master
1// -*- C++ -*-
2//===----------------------------------------------------------------------===//
3//
4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5// See https://llvm.org/LICENSE.txt for license information.
6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef _LIBCPP_CODECVT
11#define _LIBCPP_CODECVT
12
13/*
14 codecvt synopsis
15
16namespace std
17{
18
19enum codecvt_mode
20{
21 consume_header = 4,
22 generate_header = 2,
23 little_endian = 1
24};
25
26template <class Elem, unsigned long Maxcode = 0x10ffff,
27 codecvt_mode Mode = (codecvt_mode)0>
28class codecvt_utf8
29 : public codecvt<Elem, char, mbstate_t>
30{
31 explicit codecvt_utf8(size_t refs = 0);
32 ~codecvt_utf8();
33};
34
35template <class Elem, unsigned long Maxcode = 0x10ffff,
36 codecvt_mode Mode = (codecvt_mode)0>
37class codecvt_utf16
38 : public codecvt<Elem, char, mbstate_t>
39{
40 explicit codecvt_utf16(size_t refs = 0);
41 ~codecvt_utf16();
42};
43
44template <class Elem, unsigned long Maxcode = 0x10ffff,
45 codecvt_mode Mode = (codecvt_mode)0>
46class codecvt_utf8_utf16
47 : public codecvt<Elem, char, mbstate_t>
48{
49 explicit codecvt_utf8_utf16(size_t refs = 0);
50 ~codecvt_utf8_utf16();
51};
52
53} // std
54
55*/
56
57#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
58# include <__cxx03/codecvt>
59#else
60# include <__config>
61
62# if _LIBCPP_HAS_LOCALIZATION
63
64# include <__locale>
65# include <version>
66
67# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
68# pragma GCC system_header
69# endif
70
71# if _LIBCPP_STD_VER < 26 || defined(_LIBCPP_BUILDING_LIBRARY) || defined(_LIBCPP_ENABLE_CXX26_REMOVED_CODECVT)
72
73_LIBCPP_BEGIN_NAMESPACE_STD
74
75enum _LIBCPP_DEPRECATED_IN_CXX17 codecvt_mode { consume_header = 4, generate_header = 2, little_endian = 1 };
76
77// codecvt_utf8
78
79template <class _Elem>
80class __codecvt_utf8;
81
82# if _LIBCPP_HAS_WIDE_CHARACTERS
83template <>
84class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf8<wchar_t> : public codecvt<wchar_t, char, mbstate_t> {
85 unsigned long __maxcode_;
86 _LIBCPP_SUPPRESS_DEPRECATED_PUSH
87 codecvt_mode __mode_;
88 _LIBCPP_SUPPRESS_DEPRECATED_POP
89
90public:
91 typedef wchar_t intern_type;
92 typedef char extern_type;
93 typedef mbstate_t state_type;
94
95 _LIBCPP_SUPPRESS_DEPRECATED_PUSH
96 _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf8(size_t __refs, unsigned long __maxcode, codecvt_mode __mode)
97 : codecvt<wchar_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {}
98 _LIBCPP_SUPPRESS_DEPRECATED_POP
99
100protected:
101 result do_out(state_type& __st,
102 const intern_type* __frm,
103 const intern_type* __frm_end,
104 const intern_type*& __frm_nxt,
105 extern_type* __to,
106 extern_type* __to_end,
107 extern_type*& __to_nxt) const override;
108 result do_in(state_type& __st,
109 const extern_type* __frm,
110 const extern_type* __frm_end,
111 const extern_type*& __frm_nxt,
112 intern_type* __to,
113 intern_type* __to_end,
114 intern_type*& __to_nxt) const override;
115 result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override;
116 int do_encoding() const _NOEXCEPT override;
117 bool do_always_noconv() const _NOEXCEPT override;
118 int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override;
119 int do_max_length() const _NOEXCEPT override;
120};
121# endif // _LIBCPP_HAS_WIDE_CHARACTERS
122
123_LIBCPP_SUPPRESS_DEPRECATED_PUSH
124template <>
125class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf8<char16_t> : public codecvt<char16_t, char, mbstate_t> {
