2 //===------------------------ string_view ---------------------------------===//
4 // The LLVM Compiler Infrastructure
6 // This file is distributed under the University of Illinois Open Source
7 // License. See LICENSE.TXT for details.
9 //===----------------------------------------------------------------------===//
11 #ifndef _LIBCPP_STRING_VIEW
12 #define _LIBCPP_STRING_VIEW
19 // 7.2, Class template basic_string_view
20 template<class charT, class traits = char_traits<charT>>
21 class basic_string_view;
23 // 7.9, basic_string_view non-member comparison functions
24 template<class charT, class traits>
25 constexpr bool operator==(basic_string_view<charT, traits> x,
26 basic_string_view<charT, traits> y) noexcept;
27 template<class charT, class traits>
28 constexpr bool operator!=(basic_string_view<charT, traits> x,
29 basic_string_view<charT, traits> y) noexcept;
30 template<class charT, class traits>
31 constexpr bool operator< (basic_string_view<charT, traits> x,
32 basic_string_view<charT, traits> y) noexcept;
33 template<class charT, class traits>
34 constexpr bool operator> (basic_string_view<charT, traits> x,
35 basic_string_view<charT, traits> y) noexcept;
36 template<class charT, class traits>
37 constexpr bool operator<=(basic_string_view<charT, traits> x,
38 basic_string_view<charT, traits> y) noexcept;
39 template<class charT, class traits>
40 constexpr bool operator>=(basic_string_view<charT, traits> x,
41 basic_string_view<charT, traits> y) noexcept;
42 // see below, sufficient additional overloads of comparison functions
44 // 7.10, Inserters and extractors
45 template<class charT, class traits>
46 basic_ostream<charT, traits>&
47 operator<<(basic_ostream<charT, traits>& os,
48 basic_string_view<charT, traits> str);
50 // basic_string_view typedef names
51 typedef basic_string_view<char> string_view;
52 typedef basic_string_view<char16_t> u16string_view;
53 typedef basic_string_view<char32_t> u32string_view;
54 typedef basic_string_view<wchar_t> wstring_view;
56 template<class charT, class traits = char_traits<charT>>
57 class basic_string_view {
60 typedef traits traits_type;
61 typedef charT value_type;
62 typedef charT* pointer;
63 typedef const charT* const_pointer;
64 typedef charT& reference;
65 typedef const charT& const_reference;
66 typedef implementation-defined const_iterator;
67 typedef const_iterator iterator;
68 typedef reverse_iterator<const_iterator> const_reverse_iterator;
69 typedef const_reverse_iterator reverse_iterator;
70 typedef size_t size_type;
71 typedef ptrdiff_t difference_type;
72 static constexpr size_type npos = size_type(-1);
74 // 7.3, basic_string_view constructors and assignment operators
75 constexpr basic_string_view() noexcept;
76 constexpr basic_string_view(const basic_string_view&) noexcept = default;
77 basic_string_view& operator=(const basic_string_view&) noexcept = default;
78 template<class Allocator>
79 constexpr basic_string_view(const charT* str);
80 constexpr basic_string_view(const charT* str, size_type len);
82 // 7.4, basic_string_view iterator support
83 constexpr const_iterator begin() const noexcept;
84 constexpr const_iterator end() const noexcept;
85 constexpr const_iterator cbegin() const noexcept;
86 constexpr const_iterator cend() const noexcept;
87 const_reverse_iterator rbegin() const noexcept;
88 const_reverse_iterator rend() const noexcept;
89 const_reverse_iterator crbegin() const noexcept;
90 const_reverse_iterator crend() const noexcept;
92 // 7.5, basic_string_view capacity
93 constexpr size_type size() const noexcept;
94 constexpr size_type length() const noexcept;
95 constexpr size_type max_size() const noexcept;
96 constexpr bool empty() const noexcept;
98 // 7.6, basic_string_view element access
99 constexpr const_reference operator[](size_type pos) const;
100 constexpr const_reference at(size_type pos) const;
101 constexpr const_reference front() const;
102 constexpr const_reference back() const;
103 constexpr const_pointer data() const noexcept;
105 // 7.7, basic_string_view modifiers
106 constexpr void clear() noexcept;
107 constexpr void remove_prefix(size_type n);
108 constexpr void remove_suffix(size_type n);
109 constexpr void swap(basic_string_view& s) noexcept;
111 size_type copy(charT* s, size_type n, size_type pos = 0) const;
113 constexpr basic_string_view substr(size_type pos = 0, size_type n = npos) const;
114 constexpr int compare(basic_string_view s) const noexcept;
115 constexpr int compare(size_type pos1, size_type n1, basic_string_view s) const;
116 constexpr int compare(size_type pos1, size_type n1,
117 basic_string_view s, size_type pos2, size_type n2) const;
118 constexpr int compare(const charT* s) const;
119 constexpr int compare(size_type pos1, size_type n1, const charT* s) const;
