*this) << reinterpret_cast<boost::array<char, N> const& >(input)); } - - template <std::size_t N> - bool operator<<(std::array<const CharT, N> const& input) - { return shl_char_array_limited(input.begin(), N); } - - template <std::size_t N> - bool operator<<(std::array<const unsigned char, N> const& input) - { return ((*this) << reinterpret_cast<boost::array<const char, N> const& >(input)); } - - template <std::size_t N> - bool operator<<(std::array<const signed char, N> const& input) - { return ((*this) << reinterpret_cast<boost::array<const char, N> const& >(input)); } -#endif // !defined(BOOST_NO_CXX11_HDR_ARRAY) && defined(BOOST_HAS_TR1_ARRAY) - - template <class InStreamable> - bool operator<<(const InStreamable& input) { return shl_input_streamable(input); } - -/************************************ 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 has_minus = false; - - /* We won`t use `start' any more, so no need in decrementing it after */ - if ( Traits::eq(minus,*start) ) - { - ++start; - has_minus = true; - } else if ( Traits::eq( plus, *start ) ) - { - ++start; - } - - bool const succeed = lcast_ret_unsigned<Traits>(output, start, finish); -#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 - if (has_minus) output = static_cast<Type>(-output); -#if (defined _MSC_VER) -# pragma warning( pop ) -#elif defined( __BORLANDC__ ) -# pragma option pop -#endif - 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 has_minus = false; - - /* We won`t use `start' any more, so no need in decrementing it after */ - if ( Traits::eq(minus,*start) ) - { - ++start; - has_minus = true; - } else if ( Traits::eq(plus, *start) ) - { - ++start; - } - - bool succeed = lcast_ret_unsigned<Traits>(out_tmp, start, finish); - if (has_minus) { -#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 - utype const comp_val = static_cast<utype>(-(std::numeric_limits<Type>::min)()); - succeed = succeed && out_tmp<=comp_val; - output = -out_tmp; -#if (defined _MSC_VER) -# pragma warning( pop ) -#elif defined( __BORLANDC__ ) -# pragma option pop -#endif - } else { - utype const comp_val = static_cast<utype>((std::numeric_limits<Type>::max)()); - succeed = succeed && out_tmp<=comp_val; - output = out_tmp; - } - return succeed; - } - - template<typename InputStreamable> - bool shr_using_base_class(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; - -#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_LOCALE) - // If you have compilation error at this point, than your STL library - // unsupports such conversions. Try updating it. - BOOST_STATIC_ASSERT((boost::is_same<char, CharT>::value)); -#endif - -#if defined(BOOST_NO_STRINGSTREAM) - std::istrstream stream(start, finish - start); -#elif defined(BOOST_NO_STD_LOCALE) - std::istringstream stream; -#else - std::basic_istringstream<CharT, Traits> stream; -#endif - static_cast<unlocked_but_t*>(stream.rdbuf()) - ->setg(start, start, finish); - - stream.unsetf(std::ios::skipws); - lcast_set_precision(stream, static_cast<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 - } - - template<class T> - inline bool shr_xchar(T& output) - { - BOOST_STATIC_ASSERT_MSG(( sizeof(CharT) == sizeof(T) ), - "boost::lexical_cast does not support conversions from wchar_t to char 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; - } - -/************************************ 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 - 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_CHAR16_T) && !defined(BOOST_NO_UNICODE_LITERALS) - bool operator>>(char16_t& output) { return shr_xchar(output); } -#endif -#if !defined(BOOST_NO_CHAR32_T) && !defined(BOOST_NO_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; } - - - private: - template <std::size_t N, class ArrayT> - bool