126 unsigned long __maxcode_;
127 codecvt_mode __mode_;
128
129public:
130 typedef char16_t intern_type;
131 typedef char extern_type;
132 typedef mbstate_t state_type;
133
134 _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf8(size_t __refs, unsigned long __maxcode, codecvt_mode __mode)
135 : codecvt<char16_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {}
136 _LIBCPP_SUPPRESS_DEPRECATED_POP
137
138protected:
139 result do_out(state_type& __st,
140 const intern_type* __frm,
141 const intern_type* __frm_end,
142 const intern_type*& __frm_nxt,
143 extern_type* __to,
144 extern_type* __to_end,
145 extern_type*& __to_nxt) const override;
146 result do_in(state_type& __st,
147 const extern_type* __frm,
148 const extern_type* __frm_end,
149 const extern_type*& __frm_nxt,
150 intern_type* __to,
151 intern_type* __to_end,
152 intern_type*& __to_nxt) const override;
153 result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override;
154 int do_encoding() const _NOEXCEPT override;
155 bool do_always_noconv() const _NOEXCEPT override;
156 int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override;
157 int do_max_length() const _NOEXCEPT override;
158};
159
160_LIBCPP_SUPPRESS_DEPRECATED_PUSH
161template <>
162class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf8<char32_t> : public codecvt<char32_t, char, mbstate_t> {
163 unsigned long __maxcode_;
164 codecvt_mode __mode_;
165
166public:
167 typedef char32_t intern_type;
168 typedef char extern_type;
169 typedef mbstate_t state_type;
170
171 _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf8(size_t __refs, unsigned long __maxcode, codecvt_mode __mode)
172 : codecvt<char32_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {}
173 _LIBCPP_SUPPRESS_DEPRECATED_POP
174
175protected:
176 result do_out(state_type& __st,
177 const intern_type* __frm,
178 const intern_type* __frm_end,
179 const intern_type*& __frm_nxt,
180 extern_type* __to,
181 extern_type* __to_end,
182 extern_type*& __to_nxt) const override;
183 result do_in(state_type& __st,
184 const extern_type* __frm,
185 const extern_type* __frm_end,
186 const extern_type*& __frm_nxt,
187 intern_type* __to,
188 intern_type* __to_end,
189 intern_type*& __to_nxt) const override;
190 result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override;
191 int do_encoding() const _NOEXCEPT override;
192 bool do_always_noconv() const _NOEXCEPT override;
193 int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override;
194 int do_max_length() const _NOEXCEPT override;
195};
196
197_LIBCPP_SUPPRESS_DEPRECATED_PUSH
198template <class _Elem, unsigned long _Maxcode = 0x10ffff, codecvt_mode _Mode = (codecvt_mode)0>
199class _LIBCPP_DEPRECATED_IN_CXX17 codecvt_utf8 : public __codecvt_utf8<_Elem> {
200public:
201 _LIBCPP_HIDE_FROM_ABI explicit codecvt_utf8(size_t __refs = 0) : __codecvt_utf8<_Elem>(__refs, _Maxcode, _Mode) {}
202
203 _LIBCPP_HIDE_FROM_ABI ~codecvt_utf8() {}
204};
205_LIBCPP_SUPPRESS_DEPRECATED_POP
206
207// codecvt_utf16
208
209template <class _Elem, bool _LittleEndian>
210class __codecvt_utf16;
211
212# if _LIBCPP_HAS_WIDE_CHARACTERS
213template <>
214class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf16<wchar_t, false> : public codecvt<wchar_t, char, mbstate_t> {
215 unsigned long __maxcode_;
216 _LIBCPP_SUPPRESS_DEPRECATED_PUSH
217 codecvt_mode __mode_;
218 _LIBCPP_SUPPRESS_DEPRECATED_POP
219
220public:
221 typedef wchar_t intern_type;
222 typedef char extern_type;
223 typedef mbstate_t state_type;
