| // -*- C++ -*- | 
 | //===--------------------------- istream ----------------------------------===// | 
 | // | 
 | //                     The LLVM Compiler Infrastructure | 
 | // | 
 | // This file is dual licensed under the MIT and the University of Illinois Open | 
 | // Source Licenses. See LICENSE.TXT for details. | 
 | // | 
 | //===----------------------------------------------------------------------===// | 
 |  | 
 | #ifndef _LIBCPP_ISTREAM | 
 | #define _LIBCPP_ISTREAM | 
 |  | 
 | /* | 
 |     istream synopsis | 
 |  | 
 | template <class charT, class traits = char_traits<charT> > | 
 | class basic_istream | 
 |     : virtual public basic_ios<charT,traits> | 
 | { | 
 | public: | 
 |     // types (inherited from basic_ios (27.5.4)): | 
 |     typedef charT                          char_type; | 
 |     typedef traits                         traits_type; | 
 |     typedef typename traits_type::int_type int_type; | 
 |     typedef typename traits_type::pos_type pos_type; | 
 |     typedef typename traits_type::off_type off_type; | 
 |  | 
 |     // 27.7.1.1.1 Constructor/destructor: | 
 |     explicit basic_istream(basic_streambuf<char_type, traits_type>* sb); | 
 |     basic_istream(basic_istream&& rhs); | 
 |     virtual ~basic_istream(); | 
 |  | 
 |     // 27.7.1.1.2 Assign/swap: | 
 |     basic_istream& operator=(basic_istream&& rhs); | 
 |     void swap(basic_istream& rhs); | 
 |  | 
 |     // 27.7.1.1.3 Prefix/suffix: | 
 |     class sentry; | 
 |  | 
 |     // 27.7.1.2 Formatted input: | 
 |     basic_istream& operator>>(basic_istream& (*pf)(basic_istream&)); | 
 |     basic_istream& operator>>(basic_ios<char_type, traits_type>& | 
 |                               (*pf)(basic_ios<char_type, traits_type>&)); | 
 |     basic_istream& operator>>(ios_base& (*pf)(ios_base&)); | 
 |     basic_istream& operator>>(basic_streambuf<char_type, traits_type>* sb); | 
 |     basic_istream& operator>>(bool& n); | 
 |     basic_istream& operator>>(short& n); | 
 |     basic_istream& operator>>(unsigned short& n); | 
 |     basic_istream& operator>>(int& n); | 
 |     basic_istream& operator>>(unsigned int& n); | 
 |     basic_istream& operator>>(long& n); | 
 |     basic_istream& operator>>(unsigned long& n); | 
 |     basic_istream& operator>>(long long& n); | 
 |     basic_istream& operator>>(unsigned long long& n); | 
 |     basic_istream& operator>>(float& f); | 
 |     basic_istream& operator>>(double& f); | 
 |     basic_istream& operator>>(long double& f); | 
 |     basic_istream& operator>>(void*& p); | 
 |  | 
 |     // 27.7.1.3 Unformatted input: | 
 |     streamsize gcount() const; | 
 |     int_type get(); | 
 |     basic_istream& get(char_type& c); | 
 |     basic_istream& get(char_type* s, streamsize n); | 
 |     basic_istream& get(char_type* s, streamsize n, char_type delim); | 
 |     basic_istream& get(basic_streambuf<char_type,traits_type>& sb); | 
 |     basic_istream& get(basic_streambuf<char_type,traits_type>& sb, char_type delim); | 
 |  | 
 |     basic_istream& getline(char_type* s, streamsize n); | 
 |     basic_istream& getline(char_type* s, streamsize n, char_type delim); | 
 |  | 
 |     basic_istream& ignore(streamsize n = 1, int_type delim = traits_type::eof()); | 
 |     int_type peek(); | 
 |     basic_istream& read (char_type* s, streamsize n); | 
 |     streamsize readsome(char_type* s, streamsize n); | 
 |  | 
 |     basic_istream& putback(char_type c); | 
 |     basic_istream& unget(); | 
 |     int sync(); | 
 |  | 
 |     pos_type tellg(); | 
 |     basic_istream& seekg(pos_type); | 
 |     basic_istream& seekg(off_type, ios_base::seekdir); | 
 | protected: | 
 |     basic_istream(const basic_istream& rhs) = delete; | 
 |     basic_istream(basic_istream&& rhs); | 
 |     // 27.7.2.1.2 Assign/swap: | 
 |     basic_istream& operator=(const basic_istream& rhs) = delete; | 
 |     basic_istream& operator=(basic_istream&& rhs); | 
 |     void swap(basic_istream& rhs); | 
 | }; | 
 |  | 
 | // 27.7.1.2.3 character extraction templates: | 
 | template<class charT, class traits> | 
 |   basic_istream<charT,traits>& operator>>(basic_istream<charT,traits>&, charT&); | 
 |  | 
 | template<class traits> | 
 |   basic_istream<char,traits>& operator>>(basic_istream<char,traits>&, unsigned char&); | 
 |  | 
 | template<class traits> | 
 |   basic_istream<char,traits>& operator>>(basic_istream<char,traits>&, signed char&); | 
 |  | 
 | template<class charT, class traits> | 
 |   basic_istream<charT,traits>& operator>>(basic_istream<charT,traits>&, charT*); | 
 |  | 
 | template<class traits> | 
 |   basic_istream<char,traits>& operator>>(basic_istream<char,traits>&, unsigned char*); | 
 |  | 
 | template<class traits> | 
 |   basic_istream<char,traits>& operator>>(basic_istream<char,traits>&, signed char*); | 
 |  | 
 | template <class charT, class traits> | 
 |   void | 
 |   swap(basic_istream<charT, traits>& x, basic_istream<charT, traits>& y); | 
 |  | 
 | typedef basic_istream<char> istream; | 
 | typedef basic_istream<wchar_t> wistream; | 
 |  | 
 | template <class charT, class traits = char_traits<charT> > | 
 | class basic_iostream : | 
 |     public basic_istream<charT,traits>, | 
 |     public basic_ostream<charT,traits> | 
 | { | 
 | public: | 
 |     // types: | 
 |     typedef charT                          char_type; | 
 |     typedef traits                         traits_type; | 
 |     typedef typename traits_type::int_type int_type; | 
 |     typedef typename traits_type::pos_type pos_type; | 
 |     typedef typename traits_type::off_type off_type; | 
 |  | 
 |     // constructor/destructor | 
 |     explicit basic_iostream(basic_streambuf<char_type, traits_type>* sb); | 
 |     basic_iostream(basic_iostream&& rhs); | 
 |     virtual ~basic_iostream(); | 
 |  | 
 |     // assign/swap | 
 |     basic_iostream& operator=(basic_iostream&& rhs); | 
 |     void swap(basic_iostream& rhs); | 
 | }; | 
 |  | 
 | template <class charT, class traits> | 