shr_std_array(ArrayT& output, boost::mpl::bool_<true> /*is_T_char_tag*/) - { - using namespace std; - const std::size_t size = finish - start; - if (size > N - 1) { // `-1` because we need to store \0 at the end - return false; - } - - memcpy(output.begin(), start, size * sizeof(CharT)); - *(output.begin() + size) = static_cast<CharT>(0); - return true; - } - - template <std::size_t N, class ArrayT> - bool shr_std_array(ArrayT& output, boost::mpl::bool_<false> /*is_T_char_tag*/) - { - return shr_using_base_class(output); // Array consist of non character types or unmatching character type - } - public: - - template <std::size_t N> - bool operator>>(boost::array<CharT, N>& output) - { - typedef boost::mpl::bool_<true> tag_type; - return shr_std_array<N>(output, tag_type()); - } - - template <std::size_t N> - bool operator>>(boost::array<unsigned char, N>& output) - { - return ((*this) >> reinterpret_cast<boost::array<char, N>& >(output)); - } - - template <std::size_t N> - bool operator>>(boost::array<signed char, N>& output) - { - return ((*this) >> reinterpret_cast<boost::array<char, N>& >(output)); - } - -#if !defined(BOOST_NO_CXX11_HDR_ARRAY) && defined(BOOST_HAS_TR1_ARRAY) - template <std::size_t N> - bool operator>>(std::array<CharT, N>& output) - { - typedef boost::mpl::bool_<true> tag_type; - return shr_std_array<N>(output, tag_type()); - } - - template <std::size_t N> - bool operator>>(std::array<unsigned char, N>& output) - { - return ((*this) >> reinterpret_cast<std::array<char, N>& >(output)); - } - - template <std::size_t N> - bool operator>>(std::array<signed char, N>& in) - { - return ((*this) >> reinterpret_cast<std::array<char, N>& >(output)); - } -#endif // !defined(BOOST_NO_CXX11_HDR_ARRAY) && defined(BOOST_HAS_TR1_ARRAY) - - - /* - * case "-0" || "0" || "+0" : output = false; return true; - * case "1" || "+1": output = true; return true; - * default: return false; - */ - bool operator>>(bool& output) - { - CharT const zero = lcast_char_constants<CharT>::zero; - CharT const plus = lcast_char_constants<CharT>::plus; - CharT const minus = lcast_char_constants<CharT>::minus; - - switch(finish-start) - { - case 1: - output = Traits::eq(start[0], zero+1); - return output || Traits::eq(start[0], zero ); - case 2: - if ( Traits::eq( plus, *start) ) - { - ++start; - output = Traits::eq(start[0], zero +1); - return output || Traits::eq(start[0], zero ); - } else - { - output = false; - return Traits::eq( minus, *start) - && Traits::eq( zero, start[1]); - } - default: - output = false; // Suppress warning about uninitalized variable - return false; - } - } - - bool operator>>(float& output) { return lcast_ret_float<Traits>(output,start,finish); } - - private: - // Not optimised converter - template <class T> - bool float_types_converter_internal(T& output, int /*tag*/) { - if (parse_inf_nan(start, finish, output)) return true; - bool 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 && - ( - *(finish-1) == lowercase_e // 1.0e - || *(finish-1) == capital_e // 1.0E - || *(finish-1) == minus // 1.0e- or 1.0E- - || *(finish-1) == plus // 1.0e+ or 1.0E+ - ) - ) return false; - - return return_value; - } - - // Optimised converter - bool float_types_converter_internal(double& output,char /*tag*/) { - return lcast_ret_float<Traits>(output,start,finish); - } - public: - - bool operator>>(double& output) - { - /* - * Some compilers implement long double as double. In that case these types have - * same size, same precision, same max and min values... And it means, - * that current implementation of lcast_ret_float cannot be used for type - * double, because it will give a big precision loss. - * */ - boost::mpl::if_c< -#if defined(BOOST_HAS_LONG_LONG) || defined(BOOST_HAS_MS_INT64) - ::boost::type_traits::ice_eq< sizeof(double), sizeof(long double) >::value, -#else - 0 -#endif - int, - char - >::type tag = 0; - - return float_types_converter_internal(output, tag); - } - - bool operator>>(long double& output) - { - int tag = 0; - return float_types_converter_internal(output, tag); - } - - // 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); } - }; + return ::boost::lexical_cast<Target>( + ::boost::iterator_range<const char16_t*>(chars, chars + count) + ); } - - 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 T> - struct is_stdstring - { - BOOST_STATIC_CONSTANT(bool, value = false ); - }; - - template<typename CharT, typename Traits, typename Alloc> - struct is_stdstring< std::basic_string<CharT, Traits, Alloc> > - { - BOOST_STATIC_CONSTANT(bool, value = true ); - }; - - template<typename CharT, typename Traits, typename Alloc> - struct is_stdstring< ::boost::container::basic_string<CharT, Traits, Alloc> > - { - BOOST_STATIC_CONSTANT(bool, value = true ); - }; - - template<typename Target, typename Source> - struct is_arithmetic_and_not_xchars - { - BOOST_STATIC_CONSTANT(bool, value = - ( - ::boost::type_traits::ice_and< - ::boost::is_arithmetic<Source>::value, - ::boost::is_arithmetic<Target>::value, - ::boost::type_traits::ice_not< - detail::is_char_or_wchar<Target>::value - >::value, - ::boost::type_traits::ice_not< - detail::is_char_or_wchar<Source>::value - >::value - >::value - ) - ); - }; - - /* - * is_xchar_to_xchar<Target, Source>::value is true, when - * Target and Souce are the same char types, or when - * Target and Souce are char types of the same size. - */ - template<typename Target, typename Source> - struct is_xchar_to_xchar - { - BOOST_STATIC_CONSTANT(bool, value = - ( - ::boost::type_traits::ice_or< - ::boost::type_traits::ice_and< - is_same<Source,Target>::value, - is_char_or_wchar<Target>::value - >::value, - ::boost::type_traits::ice_and< - ::boost::type_traits::ice_eq< sizeof(char),sizeof(Target)>::value, - ::boost::type_traits::ice_eq< sizeof(char),sizeof(Source)>::value, - is_char_or_wchar<Target>::value, - is_char_or_wchar<Source>::value - >::value - >::value - ) - ); - }; - - - // this metafunction evaluates to true, if we have optimized comnversion - // from Float type to Char array. - // Must be in sync with lexical_stream_limited_src<Char, ...>::shl_real_type(...) - template <typename Float, typename Char> - struct is_this_float_conversion_optimized - { - typedef ::boost::type_traits::ice_and< - ::boost::is_float<Float>::value, -#if !defined(BOOST_LCAST_NO_WCHAR_T) && !defined(BOOST_NO_SWPRINTF) && !defined(__MINGW32__) - ::boost::type_traits::ice_or< - ::boost::type_traits::ice_eq<sizeof(Char), sizeof(char) >::value, - ::boost::is_same<Char, wchar_t>::value - >::value -#else - ::boost::type_traits::ice_eq<sizeof(Char), sizeof(char) >::value -#endif - > result_type; - - BOOST_STATIC_CONSTANT(bool, value = (result_type::value) ); - }; - - template<typename Target, typename Source> - struct is_char_array_to_stdstring - { - BOOST_STATIC_CONSTANT(bool, value = false ); - }; - - template<typename CharT, typename Traits, typename Alloc> - struct is_char_array_to_stdstring< std::basic_string<CharT, Traits, Alloc>, CharT* > - { - BOOST_STATIC_CONSTANT(bool, value = true ); - }; - - template<typename CharT, typename Traits, typename Alloc> - struct is_char_array_to_stdstring< std::basic_string<CharT, Traits, Alloc>, const CharT* > - { - BOOST_STATIC_CONSTANT(bool, value = true ); - }; - - template<typename CharT, typename Traits, typename Alloc> - struct is_char_array_to_stdstring< ::boost::container::basic_string<CharT, Traits, Alloc>, CharT* > - { - BOOST_STATIC_CONSTANT(bool, value = true ); - }; - - template<typename CharT, typename Traits, typename Alloc> - struct is_char_array_to_stdstring< ::boost::container::basic_string<CharT, Traits, Alloc>, const