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Warning, /include/c++/v1/sstream is written in an unsupported language. File is not indexed.

0001 // -*- C++ -*-
0002 //===----------------------------------------------------------------------===//
0003 //
0004 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0005 // See https://llvm.org/LICENSE.txt for license information.
0006 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0007 //
0008 //===----------------------------------------------------------------------===//
0009 
0010 #ifndef _LIBCPP_SSTREAM
0011 #define _LIBCPP_SSTREAM
0012 
0013 // clang-format off
0014 
0015 /*
0016     sstream synopsis [sstream.syn]
0017 
0018 // Class template basic_stringbuf [stringbuf]
0019 template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
0020 class basic_stringbuf
0021     : public basic_streambuf<charT, traits>
0022 {
0023 public:
0024     typedef charT                          char_type;
0025     typedef traits                         traits_type;
0026     typedef typename traits_type::int_type int_type;
0027     typedef typename traits_type::pos_type pos_type;
0028     typedef typename traits_type::off_type off_type;
0029     typedef Allocator                      allocator_type;
0030 
0031     // [stringbuf.cons] constructors:
0032     explicit basic_stringbuf(ios_base::openmode which = ios_base::in | ios_base::out); // before C++20
0033     basic_stringbuf() : basic_stringbuf(ios_base::in | ios_base::out) {}               // C++20
0034     explicit basic_stringbuf(ios_base::openmode which);                                // C++20
0035     explicit basic_stringbuf(const basic_string<char_type, traits_type, allocator_type>& s,
0036                              ios_base::openmode which = ios_base::in | ios_base::out);
0037     explicit basic_stringbuf(const allocator_type& a)
0038         : basic_stringbuf(ios_base::in | ios_base::out, a) {}                          // C++20
0039     basic_stringbuf(ios_base::openmode which, const allocator_type& a);                // C++20
0040     explicit basic_stringbuf(basic_string<char_type, traits_type, allocator_type>&& s,
0041                              ios_base::openmode which = ios_base::in | ios_base::out); // C++20
0042     template <class SAlloc>
0043     basic_stringbuf(const basic_string<char_type, traits_type, SAlloc>& s, const allocator_type& a)
0044         : basic_stringbuf(s, ios_base::in | ios_base::out, a) {}                       // C++20
0045     template <class SAlloc>
0046     basic_stringbuf(const basic_string<char_type, traits_type, SAlloc>& s,
0047                     ios_base::openmode which, const allocator_type& a);                // C++20
0048     template <class SAlloc>
0049     explicit basic_stringbuf(const basic_string<char_type, traits_type, SAlloc>& s,
0050                              ios_base::openmode which = ios_base::in | ios_base::out); // C++20
0051     template<class T>
0052       explicit basic_stringbuf(const T& t,
0053                                ios_base::openmode which = ios_base::in | ios_base::out); // Since C++26
0054     template<class T>
0055       basic_stringbuf(const T& t, const Allocator& a);                                   // Since C++26
0056     template<class T>
0057       basic_stringbuf(const T& t, ios_base::openmode which, const Allocator& a);         // Since C++26
0058     basic_stringbuf(const basic_stringbuf&) = delete;
0059     basic_stringbuf(basic_stringbuf&& rhs);
0060     basic_stringbuf(basic_stringbuf&& rhs, const allocator_type& a);                   // C++20
0061 
0062     // [stringbuf.assign] Assign and swap:
0063     basic_stringbuf& operator=(const basic_stringbuf&) = delete;
0064     basic_stringbuf& operator=(basic_stringbuf&& rhs);
0065     void swap(basic_stringbuf& rhs) noexcept(see below);                               // conditionally noexcept since C++20
0066 
0067     // [stringbuf.members] Member functions:
0068     allocator_type get_allocator() const noexcept;                                     // C++20
0069     basic_string<char_type, traits_type, allocator_type> str() const;                  // before C++20
0070     basic_string<char_type, traits_type, allocator_type> str() const &;                // C++20
0071     template <class SAlloc>
0072     basic_string<char_type, traits_type, SAlloc> str(const SAlloc& sa) const;          // C++20
0073     basic_string<char_type, traits_type, allocator_type> str() &&;                     // C++20
0074     basic_string_view<char_type, traits_type> view() const noexcept;                   // C++20
0075     void str(const basic_string<char_type, traits_type, allocator_type>& s);
0076     template <class SAlloc>
0077     void str(const basic_string<char_type, traits_type, SAlloc>& s);                   // C++20
0078     void str(basic_string<char_type, traits_type, allocator_type>&& s);                // C++20
0079     template<class T>
0080       void str(const T& t);                                                            // Since C++26
0081 
0082 protected:
0083     // [stringbuf.virtuals] Overridden virtual functions:
0084     virtual int_type underflow();
0085     virtual int_type pbackfail(int_type c = traits_type::eof());
0086     virtual int_type overflow (int_type c = traits_type::eof());
0087     virtual basic_streambuf<char_type, traits_type>* setbuf(char_type*, streamsize);
0088     virtual pos_type seekoff(off_type off, ios_base::seekdir way,
0089                              ios_base::openmode which = ios_base::in | ios_base::out);
0090     virtual pos_type seekpos(pos_type sp,
0091                              ios_base::openmode which = ios_base::in | ios_base::out);
0092 };
0093 
0094 // [stringbuf.assign] non member swap
0095 template <class charT, class traits, class Allocator>
0096 void swap(basic_stringbuf<charT, traits, Allocator>& x,
0097           basic_stringbuf<charT, traits, Allocator>& y); // conditionally noexcept since C++20
0098 
0099 typedef basic_stringbuf<char>    stringbuf;
0100 typedef basic_stringbuf<wchar_t> wstringbuf;
0101 
0102 // Class template basic_istringstream [istringstream]
0103 template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
0104 class basic_istringstream
0105     : public basic_istream<charT, traits>
0106 {
0107 public:
0108     typedef charT                          char_type;
0109     typedef traits                         traits_type;
0110     typedef typename traits_type::int_type int_type;
0111     typedef typename traits_type::pos_type pos_type;
0112     typedef typename traits_type::off_type off_type;
0113     typedef Allocator                      allocator_type;
0114 
0115     // [istringstream.cons] Constructors:
0116     explicit basic_istringstream(ios_base::openmode which = ios_base::in);             // before C++20
0117     basic_istringstream() : basic_istringstream(ios_base::in) {}                       // C++20
0118     explicit basic_istringstream(ios_base::openmode which);                            // C++20
0119     explicit basic_istringstream(const basic_string<char_type, traits_type, allocator_type>& s,
0120                                  ios_base::openmode which = ios_base::in);
0121     basic_istringstream(ios_base::openmode which, const allocator_type& a);            // C++20
0122     explicit basic_istringstream(basic_string<char_type, traits_type, allocator_type>&& s,
0123                                  ios_base::openmode which = ios_base::in);             // C++20
0124     template <class SAlloc>
0125     basic_istringstream(const basic_string<char_type, traits_type, SAlloc>& s, const allocator_type& a)
0126         : basic_istringstream(s, ios_base::in, a) {}                                   // C++20
0127     template <class SAlloc>
0128     basic_istringstream(const basic_string<char_type, traits_type, SAlloc>& s,
0129                         ios_base::openmode which, const allocator_type& a);            // C++20
0130     template <class SAlloc>
0131     explicit basic_istringstream(const basic_string<char_type, traits_type, SAlloc>& s,
0132                                  ios_base::openmode which = ios_base::in);             // C++20
0133     template<class T>
0134       explicit basic_istringstream(const T& t, ios_base::openmode which = ios_base::in); // Since C++26
0135     template<class T>
0136       basic_istringstream(const T& t, const Allocator& a);                               // Since C++26
0137     template<class T>
0138       basic_istringstream(const T& t, ios_base::openmode which, const Allocator& a);     // Since C++26
0139     basic_istringstream(const basic_istringstream&) = delete;
0140     basic_istringstream(basic_istringstream&& rhs);
0141 
0142     // [istringstream.assign] Assign and swap:
