// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCPP_LOCALE
#define _LIBCPP_LOCALE

/*
    locale synopsis

namespace std
{

class locale
{
public:
    // types:
    class facet;
    class id;

    typedef int category;
    static const category // values assigned here are for exposition only
        none     = 0x000,
        collate  = 0x010,
        ctype    = 0x020,
        monetary = 0x040,
        numeric  = 0x080,
        time     = 0x100,
        messages = 0x200,
        all = collate | ctype | monetary | numeric | time | messages;

    // construct/copy/destroy:
    locale() noexcept;
    locale(const locale& other) noexcept;
    explicit locale(const char* std_name);
    explicit locale(const string& std_name);
    locale(const locale& other, const char* std_name, category);
    locale(const locale& other, const string& std_name, category);
    template <class Facet> locale(const locale& other, Facet* f);
    locale(const locale& other, const locale& one, category);

    ~locale(); // not virtual

    const locale& operator=(const locale& other) noexcept;

    template <class Facet> locale combine(const locale& other) const;

    // locale operations:
    basic_string<char> name() const;
    bool operator==(const locale& other) const;
    bool operator!=(const locale& other) const;                              // removed C++20
    template <class charT, class Traits, class Allocator>
      bool operator()(const basic_string<charT,Traits,Allocator>& s1,
                      const basic_string<charT,Traits,Allocator>& s2) const;

    // global locale objects:
    static locale global(const locale&);
    static const locale& classic();
};

template <class Facet> const Facet& use_facet(const locale&);
template <class Facet> bool has_facet(const locale&) noexcept;

// 22.3.3, convenience interfaces:
template <class charT> bool isspace (charT c, const locale& loc);
template <class charT> bool isprint (charT c, const locale& loc);
template <class charT> bool iscntrl (charT c, const locale& loc);
template <class charT> bool isupper (charT c, const locale& loc);
template <class charT> bool islower (charT c, const locale& loc);
template <class charT> bool isalpha (charT c, const locale& loc);
template <class charT> bool isdigit (charT c, const locale& loc);
template <class charT> bool ispunct (charT c, const locale& loc);
template <class charT> bool isxdigit(charT c, const locale& loc);
template <class charT> bool isalnum (charT c, const locale& loc);
template <class charT> bool isgraph (charT c, const locale& loc);
template <class charT> charT toupper(charT c, const locale& loc);
template <class charT> charT tolower(charT c, const locale& loc);

template<class Codecvt, class Elem = wchar_t,
         class Wide_alloc = allocator<Elem>,
         class Byte_alloc = allocator<char>>
class wstring_convert                                      // Removed in C++26
{
public:
    typedef basic_string<char, char_traits<char>, Byte_alloc> byte_string;
    typedef basic_string<Elem, char_traits<Elem>, Wide_alloc> wide_string;
    typedef typename Codecvt::state_type                      state_type;
    typedef typename wide_string::traits_type::int_type       int_type;

    wstring_convert(Codecvt* pcvt = new Codecvt);          // before C++14
    explicit wstring_convert(Codecvt* pcvt = new Codecvt); // before C++20
    wstring_convert() : wstring_convert(new Codecvt) {}    // C++20
    explicit wstring_convert(Codecvt* pcvt);               // C++20

    wstring_convert(Codecvt* pcvt, state_type state);
    explicit wstring_convert(const byte_string& byte_err,           // explicit in C++14
                    const wide_string& wide_err = wide_string());
    wstring_convert(const wstring_convert&) = delete;               // C++14
    wstring_convert & operator=(const wstring_convert &) = delete;  // C++14
    ~wstring_convert();

    wide_string from_bytes(char byte);
    wide_string from_bytes(const char* ptr);
    wide_string from_bytes(const byte_string& str);
    wide_string from_bytes(const char* first, const char* last);

    byte_string to_bytes(Elem wchar);
    byte_string to_bytes(const Elem* wptr);
    byte_string to_bytes(const wide_string& wstr);
    byte_string to_bytes(const Elem* first, const Elem* last);

    size_t converted() const; // noexcept in C++14
    state_type state() const;
};

template <class Codecvt, class Elem = wchar_t, class Tr = char_traits<Elem>>
class wbuffer_convert                                               // Removed in C++26
    : public basic_streambuf<Elem, Tr>
{
public:
    typedef typename Tr::state_type state_type;

    wbuffer_convert(streambuf* bytebuf = 0, Codecvt* pcvt = new Codecvt,
                    state_type state = state_type());          // before C++14
    explicit wbuffer_convert(streambuf* bytebuf = nullptr, Codecvt* pcvt = new Codecvt,
                            state_type state = state_type()); // before C++20
    wbuffer_convert() : wbuffer_convert(nullptr) {} // C++20
    explicit wbuffer_convert(streambuf* bytebuf, Codecvt* pcvt = new Codecvt,
                            state_type state = state_type()); // C++20

    wbuffer_convert(const wbuffer_convert&) = delete;               // C++14
    wbuffer_convert & operator=(const wbuffer_convert &) = delete;  // C++14
    ~wbuffer_convert();                                             // C++14

    streambuf* rdbuf() const;
    streambuf* rdbuf(streambuf* bytebuf);

    state_type state() const;
};

// 22.4.1 and 22.4.1.3, ctype:
class ctype_base;
template <class charT> class ctype;
template <> class ctype<char>; // specialization
template <class charT> class ctype_byname;
template <> class ctype_byname<char>; // specialization

class codecvt_base;
template <class internT, class externT, class stateT> class codecvt;
template <class internT, class externT, class stateT> class codecvt_byname;

// 22.4.2 and 22.4.3, numeric:
template <class charT, class InputIterator> class num_get;
template <class charT, class OutputIterator> class num_put;
template <class charT> class numpunct;
template <class charT> class numpunct_byname;

// 22.4.4, col lation:
template <class charT> class collate;
template <class charT> class collate_byname;

// 22.4.5, date and time:
class time_base;
template <class charT, class InputIterator> class time_get;
template <class charT, class InputIterator> class time_get_byname;
template <class charT, class OutputIterator> class time_put;
template <class charT, class OutputIterator> class time_put_byname;

// 22.4.6, money:
class money_base;
template <class charT, class InputIterator> class money_get;
template <class charT, class OutputIterator> class money_put;
template <class charT, bool Intl> class moneypunct;
template <class charT, bool Intl> class moneypunct_byname;

// 22.4.7, message retrieval:
class messages_base;
template <class charT> class messages;
template <class charT> class messages_byname;

}  // std

*/

#include <__config>

#if !defined(_LIBCPP_HAS_NO_LOCALIZATION)

#  include <__algorithm/copy.h>
#  include <__algorithm/equal.h>
#  include <__algorithm/find.h>
#  include <__algorithm/max.h>
#  include <__algorithm/reverse.h>
#  include <__algorithm/unwrap_iter.h>
#  include <__assert>
#  include <__iterator/access.h>
#  include <__iterator/back_insert_iterator.h>
#  include <__iterator/istreambuf_iterator.h>
#  include <__iterator/ostreambuf_iterator.h>
#  include <__locale>
#  include <__memory/unique_ptr.h>
#  include <__type_traits/make_unsigned.h>
#  include <cerrno>
#  include <cstdio>
#  include <cstdlib>
#  include <ctime>
#  include <ios>
#  include <limits>
#  include <new>
#  include <streambuf>
#  include <version>

// TODO: Fix __bsd_locale_defaults.h
// NOLINTBEGIN(libcpp-robust-against-adl)

#  if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
// Most unix variants have catopen.  These are the specific ones that don't.
#    if !defined(__BIONIC__) && !defined(_NEWLIB_VERSION) && !defined(__EMSCRIPTEN__)
#      define _LIBCPP_HAS_CATOPEN 1
#      include <nl_types.h>
#    endif
#  endif

#  ifdef _LIBCPP_LOCALE__L_EXTENSIONS
#    include <__locale_dir/locale_base_api/bsd_locale_defaults.h>
#  else
#    include <__locale_dir/locale_base_api/bsd_locale_fallbacks.h>
#  endif

#  if defined(__APPLE__) || defined(__FreeBSD__)
#    include <xlocale.h>
#  endif

#  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#    pragma GCC system_header
#  endif

_LIBCPP_PUSH_MACROS
#  include <__undef_macros>

_LIBCPP_BEGIN_NAMESPACE_STD

#  if defined(__APPLE__) || defined(__FreeBSD__)
#    define _LIBCPP_GET_C_LOCALE 0
#  elif defined(__NetBSD__)
#    define _LIBCPP_GET_C_LOCALE LC_C_LOCALE
#  else
#    define _LIBCPP_GET_C_LOCALE __cloc()
// Get the C locale object
_LIBCPP_EXPORTED_FROM_ABI locale_t __cloc();
#    define __cloc_defined
#  endif

// __scan_keyword
// Scans [__b, __e) until a match is found in the basic_strings range
//  [__kb, __ke) or until it can be shown that there is no match in [__kb, __ke).
//  __b will be incremented (visibly), consuming CharT until a match is found
//  or proved to not exist.  A keyword may be "", in which will match anything.
//  If one keyword is a prefix of another, and the next CharT in the input
//  might match another keyword, the algorithm will attempt to find the longest
//  matching keyword.  If the longer matching keyword ends up not matching, then
//  no keyword match is found.  If no keyword match is found, __ke is returned
//  and failbit is set in __err.
//  Else an iterator pointing to the matching keyword is found.  If more than
//  one keyword matches, an iterator to the first matching keyword is returned.
//  If on exit __b == __e, eofbit is set in __err.  If __case_sensitive is false,
//  __ct is used to force to lower case before comparing characters.
//  Examples:
//  Keywords:  "a", "abb"
//  If the input is "a", the first keyword matches and eofbit is set.
//  If the input is "abc", no match is found and "ab" are consumed.
template <class _InputIterator, class _ForwardIterator, class _Ctype>
_LIBCPP_HIDE_FROM_ABI _ForwardIterator __scan_keyword(
    _InputIterator& __b,
    _InputIterator __e,
    _ForwardIterator __kb,
    _ForwardIterator __ke,
    const _Ctype& __ct,
    ios_base::iostate& __err,
    bool __case_sensitive = true) {
  typedef typename iterator_traits<_InputIterator>::value_type _CharT;
  size_t __nkw                       = static_cast<size_t>(std::distance(__kb, __ke));
  const unsigned char __doesnt_match = '\0';
  const unsigned char __might_match  = '\1';
  const unsigned char __does_match   = '\2';
  unsigned char __statbuf[100];
  unsigned char* __status = __statbuf;
  unique_ptr<unsigned char, void (*)(void*)> __stat_hold(nullptr, free);
  if (__nkw > sizeof(__statbuf)) {
    __status = (unsigned char*)malloc(__nkw);
    if (__status == nullptr)
      __throw_bad_alloc();
    __stat_hold.reset(__status);
  }
  size_t __n_might_match = __nkw; // At this point, any keyword might match
  size_t __n_does_match  = 0;     // but none of them definitely do
  // Initialize all statuses to __might_match, except for "" keywords are __does_match
  unsigned char* __st = __status;
  for (_ForwardIterator __ky = __kb; __ky != __ke; ++__ky, (void)++__st) {
    if (!__ky->empty())
      *__st = __might_match;
    else {
      *__st = __does_match;
      --__n_might_match;
      ++__n_does_match;
    }
  }
  // While there might be a match, test keywords against the next CharT
  for (size_t __indx = 0; __b != __e && __n_might_match > 0; ++__indx) {
    // Peek at the next CharT but don't consume it
    _CharT __c = *__b;
    if (!__case_sensitive)
      __c = __ct.toupper(__c);
    bool __consume = false;
    // For each keyword which might match, see if the __indx character is __c
    // If a match if found, consume __c
    // If a match is found, and that is the last character in the keyword,
    //    then that keyword matches.
    // If the keyword doesn't match this character, then change the keyword
    //    to doesn't match
    __st = __status;
    for (_ForwardIterator __ky = __kb; __ky != __ke; ++__ky, (void)++__st) {
      if (*__st == __might_match) {
        _CharT __kc = (*__ky)[__indx];
        if (!__case_sensitive)
          __kc = __ct.toupper(__kc);
        if (__c == __kc) {
          __consume = true;
          if (__ky->size() == __indx + 1) {
            *__st = __does_match;
            --__n_might_match;
            ++__n_does_match;
          }
        } else {
          *__st = __doesnt_match;
          --__n_might_match;
        }
      }
    }
    // consume if we matched a character
    if (__consume) {
      ++__b;
      // If we consumed a character and there might be a matched keyword that
      //   was marked matched on a previous iteration, then such keywords
      //   which are now marked as not matching.
      if (__n_might_match + __n_does_match > 1) {
        __st = __status;
        for (_ForwardIterator __ky = __kb; __ky != __ke; ++__ky, (void)++__st) {
          if (*__st == __does_match && __ky->size() != __indx + 1) {
            *__st = __doesnt_match;
            --__n_does_match;
          }
        }
      }
    }
  }
  // We've exited the loop because we hit eof and/or we have no more "might matches".
  if (__b == __e)
    __err |= ios_base::eofbit;
  // Return the first matching result
  for (__st = __status; __kb != __ke; ++__kb, (void)++__st)
    if (*__st == __does_match)
      break;
  if (__kb == __ke)
    __err |= ios_base::failbit;
  return __kb;
}

struct _LIBCPP_EXPORTED_FROM_ABI __num_get_base {
  static const int __num_get_buf_sz = 40;

  static int __get_base(ios_base&);
  static const char __src[33]; // "0123456789abcdefABCDEFxX+-pPiInN"
  // count of leading characters in __src used for parsing integers ("012..X+-")
  static const size_t __int_chr_cnt = 26;
  // count of leading characters in __src used for parsing floating-point values ("012..-pP")
  static const size_t __fp_chr_cnt = 28;
};

_LIBCPP_EXPORTED_FROM_ABI void
__check_grouping(const string& __grouping, unsigned* __g, unsigned* __g_end, ios_base::iostate& __err);

template <class _CharT>
struct __num_get : protected __num_get_base {
  static string __stage2_float_prep(ios_base& __iob, _CharT* __atoms, _CharT& __decimal_point, _CharT& __thousands_sep);

  static int __stage2_float_loop(
      _CharT __ct,
      bool& __in_units,
      char& __exp,
      char* __a,
      char*& __a_end,
      _CharT __decimal_point,
      _CharT __thousands_sep,
      const string& __grouping,
      unsigned* __g,
      unsigned*& __g_end,
      unsigned& __dc,
      _CharT* __atoms);
#  ifndef _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET
  static string __stage2_int_prep(ios_base& __iob, _CharT* __atoms, _CharT& __thousands_sep);
  static int __stage2_int_loop(
      _CharT __ct,
      int __base,
      char* __a,
      char*& __a_end,
      unsigned& __dc,
      _CharT __thousands_sep,
      const string& __grouping,
      unsigned* __g,
      unsigned*& __g_end,
      _CharT* __atoms);

#  else
  static string __stage2_int_prep(ios_base& __iob, _CharT& __thousands_sep) {
    locale __loc                 = __iob.getloc();
    const numpunct<_CharT>& __np = use_facet<numpunct<_CharT> >(__loc);
    __thousands_sep              = __np.thousands_sep();
    return __np.grouping();
  }

  const _CharT* __do_widen(ios_base& __iob, _CharT* __atoms) const { return __do_widen_p(__iob, __atoms); }

  static int __stage2_int_loop(
      _CharT __ct,
      int __base,
      char* __a,
      char*& __a_end,
      unsigned& __dc,
      _CharT __thousands_sep,
      const string& __grouping,
      unsigned* __g,
      unsigned*& __g_end,
      const _CharT* __atoms);

private:
  template <typename _Tp>
  const _Tp* __do_widen_p(ios_base& __iob, _Tp* __atoms) const {
    locale __loc = __iob.getloc();
    use_facet<ctype<_Tp> >(__loc).widen(__src, __src + __int_chr_cnt, __atoms);
    return __atoms;
  }

  const char* __do_widen_p(ios_base& __iob, char* __atoms) const {
    (void)__iob;
    (void)__atoms;
    return __src;
  }
#  endif
};

#  ifndef _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET
template <class _CharT>
string __num_get<_CharT>::__stage2_int_prep(ios_base& __iob, _CharT* __atoms, _CharT& __thousands_sep) {
  locale __loc = __iob.getloc();
  std::use_facet<ctype<_CharT> >(__loc).widen(__src, __src + __int_chr_cnt, __atoms);
  const numpunct<_CharT>& __np = std::use_facet<numpunct<_CharT> >(__loc);
  __thousands_sep              = __np.thousands_sep();
  return __np.grouping();
}
#  endif

template <class _CharT>
string __num_get<_CharT>::__stage2_float_prep(
    ios_base& __iob, _CharT* __atoms, _CharT& __decimal_point, _CharT& __thousands_sep) {
  locale __loc = __iob.getloc();
  std::use_facet<ctype<_CharT> >(__loc).widen(__src, __src + __fp_chr_cnt, __atoms);
  const numpunct<_CharT>& __np = std::use_facet<numpunct<_CharT> >(__loc);
  __decimal_point              = __np.decimal_point();
  __thousands_sep              = __np.thousands_sep();
  return __np.grouping();
}

template <class _CharT>
int
#  ifndef _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET
__num_get<_CharT>::__stage2_int_loop(_CharT __ct, int __base, char* __a, char*& __a_end,
                  unsigned& __dc, _CharT __thousands_sep, const string& __grouping,
                  unsigned* __g, unsigned*& __g_end, _CharT* __atoms)
#  else
__num_get<_CharT>::__stage2_int_loop(_CharT __ct, int __base, char* __a, char*& __a_end,
                  unsigned& __dc, _CharT __thousands_sep, const string& __grouping,
                  unsigned* __g, unsigned*& __g_end, const _CharT* __atoms)

