Line data Source code
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_STRING_VIEW
11 : #define _LIBCPP_STRING_VIEW
12 :
13 : /*
14 :
15 : string_view synopsis
16 :
17 : #include <compare>
18 :
19 : namespace std {
20 :
21 : // 7.2, Class template basic_string_view
22 : template<class charT, class traits = char_traits<charT>>
23 : class basic_string_view;
24 :
25 : template<class charT, class traits>
26 : inline constexpr bool ranges::enable_view<basic_string_view<charT, traits>> = true;
27 :
28 : template<class charT, class traits>
29 : inline constexpr bool ranges::enable_borrowed_range<basic_string_view<charT, traits>> = true; // C++20
30 :
31 : // 7.9, basic_string_view non-member comparison functions
32 : template<class charT, class traits>
33 : constexpr bool operator==(basic_string_view<charT, traits> x,
34 : basic_string_view<charT, traits> y) noexcept;
35 : template<class charT, class traits> // Removed in C++20
36 : constexpr bool operator!=(basic_string_view<charT, traits> x,
37 : basic_string_view<charT, traits> y) noexcept;
38 : template<class charT, class traits> // Removed in C++20
39 : constexpr bool operator< (basic_string_view<charT, traits> x,
40 : basic_string_view<charT, traits> y) noexcept;
41 : template<class charT, class traits> // Removed in C++20
42 : constexpr bool operator> (basic_string_view<charT, traits> x,
43 : basic_string_view<charT, traits> y) noexcept;
44 : template<class charT, class traits> // Removed in C++20
45 : constexpr bool operator<=(basic_string_view<charT, traits> x,
46 : basic_string_view<charT, traits> y) noexcept;
47 : template<class charT, class traits> // Removed in C++20
48 : constexpr bool operator>=(basic_string_view<charT, traits> x,
49 : basic_string_view<charT, traits> y) noexcept;
50 : template<class charT, class traits> // Since C++20
51 : constexpr see below operator<=>(basic_string_view<charT, traits> x,
52 : basic_string_view<charT, traits> y) noexcept;
53 :
54 : // see below, sufficient additional overloads of comparison functions
55 :
56 : // 7.10, Inserters and extractors
57 : template<class charT, class traits>
58 : basic_ostream<charT, traits>&
59 : operator<<(basic_ostream<charT, traits>& os,
60 : basic_string_view<charT, traits> str);
61 :
62 : // basic_string_view typedef names
63 : typedef basic_string_view<char> string_view;
64 : typedef basic_string_view<char8_t> u8string_view; // C++20
65 : typedef basic_string_view<char16_t> u16string_view;
66 : typedef basic_string_view<char32_t> u32string_view;
67 : typedef basic_string_view<wchar_t> wstring_view;
68 :
69 : template<class charT, class traits = char_traits<charT>>
70 : class basic_string_view {
71 : public:
72 : // types
73 : typedef traits traits_type;
74 : typedef charT value_type;
75 : typedef charT* pointer;
76 : typedef const charT* const_pointer;
77 : typedef charT& reference;
78 : typedef const charT& const_reference;
79 : typedef implementation-defined const_iterator;
80 : typedef const_iterator iterator;
81 : typedef reverse_iterator<const_iterator> const_reverse_iterator;
82 : typedef const_reverse_iterator reverse_iterator;
83 : typedef size_t size_type;
84 : typedef ptrdiff_t difference_type;
85 : static constexpr size_type npos = size_type(-1);
86 :
87 : // 7.3, basic_string_view constructors and assignment operators
88 : constexpr basic_string_view() noexcept;
89 : constexpr basic_string_view(const basic_string_view&) noexcept = default;
90 : basic_string_view& operator=(const basic_string_view&) noexcept = default;
91 : template<class Allocator>
92 : constexpr basic_string_view(const charT* str);
93 : basic_string_view(nullptr_t) = delete; // C++2b
94 : constexpr basic_string_view(const charT* str, size_type len);
95 : template <class It, class End>
96 : constexpr basic_string_view(It begin, End end); // C++20
97 : template <class Range>
98 : constexpr basic_string_view(Range&& r); // C++23
99 :
100 : // 7.4, basic_string_view iterator support
101 : constexpr const_iterator begin() const noexcept;
102 : constexpr const_iterator end() const noexcept;
103 : constexpr const_iterator cbegin() const noexcept;
104 : constexpr const_iterator cend() const noexcept;
105 : const_reverse_iterator rbegin() const noexcept;
106 : const_reverse_iterator rend() const noexcept;
107 : const_reverse_iterator crbegin() const noexcept;
108 : const_reverse_iterator crend() const noexcept;
109 :
110 : // 7.5, basic_string_view capacity
111 : constexpr size_type size() const noexcept;
112 : constexpr size_type length() const noexcept;
113 : constexpr size_type max_size() const noexcept;
114 : constexpr bool empty() const noexcept;
115 :
116 : // 7.6, basic_string_view element access
117 : constexpr const_reference operator[](size_type pos) const;
118 : constexpr const_reference at(size_type pos) const;
119 : constexpr const_reference front() const;
120 : constexpr const_reference back() const;
121 : constexpr const_pointer data() const noexcept;
122 :
123 : // 7.7, basic_string_view modifiers
124 : constexpr void remove_prefix(size_type n);
125 : constexpr void remove_suffix(size_type n);
126 : constexpr void swap(basic_string_view& s) noexcept;
127 :
128 : size_type copy(charT* s, size_type n, size_type pos = 0) const; // constexpr in C++20
129 :
130 : constexpr basic_string_view substr(size_type pos = 0, size_type n = npos) const;
131 : constexpr int compare(basic_string_view s) const noexcept;
132 : constexpr int compare(size_type pos1, size_type n1, basic_string_view s) const;
133 : constexpr int compare(size_type pos1, size_type n1,
134 : basic_string_view s, size_type pos2, size_type n2) const;
135 : constexpr int compare(const charT* s) const;
136 : constexpr int compare(size_type pos1, size_type n1, const charT* s) const;
137 : constexpr int compare(size_type pos1, size_type n1,
138 : const charT* s, size_type n2) const;
139 : constexpr size_type find(basic_string_view s, size_type pos = 0) const noexcept;