CharT* > - { - BOOST_STATIC_CONSTANT(bool, value = true ); - }; - -#if (defined _MSC_VER) -# pragma warning( push ) -# pragma warning( disable : 4701 ) // possible use of ... before initialization -# pragma warning( disable : 4702 ) // unreachable code -# pragma warning( disable : 4267 ) // conversion from 'size_t' to 'unsigned int' -#endif - template<typename Target, typename Source> - struct lexical_cast_do_cast - { - static inline Target lexical_cast_impl(const Source& arg) - { - typedef BOOST_DEDUCED_TYPENAME detail::array_to_pointer_decay<Source>::type src; - typedef BOOST_DEDUCED_TYPENAME ::boost::remove_cv<src>::type no_cv_src; - typedef BOOST_DEDUCED_TYPENAME detail::stream_char<Target>::type target_char_t; - typedef BOOST_DEDUCED_TYPENAME detail::stream_char<no_cv_src>::type src_char_type; - typedef BOOST_DEDUCED_TYPENAME detail::widest_char< - target_char_t, src_char_type - >::type char_type; - -#if !defined(BOOST_NO_CHAR16_T) && defined(BOOST_NO_UNICODE_LITERALS) - BOOST_STATIC_ASSERT_MSG(( !::boost::is_same<char16_t, src_char_type>::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_CHAR32_T) && defined(BOOST_NO_UNICODE_LITERALS) - BOOST_STATIC_ASSERT_MSG(( !::boost::is_same<char32_t, src_char_type>::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::detail::deduce_char_traits< - char_type, Target, no_cv_src - >::type traits; - - typedef ::boost::type_traits::ice_and< - ::boost::detail::is_char_or_wchar<src_char_type>::value, // source is lexical type - ::boost::detail::is_char_or_wchar<target_char_t>::value, // target is a lexical type - ::boost::is_same<char, src_char_type>::value, // source is not a wide character based type - ::boost::type_traits::ice_ne<sizeof(char), sizeof(target_char_t) >::value // target type is based on wide character - > is_string_widening_required_t; - - typedef ::boost::type_traits::ice_or< - ::boost::is_integral<no_cv_src>::value, - ::boost::detail::is_this_float_conversion_optimized<no_cv_src, char_type >::value, - ::boost::detail::is_char_or_wchar<src_char_type >::value - > is_source_input_optimized_t; - - // Target type must be default constructible - Target result; - - // If we have an optimized conversion for - // Source, we do not need to construct stringbuf. - const bool requires_stringbuf = ::boost::type_traits::ice_or< - is_string_widening_required_t::value, - ::boost::type_traits::ice_not< is_source_input_optimized_t::value >::value - >::value; - - typedef detail::lexical_stream_limited_src<char_type, traits, requires_stringbuf > interpreter_type; - - typedef detail::lcast_src_length<no_cv_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(); - - interpreter_type interpreter(buf, buf + src_len); - - // Disabling ADL, by directly specifying operators. - if(!(interpreter.operator <<(arg) && interpreter.operator >>(result))) - BOOST_LCAST_THROW_BAD_CAST(Source, Target); - - return result; - } - }; -#if (defined _MSC_VER) -# pragma warning( pop ) #endif - - template <typename Source> - struct lexical_cast_copy - { - static inline Source lexical_cast_impl(const Source &arg) - { - return arg; - } - }; - - template <class Source, class Target > - struct detect_precision_loss - { - typedef boost::numeric::Trunc<Source> Rounder; - typedef Source source_type ; - - typedef BOOST_DEDUCED_TYPENAME mpl::if_< - ::boost::is_arithmetic<Source>, Source, Source const& - >::type argument_type ; - - static source_type nearbyint ( argument_type s ) - { - const source_type orig_div_round = s / Rounder::nearbyint(s); - const source_type eps = std::numeric_limits<source_type>::epsilon(); - - if ((orig_div_round > 1 ? orig_div_round - 1 : 1 - orig_div_round) > eps) - BOOST_LCAST_THROW_BAD_CAST(Source, Target); - - return s ; - } - - typedef typename Rounder::round_style round_style; - } ; - - template <class Source, class