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_LFTS_STRING_VIEW
12 #define _LIBCPP_LFTS_STRING_VIEW
18 namespace experimental {
19 inline namespace library_fundamentals_v1 {
21 // 7.2, Class template basic_string_view
22 template<class charT, class traits = char_traits<charT>>
23 class basic_string_view;
25 // 7.9, basic_string_view non-member comparison functions
26 template<class charT, class traits>
27 constexpr bool operator==(basic_string_view<charT, traits> x,
28 basic_string_view<charT, traits> y) noexcept;
29 template<class charT, class traits>
30 constexpr bool operator!=(basic_string_view<charT, traits> x,
31 basic_string_view<charT, traits> y) noexcept;
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>
36 constexpr bool operator> (basic_string_view<charT, traits> x,
37 basic_string_view<charT, traits> y) noexcept;
38 template<class charT, class traits>
39 constexpr bool operator<=(basic_string_view<charT, traits> x,
40 basic_string_view<charT, traits> y) noexcept;
41 template<class charT, class traits>
42 constexpr bool operator>=(basic_string_view<charT, traits> x,
43 basic_string_view<charT, traits> y) noexcept;
44 // see below, sufficient additional overloads of comparison functions
46 // 7.10, Inserters and extractors
47 template<class charT, class traits>
48 basic_ostream<charT, traits>&
49 operator<<(basic_ostream<charT, traits>& os,
50 basic_string_view<charT, traits> str);
52 // basic_string_view typedef names
53 typedef basic_string_view<char> string_view;
54 typedef basic_string_view<char16_t> u16string_view;
55 typedef basic_string_view<char32_t> u32string_view;
56 typedef basic_string_view<wchar_t> wstring_view;
58 template<class charT, class traits = char_traits<charT>>
59 class basic_string_view {
62 typedef traits traits_type;
63 typedef charT value_type;
64 typedef charT* pointer;
65 typedef const charT* const_pointer;
66 typedef charT& reference;
67 typedef const charT& const_reference;
68 typedef implementation-defined const_iterator;
69 typedef const_iterator iterator;
70 typedef reverse_iterator<const_iterator> const_reverse_iterator;
71 typedef const_reverse_iterator reverse_iterator;
72 typedef size_t size_type;
73 typedef ptrdiff_t difference_type;
74 static constexpr size_type npos = size_type(-1);
76 // 7.3, basic_string_view constructors and assignment operators
77 constexpr basic_string_view() noexcept;
78 constexpr basic_string_view(const basic_string_view&) noexcept = default;
79 basic_string_view& operator=(const basic_string_view&) noexcept = default;
80 template<class Allocator>
81 basic_string_view(const basic_string<charT, traits, Allocator>& str) noexcept;
82 constexpr basic_string_view(const charT* str);
83 constexpr basic_string_view(const charT* str, size_type len);
85 // 7.4, basic_string_view iterator support
86 constexpr const_iterator begin() const noexcept;
87 constexpr const_iterator end() const noexcept;
88 constexpr const_iterator cbegin() const noexcept;
89 constexpr const_iterator cend() const noexcept;
90 const_reverse_iterator rbegin() const noexcept;
91 const_reverse_iterator rend() const noexcept;
92 const_reverse_iterator crbegin() const noexcept;
93 const_reverse_iterator crend() const noexcept;
95 // 7.5, basic_string_view capacity
96 constexpr size_type size() const noexcept;
97 constexpr size_type length() const noexcept;
98 constexpr size_type max_size() const noexcept;
99 constexpr bool empty() const noexcept;
101 // 7.6, basic_string_view element access
102 constexpr const_reference operator[](size_type pos) const;
103 constexpr const_reference at(size_type pos) const;
104 constexpr const_reference front() const;
105 constexpr const_reference back() const;
106 constexpr const_pointer data() const noexcept;
108 // 7.7, basic_string_view modifiers
109 constexpr void clear() noexcept;
110 constexpr void remove_prefix(size_type n);
111 constexpr void remove_suffix(size_type n);
112 constexpr void swap(basic_string_view& s) noexcept;
114 // 7.8, basic_string_view string operations
115 template<class Allocator>
116 explicit operator basic_string<charT, traits, Allocator>() const;
117 template<class Allocator = allocator<charT>>
118 basic_string<charT, traits, Allocator> to_string(
119 const Allocator& a = Allocator()) const;
121 size_type copy(charT* s, size_type n, size_type pos = 0) const;
123 constexpr basic_string_view substr(size_type pos = 0, size_type n = npos) const;