224
225 _LIBCPP_SUPPRESS_DEPRECATED_PUSH
226 _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf16(size_t __refs, unsigned long __maxcode, codecvt_mode __mode)
227 : codecvt<wchar_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {}
228 _LIBCPP_SUPPRESS_DEPRECATED_POP
229
230protected:
231 result do_out(state_type& __st,
232 const intern_type* __frm,
233 const intern_type* __frm_end,
234 const intern_type*& __frm_nxt,
235 extern_type* __to,
236 extern_type* __to_end,
237 extern_type*& __to_nxt) const override;
238 result do_in(state_type& __st,
239 const extern_type* __frm,
240 const extern_type* __frm_end,
241 const extern_type*& __frm_nxt,
242 intern_type* __to,
243 intern_type* __to_end,
244 intern_type*& __to_nxt) const override;
245 result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override;
246 int do_encoding() const _NOEXCEPT override;
247 bool do_always_noconv() const _NOEXCEPT override;
248 int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override;
249 int do_max_length() const _NOEXCEPT override;
250};
251
252template <>
253class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf16<wchar_t, true> : public codecvt<wchar_t, char, mbstate_t> {
254 unsigned long __maxcode_;
255 _LIBCPP_SUPPRESS_DEPRECATED_PUSH
256 codecvt_mode __mode_;
257 _LIBCPP_SUPPRESS_DEPRECATED_POP
258
259public:
260 typedef wchar_t intern_type;
261 typedef char extern_type;
262 typedef mbstate_t state_type;
263
264 _LIBCPP_SUPPRESS_DEPRECATED_PUSH
265 _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf16(size_t __refs, unsigned long __maxcode, codecvt_mode __mode)
266 : codecvt<wchar_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {}
267 _LIBCPP_SUPPRESS_DEPRECATED_POP
268
269protected:
270 result do_out(state_type& __st,
271 const intern_type* __frm,
272 const intern_type* __frm_end,
273 const intern_type*& __frm_nxt,
274 extern_type* __to,
275 extern_type* __to_end,
276 extern_type*& __to_nxt) const override;
277 result do_in(state_type& __st,
278 const extern_type* __frm,
279 const extern_type* __frm_end,
280 const extern_type*& __frm_nxt,
281 intern_type* __to,
282 intern_type* __to_end,
283 intern_type*& __to_nxt) const override;
284 result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override;
285 int do_encoding() const _NOEXCEPT override;
286 bool do_always_noconv() const _NOEXCEPT override;
287 int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override;
288 int do_max_length() const _NOEXCEPT override;
289};
290# endif // _LIBCPP_HAS_WIDE_CHARACTERS
291
292_LIBCPP_SUPPRESS_DEPRECATED_PUSH
293template <>
294class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf16<char16_t, false> : public codecvt<char16_t, char, mbstate_t> {
295 unsigned long __maxcode_;
296 codecvt_mode __mode_;
297
298public:
299 typedef char16_t intern_type;
300 typedef char extern_type;
301 typedef mbstate_t state_type;
302
303 _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf16(size_t __refs, unsigned long __maxcode, codecvt_mode __mode)
304 : codecvt<char16_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {}
305 _LIBCPP_SUPPRESS_DEPRECATED_POP
306
307protected:
308 result do_out(state_type& __st,
309 const intern_type* __frm,
310 const intern_type* __frm_end,
311 const intern_type*& __frm_nxt,
312 extern_type* __to,
313 extern_type* __to_end,
314 extern_type*& __to_nxt) const override;
315 result do_in(state_type& __st,
316 const extern_type* __frm,
317 const extern_type* __frm_end,
318 const extern_type*& __frm_nxt,