0143     basic_istringstream& operator=(const basic_istringstream&) = delete;
0144     basic_istringstream& operator=(basic_istringstream&& rhs);
0145     void swap(basic_istringstream& rhs);
0146 
0147     // [istringstream.members] Member functions:
0148     basic_stringbuf<char_type, traits_type, allocator_type>* rdbuf() const;
0149     basic_string<char_type, traits_type, allocator_type> str() const;                  // before C++20
0150     basic_string<char_type, traits_type, allocator_type> str() const &;                // C++20
0151     template <class SAlloc>
0152     basic_string<char_type, traits_type, SAlloc> str(const SAlloc& sa) const;          // C++20
0153     basic_string<char_type, traits_type, allocator_type> str() &&;                     // C++20
0154     basic_string_view<char_type, traits_type> view() const noexcept;                   // C++20
0155     void str(const basic_string<char_type, traits_type, allocator_type>& s);
0156     template <class SAlloc>
0157     void str(const basic_string<char_type, traits_type, SAlloc>& s);                   // C++20
0158     void str(basic_string<char_type, traits_type, allocator_type>&& s);                // C++20
0159     template<class T>
0160       void str(const T& t);                                                            // Since C++26
0161 };
0162 
0163 template <class charT, class traits, class Allocator>
0164 void swap(basic_istringstream<charT, traits, Allocator>& x,
0165           basic_istringstream<charT, traits, Allocator>& y);
0166 
0167 typedef basic_istringstream<char>    istringstream;
0168 typedef basic_istringstream<wchar_t> wistringstream;
0169 
0170 // Class template basic_ostringstream [ostringstream]
0171 template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
0172 class basic_ostringstream
0173     : public basic_ostream<charT, traits>
0174 {
0175 public:
0176     // types:
0177     typedef charT                          char_type;
0178     typedef traits                         traits_type;
0179     typedef typename traits_type::int_type int_type;
0180     typedef typename traits_type::pos_type pos_type;
0181     typedef typename traits_type::off_type off_type;
0182     typedef Allocator                      allocator_type;
0183 
0184     // [ostringstream.cons] Constructors:
0185     explicit basic_ostringstream(ios_base::openmode which = ios_base::out);            // before C++20
0186     basic_ostringstream() : basic_ostringstream(ios_base::out) {}                      // C++20
0187     explicit basic_ostringstream(ios_base::openmode which);                            // C++20
0188     explicit basic_ostringstream(const basic_string<char_type, traits_type, allocator_type>& s,
0189                                  ios_base::openmode which = ios_base::out);
0190     basic_ostringstream(ios_base::openmode which, const allocator_type& a);            // C++20
0191     explicit basic_ostringstream(basic_string<char_type, traits_type, allocator_type>&& s,
0192                                  ios_base::openmode which = ios_base::out);            // C++20
0193     template <class SAlloc>
0194     basic_ostringstream(const basic_string<char_type, traits_type, SAlloc>& s, const allocator_type& a)
0195         : basic_ostringstream(s, ios_base::out, a) {}                                  // C++20
0196     template <class SAlloc>
0197     basic_ostringstream(const basic_string<char_type, traits_type, SAlloc>& s,
0198                         ios_base::openmode which, const allocator_type& a);            // C++20
0199     template <class SAlloc>
0200     explicit basic_ostringstream(const basic_string<char_type, traits_type, SAlloc>& s,
0201                                  ios_base::openmode which = ios_base::out);            // C++20
0202     template<class T>
0203       explicit basic_ostringstream(const T& t, ios_base::openmode which = ios_base::out); // Since C++26
0204     template<class T>
0205       basic_ostringstream(const T& t, const Allocator& a);                                // Since C++26
0206     template<class T>
0207       basic_ostringstream(const T& t, ios_base::openmode which, const Allocator& a);      // Since C++26
0208     basic_ostringstream(const basic_ostringstream&) = delete;
0209     basic_ostringstream(basic_ostringstream&& rhs);
0210 
0211     // [ostringstream.assign] Assign and swap:
0212     basic_ostringstream& operator=(const basic_ostringstream&) = delete;
0213     basic_ostringstream& operator=(basic_ostringstream&& rhs);
0214     void swap(basic_ostringstream& rhs);
0215 
0216     // [ostringstream.members] Member functions:
0217     basic_stringbuf<char_type, traits_type, allocator_type>* rdbuf() const;
0218     basic_string<char_type, traits_type, allocator_type> str() const;                  // before C++20
0219     basic_string<char_type, traits_type, allocator_type> str() const &;                // C++20
0220     template <class SAlloc>
0221     basic_string<char_type, traits_type, SAlloc> str(const SAlloc& sa) const;          // C++20
0222     basic_string<char_type, traits_type, allocator_type> str() &&;                     // C++20
0223     basic_string_view<char_type, traits_type> view() const noexcept;                   // C++20
0224     void str(const basic_string<char_type, traits_type, allocator_type>& s);
0225     template <class SAlloc>
0226     void str(const basic_string<char_type, traits_type, SAlloc>& s);                   // C++20
0227     void str(basic_string<char_type, traits_type, allocator_type>&& s);                // C++20
0228     template<class T>
0229       void str(const T& t);                                                            // Since C++26
0230 };
0231 
0232 template <class charT, class traits, class Allocator>
0233 void swap(basic_ostringstream<charT, traits, Allocator>& x,
0234           basic_ostringstream<charT, traits, Allocator>& y);
0235 
0236 typedef basic_ostringstream<char>    ostringstream;
0237 typedef basic_ostringstream<wchar_t> wostringstream;
0238 
0239 // Class template basic_stringstream [stringstream]
0240 template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
0241 class basic_stringstream
0242     : public basic_iostream<charT, traits>
0243 {
0244 public:
0245     // types:
0246     typedef charT                          char_type;
0247     typedef traits                         traits_type;
0248     typedef typename traits_type::int_type int_type;
0249     typedef typename traits_type::pos_type pos_type;
0250     typedef typename traits_type::off_type off_type;
0251     typedef Allocator                      allocator_type;
0252 
0253     // [stringstream.cons] constructors
0254     explicit basic_stringstream(ios_base::openmode which = ios_base::out | ios_base::in); // before C++20
0255     basic_stringstream() : basic_stringstream(ios_base::out | ios_base::in) {}            // C++20
0256     explicit basic_stringstream(ios_base::openmode which);                                // C++20
0257     explicit basic_stringstream(const basic_string<char_type, traits_type, allocator_type>& s,
0258                                 ios_base::openmode which = ios_base::out | ios_base::in);
0259     basic_stringstream(ios_base::openmode which, const allocator_type& a);                // C++20
0260     explicit basic_stringstream(basic_string<char_type, traits_type, allocator_type>&& s,
0261                                 ios_base::openmode which = ios_base::out | ios_base::in); // C++20
0262     template <class SAlloc>
0263     basic_stringstream(const basic_string<char_type, traits_type, SAlloc>& s, const allocator_type& a)
0264         : basic_stringstream(s, ios_base::out | ios_base::in, a) {}                       // C++20
0265     template <class SAlloc>
0266     basic_stringstream(const basic_string<char_type, traits_type, SAlloc>& s,
0267                        ios_base::openmode which, const allocator_type& a);                // C++20
0268     template <class SAlloc>
0269     explicit basic_stringstream(const basic_string<char_type, traits_type, SAlloc>& s,
0270                                 ios_base::openmode which = ios_base::out | ios_base::in); // C++20
0271     template<class T>
0272       explicit basic_stringstream(const T& t,
0273                                   ios_base::openmode which = ios_base::out | ios_base::in); // Since C++26
0274     template<class T>
0275       basic_stringstream(const T& t, const Allocator& a);                                   // Since C++26
0276     template<class T>
0277       basic_stringstream(const T& t, ios_base::openmode which, const Allocator& a);         // Since C++26
0278     basic_stringstream(const basic_stringstream&) = delete;
0279     basic_stringstream(basic_stringstream&& rhs);
0280 