120 constexpr int compare(size_type pos1, size_type n1,
121 const charT* s, size_type n2) const;
122 constexpr size_type find(basic_string_view s, size_type pos = 0) const noexcept;
123 constexpr size_type find(charT c, size_type pos = 0) const noexcept;
124 constexpr size_type find(const charT* s, size_type pos, size_type n) const;
125 constexpr size_type find(const charT* s, size_type pos = 0) const;
126 constexpr size_type rfind(basic_string_view s, size_type pos = npos) const noexcept;
127 constexpr size_type rfind(charT c, size_type pos = npos) const noexcept;
128 constexpr size_type rfind(const charT* s, size_type pos, size_type n) const;
129 constexpr size_type rfind(const charT* s, size_type pos = npos) const;
130 constexpr size_type find_first_of(basic_string_view s, size_type pos = 0) const noexcept;
131 constexpr size_type find_first_of(charT c, size_type pos = 0) const noexcept;
132 constexpr size_type find_first_of(const charT* s, size_type pos, size_type n) const;
133 constexpr size_type find_first_of(const charT* s, size_type pos = 0) const;
134 constexpr size_type find_last_of(basic_string_view s, size_type pos = npos) const noexcept;
135 constexpr size_type find_last_of(charT c, size_type pos = npos) const noexcept;
136 constexpr size_type find_last_of(const charT* s, size_type pos, size_type n) const;
137 constexpr size_type find_last_of(const charT* s, size_type pos = npos) const;
138 constexpr size_type find_first_not_of(basic_string_view s, size_type pos = 0) const noexcept;
139 constexpr size_type find_first_not_of(charT c, size_type pos = 0) const noexcept;
140 constexpr size_type find_first_not_of(const charT* s, size_type pos, size_type n) const;
141 constexpr size_type find_first_not_of(const charT* s, size_type pos = 0) const;
142 constexpr size_type find_last_not_of(basic_string_view s, size_type pos = npos) const noexcept;
143 constexpr size_type find_last_not_of(charT c, size_type pos = npos) const noexcept;
144 constexpr size_type find_last_not_of(const charT* s, size_type pos, size_type n) const;
145 constexpr size_type find_last_not_of(const charT* s, size_type pos = npos) const;
148 const_pointer data_; // exposition only
149 size_type size_; // exposition only
152 // 7.11, Hash support
153 template <class T> struct hash;
154 template <> struct hash<string_view>;
155 template <> struct hash<u16string_view>;
156 template <> struct hash<u32string_view>;
157 template <> struct hash<wstring_view>;
159 constexpr basic_string<char> operator "" s( const char *str, size_t len ); // C++17
160 constexpr basic_string<wchar_t> operator "" s( const wchar_t *str, size_t len ); // C++17
161 constexpr basic_string<char16_t> operator "" s( const char16_t *str, size_t len ); // C++17
162 constexpr basic_string<char32_t> operator "" s( const char32_t *str, size_t len ); // C++17
178 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
179 #pragma GCC system_header
182 _LIBCPP_BEGIN_NAMESPACE_STD
184 template<class _CharT, class _Traits = char_traits<_CharT> >
185 class _LIBCPP_TEMPLATE_VIS basic_string_view {
188 typedef _Traits traits_type;
189 typedef _CharT value_type;
190 typedef const _CharT* pointer;
191 typedef const _CharT* const_pointer;
192 typedef const _CharT& reference;
193 typedef const _CharT& const_reference;
194 typedef const_pointer const_iterator; // See [string.view.iterators]
195 typedef const_iterator iterator;
196 typedef _VSTD::reverse_iterator<const_iterator> const_reverse_iterator;
197 typedef const_reverse_iterator reverse_iterator;
198 typedef size_t size_type;
199 typedef ptrdiff_t difference_type;
200 static _LIBCPP_CONSTEXPR const size_type npos = -1; // size_type(-1);
202 // [string.view.cons], construct/copy
203 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
204 basic_string_view() _NOEXCEPT : __data (nullptr), __size(0) {}
206 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
207 basic_string_view(const basic_string_view&) _NOEXCEPT = default;
209 _LIBCPP_INLINE_VISIBILITY
210 basic_string_view& operator=(const basic_string_view&) _NOEXCEPT = default;
212 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
213 basic_string_view(const _CharT* __s, size_type __len)
214 : __data(__s), __size(__len)
216 // #if _LIBCPP_STD_VER > 11
217 // _LIBCPP_ASSERT(__len == 0 || __s != nullptr, "string_view::string_view(_CharT *, size_t): received nullptr");
221 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
222 basic_string_view(const _CharT* __s)
223 : __data(__s), __size(_Traits::length(__s)) {}
225 // [string.view.iterators], iterators
226 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
227 const_iterator begin() const _NOEXCEPT { return cbegin(); }