140 : constexpr size_type find(charT c, size_type pos = 0) const noexcept;
141 : constexpr size_type find(const charT* s, size_type pos, size_type n) const noexcept; // noexcept as an extension
142 : constexpr size_type find(const charT* s, size_type pos = 0) const noexcept; // noexcept as an extension
143 : constexpr size_type rfind(basic_string_view s, size_type pos = npos) const noexcept;
144 : constexpr size_type rfind(charT c, size_type pos = npos) const noexcept;
145 : constexpr size_type rfind(const charT* s, size_type pos, size_type n) const noexcept; // noexcept as an extension
146 : constexpr size_type rfind(const charT* s, size_type pos = npos) const noexcept; // noexcept as an extension
147 : constexpr size_type find_first_of(basic_string_view s, size_type pos = 0) const noexcept;
148 : constexpr size_type find_first_of(charT c, size_type pos = 0) const noexcept;
149 : constexpr size_type find_first_of(const charT* s, size_type pos, size_type n) const noexcept; // noexcept as an extension
150 : constexpr size_type find_first_of(const charT* s, size_type pos = 0) const noexcept; // noexcept as an extension
151 : constexpr size_type find_last_of(basic_string_view s, size_type pos = npos) const noexcept;
152 : constexpr size_type find_last_of(charT c, size_type pos = npos) const noexcept;
153 : constexpr size_type find_last_of(const charT* s, size_type pos, size_type n) const noexcept; // noexcept as an extension
154 : constexpr size_type find_last_of(const charT* s, size_type pos = npos) const noexcept; // noexcept as an extension
155 : constexpr size_type find_first_not_of(basic_string_view s, size_type pos = 0) const noexcept;
156 : constexpr size_type find_first_not_of(charT c, size_type pos = 0) const noexcept;
157 : constexpr size_type find_first_not_of(const charT* s, size_type pos, size_type n) const noexcept; // noexcept as an extension
158 : constexpr size_type find_first_not_of(const charT* s, size_type pos = 0) const noexcept; // noexcept as an extension
159 : constexpr size_type find_last_not_of(basic_string_view s, size_type pos = npos) const noexcept;
160 : constexpr size_type find_last_not_of(charT c, size_type pos = npos) const noexcept;
161 : constexpr size_type find_last_not_of(const charT* s, size_type pos, size_type n) const noexcept; // noexcept as an extension
162 : constexpr size_type find_last_not_of(const charT* s, size_type pos = npos) const noexcept; // noexcept as an extension
163 :
164 : constexpr bool starts_with(basic_string_view s) const noexcept; // C++20
165 : constexpr bool starts_with(charT c) const noexcept; // C++20
166 : constexpr bool starts_with(const charT* s) const; // C++20
167 : constexpr bool ends_with(basic_string_view s) const noexcept; // C++20
168 : constexpr bool ends_with(charT c) const noexcept; // C++20
169 : constexpr bool ends_with(const charT* s) const; // C++20
170 :
171 : constexpr bool contains(basic_string_view s) const noexcept; // C++2b
172 : constexpr bool contains(charT c) const noexcept; // C++2b
173 : constexpr bool contains(const charT* s) const; // C++2b
174 :
175 : private:
176 : const_pointer data_; // exposition only
177 : size_type size_; // exposition only
178 : };
179 :
180 : // basic_string_view deduction guides
181 : template<class It, class End>
182 : basic_string_view(It, End) -> basic_string_view<iter_value_t<It>>; // C++20
183 : template<class Range>
184 : basic_string_view(Range&&) -> basic_string_view<ranges::range_value_t<Range>>; // C++23
185 :
186 : // 7.11, Hash support
187 : template <class T> struct hash;
188 : template <> struct hash<string_view>;
189 : template <> struct hash<u8string_view>; // C++20
190 : template <> struct hash<u16string_view>;
191 : template <> struct hash<u32string_view>;
192 : template <> struct hash<wstring_view>;
193 :
194 : constexpr basic_string_view<char> operator "" sv(const char *str, size_t len) noexcept;
195 : constexpr basic_string_view<wchar_t> operator "" sv(const wchar_t *str, size_t len) noexcept;
196 : constexpr basic_string_view<char8_t> operator "" sv(const char8_t *str, size_t len) noexcept; // C++20
197 : constexpr basic_string_view<char16_t> operator "" sv(const char16_t *str, size_t len) noexcept;
198 : constexpr basic_string_view<char32_t> operator "" sv(const char32_t *str, size_t len) noexcept;
199 :
200 : } // namespace std
201 :
202 :
203 : */
204 :
205 : #include <__algorithm/min.h>
206 : #include <__assert> // all public C++ headers provide the assertion handler
207 : #include <__config>
208 : #include <__functional/hash.h>
209 : #include <__functional/unary_function.h>
210 : #include <__fwd/string_view.h>
211 : #include <__iterator/concepts.h>
212 : #include <__iterator/readable_traits.h>
213 : #include <__iterator/reverse_iterator.h>
214 : #include <__memory/pointer_traits.h>
215 : #include <__ranges/concepts.h>
216 : #include <__ranges/data.h>
217 : #include <__ranges/enable_borrowed_range.h>
218 : #include <__ranges/enable_view.h>
219 : #include <__ranges/size.h>
220 : #include <__string/char_traits.h>
221 : #include <iosfwd>
222 : #include <limits>
223 : #include <stdexcept>
224 : #include <type_traits>
225 : #include <version>
226 :
227 : // standard-mandated includes
228 :
229 : // [iterator.range]
230 : #include <__iterator/access.h>
231 : #include <__iterator/data.h>
232 : #include <__iterator/empty.h>
233 : #include <__iterator/reverse_access.h>
234 : #include <__iterator/size.h>
235 :
236 : // [string.view.synop]
237 : #include <compare>
238 :
239 : #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
240 : # pragma GCC system_header
241 : #endif
242 :
243 : _LIBCPP_PUSH_MACROS
244 : #include <__undef_macros>
245 :
246 :
247 : _LIBCPP_BEGIN_NAMESPACE_STD
248 :
249 : // TODO: This is a workaround for some vendors to carry a downstream diff to accept `nullptr` in
250 : // string_view constructors. This can be refactored when this exact form isn't needed anymore.