#  endif
{
  if (__a_end == __a && (__ct == __atoms[24] || __ct == __atoms[25])) {
    *__a_end++ = __ct == __atoms[24] ? '+' : '-';
    __dc       = 0;
    return 0;
  }
  if (__grouping.size() != 0 && __ct == __thousands_sep) {
    if (__g_end - __g < __num_get_buf_sz) {
      *__g_end++ = __dc;
      __dc       = 0;
    }
    return 0;
  }
  ptrdiff_t __f = std::find(__atoms, __atoms + __int_chr_cnt, __ct) - __atoms;
  if (__f >= 24)
    return -1;
  switch (__base) {
  case 8:
  case 10:
    if (__f >= __base)
      return -1;
    break;
  case 16:
    if (__f < 22)
      break;
    if (__a_end != __a && __a_end - __a <= 2 && __a_end[-1] == '0') {
      __dc       = 0;
      *__a_end++ = __src[__f];
      return 0;
    }
    return -1;
  }
  *__a_end++ = __src[__f];
  ++__dc;
  return 0;
}

template <class _CharT>
int __num_get<_CharT>::__stage2_float_loop(
    _CharT __ct,
    bool& __in_units,
    char& __exp,
    char* __a,
    char*& __a_end,
    _CharT __decimal_point,
    _CharT __thousands_sep,
    const string& __grouping,
    unsigned* __g,
    unsigned*& __g_end,
    unsigned& __dc,
    _CharT* __atoms) {
  if (__ct == __decimal_point) {
    if (!__in_units)
      return -1;
    __in_units = false;
    *__a_end++ = '.';
    if (__grouping.size() != 0 && __g_end - __g < __num_get_buf_sz)
      *__g_end++ = __dc;
    return 0;
  }
  if (__ct == __thousands_sep && __grouping.size() != 0) {
    if (!__in_units)
      return -1;
    if (__g_end - __g < __num_get_buf_sz) {
      *__g_end++ = __dc;
      __dc       = 0;
    }
    return 0;
  }
  ptrdiff_t __f = std::find(__atoms, __atoms + __num_get_base::__fp_chr_cnt, __ct) - __atoms;
  if (__f >= static_cast<ptrdiff_t>(__num_get_base::__fp_chr_cnt))
    return -1;
  char __x = __src[__f];
  if (__x == '-' || __x == '+') {
    if (__a_end == __a || (std::toupper(__a_end[-1]) == std::toupper(__exp))) {
      *__a_end++ = __x;
      return 0;
    }
    return -1;
  }
  if (__x == 'x' || __x == 'X')
    __exp = 'P';
  else if (std::toupper(__x) == __exp) {
    __exp = std::tolower(__exp);
    if (__in_units) {
      __in_units = false;
      if (__grouping.size() != 0 && __g_end - __g < __num_get_buf_sz)
        *__g_end++ = __dc;
    }
  }
  *__a_end++ = __x;
  if (__f >= 22)
    return 0;
  ++__dc;
  return 0;
}

extern template struct _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __num_get<char>;
#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
extern template struct _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __num_get<wchar_t>;
#  endif

template <class _CharT, class _InputIterator = istreambuf_iterator<_CharT> >
class _LIBCPP_TEMPLATE_VIS num_get : public locale::facet, private __num_get<_CharT> {
public:
  typedef _CharT char_type;
  typedef _InputIterator iter_type;

  _LIBCPP_HIDE_FROM_ABI explicit num_get(size_t __refs = 0) : locale::facet(__refs) {}

  _LIBCPP_HIDE_FROM_ABI iter_type
  get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, bool& __v) const {
    return do_get(__b, __e, __iob, __err, __v);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type
  get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, long& __v) const {
    return do_get(__b, __e, __iob, __err, __v);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type
  get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, long long& __v) const {
    return do_get(__b, __e, __iob, __err, __v);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type
  get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, unsigned short& __v) const {
    return do_get(__b, __e, __iob, __err, __v);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type
  get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, unsigned int& __v) const {
    return do_get(__b, __e, __iob, __err, __v);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type
  get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, unsigned long& __v) const {
    return do_get(__b, __e, __iob, __err, __v);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type
  get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, unsigned long long& __v) const {
    return do_get(__b, __e, __iob, __err, __v);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type
  get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, float& __v) const {
    return do_get(__b, __e, __iob, __err, __v);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type
  get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, double& __v) const {
    return do_get(__b, __e, __iob, __err, __v);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type
  get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, long double& __v) const {
    return do_get(__b, __e, __iob, __err, __v);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type
  get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, void*& __v) const {
    return do_get(__b, __e, __iob, __err, __v);
  }

  static locale::id id;

protected:
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~num_get() override {}

  template <class _Fp>
  _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS iter_type
  __do_get_floating_point(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, _Fp& __v) const;

  template <class _Signed>
  _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS iter_type
  __do_get_signed(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, _Signed& __v) const;

  template <class _Unsigned>
  _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS iter_type
  __do_get_unsigned(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, _Unsigned& __v) const;

  virtual iter_type do_get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, bool& __v) const;

  virtual iter_type do_get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, long& __v) const {
    return this->__do_get_signed(__b, __e, __iob, __err, __v);
  }

  virtual iter_type
  do_get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, long long& __v) const {
    return this->__do_get_signed(__b, __e, __iob, __err, __v);
  }

  virtual iter_type
  do_get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, unsigned short& __v) const {
    return this->__do_get_unsigned(__b, __e, __iob, __err, __v);
  }

  virtual iter_type
  do_get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, unsigned int& __v) const {
    return this->__do_get_unsigned(__b, __e, __iob, __err, __v);
  }

  virtual iter_type
  do_get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, unsigned long& __v) const {
    return this->__do_get_unsigned(__b, __e, __iob, __err, __v);
  }

  virtual iter_type
  do_get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, unsigned long long& __v) const {
    return this->__do_get_unsigned(__b, __e, __iob, __err, __v);
  }

  virtual iter_type do_get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, float& __v) const {
    return this->__do_get_floating_point(__b, __e, __iob, __err, __v);
  }

  virtual iter_type do_get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, double& __v) const {
    return this->__do_get_floating_point(__b, __e, __iob, __err, __v);
  }

  virtual iter_type
  do_get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, long double& __v) const {
    return this->__do_get_floating_point(__b, __e, __iob, __err, __v);
  }

  virtual iter_type do_get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, void*& __v) const;
};

template <class _CharT, class _InputIterator>
locale::id num_get<_CharT, _InputIterator>::id;

template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp
__num_get_signed_integral(const char* __a, const char* __a_end, ios_base::iostate& __err, int __base) {
  if (__a != __a_end) {
    __libcpp_remove_reference_t<decltype(errno)> __save_errno = errno;
    errno                                                     = 0;
    char* __p2;
    long long __ll                                               = strtoll_l(__a, &__p2, __base, _LIBCPP_GET_C_LOCALE);
    __libcpp_remove_reference_t<decltype(errno)> __current_errno = errno;
    if (__current_errno == 0)
      errno = __save_errno;
    if (__p2 != __a_end) {
      __err = ios_base::failbit;
      return 0;
    } else if (__current_errno == ERANGE || __ll < numeric_limits<_Tp>::min() || numeric_limits<_Tp>::max() < __ll) {
      __err = ios_base::failbit;
      if (__ll > 0)
        return numeric_limits<_Tp>::max();
      else
        return numeric_limits<_Tp>::min();
    }
    return static_cast<_Tp>(__ll);
  }
  __err = ios_base::failbit;
  return 0;
}

template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp
__num_get_unsigned_integral(const char* __a, const char* __a_end, ios_base::iostate& __err, int __base) {
  if (__a != __a_end) {
    const bool __negate = *__a == '-';
    if (__negate && ++__a == __a_end) {
      __err = ios_base::failbit;
      return 0;
    }
    __libcpp_remove_reference_t<decltype(errno)> __save_errno = errno;
    errno                                                     = 0;
    char* __p2;
    unsigned long long __ll                                      = strtoull_l(__a, &__p2, __base, _LIBCPP_GET_C_LOCALE);
    __libcpp_remove_reference_t<decltype(errno)> __current_errno = errno;
    if (__current_errno == 0)
      errno = __save_errno;
    if (__p2 != __a_end) {
      __err = ios_base::failbit;
      return 0;
    } else if (__current_errno == ERANGE || numeric_limits<_Tp>::max() < __ll) {
      __err = ios_base::failbit;
      return numeric_limits<_Tp>::max();
    }
    _Tp __res = static_cast<_Tp>(__ll);
    if (__negate)
      __res = -__res;
    return __res;
  }
  __err = ios_base::failbit;
  return 0;
}

template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp __do_strtod(const char* __a, char** __p2);

template <>
inline _LIBCPP_HIDE_FROM_ABI float __do_strtod<float>(const char* __a, char** __p2) {
  return strtof_l(__a, __p2, _LIBCPP_GET_C_LOCALE);
}

template <>
inline _LIBCPP_HIDE_FROM_ABI double __do_strtod<double>(const char* __a, char** __p2) {
  return strtod_l(__a, __p2, _LIBCPP_GET_C_LOCALE);
}

template <>
inline _LIBCPP_HIDE_FROM_ABI long double __do_strtod<long double>(const char* __a, char** __p2) {
  return strtold_l(__a, __p2, _LIBCPP_GET_C_LOCALE);
}

template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp __num_get_float(const char* __a, const char* __a_end, ios_base::iostate& __err) {
  if (__a != __a_end) {
    __libcpp_remove_reference_t<decltype(errno)> __save_errno = errno;
    errno                                                     = 0;
    char* __p2;
    _Tp __ld                                                     = std::__do_strtod<_Tp>(__a, &__p2);
    __libcpp_remove_reference_t<decltype(errno)> __current_errno = errno;
    if (__current_errno == 0)
      errno = __save_errno;
    if (__p2 != __a_end) {
      __err = ios_base::failbit;
      return 0;
    } else if (__current_errno == ERANGE)
      __err = ios_base::failbit;
    return __ld;
  }
  __err = ios_base::failbit;
  return 0;
}

template <class _CharT, class _InputIterator>
_InputIterator num_get<_CharT, _InputIterator>::do_get(
    iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, bool& __v) const {
  if ((__iob.flags() & ios_base::boolalpha) == 0) {
    long __lv = -1;
    __b       = do_get(__b, __e, __iob, __err, __lv);
    switch (__lv) {
    case 0:
      __v = false;
      break;
    case 1:
      __v = true;
      break;
    default:
      __v   = true;
      __err = ios_base::failbit;
      break;
    }
    return __b;
  }
  const ctype<_CharT>& __ct    = std::use_facet<ctype<_CharT> >(__iob.getloc());
  const numpunct<_CharT>& __np = std::use_facet<numpunct<_CharT> >(__iob.getloc());
  typedef typename numpunct<_CharT>::string_type string_type;
  const string_type __names[2] = {__np.truename(), __np.falsename()};
  const string_type* __i       = std::__scan_keyword(__b, __e, __names, __names + 2, __ct, __err);
  __v                          = __i == __names;
  return __b;
}

// signed

template <class _CharT, class _InputIterator>
template <class _Signed>
_InputIterator num_get<_CharT, _InputIterator>::__do_get_signed(
    iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, _Signed& __v) const {
  // Stage 1
  int __base = this->__get_base(__iob);
  // Stage 2
  char_type __thousands_sep;
  const int __atoms_size = __num_get_base::__int_chr_cnt;
#  ifdef _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET
  char_type __atoms1[__atoms_size];
  const char_type* __atoms = this->__do_widen(__iob, __atoms1);
  string __grouping        = this->__stage2_int_prep(__iob, __thousands_sep);
#  else
  char_type __atoms[__atoms_size];
  string __grouping = this->__stage2_int_prep(__iob, __atoms, __thousands_sep);
#  endif
  string __buf;
  __buf.resize(__buf.capacity());
  char* __a     = &__buf[0];
  char* __a_end = __a;
  unsigned __g[__num_get_base::__num_get_buf_sz];
  unsigned* __g_end = __g;
  unsigned __dc     = 0;
  for (; __b != __e; ++__b) {
    if (__a_end == __a + __buf.size()) {
      size_t __tmp = __buf.size();
      __buf.resize(2 * __buf.size());
      __buf.resize(__buf.capacity());
      __a     = &__buf[0];
      __a_end = __a + __tmp;
    }
    if (this->__stage2_int_loop(*__b, __base, __a, __a_end, __dc, __thousands_sep, __grouping, __g, __g_end, __atoms))
      break;
  }
  if (__grouping.size() != 0 && __g_end - __g < __num_get_base::__num_get_buf_sz)
    *__g_end++ = __dc;
  // Stage 3
  __v = std::__num_get_signed_integral<_Signed>(__a, __a_end, __err, __base);
  // Digit grouping checked
  __check_grouping(__grouping, __g, __g_end, __err);
  // EOF checked
  if (__b == __e)
    __err |= ios_base::eofbit;
  return __b;
}

// unsigned

template <class _CharT, class _InputIterator>
template <class _Unsigned>
_InputIterator num_get<_CharT, _InputIterator>::__do_get_unsigned(
    iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, _Unsigned& __v) const {
  // Stage 1
  int __base = this->__get_base(__iob);
  // Stage 2
  char_type __thousands_sep;
  const int __atoms_size = __num_get_base::__int_chr_cnt;
#  ifdef _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET
  char_type __atoms1[__atoms_size];
  const char_type* __atoms = this->__do_widen(__iob, __atoms1);
  string __grouping        = this->__stage2_int_prep(__iob, __thousands_sep);
#  else
  char_type __atoms[__atoms_size];
  string __grouping = this->__stage2_int_prep(__iob, __atoms, __thousands_sep);
#  endif
  string __buf;
  __buf.resize(__buf.capacity());
  char* __a     = &__buf[0];
  char* __a_end = __a;
  unsigned __g[__num_get_base::__num_get_buf_sz];
  unsigned* __g_end = __g;
  unsigned __dc     = 0;
  for (; __b != __e; ++__b) {
    if (__a_end == __a + __buf.size()) {
      size_t __tmp = __buf.size();
      __buf.resize(2 * __buf.size());
      __buf.resize(__buf.capacity());
      __a     = &__buf[0];
      __a_end = __a + __tmp;
    }
    if (this->__stage2_int_loop(*__b, __base, __a, __a_end, __dc, __thousands_sep, __grouping, __g, __g_end, __atoms))
      break;
  }
  if (__grouping.size() != 0 && __g_end - __g < __num_get_base::__num_get_buf_sz)
    *__g_end++ = __dc;
  // Stage 3
  __v = std::__num_get_unsigned_integral<_Unsigned>(__a, __a_end, __err, __base);
  // Digit grouping checked
  __check_grouping(__grouping, __g, __g_end, __err);
  // EOF checked
  if (__b == __e)
    __err |= ios_base::eofbit;
  return __b;
}

// floating point

template <class _CharT, class _InputIterator>
template <class _Fp>
_InputIterator num_get<_CharT, _InputIterator>::__do_get_floating_point(
    iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, _Fp& __v) const {
  // Stage 1, nothing to do
  // Stage 2
  char_type __atoms[__num_get_base::__fp_chr_cnt];
  char_type __decimal_point;
  char_type __thousands_sep;
  string __grouping = this->__stage2_float_prep(__iob, __atoms, __decimal_point, __thousands_sep);
  string __buf;
  __buf.resize(__buf.capacity());
  char* __a     = &__buf[0];
  char* __a_end = __a;
  unsigned __g[__num_get_base::__num_get_buf_sz];
  unsigned* __g_end        = __g;
  unsigned __dc            = 0;
  bool __in_units          = true;
  char __exp               = 'E';
  bool __is_leading_parsed = false;
  for (; __b != __e; ++__b) {
    if (__a_end == __a + __buf.size()) {
      size_t __tmp = __buf.size();
      __buf.resize(2 * __buf.size());
      __buf.resize(__buf.capacity());
      __a     = &__buf[0];
      __a_end = __a + __tmp;
    }
    if (this->__stage2_float_loop(
            *__b,
            __in_units,
            __exp,
            __a,
            __a_end,
            __decimal_point,
            __thousands_sep,
            __grouping,
            __g,
            __g_end,
            __dc,
            __atoms))
      break;