229 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
230 const_iterator end() const _NOEXCEPT { return cend(); }
232 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
233 const_iterator cbegin() const _NOEXCEPT { return __data; }
235 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
236 const_iterator cend() const _NOEXCEPT { return __data + __size; }
238 _LIBCPP_INLINE_VISIBILITY
239 const_reverse_iterator rbegin() const _NOEXCEPT { return const_reverse_iterator(cend()); }
241 _LIBCPP_INLINE_VISIBILITY
242 const_reverse_iterator rend() const _NOEXCEPT { return const_reverse_iterator(cbegin()); }
244 _LIBCPP_INLINE_VISIBILITY
245 const_reverse_iterator crbegin() const _NOEXCEPT { return const_reverse_iterator(cend()); }
247 _LIBCPP_INLINE_VISIBILITY
248 const_reverse_iterator crend() const _NOEXCEPT { return const_reverse_iterator(cbegin()); }
250 // [string.view.capacity], capacity
251 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
252 size_type size() const _NOEXCEPT { return __size; }
254 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
255 size_type length() const _NOEXCEPT { return __size; }
257 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
258 size_type max_size() const _NOEXCEPT { return numeric_limits<size_type>::max(); }
260 _LIBCPP_CONSTEXPR bool _LIBCPP_INLINE_VISIBILITY
261 empty() const _NOEXCEPT { return __size == 0; }
263 // [string.view.access], element access
264 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
265 const_reference operator[](size_type __pos) const _NOEXCEPT { return __data[__pos]; }
267 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
268 const_reference at(size_type __pos) const
270 return __pos >= size()
271 ? (__throw_out_of_range("string_view::at"), __data[0])
275 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
276 const_reference front() const
278 return _LIBCPP_ASSERT(!empty(), "string_view::front(): string is empty"), __data[0];
281 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
282 const_reference back() const
284 return _LIBCPP_ASSERT(!empty(), "string_view::back(): string is empty"), __data[__size-1];
287 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
288 const_pointer data() const _NOEXCEPT { return __data; }
290 // [string.view.modifiers], modifiers:
291 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
292 void clear() _NOEXCEPT
298 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
299 void remove_prefix(size_type __n) _NOEXCEPT
301 _LIBCPP_ASSERT(__n <= size(), "remove_prefix() can't remove more than size()");
306 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
307 void remove_suffix(size_type __n) _NOEXCEPT
309 _LIBCPP_ASSERT(__n <= size(), "remove_suffix() can't remove more than size()");
313 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
314 void swap(basic_string_view& __other) _NOEXCEPT
316 const value_type *__p = __data;
317 __data = __other.__data;
318 __other.__data = __p;
320 size_type __sz = __size;
321 __size = __other.__size;
322 __other.__size = __sz;
325 _LIBCPP_INLINE_VISIBILITY
326 size_type copy(_CharT* __s, size_type __n, size_type __pos = 0) const
329 __throw_out_of_range("string_view::copy");
330 size_type __rlen = _VSTD::min(__n, size() - __pos);
331 _Traits::copy(__s, data() + __pos, __rlen);
335 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
336 basic_string_view substr(size_type __pos = 0, size_type __n = npos) const
338 return __pos > size()
339 ? (__throw_out_of_range("string_view::substr"), basic_string_view())
340 : basic_string_view(data() + __pos, _VSTD::min(__n, size() - __pos));
343 _LIBCPP_CONSTEXPR_AFTER_CXX11 int compare(basic_string_view __sv) const _NOEXCEPT
345 size_type __rlen = _VSTD::min( size(), __sv.size());
346 int __retval = _Traits::compare(data(), __sv.data(), __rlen);
347 if ( __retval == 0 ) // first __rlen chars matched
348 __retval = size() == __sv.size() ? 0 : ( size() < __sv.size() ? -1 : 1 );
352 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
353 int compare(size_type __pos1, size_type __n1, basic_string_view __sv) const
355 return substr(__pos1, __n1).compare(__sv);
358 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
359 int compare( size_type __pos1, size_type __n1,
360 basic_string_view _sv, size_type __pos2, size_type __n2) const
362 return substr(__pos1, __n1).compare(_sv.substr(__pos2, __n2));
365 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
366 int compare(const _CharT* __s) const _NOEXCEPT
368 return compare(basic_string_view(__s));
371 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
372 int compare(size_type __pos1, size_type __n1, const _CharT* __s) const
374 return substr(__pos1, __n1).compare(basic_string_view(__s));
377 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