251 : template <class _Traits>
252 : _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR
253 : inline size_t __char_traits_length_checked(const typename _Traits::char_type* __s) _NOEXCEPT {
254 : // This needs to be a single statement for C++11 constexpr
255 : return _LIBCPP_ASSERT(__s != nullptr, "null pointer passed to non-null argument of char_traits<...>::length"), _Traits::length(__s);
256 : }
257 :
258 : template<class _CharT, class _Traits>
259 : class basic_string_view {
260 : public:
261 : // types
262 : using traits_type = _Traits;
263 : using value_type = _CharT;
264 : using pointer = _CharT*;
265 : using const_pointer = const _CharT*;
266 : using reference = _CharT&;
267 : using const_reference = const _CharT&;
268 : using const_iterator = const_pointer; // See [string.view.iterators]
269 : using iterator = const_iterator;
270 : using const_reverse_iterator = _VSTD::reverse_iterator<const_iterator>;
271 : using reverse_iterator = const_reverse_iterator;
272 : using size_type = size_t;
273 : using difference_type = ptrdiff_t;
274 : static _LIBCPP_CONSTEXPR const size_type npos = -1; // size_type(-1);
275 :
276 : static_assert((!is_array<value_type>::value), "Character type of basic_string_view must not be an array");
277 : static_assert(( is_standard_layout<value_type>::value), "Character type of basic_string_view must be standard-layout");
278 : static_assert(( is_trivial<value_type>::value), "Character type of basic_string_view must be trivial");
279 : static_assert((is_same<_CharT, typename traits_type::char_type>::value),
280 : "traits_type::char_type must be the same type as CharT");
281 :
282 : // [string.view.cons], construct/copy
283 : _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
284 : basic_string_view() _NOEXCEPT : __data_(nullptr), __size_(0) {}
285 :
286 : _LIBCPP_INLINE_VISIBILITY
287 : basic_string_view(const basic_string_view&) _NOEXCEPT = default;
288 :
289 : _LIBCPP_INLINE_VISIBILITY
290 : basic_string_view& operator=(const basic_string_view&) _NOEXCEPT = default;
291 :
292 : _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
293 4625032 : basic_string_view(const _CharT* __s, size_type __len) _NOEXCEPT
294 2312516 : : __data_(__s), __size_(__len)
295 2312516 : {
296 : #if _LIBCPP_STD_VER > 11
297 : _LIBCPP_ASSERT(__len == 0 || __s != nullptr, "string_view::string_view(_CharT *, size_t): received nullptr");
298 : #endif
299 4625032 : }
300 :
301 : #if _LIBCPP_STD_VER > 17
302 : template <contiguous_iterator _It, sized_sentinel_for<_It> _End>
303 : requires (is_same_v<iter_value_t<_It>, _CharT> && !is_convertible_v<_End, size_type>)
304 : constexpr _LIBCPP_HIDE_FROM_ABI basic_string_view(_It __begin, _End __end)
305 : : __data_(_VSTD::to_address(__begin)), __size_(__end - __begin)
306 : {
307 : _LIBCPP_ASSERT((__end - __begin) >= 0, "std::string_view::string_view(iterator, sentinel) received invalid range");
308 : }
309 : #endif // _LIBCPP_STD_VER > 17
310 :
311 : #if _LIBCPP_STD_VER > 20
312 : template <class _Range>
313 : requires (
314 : !is_same_v<remove_cvref_t<_Range>, basic_string_view> &&
315 : ranges::contiguous_range<_Range> &&
316 : ranges::sized_range<_Range> &&
317 : is_same_v<ranges::range_value_t<_Range>, _CharT> &&
318 : !is_convertible_v<_Range, const _CharT*> &&
319 : (!requires(remove_cvref_t<_Range>& __d) {
320 : __d.operator _VSTD::basic_string_view<_CharT, _Traits>();
321 : }) &&
322 : (!requires {
323 : typename remove_reference_t<_Range>::traits_type;
324 : } || is_same_v<typename remove_reference_t<_Range>::traits_type, _Traits>)
325 : )
326 : constexpr explicit _LIBCPP_HIDE_FROM_ABI
327 : basic_string_view(_Range&& __r) : __data_(ranges::data(__r)), __size_(ranges::size(__r)) {}
328 : #endif // _LIBCPP_STD_VER > 20
329 :
330 : _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
331 : basic_string_view(const _CharT* __s)
332 : : __data_(__s), __size_(_VSTD::__char_traits_length_checked<_Traits>(__s)) {}
333 :
334 : #if _LIBCPP_STD_VER > 20
335 : basic_string_view(nullptr_t) = delete;
336 : #endif
337 :
338 : // [string.view.iterators], iterators
339 : _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
340 : const_iterator begin() const _NOEXCEPT { return cbegin(); }
341 :
342 : _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
343 : const_iterator end() const _NOEXCEPT { return cend(); }
344 :
345 : _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
346 : const_iterator cbegin() const _NOEXCEPT { return __data_; }
347 :
348 : _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
349 : const_iterator cend() const _NOEXCEPT { return __data_ + __size_; }
350 :
351 : _LIBCPP_CONSTEXPR_SINCE_CXX17 _LIBCPP_INLINE_VISIBILITY
352 : const_reverse_iterator rbegin() const _NOEXCEPT { return const_reverse_iterator(cend()); }
353 :
354 : _LIBCPP_CONSTEXPR_SINCE_CXX17 _LIBCPP_INLINE_VISIBILITY
355 : const_reverse_iterator rend() const _NOEXCEPT { return const_reverse_iterator(cbegin()); }
356 :
357 : _LIBCPP_CONSTEXPR_SINCE_CXX17 _LIBCPP_INLINE_VISIBILITY
358 : const_reverse_iterator crbegin() const _NOEXCEPT { return const_reverse_iterator(cend()); }
359 :
360 : _LIBCPP_CONSTEXPR_SINCE_CXX17 _LIBCPP_INLINE_VISIBILITY
361 : const_reverse_iterator crend() const _NOEXCEPT { return const_reverse_iterator(cbegin()); }
362 :
363 : // [string.view.capacity], capacity
364 : _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
365 2312516 : size_type size() const _NOEXCEPT { return __size_; }