0281     // [stringstream.assign] Assign and swap:
0282     basic_stringstream& operator=(const basic_stringstream&) = delete;
0283     basic_stringstream& operator=(basic_stringstream&& rhs);
0284     void swap(basic_stringstream& rhs);
0285 
0286     // [stringstream.members] Member functions:
0287     basic_stringbuf<char_type, traits_type, allocator_type>* rdbuf() const;
0288     basic_string<char_type, traits_type, allocator_type> str() const;                     // before C++20
0289     basic_string<char_type, traits_type, allocator_type> str() const &;                   // C++20
0290     template <class SAlloc>
0291     basic_string<char_type, traits_type, SAlloc> str(const SAlloc& sa) const;             // C++20
0292     basic_string<char_type, traits_type, allocator_type> str() &&;                        // C++20
0293     basic_string_view<char_type, traits_type> view() const noexcept;                      // C++20
0294     void str(const basic_string<char_type, traits_type, allocator_type>& s);
0295     template <class SAlloc>
0296     void str(const basic_string<char_type, traits_type, SAlloc>& s);                      // C++20
0297     void str(basic_string<char_type, traits_type, allocator_type>&& s);                   // C++20
0298     template<class T>
0299       void str(const T& t);                                                               // Since C++26
0300 };
0301 
0302 template <class charT, class traits, class Allocator>
0303 void swap(basic_stringstream<charT, traits, Allocator>& x,
0304           basic_stringstream<charT, traits, Allocator>& y);
0305 
0306 typedef basic_stringstream<char>    stringstream;
0307 typedef basic_stringstream<wchar_t> wstringstream;
0308 
0309 }  // std
0310 
0311 */
0312 
0313 // clang-format on
0314 
0315 #if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
0316 #  include <__cxx03/sstream>
0317 #else
0318 #  include <__config>
0319 
0320 #  if _LIBCPP_HAS_LOCALIZATION
0321 
0322 #    include <__fwd/sstream.h>
0323 #    include <__ostream/basic_ostream.h>
0324 #    include <__type_traits/is_convertible.h>
0325 #    include <__utility/swap.h>
0326 #    include <ios>
0327 #    include <istream>
0328 #    include <locale>
0329 #    include <string>
0330 #    include <string_view>
0331 #    include <version>
0332 
0333 #    if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0334 #      pragma GCC system_header
0335 #    endif
0336 
0337 _LIBCPP_PUSH_MACROS
0338 #    include <__undef_macros>
0339 
0340 _LIBCPP_BEGIN_NAMESPACE_STD
0341 
0342 // Class template basic_stringbuf [stringbuf]
0343 
0344 template <class _CharT, class _Traits, class _Allocator>
0345 class _LIBCPP_TEMPLATE_VIS basic_stringbuf : public basic_streambuf<_CharT, _Traits> {
0346 public:
0347   typedef _CharT char_type;
0348   typedef _Traits traits_type;
0349   typedef typename traits_type::int_type int_type;
0350   typedef typename traits_type::pos_type pos_type;
0351   typedef typename traits_type::off_type off_type;
0352   typedef _Allocator allocator_type;
0353 
0354   typedef basic_string<char_type, traits_type, allocator_type> string_type;
0355 
0356 private:
0357   string_type __str_;
0358   mutable char_type* __hm_;
0359   ios_base::openmode __mode_;
0360   _LIBCPP_HIDE_FROM_ABI void __init_buf_ptrs();
0361   _LIBCPP_HIDE_FROM_ABI void __move_init(basic_stringbuf&& __rhs);
0362 
0363 public:
0364   // [stringbuf.cons] constructors:
0365   _LIBCPP_HIDE_FROM_ABI basic_stringbuf() : __hm_(nullptr), __mode_(ios_base::in | ios_base::out) {
0366     // it is implementation-defined whether we initialize eback() & friends to nullptr, and libc++ doesn't
0367     __init_buf_ptrs();
0368   }
0369 
0370   _LIBCPP_HIDE_FROM_ABI explicit basic_stringbuf(ios_base::openmode __wch) : __hm_(nullptr), __mode_(__wch) {
0371     // it is implementation-defined whether we initialize eback() & friends to nullptr, and libc++ doesn't
0372     __init_buf_ptrs();
0373   }
0374 
0375   _LIBCPP_HIDE_FROM_ABI explicit basic_stringbuf(const string_type& __s,
0376                                                  ios_base::openmode __wch = ios_base::in | ios_base::out)
0377       : __str_(__s.get_allocator()), __hm_(nullptr), __mode_(__wch) {
0378     str(__s);
0379   }
0380 
0381 #    if _LIBCPP_STD_VER >= 20
0382   _LIBCPP_HIDE_FROM_ABI explicit basic_stringbuf(const allocator_type& __a)
0383       : basic_stringbuf(ios_base::in | ios_base::out, __a) {}
0384 
0385   _LIBCPP_HIDE_FROM_ABI basic_stringbuf(ios_base::openmode __wch, const allocator_type& __a)
0386       : __str_(__a), __hm_(nullptr), __mode_(__wch) {
0387     __init_buf_ptrs();
0388   }
0389 
0390   _LIBCPP_HIDE_FROM_ABI explicit basic_stringbuf(string_type&& __s,
0391                                                  ios_base::openmode __wch = ios_base::in | ios_base::out)
0392       : __str_(std::move(__s)), __hm_(nullptr), __mode_(__wch) {
0393     __init_buf_ptrs();
0394   }
0395 
0396   template <class _SAlloc>
0397   _LIBCPP_HIDE_FROM_ABI
0398   basic_stringbuf(const basic_string<char_type, traits_type, _SAlloc>& __s, const allocator_type& __a)
0399       : basic_stringbuf(__s, ios_base::in | ios_base::out, __a) {}
0400 
0401   template <class _SAlloc>
0402   _LIBCPP_HIDE_FROM_ABI basic_stringbuf(
0403       const basic_string<char_type, traits_type, _SAlloc>& __s, ios_base::openmode __wch, const allocator_type& __a)
0404       : __str_(__s, __a), __hm_(nullptr), __mode_(__wch) {
0405     __init_buf_ptrs();
0406   }
0407 
0408   template <class _SAlloc>
0409     requires(!is_same_v<_SAlloc, allocator_type>)
0410   _LIBCPP_HIDE_FROM_ABI explicit basic_stringbuf(const basic_string<char_type, traits_type, _SAlloc>& __s,
0411                                                  ios_base::openmode __wch = ios_base::in | ios_base::out)
0412       : __str_(__s), __hm_(nullptr), __mode_(__wch) {
0413     __init_buf_ptrs();
0414   }
0415 #    endif // _LIBCPP_STD_VER >= 20
0416 
0417 #    if _LIBCPP_STD_VER >= 26
0418 
0419   template <class _Tp>
0420     requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
0421   _LIBCPP_HIDE_FROM_ABI explicit basic_stringbuf(const _Tp& __t,
0422                                                  ios_base::openmode __which = ios_base::in | ios_base::out)
0423       : basic_stringbuf(__t, __which, _Allocator()) {}
0424 
0425   template <class _Tp>
0426     requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
0427   _LIBCPP_HIDE_FROM_ABI basic_stringbuf(const _Tp& __t, const _Allocator& __a)
0428       : basic_stringbuf(__t, ios_base::in | ios_base::out, __a) {}
0429 
0430   template <class _Tp>
0431     requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
0432   _LIBCPP_HIDE_FROM_ABI basic_stringbuf(const _Tp& __t, ios_base::openmode __which, const _Allocator& __a)
0433       : __hm_(nullptr), __mode_(__which) {
0434     basic_string_view<_CharT, _Traits> __sv = __t;
0435     __str_                                  = string_type(__sv, __a);
0436     __init_buf_ptrs();
0437   }
0438 
0439 #    endif //  _LIBCPP_STD_VER >= 26
0440 
0441   basic_stringbuf(const basic_stringbuf&) = delete;
0442   basic_stringbuf(basic_stringbuf&& __rhs) : __mode_(__rhs.__mode_) { __move_init(std::move(__rhs)); }
0443 
0444 #    if _LIBCPP_STD_VER >= 20
0445   _LIBCPP_HIDE_FROM_ABI basic_stringbuf(basic_stringbuf&& __rhs, const allocator_type& __a)
0446       : basic_stringbuf(__rhs.__mode_, __a) {
0447     __move_init(std::move(__rhs));
0448   }
0449 #    endif
0450 
0451   // [stringbuf.assign] Assign and swap:
0452   basic_stringbuf& operator=(const basic_stringbuf&) = delete;
0453   basic_stringbuf& operator=(basic_stringbuf&& __rhs);
0454   void swap(basic_stringbuf& __rhs)
0455 #    if _LIBCPP_STD_VER >= 20
0456       noexcept(allocator_traits<allocator_type>::propagate_on_container_swap::value ||
0457                allocator_traits<allocator_type>::is_always_equal::value)
0458 #    endif
0459           ;
0460 
0461   // [stringbuf.members] Member functions:
0462 
0463 #    if _LIBCPP_STD_VER >= 20
0464   _LIBCPP_HIDE_FROM_ABI allocator_type get_allocator() const noexcept { return __str_.get_allocator(); }
0465 #    endif
0466 
0467 #    if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_BUILDING_LIBRARY)
0468   string_type str() const;
0469 #    else
0470   _LIBCPP_HIDE_FROM_ABI string_type str() const& { return str(__str_.get_allocator()); }
0471 
0472   _LIBCPP_HIDE_FROM_ABI string_type str() && {
0473     const basic_string_view<_CharT, _Traits> __view = view();
0474     typename string_type::size_type __pos           = __view.empty() ? 0 : __view.data() - __str_.data();
0475     // In C++23, this is just string_type(std::move(__str_), __pos, __view.size(), __str_.get_allocator());
0476     // But we need something that works in C++20 also.