319 intern_type* __to,
320 intern_type* __to_end,
321 intern_type*& __to_nxt) const override;
322 result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override;
323 int do_encoding() const _NOEXCEPT override;
324 bool do_always_noconv() const _NOEXCEPT override;
325 int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override;
326 int do_max_length() const _NOEXCEPT override;
327};
328
329_LIBCPP_SUPPRESS_DEPRECATED_PUSH
330template <>
331class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf16<char16_t, true> : public codecvt<char16_t, char, mbstate_t> {
332 unsigned long __maxcode_;
333 codecvt_mode __mode_;
334
335public:
336 typedef char16_t intern_type;
337 typedef char extern_type;
338 typedef mbstate_t state_type;
339
340 _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf16(size_t __refs, unsigned long __maxcode, codecvt_mode __mode)
341 : codecvt<char16_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {}
342 _LIBCPP_SUPPRESS_DEPRECATED_POP
343
344protected:
345 result do_out(state_type& __st,
346 const intern_type* __frm,
347 const intern_type* __frm_end,
348 const intern_type*& __frm_nxt,
349 extern_type* __to,
350 extern_type* __to_end,
351 extern_type*& __to_nxt) const override;
352 result do_in(state_type& __st,
353 const extern_type* __frm,
354 const extern_type* __frm_end,
355 const extern_type*& __frm_nxt,
356 intern_type* __to,
357 intern_type* __to_end,
358 intern_type*& __to_nxt) const override;
359 result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override;
360 int do_encoding() const _NOEXCEPT override;
361 bool do_always_noconv() const _NOEXCEPT override;
362 int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override;
363 int do_max_length() const _NOEXCEPT override;
364};
365
366_LIBCPP_SUPPRESS_DEPRECATED_PUSH
367template <>
368class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf16<char32_t, false> : public codecvt<char32_t, char, mbstate_t> {
369 unsigned long __maxcode_;
370 codecvt_mode __mode_;
371
372public:
373 typedef char32_t intern_type;
374 typedef char extern_type;
375 typedef mbstate_t state_type;
376
377 _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf16(size_t __refs, unsigned long __maxcode, codecvt_mode __mode)
378 : codecvt<char32_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {}
379 _LIBCPP_SUPPRESS_DEPRECATED_POP
380
381protected:
382 result do_out(state_type& __st,
383 const intern_type* __frm,
384 const intern_type* __frm_end,
385 const intern_type*& __frm_nxt,
386 extern_type* __to,
387 extern_type* __to_end,
388 extern_type*& __to_nxt) const override;
389 result do_in(state_type& __st,
390 const extern_type* __frm,
391 const extern_type* __frm_end,
392 const extern_type*& __frm_nxt,
393 intern_type* __to,
394 intern_type* __to_end,
395 intern_type*& __to_nxt) const override;
396 result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override;
397 int do_encoding() const _NOEXCEPT override;
398 bool do_always_noconv() const _NOEXCEPT override;
399 int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override;
400 int do_max_length() const _NOEXCEPT override;
401};
402
403_LIBCPP_SUPPRESS_DEPRECATED_PUSH
404template <>
405class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf16<char32_t, true> : public codecvt<char32_t, char, mbstate_t> {
406 unsigned long __maxcode_;
407 codecvt_mode __mode_;
408
409public:
410 typedef char32_t intern_type;
411 typedef char extern_type;
412 typedef mbstate_t state_type;
413