    // the leading character excluding the sign must be a decimal digit
    if (!__is_leading_parsed) {
      if (__a_end - __a >= 1 && __a[0] != '-' && __a[0] != '+') {
        if (('0' <= __a[0] && __a[0] <= '9') || __a[0] == '.')
          __is_leading_parsed = true;
        else
          break;
      } else if (__a_end - __a >= 2 && (__a[0] == '-' || __a[0] == '+')) {
        if (('0' <= __a[1] && __a[1] <= '9') || __a[1] == '.')
          __is_leading_parsed = true;
        else
          break;
      }
    }
  }
  if (__grouping.size() != 0 && __in_units && __g_end - __g < __num_get_base::__num_get_buf_sz)
    *__g_end++ = __dc;
  // Stage 3
  __v = std::__num_get_float<_Fp>(__a, __a_end, __err);
  // Digit grouping checked
  __check_grouping(__grouping, __g, __g_end, __err);
  // EOF checked
  if (__b == __e)
    __err |= ios_base::eofbit;
  return __b;
}

template <class _CharT, class _InputIterator>
_InputIterator num_get<_CharT, _InputIterator>::do_get(
    iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, void*& __v) const {
  // Stage 1
  int __base = 16;
  // Stage 2
  char_type __atoms[__num_get_base::__int_chr_cnt];
  char_type __thousands_sep = char_type();
  string __grouping;
  std::use_facet<ctype<_CharT> >(__iob.getloc())
      .widen(__num_get_base::__src, __num_get_base::__src + __num_get_base::__int_chr_cnt, __atoms);
  string __buf;
  __buf.resize(__buf.capacity());
  char* __a     = &__buf[0];
  char* __a_end = __a;
  unsigned __g[__num_get_base::__num_get_buf_sz];
  unsigned* __g_end = __g;
  unsigned __dc     = 0;
  for (; __b != __e; ++__b) {
    if (__a_end == __a + __buf.size()) {
      size_t __tmp = __buf.size();
      __buf.resize(2 * __buf.size());
      __buf.resize(__buf.capacity());
      __a     = &__buf[0];
      __a_end = __a + __tmp;
    }
    if (this->__stage2_int_loop(*__b, __base, __a, __a_end, __dc, __thousands_sep, __grouping, __g, __g_end, __atoms))
      break;
  }
  // Stage 3
  __buf.resize(__a_end - __a);
  if (__libcpp_sscanf_l(__buf.c_str(), _LIBCPP_GET_C_LOCALE, "%p", &__v) != 1)
    __err = ios_base::failbit;
  // EOF checked
  if (__b == __e)
    __err |= ios_base::eofbit;
  return __b;
}

extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS num_get<char>;
#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS num_get<wchar_t>;
#  endif

struct _LIBCPP_EXPORTED_FROM_ABI __num_put_base {
protected:
  static void __format_int(char* __fmt, const char* __len, bool __signd, ios_base::fmtflags __flags);
  static bool __format_float(char* __fmt, const char* __len, ios_base::fmtflags __flags);
  static char* __identify_padding(char* __nb, char* __ne, const ios_base& __iob);
};

template <class _CharT>
struct __num_put : protected __num_put_base {
  static void __widen_and_group_int(
      char* __nb, char* __np, char* __ne, _CharT* __ob, _CharT*& __op, _CharT*& __oe, const locale& __loc);
  static void __widen_and_group_float(
      char* __nb, char* __np, char* __ne, _CharT* __ob, _CharT*& __op, _CharT*& __oe, const locale& __loc);
};

template <class _CharT>
void __num_put<_CharT>::__widen_and_group_int(
    char* __nb, char* __np, char* __ne, _CharT* __ob, _CharT*& __op, _CharT*& __oe, const locale& __loc) {
  const ctype<_CharT>& __ct     = std::use_facet<ctype<_CharT> >(__loc);
  const numpunct<_CharT>& __npt = std::use_facet<numpunct<_CharT> >(__loc);
  string __grouping             = __npt.grouping();
  if (__grouping.empty()) {
    __ct.widen(__nb, __ne, __ob);
    __oe = __ob + (__ne - __nb);
  } else {
    __oe       = __ob;
    char* __nf = __nb;
    if (*__nf == '-' || *__nf == '+')
      *__oe++ = __ct.widen(*__nf++);
    if (__ne - __nf >= 2 && __nf[0] == '0' && (__nf[1] == 'x' || __nf[1] == 'X')) {
      *__oe++ = __ct.widen(*__nf++);
      *__oe++ = __ct.widen(*__nf++);
    }
    std::reverse(__nf, __ne);
    _CharT __thousands_sep = __npt.thousands_sep();
    unsigned __dc          = 0;
    unsigned __dg          = 0;
    for (char* __p = __nf; __p < __ne; ++__p) {
      if (static_cast<unsigned>(__grouping[__dg]) > 0 && __dc == static_cast<unsigned>(__grouping[__dg])) {
        *__oe++ = __thousands_sep;
        __dc    = 0;
        if (__dg < __grouping.size() - 1)
          ++__dg;
      }
      *__oe++ = __ct.widen(*__p);
      ++__dc;
    }
    std::reverse(__ob + (__nf - __nb), __oe);
  }
  if (__np == __ne)
    __op = __oe;
  else
    __op = __ob + (__np - __nb);
}

template <class _CharT>
void __num_put<_CharT>::__widen_and_group_float(
    char* __nb, char* __np, char* __ne, _CharT* __ob, _CharT*& __op, _CharT*& __oe, const locale& __loc) {
  const ctype<_CharT>& __ct     = std::use_facet<ctype<_CharT> >(__loc);
  const numpunct<_CharT>& __npt = std::use_facet<numpunct<_CharT> >(__loc);
  string __grouping             = __npt.grouping();
  __oe                          = __ob;
  char* __nf                    = __nb;
  if (*__nf == '-' || *__nf == '+')
    *__oe++ = __ct.widen(*__nf++);
  char* __ns;
  if (__ne - __nf >= 2 && __nf[0] == '0' && (__nf[1] == 'x' || __nf[1] == 'X')) {
    *__oe++ = __ct.widen(*__nf++);
    *__oe++ = __ct.widen(*__nf++);
    for (__ns = __nf; __ns < __ne; ++__ns)
      if (!isxdigit_l(*__ns, _LIBCPP_GET_C_LOCALE))
        break;
  } else {
    for (__ns = __nf; __ns < __ne; ++__ns)
      if (!isdigit_l(*__ns, _LIBCPP_GET_C_LOCALE))
        break;
  }
  if (__grouping.empty()) {
    __ct.widen(__nf, __ns, __oe);
    __oe += __ns - __nf;
  } else {
    std::reverse(__nf, __ns);
    _CharT __thousands_sep = __npt.thousands_sep();
    unsigned __dc          = 0;
    unsigned __dg          = 0;
    for (char* __p = __nf; __p < __ns; ++__p) {
      if (__grouping[__dg] > 0 && __dc == static_cast<unsigned>(__grouping[__dg])) {
        *__oe++ = __thousands_sep;
        __dc    = 0;
        if (__dg < __grouping.size() - 1)
          ++__dg;
      }
      *__oe++ = __ct.widen(*__p);
      ++__dc;
    }
    std::reverse(__ob + (__nf - __nb), __oe);
  }
  for (__nf = __ns; __nf < __ne; ++__nf) {
    if (*__nf == '.') {
      *__oe++ = __npt.decimal_point();
      ++__nf;
      break;
    } else
      *__oe++ = __ct.widen(*__nf);
  }
  __ct.widen(__nf, __ne, __oe);
  __oe += __ne - __nf;
  if (__np == __ne)
    __op = __oe;
  else
    __op = __ob + (__np - __nb);
}

extern template struct _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __num_put<char>;
#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
extern template struct _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __num_put<wchar_t>;
#  endif

template <class _CharT, class _OutputIterator = ostreambuf_iterator<_CharT> >
class _LIBCPP_TEMPLATE_VIS num_put : public locale::facet, private __num_put<_CharT> {
public:
  typedef _CharT char_type;
  typedef _OutputIterator iter_type;

  _LIBCPP_HIDE_FROM_ABI explicit num_put(size_t __refs = 0) : locale::facet(__refs) {}

  _LIBCPP_HIDE_FROM_ABI iter_type put(iter_type __s, ios_base& __iob, char_type __fl, bool __v) const {
    return do_put(__s, __iob, __fl, __v);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type put(iter_type __s, ios_base& __iob, char_type __fl, long __v) const {
    return do_put(__s, __iob, __fl, __v);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type put(iter_type __s, ios_base& __iob, char_type __fl, long long __v) const {
    return do_put(__s, __iob, __fl, __v);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type put(iter_type __s, ios_base& __iob, char_type __fl, unsigned long __v) const {
    return do_put(__s, __iob, __fl, __v);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type put(iter_type __s, ios_base& __iob, char_type __fl, unsigned long long __v) const {
    return do_put(__s, __iob, __fl, __v);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type put(iter_type __s, ios_base& __iob, char_type __fl, double __v) const {
    return do_put(__s, __iob, __fl, __v);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type put(iter_type __s, ios_base& __iob, char_type __fl, long double __v) const {
    return do_put(__s, __iob, __fl, __v);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type put(iter_type __s, ios_base& __iob, char_type __fl, const void* __v) const {
    return do_put(__s, __iob, __fl, __v);
  }

  static locale::id id;

protected:
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~num_put() override {}

  virtual iter_type do_put(iter_type __s, ios_base& __iob, char_type __fl, bool __v) const;
  virtual iter_type do_put(iter_type __s, ios_base& __iob, char_type __fl, long __v) const;
  virtual iter_type do_put(iter_type __s, ios_base& __iob, char_type __fl, long long __v) const;
  virtual iter_type do_put(iter_type __s, ios_base& __iob, char_type __fl, unsigned long) const;
  virtual iter_type do_put(iter_type __s, ios_base& __iob, char_type __fl, unsigned long long) const;
  virtual iter_type do_put(iter_type __s, ios_base& __iob, char_type __fl, double __v) const;
  virtual iter_type do_put(iter_type __s, ios_base& __iob, char_type __fl, long double __v) const;
  virtual iter_type do_put(iter_type __s, ios_base& __iob, char_type __fl, const void* __v) const;

  template <class _Integral>
  _LIBCPP_HIDE_FROM_ABI inline _OutputIterator
  __do_put_integral(iter_type __s, ios_base& __iob, char_type __fl, _Integral __v, char const* __len) const;

  template <class _Float>
  _LIBCPP_HIDE_FROM_ABI inline _OutputIterator
  __do_put_floating_point(iter_type __s, ios_base& __iob, char_type __fl, _Float __v, char const* __len) const;
};

template <class _CharT, class _OutputIterator>
locale::id num_put<_CharT, _OutputIterator>::id;

template <class _CharT, class _OutputIterator>
_LIBCPP_HIDE_FROM_ABI _OutputIterator __pad_and_output(
    _OutputIterator __s, const _CharT* __ob, const _CharT* __op, const _CharT* __oe, ios_base& __iob, _CharT __fl) {
  streamsize __sz = __oe - __ob;
  streamsize __ns = __iob.width();
  if (__ns > __sz)
    __ns -= __sz;
  else
    __ns = 0;
  for (; __ob < __op; ++__ob, ++__s)
    *__s = *__ob;
  for (; __ns; --__ns, ++__s)
    *__s = __fl;
  for (; __ob < __oe; ++__ob, ++__s)
    *__s = *__ob;
  __iob.width(0);
  return __s;
}

template <class _CharT, class _Traits>
_LIBCPP_HIDE_FROM_ABI ostreambuf_iterator<_CharT, _Traits> __pad_and_output(
    ostreambuf_iterator<_CharT, _Traits> __s,
    const _CharT* __ob,
    const _CharT* __op,
    const _CharT* __oe,
    ios_base& __iob,
    _CharT __fl) {
  if (__s.__sbuf_ == nullptr)
    return __s;
  streamsize __sz = __oe - __ob;
  streamsize __ns = __iob.width();
  if (__ns > __sz)
    __ns -= __sz;
  else
    __ns = 0;
  streamsize __np = __op - __ob;
  if (__np > 0) {
    if (__s.__sbuf_->sputn(__ob, __np) != __np) {
      __s.__sbuf_ = nullptr;
      return __s;
    }
  }
  if (__ns > 0) {
    basic_string<_CharT, _Traits> __sp(__ns, __fl);
    if (__s.__sbuf_->sputn(__sp.data(), __ns) != __ns) {
      __s.__sbuf_ = nullptr;
      return __s;
    }
  }
  __np = __oe - __op;
  if (__np > 0) {
    if (__s.__sbuf_->sputn(__op, __np) != __np) {
      __s.__sbuf_ = nullptr;
      return __s;
    }
  }
  __iob.width(0);
  return __s;
}

template <class _CharT, class _OutputIterator>
_OutputIterator
num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob, char_type __fl, bool __v) const {
  if ((__iob.flags() & ios_base::boolalpha) == 0)
    return do_put(__s, __iob, __fl, (unsigned long)__v);
  const numpunct<char_type>& __np = std::use_facet<numpunct<char_type> >(__iob.getloc());
  typedef typename numpunct<char_type>::string_type string_type;
  string_type __nm = __v ? __np.truename() : __np.falsename();
  for (typename string_type::iterator __i = __nm.begin(); __i != __nm.end(); ++__i, ++__s)
    *__s = *__i;
  return __s;
}

template <class _CharT, class _OutputIterator>
template <class _Integral>
_LIBCPP_HIDE_FROM_ABI inline _OutputIterator num_put<_CharT, _OutputIterator>::__do_put_integral(
    iter_type __s, ios_base& __iob, char_type __fl, _Integral __v, char const* __len) const {
  // Stage 1 - Get number in narrow char
  char __fmt[8] = {'%', 0};
  this->__format_int(__fmt + 1, __len, is_signed<_Integral>::value, __iob.flags());
  // Worst case is octal, with showbase enabled. Note that octal is always
  // printed as an unsigned value.
  using _Unsigned = typename make_unsigned<_Integral>::type;
  _LIBCPP_CONSTEXPR const unsigned __nbuf =
      (numeric_limits<_Unsigned>::digits / 3)          // 1 char per 3 bits
      + ((numeric_limits<_Unsigned>::digits % 3) != 0) // round up
      + 2;                                             // base prefix + terminating null character
  char __nar[__nbuf];
  _LIBCPP_DIAGNOSTIC_PUSH
  _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wformat-nonliteral")
  _LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wformat-nonliteral")
  int __nc = __libcpp_snprintf_l(__nar, sizeof(__nar), _LIBCPP_GET_C_LOCALE, __fmt, __v);
  _LIBCPP_DIAGNOSTIC_POP
  char* __ne = __nar + __nc;
  char* __np = this->__identify_padding(__nar, __ne, __iob);
  // Stage 2 - Widen __nar while adding thousands separators
  char_type __o[2 * (__nbuf - 1) - 1];
  char_type* __op; // pad here
  char_type* __oe; // end of output
  this->__widen_and_group_int(__nar, __np, __ne, __o, __op, __oe, __iob.getloc());
  // [__o, __oe) contains thousands_sep'd wide number
  // Stage 3 & 4
  return std::__pad_and_output(__s, __o, __op, __oe, __iob, __fl);
}

template <class _CharT, class _OutputIterator>
_OutputIterator
num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob, char_type __fl, long __v) const {
  return this->__do_put_integral(__s, __iob, __fl, __v, "l");
}

template <class _CharT, class _OutputIterator>
_OutputIterator
num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob, char_type __fl, long long __v) const {
  return this->__do_put_integral(__s, __iob, __fl, __v, "ll");
}

template <class _CharT, class _OutputIterator>
_OutputIterator
num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob, char_type __fl, unsigned long __v) const {
  return this->__do_put_integral(__s, __iob, __fl, __v, "l");
}

template <class _CharT, class _OutputIterator>
_OutputIterator
num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob, char_type __fl, unsigned long long __v) const {
  return this->__do_put_integral(__s, __iob, __fl, __v, "ll");
}

template <class _CharT, class _OutputIterator>
template <class _Float>
_LIBCPP_HIDE_FROM_ABI inline _OutputIterator num_put<_CharT, _OutputIterator>::__do_put_floating_point(
    iter_type __s, ios_base& __iob, char_type __fl, _Float __v, char const* __len) const {
  // Stage 1 - Get number in narrow char
  char __fmt[8]            = {'%', 0};
  bool __specify_precision = this->__format_float(__fmt + 1, __len, __iob.flags());
  const unsigned __nbuf    = 30;
  char __nar[__nbuf];
  char* __nb = __nar;
  int __nc;
  _LIBCPP_DIAGNOSTIC_PUSH
  _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wformat-nonliteral")
  _LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wformat-nonliteral")
  if (__specify_precision)
    __nc = __libcpp_snprintf_l(__nb, __nbuf, _LIBCPP_GET_C_LOCALE, __fmt, (int)__iob.precision(), __v);
  else
    __nc = __libcpp_snprintf_l(__nb, __nbuf, _LIBCPP_GET_C_LOCALE, __fmt, __v);
  unique_ptr<char, void (*)(void*)> __nbh(nullptr, free);
  if (__nc > static_cast<int>(__nbuf - 1)) {
    if (__specify_precision)
      __nc = __libcpp_asprintf_l(&__nb, _LIBCPP_GET_C_LOCALE, __fmt, (int)__iob.precision(), __v);
    else
      __nc = __libcpp_asprintf_l(&__nb, _LIBCPP_GET_C_LOCALE, __fmt, __v);
    if (__nc == -1)
      __throw_bad_alloc();
    __nbh.reset(__nb);
  }
  _LIBCPP_DIAGNOSTIC_POP
  char* __ne = __nb + __nc;
  char* __np = this->__identify_padding(__nb, __ne, __iob);
  // Stage 2 - Widen __nar while adding thousands separators
  char_type __o[2 * (__nbuf - 1) - 1];
  char_type* __ob = __o;
  unique_ptr<char_type, void (*)(void*)> __obh(0, free);
  if (__nb != __nar) {
    __ob = (char_type*)malloc(2 * static_cast<size_t>(__nc) * sizeof(char_type));
    if (__ob == 0)
      __throw_bad_alloc();
    __obh.reset(__ob);
  }
  char_type* __op; // pad here
  char_type* __oe; // end of output
  this->__widen_and_group_float(__nb, __np, __ne, __ob, __op, __oe, __iob.getloc());
  // [__o, __oe) contains thousands_sep'd wide number
  // Stage 3 & 4
  __s = std::__pad_and_output(__s, __ob, __op, __oe, __iob, __fl);
  return __s;
}

template <class _CharT, class _OutputIterator>
_OutputIterator
num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob, char_type __fl, double __v) const {
  return this->__do_put_floating_point(__s, __iob, __fl, __v, "");
}

template <class _CharT, class _OutputIterator>
_OutputIterator
num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob, char_type __fl, long double __v) const {
  return this->__do_put_floating_point(__s, __iob, __fl, __v, "L");
}

template <class _CharT, class _OutputIterator>
_OutputIterator
num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob, char_type __fl, const void* __v) const {
  // Stage 1 - Get pointer in narrow char
  const unsigned __nbuf = 20;
  char __nar[__nbuf];
  int __nc   = __libcpp_snprintf_l(__nar, sizeof(__nar), _LIBCPP_GET_C_LOCALE, "%p", __v);
  char* __ne = __nar + __nc;
  char* __np = this->__identify_padding(__nar, __ne, __iob);
  // Stage 2 - Widen __nar
  char_type __o[2 * (__nbuf - 1) - 1];
  char_type* __op; // pad here
  char_type* __oe; // end of output
  const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__iob.getloc());
  __ct.widen(__nar, __ne, __o);
  __oe = __o + (__ne - __nar);
  if (__np == __ne)
    __op = __oe;
  else
    __op = __o + (__np - __nar);
  // [__o, __oe) contains wide number
  // Stage 3 & 4
  return std::__pad_and_output(__s, __o, __op, __oe, __iob, __fl);
}

extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS num_put<char>;
#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS num_put<wchar_t>;
#  endif

template <class _CharT, class _InputIterator>
_LIBCPP_HIDE_FROM_ABI int __get_up_to_n_digits(
    _InputIterator& __b, _InputIterator __e, ios_base::iostate& __err, const ctype<_CharT>& __ct, int __n) {
  // Precondition:  __n >= 1
  if (__b == __e) {
    __err |= ios_base::eofbit | ios_base::failbit;
    return 0;
  }
  // get first digit
  _CharT __c = *__b;
  if (!__ct.is(ctype_base::digit, __c)) {
    __err |= ios_base::failbit;
    return 0;
  }
  int __r = __ct.narrow(__c, 0) - '0';
  for (++__b, (void)--__n; __b != __e && __n > 0; ++__b, (void)--__n) {
    // get next digit
    __c = *__b;
    if (!__ct.is(ctype_base::digit, __c))
      return __r;
    __r = __r * 10 + __ct.narrow(__c, 0) - '0';
  }
  if (__b == __e)
    __err |= ios_base::eofbit;
  return __r;
}

class _LIBCPP_EXPORTED_FROM_ABI time_base {
public:
  enum dateorder { no_order, dmy, mdy, ymd, ydm };
};

template <class _CharT>
class _LIBCPP_TEMPLATE_VIS __time_get_c_storage {
protected:
  typedef basic_string<_CharT> string_type;

  virtual const string_type* __weeks() const;
  virtual const string_type* __months() const;
  virtual const string_type* __am_pm() const;
  virtual const string_type& __c() const;
  virtual const string_type& __r() const;
  virtual const string_type& __x() const;
  virtual const string_type& __X() const;

