|  | // -*- 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_CODECVT | 
|  | #define _LIBCPP_CODECVT | 
|  |  | 
|  | /* | 
|  | codecvt synopsis | 
|  |  | 
|  | namespace std | 
|  | { | 
|  |  | 
|  | enum codecvt_mode | 
|  | { | 
|  | consume_header = 4, | 
|  | generate_header = 2, | 
|  | little_endian = 1 | 
|  | }; | 
|  |  | 
|  | template <class Elem, unsigned long Maxcode = 0x10ffff, | 
|  | codecvt_mode Mode = (codecvt_mode)0> | 
|  | class codecvt_utf8 | 
|  | : public codecvt<Elem, char, mbstate_t> | 
|  | { | 
|  | explicit codecvt_utf8(size_t refs = 0); | 
|  | ~codecvt_utf8(); | 
|  | }; | 
|  |  | 
|  | template <class Elem, unsigned long Maxcode = 0x10ffff, | 
|  | codecvt_mode Mode = (codecvt_mode)0> | 
|  | class codecvt_utf16 | 
|  | : public codecvt<Elem, char, mbstate_t> | 
|  | { | 
|  | explicit codecvt_utf16(size_t refs = 0); | 
|  | ~codecvt_utf16(); | 
|  | }; | 
|  |  | 
|  | template <class Elem, unsigned long Maxcode = 0x10ffff, | 
|  | codecvt_mode Mode = (codecvt_mode)0> | 
|  | class codecvt_utf8_utf16 | 
|  | : public codecvt<Elem, char, mbstate_t> | 
|  | { | 
|  | explicit codecvt_utf8_utf16(size_t refs = 0); | 
|  | ~codecvt_utf8_utf16(); | 
|  | }; | 
|  |  | 
|  | }  // std | 
|  |  | 
|  | */ | 
|  |  | 
|  | #if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS) | 
|  | #  include <__cxx03/codecvt> | 
|  | #else | 
|  | #  include <__config> | 
|  |  | 
|  | #  if _LIBCPP_HAS_LOCALIZATION | 
|  |  | 
|  | #    include <__locale> | 
|  | #    include <version> | 
|  |  | 
|  | #    if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) | 
|  | #      pragma GCC system_header | 
|  | #    endif | 
|  |  | 
|  | #    if _LIBCPP_STD_VER < 26 || defined(_LIBCPP_BUILDING_LIBRARY) || defined(_LIBCPP_ENABLE_CXX26_REMOVED_CODECVT) | 
|  |  | 
|  | _LIBCPP_BEGIN_NAMESPACE_STD | 
|  |  | 
|  | enum _LIBCPP_DEPRECATED_IN_CXX17 codecvt_mode { consume_header = 4, generate_header = 2, little_endian = 1 }; | 
|  |  | 
|  | // codecvt_utf8 | 
|  |  | 
|  | template <class _Elem> | 
|  | class __codecvt_utf8; | 
|  |  | 
|  | #      if _LIBCPP_HAS_WIDE_CHARACTERS | 
|  | template <> | 
|  | class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf8<wchar_t> : public codecvt<wchar_t, char, mbstate_t> { | 
|  | unsigned long __maxcode_; | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_PUSH | 
|  | codecvt_mode __mode_; | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | public: | 
|  | typedef wchar_t intern_type; | 
|  | typedef char extern_type; | 
|  | typedef mbstate_t state_type; | 
|  |  | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_PUSH | 
|  | _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf8(size_t __refs, unsigned long __maxcode, codecvt_mode __mode) | 
|  | : codecvt<wchar_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {} | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | protected: | 
|  | result do_out(state_type& __st, | 
|  | const intern_type* __frm, | 
|  | const intern_type* __frm_end, | 
|  | const intern_type*& __frm_nxt, | 
|  | extern_type* __to, | 
|  | extern_type* __to_end, | 
|  | extern_type*& __to_nxt) const override; | 
|  | result do_in(state_type& __st, | 
|  | const extern_type* __frm, | 
|  | const extern_type* __frm_end, | 
|  | const extern_type*& __frm_nxt, | 
|  | intern_type* __to, | 
|  | intern_type* __to_end, | 
|  | intern_type*& __to_nxt) const override; | 
|  | result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override; | 
|  | int do_encoding() const _NOEXCEPT override; | 
|  | bool do_always_noconv() const _NOEXCEPT override; | 
|  | int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override; | 
|  | int do_max_length() const _NOEXCEPT override; | 
|  | }; | 
|  | #      endif // _LIBCPP_HAS_WIDE_CHARACTERS | 
|  |  | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_PUSH | 
|  | template <> | 
|  | class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf8<char16_t> : public codecvt<char16_t, char, mbstate_t> { | 