0477     string_type __result(std::move(__str_), __str_.get_allocator());
0478     __result.resize(__pos + __view.size());
0479     __result.erase(0, __pos);
0480     __init_buf_ptrs();
0481     return __result;
0482   }
0483 #    endif // _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_BUILDING_LIBRARY)
0484 
0485 #    if _LIBCPP_STD_VER >= 20
0486   template <class _SAlloc>
0487     requires __is_allocator<_SAlloc>::value
0488   _LIBCPP_HIDE_FROM_ABI basic_string<char_type, traits_type, _SAlloc> str(const _SAlloc& __sa) const {
0489     return basic_string<_CharT, _Traits, _SAlloc>(view(), __sa);
0490   }
0491 
0492   _LIBCPP_HIDE_FROM_ABI basic_string_view<char_type, traits_type> view() const noexcept;
0493 #    endif // _LIBCPP_STD_VER >= 20
0494 
0495   void str(const string_type& __s) {
0496     __str_ = __s;
0497     __init_buf_ptrs();
0498   }
0499 
0500 #    if _LIBCPP_STD_VER >= 20
0501   template <class _SAlloc>
0502     requires(!is_same_v<_SAlloc, allocator_type>)
0503   _LIBCPP_HIDE_FROM_ABI void str(const basic_string<char_type, traits_type, _SAlloc>& __s) {
0504     __str_ = __s;
0505     __init_buf_ptrs();
0506   }
0507 
0508   _LIBCPP_HIDE_FROM_ABI void str(string_type&& __s) {
0509     __str_ = std::move(__s);
0510     __init_buf_ptrs();
0511   }
0512 #    endif // _LIBCPP_STD_VER >= 20
0513 
0514 #    if _LIBCPP_STD_VER >= 26
0515 
0516   template <class _Tp>
0517     requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
0518   _LIBCPP_HIDE_FROM_ABI void str(const _Tp& __t) {
0519     basic_string_view<_CharT, _Traits> __sv = __t;
0520     __str_                                  = __sv;
0521     __init_buf_ptrs();
0522   }
0523 
0524 #    endif //  _LIBCPP_STD_VER >= 26
0525 
0526 protected:
0527   // [stringbuf.virtuals] Overridden virtual functions:
0528   int_type underflow() override;
0529   int_type pbackfail(int_type __c = traits_type::eof()) override;
0530   int_type overflow(int_type __c = traits_type::eof()) override;
0531   pos_type
0532   seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode __wch = ios_base::in | ios_base::out) override;
0533   _LIBCPP_HIDE_FROM_ABI_VIRTUAL
0534   pos_type seekpos(pos_type __sp, ios_base::openmode __wch = ios_base::in | ios_base::out) override {
0535     return seekoff(__sp, ios_base::beg, __wch);
0536   }
0537 };
0538 
0539 template <class _CharT, class _Traits, class _Allocator>
0540 _LIBCPP_HIDE_FROM_ABI void basic_stringbuf<_CharT, _Traits, _Allocator>::__move_init(basic_stringbuf&& __rhs) {
0541   char_type* __p   = const_cast<char_type*>(__rhs.__str_.data());
0542   ptrdiff_t __binp = -1;
0543   ptrdiff_t __ninp = -1;
0544   ptrdiff_t __einp = -1;
0545   if (__rhs.eback() != nullptr) {
0546     __binp = __rhs.eback() - __p;
0547     __ninp = __rhs.gptr() - __p;
0548     __einp = __rhs.egptr() - __p;
0549   }
0550   ptrdiff_t __bout = -1;
0551   ptrdiff_t __nout = -1;
0552   ptrdiff_t __eout = -1;
0553   if (__rhs.pbase() != nullptr) {
0554     __bout = __rhs.pbase() - __p;
0555     __nout = __rhs.pptr() - __p;
0556     __eout = __rhs.epptr() - __p;
0557   }
0558   ptrdiff_t __hm = __rhs.__hm_ == nullptr ? -1 : __rhs.__hm_ - __p;
0559   __str_         = std::move(__rhs.__str_);
0560   __p            = const_cast<char_type*>(__str_.data());
0561   if (__binp != -1)
0562     this->setg(__p + __binp, __p + __ninp, __p + __einp);
0563   if (__bout != -1) {
0564     this->setp(__p + __bout, __p + __eout);
0565     this->__pbump(__nout);
0566   }
0567   __hm_ = __hm == -1 ? nullptr : __p + __hm;
0568   __p   = const_cast<char_type*>(__rhs.__str_.data());
0569   __rhs.setg(__p, __p, __p);
0570   __rhs.setp(__p, __p);
0571   __rhs.__hm_ = __p;
0572   this->pubimbue(__rhs.getloc());
0573 }
0574 
0575 template <class _CharT, class _Traits, class _Allocator>
0576 basic_stringbuf<_CharT, _Traits, _Allocator>&
0577 basic_stringbuf<_CharT, _Traits, _Allocator>::operator=(basic_stringbuf&& __rhs) {
0578   char_type* __p   = const_cast<char_type*>(__rhs.__str_.data());
0579   ptrdiff_t __binp = -1;
0580   ptrdiff_t __ninp = -1;
0581   ptrdiff_t __einp = -1;
0582   if (__rhs.eback() != nullptr) {
0583     __binp = __rhs.eback() - __p;
0584     __ninp = __rhs.gptr() - __p;
0585     __einp = __rhs.egptr() - __p;
0586   }
0587   ptrdiff_t __bout = -1;
0588   ptrdiff_t __nout = -1;
0589   ptrdiff_t __eout = -1;
0590   if (__rhs.pbase() != nullptr) {
0591     __bout = __rhs.pbase() - __p;
0592     __nout = __rhs.pptr() - __p;
0593     __eout = __rhs.epptr() - __p;
0594   }
0595   ptrdiff_t __hm = __rhs.__hm_ == nullptr ? -1 : __rhs.__hm_ - __p;
0596   __str_         = std::move(__rhs.__str_);
0597   __p            = const_cast<char_type*>(__str_.data());
0598   if (__binp != -1)
0599     this->setg(__p + __binp, __p + __ninp, __p + __einp);
0600   else
0601     this->setg(nullptr, nullptr, nullptr);
0602   if (__bout != -1) {
0603     this->setp(__p + __bout, __p + __eout);
0604     this->__pbump(__nout);
0605   } else
0606     this->setp(nullptr, nullptr);
0607 
0608   __hm_   = __hm == -1 ? nullptr : __p + __hm;
0609   __mode_ = __rhs.__mode_;
0610   __p     = const_cast<char_type*>(__rhs.__str_.data());
0611   __rhs.setg(__p, __p, __p);
0612   __rhs.setp(__p, __p);
0613   __rhs.__hm_ = __p;
0614   this->pubimbue(__rhs.getloc());
0615   return *this;
0616 }
0617 
0618 template <class _CharT, class _Traits, class _Allocator>
0619 void basic_stringbuf<_CharT, _Traits, _Allocator>::swap(basic_stringbuf& __rhs)
0620 #    if _LIBCPP_STD_VER >= 20
0621     noexcept(allocator_traits<_Allocator>::propagate_on_container_swap::value ||
0622              allocator_traits<_Allocator>::is_always_equal::value)
0623 #    endif
0624 {
0625   char_type* __p    = const_cast<char_type*>(__rhs.__str_.data());
0626   ptrdiff_t __rbinp = -1;
0627   ptrdiff_t __rninp = -1;
0628   ptrdiff_t __reinp = -1;
0629   if (__rhs.eback() != nullptr) {
0630     __rbinp = __rhs.eback() - __p;
0631     __rninp = __rhs.gptr() - __p;
0632     __reinp = __rhs.egptr() - __p;
0633   }
0634   ptrdiff_t __rbout = -1;
0635   ptrdiff_t __rnout = -1;
0636   ptrdiff_t __reout = -1;
0637   if (__rhs.pbase() != nullptr) {
0638     __rbout = __rhs.pbase() - __p;
0639     __rnout = __rhs.pptr() - __p;
0640     __reout = __rhs.epptr() - __p;
0641   }
0642   ptrdiff_t __rhm   = __rhs.__hm_ == nullptr ? -1 : __rhs.__hm_ - __p;
0643   __p               = const_cast<char_type*>(__str_.data());
0644   ptrdiff_t __lbinp = -1;
0645   ptrdiff_t __lninp = -1;
0646   ptrdiff_t __leinp = -1;
0647   if (this->eback() != nullptr) {
0648     __lbinp = this->eback() - __p;
0649     __lninp = this->gptr() - __p;
0650     __leinp = this->egptr() - __p;
0651   }
0652   ptrdiff_t __lbout = -1;
0653   ptrdiff_t __lnout = -1;
0654   ptrdiff_t __leout = -1;
0655   if (this->pbase() != nullptr) {
0656     __lbout = this->pbase() - __p;
0657     __lnout = this->pptr() - __p;
0658     __leout = this->epptr() - __p;
0659   }
0660   ptrdiff_t __lhm = __hm_ == nullptr ? -1 : __hm_ - __p;
0661   std::swap(__mode_, __rhs.__mode_);
0662   __str_.swap(__rhs.__str_);
0663   __p = const_cast<char_type*>(__str_.data());
0664   if (__rbinp != -1)
0665     this->setg(__p + __rbinp, __p + __rninp, __p + __reinp);