  _LIBCPP_HIDE_FROM_ABI ~__time_get_c_storage() {}
};

template <>
_LIBCPP_EXPORTED_FROM_ABI const string* __time_get_c_storage<char>::__weeks() const;
template <>
_LIBCPP_EXPORTED_FROM_ABI const string* __time_get_c_storage<char>::__months() const;
template <>
_LIBCPP_EXPORTED_FROM_ABI const string* __time_get_c_storage<char>::__am_pm() const;
template <>
_LIBCPP_EXPORTED_FROM_ABI const string& __time_get_c_storage<char>::__c() const;
template <>
_LIBCPP_EXPORTED_FROM_ABI const string& __time_get_c_storage<char>::__r() const;
template <>
_LIBCPP_EXPORTED_FROM_ABI const string& __time_get_c_storage<char>::__x() const;
template <>
_LIBCPP_EXPORTED_FROM_ABI const string& __time_get_c_storage<char>::__X() const;

#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
template <>
_LIBCPP_EXPORTED_FROM_ABI const wstring* __time_get_c_storage<wchar_t>::__weeks() const;
template <>
_LIBCPP_EXPORTED_FROM_ABI const wstring* __time_get_c_storage<wchar_t>::__months() const;
template <>
_LIBCPP_EXPORTED_FROM_ABI const wstring* __time_get_c_storage<wchar_t>::__am_pm() const;
template <>
_LIBCPP_EXPORTED_FROM_ABI const wstring& __time_get_c_storage<wchar_t>::__c() const;
template <>
_LIBCPP_EXPORTED_FROM_ABI const wstring& __time_get_c_storage<wchar_t>::__r() const;
template <>
_LIBCPP_EXPORTED_FROM_ABI const wstring& __time_get_c_storage<wchar_t>::__x() const;
template <>
_LIBCPP_EXPORTED_FROM_ABI const wstring& __time_get_c_storage<wchar_t>::__X() const;
#  endif

template <class _CharT, class _InputIterator = istreambuf_iterator<_CharT> >
class _LIBCPP_TEMPLATE_VIS time_get : public locale::facet, public time_base, private __time_get_c_storage<_CharT> {
public:
  typedef _CharT char_type;
  typedef _InputIterator iter_type;
  typedef time_base::dateorder dateorder;
  typedef basic_string<char_type> string_type;

  _LIBCPP_HIDE_FROM_ABI explicit time_get(size_t __refs = 0) : locale::facet(__refs) {}

  _LIBCPP_HIDE_FROM_ABI dateorder date_order() const { return this->do_date_order(); }

  _LIBCPP_HIDE_FROM_ABI iter_type
  get_time(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, tm* __tm) const {
    return do_get_time(__b, __e, __iob, __err, __tm);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type
  get_date(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, tm* __tm) const {
    return do_get_date(__b, __e, __iob, __err, __tm);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type
  get_weekday(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, tm* __tm) const {
    return do_get_weekday(__b, __e, __iob, __err, __tm);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type
  get_monthname(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, tm* __tm) const {
    return do_get_monthname(__b, __e, __iob, __err, __tm);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type
  get_year(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, tm* __tm) const {
    return do_get_year(__b, __e, __iob, __err, __tm);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type
  get(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, tm* __tm, char __fmt, char __mod = 0)
      const {
    return do_get(__b, __e, __iob, __err, __tm, __fmt, __mod);
  }

  iter_type
  get(iter_type __b,
      iter_type __e,
      ios_base& __iob,
      ios_base::iostate& __err,
      tm* __tm,
      const char_type* __fmtb,
      const char_type* __fmte) const;

  static locale::id id;

protected:
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~time_get() override {}

  virtual dateorder do_date_order() const;
  virtual iter_type
  do_get_time(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, tm* __tm) const;
  virtual iter_type
  do_get_date(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, tm* __tm) const;
  virtual iter_type
  do_get_weekday(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, tm* __tm) const;
  virtual iter_type
  do_get_monthname(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, tm* __tm) const;
  virtual iter_type
  do_get_year(iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, tm* __tm) const;
  virtual iter_type do_get(
      iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, tm* __tm, char __fmt, char __mod) const;

private:
  void __get_white_space(iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const;
  void __get_percent(iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const;

  void __get_weekdayname(
      int& __m, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const;
  void __get_monthname(
      int& __m, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const;
  void __get_day(int& __d, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const;
  void
  __get_month(int& __m, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const;
  void
  __get_year(int& __y, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const;
  void
  __get_year4(int& __y, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const;
  void
  __get_hour(int& __d, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const;
  void
  __get_12_hour(int& __h, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const;
  void
  __get_am_pm(int& __h, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const;
  void
  __get_minute(int& __m, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const;
  void
  __get_second(int& __s, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const;
  void
  __get_weekday(int& __w, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const;
  void __get_day_year_num(
      int& __w, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const;
};

template <class _CharT, class _InputIterator>
locale::id time_get<_CharT, _InputIterator>::id;

// time_get primitives

template <class _CharT, class _InputIterator>
void time_get<_CharT, _InputIterator>::__get_weekdayname(
    int& __w, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const {
  // Note:  ignoring case comes from the POSIX strptime spec
  const string_type* __wk = this->__weeks();
  ptrdiff_t __i           = std::__scan_keyword(__b, __e, __wk, __wk + 14, __ct, __err, false) - __wk;
  if (__i < 14)
    __w = __i % 7;
}

template <class _CharT, class _InputIterator>
void time_get<_CharT, _InputIterator>::__get_monthname(
    int& __m, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const {
  // Note:  ignoring case comes from the POSIX strptime spec
  const string_type* __month = this->__months();
  ptrdiff_t __i              = std::__scan_keyword(__b, __e, __month, __month + 24, __ct, __err, false) - __month;
  if (__i < 24)
    __m = __i % 12;
}

template <class _CharT, class _InputIterator>
void time_get<_CharT, _InputIterator>::__get_day(
    int& __d, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const {
  int __t = std::__get_up_to_n_digits(__b, __e, __err, __ct, 2);
  if (!(__err & ios_base::failbit) && 1 <= __t && __t <= 31)
    __d = __t;
  else
    __err |= ios_base::failbit;
}

template <class _CharT, class _InputIterator>
void time_get<_CharT, _InputIterator>::__get_month(
    int& __m, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const {
  int __t = std::__get_up_to_n_digits(__b, __e, __err, __ct, 2) - 1;
  if (!(__err & ios_base::failbit) && 0 <= __t && __t <= 11)
    __m = __t;
  else
    __err |= ios_base::failbit;
}

template <class _CharT, class _InputIterator>
void time_get<_CharT, _InputIterator>::__get_year(
    int& __y, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const {
  int __t = std::__get_up_to_n_digits(__b, __e, __err, __ct, 4);
  if (!(__err & ios_base::failbit)) {
    if (__t < 69)
      __t += 2000;
    else if (69 <= __t && __t <= 99)
      __t += 1900;
    __y = __t - 1900;
  }
}

template <class _CharT, class _InputIterator>
void time_get<_CharT, _InputIterator>::__get_year4(
    int& __y, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const {
  int __t = std::__get_up_to_n_digits(__b, __e, __err, __ct, 4);
  if (!(__err & ios_base::failbit))
    __y = __t - 1900;
}

template <class _CharT, class _InputIterator>
void time_get<_CharT, _InputIterator>::__get_hour(
    int& __h, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const {
  int __t = std::__get_up_to_n_digits(__b, __e, __err, __ct, 2);
  if (!(__err & ios_base::failbit) && __t <= 23)
    __h = __t;
  else
    __err |= ios_base::failbit;
}

template <class _CharT, class _InputIterator>
void time_get<_CharT, _InputIterator>::__get_12_hour(
    int& __h, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const {
  int __t = std::__get_up_to_n_digits(__b, __e, __err, __ct, 2);
  if (!(__err & ios_base::failbit) && 1 <= __t && __t <= 12)
    __h = __t;
  else
    __err |= ios_base::failbit;
}

template <class _CharT, class _InputIterator>
void time_get<_CharT, _InputIterator>::__get_minute(
    int& __m, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const {
  int __t = std::__get_up_to_n_digits(__b, __e, __err, __ct, 2);
  if (!(__err & ios_base::failbit) && __t <= 59)
    __m = __t;
  else
    __err |= ios_base::failbit;
}

template <class _CharT, class _InputIterator>
void time_get<_CharT, _InputIterator>::__get_second(
    int& __s, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const {
  int __t = std::__get_up_to_n_digits(__b, __e, __err, __ct, 2);
  if (!(__err & ios_base::failbit) && __t <= 60)
    __s = __t;
  else
    __err |= ios_base::failbit;
}

template <class _CharT, class _InputIterator>
void time_get<_CharT, _InputIterator>::__get_weekday(
    int& __w, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const {
  int __t = std::__get_up_to_n_digits(__b, __e, __err, __ct, 1);
  if (!(__err & ios_base::failbit) && __t <= 6)
    __w = __t;
  else
    __err |= ios_base::failbit;
}

template <class _CharT, class _InputIterator>
void time_get<_CharT, _InputIterator>::__get_day_year_num(
    int& __d, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const {
  int __t = std::__get_up_to_n_digits(__b, __e, __err, __ct, 3);
  if (!(__err & ios_base::failbit) && __t <= 365)
    __d = __t;
  else
    __err |= ios_base::failbit;
}

template <class _CharT, class _InputIterator>
void time_get<_CharT, _InputIterator>::__get_white_space(
    iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const {
  for (; __b != __e && __ct.is(ctype_base::space, *__b); ++__b)
    ;
  if (__b == __e)
    __err |= ios_base::eofbit;
}

template <class _CharT, class _InputIterator>
void time_get<_CharT, _InputIterator>::__get_am_pm(
    int& __h, iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const {
  const string_type* __ap = this->__am_pm();
  if (__ap[0].size() + __ap[1].size() == 0) {
    __err |= ios_base::failbit;
    return;
  }
  ptrdiff_t __i = std::__scan_keyword(__b, __e, __ap, __ap + 2, __ct, __err, false) - __ap;
  if (__i == 0 && __h == 12)
    __h = 0;
  else if (__i == 1 && __h < 12)
    __h += 12;
}

template <class _CharT, class _InputIterator>
void time_get<_CharT, _InputIterator>::__get_percent(
    iter_type& __b, iter_type __e, ios_base::iostate& __err, const ctype<char_type>& __ct) const {
  if (__b == __e) {
    __err |= ios_base::eofbit | ios_base::failbit;
    return;
  }
  if (__ct.narrow(*__b, 0) != '%')
    __err |= ios_base::failbit;
  else if (++__b == __e)
    __err |= ios_base::eofbit;
}

// time_get end primitives

template <class _CharT, class _InputIterator>
_InputIterator time_get<_CharT, _InputIterator>::get(
    iter_type __b,
    iter_type __e,
    ios_base& __iob,
    ios_base::iostate& __err,
    tm* __tm,
    const char_type* __fmtb,
    const char_type* __fmte) const {
  const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__iob.getloc());
  __err                        = ios_base::goodbit;
  while (__fmtb != __fmte && __err == ios_base::goodbit) {
    if (__b == __e) {
      __err = ios_base::failbit;
      break;
    }
    if (__ct.narrow(*__fmtb, 0) == '%') {
      if (++__fmtb == __fmte) {
        __err = ios_base::failbit;
        break;
      }
      char __cmd = __ct.narrow(*__fmtb, 0);
      char __opt = '\0';
      if (__cmd == 'E' || __cmd == '0') {
        if (++__fmtb == __fmte) {
          __err = ios_base::failbit;
          break;
        }
        __opt = __cmd;
        __cmd = __ct.narrow(*__fmtb, 0);
      }
      __b = do_get(__b, __e, __iob, __err, __tm, __cmd, __opt);
      ++__fmtb;
    } else if (__ct.is(ctype_base::space, *__fmtb)) {
      for (++__fmtb; __fmtb != __fmte && __ct.is(ctype_base::space, *__fmtb); ++__fmtb)
        ;
      for (; __b != __e && __ct.is(ctype_base::space, *__b); ++__b)
        ;
    } else if (__ct.toupper(*__b) == __ct.toupper(*__fmtb)) {
      ++__b;
      ++__fmtb;
    } else
      __err = ios_base::failbit;
  }
  if (__b == __e)
    __err |= ios_base::eofbit;
  return __b;
}

template <class _CharT, class _InputIterator>
typename time_get<_CharT, _InputIterator>::dateorder time_get<_CharT, _InputIterator>::do_date_order() const {
  return mdy;
}

template <class _CharT, class _InputIterator>
_InputIterator time_get<_CharT, _InputIterator>::do_get_time(
    iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, tm* __tm) const {
  const char_type __fmt[] = {'%', 'H', ':', '%', 'M', ':', '%', 'S'};
  return get(__b, __e, __iob, __err, __tm, __fmt, __fmt + sizeof(__fmt) / sizeof(__fmt[0]));
}

template <class _CharT, class _InputIterator>
_InputIterator time_get<_CharT, _InputIterator>::do_get_date(
    iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, tm* __tm) const {
  const string_type& __fmt = this->__x();
  return get(__b, __e, __iob, __err, __tm, __fmt.data(), __fmt.data() + __fmt.size());
}

template <class _CharT, class _InputIterator>
_InputIterator time_get<_CharT, _InputIterator>::do_get_weekday(
    iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, tm* __tm) const {
  const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__iob.getloc());
  __get_weekdayname(__tm->tm_wday, __b, __e, __err, __ct);
  return __b;
}

template <class _CharT, class _InputIterator>
_InputIterator time_get<_CharT, _InputIterator>::do_get_monthname(
    iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, tm* __tm) const {
  const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__iob.getloc());
  __get_monthname(__tm->tm_mon, __b, __e, __err, __ct);
  return __b;
}

template <class _CharT, class _InputIterator>
_InputIterator time_get<_CharT, _InputIterator>::do_get_year(
    iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, tm* __tm) const {
  const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__iob.getloc());
  __get_year(__tm->tm_year, __b, __e, __err, __ct);
  return __b;
}

template <class _CharT, class _InputIterator>
_InputIterator time_get<_CharT, _InputIterator>::do_get(
    iter_type __b, iter_type __e, ios_base& __iob, ios_base::iostate& __err, tm* __tm, char __fmt, char) const {
  __err                        = ios_base::goodbit;
  const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__iob.getloc());
  switch (__fmt) {
  case 'a':
  case 'A':
    __get_weekdayname(__tm->tm_wday, __b, __e, __err, __ct);
    break;
  case 'b':
  case 'B':
  case 'h':
    __get_monthname(__tm->tm_mon, __b, __e, __err, __ct);
    break;
  case 'c': {
    const string_type& __fm = this->__c();
    __b                     = get(__b, __e, __iob, __err, __tm, __fm.data(), __fm.data() + __fm.size());
  } break;
  case 'd':
  case 'e':
    __get_day(__tm->tm_mday, __b, __e, __err, __ct);
    break;
  case 'D': {
    const char_type __fm[] = {'%', 'm', '/', '%', 'd', '/', '%', 'y'};
    __b                    = get(__b, __e, __iob, __err, __tm, __fm, __fm + sizeof(__fm) / sizeof(__fm[0]));
  } break;
  case 'F': {
    const char_type __fm[] = {'%', 'Y', '-', '%', 'm', '-', '%', 'd'};
    __b                    = get(__b, __e, __iob, __err, __tm, __fm, __fm + sizeof(__fm) / sizeof(__fm[0]));
  } break;
  case 'H':
    __get_hour(__tm->tm_hour, __b, __e, __err, __ct);
    break;
  case 'I':
    __get_12_hour(__tm->tm_hour, __b, __e, __err, __ct);
    break;
  case 'j':
    __get_day_year_num(__tm->tm_yday, __b, __e, __err, __ct);
    break;
  case 'm':
    __get_month(__tm->tm_mon, __b, __e, __err, __ct);
    break;
  case 'M':
    __get_minute(__tm->tm_min, __b, __e, __err, __ct);
    break;
  case 'n':
  case 't':
    __get_white_space(__b, __e, __err, __ct);
    break;
  case 'p':
    __get_am_pm(__tm->tm_hour, __b, __e, __err, __ct);
    break;
  case 'r': {
    const char_type __fm[] = {'%', 'I', ':', '%', 'M', ':', '%', 'S', ' ', '%', 'p'};
    __b                    = get(__b, __e, __iob, __err, __tm, __fm, __fm + sizeof(__fm) / sizeof(__fm[0]));
  } break;
  case 'R': {
    const char_type __fm[] = {'%', 'H', ':', '%', 'M'};
    __b                    = get(__b, __e, __iob, __err, __tm, __fm, __fm + sizeof(__fm) / sizeof(__fm[0]));
  } break;
  case 'S':
    __get_second(__tm->tm_sec, __b, __e, __err, __ct);
    break;
  case 'T': {
    const char_type __fm[] = {'%', 'H', ':', '%', 'M', ':', '%', 'S'};
    __b                    = get(__b, __e, __iob, __err, __tm, __fm, __fm + sizeof(__fm) / sizeof(__fm[0]));
  } break;
  case 'w':
    __get_weekday(__tm->tm_wday, __b, __e, __err, __ct);
    break;
  case 'x':
    return do_get_date(__b, __e, __iob, __err, __tm);
  case 'X': {
    const string_type& __fm = this->__X();
    __b                     = get(__b, __e, __iob, __err, __tm, __fm.data(), __fm.data() + __fm.size());
  } break;
  case 'y':
    __get_year(__tm->tm_year, __b, __e, __err, __ct);
    break;
  case 'Y':
    __get_year4(__tm->tm_year, __b, __e, __err, __ct);
    break;
  case '%':
    __get_percent(__b, __e, __err, __ct);
    break;
  default:
    __err |= ios_base::failbit;
  }
  return __b;
}

extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_get<char>;
#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_get<wchar_t>;
#  endif

class _LIBCPP_EXPORTED_FROM_ABI __time_get {
protected:
  locale_t __loc_;