|  | unsigned long __maxcode_; | 
|  | codecvt_mode __mode_; | 
|  |  | 
|  | public: | 
|  | typedef char16_t intern_type; | 
|  | typedef char extern_type; | 
|  | typedef mbstate_t state_type; | 
|  |  | 
|  | _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf8(size_t __refs, unsigned long __maxcode, codecvt_mode __mode) | 
|  | : codecvt<char16_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {} | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | protected: | 
|  | result do_out(state_type& __st, | 
|  | const intern_type* __frm, | 
|  | const intern_type* __frm_end, | 
|  | const intern_type*& __frm_nxt, | 
|  | extern_type* __to, | 
|  | extern_type* __to_end, | 
|  | extern_type*& __to_nxt) const override; | 
|  | result do_in(state_type& __st, | 
|  | const extern_type* __frm, | 
|  | const extern_type* __frm_end, | 
|  | const extern_type*& __frm_nxt, | 
|  | intern_type* __to, | 
|  | intern_type* __to_end, | 
|  | intern_type*& __to_nxt) const override; | 
|  | result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override; | 
|  | int do_encoding() const _NOEXCEPT override; | 
|  | bool do_always_noconv() const _NOEXCEPT override; | 
|  | int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override; | 
|  | int do_max_length() const _NOEXCEPT override; | 
|  | }; | 
|  |  | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_PUSH | 
|  | template <> | 
|  | class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf8<char32_t> : public codecvt<char32_t, char, mbstate_t> { | 
|  | unsigned long __maxcode_; | 
|  | codecvt_mode __mode_; | 
|  |  | 
|  | public: | 
|  | typedef char32_t intern_type; | 
|  | typedef char extern_type; | 
|  | typedef mbstate_t state_type; | 
|  |  | 
|  | _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf8(size_t __refs, unsigned long __maxcode, codecvt_mode __mode) | 
|  | : codecvt<char32_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {} | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | protected: | 
|  | result do_out(state_type& __st, | 
|  | const intern_type* __frm, | 
|  | const intern_type* __frm_end, | 
|  | const intern_type*& __frm_nxt, | 
|  | extern_type* __to, | 
|  | extern_type* __to_end, | 
|  | extern_type*& __to_nxt) const override; | 
|  | result do_in(state_type& __st, | 
|  | const extern_type* __frm, | 
|  | const extern_type* __frm_end, | 
|  | const extern_type*& __frm_nxt, | 
|  | intern_type* __to, | 
|  | intern_type* __to_end, | 
|  | intern_type*& __to_nxt) const override; | 
|  | result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override; | 
|  | int do_encoding() const _NOEXCEPT override; | 
|  | bool do_always_noconv() const _NOEXCEPT override; | 
|  | int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override; | 
|  | int do_max_length() const _NOEXCEPT override; | 
|  | }; | 
|  |  | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_PUSH | 
|  | template <class _Elem, unsigned long _Maxcode = 0x10ffff, codecvt_mode _Mode = (codecvt_mode)0> | 
|  | class _LIBCPP_DEPRECATED_IN_CXX17 codecvt_utf8 : public __codecvt_utf8<_Elem> { | 
|  | public: | 
|  | _LIBCPP_HIDE_FROM_ABI explicit codecvt_utf8(size_t __refs = 0) : __codecvt_utf8<_Elem>(__refs, _Maxcode, _Mode) {} | 
|  |  | 
|  | _LIBCPP_HIDE_FROM_ABI ~codecvt_utf8() {} | 
|  | }; | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | // codecvt_utf16 | 
|  |  | 
|  | template <class _Elem, bool _LittleEndian> | 
|  | class __codecvt_utf16; | 
|  |  | 
|  | #      if _LIBCPP_HAS_WIDE_CHARACTERS | 
|  | template <> | 
|  | class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf16<wchar_t, false> : public codecvt<wchar_t, char, mbstate_t> { | 
|  | unsigned long __maxcode_; | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_PUSH | 
|  | codecvt_mode __mode_; | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | public: | 
|  | typedef wchar_t intern_type; | 
|  | typedef char extern_type; | 
|  | typedef mbstate_t state_type; | 