378 int compare(size_type __pos1, size_type __n1, const _CharT* __s, size_type __n2) const
380 return substr(__pos1, __n1).compare(basic_string_view(__s, __n2));
384 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
385 size_type find(basic_string_view __s, size_type __pos = 0) const _NOEXCEPT
387 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find(): received nullptr");
388 return __str_find<value_type, size_type, traits_type, npos>
389 (data(), size(), __s.data(), __pos, __s.size());
392 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
393 size_type find(_CharT __c, size_type __pos = 0) const _NOEXCEPT
395 return __str_find<value_type, size_type, traits_type, npos>
396 (data(), size(), __c, __pos);
399 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
400 size_type find(const _CharT* __s, size_type __pos, size_type __n) const
402 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find(): received nullptr");
403 return __str_find<value_type, size_type, traits_type, npos>
404 (data(), size(), __s, __pos, __n);
407 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
408 size_type find(const _CharT* __s, size_type __pos = 0) const
410 _LIBCPP_ASSERT(__s != nullptr, "string_view::find(): received nullptr");
411 return __str_find<value_type, size_type, traits_type, npos>
412 (data(), size(), __s, __pos, traits_type::length(__s));
416 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
417 size_type rfind(basic_string_view __s, size_type __pos = npos) const _NOEXCEPT
419 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find(): received nullptr");
420 return __str_rfind<value_type, size_type, traits_type, npos>
421 (data(), size(), __s.data(), __pos, __s.size());
424 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
425 size_type rfind(_CharT __c, size_type __pos = npos) const _NOEXCEPT
427 return __str_rfind<value_type, size_type, traits_type, npos>
428 (data(), size(), __c, __pos);
431 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
432 size_type rfind(const _CharT* __s, size_type __pos, size_type __n) const
434 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::rfind(): received nullptr");
435 return __str_rfind<value_type, size_type, traits_type, npos>
436 (data(), size(), __s, __pos, __n);
439 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
440 size_type rfind(const _CharT* __s, size_type __pos=npos) const
442 _LIBCPP_ASSERT(__s != nullptr, "string_view::rfind(): received nullptr");
443 return __str_rfind<value_type, size_type, traits_type, npos>
444 (data(), size(), __s, __pos, traits_type::length(__s));
448 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
449 size_type find_first_of(basic_string_view __s, size_type __pos = 0) const _NOEXCEPT
451 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_first_of(): received nullptr");
452 return __str_find_first_of<value_type, size_type, traits_type, npos>
453 (data(), size(), __s.data(), __pos, __s.size());
456 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
457 size_type find_first_of(_CharT __c, size_type __pos = 0) const _NOEXCEPT
458 { return find(__c, __pos); }
460 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
461 size_type find_first_of(const _CharT* __s, size_type __pos, size_type __n) const
463 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_first_of(): received nullptr");
464 return __str_find_first_of<value_type, size_type, traits_type, npos>
465 (data(), size(), __s, __pos, __n);
468 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
469 size_type find_first_of(const _CharT* __s, size_type __pos=0) const
471 _LIBCPP_ASSERT(__s != nullptr, "string_view::find_first_of(): received nullptr");
472 return __str_find_first_of<value_type, size_type, traits_type, npos>
473 (data(), size(), __s, __pos, traits_type::length(__s));
477 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
478 size_type find_last_of(basic_string_view __s, size_type __pos=npos) const _NOEXCEPT
480 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_last_of(): received nullptr");
481 return __str_find_last_of<value_type, size_type, traits_type, npos>
482 (data(), size(), __s.data(), __pos, __s.size());
485 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
486 size_type find_last_of(_CharT __c, size_type __pos = npos) const _NOEXCEPT
487 { return rfind(__c, __pos); }
489 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
490 size_type find_last_of(const _CharT* __s, size_type __pos, size_type __n) const
492 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_last_of(): received nullptr");
493 return __str_find_last_of<value_type, size_type, traits_type, npos>
494 (data(), size(), __s, __pos, __n);
497 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