366 :
367 : _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
368 : size_type length() const _NOEXCEPT { return __size_; }
369 :
370 : _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
371 : size_type max_size() const _NOEXCEPT { return numeric_limits<size_type>::max() / sizeof(value_type); }
372 :
373 : _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
374 : bool empty() const _NOEXCEPT { return __size_ == 0; }
375 :
376 : // [string.view.access], element access
377 : _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
378 : const_reference operator[](size_type __pos) const _NOEXCEPT {
379 : return _LIBCPP_ASSERT(__pos < size(), "string_view[] index out of bounds"), __data_[__pos];
380 : }
381 :
382 : _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
383 : const_reference at(size_type __pos) const
384 : {
385 : return __pos >= size()
386 : ? (__throw_out_of_range("string_view::at"), __data_[0])
387 : : __data_[__pos];
388 : }
389 :
390 : _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
391 : const_reference front() const _NOEXCEPT
392 : {
393 : return _LIBCPP_ASSERT(!empty(), "string_view::front(): string is empty"), __data_[0];
394 : }
395 :
396 : _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
397 : const_reference back() const _NOEXCEPT
398 : {
399 : return _LIBCPP_ASSERT(!empty(), "string_view::back(): string is empty"), __data_[__size_-1];
400 : }
401 :
402 : _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
403 2312516 : const_pointer data() const _NOEXCEPT { return __data_; }
404 :
405 : // [string.view.modifiers], modifiers:
406 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
407 : void remove_prefix(size_type __n) _NOEXCEPT
408 : {
409 : _LIBCPP_ASSERT(__n <= size(), "remove_prefix() can't remove more than size()");
410 : __data_ += __n;
411 : __size_ -= __n;
412 : }
413 :
414 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
415 : void remove_suffix(size_type __n) _NOEXCEPT
416 : {
417 : _LIBCPP_ASSERT(__n <= size(), "remove_suffix() can't remove more than size()");
418 : __size_ -= __n;
419 : }
420 :
421 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
422 : void swap(basic_string_view& __other) _NOEXCEPT
423 : {
424 : const value_type *__p = __data_;
425 : __data_ = __other.__data_;
426 : __other.__data_ = __p;
427 :
428 : size_type __sz = __size_;
429 : __size_ = __other.__size_;
430 : __other.__size_ = __sz;
431 : }
432 :
433 : _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
434 : size_type copy(_CharT* __s, size_type __n, size_type __pos = 0) const
435 : {
436 : if (__pos > size())
437 : __throw_out_of_range("string_view::copy");
438 : size_type __rlen = _VSTD::min(__n, size() - __pos);
439 : _Traits::copy(__s, data() + __pos, __rlen);
440 : return __rlen;
441 : }
442 :
443 : _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
444 : basic_string_view substr(size_type __pos = 0, size_type __n = npos) const
445 : {
446 : return __pos > size()
447 : ? (__throw_out_of_range("string_view::substr"), basic_string_view())
448 : : basic_string_view(data() + __pos, _VSTD::min(__n, size() - __pos));
449 : }
450 :
451 : _LIBCPP_CONSTEXPR_SINCE_CXX14 int compare(basic_string_view __sv) const _NOEXCEPT
452 : {
453 : size_type __rlen = _VSTD::min(size(), __sv.size());
454 : int __retval = _Traits::compare(data(), __sv.data(), __rlen);
455 : if (__retval == 0) // first __rlen chars matched
456 : __retval = size() == __sv.size() ? 0 : (size() < __sv.size() ? -1 : 1);
457 : return __retval;
458 : }
459 :
460 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
461 : int compare(size_type __pos1, size_type __n1, basic_string_view __sv) const
462 : {
463 : return substr(__pos1, __n1).compare(__sv);
464 : }
465 :
466 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
467 : int compare( size_type __pos1, size_type __n1,
468 : basic_string_view __sv, size_type __pos2, size_type __n2) const
469 : {
470 : return substr(__pos1, __n1).compare(__sv.substr(__pos2, __n2));
471 : }
472 :
473 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
474 : int compare(const _CharT* __s) const _NOEXCEPT
475 : {
476 : return compare(basic_string_view(__s));
477 : }
478 :
479 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
480 : int compare(size_type __pos1, size_type __n1, const _CharT* __s) const
481 : {
482 : return substr(__pos1, __n1).compare(basic_string_view(__s));
483 : }
484 :
485 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
486 : int compare(size_type __pos1, size_type __n1, const _CharT* __s, size_type __n2) const
487 : {
488 : return substr(__pos1, __n1).compare(basic_string_view(__s, __n2));
489 : }
490 :
491 : // find
492 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
493 : size_type find(basic_string_view __s, size_type __pos = 0) const _NOEXCEPT
494 : {
495 : _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find(): received nullptr");
496 : return std::__str_find<value_type, size_type, traits_type, npos>
497 : (data(), size(), __s.data(), __pos, __s.size());
498 : }
499 :
500 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
501 : size_type find(_CharT __c, size_type __pos = 0) const _NOEXCEPT
502 : {
503 : return std::__str_find<value_type, size_type, traits_type, npos>
504 : (data(), size(), __c, __pos);
505 : }
506 :
507 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
