// Boost lexical_cast.hpp header -------------------------------------------//
//
-// See http://www.boost.org for most recent version including documentation.
+// 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 SlettebΓΈ,
+// enhanced with contributions from Terje Slettebo,
// with additional fixes and suggestions from Gennaro Prota,
// Beman Dawes, Dave Abrahams, Daryle Walker, Peter Dimov,
-// and other Boosters
-// when: November 2000, March 2003
+// 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>
#include <sstream>
#endif
-#if defined(BOOST_NO_STRINGSTREAM) || \
- defined(BOOST_NO_STD_WSTRING) || \
- defined(BOOST_NO_STD_LOCALE) || \
- defined(BOOST_NO_CWCHAR) || \
- defined(BOOST_MSVC) && (BOOST_MSVC <= 1200)
-#define DISABLE_WIDE_CHAR_SUPPORT
+#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
+#define BOOST_LCAST_NO_WCHAR_T
#endif
-#ifdef BOOST_NO_INTRINSIC_WCHAR_T
-#include <cwchar>
+#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
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:
- virtual ~bad_lexical_cast() throw()
+ bad_lexical_cast() :
+#ifndef BOOST_NO_TYPEID
+ source(&typeid(void)), target(&typeid(void))
+#else
+ source(0), target(0) // this breaks getters
+#endif
{
}
- };
- namespace detail // actual underlying concrete exception type
- {
- template<typename Target, typename Source>
- class no_lexical_conversion : public bad_lexical_cast
+ 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)
{
- public:
- no_lexical_conversion()
- : description(
- std::string() + "bad lexical cast: " +
- "source type value could not be interpreted as target, Target=" +
- typeid(Target).name() + ", Source=" + typeid(Source).name())
- {
- }
- virtual ~no_lexical_conversion() throw()
- {
- }
- virtual const char *what() const throw()
- {
- return description.c_str();
- }
- private:
- const std::string description; // static initialization fails on MSVC6
- };
- }
+ }
+
+ 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
{
typedef char type;
};
- #ifndef DISABLE_WIDE_CHAR_SUPPORT
+#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;
};
+#ifdef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
template<>
struct stream_char<std::wstring>
{
typedef wchar_t type;
};
- #endif
+#endif
+#endif
template<typename TargetChar, typename SourceChar>
struct widest_char
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>
+ 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()
+ lexical_stream(char_type* = 0, char_type* = 0)
{
stream.unsetf(std::ios::skipws);
-
- if(std::numeric_limits<Target>::is_specialized)
- stream.precision(std::numeric_limits<Target>::digits10 + 1);
- else if(std::numeric_limits<Source>::is_specialized)
- stream.precision(std::numeric_limits<Source>::digits10 + 1);
+ lcast_set_precision(stream, static_cast<Source*>(0), static_cast<Target*>(0) );
}
~lexical_stream()
{
}
bool operator<<(const Source &input)
{
- return stream << input;
+ return !(stream << input).fail();
}
template<typename InputStreamable>
bool operator>>(InputStreamable &output)
{
return !is_pointer<InputStreamable>::value &&
stream >> output &&
- (stream >> std::ws).eof();
+ 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
- output = stream.str();
+ stream.str().swap(output);
return true;
}
- #ifndef DISABLE_WIDE_CHAR_SUPPORT
+ #ifndef BOOST_LCAST_NO_WCHAR_T
bool operator>>(std::wstring &output)
{
- output = stream.str();
+ stream.str().swap(output);
return true;
}
#endif
- private:
- typedef typename widest_char<
- typename stream_char<Target>::type,
- typename stream_char<Source>::type>::type char_type;
+#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> stream;
+ 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, static_cast<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, 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
+ }
+
+ 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;
+ };
+
+#if (defined _MSC_VER)
+# pragma warning( push )
+# pragma warning( disable : 4701 ) // possible use of ... before initialization
+# pragma warning( disable : 4702 ) // unreachable code
+#endif
+
+ 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);
+
+ Target result;
+ if(!(interpreter << arg && interpreter >> result))
+ BOOST_LCAST_THROW_BAD_CAST(Source, Target);
+ return result;
+ }
+#if (defined _MSC_VER)
+# pragma warning( pop )
+#endif
+ }
+
+ 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)
{
- detail::lexical_stream<Target, Source> interpreter;
+ 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))
- throw detail::no_lexical_conversion<Target, Source>();
+#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, 2000-2003. All rights reserved.
-//
-// Permission to use, copy, modify, and distribute this software for any
-// purpose is hereby granted without fee, provided that this copyright and
-// permissions notice appear in all copies and derivatives.
+// Copyright Kevlin Henney, 2000-2005.
+// Copyright Alexander Nasonov, 2006-2007.
//
-// This software is provided "as is" without express or implied warranty.
+// 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 DISABLE_WIDE_CHAR_SUPPORT
+#undef BOOST_LCAST_NO_WCHAR_T
#endif
projects / lyx.git / blobdiff