  __time_get(const char* __nm);
  __time_get(const string& __nm);
  ~__time_get();
};

template <class _CharT>
class _LIBCPP_TEMPLATE_VIS __time_get_storage : public __time_get {
protected:
  typedef basic_string<_CharT> string_type;

  string_type __weeks_[14];
  string_type __months_[24];
  string_type __am_pm_[2];
  string_type __c_;
  string_type __r_;
  string_type __x_;
  string_type __X_;

  explicit __time_get_storage(const char* __nm);
  explicit __time_get_storage(const string& __nm);

  _LIBCPP_HIDE_FROM_ABI ~__time_get_storage() {}

  time_base::dateorder __do_date_order() const;

private:
  void init(const ctype<_CharT>&);
  string_type __analyze(char __fmt, const ctype<_CharT>&);
};

#  define _LIBCPP_TIME_GET_STORAGE_EXPLICIT_INSTANTIATION(_CharT)                                                      \
    template <>                                                                                                        \
    _LIBCPP_EXPORTED_FROM_ABI time_base::dateorder __time_get_storage<_CharT>::__do_date_order() const;                \
    template <>                                                                                                        \
    _LIBCPP_EXPORTED_FROM_ABI __time_get_storage<_CharT>::__time_get_storage(const char*);                             \
    template <>                                                                                                        \
    _LIBCPP_EXPORTED_FROM_ABI __time_get_storage<_CharT>::__time_get_storage(const string&);                           \
    template <>                                                                                                        \
    _LIBCPP_EXPORTED_FROM_ABI void __time_get_storage<_CharT>::init(const ctype<_CharT>&);                             \
    template <>                                                                                                        \
    _LIBCPP_EXPORTED_FROM_ABI __time_get_storage<_CharT>::string_type __time_get_storage<_CharT>::__analyze(           \
        char, const ctype<_CharT>&);                                                                                   \
    extern template _LIBCPP_EXPORTED_FROM_ABI time_base::dateorder __time_get_storage<_CharT>::__do_date_order()       \
        const;                                                                                                         \
    extern template _LIBCPP_EXPORTED_FROM_ABI __time_get_storage<_CharT>::__time_get_storage(const char*);             \
    extern template _LIBCPP_EXPORTED_FROM_ABI __time_get_storage<_CharT>::__time_get_storage(const string&);           \
    extern template _LIBCPP_EXPORTED_FROM_ABI void __time_get_storage<_CharT>::init(const ctype<_CharT>&);             \
    extern template _LIBCPP_EXPORTED_FROM_ABI __time_get_storage<_CharT>::string_type                                  \
    __time_get_storage<_CharT>::__analyze(char, const ctype<_CharT>&);                                                 \
    /**/

_LIBCPP_TIME_GET_STORAGE_EXPLICIT_INSTANTIATION(char)
#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
_LIBCPP_TIME_GET_STORAGE_EXPLICIT_INSTANTIATION(wchar_t)
#  endif
#  undef _LIBCPP_TIME_GET_STORAGE_EXPLICIT_INSTANTIATION

template <class _CharT, class _InputIterator = istreambuf_iterator<_CharT> >
class _LIBCPP_TEMPLATE_VIS time_get_byname
    : public time_get<_CharT, _InputIterator>,
      private __time_get_storage<_CharT> {
public:
  typedef time_base::dateorder dateorder;
  typedef _InputIterator iter_type;
  typedef _CharT char_type;
  typedef basic_string<char_type> string_type;

  _LIBCPP_HIDE_FROM_ABI explicit time_get_byname(const char* __nm, size_t __refs = 0)
      : time_get<_CharT, _InputIterator>(__refs), __time_get_storage<_CharT>(__nm) {}
  _LIBCPP_HIDE_FROM_ABI explicit time_get_byname(const string& __nm, size_t __refs = 0)
      : time_get<_CharT, _InputIterator>(__refs), __time_get_storage<_CharT>(__nm) {}

protected:
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~time_get_byname() override {}

  _LIBCPP_HIDE_FROM_ABI_VIRTUAL dateorder do_date_order() const override { return this->__do_date_order(); }

private:
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL const string_type* __weeks() const override { return this->__weeks_; }
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL const string_type* __months() const override { return this->__months_; }
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL const string_type* __am_pm() const override { return this->__am_pm_; }
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL const string_type& __c() const override { return this->__c_; }
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL const string_type& __r() const override { return this->__r_; }
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL const string_type& __x() const override { return this->__x_; }
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL const string_type& __X() const override { return this->__X_; }
};

extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_get_byname<char>;
#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_get_byname<wchar_t>;
#  endif

class _LIBCPP_EXPORTED_FROM_ABI __time_put {
  locale_t __loc_;

protected:
  _LIBCPP_HIDE_FROM_ABI __time_put() : __loc_(_LIBCPP_GET_C_LOCALE) {}
  __time_put(const char* __nm);
  __time_put(const string& __nm);
  ~__time_put();
  void __do_put(char* __nb, char*& __ne, const tm* __tm, char __fmt, char __mod) const;
#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
  void __do_put(wchar_t* __wb, wchar_t*& __we, const tm* __tm, char __fmt, char __mod) const;
#  endif
};

template <class _CharT, class _OutputIterator = ostreambuf_iterator<_CharT> >
class _LIBCPP_TEMPLATE_VIS time_put : public locale::facet, private __time_put {
public:
  typedef _CharT char_type;
  typedef _OutputIterator iter_type;

  _LIBCPP_HIDE_FROM_ABI explicit time_put(size_t __refs = 0) : locale::facet(__refs) {}

  iter_type
  put(iter_type __s, ios_base& __iob, char_type __fl, const tm* __tm, const char_type* __pb, const char_type* __pe)
      const;

  _LIBCPP_HIDE_FROM_ABI iter_type
  put(iter_type __s, ios_base& __iob, char_type __fl, const tm* __tm, char __fmt, char __mod = 0) const {
    return do_put(__s, __iob, __fl, __tm, __fmt, __mod);
  }

  static locale::id id;

protected:
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~time_put() override {}
  virtual iter_type do_put(iter_type __s, ios_base&, char_type, const tm* __tm, char __fmt, char __mod) const;

  _LIBCPP_HIDE_FROM_ABI explicit time_put(const char* __nm, size_t __refs) : locale::facet(__refs), __time_put(__nm) {}
  _LIBCPP_HIDE_FROM_ABI explicit time_put(const string& __nm, size_t __refs)
      : locale::facet(__refs), __time_put(__nm) {}
};

template <class _CharT, class _OutputIterator>
locale::id time_put<_CharT, _OutputIterator>::id;

template <class _CharT, class _OutputIterator>
_OutputIterator time_put<_CharT, _OutputIterator>::put(
    iter_type __s, ios_base& __iob, char_type __fl, const tm* __tm, const char_type* __pb, const char_type* __pe)
    const {
  const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__iob.getloc());
  for (; __pb != __pe; ++__pb) {
    if (__ct.narrow(*__pb, 0) == '%') {
      if (++__pb == __pe) {
        *__s++ = __pb[-1];
        break;
      }
      char __mod = 0;
      char __fmt = __ct.narrow(*__pb, 0);
      if (__fmt == 'E' || __fmt == 'O') {
        if (++__pb == __pe) {
          *__s++ = __pb[-2];
          *__s++ = __pb[-1];
          break;
        }
        __mod = __fmt;
        __fmt = __ct.narrow(*__pb, 0);
      }
      __s = do_put(__s, __iob, __fl, __tm, __fmt, __mod);
    } else
      *__s++ = *__pb;
  }
  return __s;
}

template <class _CharT, class _OutputIterator>
_OutputIterator time_put<_CharT, _OutputIterator>::do_put(
    iter_type __s, ios_base&, char_type, const tm* __tm, char __fmt, char __mod) const {
  char_type __nar[100];
  char_type* __nb = __nar;
  char_type* __ne = __nb + 100;
  __do_put(__nb, __ne, __tm, __fmt, __mod);
  return std::copy(__nb, __ne, __s);
}

extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_put<char>;
#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_put<wchar_t>;
#  endif

template <class _CharT, class _OutputIterator = ostreambuf_iterator<_CharT> >
class _LIBCPP_TEMPLATE_VIS time_put_byname : public time_put<_CharT, _OutputIterator> {
public:
  _LIBCPP_HIDE_FROM_ABI explicit time_put_byname(const char* __nm, size_t __refs = 0)
      : time_put<_CharT, _OutputIterator>(__nm, __refs) {}

  _LIBCPP_HIDE_FROM_ABI explicit time_put_byname(const string& __nm, size_t __refs = 0)
      : time_put<_CharT, _OutputIterator>(__nm, __refs) {}

protected:
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~time_put_byname() override {}
};

extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_put_byname<char>;
#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_put_byname<wchar_t>;
#  endif

// money_base

class _LIBCPP_EXPORTED_FROM_ABI money_base {
public:
  enum part { none, space, symbol, sign, value };
  struct pattern {
    char field[4];
  };

  _LIBCPP_HIDE_FROM_ABI money_base() {}
};

// moneypunct

template <class _CharT, bool _International = false>
class _LIBCPP_TEMPLATE_VIS moneypunct : public locale::facet, public money_base {
public:
  typedef _CharT char_type;
  typedef basic_string<char_type> string_type;

  _LIBCPP_HIDE_FROM_ABI explicit moneypunct(size_t __refs = 0) : locale::facet(__refs) {}

  _LIBCPP_HIDE_FROM_ABI char_type decimal_point() const { return do_decimal_point(); }
  _LIBCPP_HIDE_FROM_ABI char_type thousands_sep() const { return do_thousands_sep(); }
  _LIBCPP_HIDE_FROM_ABI string grouping() const { return do_grouping(); }
  _LIBCPP_HIDE_FROM_ABI string_type curr_symbol() const { return do_curr_symbol(); }
  _LIBCPP_HIDE_FROM_ABI string_type positive_sign() const { return do_positive_sign(); }
  _LIBCPP_HIDE_FROM_ABI string_type negative_sign() const { return do_negative_sign(); }
  _LIBCPP_HIDE_FROM_ABI int frac_digits() const { return do_frac_digits(); }
  _LIBCPP_HIDE_FROM_ABI pattern pos_format() const { return do_pos_format(); }
  _LIBCPP_HIDE_FROM_ABI pattern neg_format() const { return do_neg_format(); }

  static locale::id id;
  static const bool intl = _International;

protected:
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~moneypunct() override {}

  virtual char_type do_decimal_point() const { return numeric_limits<char_type>::max(); }
  virtual char_type do_thousands_sep() const { return numeric_limits<char_type>::max(); }
  virtual string do_grouping() const { return string(); }
  virtual string_type do_curr_symbol() const { return string_type(); }
  virtual string_type do_positive_sign() const { return string_type(); }
  virtual string_type do_negative_sign() const { return string_type(1, '-'); }
  virtual int do_frac_digits() const { return 0; }
  virtual pattern do_pos_format() const {
    pattern __p = {{symbol, sign, none, value}};
    return __p;
  }
  virtual pattern do_neg_format() const {
    pattern __p = {{symbol, sign, none, value}};
    return __p;
  }
};

template <class _CharT, bool _International>
locale::id moneypunct<_CharT, _International>::id;

template <class _CharT, bool _International>
const bool moneypunct<_CharT, _International>::intl;

extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct<char, false>;
extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct<char, true>;
#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct<wchar_t, false>;
extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct<wchar_t, true>;
#  endif

// moneypunct_byname

template <class _CharT, bool _International = false>
class _LIBCPP_TEMPLATE_VIS moneypunct_byname : public moneypunct<_CharT, _International> {
public:
  typedef money_base::pattern pattern;
  typedef _CharT char_type;
  typedef basic_string<char_type> string_type;

  _LIBCPP_HIDE_FROM_ABI explicit moneypunct_byname(const char* __nm, size_t __refs = 0)
      : moneypunct<_CharT, _International>(__refs) {
    init(__nm);
  }

  _LIBCPP_HIDE_FROM_ABI explicit moneypunct_byname(const string& __nm, size_t __refs = 0)
      : moneypunct<_CharT, _International>(__refs) {
    init(__nm.c_str());
  }

protected:
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~moneypunct_byname() override {}

  char_type do_decimal_point() const override { return __decimal_point_; }
  char_type do_thousands_sep() const override { return __thousands_sep_; }
  string do_grouping() const override { return __grouping_; }
  string_type do_curr_symbol() const override { return __curr_symbol_; }
  string_type do_positive_sign() const override { return __positive_sign_; }
  string_type do_negative_sign() const override { return __negative_sign_; }
  int do_frac_digits() const override { return __frac_digits_; }
  pattern do_pos_format() const override { return __pos_format_; }
  pattern do_neg_format() const override { return __neg_format_; }

private:
  char_type __decimal_point_;
  char_type __thousands_sep_;
  string __grouping_;
  string_type __curr_symbol_;
  string_type __positive_sign_;
  string_type __negative_sign_;
  int __frac_digits_;
  pattern __pos_format_;
  pattern __neg_format_;

  void init(const char*);
};

template <>
_LIBCPP_EXPORTED_FROM_ABI void moneypunct_byname<char, false>::init(const char*);
template <>
_LIBCPP_EXPORTED_FROM_ABI void moneypunct_byname<char, true>::init(const char*);
extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct_byname<char, false>;
extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct_byname<char, true>;

#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
template <>
_LIBCPP_EXPORTED_FROM_ABI void moneypunct_byname<wchar_t, false>::init(const char*);
template <>
_LIBCPP_EXPORTED_FROM_ABI void moneypunct_byname<wchar_t, true>::init(const char*);
extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct_byname<wchar_t, false>;
extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct_byname<wchar_t, true>;
#  endif

// money_get

template <class _CharT>
class __money_get {
protected:
  typedef _CharT char_type;
  typedef basic_string<char_type> string_type;

  _LIBCPP_HIDE_FROM_ABI __money_get() {}

  static void __gather_info(
      bool __intl,
      const locale& __loc,
      money_base::pattern& __pat,
      char_type& __dp,
      char_type& __ts,
      string& __grp,
      string_type& __sym,
      string_type& __psn,
      string_type& __nsn,
      int& __fd);
};

template <class _CharT>
void __money_get<_CharT>::__gather_info(
    bool __intl,
    const locale& __loc,
    money_base::pattern& __pat,
    char_type& __dp,
    char_type& __ts,
    string& __grp,
    string_type& __sym,
    string_type& __psn,
    string_type& __nsn,
    int& __fd) {
  if (__intl) {
    const moneypunct<char_type, true>& __mp = std::use_facet<moneypunct<char_type, true> >(__loc);
    __pat                                   = __mp.neg_format();
    __nsn                                   = __mp.negative_sign();
    __psn                                   = __mp.positive_sign();
    __dp                                    = __mp.decimal_point();
    __ts                                    = __mp.thousands_sep();
    __grp                                   = __mp.grouping();
    __sym                                   = __mp.curr_symbol();
    __fd                                    = __mp.frac_digits();
  } else {
    const moneypunct<char_type, false>& __mp = std::use_facet<moneypunct<char_type, false> >(__loc);
    __pat                                    = __mp.neg_format();
    __nsn                                    = __mp.negative_sign();
    __psn                                    = __mp.positive_sign();
    __dp                                     = __mp.decimal_point();
    __ts                                     = __mp.thousands_sep();
    __grp                                    = __mp.grouping();
    __sym                                    = __mp.curr_symbol();
    __fd                                     = __mp.frac_digits();
  }
}

extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __money_get<char>;
#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __money_get<wchar_t>;
#  endif

template <class _CharT, class _InputIterator = istreambuf_iterator<_CharT> >
class _LIBCPP_TEMPLATE_VIS money_get : public locale::facet, private __money_get<_CharT> {
public:
  typedef _CharT char_type;
  typedef _InputIterator iter_type;
  typedef basic_string<char_type> string_type;

  _LIBCPP_HIDE_FROM_ABI explicit money_get(size_t __refs = 0) : locale::facet(__refs) {}