508 : size_type find(const _CharT* __s, size_type __pos, size_type __n) const _NOEXCEPT
509 : {
510 : _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find(): received nullptr");
511 : return std::__str_find<value_type, size_type, traits_type, npos>
512 : (data(), size(), __s, __pos, __n);
513 : }
514 :
515 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
516 : size_type find(const _CharT* __s, size_type __pos = 0) const _NOEXCEPT
517 : {
518 : _LIBCPP_ASSERT(__s != nullptr, "string_view::find(): received nullptr");
519 : return std::__str_find<value_type, size_type, traits_type, npos>
520 : (data(), size(), __s, __pos, traits_type::length(__s));
521 : }
522 :
523 : // rfind
524 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
525 : size_type rfind(basic_string_view __s, size_type __pos = npos) const _NOEXCEPT
526 : {
527 : _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find(): received nullptr");
528 : return std::__str_rfind<value_type, size_type, traits_type, npos>
529 : (data(), size(), __s.data(), __pos, __s.size());
530 : }
531 :
532 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
533 : size_type rfind(_CharT __c, size_type __pos = npos) const _NOEXCEPT
534 : {
535 : return std::__str_rfind<value_type, size_type, traits_type, npos>
536 : (data(), size(), __c, __pos);
537 : }
538 :
539 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
540 : size_type rfind(const _CharT* __s, size_type __pos, size_type __n) const _NOEXCEPT
541 : {
542 : _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::rfind(): received nullptr");
543 : return std::__str_rfind<value_type, size_type, traits_type, npos>
544 : (data(), size(), __s, __pos, __n);
545 : }
546 :
547 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
548 : size_type rfind(const _CharT* __s, size_type __pos=npos) const _NOEXCEPT
549 : {
550 : _LIBCPP_ASSERT(__s != nullptr, "string_view::rfind(): received nullptr");
551 : return std::__str_rfind<value_type, size_type, traits_type, npos>
552 : (data(), size(), __s, __pos, traits_type::length(__s));
553 : }
554 :
555 : // find_first_of
556 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
557 : size_type find_first_of(basic_string_view __s, size_type __pos = 0) const _NOEXCEPT
558 : {
559 : _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_first_of(): received nullptr");
560 : return std::__str_find_first_of<value_type, size_type, traits_type, npos>
561 : (data(), size(), __s.data(), __pos, __s.size());
562 : }
563 :
564 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
565 : size_type find_first_of(_CharT __c, size_type __pos = 0) const _NOEXCEPT
566 : { return find(__c, __pos); }
567 :
568 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
569 : size_type find_first_of(const _CharT* __s, size_type __pos, size_type __n) const _NOEXCEPT
570 : {
571 : _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_first_of(): received nullptr");
572 : return std::__str_find_first_of<value_type, size_type, traits_type, npos>
573 : (data(), size(), __s, __pos, __n);
574 : }
575 :
576 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
577 : size_type find_first_of(const _CharT* __s, size_type __pos=0) const _NOEXCEPT
578 : {
579 : _LIBCPP_ASSERT(__s != nullptr, "string_view::find_first_of(): received nullptr");
580 : return std::__str_find_first_of<value_type, size_type, traits_type, npos>
581 : (data(), size(), __s, __pos, traits_type::length(__s));
582 : }
583 :
584 : // find_last_of
585 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
586 : size_type find_last_of(basic_string_view __s, size_type __pos=npos) const _NOEXCEPT
587 : {
588 : _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_last_of(): received nullptr");
589 : return std::__str_find_last_of<value_type, size_type, traits_type, npos>
590 : (data(), size(), __s.data(), __pos, __s.size());
591 : }
592 :
593 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
594 : size_type find_last_of(_CharT __c, size_type __pos = npos) const _NOEXCEPT
595 : { return rfind(__c, __pos); }
596 :
597 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
598 : size_type find_last_of(const _CharT* __s, size_type __pos, size_type __n) const _NOEXCEPT
599 : {
600 : _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_last_of(): received nullptr");
601 : return std::__str_find_last_of<value_type, size_type, traits_type, npos>
602 : (data(), size(), __s, __pos, __n);
603 : }
604 :
605 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
606 : size_type find_last_of(const _CharT* __s, size_type __pos=npos) const _NOEXCEPT
607 : {
608 : _LIBCPP_ASSERT(__s != nullptr, "string_view::find_last_of(): received nullptr");
609 : return std::__str_find_last_of<value_type, size_type, traits_type, npos>
610 : (data(), size(), __s, __pos, traits_type::length(__s));
611 : }
612 :
613 : // find_first_not_of
614 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
615 : size_type find_first_not_of(basic_string_view __s, size_type __pos=0) const _NOEXCEPT
616 : {
617 : _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_first_not_of(): received nullptr");
618 : return std::__str_find_first_not_of<value_type, size_type, traits_type, npos>
619 : (data(), size(), __s.data(), __pos, __s.size());
620 : }
621 :
622 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
623 : size_type find_first_not_of(_CharT __c, size_type __pos=0) const _NOEXCEPT
624 : {
625 : return std::__str_find_first_not_of<value_type, size_type, traits_type, npos>