124 constexpr int compare(basic_string_view s) const noexcept;
125 constexpr int compare(size_type pos1, size_type n1, basic_string_view s) const;
126 constexpr int compare(size_type pos1, size_type n1,
127 basic_string_view s, size_type pos2, size_type n2) const;
128 constexpr int compare(const charT* s) const;
129 constexpr int compare(size_type pos1, size_type n1, const charT* s) const;
130 constexpr int compare(size_type pos1, size_type n1,
131 const charT* s, size_type n2) const;
132 constexpr size_type find(basic_string_view s, size_type pos = 0) const noexcept;
133 constexpr size_type find(charT c, size_type pos = 0) const noexcept;
134 constexpr size_type find(const charT* s, size_type pos, size_type n) const;
135 constexpr size_type find(const charT* s, size_type pos = 0) const;
136 constexpr size_type rfind(basic_string_view s, size_type pos = npos) const noexcept;
137 constexpr size_type rfind(charT c, size_type pos = npos) const noexcept;
138 constexpr size_type rfind(const charT* s, size_type pos, size_type n) const;
139 constexpr size_type rfind(const charT* s, size_type pos = npos) const;
140 constexpr size_type find_first_of(basic_string_view s, size_type pos = 0) const noexcept;
141 constexpr size_type find_first_of(charT c, size_type pos = 0) const noexcept;
142 constexpr size_type find_first_of(const charT* s, size_type pos, size_type n) const;
143 constexpr size_type find_first_of(const charT* s, size_type pos = 0) const;
144 constexpr size_type find_last_of(basic_string_view s, size_type pos = npos) const noexcept;
145 constexpr size_type find_last_of(charT c, size_type pos = npos) const noexcept;
146 constexpr size_type find_last_of(const charT* s, size_type pos, size_type n) const;
147 constexpr size_type find_last_of(const charT* s, size_type pos = npos) const;
148 constexpr size_type find_first_not_of(basic_string_view s, size_type pos = 0) const noexcept;
149 constexpr size_type find_first_not_of(charT c, size_type pos = 0) const noexcept;
150 constexpr size_type find_first_not_of(const charT* s, size_type pos, size_type n) const;
151 constexpr size_type find_first_not_of(const charT* s, size_type pos = 0) const;
152 constexpr size_type find_last_not_of(basic_string_view s, size_type pos = npos) const noexcept;
153 constexpr size_type find_last_not_of(charT c, size_type pos = npos) const noexcept;
154 constexpr size_type find_last_not_of(const charT* s, size_type pos, size_type n) const;
155 constexpr size_type find_last_not_of(const charT* s, size_type pos = npos) const;
158 const_pointer data_; // exposition only
159 size_type size_; // exposition only
162 } // namespace fundamentals_v1
163 } // namespace experimental
165 // 7.11, Hash support
166 template <class T> struct hash;
167 template <> struct hash<experimental::string_view>;
168 template <> struct hash<experimental::u16string_view>;
169 template <> struct hash<experimental::u32string_view>;
170 template <> struct hash<experimental::wstring_view>;
177 #include <experimental/__config>
188 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
189 #pragma GCC system_header
193 #include <__undef_macros>
195 _LIBCPP_BEGIN_NAMESPACE_LFTS
197 template<class _CharT, class _Traits = _VSTD::char_traits<_CharT> >
198 class _LIBCPP_TEMPLATE_VIS basic_string_view {
201 typedef _Traits traits_type;
202 typedef _CharT value_type;
203 typedef const _CharT* pointer;
204 typedef const _CharT* const_pointer;
205 typedef const _CharT& reference;
206 typedef const _CharT& const_reference;
207 typedef const_pointer const_iterator; // See [string.view.iterators]
208 typedef const_iterator iterator;
209 typedef _VSTD::reverse_iterator<const_iterator> const_reverse_iterator;
210 typedef const_reverse_iterator reverse_iterator;
211 typedef size_t size_type;
212 typedef ptrdiff_t difference_type;
213 static _LIBCPP_CONSTEXPR const size_type npos = -1; // size_type(-1);
215 // [string.view.cons], construct/copy
216 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
217 basic_string_view() _NOEXCEPT : __data (nullptr), __size(0) {}
219 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
220 basic_string_view(const basic_string_view&) _NOEXCEPT = default;
222 _LIBCPP_INLINE_VISIBILITY
223 basic_string_view& operator=(const basic_string_view&) _NOEXCEPT = default;
225 template<class _Allocator>
226 _LIBCPP_INLINE_VISIBILITY
227 basic_string_view(const basic_string<_CharT, _Traits, _Allocator>& __str) _NOEXCEPT