498 size_type find_last_of(const _CharT* __s, size_type __pos=npos) const
500 _LIBCPP_ASSERT(__s != nullptr, "string_view::find_last_of(): received nullptr");
501 return __str_find_last_of<value_type, size_type, traits_type, npos>
502 (data(), size(), __s, __pos, traits_type::length(__s));
506 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
507 size_type find_first_not_of(basic_string_view __s, size_type __pos=0) const _NOEXCEPT
509 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_first_not_of(): received nullptr");
510 return __str_find_first_not_of<value_type, size_type, traits_type, npos>
511 (data(), size(), __s.data(), __pos, __s.size());
514 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
515 size_type find_first_not_of(_CharT __c, size_type __pos=0) const _NOEXCEPT
517 return __str_find_first_not_of<value_type, size_type, traits_type, npos>
518 (data(), size(), __c, __pos);
521 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
522 size_type find_first_not_of(const _CharT* __s, size_type __pos, size_type __n) const
524 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_first_not_of(): received nullptr");
525 return __str_find_first_not_of<value_type, size_type, traits_type, npos>
526 (data(), size(), __s, __pos, __n);
529 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
530 size_type find_first_not_of(const _CharT* __s, size_type __pos=0) const
532 _LIBCPP_ASSERT(__s != nullptr, "string_view::find_first_not_of(): received nullptr");
533 return __str_find_first_not_of<value_type, size_type, traits_type, npos>
534 (data(), size(), __s, __pos, traits_type::length(__s));
538 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
539 size_type find_last_not_of(basic_string_view __s, size_type __pos=npos) const _NOEXCEPT
541 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_last_not_of(): received nullptr");
542 return __str_find_last_not_of<value_type, size_type, traits_type, npos>
543 (data(), size(), __s.data(), __pos, __s.size());
546 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
547 size_type find_last_not_of(_CharT __c, size_type __pos=npos) const _NOEXCEPT
549 return __str_find_last_not_of<value_type, size_type, traits_type, npos>
550 (data(), size(), __c, __pos);
553 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
554 size_type find_last_not_of(const _CharT* __s, size_type __pos, size_type __n) const
556 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_last_not_of(): received nullptr");
557 return __str_find_last_not_of<value_type, size_type, traits_type, npos>
558 (data(), size(), __s, __pos, __n);
561 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
562 size_type find_last_not_of(const _CharT* __s, size_type __pos=npos) const
564 _LIBCPP_ASSERT(__s != nullptr, "string_view::find_last_not_of(): received nullptr");
565 return __str_find_last_not_of<value_type, size_type, traits_type, npos>
566 (data(), size(), __s, __pos, traits_type::length(__s));
570 const value_type* __data;
575 // [string.view.comparison]
577 template<class _CharT, class _Traits>
578 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
579 bool operator==(basic_string_view<_CharT, _Traits> __lhs,
580 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
582 if ( __lhs.size() != __rhs.size()) return false;
583 return __lhs.compare(__rhs) == 0;
586 template<class _CharT, class _Traits>
587 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
588 bool operator==(basic_string_view<_CharT, _Traits> __lhs,
589 typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
591 if ( __lhs.size() != __rhs.size()) return false;
592 return __lhs.compare(__rhs) == 0;
595 template<class _CharT, class _Traits>
596 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
597 bool operator==(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
598 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
600 if ( __lhs.size() != __rhs.size()) return false;
601 return __lhs.compare(__rhs) == 0;
606 template<class _CharT, class _Traits>
607 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
608 bool operator!=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
610 if ( __lhs.size() != __rhs.size())
612 return __lhs.compare(__rhs) != 0;
615 template<class _CharT, class _Traits>
616 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
617 bool operator!=(basic_string_view<_CharT, _Traits> __lhs,
618 typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
620 if ( __lhs.size() != __rhs.size())
622 return __lhs.compare(__rhs) != 0;
625 template<class _CharT, class _Traits>
626 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
627 bool operator!=(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
628 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
