|  | // -*- 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 | 
|  |  | 
|  | */ | 
|  |  | 
|  | #include <__assert> // all public C++ headers provide the assertion handler | 
|  | #include <__config> | 
|  | #include <__locale> | 
|  | #include <version> | 
|  |  | 
|  | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) | 
|  | #  pragma GCC system_header | 
|  | #endif | 
|  |  | 
|  | _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; | 
|  |  | 
|  | #ifndef _LIBCPP_HAS_NO_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_INLINE_VISIBILITY | 
|  | 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_NO_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_INLINE_VISIBILITY | 
|  | 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_INLINE_VISIBILITY | 
|  | 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_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 codecvt_utf8 | 
|  | : public __codecvt_utf8<_Elem> | 
|  | { | 
|  | public: | 
|  | _LIBCPP_INLINE_VISIBILITY | 
|  | explicit codecvt_utf8(size_t __refs = 0) | 
|  | : __codecvt_utf8<_Elem>(__refs, _Maxcode, _Mode) {} | 
|  |  | 
|  | _LIBCPP_INLINE_VISIBILITY | 
|  | ~codecvt_utf8() {} | 
|  | }; | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | // codecvt_utf16 | 
|  |  | 
|  | template <class _Elem, bool _LittleEndian> class __codecvt_utf16; | 
|  |  | 
|  | #ifndef _LIBCPP_HAS_NO_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_INLINE_VISIBILITY | 
|  | 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_INLINE_VISIBILITY | 
|  | 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_NO_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_INLINE_VISIBILITY | 
|  | 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_INLINE_VISIBILITY | 
|  | 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_INLINE_VISIBILITY | 
|  | 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_INLINE_VISIBILITY | 
|  | 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_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 codecvt_utf16 | 
|  | : public __codecvt_utf16<_Elem, _Mode & little_endian> | 
|  | { | 
|  | public: | 
|  | _LIBCPP_INLINE_VISIBILITY | 
|  | explicit codecvt_utf16(size_t __refs = 0) | 
|  | : __codecvt_utf16<_Elem, _Mode & little_endian>(__refs, _Maxcode, _Mode) {} | 
|  |  | 
|  | _LIBCPP_INLINE_VISIBILITY | 
|  | ~codecvt_utf16() {} | 
|  | }; | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | // codecvt_utf8_utf16 | 
|  |  | 
|  | template <class _Elem> class __codecvt_utf8_utf16; | 
|  |  | 
|  | #ifndef _LIBCPP_HAS_NO_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_INLINE_VISIBILITY | 
|  | 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_NO_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_INLINE_VISIBILITY | 
|  | 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_INLINE_VISIBILITY | 
|  | 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_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 codecvt_utf8_utf16 | 
|  | : public __codecvt_utf8_utf16<_Elem> | 
|  | { | 
|  | public: | 
|  | _LIBCPP_INLINE_VISIBILITY | 
|  | explicit codecvt_utf8_utf16(size_t __refs = 0) | 
|  | : __codecvt_utf8_utf16<_Elem>(__refs, _Maxcode, _Mode) {} | 
|  |  | 
|  | _LIBCPP_INLINE_VISIBILITY | 
|  | ~codecvt_utf8_utf16() {} | 
|  | }; | 
|  | _LIBCPP_SUPPRESS_DEPRECATED_POP | 
|  |  | 
|  | _LIBCPP_END_NAMESPACE_STD | 
|  |  | 
|  | #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 <new> | 
|  | #  include <stdexcept> | 
|  | #  include <type_traits> | 
|  | #  include <typeinfo> | 
|  | #endif | 
|  |  | 
|  | #endif // _LIBCPP_CODECVT |