  _LIBCPP_HIDE_FROM_ABI iter_type
  get(iter_type __b, iter_type __e, bool __intl, ios_base& __iob, ios_base::iostate& __err, long double& __v) const {
    return do_get(__b, __e, __intl, __iob, __err, __v);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type
  get(iter_type __b, iter_type __e, bool __intl, ios_base& __iob, ios_base::iostate& __err, string_type& __v) const {
    return do_get(__b, __e, __intl, __iob, __err, __v);
  }

  static locale::id id;

protected:
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~money_get() override {}

  virtual iter_type
  do_get(iter_type __b, iter_type __e, bool __intl, ios_base& __iob, ios_base::iostate& __err, long double& __v) const;
  virtual iter_type
  do_get(iter_type __b, iter_type __e, bool __intl, ios_base& __iob, ios_base::iostate& __err, string_type& __v) const;

private:
  static bool __do_get(
      iter_type& __b,
      iter_type __e,
      bool __intl,
      const locale& __loc,
      ios_base::fmtflags __flags,
      ios_base::iostate& __err,
      bool& __neg,
      const ctype<char_type>& __ct,
      unique_ptr<char_type, void (*)(void*)>& __wb,
      char_type*& __wn,
      char_type* __we);
};

template <class _CharT, class _InputIterator>
locale::id money_get<_CharT, _InputIterator>::id;

_LIBCPP_EXPORTED_FROM_ABI void __do_nothing(void*);

template <class _Tp>
_LIBCPP_HIDE_FROM_ABI void __double_or_nothing(unique_ptr<_Tp, void (*)(void*)>& __b, _Tp*& __n, _Tp*& __e) {
  bool __owns      = __b.get_deleter() != __do_nothing;
  size_t __cur_cap = static_cast<size_t>(__e - __b.get()) * sizeof(_Tp);
  size_t __new_cap = __cur_cap < numeric_limits<size_t>::max() / 2 ? 2 * __cur_cap : numeric_limits<size_t>::max();
  if (__new_cap == 0)
    __new_cap = sizeof(_Tp);
  size_t __n_off = static_cast<size_t>(__n - __b.get());
  _Tp* __t       = (_Tp*)std::realloc(__owns ? __b.get() : 0, __new_cap);
  if (__t == 0)
    __throw_bad_alloc();
  if (__owns)
    __b.release();
  __b = unique_ptr<_Tp, void (*)(void*)>(__t, free);
  __new_cap /= sizeof(_Tp);
  __n = __b.get() + __n_off;
  __e = __b.get() + __new_cap;
}

// true == success
template <class _CharT, class _InputIterator>
bool money_get<_CharT, _InputIterator>::__do_get(
    iter_type& __b,
    iter_type __e,
    bool __intl,
    const locale& __loc,
    ios_base::fmtflags __flags,
    ios_base::iostate& __err,
    bool& __neg,
    const ctype<char_type>& __ct,
    unique_ptr<char_type, void (*)(void*)>& __wb,
    char_type*& __wn,
    char_type* __we) {
  if (__b == __e) {
    __err |= ios_base::failbit;
    return false;
  }
  const unsigned __bz = 100;
  unsigned __gbuf[__bz];
  unique_ptr<unsigned, void (*)(void*)> __gb(__gbuf, __do_nothing);
  unsigned* __gn = __gb.get();
  unsigned* __ge = __gn + __bz;
  money_base::pattern __pat;
  char_type __dp;
  char_type __ts;
  string __grp;
  string_type __sym;
  string_type __psn;
  string_type __nsn;
  // Capture the spaces read into money_base::{space,none} so they
  // can be compared to initial spaces in __sym.
  string_type __spaces;
  int __fd;
  __money_get<_CharT>::__gather_info(__intl, __loc, __pat, __dp, __ts, __grp, __sym, __psn, __nsn, __fd);
  const string_type* __trailing_sign = 0;
  __wn                               = __wb.get();
  for (unsigned __p = 0; __p < 4 && __b != __e; ++__p) {
    switch (__pat.field[__p]) {
    case money_base::space:
      if (__p != 3) {
        if (__ct.is(ctype_base::space, *__b))
          __spaces.push_back(*__b++);
        else {
          __err |= ios_base::failbit;
          return false;
        }
      }
      _LIBCPP_FALLTHROUGH();
    case money_base::none:
      if (__p != 3) {
        while (__b != __e && __ct.is(ctype_base::space, *__b))
          __spaces.push_back(*__b++);
      }
      break;
    case money_base::sign:
      if (__psn.size() > 0 && *__b == __psn[0]) {
        ++__b;
        __neg = false;
        if (__psn.size() > 1)
          __trailing_sign = &__psn;
        break;
      }
      if (__nsn.size() > 0 && *__b == __nsn[0]) {
        ++__b;
        __neg = true;
        if (__nsn.size() > 1)
          __trailing_sign = &__nsn;
        break;
      }
      if (__psn.size() > 0 && __nsn.size() > 0) { // sign is required
        __err |= ios_base::failbit;
        return false;
      }
      if (__psn.size() == 0 && __nsn.size() == 0)
        // locale has no way of specifying a sign. Use the initial value of __neg as a default
        break;
      __neg = (__nsn.size() == 0);
      break;
    case money_base::symbol: {
      bool __more_needed =
          __trailing_sign || (__p < 2) || (__p == 2 && __pat.field[3] != static_cast<char>(money_base::none));
      bool __sb = (__flags & ios_base::showbase) != 0;
      if (__sb || __more_needed) {
        typename string_type::const_iterator __sym_space_end = __sym.begin();
        if (__p > 0 && (__pat.field[__p - 1] == money_base::none || __pat.field[__p - 1] == money_base::space)) {
          // Match spaces we've already read against spaces at
          // the beginning of __sym.
          while (__sym_space_end != __sym.end() && __ct.is(ctype_base::space, *__sym_space_end))
            ++__sym_space_end;
          const size_t __num_spaces = __sym_space_end - __sym.begin();
          if (__num_spaces > __spaces.size() ||
              !std::equal(__spaces.end() - __num_spaces, __spaces.end(), __sym.begin())) {
            // No match. Put __sym_space_end back at the
            // beginning of __sym, which will prevent a
            // match in the next loop.
            __sym_space_end = __sym.begin();
          }
        }
        typename string_type::const_iterator __sym_curr_char = __sym_space_end;
        while (__sym_curr_char != __sym.end() && __b != __e && *__b == *__sym_curr_char) {
          ++__b;
          ++__sym_curr_char;
        }
        if (__sb && __sym_curr_char != __sym.end()) {
          __err |= ios_base::failbit;
          return false;
        }
      }
    } break;
    case money_base::value: {
      unsigned __ng = 0;
      for (; __b != __e; ++__b) {
        char_type __c = *__b;
        if (__ct.is(ctype_base::digit, __c)) {
          if (__wn == __we)
            std::__double_or_nothing(__wb, __wn, __we);
          *__wn++ = __c;
          ++__ng;
        } else if (__grp.size() > 0 && __ng > 0 && __c == __ts) {
          if (__gn == __ge)
            std::__double_or_nothing(__gb, __gn, __ge);
          *__gn++ = __ng;
          __ng    = 0;
        } else
          break;
      }
      if (__gb.get() != __gn && __ng > 0) {
        if (__gn == __ge)
          std::__double_or_nothing(__gb, __gn, __ge);
        *__gn++ = __ng;
      }
      if (__fd > 0) {
        if (__b == __e || *__b != __dp) {
          __err |= ios_base::failbit;
          return false;
        }
        for (++__b; __fd > 0; --__fd, ++__b) {
          if (__b == __e || !__ct.is(ctype_base::digit, *__b)) {
            __err |= ios_base::failbit;
            return false;
          }
          if (__wn == __we)
            std::__double_or_nothing(__wb, __wn, __we);
          *__wn++ = *__b;
        }
      }
      if (__wn == __wb.get()) {
        __err |= ios_base::failbit;
        return false;
      }
    } break;
    }
  }
  if (__trailing_sign) {
    for (unsigned __i = 1; __i < __trailing_sign->size(); ++__i, ++__b) {
      if (__b == __e || *__b != (*__trailing_sign)[__i]) {
        __err |= ios_base::failbit;
        return false;
      }
    }
  }
  if (__gb.get() != __gn) {
    ios_base::iostate __et = ios_base::goodbit;
    __check_grouping(__grp, __gb.get(), __gn, __et);
    if (__et) {
      __err |= ios_base::failbit;
      return false;
    }
  }
  return true;
}

template <class _CharT, class _InputIterator>
_InputIterator money_get<_CharT, _InputIterator>::do_get(
    iter_type __b, iter_type __e, bool __intl, ios_base& __iob, ios_base::iostate& __err, long double& __v) const {
  const int __bz = 100;
  char_type __wbuf[__bz];
  unique_ptr<char_type, void (*)(void*)> __wb(__wbuf, __do_nothing);
  char_type* __wn;
  char_type* __we              = __wbuf + __bz;
  locale __loc                 = __iob.getloc();
  const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__loc);
  bool __neg                   = false;
  if (__do_get(__b, __e, __intl, __loc, __iob.flags(), __err, __neg, __ct, __wb, __wn, __we)) {
    const char __src[] = "0123456789";
    char_type __atoms[sizeof(__src) - 1];
    __ct.widen(__src, __src + (sizeof(__src) - 1), __atoms);
    char __nbuf[__bz];
    char* __nc = __nbuf;
    unique_ptr<char, void (*)(void*)> __h(nullptr, free);
    if (__wn - __wb.get() > __bz - 2) {
      __h.reset((char*)malloc(static_cast<size_t>(__wn - __wb.get() + 2)));
      if (__h.get() == nullptr)
        __throw_bad_alloc();
      __nc = __h.get();
    }
    if (__neg)
      *__nc++ = '-';
    for (const char_type* __w = __wb.get(); __w < __wn; ++__w, ++__nc)
      *__nc = __src[std::find(__atoms, std::end(__atoms), *__w) - __atoms];
    *__nc = char();
    if (sscanf(__nbuf, "%Lf", &__v) != 1)
      __throw_runtime_error("money_get error");
  }
  if (__b == __e)
    __err |= ios_base::eofbit;
  return __b;
}

template <class _CharT, class _InputIterator>
_InputIterator money_get<_CharT, _InputIterator>::do_get(
    iter_type __b, iter_type __e, bool __intl, ios_base& __iob, ios_base::iostate& __err, string_type& __v) const {
  const int __bz = 100;
  char_type __wbuf[__bz];
  unique_ptr<char_type, void (*)(void*)> __wb(__wbuf, __do_nothing);
  char_type* __wn;
  char_type* __we              = __wbuf + __bz;
  locale __loc                 = __iob.getloc();
  const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__loc);
  bool __neg                   = false;
  if (__do_get(__b, __e, __intl, __loc, __iob.flags(), __err, __neg, __ct, __wb, __wn, __we)) {
    __v.clear();
    if (__neg)
      __v.push_back(__ct.widen('-'));
    char_type __z = __ct.widen('0');
    char_type* __w;
    for (__w = __wb.get(); __w < __wn - 1; ++__w)
      if (*__w != __z)
        break;
    __v.append(__w, __wn);
  }
  if (__b == __e)
    __err |= ios_base::eofbit;
  return __b;
}

extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS money_get<char>;
#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS money_get<wchar_t>;
#  endif

// money_put

template <class _CharT>
class __money_put {
protected:
  typedef _CharT char_type;
  typedef basic_string<char_type> string_type;

  _LIBCPP_HIDE_FROM_ABI __money_put() {}

  static void __gather_info(
      bool __intl,
      bool __neg,
      const locale& __loc,
      money_base::pattern& __pat,
      char_type& __dp,
      char_type& __ts,
      string& __grp,
      string_type& __sym,
      string_type& __sn,
      int& __fd);
  static void __format(
      char_type* __mb,
      char_type*& __mi,
      char_type*& __me,
      ios_base::fmtflags __flags,
      const char_type* __db,
      const char_type* __de,
      const ctype<char_type>& __ct,
      bool __neg,
      const money_base::pattern& __pat,
      char_type __dp,
      char_type __ts,
      const string& __grp,
      const string_type& __sym,
      const string_type& __sn,
      int __fd);
};

template <class _CharT>
void __money_put<_CharT>::__gather_info(
    bool __intl,
    bool __neg,
    const locale& __loc,
    money_base::pattern& __pat,
    char_type& __dp,
    char_type& __ts,
    string& __grp,
    string_type& __sym,
    string_type& __sn,
    int& __fd) {
  if (__intl) {
    const moneypunct<char_type, true>& __mp = std::use_facet<moneypunct<char_type, true> >(__loc);
    if (__neg) {
      __pat = __mp.neg_format();
      __sn  = __mp.negative_sign();
    } else {
      __pat = __mp.pos_format();
      __sn  = __mp.positive_sign();
    }
    __dp  = __mp.decimal_point();
    __ts  = __mp.thousands_sep();
    __grp = __mp.grouping();
    __sym = __mp.curr_symbol();
    __fd  = __mp.frac_digits();
  } else {
    const moneypunct<char_type, false>& __mp = std::use_facet<moneypunct<char_type, false> >(__loc);
    if (__neg) {
      __pat = __mp.neg_format();
      __sn  = __mp.negative_sign();
    } else {
      __pat = __mp.pos_format();
      __sn  = __mp.positive_sign();
    }
    __dp  = __mp.decimal_point();
    __ts  = __mp.thousands_sep();
    __grp = __mp.grouping();
    __sym = __mp.curr_symbol();
    __fd  = __mp.frac_digits();
  }
}

template <class _CharT>
void __money_put<_CharT>::__format(
    char_type* __mb,
    char_type*& __mi,
    char_type*& __me,
    ios_base::fmtflags __flags,
    const char_type* __db,
    const char_type* __de,
    const ctype<char_type>& __ct,
    bool __neg,
    const money_base::pattern& __pat,
    char_type __dp,
    char_type __ts,
    const string& __grp,
    const string_type& __sym,
    const string_type& __sn,
    int __fd) {
  __me = __mb;
  for (char __p : __pat.field) {
    switch (__p) {
    case money_base::none:
      __mi = __me;
      break;
    case money_base::space:
      __mi    = __me;
      *__me++ = __ct.widen(' ');
      break;
    case money_base::sign:
      if (!__sn.empty())
        *__me++ = __sn[0];
      break;
    case money_base::symbol:
      if (!__sym.empty() && (__flags & ios_base::showbase))
        __me = std::copy(__sym.begin(), __sym.end(), __me);
      break;
    case money_base::value: {
      // remember start of value so we can reverse it
      char_type* __t = __me;
      // find beginning of digits
      if (__neg)
        ++__db;
      // find end of digits
      const char_type* __d;
      for (__d = __db; __d < __de; ++__d)
        if (!__ct.is(ctype_base::digit, *__d))
          break;
      // print fractional part
      if (__fd > 0) {
        int __f;
        for (__f = __fd; __d > __db && __f > 0; --__f)
          *__me++ = *--__d;
        char_type __z = __f > 0 ? __ct.widen('0') : char_type();
        for (; __f > 0; --__f)
          *__me++ = __z;
        *__me++ = __dp;
      }
      // print units part
      if (__d == __db) {
        *__me++ = __ct.widen('0');
      } else {
        unsigned __ng = 0;
        unsigned __ig = 0;
        unsigned __gl = __grp.empty() ? numeric_limits<unsigned>::max() : static_cast<unsigned>(__grp[__ig]);
        while (__d != __db) {
          if (__ng == __gl) {
            *__me++ = __ts;
            __ng    = 0;
            if (++__ig < __grp.size())
              __gl = __grp[__ig] == numeric_limits<char>::max()
                       ? numeric_limits<unsigned>::max()
                       : static_cast<unsigned>(__grp[__ig]);
          }
          *__me++ = *--__d;
          ++__ng;
        }
      }
      // reverse it
      std::reverse(__t, __me);
    } break;
    }
  }
  // print rest of sign, if any
  if (__sn.size() > 1)
    __me = std::copy(__sn.begin() + 1, __sn.end(), __me);
  // set alignment
  if ((__flags & ios_base::adjustfield) == ios_base::left)
    __mi = __me;
  else if ((__flags & ios_base::adjustfield) != ios_base::internal)
    __mi = __mb;
}

extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __money_put<char>;
#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __money_put<wchar_t>;
#  endif

template <class _CharT, class _OutputIterator = ostreambuf_iterator<_CharT> >
class _LIBCPP_TEMPLATE_VIS money_put : public locale::facet, private __money_put<_CharT> {
public:
  typedef _CharT char_type;
  typedef _OutputIterator iter_type;
  typedef basic_string<char_type> string_type;

  _LIBCPP_HIDE_FROM_ABI explicit money_put(size_t __refs = 0) : locale::facet(__refs) {}

  _LIBCPP_HIDE_FROM_ABI iter_type
  put(iter_type __s, bool __intl, ios_base& __iob, char_type __fl, long double __units) const {
    return do_put(__s, __intl, __iob, __fl, __units);
  }