626 : (data(), size(), __c, __pos);
627 : }
628 :
629 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
630 : size_type find_first_not_of(const _CharT* __s, size_type __pos, size_type __n) const _NOEXCEPT
631 : {
632 : _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_first_not_of(): received nullptr");
633 : return std::__str_find_first_not_of<value_type, size_type, traits_type, npos>
634 : (data(), size(), __s, __pos, __n);
635 : }
636 :
637 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
638 : size_type find_first_not_of(const _CharT* __s, size_type __pos=0) const _NOEXCEPT
639 : {
640 : _LIBCPP_ASSERT(__s != nullptr, "string_view::find_first_not_of(): received nullptr");
641 : return std::__str_find_first_not_of<value_type, size_type, traits_type, npos>
642 : (data(), size(), __s, __pos, traits_type::length(__s));
643 : }
644 :
645 : // find_last_not_of
646 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
647 : size_type find_last_not_of(basic_string_view __s, size_type __pos=npos) const _NOEXCEPT
648 : {
649 : _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_last_not_of(): received nullptr");
650 : return std::__str_find_last_not_of<value_type, size_type, traits_type, npos>
651 : (data(), size(), __s.data(), __pos, __s.size());
652 : }
653 :
654 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
655 : size_type find_last_not_of(_CharT __c, size_type __pos=npos) const _NOEXCEPT
656 : {
657 : return std::__str_find_last_not_of<value_type, size_type, traits_type, npos>
658 : (data(), size(), __c, __pos);
659 : }
660 :
661 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
662 : size_type find_last_not_of(const _CharT* __s, size_type __pos, size_type __n) const _NOEXCEPT
663 : {
664 : _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_last_not_of(): received nullptr");
665 : return std::__str_find_last_not_of<value_type, size_type, traits_type, npos>
666 : (data(), size(), __s, __pos, __n);
667 : }
668 :
669 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
670 : size_type find_last_not_of(const _CharT* __s, size_type __pos=npos) const _NOEXCEPT
671 : {
672 : _LIBCPP_ASSERT(__s != nullptr, "string_view::find_last_not_of(): received nullptr");
673 : return std::__str_find_last_not_of<value_type, size_type, traits_type, npos>
674 : (data(), size(), __s, __pos, traits_type::length(__s));
675 : }
676 :
677 : #if _LIBCPP_STD_VER > 17
678 : constexpr _LIBCPP_INLINE_VISIBILITY
679 : bool starts_with(basic_string_view __s) const noexcept
680 : { return size() >= __s.size() && compare(0, __s.size(), __s) == 0; }
681 :
682 : constexpr _LIBCPP_INLINE_VISIBILITY
683 : bool starts_with(value_type __c) const noexcept
684 : { return !empty() && _Traits::eq(front(), __c); }
685 :
686 : constexpr _LIBCPP_INLINE_VISIBILITY
687 : bool starts_with(const value_type* __s) const noexcept
688 : { return starts_with(basic_string_view(__s)); }
689 :
690 : constexpr _LIBCPP_INLINE_VISIBILITY
691 : bool ends_with(basic_string_view __s) const noexcept
692 : { return size() >= __s.size() && compare(size() - __s.size(), npos, __s) == 0; }
693 :
694 : constexpr _LIBCPP_INLINE_VISIBILITY
695 : bool ends_with(value_type __c) const noexcept
696 : { return !empty() && _Traits::eq(back(), __c); }
697 :
698 : constexpr _LIBCPP_INLINE_VISIBILITY
699 : bool ends_with(const value_type* __s) const noexcept
700 : { return ends_with(basic_string_view(__s)); }
701 : #endif
702 :
703 : #if _LIBCPP_STD_VER > 20
704 : constexpr _LIBCPP_INLINE_VISIBILITY
705 : bool contains(basic_string_view __sv) const noexcept
706 : { return find(__sv) != npos; }
707 :
708 : constexpr _LIBCPP_INLINE_VISIBILITY
709 : bool contains(value_type __c) const noexcept
710 : { return find(__c) != npos; }
711 :
712 : constexpr _LIBCPP_INLINE_VISIBILITY
713 : bool contains(const value_type* __s) const
714 : { return find(__s) != npos; }
715 : #endif
716 :
717 : private:
718 : const value_type* __data_;
719 : size_type __size_;
720 : };
721 : _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(basic_string_view);
722 :
723 : #if _LIBCPP_STD_VER > 17
724 : template <class _CharT, class _Traits>
725 : inline constexpr bool ranges::enable_view<basic_string_view<_CharT, _Traits>> = true;
726 :
727 : template <class _CharT, class _Traits>
728 : inline constexpr bool ranges::enable_borrowed_range<basic_string_view<_CharT, _Traits> > = true;
729 : #endif // _LIBCPP_STD_VER > 17
730 :
731 : // [string.view.deduct]
732 :
733 : #if _LIBCPP_STD_VER > 17
734 : template <contiguous_iterator _It, sized_sentinel_for<_It> _End>
735 : basic_string_view(_It, _End) -> basic_string_view<iter_value_t<_It>>;
736 : #endif // _LIBCPP_STD_VER > 17
737 :
738 :
739 : #if _LIBCPP_STD_VER > 20
740 : template <ranges::contiguous_range _Range>
741 : basic_string_view(_Range) -> basic_string_view<ranges::range_value_t<_Range>>;
742 : #endif
743 :
744 : // [string.view.comparison]
745 : // operator ==
746 : template<class _CharT, class _Traits>
747 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
748 : bool operator==(basic_string_view<_CharT, _Traits> __lhs,
749 : basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
750 : {
751 : if (__lhs.size() != __rhs.size()) return false;
752 : return __lhs.compare(__rhs) == 0;
753 : }
754 :
755 : // The dummy default template parameters are used to work around a MSVC issue with mangling, see VSO-409326 for details.