 |   void | 
 |   swap(basic_iostream<charT, traits>& x, basic_iostream<charT, traits>& y); | 
 |  | 
 | typedef basic_iostream<char> iostream; | 
 | typedef basic_iostream<wchar_t> wiostream; | 
 |  | 
 | template <class charT, class traits> | 
 |   basic_istream<charT,traits>& | 
 |   ws(basic_istream<charT,traits>& is); | 
 |  | 
 | template <class charT, class traits, class T> | 
 |   basic_istream<charT, traits>& | 
 |   operator>>(basic_istream<charT, traits>&& is, T& x); | 
 |  | 
 | }  // std | 
 |  | 
 | */ | 
 |  | 
 | #include <__config> | 
 | #include <ostream> | 
 |  | 
 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) | 
 | #pragma GCC system_header | 
 | #endif | 
 |  | 
 | _LIBCPP_PUSH_MACROS | 
 | #include <__undef_macros> | 
 |  | 
 |  | 
 | _LIBCPP_BEGIN_NAMESPACE_STD | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | class _LIBCPP_TEMPLATE_VIS basic_istream | 
 |     : virtual public basic_ios<_CharT, _Traits> | 
 | { | 
 |     streamsize __gc_; | 
 | public: | 
 |     // types (inherited from basic_ios (27.5.4)): | 
 |     typedef _CharT                         char_type; | 
 |     typedef _Traits                        traits_type; | 
 |     typedef typename traits_type::int_type int_type; | 
 |     typedef typename traits_type::pos_type pos_type; | 
 |     typedef typename traits_type::off_type off_type; | 
 |  | 
 |     // 27.7.1.1.1 Constructor/destructor: | 
 |     inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY | 
 |     explicit basic_istream(basic_streambuf<char_type, traits_type>* __sb) : __gc_(0) | 
 |     { this->init(__sb); } | 
 |     virtual ~basic_istream(); | 
 | protected: | 
 | #ifndef _LIBCPP_CXX03_LANG | 
 |     inline _LIBCPP_INLINE_VISIBILITY | 
 |     basic_istream(basic_istream&& __rhs); | 
 |  | 
 |     // 27.7.1.1.2 Assign/swap: | 
 |     inline _LIBCPP_INLINE_VISIBILITY | 
 |     basic_istream& operator=(basic_istream&& __rhs); | 
 | #endif | 
 |  | 
 |     inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY | 
 |     void swap(basic_istream& __rhs) { | 
 |       _VSTD::swap(__gc_, __rhs.__gc_); | 
 |       basic_ios<char_type, traits_type>::swap(__rhs); | 
 |     } | 
 |  | 
 | #ifndef _LIBCPP_CXX03_LANG | 
 |     basic_istream           (const basic_istream& __rhs) = delete; | 
 |     basic_istream& operator=(const basic_istream& __rhs) = delete; | 
 | #endif | 
 | public: | 
 |  | 
 |     // 27.7.1.1.3 Prefix/suffix: | 
 |     class _LIBCPP_TEMPLATE_VIS sentry; | 
 |  | 
 |     // 27.7.1.2 Formatted input: | 
 |     inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY | 
 |     basic_istream& operator>>(basic_istream& (*__pf)(basic_istream&)) | 
 |     { return __pf(*this); } | 
 |  | 
 |     inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY | 
 |     basic_istream& operator>>(basic_ios<char_type, traits_type>& | 
 |                               (*__pf)(basic_ios<char_type, traits_type>&)) | 
 |     { __pf(*this); return *this; } | 
 |  | 
 |     inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY | 
 |     basic_istream& operator>>(ios_base& (*__pf)(ios_base&)) | 
 |     { __pf(*this); return *this; } | 
 |  | 
 |     basic_istream& operator>>(basic_streambuf<char_type, traits_type>* __sb); | 
 |     basic_istream& operator>>(bool& __n); | 
 |     basic_istream& operator>>(short& __n); | 
 |     basic_istream& operator>>(unsigned short& __n); | 
 |     basic_istream& operator>>(int& __n); | 
 |     basic_istream& operator>>(unsigned int& __n); | 
 |     basic_istream& operator>>(long& __n); | 
 |     basic_istream& operator>>(unsigned long& __n); | 
 |     basic_istream& operator>>(long long& __n); | 
 |     basic_istream& operator>>(unsigned long long& __n); | 
 |     basic_istream& operator>>(float& __f); | 
 |     basic_istream& operator>>(double& __f); | 
 |     basic_istream& operator>>(long double& __f); | 
 |     basic_istream& operator>>(void*& __p); | 
 |  | 
 |     // 27.7.1.3 Unformatted input: | 
 |     _LIBCPP_INLINE_VISIBILITY | 
 |     streamsize gcount() const {return __gc_;} | 
 |     int_type get(); | 
 |  | 
 |     inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY | 
 |     basic_istream& get(char_type& __c) { | 
 |       int_type __ch = get(); | 
 |       if (__ch != traits_type::eof()) | 
 |         __c = traits_type::to_char_type(__ch); | 
 |       return *this; | 
 |     } | 
 |  | 
 |     inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY | 
 |     basic_istream& get(char_type* __s, streamsize __n) | 
 |     { return get(__s, __n, this->widen('\n')); } | 
 |  | 
 |     basic_istream& get(char_type* __s, streamsize __n, char_type __dlm); | 
 |  | 
 |     inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY | 
 |     basic_istream& get(basic_streambuf<char_type, traits_type>& __sb) | 
 |     { return get(__sb, this->widen('\n')); } | 
 |  | 
 |     basic_istream& get(basic_streambuf<char_type, traits_type>& __sb, char_type __dlm); | 
 |  | 
 |     inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY | 
 |     basic_istream& getline(char_type* __s, streamsize __n) | 
 |     { return getline(__s, __n, this->widen('\n')); } | 
 |  | 
 |     basic_istream& getline(char_type* __s, streamsize __n, char_type __dlm); | 
 |  | 
 |     basic_istream& ignore(streamsize __n = 1, int_type __dlm = traits_type::eof()); | 
 |     int_type peek(); | 
 |     basic_istream& read (char_type* __s, streamsize __n); | 
 |     streamsize readsome(char_type* __s, streamsize __n); | 
 |  | 
 |     basic_istream& putback(char_type __c); | 
 |     basic_istream& unget(); | 
 |     int sync(); | 
 |  | 
 |     pos_type tellg(); | 
 |     basic_istream& seekg(pos_type __pos); | 
 |     basic_istream& seekg(off_type __off, ios_base::seekdir __dir); | 
 | }; | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | class _LIBCPP_TEMPLATE_VIS basic_istream<_CharT, _Traits>::sentry | 
 | { | 
 |     bool __ok_; | 
 |  | 
 |     sentry(const sentry&); // = delete; | 