0666   else
0667     this->setg(nullptr, nullptr, nullptr);
0668   if (__rbout != -1) {
0669     this->setp(__p + __rbout, __p + __reout);
0670     this->__pbump(__rnout);
0671   } else
0672     this->setp(nullptr, nullptr);
0673   __hm_ = __rhm == -1 ? nullptr : __p + __rhm;
0674   __p   = const_cast<char_type*>(__rhs.__str_.data());
0675   if (__lbinp != -1)
0676     __rhs.setg(__p + __lbinp, __p + __lninp, __p + __leinp);
0677   else
0678     __rhs.setg(nullptr, nullptr, nullptr);
0679   if (__lbout != -1) {
0680     __rhs.setp(__p + __lbout, __p + __leout);
0681     __rhs.__pbump(__lnout);
0682   } else
0683     __rhs.setp(nullptr, nullptr);
0684   __rhs.__hm_ = __lhm == -1 ? nullptr : __p + __lhm;
0685   locale __tl = __rhs.getloc();
0686   __rhs.pubimbue(this->getloc());
0687   this->pubimbue(__tl);
0688 }
0689 
0690 template <class _CharT, class _Traits, class _Allocator>
0691 inline _LIBCPP_HIDE_FROM_ABI void
0692 swap(basic_stringbuf<_CharT, _Traits, _Allocator>& __x, basic_stringbuf<_CharT, _Traits, _Allocator>& __y)
0693 #    if _LIBCPP_STD_VER >= 20
0694     noexcept(noexcept(__x.swap(__y)))
0695 #    endif
0696 {
0697   __x.swap(__y);
0698 }
0699 
0700 #    if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_BUILDING_LIBRARY)
0701 template <class _CharT, class _Traits, class _Allocator>
0702 basic_string<_CharT, _Traits, _Allocator> basic_stringbuf<_CharT, _Traits, _Allocator>::str() const {
0703   if (__mode_ & ios_base::out) {
0704     if (__hm_ < this->pptr())
0705       __hm_ = this->pptr();
0706     return string_type(this->pbase(), __hm_, __str_.get_allocator());
0707   } else if (__mode_ & ios_base::in)
0708     return string_type(this->eback(), this->egptr(), __str_.get_allocator());
0709   return string_type(__str_.get_allocator());
0710 }
0711 #    endif // _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_BUILDING_LIBRARY)
0712 
0713 template <class _CharT, class _Traits, class _Allocator>
0714 _LIBCPP_HIDE_FROM_ABI void basic_stringbuf<_CharT, _Traits, _Allocator>::__init_buf_ptrs() {
0715   __hm_                                = nullptr;
0716   char_type* __data                    = const_cast<char_type*>(__str_.data());
0717   typename string_type::size_type __sz = __str_.size();
0718   if (__mode_ & ios_base::in) {
0719     __hm_ = __data + __sz;
0720     this->setg(__data, __data, __hm_);
0721   }
0722   if (__mode_ & ios_base::out) {
0723     __hm_ = __data + __sz;
0724     __str_.resize(__str_.capacity());
0725     this->setp(__data, __data + __str_.size());
0726     if (__mode_ & (ios_base::app | ios_base::ate)) {
0727       while (__sz > INT_MAX) {
0728         this->pbump(INT_MAX);
0729         __sz -= INT_MAX;
0730       }
0731       if (__sz > 0)
0732         this->pbump(__sz);
0733     }
0734   }
0735 }
0736 
0737 #    if _LIBCPP_STD_VER >= 20
0738 template <class _CharT, class _Traits, class _Allocator>
0739 _LIBCPP_HIDE_FROM_ABI basic_string_view<_CharT, _Traits>
0740 basic_stringbuf<_CharT, _Traits, _Allocator>::view() const noexcept {
0741   if (__mode_ & ios_base::out) {
0742     if (__hm_ < this->pptr())
0743       __hm_ = this->pptr();
0744     return basic_string_view<_CharT, _Traits>(this->pbase(), __hm_);
0745   } else if (__mode_ & ios_base::in)
0746     return basic_string_view<_CharT, _Traits>(this->eback(), this->egptr());
0747   return basic_string_view<_CharT, _Traits>();
0748 }
0749 #    endif // _LIBCPP_STD_VER >= 20
0750 
0751 template <class _CharT, class _Traits, class _Allocator>
0752 typename basic_stringbuf<_CharT, _Traits, _Allocator>::int_type
0753 basic_stringbuf<_CharT, _Traits, _Allocator>::underflow() {
0754   if (__hm_ < this->pptr())
0755     __hm_ = this->pptr();
0756   if (__mode_ & ios_base::in) {
0757     if (this->egptr() < __hm_)
0758       this->setg(this->eback(), this->gptr(), __hm_);
0759     if (this->gptr() < this->egptr())
0760       return traits_type::to_int_type(*this->gptr());
0761   }
0762   return traits_type::eof();
0763 }
0764 
0765 template <class _CharT, class _Traits, class _Allocator>
0766 typename basic_stringbuf<_CharT, _Traits, _Allocator>::int_type
0767 basic_stringbuf<_CharT, _Traits, _Allocator>::pbackfail(int_type __c) {
0768   if (__hm_ < this->pptr())
0769     __hm_ = this->pptr();
0770   if (this->eback() < this->gptr()) {
0771     if (traits_type::eq_int_type(__c, traits_type::eof())) {
0772       this->setg(this->eback(), this->gptr() - 1, __hm_);
0773       return traits_type::not_eof(__c);
0774     }
0775     if ((__mode_ & ios_base::out) || traits_type::eq(traits_type::to_char_type(__c), this->gptr()[-1])) {
0776       this->setg(this->eback(), this->gptr() - 1, __hm_);
0777       *this->gptr() = traits_type::to_char_type(__c);
0778       return __c;
0779     }
0780   }
0781   return traits_type::eof();
0782 }
0783 
0784 template <class _CharT, class _Traits, class _Allocator>
0785 typename basic_stringbuf<_CharT, _Traits, _Allocator>::int_type
0786 basic_stringbuf<_CharT, _Traits, _Allocator>::overflow(int_type __c) {
0787   if (!traits_type::eq_int_type(__c, traits_type::eof())) {
0788     ptrdiff_t __ninp = this->gptr() - this->eback();
0789     if (this->pptr() == this->epptr()) {
0790       if (!(__mode_ & ios_base::out))
0791         return traits_type::eof();
0792 #    if _LIBCPP_HAS_EXCEPTIONS
0793       try {
0794 #    endif // _LIBCPP_HAS_EXCEPTIONS
0795         ptrdiff_t __nout = this->pptr() - this->pbase();
0796         ptrdiff_t __hm   = __hm_ - this->pbase();
0797         __str_.push_back(char_type());
0798         __str_.resize(__str_.capacity());
0799         char_type* __p = const_cast<char_type*>(__str_.data());
0800         this->setp(__p, __p + __str_.size());
0801         this->__pbump(__nout);
0802         __hm_ = this->pbase() + __hm;
0803 #    if _LIBCPP_HAS_EXCEPTIONS
0804       } catch (...) {
0805         return traits_type::eof();
0806       }
0807 #    endif // _LIBCPP_HAS_EXCEPTIONS
0808     }
0809     __hm_ = std::max(this->pptr() + 1, __hm_);
0810     if (__mode_ & ios_base::in) {
0811       char_type* __p = const_cast<char_type*>(__str_.data());
0812       this->setg(__p, __p + __ninp, __hm_);
0813     }
0814     return this->sputc(traits_type::to_char_type(__c));
0815   }
0816   return traits_type::not_eof(__c);
0817 }
0818 
0819 template <class _CharT, class _Traits, class _Allocator>
0820 typename basic_stringbuf<_CharT, _Traits, _Allocator>::pos_type basic_stringbuf<_CharT, _Traits, _Allocator>::seekoff(
0821     off_type __off, ios_base::seekdir __way, ios_base::openmode __wch) {
0822   if (__hm_ < this->pptr())
0823     __hm_ = this->pptr();
0824   if ((__wch & (ios_base::in | ios_base::out)) == 0)
0825     return pos_type(-1);
0826   if ((__wch & (ios_base::in | ios_base::out)) == (ios_base::in | ios_base::out) && __way == ios_base::cur)
0827     return pos_type(-1);
0828   const ptrdiff_t __hm = __hm_ == nullptr ? 0 : __hm_ - __str_.data();
0829   off_type __noff;
0830   switch (__way) {
0831   case ios_base::beg:
0832     __noff = 0;
0833     break;
0834   case ios_base::cur:
0835     if (__wch & ios_base::in)
0836       __noff = this->gptr() - this->eback();
0837     else
0838       __noff = this->pptr() - this->pbase();
0839     break;