|  |  | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_PUSH | 
|  | _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf16(size_t __refs, unsigned long __maxcode, codecvt_mode __mode) | 
|  | : codecvt<wchar_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {} | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | protected: | 
|  | result do_out(state_type& __st, | 
|  | const intern_type* __frm, | 
|  | const intern_type* __frm_end, | 
|  | const intern_type*& __frm_nxt, | 
|  | extern_type* __to, | 
|  | extern_type* __to_end, | 
|  | extern_type*& __to_nxt) const override; | 
|  | result do_in(state_type& __st, | 
|  | const extern_type* __frm, | 
|  | const extern_type* __frm_end, | 
|  | const extern_type*& __frm_nxt, | 
|  | intern_type* __to, | 
|  | intern_type* __to_end, | 
|  | intern_type*& __to_nxt) const override; | 
|  | result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override; | 
|  | int do_encoding() const _NOEXCEPT override; | 
|  | bool do_always_noconv() const _NOEXCEPT override; | 
|  | int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override; | 
|  | int do_max_length() const _NOEXCEPT override; | 
|  | }; | 
|  |  | 
|  | template <> | 
|  | class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf16<wchar_t, true> : public codecvt<wchar_t, char, mbstate_t> { | 
|  | unsigned long __maxcode_; | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_PUSH | 
|  | codecvt_mode __mode_; | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | public: | 
|  | typedef wchar_t intern_type; | 
|  | typedef char extern_type; | 
|  | typedef mbstate_t state_type; | 
|  |  | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_PUSH | 
|  | _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf16(size_t __refs, unsigned long __maxcode, codecvt_mode __mode) | 
|  | : codecvt<wchar_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {} | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | protected: | 
|  | result do_out(state_type& __st, | 
|  | const intern_type* __frm, | 
|  | const intern_type* __frm_end, | 
|  | const intern_type*& __frm_nxt, | 
|  | extern_type* __to, | 
|  | extern_type* __to_end, | 
|  | extern_type*& __to_nxt) const override; | 
|  | result do_in(state_type& __st, | 
|  | const extern_type* __frm, | 
|  | const extern_type* __frm_end, | 
|  | const extern_type*& __frm_nxt, | 
|  | intern_type* __to, | 
|  | intern_type* __to_end, | 
|  | intern_type*& __to_nxt) const override; | 
|  | result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override; | 
|  | int do_encoding() const _NOEXCEPT override; | 
|  | bool do_always_noconv() const _NOEXCEPT override; | 
|  | int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override; | 
|  | int do_max_length() const _NOEXCEPT override; | 
|  | }; | 
|  | #      endif // _LIBCPP_HAS_WIDE_CHARACTERS | 
|  |  | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_PUSH | 
|  | template <> | 
|  | class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf16<char16_t, false> : public codecvt<char16_t, char, mbstate_t> { | 
|  | unsigned long __maxcode_; | 
|  | codecvt_mode __mode_; | 
|  |  | 
|  | public: | 
|  | typedef char16_t intern_type; | 
|  | typedef char extern_type; | 
|  | typedef mbstate_t state_type; | 
|  |  | 
|  | _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf16(size_t __refs, unsigned long __maxcode, codecvt_mode __mode) | 
|  | : codecvt<char16_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {} | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | protected: | 
|  | result do_out(state_type& __st, | 
|  | const intern_type* __frm, | 
|  | const intern_type* __frm_end, | 
|  | const intern_type*& __frm_nxt, | 
|  | extern_type* __to, | 
|  | extern_type* __to_end, | 
|  | extern_type*& __to_nxt) const override; | 
|  | result do_in(state_type& __st, | 
|  | const extern_type* __frm, | 
|  | const extern_type* __frm_end, | 
|  | const extern_type*& __frm_nxt, | 