 |     sentry& operator=(const sentry&); // = delete; | 
 |  | 
 | public: | 
 |     explicit sentry(basic_istream<_CharT, _Traits>& __is, bool __noskipws = false); | 
 | //    ~sentry() = default; | 
 |  | 
 |     _LIBCPP_INLINE_VISIBILITY | 
 |         _LIBCPP_EXPLICIT | 
 |         operator bool() const {return __ok_;} | 
 | }; | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>::sentry::sentry(basic_istream<_CharT, _Traits>& __is, | 
 |                                                bool __noskipws) | 
 |     : __ok_(false) | 
 | { | 
 |     if (__is.good()) | 
 |     { | 
 |         if (__is.tie()) | 
 |             __is.tie()->flush(); | 
 |         if (!__noskipws && (__is.flags() & ios_base::skipws)) | 
 |         { | 
 |             typedef istreambuf_iterator<_CharT, _Traits> _Ip; | 
 |             const ctype<_CharT>& __ct = use_facet<ctype<_CharT> >(__is.getloc()); | 
 |             _Ip __i(__is); | 
 |             _Ip __eof; | 
 |             for (; __i != __eof; ++__i) | 
 |                 if (!__ct.is(__ct.space, *__i)) | 
 |                     break; | 
 |             if (__i == __eof) | 
 |                 __is.setstate(ios_base::failbit | ios_base::eofbit); | 
 |         } | 
 |         __ok_ = __is.good(); | 
 |     } | 
 |     else | 
 |         __is.setstate(ios_base::failbit); | 
 | } | 
 |  | 
 | #ifndef _LIBCPP_CXX03_LANG | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>::basic_istream(basic_istream&& __rhs) | 
 |     : __gc_(__rhs.__gc_) | 
 | { | 
 |     __rhs.__gc_ = 0; | 
 |     this->move(__rhs); | 
 | } | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::operator=(basic_istream&& __rhs) | 
 | { | 
 |     swap(__rhs); | 
 |     return *this; | 
 | } | 
 |  | 
 | #endif  // _LIBCPP_CXX03_LANG | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>::~basic_istream() | 
 | { | 
 | } | 
 |  | 
 | template <class _Tp, class _CharT, class _Traits> | 
 | _LIBCPP_INLINE_VISIBILITY | 
 | basic_istream<_CharT, _Traits>& | 
 | __input_arithmetic(basic_istream<_CharT, _Traits>& __is, _Tp& __n) { | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         typename basic_istream<_CharT, _Traits>::sentry __s(__is); | 
 |         if (__s) | 
 |         { | 
 |             typedef istreambuf_iterator<_CharT, _Traits> _Ip; | 
 |             typedef num_get<_CharT, _Ip> _Fp; | 
 |             ios_base::iostate __err = ios_base::goodbit; | 
 |             use_facet<_Fp>(__is.getloc()).get(_Ip(__is), _Ip(), __is, __err, __n); | 
 |             __is.setstate(__err); | 
 |         } | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         __is.__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return __is; | 
 | } | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::operator>>(unsigned short& __n) | 
 | { | 
 |     return _VSTD::__input_arithmetic<unsigned short>(*this, __n); | 
 | } | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::operator>>(unsigned int& __n) | 
 | { | 
 |     return _VSTD::__input_arithmetic<unsigned int>(*this, __n); | 
 | } | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::operator>>(long& __n) | 
 | { | 
 |     return _VSTD::__input_arithmetic<long>(*this, __n); | 
 | } | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::operator>>(unsigned long& __n) | 
 | { | 
 |     return _VSTD::__input_arithmetic<unsigned long>(*this, __n); | 
 | } | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::operator>>(long long& __n) | 
 | { | 
 |     return _VSTD::__input_arithmetic<long long>(*this, __n); | 
 | } | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::operator>>(unsigned long long& __n) | 
 | { | 
 |     return _VSTD::__input_arithmetic<unsigned long long>(*this, __n); | 
 | } | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::operator>>(float& __n) | 
 | { | 
 |     return _VSTD::__input_arithmetic<float>(*this, __n); | 
 | } | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::operator>>(double& __n) | 
 | { | 
 |     return _VSTD::__input_arithmetic<double>(*this, __n); | 
 | } | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::operator>>(long double& __n) | 
 | { | 
 |     return _VSTD::__input_arithmetic<long double>(*this, __n); | 
 | } | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::operator>>(bool& __n) | 
 | { | 
 |     return _VSTD::__input_arithmetic<bool>(*this, __n); | 
 | } | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::operator>>(void*& __n) | 
 | { | 
 |     return _VSTD::__input_arithmetic<void*>(*this, __n); | 
 | } | 
 |  | 
 | template <class _Tp, class _CharT, class _Traits> | 
 | _LIBCPP_INLINE_VISIBILITY | 
 | basic_istream<_CharT, _Traits>& | 
 | __input_arithmetic_with_numeric_limits(basic_istream<_CharT, _Traits>& __is, _Tp& __n) { | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         typename basic_istream<_CharT, _Traits>::sentry __s(__is); | 
 |         if (__s) | 
 |         { | 
 |             typedef istreambuf_iterator<_CharT, _Traits> _Ip; | 
 |             typedef num_get<_CharT, _Ip> _Fp; | 
 |             ios_base::iostate __err = ios_base::goodbit; | 
 |             long __temp; | 
 |             use_facet<_Fp>(__is.getloc()).get(_Ip(__is), _Ip(), __is, __err, __temp); | 
 |             if (__temp < numeric_limits<_Tp>::min()) | 
 |             { | 
 |                 __err |= ios_base::failbit; | 
 |                 __n = numeric_limits<_Tp>::min(); | 
 |             } | 
 |             else if (__temp > numeric_limits<_Tp>::max()) | 
 |             { | 
 |                 __err |= ios_base::failbit; | 
 |                 __n = numeric_limits<_Tp>::max(); | 
 |             } | 
 |             else | 
 |                 __n = static_cast<_Tp>(__temp); | 
 |             __is.setstate(__err); | 
 |         } | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         __is.__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return __is; | 
 | } | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::operator>>(short& __n) | 
 | { | 