0840   case ios_base::end:
0841     __noff = __hm;
0842     break;
0843   default:
0844     return pos_type(-1);
0845   }
0846   __noff += __off;
0847   if (__noff < 0 || __hm < __noff)
0848     return pos_type(-1);
0849   if (__noff != 0) {
0850     if ((__wch & ios_base::in) && this->gptr() == nullptr)
0851       return pos_type(-1);
0852     if ((__wch & ios_base::out) && this->pptr() == nullptr)
0853       return pos_type(-1);
0854   }
0855   if (__wch & ios_base::in)
0856     this->setg(this->eback(), this->eback() + __noff, __hm_);
0857   if (__wch & ios_base::out) {
0858     this->setp(this->pbase(), this->epptr());
0859     this->__pbump(__noff);
0860   }
0861   return pos_type(__noff);
0862 }
0863 
0864 // Class template basic_istringstream [istringstream]
0865 
0866 template <class _CharT, class _Traits, class _Allocator>
0867 class _LIBCPP_TEMPLATE_VIS basic_istringstream : public basic_istream<_CharT, _Traits> {
0868 public:
0869   typedef _CharT char_type;
0870   typedef _Traits traits_type;
0871   typedef typename traits_type::int_type int_type;
0872   typedef typename traits_type::pos_type pos_type;
0873   typedef typename traits_type::off_type off_type;
0874   typedef _Allocator allocator_type;
0875 
0876   typedef basic_string<char_type, traits_type, allocator_type> string_type;
0877 
0878 private:
0879   basic_stringbuf<char_type, traits_type, allocator_type> __sb_;
0880 
0881 public:
0882   // [istringstream.cons] Constructors:
0883   _LIBCPP_HIDE_FROM_ABI basic_istringstream()
0884       : basic_istream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(ios_base::in) {}
0885 
0886   _LIBCPP_HIDE_FROM_ABI explicit basic_istringstream(ios_base::openmode __wch)
0887       : basic_istream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__wch | ios_base::in) {}
0888 
0889   _LIBCPP_HIDE_FROM_ABI explicit basic_istringstream(const string_type& __s, ios_base::openmode __wch = ios_base::in)
0890       : basic_istream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__s, __wch | ios_base::in) {}
0891 
0892 #    if _LIBCPP_STD_VER >= 20
0893   _LIBCPP_HIDE_FROM_ABI basic_istringstream(ios_base::openmode __wch, const _Allocator& __a)
0894       : basic_istream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__wch | ios_base::in, __a) {}
0895 
0896   _LIBCPP_HIDE_FROM_ABI explicit basic_istringstream(string_type&& __s, ios_base::openmode __wch = ios_base::in)
0897       : basic_istream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(std::move(__s), __wch | ios_base::in) {}
0898 
0899   template <class _SAlloc>
0900   _LIBCPP_HIDE_FROM_ABI basic_istringstream(const basic_string<_CharT, _Traits, _SAlloc>& __s, const _Allocator& __a)
0901       : basic_istringstream(__s, ios_base::in, __a) {}
0902 
0903   template <class _SAlloc>
0904   _LIBCPP_HIDE_FROM_ABI basic_istringstream(
0905       const basic_string<_CharT, _Traits, _SAlloc>& __s, ios_base::openmode __wch, const _Allocator& __a)
0906       : basic_istream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__s, __wch | ios_base::in, __a) {}
0907 
0908   template <class _SAlloc>
0909   _LIBCPP_HIDE_FROM_ABI explicit basic_istringstream(const basic_string<_CharT, _Traits, _SAlloc>& __s,
0910                                                      ios_base::openmode __wch = ios_base::in)
0911       : basic_istream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__s, __wch | ios_base::in) {}
0912 #    endif // _LIBCPP_STD_VER >= 20
0913 
0914 #    if _LIBCPP_STD_VER >= 26
0915 
0916   template <class _Tp>
0917     requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
0918   _LIBCPP_HIDE_FROM_ABI explicit basic_istringstream(const _Tp& __t, ios_base::openmode __which = ios_base::in)
0919       : basic_istringstream(__t, __which, _Allocator()) {}
0920 
0921   template <class _Tp>
0922     requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
0923   _LIBCPP_HIDE_FROM_ABI basic_istringstream(const _Tp& __t, const _Allocator& __a)
0924       : basic_istringstream(__t, ios_base::in, __a) {}
0925 
0926   template <class _Tp>
0927     requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
0928   _LIBCPP_HIDE_FROM_ABI basic_istringstream(const _Tp& __t, ios_base::openmode __which, const _Allocator& __a)
0929       : basic_istream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__t, __which | ios_base::in, __a) {}
0930 
0931 #    endif //  _LIBCPP_STD_VER >= 26
0932 
0933   basic_istringstream(const basic_istringstream&) = delete;
0934   _LIBCPP_HIDE_FROM_ABI basic_istringstream(basic_istringstream&& __rhs)
0935       : basic_istream<_CharT, _Traits>(std::move(__rhs)), __sb_(std::move(__rhs.__sb_)) {
0936     basic_istream<_CharT, _Traits>::set_rdbuf(std::addressof(__sb_));
0937   }
0938 
0939   // [istringstream.assign] Assign and swap:
0940   basic_istringstream& operator=(const basic_istringstream&) = delete;
0941   basic_istringstream& operator=(basic_istringstream&& __rhs) {
0942     basic_istream<char_type, traits_type>::operator=(std::move(__rhs));
0943     __sb_ = std::move(__rhs.__sb_);
0944     return *this;
0945   }
0946   _LIBCPP_HIDE_FROM_ABI void swap(basic_istringstream& __rhs) {
0947     basic_istream<char_type, traits_type>::swap(__rhs);
0948     __sb_.swap(__rhs.__sb_);
0949   }
0950 
0951   // [istringstream.members] Member functions:
0952   _LIBCPP_HIDE_FROM_ABI basic_stringbuf<char_type, traits_type, allocator_type>* rdbuf() const {
0953     return const_cast<basic_stringbuf<char_type, traits_type, allocator_type>*>(std::addressof(__sb_));
0954   }
0955 
0956 #    if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_BUILDING_LIBRARY)
0957   _LIBCPP_HIDE_FROM_ABI string_type str() const { return __sb_.str(); }
0958 #    else
0959   _LIBCPP_HIDE_FROM_ABI string_type str() const& { return __sb_.str(); }
0960 
0961   _LIBCPP_HIDE_FROM_ABI string_type str() && { return std::move(__sb_).str(); }
0962 #    endif
0963 
0964 #    if _LIBCPP_STD_VER >= 20
0965   template <class _SAlloc>
0966     requires __is_allocator<_SAlloc>::value
0967   _LIBCPP_HIDE_FROM_ABI basic_string<char_type, traits_type, _SAlloc> str(const _SAlloc& __sa) const {
0968     return __sb_.str(__sa);
0969   }
0970 
0971   _LIBCPP_HIDE_FROM_ABI basic_string_view<char_type, traits_type> view() const noexcept { return __sb_.view(); }
0972 #    endif // _LIBCPP_STD_VER >= 20
0973 
0974   _LIBCPP_HIDE_FROM_ABI void str(const string_type& __s) { __sb_.str(__s); }
0975 
0976 #    if _LIBCPP_STD_VER >= 20
0977   template <class _SAlloc>
0978   _LIBCPP_HIDE_FROM_ABI void str(const basic_string<char_type, traits_type, _SAlloc>& __s) {
0979     __sb_.str(__s);
0980   }
0981 
0982   _LIBCPP_HIDE_FROM_ABI void str(string_type&& __s) { __sb_.str(std::move(__s)); }
0983 #    endif // _LIBCPP_STD_VER >= 20
0984 
0985 #    if _LIBCPP_STD_VER >= 26
0986   template <class _Tp>
0987     requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
0988   _LIBCPP_HIDE_FROM_ABI void str(const _Tp& __t) {
0989     rdbuf()->str(__t);
0990   }
0991 #    endif //  _LIBCPP_STD_VER >= 26
0992 };
0993 
0994 template <class _CharT, class _Traits, class _Allocator>
0995 inline _LIBCPP_HIDE_FROM_ABI void