414 _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf16(size_t __refs, unsigned long __maxcode, codecvt_mode __mode)
415 : codecvt<char32_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {}
416 _LIBCPP_SUPPRESS_DEPRECATED_POP
417
418protected:
419 result do_out(state_type& __st,
420 const intern_type* __frm,
421 const intern_type* __frm_end,
422 const intern_type*& __frm_nxt,
423 extern_type* __to,
424 extern_type* __to_end,
425 extern_type*& __to_nxt) const override;
426 result do_in(state_type& __st,
427 const extern_type* __frm,
428 const extern_type* __frm_end,
429 const extern_type*& __frm_nxt,
430 intern_type* __to,
431 intern_type* __to_end,
432 intern_type*& __to_nxt) const override;
433 result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override;
434 int do_encoding() const _NOEXCEPT override;
435 bool do_always_noconv() const _NOEXCEPT override;
436 int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override;
437 int do_max_length() const _NOEXCEPT override;
438};
439
440_LIBCPP_SUPPRESS_DEPRECATED_PUSH
441template <class _Elem, unsigned long _Maxcode = 0x10ffff, codecvt_mode _Mode = (codecvt_mode)0>
442class _LIBCPP_DEPRECATED_IN_CXX17 codecvt_utf16 : public __codecvt_utf16<_Elem, _Mode & little_endian> {
443public:
444 _LIBCPP_HIDE_FROM_ABI explicit codecvt_utf16(size_t __refs = 0)
445 : __codecvt_utf16<_Elem, _Mode & little_endian>(__refs, _Maxcode, _Mode) {}
446
447 _LIBCPP_HIDE_FROM_ABI ~codecvt_utf16() {}
448};
449_LIBCPP_SUPPRESS_DEPRECATED_POP
450
451// codecvt_utf8_utf16
452
453template <class _Elem>
454class __codecvt_utf8_utf16;
455
456# if _LIBCPP_HAS_WIDE_CHARACTERS
457template <>
458class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf8_utf16<wchar_t> : public codecvt<wchar_t, char, mbstate_t> {
459 unsigned long __maxcode_;
460 _LIBCPP_SUPPRESS_DEPRECATED_PUSH
461 codecvt_mode __mode_;
462 _LIBCPP_SUPPRESS_DEPRECATED_POP
463
464public:
465 typedef wchar_t intern_type;
466 typedef char extern_type;
467 typedef mbstate_t state_type;
468
469 _LIBCPP_SUPPRESS_DEPRECATED_PUSH
470 _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf8_utf16(size_t __refs, unsigned long __maxcode, codecvt_mode __mode)
471 : codecvt<wchar_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {}
472 _LIBCPP_SUPPRESS_DEPRECATED_POP
473
474protected:
475 result do_out(state_type& __st,
476 const intern_type* __frm,
477 const intern_type* __frm_end,
478 const intern_type*& __frm_nxt,
479 extern_type* __to,
480 extern_type* __to_end,
481 extern_type*& __to_nxt) const override;
482 result do_in(state_type& __st,
483 const extern_type* __frm,
484 const extern_type* __frm_end,
485 const extern_type*& __frm_nxt,
486 intern_type* __to,
487 intern_type* __to_end,
488 intern_type*& __to_nxt) const override;
489 result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override;
490 int do_encoding() const _NOEXCEPT override;
491 bool do_always_noconv() const _NOEXCEPT override;
492 int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override;
493 int do_max_length() const _NOEXCEPT override;
494};
495# endif // _LIBCPP_HAS_WIDE_CHARACTERS
496
497_LIBCPP_SUPPRESS_DEPRECATED_PUSH
498template <>
499class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf8_utf16<char32_t> : public codecvt<char32_t, char, mbstate_t> {
500 unsigned long __maxcode_;
501 codecvt_mode __mode_;
502
503public:
504 typedef char32_t intern_type;
505 typedef char extern_type;
506 typedef mbstate_t state_type;
507
508 _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf8_utf16(size_t __refs, unsigned long __maxcode, codecvt_mode __mode)