 |     return _VSTD::__input_arithmetic_with_numeric_limits<short>(*this, __n); | 
 | } | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::operator>>(int& __n) | 
 | { | 
 |     return _VSTD::__input_arithmetic_with_numeric_limits<int>(*this, __n); | 
 | } | 
 |  | 
 | template<class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | operator>>(basic_istream<_CharT, _Traits>& __is, _CharT* __s) | 
 | { | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         typename basic_istream<_CharT, _Traits>::sentry __sen(__is); | 
 |         if (__sen) | 
 |         { | 
 |             streamsize __n = __is.width(); | 
 |             if (__n <= 0) | 
 |                 __n = numeric_limits<streamsize>::max() / sizeof(_CharT) - 1; | 
 |             streamsize __c = 0; | 
 |             const ctype<_CharT>& __ct = use_facet<ctype<_CharT> >(__is.getloc()); | 
 |             ios_base::iostate __err = ios_base::goodbit; | 
 |             while (__c < __n-1) | 
 |             { | 
 |                 typename _Traits::int_type __i = __is.rdbuf()->sgetc(); | 
 |                 if (_Traits::eq_int_type(__i, _Traits::eof())) | 
 |                 { | 
 |                    __err |= ios_base::eofbit; | 
 |                    break; | 
 |                 } | 
 |                 _CharT __ch = _Traits::to_char_type(__i); | 
 |                 if (__ct.is(__ct.space, __ch)) | 
 |                     break; | 
 |                 *__s++ = __ch; | 
 |                 ++__c; | 
 |                  __is.rdbuf()->sbumpc(); | 
 |             } | 
 |             *__s = _CharT(); | 
 |             __is.width(0); | 
 |             if (__c == 0) | 
 |                __err |= ios_base::failbit; | 
 |             __is.setstate(__err); | 
 |         } | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         __is.__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return __is; | 
 | } | 
 |  | 
 | template<class _Traits> | 
 | inline _LIBCPP_INLINE_VISIBILITY | 
 | basic_istream<char, _Traits>& | 
 | operator>>(basic_istream<char, _Traits>& __is, unsigned char* __s) | 
 | { | 
 |     return __is >> (char*)__s; | 
 | } | 
 |  | 
 | template<class _Traits> | 
 | inline _LIBCPP_INLINE_VISIBILITY | 
 | basic_istream<char, _Traits>& | 
 | operator>>(basic_istream<char, _Traits>& __is, signed char* __s) | 
 | { | 
 |     return __is >> (char*)__s; | 
 | } | 
 |  | 
 | template<class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | operator>>(basic_istream<_CharT, _Traits>& __is, _CharT& __c) | 
 | { | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         typename basic_istream<_CharT, _Traits>::sentry __sen(__is); | 
 |         if (__sen) | 
 |         { | 
 |             typename _Traits::int_type __i = __is.rdbuf()->sbumpc(); | 
 |             if (_Traits::eq_int_type(__i, _Traits::eof())) | 
 |                 __is.setstate(ios_base::eofbit | ios_base::failbit); | 
 |             else | 
 |                 __c = _Traits::to_char_type(__i); | 
 |         } | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         __is.__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return __is; | 
 | } | 
 |  | 
 | template<class _Traits> | 
 | inline _LIBCPP_INLINE_VISIBILITY | 
 | basic_istream<char, _Traits>& | 
 | operator>>(basic_istream<char, _Traits>& __is, unsigned char& __c) | 
 | { | 
 |     return __is >> (char&)__c; | 
 | } | 
 |  | 
 | template<class _Traits> | 
 | inline _LIBCPP_INLINE_VISIBILITY | 
 | basic_istream<char, _Traits>& | 
 | operator>>(basic_istream<char, _Traits>& __is, signed char& __c) | 
 | { | 
 |     return __is >> (char&)__c; | 
 | } | 
 |  | 
 | template<class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::operator>>(basic_streambuf<char_type, traits_type>* __sb) | 
 | { | 
 |     __gc_ = 0; | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         sentry __s(*this, true); | 
 |         if (__s) | 
 |         { | 
 |             if (__sb) | 
 |             { | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |                 try | 
 |                 { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |                     ios_base::iostate __err = ios_base::goodbit; | 
 |                     while (true) | 
 |                     { | 
 |                         typename traits_type::int_type __i = this->rdbuf()->sgetc(); | 
 |                         if (traits_type::eq_int_type(__i, _Traits::eof())) | 
 |                         { | 
 |                            __err |= ios_base::eofbit; | 
 |                            break; | 
 |                         } | 
 |                         if (traits_type::eq_int_type( | 
 |                                 __sb->sputc(traits_type::to_char_type(__i)), | 
 |                                 traits_type::eof())) | 
 |                             break; | 
 |                         ++__gc_; | 
 |                         this->rdbuf()->sbumpc(); | 
 |                     } | 
 |                     if (__gc_ == 0) | 
 |                        __err |= ios_base::failbit; | 
 |                     this->setstate(__err); | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |                 } | 
 |                 catch (...) | 
 |                 { | 
 |                     if (__gc_ == 0) | 
 |                         this->__set_failbit_and_consider_rethrow(); | 
 |                 } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |             } | 
 |             else | 
 |                 this->setstate(ios_base::failbit); | 
 |         } | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         this->__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return *this; | 
 | } | 
 |  | 
 | template<class _CharT, class _Traits> | 
 | typename basic_istream<_CharT, _Traits>::int_type | 
 | basic_istream<_CharT, _Traits>::get() | 
 | { | 
 |     __gc_ = 0; | 
 |     int_type __r = traits_type::eof(); | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         sentry __s(*this, true); | 