0996 swap(basic_istringstream<_CharT, _Traits, _Allocator>& __x, basic_istringstream<_CharT, _Traits, _Allocator>& __y) {
0997   __x.swap(__y);
0998 }
0999 
1000 // Class template basic_ostringstream [ostringstream]
1001 
1002 template <class _CharT, class _Traits, class _Allocator>
1003 class _LIBCPP_TEMPLATE_VIS basic_ostringstream : public basic_ostream<_CharT, _Traits> {
1004 public:
1005   typedef _CharT char_type;
1006   typedef _Traits traits_type;
1007   typedef typename traits_type::int_type int_type;
1008   typedef typename traits_type::pos_type pos_type;
1009   typedef typename traits_type::off_type off_type;
1010   typedef _Allocator allocator_type;
1011 
1012   typedef basic_string<char_type, traits_type, allocator_type> string_type;
1013 
1014 private:
1015   basic_stringbuf<char_type, traits_type, allocator_type> __sb_;
1016 
1017 public:
1018   // [ostringstream.cons] Constructors:
1019   _LIBCPP_HIDE_FROM_ABI basic_ostringstream()
1020       : basic_ostream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(ios_base::out) {}
1021 
1022   _LIBCPP_HIDE_FROM_ABI explicit basic_ostringstream(ios_base::openmode __wch)
1023       : basic_ostream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__wch | ios_base::out) {}
1024 
1025   _LIBCPP_HIDE_FROM_ABI explicit basic_ostringstream(const string_type& __s, ios_base::openmode __wch = ios_base::out)
1026       : basic_ostream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__s, __wch | ios_base::out) {}
1027 
1028 #    if _LIBCPP_STD_VER >= 20
1029   _LIBCPP_HIDE_FROM_ABI basic_ostringstream(ios_base::openmode __wch, const _Allocator& __a)
1030       : basic_ostream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__wch | ios_base::out, __a) {}
1031 
1032   _LIBCPP_HIDE_FROM_ABI explicit basic_ostringstream(string_type&& __s, ios_base::openmode __wch = ios_base::out)
1033       : basic_ostream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(std::move(__s), __wch | ios_base::out) {}
1034 
1035   template <class _SAlloc>
1036   _LIBCPP_HIDE_FROM_ABI basic_ostringstream(const basic_string<_CharT, _Traits, _SAlloc>& __s, const _Allocator& __a)
1037       : basic_ostringstream(__s, ios_base::out, __a) {}
1038 
1039   template <class _SAlloc>
1040   _LIBCPP_HIDE_FROM_ABI basic_ostringstream(
1041       const basic_string<_CharT, _Traits, _SAlloc>& __s, ios_base::openmode __wch, const _Allocator& __a)
1042       : basic_ostream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__s, __wch | ios_base::out, __a) {}
1043 
1044   template <class _SAlloc>
1045     requires(!is_same_v<_SAlloc, allocator_type>)
1046   _LIBCPP_HIDE_FROM_ABI explicit basic_ostringstream(const basic_string<_CharT, _Traits, _SAlloc>& __s,
1047                                                      ios_base::openmode __wch = ios_base::out)
1048       : basic_ostream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__s, __wch | ios_base::out) {}
1049 #    endif // _LIBCPP_STD_VER >= 20
1050 
1051 #    if _LIBCPP_STD_VER >= 26
1052 
1053   template <class _Tp>
1054     requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
1055   _LIBCPP_HIDE_FROM_ABI explicit basic_ostringstream(const _Tp& __t, ios_base::openmode __which = ios_base::out)
1056       : basic_ostringstream(__t, __which | ios_base::out, _Allocator()) {}
1057 
1058   template <class _Tp>
1059     requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
1060   _LIBCPP_HIDE_FROM_ABI basic_ostringstream(const _Tp& __t, const _Allocator& __a)
1061       : basic_ostringstream(__t, ios_base::out, __a) {}
1062 
1063   template <class _Tp>
1064     requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
1065   _LIBCPP_HIDE_FROM_ABI basic_ostringstream(const _Tp& __t, ios_base::openmode __which, const _Allocator& __a)
1066       : basic_ostream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__t, __which | ios_base::out, __a) {}
1067 
1068 #    endif //  _LIBCPP_STD_VER >= 26
1069 
1070   basic_ostringstream(const basic_ostringstream&) = delete;
1071   _LIBCPP_HIDE_FROM_ABI basic_ostringstream(basic_ostringstream&& __rhs)
1072       : basic_ostream<_CharT, _Traits>(std::move(__rhs)), __sb_(std::move(__rhs.__sb_)) {
1073     basic_ostream<_CharT, _Traits>::set_rdbuf(std::addressof(__sb_));
1074   }
1075 
1076   // [ostringstream.assign] Assign and swap:
1077   basic_ostringstream& operator=(const basic_ostringstream&) = delete;
1078   basic_ostringstream& operator=(basic_ostringstream&& __rhs) {
1079     basic_ostream<char_type, traits_type>::operator=(std::move(__rhs));
1080     __sb_ = std::move(__rhs.__sb_);
1081     return *this;
1082   }
1083 
1084   _LIBCPP_HIDE_FROM_ABI void swap(basic_ostringstream& __rhs) {
1085     basic_ostream<char_type, traits_type>::swap(__rhs);
1086     __sb_.swap(__rhs.__sb_);
1087   }
1088 
1089   // [ostringstream.members] Member functions:
1090   _LIBCPP_HIDE_FROM_ABI basic_stringbuf<char_type, traits_type, allocator_type>* rdbuf() const {
1091     return const_cast<basic_stringbuf<char_type, traits_type, allocator_type>*>(std::addressof(__sb_));
1092   }
1093 
1094 #    if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_BUILDING_LIBRARY)
1095   _LIBCPP_HIDE_FROM_ABI string_type str() const { return __sb_.str(); }
1096 #    else
1097   _LIBCPP_HIDE_FROM_ABI string_type str() const& { return __sb_.str(); }
1098 
1099   _LIBCPP_HIDE_FROM_ABI string_type str() && { return std::move(__sb_).str(); }
1100 #    endif
1101 
1102 #    if _LIBCPP_STD_VER >= 20
1103   template <class _SAlloc>
1104     requires __is_allocator<_SAlloc>::value
1105   _LIBCPP_HIDE_FROM_ABI basic_string<char_type, traits_type, _SAlloc> str(const _SAlloc& __sa) const {
1106     return __sb_.str(__sa);
1107   }
1108 
1109   _LIBCPP_HIDE_FROM_ABI basic_string_view<char_type, traits_type> view() const noexcept { return __sb_.view(); }
1110 #    endif // _LIBCPP_STD_VER >= 20
1111 
1112   _LIBCPP_HIDE_FROM_ABI void str(const string_type& __s) { __sb_.str(__s); }
1113 
1114 #    if _LIBCPP_STD_VER >= 20
1115   template <class _SAlloc>
1116   _LIBCPP_HIDE_FROM_ABI void str(const basic_string<char_type, traits_type, _SAlloc>& __s) {
1117     __sb_.str(__s);
1118   }
1119 
1120   _LIBCPP_HIDE_FROM_ABI void str(string_type&& __s) { __sb_.str(std::move(__s)); }
1121 #    endif // _LIBCPP_STD_VER >= 20
1122 
1123 #    if _LIBCPP_STD_VER >= 26
1124   template <class _Tp>
1125     requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
1126   _LIBCPP_HIDE_FROM_ABI void str(const _Tp& __t) {
1127     rdbuf()->str(__t);
1128   }
1129 #    endif //  _LIBCPP_STD_VER >= 26
1130 };
1131 
1132 template <class _CharT, class _Traits, class _Allocator>
1133 inline _LIBCPP_HIDE_FROM_ABI void
1134 swap(basic_ostringstream<_CharT, _Traits, _Allocator>& __x, basic_ostringstream<_CharT, _Traits, _Allocator>& __y) {
1135   __x.swap(__y);
1136 }
1137 
1138 // Class template basic_stringstream [stringstream]
1139 
1140 template <class _CharT, class _Traits, class _Allocator>
1141 class _LIBCPP_TEMPLATE_VIS basic_stringstream : public basic_iostream<_CharT, _Traits> {
1142 public:
1143   typedef _CharT char_type;
1144   typedef _Traits traits_type;
1145   typedef typename traits_type::int_type int_type;
1146   typedef typename traits_type::pos_type pos_type;