  _LIBCPP_HIDE_FROM_ABI iter_type
  put(iter_type __s, bool __intl, ios_base& __iob, char_type __fl, const string_type& __digits) const {
    return do_put(__s, __intl, __iob, __fl, __digits);
  }

  static locale::id id;

protected:
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~money_put() override {}

  virtual iter_type do_put(iter_type __s, bool __intl, ios_base& __iob, char_type __fl, long double __units) const;
  virtual iter_type
  do_put(iter_type __s, bool __intl, ios_base& __iob, char_type __fl, const string_type& __digits) const;
};

template <class _CharT, class _OutputIterator>
locale::id money_put<_CharT, _OutputIterator>::id;

template <class _CharT, class _OutputIterator>
_OutputIterator money_put<_CharT, _OutputIterator>::do_put(
    iter_type __s, bool __intl, ios_base& __iob, char_type __fl, long double __units) const {
  // convert to char
  const size_t __bs = 100;
  char __buf[__bs];
  char* __bb = __buf;
  char_type __digits[__bs];
  char_type* __db = __digits;
  int __n         = snprintf(__bb, __bs, "%.0Lf", __units);
  unique_ptr<char, void (*)(void*)> __hn(nullptr, free);
  unique_ptr<char_type, void (*)(void*)> __hd(0, free);
  // secure memory for digit storage
  if (static_cast<size_t>(__n) > __bs - 1) {
    __n = __libcpp_asprintf_l(&__bb, _LIBCPP_GET_C_LOCALE, "%.0Lf", __units);
    if (__n == -1)
      __throw_bad_alloc();
    __hn.reset(__bb);
    __hd.reset((char_type*)malloc(static_cast<size_t>(__n) * sizeof(char_type)));
    if (__hd == nullptr)
      __throw_bad_alloc();
    __db = __hd.get();
  }
  // gather info
  locale __loc                 = __iob.getloc();
  const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__loc);
  __ct.widen(__bb, __bb + __n, __db);
  bool __neg = __n > 0 && __bb[0] == '-';
  money_base::pattern __pat;
  char_type __dp;
  char_type __ts;
  string __grp;
  string_type __sym;
  string_type __sn;
  int __fd;
  this->__gather_info(__intl, __neg, __loc, __pat, __dp, __ts, __grp, __sym, __sn, __fd);
  // secure memory for formatting
  char_type __mbuf[__bs];
  char_type* __mb = __mbuf;
  unique_ptr<char_type, void (*)(void*)> __hw(0, free);
  size_t __exn = __n > __fd ? (static_cast<size_t>(__n) - static_cast<size_t>(__fd)) * 2 + __sn.size() + __sym.size() +
                                  static_cast<size_t>(__fd) + 1
                            : __sn.size() + __sym.size() + static_cast<size_t>(__fd) + 2;
  if (__exn > __bs) {
    __hw.reset((char_type*)malloc(__exn * sizeof(char_type)));
    __mb = __hw.get();
    if (__mb == 0)
      __throw_bad_alloc();
  }
  // format
  char_type* __mi;
  char_type* __me;
  this->__format(
      __mb, __mi, __me, __iob.flags(), __db, __db + __n, __ct, __neg, __pat, __dp, __ts, __grp, __sym, __sn, __fd);
  return std::__pad_and_output(__s, __mb, __mi, __me, __iob, __fl);
}

template <class _CharT, class _OutputIterator>
_OutputIterator money_put<_CharT, _OutputIterator>::do_put(
    iter_type __s, bool __intl, ios_base& __iob, char_type __fl, const string_type& __digits) const {
  // gather info
  locale __loc                 = __iob.getloc();
  const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__loc);
  bool __neg                   = __digits.size() > 0 && __digits[0] == __ct.widen('-');
  money_base::pattern __pat;
  char_type __dp;
  char_type __ts;
  string __grp;
  string_type __sym;
  string_type __sn;
  int __fd;
  this->__gather_info(__intl, __neg, __loc, __pat, __dp, __ts, __grp, __sym, __sn, __fd);
  // secure memory for formatting
  char_type __mbuf[100];
  char_type* __mb = __mbuf;
  unique_ptr<char_type, void (*)(void*)> __h(0, free);
  size_t __exn =
      static_cast<int>(__digits.size()) > __fd
          ? (__digits.size() - static_cast<size_t>(__fd)) * 2 + __sn.size() + __sym.size() + static_cast<size_t>(__fd) +
                1
          : __sn.size() + __sym.size() + static_cast<size_t>(__fd) + 2;
  if (__exn > 100) {
    __h.reset((char_type*)malloc(__exn * sizeof(char_type)));
    __mb = __h.get();
    if (__mb == 0)
      __throw_bad_alloc();
  }
  // format
  char_type* __mi;
  char_type* __me;
  this->__format(
      __mb,
      __mi,
      __me,
      __iob.flags(),
      __digits.data(),
      __digits.data() + __digits.size(),
      __ct,
      __neg,
      __pat,
      __dp,
      __ts,
      __grp,
      __sym,
      __sn,
      __fd);
  return std::__pad_and_output(__s, __mb, __mi, __me, __iob, __fl);
}

extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS money_put<char>;
#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS money_put<wchar_t>;
#  endif

// messages

class _LIBCPP_EXPORTED_FROM_ABI messages_base {
public:
  typedef intptr_t catalog;

  _LIBCPP_HIDE_FROM_ABI messages_base() {}
};

template <class _CharT>
class _LIBCPP_TEMPLATE_VIS messages : public locale::facet, public messages_base {
public:
  typedef _CharT char_type;
  typedef basic_string<_CharT> string_type;

  _LIBCPP_HIDE_FROM_ABI explicit messages(size_t __refs = 0) : locale::facet(__refs) {}

  _LIBCPP_HIDE_FROM_ABI catalog open(const basic_string<char>& __nm, const locale& __loc) const {
    return do_open(__nm, __loc);
  }

  _LIBCPP_HIDE_FROM_ABI string_type get(catalog __c, int __set, int __msgid, const string_type& __dflt) const {
    return do_get(__c, __set, __msgid, __dflt);
  }

  _LIBCPP_HIDE_FROM_ABI void close(catalog __c) const { do_close(__c); }

  static locale::id id;

protected:
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~messages() override {}

  virtual catalog do_open(const basic_string<char>&, const locale&) const;
  virtual string_type do_get(catalog, int __set, int __msgid, const string_type& __dflt) const;
  virtual void do_close(catalog) const;
};

template <class _CharT>
locale::id messages<_CharT>::id;

template <class _CharT>
typename messages<_CharT>::catalog messages<_CharT>::do_open(const basic_string<char>& __nm, const locale&) const {
#  ifdef _LIBCPP_HAS_CATOPEN
  return (catalog)catopen(__nm.c_str(), NL_CAT_LOCALE);
#  else  // !_LIBCPP_HAS_CATOPEN
  (void)__nm;
  return -1;
#  endif // _LIBCPP_HAS_CATOPEN
}

template <class _CharT>
typename messages<_CharT>::string_type
messages<_CharT>::do_get(catalog __c, int __set, int __msgid, const string_type& __dflt) const {
#  ifdef _LIBCPP_HAS_CATOPEN
  string __ndflt;
  __narrow_to_utf8<sizeof(char_type) * __CHAR_BIT__>()(
      std::back_inserter(__ndflt), __dflt.c_str(), __dflt.c_str() + __dflt.size());
  nl_catd __cat = (nl_catd)__c;
  static_assert(sizeof(catalog) >= sizeof(nl_catd), "Unexpected nl_catd type");
  char* __n = catgets(__cat, __set, __msgid, __ndflt.c_str());
  string_type __w;
  __widen_from_utf8<sizeof(char_type) * __CHAR_BIT__>()(std::back_inserter(__w), __n, __n + std::strlen(__n));
  return __w;
#  else  // !_LIBCPP_HAS_CATOPEN
  (void)__c;
  (void)__set;
  (void)__msgid;
  return __dflt;
#  endif // _LIBCPP_HAS_CATOPEN
}

template <class _CharT>
void messages<_CharT>::do_close(catalog __c) const {
#  ifdef _LIBCPP_HAS_CATOPEN
  catclose((nl_catd)__c);
#  else  // !_LIBCPP_HAS_CATOPEN
  (void)__c;
#  endif // _LIBCPP_HAS_CATOPEN
}

extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS messages<char>;
#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS messages<wchar_t>;
#  endif

template <class _CharT>
class _LIBCPP_TEMPLATE_VIS messages_byname : public messages<_CharT> {
public:
  typedef messages_base::catalog catalog;
  typedef basic_string<_CharT> string_type;

  _LIBCPP_HIDE_FROM_ABI explicit messages_byname(const char*, size_t __refs = 0) : messages<_CharT>(__refs) {}

  _LIBCPP_HIDE_FROM_ABI explicit messages_byname(const string&, size_t __refs = 0) : messages<_CharT>(__refs) {}

protected:
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~messages_byname() override {}
};

extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS messages_byname<char>;
#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS messages_byname<wchar_t>;
#  endif

#  if _LIBCPP_STD_VER < 26 || defined(_LIBCPP_ENABLE_CXX26_REMOVED_WSTRING_CONVERT)

template <class _Codecvt,
          class _Elem      = wchar_t,
          class _WideAlloc = allocator<_Elem>,
          class _ByteAlloc = allocator<char> >
class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 wstring_convert {
public:
  typedef basic_string<char, char_traits<char>, _ByteAlloc> byte_string;
  typedef basic_string<_Elem, char_traits<_Elem>, _WideAlloc> wide_string;
  typedef typename _Codecvt::state_type state_type;
  typedef typename wide_string::traits_type::int_type int_type;

private:
  byte_string __byte_err_string_;
  wide_string __wide_err_string_;
  _Codecvt* __cvtptr_;
  state_type __cvtstate_;
  size_t __cvtcount_;

public:
#    ifndef _LIBCPP_CXX03_LANG
  _LIBCPP_HIDE_FROM_ABI wstring_convert() : wstring_convert(new _Codecvt) {}
  _LIBCPP_HIDE_FROM_ABI explicit wstring_convert(_Codecvt* __pcvt);
#    else
  _LIBCPP_HIDE_FROM_ABI _LIBCPP_EXPLICIT_SINCE_CXX14 wstring_convert(_Codecvt* __pcvt = new _Codecvt);
#    endif

  _LIBCPP_HIDE_FROM_ABI wstring_convert(_Codecvt* __pcvt, state_type __state);
  _LIBCPP_EXPLICIT_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI
  wstring_convert(const byte_string& __byte_err, const wide_string& __wide_err = wide_string());
#    ifndef _LIBCPP_CXX03_LANG
  _LIBCPP_HIDE_FROM_ABI wstring_convert(wstring_convert&& __wc);
#    endif
  _LIBCPP_HIDE_FROM_ABI ~wstring_convert();

  wstring_convert(const wstring_convert& __wc)            = delete;
  wstring_convert& operator=(const wstring_convert& __wc) = delete;

  _LIBCPP_HIDE_FROM_ABI wide_string from_bytes(char __byte) { return from_bytes(&__byte, &__byte + 1); }
  _LIBCPP_HIDE_FROM_ABI wide_string from_bytes(const char* __ptr) {
    return from_bytes(__ptr, __ptr + char_traits<char>::length(__ptr));
  }
  _LIBCPP_HIDE_FROM_ABI wide_string from_bytes(const byte_string& __str) {
    return from_bytes(__str.data(), __str.data() + __str.size());
  }
  _LIBCPP_HIDE_FROM_ABI wide_string from_bytes(const char* __first, const char* __last);

  _LIBCPP_HIDE_FROM_ABI byte_string to_bytes(_Elem __wchar) { return to_bytes(&__wchar, &__wchar + 1); }
  _LIBCPP_HIDE_FROM_ABI byte_string to_bytes(const _Elem* __wptr) {
    return to_bytes(__wptr, __wptr + char_traits<_Elem>::length(__wptr));
  }
  _LIBCPP_HIDE_FROM_ABI byte_string to_bytes(const wide_string& __wstr) {
    return to_bytes(__wstr.data(), __wstr.data() + __wstr.size());
  }
  _LIBCPP_HIDE_FROM_ABI byte_string to_bytes(const _Elem* __first, const _Elem* __last);

  _LIBCPP_HIDE_FROM_ABI size_t converted() const _NOEXCEPT { return __cvtcount_; }
  _LIBCPP_HIDE_FROM_ABI state_type state() const { return __cvtstate_; }
};

_LIBCPP_SUPPRESS_DEPRECATED_PUSH
template <class _Codecvt, class _Elem, class _WideAlloc, class _ByteAlloc>
inline wstring_convert<_Codecvt, _Elem, _WideAlloc, _ByteAlloc>::wstring_convert(_Codecvt* __pcvt)
    : __cvtptr_(__pcvt), __cvtstate_(), __cvtcount_(0) {}
_LIBCPP_SUPPRESS_DEPRECATED_POP

template <class _Codecvt, class _Elem, class _WideAlloc, class _ByteAlloc>
inline wstring_convert<_Codecvt, _Elem, _WideAlloc, _ByteAlloc>::wstring_convert(_Codecvt* __pcvt, state_type __state)
    : __cvtptr_(__pcvt), __cvtstate_(__state), __cvtcount_(0) {}

template <class _Codecvt, class _Elem, class _WideAlloc, class _ByteAlloc>
wstring_convert<_Codecvt, _Elem, _WideAlloc, _ByteAlloc>::wstring_convert(
    const byte_string& __byte_err, const wide_string& __wide_err)
    : __byte_err_string_(__byte_err), __wide_err_string_(__wide_err), __cvtstate_(), __cvtcount_(0) {
  __cvtptr_ = new _Codecvt;
}

#    ifndef _LIBCPP_CXX03_LANG

template <class _Codecvt, class _Elem, class _WideAlloc, class _ByteAlloc>
inline wstring_convert<_Codecvt, _Elem, _WideAlloc, _ByteAlloc>::wstring_convert(wstring_convert&& __wc)
    : __byte_err_string_(std::move(__wc.__byte_err_string_)),
      __wide_err_string_(std::move(__wc.__wide_err_string_)),
      __cvtptr_(__wc.__cvtptr_),
      __cvtstate_(__wc.__cvtstate_),
      __cvtcount_(__wc.__cvtcount_) {
  __wc.__cvtptr_ = nullptr;
}

#    endif // _LIBCPP_CXX03_LANG

_LIBCPP_SUPPRESS_DEPRECATED_PUSH
template <class _Codecvt, class _Elem, class _WideAlloc, class _ByteAlloc>
wstring_convert<_Codecvt, _Elem, _WideAlloc, _ByteAlloc>::~wstring_convert() {
  delete __cvtptr_;
}

template <class _Codecvt, class _Elem, class _WideAlloc, class _ByteAlloc>
typename wstring_convert<_Codecvt, _Elem, _WideAlloc, _ByteAlloc>::wide_string
wstring_convert<_Codecvt, _Elem, _WideAlloc, _ByteAlloc>::from_bytes(const char* __frm, const char* __frm_end) {
  _LIBCPP_SUPPRESS_DEPRECATED_POP
  __cvtcount_ = 0;
  if (__cvtptr_ != nullptr) {
    wide_string __ws(2 * (__frm_end - __frm), _Elem());
    if (__frm != __frm_end)
      __ws.resize(__ws.capacity());
    codecvt_base::result __r = codecvt_base::ok;
    state_type __st          = __cvtstate_;
    if (__frm != __frm_end) {
      _Elem* __to     = &__ws[0];
      _Elem* __to_end = __to + __ws.size();
      const char* __frm_nxt;
      do {
        _Elem* __to_nxt;
        __r = __cvtptr_->in(__st, __frm, __frm_end, __frm_nxt, __to, __to_end, __to_nxt);
        __cvtcount_ += __frm_nxt - __frm;
        if (__frm_nxt == __frm) {
          __r = codecvt_base::error;
        } else if (__r == codecvt_base::noconv) {
          __ws.resize(__to - &__ws[0]);
          // This only gets executed if _Elem is char
          __ws.append((const _Elem*)__frm, (const _Elem*)__frm_end);
          __frm = __frm_nxt;
          __r   = codecvt_base::ok;
        } else if (__r == codecvt_base::ok) {
          __ws.resize(__to_nxt - &__ws[0]);
          __frm = __frm_nxt;
        } else if (__r == codecvt_base::partial) {
          ptrdiff_t __s = __to_nxt - &__ws[0];
          __ws.resize(2 * __s);
          __to     = &__ws[0] + __s;
          __to_end = &__ws[0] + __ws.size();
          __frm    = __frm_nxt;
        }
      } while (__r == codecvt_base::partial && __frm_nxt < __frm_end);
    }
    if (__r == codecvt_base::ok)
      return __ws;
  }

  if (__wide_err_string_.empty())
    __throw_range_error("wstring_convert: from_bytes error");

  return __wide_err_string_;
}

template <class _Codecvt, class _Elem, class _WideAlloc, class _ByteAlloc>
typename wstring_convert<_Codecvt, _Elem, _WideAlloc, _ByteAlloc>::byte_string
wstring_convert<_Codecvt, _Elem, _WideAlloc, _ByteAlloc>::to_bytes(const _Elem* __frm, const _Elem* __frm_end) {
  __cvtcount_ = 0;
  if (__cvtptr_ != nullptr) {
    byte_string __bs(2 * (__frm_end - __frm), char());
    if (__frm != __frm_end)
      __bs.resize(__bs.capacity());
    codecvt_base::result __r = codecvt_base::ok;
    state_type __st          = __cvtstate_;
    if (__frm != __frm_end) {
      char* __to     = &__bs[0];
      char* __to_end = __to + __bs.size();
      const _Elem* __frm_nxt;
      do {
        char* __to_nxt;
        __r = __cvtptr_->out(__st, __frm, __frm_end, __frm_nxt, __to, __to_end, __to_nxt);
        __cvtcount_ += __frm_nxt - __frm;
        if (__frm_nxt == __frm) {
          __r = codecvt_base::error;
        } else if (__r == codecvt_base::noconv) {
          __bs.resize(__to - &__bs[0]);
          // This only gets executed if _Elem is char
          __bs.append((const char*)__frm, (const char*)__frm_end);
          __frm = __frm_nxt;
          __r   = codecvt_base::ok;
        } else if (__r == codecvt_base::ok) {
          __bs.resize(__to_nxt - &__bs[0]);
          __frm = __frm_nxt;
        } else if (__r == codecvt_base::partial) {
          ptrdiff_t __s = __to_nxt - &__bs[0];
          __bs.resize(2 * __s);
          __to     = &__bs[0] + __s;
          __to_end = &__bs[0] + __bs.size();
          __frm    = __frm_nxt;
        }
      } while (__r == codecvt_base::partial && __frm_nxt < __frm_end);
    }
    if (__r == codecvt_base::ok) {
      size_t __s = __bs.size();
      __bs.resize(__bs.capacity());
      char* __to     = &__bs[0] + __s;
      char* __to_end = __to + __bs.size();
      do {
        char* __to_nxt;
        __r = __cvtptr_->unshift(__st, __to, __to_end, __to_nxt);
        if (__r == codecvt_base::noconv) {
          __bs.resize(__to - &__bs[0]);
          __r = codecvt_base::ok;
        } else if (__r == codecvt_base::ok) {
          __bs.resize(__to_nxt - &__bs[0]);
        } else if (__r == codecvt_base::partial) {
          ptrdiff_t __sp = __to_nxt - &__bs[0];
          __bs.resize(2 * __sp);
          __to     = &__bs[0] + __sp;
          __to_end = &__bs[0] + __bs.size();
        }
      } while (__r == codecvt_base::partial);
      if (__r == codecvt_base::ok)
        return __bs;
    }
  }

  if (__byte_err_string_.empty())
    __throw_range_error("wstring_convert: to_bytes error");

  return __byte_err_string_;
}

template <class _Codecvt, class _Elem = wchar_t, class _Tr = char_traits<_Elem> >
class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 wbuffer_convert : public basic_streambuf<_Elem, _Tr> {
public:
  // types:
  typedef _Elem char_type;
  typedef _Tr 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;
  typedef typename _Codecvt::state_type state_type;

private:
  char* __extbuf_;
  const char* __extbufnext_;
  const char* __extbufend_;
  char __extbuf_min_[8];
  size_t __ebs_;
  char_type* __intbuf_;
  size_t __ibs_;
  streambuf* __bufptr_;
  _Codecvt* __cv_;
  state_type __st_;
  ios_base::openmode __cm_;
  bool __owns_eb_;
  bool __owns_ib_;
  bool __always_noconv_;

public:
#    ifndef _LIBCPP_CXX03_LANG
  _LIBCPP_HIDE_FROM_ABI wbuffer_convert() : wbuffer_convert(nullptr) {}
  explicit _LIBCPP_HIDE_FROM_ABI
  wbuffer_convert(streambuf* __bytebuf, _Codecvt* __pcvt = new _Codecvt, state_type __state = state_type());
#    else
  _LIBCPP_EXPLICIT_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI
  wbuffer_convert(streambuf* __bytebuf = nullptr, _Codecvt* __pcvt = new _Codecvt, state_type __state = state_type());
#    endif