756 : // This applies to the other sufficient overloads below for the other comparison operators.
757 : template<class _CharT, class _Traits, int = 1>
758 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
759 : bool operator==(basic_string_view<_CharT, _Traits> __lhs,
760 : __type_identity_t<basic_string_view<_CharT, _Traits> > __rhs) _NOEXCEPT
761 : {
762 : if (__lhs.size() != __rhs.size()) return false;
763 : return __lhs.compare(__rhs) == 0;
764 : }
765 :
766 : #if _LIBCPP_STD_VER < 20
767 : // This overload is automatically generated in C++20.
768 : template<class _CharT, class _Traits, int = 2>
769 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
770 : bool operator==(__type_identity_t<basic_string_view<_CharT, _Traits> > __lhs,
771 : basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
772 : {
773 : if (__lhs.size() != __rhs.size()) return false;
774 : return __lhs.compare(__rhs) == 0;
775 : }
776 : #endif // _LIBCPP_STD_VER > 17
777 :
778 : // operator <=>
779 :
780 : #if _LIBCPP_STD_VER > 17
781 :
782 : template <class _CharT, class _Traits>
783 : _LIBCPP_HIDE_FROM_ABI constexpr auto
784 : operator<=>(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) noexcept {
785 : if constexpr (requires { typename _Traits::comparison_category; }) {
786 : // [string.view]/4
787 : static_assert(
788 : __comparison_category<typename _Traits::comparison_category>,
789 : "return type is not a comparison category type");
790 : return static_cast<typename _Traits::comparison_category>(__lhs.compare(__rhs) <=> 0);
791 : } else {
792 : return static_cast<weak_ordering>(__lhs.compare(__rhs) <=> 0);
793 : }
794 : }
795 :
796 : template <class _CharT, class _Traits, int = 1>
797 : _LIBCPP_HIDE_FROM_ABI constexpr auto operator<=>(
798 : basic_string_view<_CharT, _Traits> __lhs, type_identity_t<basic_string_view<_CharT, _Traits>> __rhs) noexcept {
799 : if constexpr (requires { typename _Traits::comparison_category; }) {
800 : // [string.view]/4
801 : static_assert(
802 : __comparison_category<typename _Traits::comparison_category>,
803 : "return type is not a comparison category type");
804 : return static_cast<typename _Traits::comparison_category>(__lhs.compare(__rhs) <=> 0);
805 : } else {
806 : return static_cast<weak_ordering>(__lhs.compare(__rhs) <=> 0);
807 : }
808 : }
809 :
810 : #else // _LIBCPP_STD_VER > 17
811 :
812 : // operator !=
813 : template<class _CharT, class _Traits>
814 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
815 : bool operator!=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
816 : {
817 : if (__lhs.size() != __rhs.size())
818 : return true;
819 : return __lhs.compare(__rhs) != 0;
820 : }
821 :
822 : template<class _CharT, class _Traits, int = 1>
823 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
824 : bool operator!=(basic_string_view<_CharT, _Traits> __lhs,
825 : __type_identity_t<basic_string_view<_CharT, _Traits> > __rhs) _NOEXCEPT
826 : {
827 : if (__lhs.size() != __rhs.size())
828 : return true;
829 : return __lhs.compare(__rhs) != 0;
830 : }
831 :
832 : template<class _CharT, class _Traits, int = 2>
833 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
834 : bool operator!=(__type_identity_t<basic_string_view<_CharT, _Traits> > __lhs,
835 : basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
836 : {
837 : if (__lhs.size() != __rhs.size())
838 : return true;
839 : return __lhs.compare(__rhs) != 0;
840 : }
841 :
842 :
843 : // operator <
844 : template<class _CharT, class _Traits>
845 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
846 : bool operator<(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
847 : {
848 : return __lhs.compare(__rhs) < 0;
849 : }
850 :
851 : template<class _CharT, class _Traits, int = 1>
852 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
853 : bool operator<(basic_string_view<_CharT, _Traits> __lhs,
854 : __type_identity_t<basic_string_view<_CharT, _Traits> > __rhs) _NOEXCEPT
855 : {
856 : return __lhs.compare(__rhs) < 0;
857 : }
858 :
859 : template<class _CharT, class _Traits, int = 2>
860 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
861 : bool operator<(__type_identity_t<basic_string_view<_CharT, _Traits> > __lhs,
862 : basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
863 : {
864 : return __lhs.compare(__rhs) < 0;
865 : }
866 :
867 :
868 : // operator >
869 : template<class _CharT, class _Traits>
870 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
871 : bool operator> (basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
872 : {
873 : return __lhs.compare(__rhs) > 0;
874 : }
875 :
876 : template<class _CharT, class _Traits, int = 1>
877 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
878 : bool operator>(basic_string_view<_CharT, _Traits> __lhs,
879 : __type_identity_t<basic_string_view<_CharT, _Traits> > __rhs) _NOEXCEPT
880 : {
881 : return __lhs.compare(__rhs) > 0;
882 : }
883 :
884 : template<class _CharT, class _Traits, int = 2>
885 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
886 : bool operator>(__type_identity_t<basic_string_view<_CharT, _Traits> > __lhs,
887 : basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
888 : {