|  | intern_type* __to, | 
|  | intern_type* __to_end, | 
|  | intern_type*& __to_nxt) const override; | 
|  | result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override; | 
|  | int do_encoding() const _NOEXCEPT override; | 
|  | bool do_always_noconv() const _NOEXCEPT override; | 
|  | int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override; | 
|  | int do_max_length() const _NOEXCEPT override; | 
|  | }; | 
|  |  | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_PUSH | 
|  | template <> | 
|  | class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf16<char16_t, true> : public codecvt<char16_t, char, mbstate_t> { | 
|  | unsigned long __maxcode_; | 
|  | codecvt_mode __mode_; | 
|  |  | 
|  | public: | 
|  | typedef char16_t intern_type; | 
|  | typedef char extern_type; | 
|  | typedef mbstate_t state_type; | 
|  |  | 
|  | _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf16(size_t __refs, unsigned long __maxcode, codecvt_mode __mode) | 
|  | : codecvt<char16_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {} | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | protected: | 
|  | result do_out(state_type& __st, | 
|  | const intern_type* __frm, | 
|  | const intern_type* __frm_end, | 
|  | const intern_type*& __frm_nxt, | 
|  | extern_type* __to, | 
|  | extern_type* __to_end, | 
|  | extern_type*& __to_nxt) const override; | 
|  | result do_in(state_type& __st, | 
|  | const extern_type* __frm, | 
|  | const extern_type* __frm_end, | 
|  | const extern_type*& __frm_nxt, | 
|  | intern_type* __to, | 
|  | intern_type* __to_end, | 
|  | intern_type*& __to_nxt) const override; | 
|  | result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override; | 
|  | int do_encoding() const _NOEXCEPT override; | 
|  | bool do_always_noconv() const _NOEXCEPT override; | 
|  | int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override; | 
|  | int do_max_length() const _NOEXCEPT override; | 
|  | }; | 
|  |  | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_PUSH | 
|  | template <> | 
|  | class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf16<char32_t, false> : public codecvt<char32_t, char, mbstate_t> { | 
|  | unsigned long __maxcode_; | 
|  | codecvt_mode __mode_; | 
|  |  | 
|  | public: | 
|  | typedef char32_t intern_type; | 
|  | typedef char extern_type; | 
|  | typedef mbstate_t state_type; | 
|  |  | 
|  | _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf16(size_t __refs, unsigned long __maxcode, codecvt_mode __mode) | 
|  | : codecvt<char32_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {} | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | protected: | 
|  | result do_out(state_type& __st, | 
|  | const intern_type* __frm, | 
|  | const intern_type* __frm_end, | 
|  | const intern_type*& __frm_nxt, | 
|  | extern_type* __to, | 
|  | extern_type* __to_end, | 
|  | extern_type*& __to_nxt) const override; | 
|  | result do_in(state_type& __st, | 
|  | const extern_type* __frm, | 
|  | const extern_type* __frm_end, | 
|  | const extern_type*& __frm_nxt, | 
|  | intern_type* __to, | 
|  | intern_type* __to_end, | 
|  | intern_type*& __to_nxt) const override; | 
|  | result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override; | 
|  | int do_encoding() const _NOEXCEPT override; | 
|  | bool do_always_noconv() const _NOEXCEPT override; | 
|  | int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override; | 
|  | int do_max_length() const _NOEXCEPT override; | 
|  | }; | 
|  |  | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_PUSH | 
|  | template <> | 
|  | class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf16<char32_t, true> : public codecvt<char32_t, char, mbstate_t> { | 
|  | unsigned long __maxcode_; | 
|  | codecvt_mode __mode_; | 
|  |  | 
|  | public: | 
|  | typedef char32_t intern_type; | 
|  | typedef char extern_type; | 
|  | typedef mbstate_t state_type; | 
|  |  | 