228 : __data (__str.data()), __size(__str.size()) {}
230 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
231 basic_string_view(const _CharT* __s, size_type __len)
232 : __data(__s), __size(__len)
234 // _LIBCPP_ASSERT(__len == 0 || __s != nullptr, "string_view::string_view(_CharT *, size_t): received nullptr");
237 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
238 basic_string_view(const _CharT* __s)
239 : __data(__s), __size(_Traits::length(__s)) {}
241 // [string.view.iterators], iterators
242 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
243 const_iterator begin() const _NOEXCEPT { return cbegin(); }
245 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
246 const_iterator end() const _NOEXCEPT { return cend(); }
248 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
249 const_iterator cbegin() const _NOEXCEPT { return __data; }
251 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
252 const_iterator cend() const _NOEXCEPT { return __data + __size; }
254 _LIBCPP_INLINE_VISIBILITY
255 const_reverse_iterator rbegin() const _NOEXCEPT { return const_reverse_iterator(cend()); }
257 _LIBCPP_INLINE_VISIBILITY
258 const_reverse_iterator rend() const _NOEXCEPT { return const_reverse_iterator(cbegin()); }
260 _LIBCPP_INLINE_VISIBILITY
261 const_reverse_iterator crbegin() const _NOEXCEPT { return const_reverse_iterator(cend()); }
263 _LIBCPP_INLINE_VISIBILITY
264 const_reverse_iterator crend() const _NOEXCEPT { return const_reverse_iterator(cbegin()); }
266 // [string.view.capacity], capacity
267 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
268 size_type size() const _NOEXCEPT { return __size; }
270 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
271 size_type length() const _NOEXCEPT { return __size; }
273 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
274 size_type max_size() const _NOEXCEPT { return _VSTD::numeric_limits<size_type>::max(); }
276 _LIBCPP_CONSTEXPR bool _LIBCPP_INLINE_VISIBILITY
277 empty() const _NOEXCEPT { return __size == 0; }
279 // [string.view.access], element access
280 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
281 const_reference operator[](size_type __pos) const { return __data[__pos]; }
283 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
284 const_reference at(size_type __pos) const
286 return __pos >= size()
287 ? (__throw_out_of_range("string_view::at"), __data[0])
291 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
292 const_reference front() const
294 return _LIBCPP_ASSERT(!empty(), "string_view::front(): string is empty"), __data[0];
297 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
298 const_reference back() const
300 return _LIBCPP_ASSERT(!empty(), "string_view::back(): string is empty"), __data[__size-1];
303 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
304 const_pointer data() const _NOEXCEPT { return __data; }
306 // [string.view.modifiers], modifiers:
307 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
308 void clear() _NOEXCEPT
314 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
315 void remove_prefix(size_type __n) _NOEXCEPT
317 _LIBCPP_ASSERT(__n <= size(), "remove_prefix() can't remove more than size()");
322 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
323 void remove_suffix(size_type __n) _NOEXCEPT
325 _LIBCPP_ASSERT(__n <= size(), "remove_suffix() can't remove more than size()");
329 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
330 void swap(basic_string_view& __other) _NOEXCEPT
332 const value_type *__p = __data;
333 __data = __other.__data;
334 __other.__data = __p;
336 size_type __sz = __size;
337 __size = __other.__size;
338 __other.__size = __sz;
339 // _VSTD::swap( __data, __other.__data );
340 // _VSTD::swap( __size, __other.__size );
343 // [string.view.ops], string operations:
344 template<class _Allocator>
345 _LIBCPP_INLINE_VISIBILITY
346 _LIBCPP_EXPLICIT operator basic_string<_CharT, _Traits, _Allocator>() const
347 { return basic_string<_CharT, _Traits, _Allocator>( begin(), end()); }
349 template<class _Allocator = allocator<_CharT> >
350 _LIBCPP_INLINE_VISIBILITY
351 basic_string<_CharT, _Traits, _Allocator>
352 to_string( const _Allocator& __a = _Allocator()) const
353 { return basic_string<_CharT, _Traits, _Allocator> ( begin(), end(), __a ); }
355 size_type copy(_CharT* __s, size_type __n, size_type __pos = 0) const