889 : return __lhs.compare(__rhs) > 0;
890 : }
891 :
892 :
893 : // operator <=
894 : template<class _CharT, class _Traits>
895 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
896 : bool operator<=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
897 : {
898 : return __lhs.compare(__rhs) <= 0;
899 : }
900 :
901 : template<class _CharT, class _Traits, int = 1>
902 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
903 : bool operator<=(basic_string_view<_CharT, _Traits> __lhs,
904 : __type_identity_t<basic_string_view<_CharT, _Traits> > __rhs) _NOEXCEPT
905 : {
906 : return __lhs.compare(__rhs) <= 0;
907 : }
908 :
909 : template<class _CharT, class _Traits, int = 2>
910 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
911 : bool operator<=(__type_identity_t<basic_string_view<_CharT, _Traits> > __lhs,
912 : basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
913 : {
914 : return __lhs.compare(__rhs) <= 0;
915 : }
916 :
917 :
918 : // operator >=
919 : template<class _CharT, class _Traits>
920 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
921 : bool operator>=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
922 : {
923 : return __lhs.compare(__rhs) >= 0;
924 : }
925 :
926 :
927 : template<class _CharT, class _Traits, int = 1>
928 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
929 : bool operator>=(basic_string_view<_CharT, _Traits> __lhs,
930 : __type_identity_t<basic_string_view<_CharT, _Traits> > __rhs) _NOEXCEPT
931 : {
932 : return __lhs.compare(__rhs) >= 0;
933 : }
934 :
935 : template<class _CharT, class _Traits, int = 2>
936 : _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_INLINE_VISIBILITY
937 : bool operator>=(__type_identity_t<basic_string_view<_CharT, _Traits> > __lhs,
938 : basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
939 : {
940 : return __lhs.compare(__rhs) >= 0;
941 : }
942 :
943 : #endif // _LIBCPP_STD_VER > 17
944 :
945 : template<class _CharT, class _Traits>
946 : _LIBCPP_HIDE_FROM_ABI basic_ostream<_CharT, _Traits>&
947 : operator<<(basic_ostream<_CharT, _Traits>& __os,
948 : basic_string_view<_CharT, _Traits> __str);
949 :
950 : // [string.view.hash]
951 : template<class _CharT>
952 : struct __string_view_hash : public __unary_function<basic_string_view<_CharT, char_traits<_CharT> >, size_t>
953 : {
954 : _LIBCPP_INLINE_VISIBILITY
955 : size_t operator()(const basic_string_view<_CharT, char_traits<_CharT> > __val) const _NOEXCEPT {
956 : return std::__do_string_hash(__val.data(), __val.data() + __val.size());
957 : }
958 : };
959 :
960 : template <>
961 : struct hash<basic_string_view<char, char_traits<char> > > : __string_view_hash<char> {};
962 :
963 : #ifndef _LIBCPP_HAS_NO_CHAR8_T
964 : template <>
965 : struct hash<basic_string_view<char8_t, char_traits<char8_t> > > : __string_view_hash<char8_t> {};
966 : #endif
967 :
968 : template <>
969 : struct hash<basic_string_view<char16_t, char_traits<char16_t> > > : __string_view_hash<char16_t> {};
970 :
971 : template <>
972 : struct hash<basic_string_view<char32_t, char_traits<char32_t> > > : __string_view_hash<char32_t> {};
973 :
974 : #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
975 : template <>
976 : struct hash<basic_string_view<wchar_t, char_traits<wchar_t> > > : __string_view_hash<wchar_t> {};
977 : #endif
978 :
979 : #if _LIBCPP_STD_VER > 11
980 : inline namespace literals
981 : {
982 : inline namespace string_view_literals
983 : {
984 : inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
985 : basic_string_view<char> operator "" sv(const char *__str, size_t __len) _NOEXCEPT
986 : {
987 : return basic_string_view<char> (__str, __len);
988 : }
989 :
990 : #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
991 : inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
992 : basic_string_view<wchar_t> operator "" sv(const wchar_t *__str, size_t __len) _NOEXCEPT
993 : {
994 : return basic_string_view<wchar_t> (__str, __len);
995 : }
996 : #endif
997 :
998 : #ifndef _LIBCPP_HAS_NO_CHAR8_T
999 : inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
1000 : basic_string_view<char8_t> operator "" sv(const char8_t *__str, size_t __len) _NOEXCEPT
1001 : {
1002 : return basic_string_view<char8_t> (__str, __len);
1003 : }
1004 : #endif
1005 :
1006 : inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
1007 : basic_string_view<char16_t> operator "" sv(const char16_t *__str, size_t __len) _NOEXCEPT
1008 : {
1009 : return basic_string_view<char16_t> (__str, __len);
1010 : }
1011 :
1012 : inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
1013 : basic_string_view<char32_t> operator "" sv(const char32_t *__str, size_t __len) _NOEXCEPT
1014 : {
1015 : return basic_string_view<char32_t> (__str, __len);
1016 : }
1017 : } // namespace string_view_literals
1018 : } // namespace literals
1019 : #endif
1020 : _LIBCPP_END_NAMESPACE_STD
1021 :
1022 : _LIBCPP_POP_MACROS
1023 :
1024 : #if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
1025 : # include <algorithm>
1026 : # include <concepts>
1027 : # include <functional>
1028 : # include <iterator>
1029 : #endif
1030 :
1031 : #endif // _LIBCPP_STRING_VIEW
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