 |         if (__s) | 
 |         { | 
 |             __r = this->rdbuf()->sbumpc(); | 
 |             if (traits_type::eq_int_type(__r, traits_type::eof())) | 
 |                this->setstate(ios_base::failbit | ios_base::eofbit); | 
 |             else | 
 |                 __gc_ = 1; | 
 |         } | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         this->__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return __r; | 
 | } | 
 |  | 
 | template<class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::get(char_type* __s, streamsize __n, char_type __dlm) | 
 | { | 
 |     __gc_ = 0; | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         sentry __sen(*this, true); | 
 |         if (__sen) | 
 |         { | 
 |             if (__n > 0) | 
 |             { | 
 |                 ios_base::iostate __err = ios_base::goodbit; | 
 |                 while (__gc_ < __n-1) | 
 |                 { | 
 |                     int_type __i = this->rdbuf()->sgetc(); | 
 |                     if (traits_type::eq_int_type(__i, traits_type::eof())) | 
 |                     { | 
 |                        __err |= ios_base::eofbit; | 
 |                        break; | 
 |                     } | 
 |                     char_type __ch = traits_type::to_char_type(__i); | 
 |                     if (traits_type::eq(__ch, __dlm)) | 
 |                         break; | 
 |                     *__s++ = __ch; | 
 |                     ++__gc_; | 
 |                      this->rdbuf()->sbumpc(); | 
 |                 } | 
 |                 if (__gc_ == 0) | 
 |                    __err |= ios_base::failbit; | 
 |                 this->setstate(__err); | 
 |             } | 
 |             else | 
 |                 this->setstate(ios_base::failbit); | 
 |         } | 
 |         if (__n > 0) | 
 |             *__s = char_type(); | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         if (__n > 0) | 
 |             *__s = char_type(); | 
 |         this->__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return *this; | 
 | } | 
 |  | 
 | template<class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::get(basic_streambuf<char_type, traits_type>& __sb, | 
 |                                     char_type __dlm) | 
 | { | 
 |     __gc_ = 0; | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         sentry __sen(*this, true); | 
 |         if (__sen) | 
 |         { | 
 |             ios_base::iostate __err = ios_base::goodbit; | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |             try | 
 |             { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |                 while (true) | 
 |                 { | 
 |                     typename traits_type::int_type __i = this->rdbuf()->sgetc(); | 
 |                     if (traits_type::eq_int_type(__i, traits_type::eof())) | 
 |                     { | 
 |                        __err |= ios_base::eofbit; | 
 |                        break; | 
 |                     } | 
 |                     char_type __ch = traits_type::to_char_type(__i); | 
 |                     if (traits_type::eq(__ch, __dlm)) | 
 |                         break; | 
 |                     if (traits_type::eq_int_type(__sb.sputc(__ch), traits_type::eof())) | 
 |                         break; | 
 |                     ++__gc_; | 
 |                     this->rdbuf()->sbumpc(); | 
 |                 } | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |             } | 
 |             catch (...) | 
 |             { | 
 |             } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |             if (__gc_ == 0) | 
 |                __err |= ios_base::failbit; | 
 |             this->setstate(__err); | 
 |         } | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         this->__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return *this; | 
 | } | 
 |  | 
 | template<class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::getline(char_type* __s, streamsize __n, char_type __dlm) | 
 | { | 
 |     __gc_ = 0; | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         sentry __sen(*this, true); | 
 |         if (__sen) | 
 |         { | 
 |             ios_base::iostate __err = ios_base::goodbit; | 
 |             while (true) | 
 |             { | 
 |                 typename traits_type::int_type __i = this->rdbuf()->sgetc(); | 
 |                 if (traits_type::eq_int_type(__i, traits_type::eof())) | 
 |                 { | 
 |                    __err |= ios_base::eofbit; | 
 |                    break; | 
 |                 } | 
 |                 char_type __ch = traits_type::to_char_type(__i); | 
 |                 if (traits_type::eq(__ch, __dlm)) | 
 |                 { | 
 |                     this->rdbuf()->sbumpc(); | 
 |                     ++__gc_; | 
 |                     break; | 
 |                 } | 
 |                 if (__gc_ >= __n-1) | 
 |                 { | 
 |                     __err |= ios_base::failbit; | 
 |                     break; | 
 |                 } | 
 |                 *__s++ = __ch; | 
 |                 this->rdbuf()->sbumpc(); | 
 |                 ++__gc_; | 
 |             } | 
 |             if (__gc_ == 0) | 
 |                __err |= ios_base::failbit; | 
 |             this->setstate(__err); | 
 |         } | 
 |         if (__n > 0) | 
 |             *__s = char_type(); | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         if (__n > 0) | 
 |             *__s = char_type(); | 
 |         this->__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return *this; | 
 | } | 
 |  | 
 | template<class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::ignore(streamsize __n, int_type __dlm) | 
 | { | 
 |     __gc_ = 0; | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         sentry __sen(*this, true); | 
 |         if (__sen) | 
 |         { | 
 |             ios_base::iostate __err = ios_base::goodbit; | 