630 if ( __lhs.size() != __rhs.size())
632 return __lhs.compare(__rhs) != 0;
637 template<class _CharT, class _Traits>
638 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
639 bool operator<(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
641 return __lhs.compare(__rhs) < 0;
644 template<class _CharT, class _Traits>
645 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
646 bool operator<(basic_string_view<_CharT, _Traits> __lhs,
647 typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
649 return __lhs.compare(__rhs) < 0;
652 template<class _CharT, class _Traits>
653 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
654 bool operator<(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
655 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
657 return __lhs.compare(__rhs) < 0;
662 template<class _CharT, class _Traits>
663 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
664 bool operator> (basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
666 return __lhs.compare(__rhs) > 0;
669 template<class _CharT, class _Traits>
670 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
671 bool operator>(basic_string_view<_CharT, _Traits> __lhs,
672 typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
674 return __lhs.compare(__rhs) > 0;
677 template<class _CharT, class _Traits>
678 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
679 bool operator>(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
680 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
682 return __lhs.compare(__rhs) > 0;
687 template<class _CharT, class _Traits>
688 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
689 bool operator<=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
691 return __lhs.compare(__rhs) <= 0;
694 template<class _CharT, class _Traits>
695 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
696 bool operator<=(basic_string_view<_CharT, _Traits> __lhs,
697 typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
699 return __lhs.compare(__rhs) <= 0;
702 template<class _CharT, class _Traits>
703 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
704 bool operator<=(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
705 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
707 return __lhs.compare(__rhs) <= 0;
712 template<class _CharT, class _Traits>
713 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
714 bool operator>=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
716 return __lhs.compare(__rhs) >= 0;
720 template<class _CharT, class _Traits>
721 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
722 bool operator>=(basic_string_view<_CharT, _Traits> __lhs,
723 typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
725 return __lhs.compare(__rhs) >= 0;
728 template<class _CharT, class _Traits>
729 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
730 bool operator>=(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
731 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
733 return __lhs.compare(__rhs) >= 0;
736 typedef basic_string_view<char> string_view;
737 typedef basic_string_view<char16_t> u16string_view;
738 typedef basic_string_view<char32_t> u32string_view;
739 typedef basic_string_view<wchar_t> wstring_view;
741 // [string.view.hash]
742 template<class _CharT, class _Traits>
743 struct _LIBCPP_TEMPLATE_VIS hash<basic_string_view<_CharT, _Traits> >
744 : public unary_function<basic_string_view<_CharT, _Traits>, size_t>
746 size_t operator()(const basic_string_view<_CharT, _Traits> __val) const _NOEXCEPT;
749 template<class _CharT, class _Traits>
751 hash<basic_string_view<_CharT, _Traits> >::operator()(
752 const basic_string_view<_CharT, _Traits> __val) const _NOEXCEPT
754 return __do_string_hash(__val.data(), __val.data() + __val.size());
758 #if _LIBCPP_STD_VER > 11
759 inline namespace literals
761 inline namespace string_view_literals
763 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
764 basic_string_view<char> operator "" sv(const char *__str, size_t __len)
766 return basic_string_view<char> (__str, __len);
769 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
770 basic_string_view<wchar_t> operator "" sv(const wchar_t *__str, size_t __len)
772 return basic_string_view<wchar_t> (__str, __len);
775 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
776 basic_string_view<char16_t> operator "" sv(const char16_t *__str, size_t __len)
778 return basic_string_view<char16_t> (__str, __len);
781 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
782 basic_string_view<char32_t> operator "" sv(const char32_t *__str, size_t __len)
784 return basic_string_view<char32_t> (__str, __len);
789 _LIBCPP_END_NAMESPACE_STD
791 #endif // _LIBCPP_STRING_VIEW