1147   typedef typename traits_type::off_type off_type;
1148   typedef _Allocator allocator_type;
1149 
1150   typedef basic_string<char_type, traits_type, allocator_type> string_type;
1151 
1152 private:
1153   basic_stringbuf<char_type, traits_type, allocator_type> __sb_;
1154 
1155 public:
1156   // [stringstream.cons] constructors
1157   _LIBCPP_HIDE_FROM_ABI basic_stringstream()
1158       : basic_iostream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(ios_base::in | ios_base::out) {}
1159 
1160   _LIBCPP_HIDE_FROM_ABI explicit basic_stringstream(ios_base::openmode __wch)
1161       : basic_iostream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__wch) {}
1162 
1163   _LIBCPP_HIDE_FROM_ABI explicit basic_stringstream(const string_type& __s,
1164                                                     ios_base::openmode __wch = ios_base::in | ios_base::out)
1165       : basic_iostream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__s, __wch) {}
1166 
1167 #    if _LIBCPP_STD_VER >= 20
1168   _LIBCPP_HIDE_FROM_ABI basic_stringstream(ios_base::openmode __wch, const _Allocator& __a)
1169       : basic_iostream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__wch, __a) {}
1170 
1171   _LIBCPP_HIDE_FROM_ABI explicit basic_stringstream(string_type&& __s,
1172                                                     ios_base::openmode __wch = ios_base::out | ios_base::in)
1173       : basic_iostream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(std::move(__s), __wch) {}
1174 
1175   template <class _SAlloc>
1176   _LIBCPP_HIDE_FROM_ABI basic_stringstream(const basic_string<_CharT, _Traits, _SAlloc>& __s, const _Allocator& __a)
1177       : basic_stringstream(__s, ios_base::out | ios_base::in, __a) {}
1178 
1179   template <class _SAlloc>
1180   _LIBCPP_HIDE_FROM_ABI
1181   basic_stringstream(const basic_string<_CharT, _Traits, _SAlloc>& __s, ios_base::openmode __wch, const _Allocator& __a)
1182       : basic_iostream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__s, __wch, __a) {}
1183 
1184   template <class _SAlloc>
1185     requires(!is_same_v<_SAlloc, allocator_type>)
1186   _LIBCPP_HIDE_FROM_ABI explicit basic_stringstream(const basic_string<_CharT, _Traits, _SAlloc>& __s,
1187                                                     ios_base::openmode __wch = ios_base::out | ios_base::in)
1188       : basic_iostream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__s, __wch) {}
1189 #    endif // _LIBCPP_STD_VER >= 20
1190 
1191 #    if _LIBCPP_STD_VER >= 26
1192 
1193   template <class _Tp>
1194     requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
1195   _LIBCPP_HIDE_FROM_ABI explicit basic_stringstream(const _Tp& __t,
1196                                                     ios_base::openmode __which = ios_base::out | ios_base::in)
1197       : basic_stringstream(__t, __which, _Allocator()) {}
1198 
1199   template <class _Tp>
1200     requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
1201   _LIBCPP_HIDE_FROM_ABI basic_stringstream(const _Tp& __t, const _Allocator& __a)
1202       : basic_stringstream(__t, ios_base::out | ios_base::in, __a) {}
1203 
1204   template <class _Tp>
1205     requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
1206   _LIBCPP_HIDE_FROM_ABI basic_stringstream(const _Tp& __t, ios_base::openmode __which, const _Allocator& __a)
1207       : basic_iostream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__t, __which, __a) {}
1208 
1209 #    endif //  _LIBCPP_STD_VER >= 26
1210 
1211   basic_stringstream(const basic_stringstream&) = delete;
1212   _LIBCPP_HIDE_FROM_ABI basic_stringstream(basic_stringstream&& __rhs)
1213       : basic_iostream<_CharT, _Traits>(std::move(__rhs)), __sb_(std::move(__rhs.__sb_)) {
1214     basic_istream<_CharT, _Traits>::set_rdbuf(std::addressof(__sb_));
1215   }
1216 
1217   // [stringstream.assign] Assign and swap:
1218   basic_stringstream& operator=(const basic_stringstream&) = delete;
1219   basic_stringstream& operator=(basic_stringstream&& __rhs) {
1220     basic_iostream<char_type, traits_type>::operator=(std::move(__rhs));
1221     __sb_ = std::move(__rhs.__sb_);
1222     return *this;
1223   }
1224   _LIBCPP_HIDE_FROM_ABI void swap(basic_stringstream& __rhs) {
1225     basic_iostream<char_type, traits_type>::swap(__rhs);
1226     __sb_.swap(__rhs.__sb_);
1227   }
1228 
1229   // [stringstream.members] Member functions:
1230   _LIBCPP_HIDE_FROM_ABI basic_stringbuf<char_type, traits_type, allocator_type>* rdbuf() const {
1231     return const_cast<basic_stringbuf<char_type, traits_type, allocator_type>*>(std::addressof(__sb_));
1232   }
1233 
1234 #    if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_BUILDING_LIBRARY)
1235   _LIBCPP_HIDE_FROM_ABI string_type str() const { return __sb_.str(); }
1236 #    else
1237   _LIBCPP_HIDE_FROM_ABI string_type str() const& { return __sb_.str(); }
1238 
1239   _LIBCPP_HIDE_FROM_ABI string_type str() && { return std::move(__sb_).str(); }
1240 #    endif
1241 
1242 #    if _LIBCPP_STD_VER >= 20
1243   template <class _SAlloc>
1244     requires __is_allocator<_SAlloc>::value
1245   _LIBCPP_HIDE_FROM_ABI basic_string<char_type, traits_type, _SAlloc> str(const _SAlloc& __sa) const {
1246     return __sb_.str(__sa);
1247   }
1248 
1249   _LIBCPP_HIDE_FROM_ABI basic_string_view<char_type, traits_type> view() const noexcept { return __sb_.view(); }
1250 #    endif // _LIBCPP_STD_VER >= 20
1251 
1252   _LIBCPP_HIDE_FROM_ABI void str(const string_type& __s) { __sb_.str(__s); }
1253 
1254 #    if _LIBCPP_STD_VER >= 20
1255   template <class _SAlloc>
1256   _LIBCPP_HIDE_FROM_ABI void str(const basic_string<char_type, traits_type, _SAlloc>& __s) {
1257     __sb_.str(__s);
1258   }
1259 
1260   _LIBCPP_HIDE_FROM_ABI void str(string_type&& __s) { __sb_.str(std::move(__s)); }
1261 #    endif // _LIBCPP_STD_VER >= 20
1262 
1263 #    if _LIBCPP_STD_VER >= 26
1264   template <class _Tp>
1265     requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
1266   _LIBCPP_HIDE_FROM_ABI void str(const _Tp& __t) {
1267     rdbuf()->str(__t);
1268   }
1269 #    endif //  _LIBCPP_STD_VER >= 26
1270 };
1271 
1272 template <class _CharT, class _Traits, class _Allocator>
1273 inline _LIBCPP_HIDE_FROM_ABI void
1274 swap(basic_stringstream<_CharT, _Traits, _Allocator>& __x, basic_stringstream<_CharT, _Traits, _Allocator>& __y) {
1275   __x.swap(__y);
1276 }
1277 
1278 #    if _LIBCPP_AVAILABILITY_HAS_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1
1279 extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_stringbuf<char>;
1280 extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_stringstream<char>;
1281 extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ostringstream<char>;
1282 extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_istringstream<char>;
1283 #    endif
1284 
1285 _LIBCPP_END_NAMESPACE_STD
1286 
1287 _LIBCPP_POP_MACROS
1288 
1289 #  endif // _LIBCPP_HAS_LOCALIZATION
1290 
1291 #  if _LIBCPP_STD_VER <= 20 && !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES)
1292 #    include <ostream>
1293 #    include <type_traits>
1294 #  endif
1295 #endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
1296 
1297 #endif // _LIBCPP_SSTREAM