 |             if (__n == numeric_limits<streamsize>::max()) | 
 |             { | 
 |                 while (true) | 
 |                 { | 
 |                     typename traits_type::int_type __i = this->rdbuf()->sbumpc(); | 
 |                     if (traits_type::eq_int_type(__i, traits_type::eof())) | 
 |                     { | 
 |                        __err |= ios_base::eofbit; | 
 |                        break; | 
 |                     } | 
 |                     ++__gc_; | 
 |                     if (traits_type::eq_int_type(__i, __dlm)) | 
 |                         break; | 
 |                 } | 
 |             } | 
 |             else | 
 |             { | 
 |                 while (__gc_ < __n) | 
 |                 { | 
 |                     typename traits_type::int_type __i = this->rdbuf()->sbumpc(); | 
 |                     if (traits_type::eq_int_type(__i, traits_type::eof())) | 
 |                     { | 
 |                        __err |= ios_base::eofbit; | 
 |                        break; | 
 |                     } | 
 |                     ++__gc_; | 
 |                     if (traits_type::eq_int_type(__i, __dlm)) | 
 |                         break; | 
 |                 } | 
 |             } | 
 |             this->setstate(__err); | 
 |         } | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         this->__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return *this; | 
 | } | 
 |  | 
 | template<class _CharT, class _Traits> | 
 | typename basic_istream<_CharT, _Traits>::int_type | 
 | basic_istream<_CharT, _Traits>::peek() | 
 | { | 
 |     __gc_ = 0; | 
 |     int_type __r = traits_type::eof(); | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         sentry __sen(*this, true); | 
 |         if (__sen) | 
 |         { | 
 |             __r = this->rdbuf()->sgetc(); | 
 |             if (traits_type::eq_int_type(__r, traits_type::eof())) | 
 |                 this->setstate(ios_base::eofbit); | 
 |         } | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         this->__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return __r; | 
 | } | 
 |  | 
 | template<class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::read(char_type* __s, streamsize __n) | 
 | { | 
 |     __gc_ = 0; | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         sentry __sen(*this, true); | 
 |         if (__sen) | 
 |         { | 
 |             __gc_ = this->rdbuf()->sgetn(__s, __n); | 
 |             if (__gc_ != __n) | 
 |                 this->setstate(ios_base::failbit | ios_base::eofbit); | 
 |         } | 
 |         else | 
 |             this->setstate(ios_base::failbit); | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         this->__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return *this; | 
 | } | 
 |  | 
 | template<class _CharT, class _Traits> | 
 | streamsize | 
 | basic_istream<_CharT, _Traits>::readsome(char_type* __s, streamsize __n) | 
 | { | 
 |     __gc_ = 0; | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         sentry __sen(*this, true); | 
 |         if (__sen) | 
 |         { | 
 |             streamsize __c = this->rdbuf()->in_avail(); | 
 |             switch (__c) | 
 |             { | 
 |             case -1: | 
 |                 this->setstate(ios_base::eofbit); | 
 |                 break; | 
 |             case 0: | 
 |                 break; | 
 |             default: | 
 |                 read(__s, _VSTD::min(__c, __n)); | 
 |                 break; | 
 |             } | 
 |         } | 
 |         else | 
 |             this->setstate(ios_base::failbit); | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         this->__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return __gc_; | 
 | } | 
 |  | 
 | template<class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::putback(char_type __c) | 
 | { | 
 |     __gc_ = 0; | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         this->clear(this->rdstate() & ~ios_base::eofbit); | 
 |         sentry __sen(*this, true); | 
 |         if (__sen) | 
 |         { | 
 |             if (this->rdbuf() == 0 || this->rdbuf()->sputbackc(__c) == traits_type::eof()) | 
 |                 this->setstate(ios_base::badbit); | 
 |         } | 
 |         else | 
 |             this->setstate(ios_base::failbit); | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         this->__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return *this; | 
 | } | 
 |  | 
 | template<class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::unget() | 
 | { | 
 |     __gc_ = 0; | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         this->clear(this->rdstate() & ~ios_base::eofbit); | 
 |         sentry __sen(*this, true); | 
 |         if (__sen) | 
 |         { | 
 |             if (this->rdbuf() == 0 || this->rdbuf()->sungetc() == traits_type::eof()) | 
 |                 this->setstate(ios_base::badbit); | 
 |         } | 
 |         else | 
 |             this->setstate(ios_base::failbit); | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         this->__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return *this; | 
 | } | 
 |  | 
 | template<class _CharT, class _Traits> | 
 | int | 
 | basic_istream<_CharT, _Traits>::sync() | 
 | { | 
 |     int __r = 0; | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         sentry __sen(*this, true); | 
 |         if (__sen) | 
 |         { | 
 |             if (this->rdbuf() == 0) | 
 |                 return -1; | 
 |             if (this->rdbuf()->pubsync() == -1) | 
 |             { | 
 |                 this->setstate(ios_base::badbit); | 
 |                 return -1; | 
 |             } | 
 |         } | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         this->__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return __r; | 
 | } | 
 |  | 
 | template<class _CharT, class _Traits> | 
 | typename basic_istream<_CharT, _Traits>::pos_type | 
 | basic_istream<_CharT, _Traits>::tellg() | 