Target > - struct nothrow_overflow_handler - { - void operator() ( boost::numeric::range_check_result r ) - { - if (r != boost::numeric::cInRange) - BOOST_LCAST_THROW_BAD_CAST(Source, Target); - } - } ; - - template <typename Target, typename Source> - struct lexical_cast_dynamic_num_not_ignoring_minus - { - static inline Target lexical_cast_impl(const Source &arg) - { - return boost::numeric::converter< - Target, - Source, - boost::numeric::conversion_traits<Target,Source>, - nothrow_overflow_handler<Source, Target>, - detect_precision_loss<Source, Target> - >::convert(arg); - } - }; - - template <typename Target, typename Source> - struct lexical_cast_dynamic_num_ignoring_minus - { - static inline Target lexical_cast_impl(const Source &arg) - { - typedef boost::numeric::converter< - Target, - Source, - boost::numeric::conversion_traits<Target,Source>, - nothrow_overflow_handler<Source, Target>, - detect_precision_loss<Source, Target> - > converter_t; - - return ( - arg < 0 ? -converter_t::convert(-arg) : converter_t::convert(arg) - ); - } - }; - - /* - * 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 lexical_cast_dynamic_num - { - static inline Target lexical_cast_impl(const Source &arg) - { - typedef BOOST_DEDUCED_TYPENAME ::boost::mpl::if_c< - ::boost::type_traits::ice_and< - ::boost::type_traits::ice_or< - ::boost::is_signed<Source>::value, - ::boost::is_float<Source>::value - >::value, - ::boost::type_traits::ice_not< - ::boost::is_same<Source, bool>::value - >::value, - ::boost::type_traits::ice_not< - ::boost::is_same<Target, bool>::value - >::value, - ::boost::is_unsigned<Target>::value - >::value, - lexical_cast_dynamic_num_ignoring_minus<Target, Source>, - lexical_cast_dynamic_num_not_ignoring_minus<Target, Source> - >::type caster_type; - - return caster_type::lexical_cast_impl(arg); - } - }; - } - - template <typename Target, typename Source> - inline Target lexical_cast(const Source &arg) +#ifndef BOOST_NO_CXX11_CHAR32_T + template <typename Target> + inline Target lexical_cast(const char32_t* chars, std::size_t count) { - typedef BOOST_DEDUCED_TYPENAME ::boost::detail::array_to_pointer_decay<Source>::type src; - - typedef BOOST_DEDUCED_TYPENAME ::boost::type_traits::ice_or< - ::boost::detail::is_xchar_to_xchar<Target, src >::value, - ::boost::detail::is_char_array_to_stdstring<Target, src >::value, - ::boost::type_traits::ice_and< - ::boost::is_same<Target, src >::value, - ::boost::detail::is_stdstring<Target >::value - >::value - > shall_we_copy_t; - - typedef BOOST_DEDUCED_TYPENAME - ::boost::detail::is_arithmetic_and_not_xchars<Target, src > shall_we_copy_with_dynamic_check_t; - - typedef BOOST_DEDUCED_TYPENAME ::boost::mpl::if_c< - shall_we_copy_t::value, - ::boost::detail::lexical_cast_copy<src >, - BOOST_DEDUCED_TYPENAME ::boost::mpl::if_c< - shall_we_copy_with_dynamic_check_t::value, - ::boost::detail::lexical_cast_dynamic_num<Target, src >, - ::boost::detail::lexical_cast_do_cast<Target, src > - >::type - >::type caster_type; - - return caster_type::lexical_cast_impl(arg); + return ::boost::lexical_cast<Target>( + ::boost::iterator_range<const char32_t*>(chars, chars + count) + ); } - -} // namespace boost - -#else // #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION - -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() == -#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 - } - - 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_LCAST_THROW_BAD_CAST(Source, Target); - return result; - } - } // namespace boost -#endif - -// Copyright Kevlin Henney, 2000-2005. -// Copyright Alexander Nasonov, 2006-2010. -// Copyright Antony Polukhin, 2011-2012. -// -// 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_THROW_BAD_CAST #undef BOOST_LCAST_NO_WCHAR_T #endif // BOOST_LEXICAL_CAST_INCLUDED |