|  | _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf16(size_t __refs, unsigned long __maxcode, codecvt_mode __mode) | 
|  | : codecvt<char32_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {} | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | protected: | 
|  | result do_out(state_type& __st, | 
|  | const intern_type* __frm, | 
|  | const intern_type* __frm_end, | 
|  | const intern_type*& __frm_nxt, | 
|  | extern_type* __to, | 
|  | extern_type* __to_end, | 
|  | extern_type*& __to_nxt) const override; | 
|  | result do_in(state_type& __st, | 
|  | const extern_type* __frm, | 
|  | const extern_type* __frm_end, | 
|  | const extern_type*& __frm_nxt, | 
|  | intern_type* __to, | 
|  | intern_type* __to_end, | 
|  | intern_type*& __to_nxt) const override; | 
|  | result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override; | 
|  | int do_encoding() const _NOEXCEPT override; | 
|  | bool do_always_noconv() const _NOEXCEPT override; | 
|  | int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override; | 
|  | int do_max_length() const _NOEXCEPT override; | 
|  | }; | 
|  |  | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_PUSH | 
|  | template <class _Elem, unsigned long _Maxcode = 0x10ffff, codecvt_mode _Mode = (codecvt_mode)0> | 
|  | class _LIBCPP_DEPRECATED_IN_CXX17 codecvt_utf16 : public __codecvt_utf16<_Elem, _Mode & little_endian> { | 
|  | public: | 
|  | _LIBCPP_HIDE_FROM_ABI explicit codecvt_utf16(size_t __refs = 0) | 
|  | : __codecvt_utf16<_Elem, _Mode & little_endian>(__refs, _Maxcode, _Mode) {} | 
|  |  | 
|  | _LIBCPP_HIDE_FROM_ABI ~codecvt_utf16() {} | 
|  | }; | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | // codecvt_utf8_utf16 | 
|  |  | 
|  | template <class _Elem> | 
|  | class __codecvt_utf8_utf16; | 
|  |  | 
|  | #      if _LIBCPP_HAS_WIDE_CHARACTERS | 
|  | template <> | 
|  | class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf8_utf16<wchar_t> : public codecvt<wchar_t, char, mbstate_t> { | 
|  | unsigned long __maxcode_; | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_PUSH | 
|  | codecvt_mode __mode_; | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | public: | 
|  | typedef wchar_t intern_type; | 
|  | typedef char extern_type; | 
|  | typedef mbstate_t state_type; | 
|  |  | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_PUSH | 
|  | _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf8_utf16(size_t __refs, unsigned long __maxcode, codecvt_mode __mode) | 
|  | : codecvt<wchar_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {} | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | protected: | 
|  | result do_out(state_type& __st, | 
|  | const intern_type* __frm, | 
|  | const intern_type* __frm_end, | 
|  | const intern_type*& __frm_nxt, | 
|  | extern_type* __to, | 
|  | extern_type* __to_end, | 
|  | extern_type*& __to_nxt) const override; | 
|  | result do_in(state_type& __st, | 
|  | const extern_type* __frm, | 
|  | const extern_type* __frm_end, | 
|  | const extern_type*& __frm_nxt, | 
|  | intern_type* __to, | 
|  | intern_type* __to_end, | 
|  | intern_type*& __to_nxt) const override; | 
|  | result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override; | 
|  | int do_encoding() const _NOEXCEPT override; | 
|  | bool do_always_noconv() const _NOEXCEPT override; | 
|  | int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override; | 
|  | int do_max_length() const _NOEXCEPT override; | 
|  | }; | 
|  | #      endif // _LIBCPP_HAS_WIDE_CHARACTERS | 
|  |  | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_PUSH | 
|  | template <> | 
|  | class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf8_utf16<char32_t> : public codecvt<char32_t, char, mbstate_t> { | 
|  | unsigned long __maxcode_; | 
|  | codecvt_mode __mode_; | 
|  |  | 
|  | public: | 
|  | typedef char32_t intern_type; | 
|  | typedef char extern_type; | 
|  | typedef mbstate_t state_type; | 
|  |  | 
|  | _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf8_utf16(size_t __refs, unsigned long __maxcode, codecvt_mode __mode) | 