 | { | 
 |     pos_type __r(-1); | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         sentry __sen(*this, true); | 
 |         if (__sen) | 
 |             __r = this->rdbuf()->pubseekoff(0, ios_base::cur, ios_base::in); | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         this->__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return __r; | 
 | } | 
 |  | 
 | template<class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::seekg(pos_type __pos) | 
 | { | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         this->clear(this->rdstate() & ~ios_base::eofbit); | 
 |         sentry __sen(*this, true); | 
 |         if (__sen) | 
 |         { | 
 |             if (this->rdbuf()->pubseekpos(__pos, ios_base::in) == pos_type(-1)) | 
 |                 this->setstate(ios_base::failbit); | 
 |         } | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         this->__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return *this; | 
 | } | 
 |  | 
 | template<class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | basic_istream<_CharT, _Traits>::seekg(off_type __off, ios_base::seekdir __dir) | 
 | { | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         this->clear(this->rdstate() & ~ios_base::eofbit); | 
 |         sentry __sen(*this, true); | 
 |         if (__sen) | 
 |         { | 
 |             if (this->rdbuf()->pubseekoff(__off, __dir, ios_base::in) == pos_type(-1)) | 
 |                 this->setstate(ios_base::failbit); | 
 |         } | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         this->__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return *this; | 
 | } | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | basic_istream<_CharT, _Traits>& | 
 | ws(basic_istream<_CharT, _Traits>& __is) | 
 | { | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         typename basic_istream<_CharT, _Traits>::sentry __sen(__is, true); | 
 |         if (__sen) | 
 |         { | 
 |             const ctype<_CharT>& __ct = use_facet<ctype<_CharT> >(__is.getloc()); | 
 |             while (true) | 
 |             { | 
 |                 typename _Traits::int_type __i = __is.rdbuf()->sgetc(); | 
 |                 if (_Traits::eq_int_type(__i, _Traits::eof())) | 
 |                 { | 
 |                    __is.setstate(ios_base::eofbit); | 
 |                    break; | 
 |                 } | 
 |                 if (!__ct.is(__ct.space, _Traits::to_char_type(__i))) | 
 |                     break; | 
 |                 __is.rdbuf()->sbumpc(); | 
 |             } | 
 |         } | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         __is.__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return __is; | 
 | } | 
 |  | 
 | #ifndef _LIBCPP_CXX03_LANG | 
 |  | 
 | template <class _CharT, class _Traits, class _Tp> | 
 | inline _LIBCPP_INLINE_VISIBILITY | 
 | basic_istream<_CharT, _Traits>& | 
 | operator>>(basic_istream<_CharT, _Traits>&& __is, _Tp&& __x) | 
 | { | 
 |     __is >> _VSTD::forward<_Tp>(__x); | 
 |     return __is; | 
 | } | 
 |  | 
 | #endif  // _LIBCPP_CXX03_LANG | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | class _LIBCPP_TEMPLATE_VIS basic_iostream | 
 |     : public basic_istream<_CharT, _Traits>, | 
 |       public basic_ostream<_CharT, _Traits> | 
 | { | 
 | public: | 
 |     // types: | 
 |     typedef _CharT                         char_type; | 
 |     typedef _Traits                        traits_type; | 
 |     typedef typename traits_type::int_type int_type; | 
 |     typedef typename traits_type::pos_type pos_type; | 
 |     typedef typename traits_type::off_type off_type; | 
 |  | 
 |     // constructor/destructor | 
 |     inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY | 
 |     explicit basic_iostream(basic_streambuf<char_type, traits_type>* __sb) | 
 |       : basic_istream<_CharT, _Traits>(__sb) | 
 |     {} | 
 |  | 
 |     virtual ~basic_iostream(); | 
 | protected: | 
 | #ifndef _LIBCPP_CXX03_LANG | 
 |     inline _LIBCPP_INLINE_VISIBILITY | 
 |     basic_iostream(basic_iostream&& __rhs); | 
 |  | 
 |     // assign/swap | 
 |     inline _LIBCPP_INLINE_VISIBILITY | 
 |     basic_iostream& operator=(basic_iostream&& __rhs); | 
 | #endif | 
 |     inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY | 
 |     void swap(basic_iostream& __rhs) | 
 |     { basic_istream<char_type, traits_type>::swap(__rhs); } | 
 | public: | 
 | }; | 
 |  | 
 | #ifndef _LIBCPP_CXX03_LANG | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | basic_iostream<_CharT, _Traits>::basic_iostream(basic_iostream&& __rhs) | 
 |     : basic_istream<_CharT, _Traits>(_VSTD::move(__rhs)) | 
 | { | 
 | } | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | basic_iostream<_CharT, _Traits>& | 
 | basic_iostream<_CharT, _Traits>::operator=(basic_iostream&& __rhs) | 
 | { | 
 |     swap(__rhs); | 
 |     return *this; | 
 | } | 
 |  | 
 | #endif  // _LIBCPP_CXX03_LANG | 
 |  | 
 | template <class _CharT, class _Traits> | 
 | basic_iostream<_CharT, _Traits>::~basic_iostream() | 
 | { | 
 | } | 
 |  | 
 | template<class _CharT, class _Traits, class _Allocator> | 
 | basic_istream<_CharT, _Traits>& | 
 | operator>>(basic_istream<_CharT, _Traits>& __is, | 
 |            basic_string<_CharT, _Traits, _Allocator>& __str) | 
 | { | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         typename basic_istream<_CharT, _Traits>::sentry __sen(__is); | 
 |         if (__sen) | 
 |         { | 
 |             __str.clear(); | 
 |             streamsize __n = __is.width(); | 
 |             if (__n <= 0) | 
 |                 __n = __str.max_size(); | 
 |             if (__n <= 0) | 
 |                 __n = numeric_limits<streamsize>::max(); | 
 |             streamsize __c = 0; | 
 |             const ctype<_CharT>& __ct = use_facet<ctype<_CharT> >(__is.getloc()); | 
 |             ios_base::iostate __err = ios_base::goodbit; | 
 |             while (__c < __n) | 
 |             { | 