358 __throw_out_of_range("string_view::copy");
359 size_type __rlen = _VSTD::min( __n, size() - __pos );
360 _VSTD::copy_n(begin() + __pos, __rlen, __s );
365 basic_string_view substr(size_type __pos = 0, size_type __n = npos) const
367 // if (__pos > size())
368 // __throw_out_of_range("string_view::substr");
369 // size_type __rlen = _VSTD::min( __n, size() - __pos );
370 // return basic_string_view(data() + __pos, __rlen);
371 return __pos > size()
372 ? (__throw_out_of_range("string_view::substr"), basic_string_view())
373 : basic_string_view(data() + __pos, _VSTD::min(__n, size() - __pos));
376 _LIBCPP_CONSTEXPR_AFTER_CXX11 int compare(basic_string_view __sv) const _NOEXCEPT
378 size_type __rlen = _VSTD::min( size(), __sv.size());
379 int __retval = _Traits::compare(data(), __sv.data(), __rlen);
380 if ( __retval == 0 ) // first __rlen chars matched
381 __retval = size() == __sv.size() ? 0 : ( size() < __sv.size() ? -1 : 1 );
385 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
386 int compare(size_type __pos1, size_type __n1, basic_string_view __sv) const
388 return substr(__pos1, __n1).compare(__sv);
391 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
392 int compare( size_type __pos1, size_type __n1,
393 basic_string_view _sv, size_type __pos2, size_type __n2) const
395 return substr(__pos1, __n1).compare(_sv.substr(__pos2, __n2));
398 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
399 int compare(const _CharT* __s) const
401 return compare(basic_string_view(__s));
404 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
405 int compare(size_type __pos1, size_type __n1, const _CharT* __s) const
407 return substr(__pos1, __n1).compare(basic_string_view(__s));
410 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
411 int compare(size_type __pos1, size_type __n1, const _CharT* __s, size_type __n2) const
413 return substr(__pos1, __n1).compare(basic_string_view(__s, __n2));
417 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
418 size_type find(basic_string_view __s, size_type __pos = 0) const _NOEXCEPT
420 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find(): received nullptr");
421 return _VSTD::__str_find<value_type, size_type, traits_type, npos>
422 (data(), size(), __s.data(), __pos, __s.size());
425 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
426 size_type find(_CharT __c, size_type __pos = 0) const _NOEXCEPT
428 return _VSTD::__str_find<value_type, size_type, traits_type, npos>
429 (data(), size(), __c, __pos);
432 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
433 size_type find(const _CharT* __s, size_type __pos, size_type __n) const
435 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find(): received nullptr");
436 return _VSTD::__str_find<value_type, size_type, traits_type, npos>
437 (data(), size(), __s, __pos, __n);
440 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
441 size_type find(const _CharT* __s, size_type __pos = 0) const
443 _LIBCPP_ASSERT(__s != nullptr, "string_view::find(): received nullptr");
444 return _VSTD::__str_find<value_type, size_type, traits_type, npos>
445 (data(), size(), __s, __pos, traits_type::length(__s));
449 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
450 size_type rfind(basic_string_view __s, size_type __pos = npos) const _NOEXCEPT
452 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find(): received nullptr");
453 return _VSTD::__str_rfind<value_type, size_type, traits_type, npos>
454 (data(), size(), __s.data(), __pos, __s.size());
457 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
458 size_type rfind(_CharT __c, size_type __pos = npos) const _NOEXCEPT
460 return _VSTD::__str_rfind<value_type, size_type, traits_type, npos>
461 (data(), size(), __c, __pos);
464 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
465 size_type rfind(const _CharT* __s, size_type __pos, size_type __n) const
467 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::rfind(): received nullptr");
468 return _VSTD::__str_rfind<value_type, size_type, traits_type, npos>
469 (data(), size(), __s, __pos, __n);
472 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
473 size_type rfind(const _CharT* __s, size_type __pos=npos) const
475 _LIBCPP_ASSERT(__s != nullptr, "string_view::rfind(): received nullptr");
476 return _VSTD::__str_rfind<value_type, size_type, traits_type, npos>
477 (data(), size(), __s, __pos, traits_type::length(__s));