  _LIBCPP_HIDE_FROM_ABI ~wbuffer_convert();

  _LIBCPP_HIDE_FROM_ABI streambuf* rdbuf() const { return __bufptr_; }
  _LIBCPP_HIDE_FROM_ABI streambuf* rdbuf(streambuf* __bytebuf) {
    streambuf* __r = __bufptr_;
    __bufptr_      = __bytebuf;
    return __r;
  }

  wbuffer_convert(const wbuffer_convert&)            = delete;
  wbuffer_convert& operator=(const wbuffer_convert&) = delete;

  _LIBCPP_HIDE_FROM_ABI state_type state() const { return __st_; }

protected:
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL virtual int_type underflow();
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL virtual int_type pbackfail(int_type __c = traits_type::eof());
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL virtual int_type overflow(int_type __c = traits_type::eof());
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL virtual basic_streambuf<char_type, traits_type>* setbuf(char_type* __s, streamsize __n);
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL virtual pos_type
  seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode __wch = ios_base::in | ios_base::out);
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL virtual pos_type
  seekpos(pos_type __sp, ios_base::openmode __wch = ios_base::in | ios_base::out);
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL virtual int sync();

private:
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL bool __read_mode();
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL void __write_mode();
  _LIBCPP_HIDE_FROM_ABI_VIRTUAL wbuffer_convert* __close();
};

_LIBCPP_SUPPRESS_DEPRECATED_PUSH
template <class _Codecvt, class _Elem, class _Tr>
wbuffer_convert<_Codecvt, _Elem, _Tr>::wbuffer_convert(streambuf* __bytebuf, _Codecvt* __pcvt, state_type __state)
    : __extbuf_(nullptr),
      __extbufnext_(nullptr),
      __extbufend_(nullptr),
      __ebs_(0),
      __intbuf_(0),
      __ibs_(0),
      __bufptr_(__bytebuf),
      __cv_(__pcvt),
      __st_(__state),
      __cm_(0),
      __owns_eb_(false),
      __owns_ib_(false),
      __always_noconv_(__cv_ ? __cv_->always_noconv() : false) {
  setbuf(0, 4096);
}

template <class _Codecvt, class _Elem, class _Tr>
wbuffer_convert<_Codecvt, _Elem, _Tr>::~wbuffer_convert() {
  __close();
  delete __cv_;
  if (__owns_eb_)
    delete[] __extbuf_;
  if (__owns_ib_)
    delete[] __intbuf_;
}

template <class _Codecvt, class _Elem, class _Tr>
typename wbuffer_convert<_Codecvt, _Elem, _Tr>::int_type wbuffer_convert<_Codecvt, _Elem, _Tr>::underflow() {
  _LIBCPP_SUPPRESS_DEPRECATED_POP
  if (__cv_ == 0 || __bufptr_ == nullptr)
    return traits_type::eof();
  bool __initial = __read_mode();
  char_type __1buf;
  if (this->gptr() == 0)
    this->setg(&__1buf, &__1buf + 1, &__1buf + 1);
  const size_t __unget_sz = __initial ? 0 : std::min<size_t>((this->egptr() - this->eback()) / 2, 4);
  int_type __c            = traits_type::eof();
  if (this->gptr() == this->egptr()) {
    std::memmove(this->eback(), this->egptr() - __unget_sz, __unget_sz * sizeof(char_type));
    if (__always_noconv_) {
      streamsize __nmemb = static_cast<streamsize>(this->egptr() - this->eback() - __unget_sz);
      __nmemb            = __bufptr_->sgetn((char*)this->eback() + __unget_sz, __nmemb);
      if (__nmemb != 0) {
        this->setg(this->eback(), this->eback() + __unget_sz, this->eback() + __unget_sz + __nmemb);
        __c = *this->gptr();
      }
    } else {
      if (__extbufend_ != __extbufnext_) {
        _LIBCPP_ASSERT_NON_NULL(__extbufnext_ != nullptr, "underflow moving from nullptr");
        _LIBCPP_ASSERT_NON_NULL(__extbuf_ != nullptr, "underflow moving into nullptr");
        std::memmove(__extbuf_, __extbufnext_, __extbufend_ - __extbufnext_);
      }
      __extbufnext_      = __extbuf_ + (__extbufend_ - __extbufnext_);
      __extbufend_       = __extbuf_ + (__extbuf_ == __extbuf_min_ ? sizeof(__extbuf_min_) : __ebs_);
      streamsize __nmemb = std::min(static_cast<streamsize>(this->egptr() - this->eback() - __unget_sz),
                                    static_cast<streamsize>(__extbufend_ - __extbufnext_));
      codecvt_base::result __r;
      // FIXME: Do we ever need to restore the state here?
      // state_type __svs = __st_;
      streamsize __nr = __bufptr_->sgetn(const_cast<char*>(__extbufnext_), __nmemb);
      if (__nr != 0) {
        __extbufend_ = __extbufnext_ + __nr;
        char_type* __inext;
        __r = __cv_->in(
            __st_, __extbuf_, __extbufend_, __extbufnext_, this->eback() + __unget_sz, this->egptr(), __inext);
        if (__r == codecvt_base::noconv) {
          this->setg((char_type*)__extbuf_, (char_type*)__extbuf_, (char_type*)const_cast<char*>(__extbufend_));
          __c = *this->gptr();
        } else if (__inext != this->eback() + __unget_sz) {
          this->setg(this->eback(), this->eback() + __unget_sz, __inext);
          __c = *this->gptr();
        }
      }
    }
  } else
    __c = *this->gptr();
  if (this->eback() == &__1buf)
    this->setg(0, 0, 0);
  return __c;
}

_LIBCPP_SUPPRESS_DEPRECATED_PUSH
template <class _Codecvt, class _Elem, class _Tr>
typename wbuffer_convert<_Codecvt, _Elem, _Tr>::int_type
wbuffer_convert<_Codecvt, _Elem, _Tr>::pbackfail(int_type __c) {
  _LIBCPP_SUPPRESS_DEPRECATED_POP
  if (__cv_ != 0 && __bufptr_ && this->eback() < this->gptr()) {
    if (traits_type::eq_int_type(__c, traits_type::eof())) {
      this->gbump(-1);
      return traits_type::not_eof(__c);
    }
    if (traits_type::eq(traits_type::to_char_type(__c), this->gptr()[-1])) {
      this->gbump(-1);
      *this->gptr() = traits_type::to_char_type(__c);
      return __c;
    }
  }
  return traits_type::eof();
}

_LIBCPP_SUPPRESS_DEPRECATED_PUSH
template <class _Codecvt, class _Elem, class _Tr>
typename wbuffer_convert<_Codecvt, _Elem, _Tr>::int_type wbuffer_convert<_Codecvt, _Elem, _Tr>::overflow(int_type __c) {
  _LIBCPP_SUPPRESS_DEPRECATED_POP
  if (__cv_ == 0 || !__bufptr_)
    return traits_type::eof();
  __write_mode();
  char_type __1buf;
  char_type* __pb_save  = this->pbase();
  char_type* __epb_save = this->epptr();
  if (!traits_type::eq_int_type(__c, traits_type::eof())) {
    if (this->pptr() == 0)
      this->setp(&__1buf, &__1buf + 1);
    *this->pptr() = traits_type::to_char_type(__c);
    this->pbump(1);
  }
  if (this->pptr() != this->pbase()) {
    if (__always_noconv_) {
      streamsize __nmemb = static_cast<streamsize>(this->pptr() - this->pbase());
      if (__bufptr_->sputn((const char*)this->pbase(), __nmemb) != __nmemb)
        return traits_type::eof();
    } else {
      char* __extbe = __extbuf_;
      codecvt_base::result __r;
      do {
        const char_type* __e;
        __r = __cv_->out(__st_, this->pbase(), this->pptr(), __e, __extbuf_, __extbuf_ + __ebs_, __extbe);
        if (__e == this->pbase())
          return traits_type::eof();
        if (__r == codecvt_base::noconv) {
          streamsize __nmemb = static_cast<size_t>(this->pptr() - this->pbase());
          if (__bufptr_->sputn((const char*)this->pbase(), __nmemb) != __nmemb)
            return traits_type::eof();
        } else if (__r == codecvt_base::ok || __r == codecvt_base::partial) {
          streamsize __nmemb = static_cast<size_t>(__extbe - __extbuf_);
          if (__bufptr_->sputn(__extbuf_, __nmemb) != __nmemb)
            return traits_type::eof();
          if (__r == codecvt_base::partial) {
            this->setp(const_cast<char_type*>(__e), this->pptr());
            this->__pbump(this->epptr() - this->pbase());
          }
        } else
          return traits_type::eof();
      } while (__r == codecvt_base::partial);
    }
    this->setp(__pb_save, __epb_save);
  }
  return traits_type::not_eof(__c);
}

_LIBCPP_SUPPRESS_DEPRECATED_PUSH
template <class _Codecvt, class _Elem, class _Tr>
basic_streambuf<_Elem, _Tr>* wbuffer_convert<_Codecvt, _Elem, _Tr>::setbuf(char_type* __s, streamsize __n) {
  _LIBCPP_SUPPRESS_DEPRECATED_POP
  this->setg(0, 0, 0);
  this->setp(0, 0);
  if (__owns_eb_)
    delete[] __extbuf_;
  if (__owns_ib_)
    delete[] __intbuf_;
  __ebs_ = __n;
  if (__ebs_ > sizeof(__extbuf_min_)) {
    if (__always_noconv_ && __s) {
      __extbuf_  = (char*)__s;
      __owns_eb_ = false;
    } else {
      __extbuf_  = new char[__ebs_];
      __owns_eb_ = true;
    }
  } else {
    __extbuf_  = __extbuf_min_;
    __ebs_     = sizeof(__extbuf_min_);
    __owns_eb_ = false;
  }
  if (!__always_noconv_) {
    __ibs_ = max<streamsize>(__n, sizeof(__extbuf_min_));
    if (__s && __ibs_ >= sizeof(__extbuf_min_)) {
      __intbuf_  = __s;
      __owns_ib_ = false;
    } else {
      __intbuf_  = new char_type[__ibs_];
      __owns_ib_ = true;
    }
  } else {
    __ibs_     = 0;
    __intbuf_  = 0;
    __owns_ib_ = false;
  }
  return this;
}

_LIBCPP_SUPPRESS_DEPRECATED_PUSH
template <class _Codecvt, class _Elem, class _Tr>
typename wbuffer_convert<_Codecvt, _Elem, _Tr>::pos_type
wbuffer_convert<_Codecvt, _Elem, _Tr>::seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode __om) {
  int __width = __cv_->encoding();
  if (__cv_ == 0 || !__bufptr_ || (__width <= 0 && __off != 0) || sync())
    return pos_type(off_type(-1));
  // __width > 0 || __off == 0, now check __way
  if (__way != ios_base::beg && __way != ios_base::cur && __way != ios_base::end)
    return pos_type(off_type(-1));
  pos_type __r = __bufptr_->pubseekoff(__width * __off, __way, __om);
  __r.state(__st_);
  return __r;
}

template <class _Codecvt, class _Elem, class _Tr>
typename wbuffer_convert<_Codecvt, _Elem, _Tr>::pos_type
wbuffer_convert<_Codecvt, _Elem, _Tr>::seekpos(pos_type __sp, ios_base::openmode __wch) {
  if (__cv_ == 0 || !__bufptr_ || sync())
    return pos_type(off_type(-1));
  if (__bufptr_->pubseekpos(__sp, __wch) == pos_type(off_type(-1)))
    return pos_type(off_type(-1));
  return __sp;
}

template <class _Codecvt, class _Elem, class _Tr>
int wbuffer_convert<_Codecvt, _Elem, _Tr>::sync() {
  _LIBCPP_SUPPRESS_DEPRECATED_POP
  if (__cv_ == 0 || !__bufptr_)
    return 0;
  if (__cm_ & ios_base::out) {
    if (this->pptr() != this->pbase())
      if (overflow() == traits_type::eof())
        return -1;
    codecvt_base::result __r;
    do {
      char* __extbe;
      __r                = __cv_->unshift(__st_, __extbuf_, __extbuf_ + __ebs_, __extbe);
      streamsize __nmemb = static_cast<streamsize>(__extbe - __extbuf_);
      if (__bufptr_->sputn(__extbuf_, __nmemb) != __nmemb)
        return -1;
    } while (__r == codecvt_base::partial);
    if (__r == codecvt_base::error)
      return -1;
    if (__bufptr_->pubsync())
      return -1;
  } else if (__cm_ & ios_base::in) {
    off_type __c;
    if (__always_noconv_)
      __c = this->egptr() - this->gptr();
    else {
      int __width = __cv_->encoding();
      __c         = __extbufend_ - __extbufnext_;
      if (__width > 0)
        __c += __width * (this->egptr() - this->gptr());
      else {
        if (this->gptr() != this->egptr()) {
          std::reverse(this->gptr(), this->egptr());
          codecvt_base::result __r;
          const char_type* __e = this->gptr();
          char* __extbe;
          do {
            __r = __cv_->out(__st_, __e, this->egptr(), __e, __extbuf_, __extbuf_ + __ebs_, __extbe);
            switch (__r) {
            case codecvt_base::noconv:
              __c += this->egptr() - this->gptr();
              break;
            case codecvt_base::ok:
            case codecvt_base::partial:
              __c += __extbe - __extbuf_;
              break;
            default:
              return -1;
            }
          } while (__r == codecvt_base::partial);
        }
      }
    }
    if (__bufptr_->pubseekoff(-__c, ios_base::cur, __cm_) == pos_type(off_type(-1)))
      return -1;
    this->setg(0, 0, 0);
    __cm_ = 0;
  }
  return 0;
}

_LIBCPP_SUPPRESS_DEPRECATED_PUSH
template <class _Codecvt, class _Elem, class _Tr>
bool wbuffer_convert<_Codecvt, _Elem, _Tr>::__read_mode() {
  if (!(__cm_ & ios_base::in)) {
    this->setp(0, 0);
    if (__always_noconv_)
      this->setg((char_type*)__extbuf_, (char_type*)__extbuf_ + __ebs_, (char_type*)__extbuf_ + __ebs_);
    else
      this->setg(__intbuf_, __intbuf_ + __ibs_, __intbuf_ + __ibs_);
    __cm_ = ios_base::in;
    return true;
  }
  return false;
}

template <class _Codecvt, class _Elem, class _Tr>
void wbuffer_convert<_Codecvt, _Elem, _Tr>::__write_mode() {
  if (!(__cm_ & ios_base::out)) {
    this->setg(0, 0, 0);
    if (__ebs_ > sizeof(__extbuf_min_)) {
      if (__always_noconv_)
        this->setp((char_type*)__extbuf_, (char_type*)__extbuf_ + (__ebs_ - 1));
      else
        this->setp(__intbuf_, __intbuf_ + (__ibs_ - 1));
    } else
      this->setp(0, 0);
    __cm_ = ios_base::out;
  }
}

template <class _Codecvt, class _Elem, class _Tr>
wbuffer_convert<_Codecvt, _Elem, _Tr>* wbuffer_convert<_Codecvt, _Elem, _Tr>::__close() {
  wbuffer_convert* __rt = nullptr;
  if (__cv_ != nullptr && __bufptr_ != nullptr) {
    __rt = this;
    if ((__cm_ & ios_base::out) && sync())
      __rt = nullptr;
  }
  return __rt;
}

_LIBCPP_SUPPRESS_DEPRECATED_POP

#  endif // _LIBCPP_STD_VER < 26 || defined(_LIBCPP_ENABLE_CXX26_REMOVED_WSTRING_CONVERT)

_LIBCPP_END_NAMESPACE_STD

_LIBCPP_POP_MACROS

// NOLINTEND(libcpp-robust-against-adl)

#endif // !defined(_LIBCPP_HAS_NO_LOCALIZATION)

#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
#  include <atomic>
#  include <concepts>
#  include <cstdarg>
#  include <iterator>
#  include <mutex>
#  include <stdexcept>
#  include <type_traits>
#  include <typeinfo>
#endif

#endif // _LIBCPP_LOCALE