|  | : codecvt<char32_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {} | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | protected: | 
|  | result do_out(state_type& __st, | 
|  | const intern_type* __frm, | 
|  | const intern_type* __frm_end, | 
|  | const intern_type*& __frm_nxt, | 
|  | extern_type* __to, | 
|  | extern_type* __to_end, | 
|  | extern_type*& __to_nxt) const override; | 
|  | result do_in(state_type& __st, | 
|  | const extern_type* __frm, | 
|  | const extern_type* __frm_end, | 
|  | const extern_type*& __frm_nxt, | 
|  | intern_type* __to, | 
|  | intern_type* __to_end, | 
|  | intern_type*& __to_nxt) const override; | 
|  | result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override; | 
|  | int do_encoding() const _NOEXCEPT override; | 
|  | bool do_always_noconv() const _NOEXCEPT override; | 
|  | int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override; | 
|  | int do_max_length() const _NOEXCEPT override; | 
|  | }; | 
|  |  | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_PUSH | 
|  | template <> | 
|  | class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf8_utf16<char16_t> : public codecvt<char16_t, char, mbstate_t> { | 
|  | unsigned long __maxcode_; | 
|  | codecvt_mode __mode_; | 
|  |  | 
|  | public: | 
|  | typedef char16_t intern_type; | 
|  | typedef char extern_type; | 
|  | typedef mbstate_t state_type; | 
|  |  | 
|  | _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf8_utf16(size_t __refs, unsigned long __maxcode, codecvt_mode __mode) | 
|  | : codecvt<char16_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {} | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | protected: | 
|  | result do_out(state_type& __st, | 
|  | const intern_type* __frm, | 
|  | const intern_type* __frm_end, | 
|  | const intern_type*& __frm_nxt, | 
|  | extern_type* __to, | 
|  | extern_type* __to_end, | 
|  | extern_type*& __to_nxt) const override; | 
|  | result do_in(state_type& __st, | 
|  | const extern_type* __frm, | 
|  | const extern_type* __frm_end, | 
|  | const extern_type*& __frm_nxt, | 
|  | intern_type* __to, | 
|  | intern_type* __to_end, | 
|  | intern_type*& __to_nxt) const override; | 
|  | result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override; | 
|  | int do_encoding() const _NOEXCEPT override; | 
|  | bool do_always_noconv() const _NOEXCEPT override; | 
|  | int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override; | 
|  | int do_max_length() const _NOEXCEPT override; | 
|  | }; | 
|  |  | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_PUSH | 
|  | template <class _Elem, unsigned long _Maxcode = 0x10ffff, codecvt_mode _Mode = (codecvt_mode)0> | 
|  | class _LIBCPP_DEPRECATED_IN_CXX17 codecvt_utf8_utf16 : public __codecvt_utf8_utf16<_Elem> { | 
|  | public: | 
|  | _LIBCPP_HIDE_FROM_ABI explicit codecvt_utf8_utf16(size_t __refs = 0) | 
|  | : __codecvt_utf8_utf16<_Elem>(__refs, _Maxcode, _Mode) {} | 
|  |  | 
|  | _LIBCPP_HIDE_FROM_ABI ~codecvt_utf8_utf16() {} | 
|  | }; | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | _LIBCPP_END_NAMESPACE_STD | 
|  |  | 
|  | #    endif // _LIBCPP_STD_VER < 26 || defined(_LIBCPP_BUILDING_LIBRARY) || defined(_LIBCPP_ENABLE_CXX26_REMOVED_CODECVT) | 
|  |  | 
|  | #  endif // _LIBCPP_HAS_LOCALIZATION | 
|  |  | 
|  | #  if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 | 
|  | #    include <atomic> | 
|  | #    include <concepts> | 
|  | #    include <cstddef> | 
|  | #    include <cstdlib> | 
|  | #    include <cstring> | 
|  | #    include <initializer_list> | 
|  | #    include <iosfwd> | 
|  | #    include <limits> | 
|  | #    include <mutex> | 
|  | #    include <new> | 
|  | #    include <optional> | 
|  | #    include <stdexcept> | 
|  | #    include <type_traits> | 
|  | #    include <typeinfo> | 
|  | #  endif | 
|  | #endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS) | 
|  |  | 
|  | #endif // _LIBCPP_CODECVT |