509 : codecvt<char32_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {}
510 _LIBCPP_SUPPRESS_DEPRECATED_POP
511
512protected:
513 result do_out(state_type& __st,
514 const intern_type* __frm,
515 const intern_type* __frm_end,
516 const intern_type*& __frm_nxt,
517 extern_type* __to,
518 extern_type* __to_end,
519 extern_type*& __to_nxt) const override;
520 result do_in(state_type& __st,
521 const extern_type* __frm,
522 const extern_type* __frm_end,
523 const extern_type*& __frm_nxt,
524 intern_type* __to,
525 intern_type* __to_end,
526 intern_type*& __to_nxt) const override;
527 result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override;
528 int do_encoding() const _NOEXCEPT override;
529 bool do_always_noconv() const _NOEXCEPT override;
530 int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override;
531 int do_max_length() const _NOEXCEPT override;
532};
533
534_LIBCPP_SUPPRESS_DEPRECATED_PUSH
535template <>
536class _LIBCPP_EXPORTED_FROM_ABI __codecvt_utf8_utf16<char16_t> : public codecvt<char16_t, char, mbstate_t> {
537 unsigned long __maxcode_;
538 codecvt_mode __mode_;
539
540public:
541 typedef char16_t intern_type;
542 typedef char extern_type;
543 typedef mbstate_t state_type;
544
545 _LIBCPP_HIDE_FROM_ABI explicit __codecvt_utf8_utf16(size_t __refs, unsigned long __maxcode, codecvt_mode __mode)
546 : codecvt<char16_t, char, mbstate_t>(__refs), __maxcode_(__maxcode), __mode_(__mode) {}
547 _LIBCPP_SUPPRESS_DEPRECATED_POP
548
549protected:
550 result do_out(state_type& __st,
551 const intern_type* __frm,
552 const intern_type* __frm_end,
553 const intern_type*& __frm_nxt,
554 extern_type* __to,
555 extern_type* __to_end,
556 extern_type*& __to_nxt) const override;
557 result do_in(state_type& __st,
558 const extern_type* __frm,
559 const extern_type* __frm_end,
560 const extern_type*& __frm_nxt,
561 intern_type* __to,
562 intern_type* __to_end,
563 intern_type*& __to_nxt) const override;
564 result do_unshift(state_type& __st, extern_type* __to, extern_type* __to_end, extern_type*& __to_nxt) const override;
565 int do_encoding() const _NOEXCEPT override;
566 bool do_always_noconv() const _NOEXCEPT override;
567 int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const override;
568 int do_max_length() const _NOEXCEPT override;
569};
570
571_LIBCPP_SUPPRESS_DEPRECATED_PUSH
572template <class _Elem, unsigned long _Maxcode = 0x10ffff, codecvt_mode _Mode = (codecvt_mode)0>
573class _LIBCPP_DEPRECATED_IN_CXX17 codecvt_utf8_utf16 : public __codecvt_utf8_utf16<_Elem> {
574public:
575 _LIBCPP_HIDE_FROM_ABI explicit codecvt_utf8_utf16(size_t __refs = 0)
576 : __codecvt_utf8_utf16<_Elem>(__refs, _Maxcode, _Mode) {}
577
578 _LIBCPP_HIDE_FROM_ABI ~codecvt_utf8_utf16() {}
579};
580_LIBCPP_SUPPRESS_DEPRECATED_POP
581
582_LIBCPP_END_NAMESPACE_STD
583
584# endif // _LIBCPP_STD_VER < 26 || defined(_LIBCPP_BUILDING_LIBRARY) || defined(_LIBCPP_ENABLE_CXX26_REMOVED_CODECVT)
585
586# endif // _LIBCPP_HAS_LOCALIZATION
587
588# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
589# include <atomic>
590# include <concepts>
591# include <cstddef>
592# include <cstdlib>
593# include <cstring>
594# include <initializer_list>
595# include <iosfwd>
596# include <limits>
597# include <mutex>
598# include <new>
599# include <optional>
600# include <stdexcept>
601# include <type_traits>
602# include <typeinfo>
603# endif
604#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
605
606#endif // _LIBCPP_CODECVT