 |                 typename _Traits::int_type __i = __is.rdbuf()->sgetc(); | 
 |                 if (_Traits::eq_int_type(__i, _Traits::eof())) | 
 |                 { | 
 |                    __err |= ios_base::eofbit; | 
 |                    break; | 
 |                 } | 
 |                 _CharT __ch = _Traits::to_char_type(__i); | 
 |                 if (__ct.is(__ct.space, __ch)) | 
 |                     break; | 
 |                 __str.push_back(__ch); | 
 |                 ++__c; | 
 |                  __is.rdbuf()->sbumpc(); | 
 |             } | 
 |             __is.width(0); | 
 |             if (__c == 0) | 
 |                __err |= ios_base::failbit; | 
 |             __is.setstate(__err); | 
 |         } | 
 |         else | 
 |             __is.setstate(ios_base::failbit); | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         __is.__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return __is; | 
 | } | 
 |  | 
 | template<class _CharT, class _Traits, class _Allocator> | 
 | basic_istream<_CharT, _Traits>& | 
 | getline(basic_istream<_CharT, _Traits>& __is, | 
 |         basic_string<_CharT, _Traits, _Allocator>& __str, _CharT __dlm) | 
 | { | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         typename basic_istream<_CharT, _Traits>::sentry __sen(__is, true); | 
 |         if (__sen) | 
 |         { | 
 |             __str.clear(); | 
 |             ios_base::iostate __err = ios_base::goodbit; | 
 |             streamsize __extr = 0; | 
 |             while (true) | 
 |             { | 
 |                 typename _Traits::int_type __i = __is.rdbuf()->sbumpc(); | 
 |                 if (_Traits::eq_int_type(__i, _Traits::eof())) | 
 |                 { | 
 |                    __err |= ios_base::eofbit; | 
 |                    break; | 
 |                 } | 
 |                 ++__extr; | 
 |                 _CharT __ch = _Traits::to_char_type(__i); | 
 |                 if (_Traits::eq(__ch, __dlm)) | 
 |                     break; | 
 |                 __str.push_back(__ch); | 
 |                 if (__str.size() == __str.max_size()) | 
 |                 { | 
 |                     __err |= ios_base::failbit; | 
 |                     break; | 
 |                 } | 
 |             } | 
 |             if (__extr == 0) | 
 |                __err |= ios_base::failbit; | 
 |             __is.setstate(__err); | 
 |         } | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         __is.__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return __is; | 
 | } | 
 |  | 
 | template<class _CharT, class _Traits, class _Allocator> | 
 | inline _LIBCPP_INLINE_VISIBILITY | 
 | basic_istream<_CharT, _Traits>& | 
 | getline(basic_istream<_CharT, _Traits>& __is, | 
 |         basic_string<_CharT, _Traits, _Allocator>& __str) | 
 | { | 
 |     return getline(__is, __str, __is.widen('\n')); | 
 | } | 
 |  | 
 | #ifndef _LIBCPP_CXX03_LANG | 
 |  | 
 | template<class _CharT, class _Traits, class _Allocator> | 
 | inline _LIBCPP_INLINE_VISIBILITY | 
 | basic_istream<_CharT, _Traits>& | 
 | getline(basic_istream<_CharT, _Traits>&& __is, | 
 |         basic_string<_CharT, _Traits, _Allocator>& __str, _CharT __dlm) | 
 | { | 
 |     return getline(__is, __str, __dlm); | 
 | } | 
 |  | 
 | template<class _CharT, class _Traits, class _Allocator> | 
 | inline _LIBCPP_INLINE_VISIBILITY | 
 | basic_istream<_CharT, _Traits>& | 
 | getline(basic_istream<_CharT, _Traits>&& __is, | 
 |         basic_string<_CharT, _Traits, _Allocator>& __str) | 
 | { | 
 |     return getline(__is, __str, __is.widen('\n')); | 
 | } | 
 |  | 
 | #endif  // _LIBCPP_CXX03_LANG | 
 |  | 
 | template <class _CharT, class _Traits, size_t _Size> | 
 | basic_istream<_CharT, _Traits>& | 
 | operator>>(basic_istream<_CharT, _Traits>& __is, bitset<_Size>& __x) | 
 | { | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     try | 
 |     { | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |         typename basic_istream<_CharT, _Traits>::sentry __sen(__is); | 
 |         if (__sen) | 
 |         { | 
 |             basic_string<_CharT, _Traits> __str; | 
 |             const ctype<_CharT>& __ct = use_facet<ctype<_CharT> >(__is.getloc()); | 
 |             size_t __c = 0; | 
 |             ios_base::iostate __err = ios_base::goodbit; | 
 |             _CharT __zero = __ct.widen('0'); | 
 |             _CharT __one = __ct.widen('1'); | 
 |             while (__c < _Size) | 
 |             { | 
 |                 typename _Traits::int_type __i = __is.rdbuf()->sgetc(); | 
 |                 if (_Traits::eq_int_type(__i, _Traits::eof())) | 
 |                 { | 
 |                    __err |= ios_base::eofbit; | 
 |                    break; | 
 |                 } | 
 |                 _CharT __ch = _Traits::to_char_type(__i); | 
 |                 if (!_Traits::eq(__ch, __zero) && !_Traits::eq(__ch, __one)) | 
 |                     break; | 
 |                 __str.push_back(__ch); | 
 |                 ++__c; | 
 |                  __is.rdbuf()->sbumpc(); | 
 |             } | 
 |             __x = bitset<_Size>(__str); | 
 |             if (__c == 0) | 
 |                __err |= ios_base::failbit; | 
 |             __is.setstate(__err); | 
 |         } | 
 |         else | 
 |             __is.setstate(ios_base::failbit); | 
 | #ifndef _LIBCPP_NO_EXCEPTIONS | 
 |     } | 
 |     catch (...) | 
 |     { | 
 |         __is.__set_badbit_and_consider_rethrow(); | 
 |     } | 
 | #endif  // _LIBCPP_NO_EXCEPTIONS | 
 |     return __is; | 
 | } | 
 |  | 
 | #ifndef _LIBCPP_AVAILABILITY_NO_STREAMS_EXTERN_TEMPLATE | 
 | _LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_istream<char>) | 
 | _LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_istream<wchar_t>) | 
 | _LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_iostream<char>) | 
 | #endif | 
 |  | 
 | _LIBCPP_END_NAMESPACE_STD | 
 |  | 
 | _LIBCPP_POP_MACROS | 
 |  | 
 | #endif  // _LIBCPP_ISTREAM |