481 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
482 size_type find_first_of(basic_string_view __s, size_type __pos = 0) const _NOEXCEPT
484 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_first_of(): received nullptr");
485 return _VSTD::__str_find_first_of<value_type, size_type, traits_type, npos>
486 (data(), size(), __s.data(), __pos, __s.size());
489 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
490 size_type find_first_of(_CharT __c, size_type __pos = 0) const _NOEXCEPT
491 { return find(__c, __pos); }
493 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
494 size_type find_first_of(const _CharT* __s, size_type __pos, size_type __n) const
496 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_first_of(): received nullptr");
497 return _VSTD::__str_find_first_of<value_type, size_type, traits_type, npos>
498 (data(), size(), __s, __pos, __n);
501 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
502 size_type find_first_of(const _CharT* __s, size_type __pos=0) const
504 _LIBCPP_ASSERT(__s != nullptr, "string_view::find_first_of(): received nullptr");
505 return _VSTD::__str_find_first_of<value_type, size_type, traits_type, npos>
506 (data(), size(), __s, __pos, traits_type::length(__s));
510 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
511 size_type find_last_of(basic_string_view __s, size_type __pos=npos) const _NOEXCEPT
513 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_last_of(): received nullptr");
514 return _VSTD::__str_find_last_of<value_type, size_type, traits_type, npos>
515 (data(), size(), __s.data(), __pos, __s.size());
518 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
519 size_type find_last_of(_CharT __c, size_type __pos = npos) const _NOEXCEPT
520 { return rfind(__c, __pos); }
522 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
523 size_type find_last_of(const _CharT* __s, size_type __pos, size_type __n) const
525 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_last_of(): received nullptr");
526 return _VSTD::__str_find_last_of<value_type, size_type, traits_type, npos>
527 (data(), size(), __s, __pos, __n);
530 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
531 size_type find_last_of(const _CharT* __s, size_type __pos=npos) const
533 _LIBCPP_ASSERT(__s != nullptr, "string_view::find_last_of(): received nullptr");
534 return _VSTD::__str_find_last_of<value_type, size_type, traits_type, npos>
535 (data(), size(), __s, __pos, traits_type::length(__s));
539 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
540 size_type find_first_not_of(basic_string_view __s, size_type __pos=0) const _NOEXCEPT
542 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_first_not_of(): received nullptr");
543 return _VSTD::__str_find_first_not_of<value_type, size_type, traits_type, npos>
544 (data(), size(), __s.data(), __pos, __s.size());
547 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
548 size_type find_first_not_of(_CharT __c, size_type __pos=0) const _NOEXCEPT
550 return _VSTD::__str_find_first_not_of<value_type, size_type, traits_type, npos>
551 (data(), size(), __c, __pos);
554 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
555 size_type find_first_not_of(const _CharT* __s, size_type __pos, size_type __n) const
557 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_first_not_of(): received nullptr");
558 return _VSTD::__str_find_first_not_of<value_type, size_type, traits_type, npos>
559 (data(), size(), __s, __pos, __n);
562 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
563 size_type find_first_not_of(const _CharT* __s, size_type __pos=0) const
565 _LIBCPP_ASSERT(__s != nullptr, "string_view::find_first_not_of(): received nullptr");
566 return _VSTD::__str_find_first_not_of<value_type, size_type, traits_type, npos>
567 (data(), size(), __s, __pos, traits_type::length(__s));
571 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
572 size_type find_last_not_of(basic_string_view __s, size_type __pos=npos) const _NOEXCEPT
574 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_last_not_of(): received nullptr");
575 return _VSTD::__str_find_last_not_of<value_type, size_type, traits_type, npos>
576 (data(), size(), __s.data(), __pos, __s.size());
579 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
580 size_type find_last_not_of(_CharT __c, size_type __pos=npos) const _NOEXCEPT
582 return _VSTD::__str_find_last_not_of<value_type, size_type, traits_type, npos>
583 (data(), size(), __c, __pos);
586 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
587 size_type find_last_not_of(const _CharT* __s, size_type __pos, size_type __n) const
589 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_last_not_of(): received nullptr");
590 return _VSTD::__str_find_last_not_of<value_type, size_type, traits_type, npos>
591 (data(), size(), __s, __pos, __n);
594 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
595 size_type find_last_not_of(const _CharT* __s, size_type __pos=npos) const
597 _LIBCPP_ASSERT(__s != nullptr, "string_view::find_last_not_of(): received nullptr");
598 return _VSTD::__str_find_last_not_of<value_type, size_type, traits_type, npos>
599 (data(), size(), __s, __pos, traits_type::length(__s));
603 const value_type* __data;
608 // [string.view.comparison]
610 template<class _CharT, class _Traits>
611 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
612 bool operator==(basic_string_view<_CharT, _Traits> __lhs,
613 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
615 if ( __lhs.size() != __rhs.size()) return false;
616 return __lhs.compare(__rhs) == 0;
619 template<class _CharT, class _Traits>
620 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
621 bool operator==(basic_string_view<_CharT, _Traits> __lhs,
622 typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
624 if ( __lhs.size() != __rhs.size()) return false;
625 return __lhs.compare(__rhs) == 0;
628 template<class _CharT, class _Traits>
629 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
630 bool operator==(typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
631 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
633 if ( __lhs.size() != __rhs.size()) return false;
634 return __lhs.compare(__rhs) == 0;
639 template<class _CharT, class _Traits>
640 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
641 bool operator!=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
643 if ( __lhs.size() != __rhs.size())
645 return __lhs.compare(__rhs) != 0;
648 template<class _CharT, class _Traits>
649 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
650 bool operator!=(basic_string_view<_CharT, _Traits> __lhs,
651 typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
653 if ( __lhs.size() != __rhs.size())
655 return __lhs.compare(__rhs) != 0;
658 template<class _CharT, class _Traits>
659 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
660 bool operator!=(typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
661 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
663 if ( __lhs.size() != __rhs.size())
665 return __lhs.compare(__rhs) != 0;
670 template<class _CharT, class _Traits>
671 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
672 bool operator<(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __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<(basic_string_view<_CharT, _Traits> __lhs,
680 typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
682 return __lhs.compare(__rhs) < 0;
685 template<class _CharT, class _Traits>
686 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
687 bool operator<(typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
688 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
690 return __lhs.compare(__rhs) < 0;
695 template<class _CharT, class _Traits>
696 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
697 bool operator> (basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __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>(basic_string_view<_CharT, _Traits> __lhs,
705 typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
707 return __lhs.compare(__rhs) > 0;
710 template<class _CharT, class _Traits>
711 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
712 bool operator>(typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
713 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
715 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, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
724 return __lhs.compare(__rhs) <= 0;
727 template<class _CharT, class _Traits>
728 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
729 bool operator<=(basic_string_view<_CharT, _Traits> __lhs,
730 typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
732 return __lhs.compare(__rhs) <= 0;
735 template<class _CharT, class _Traits>
736 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
737 bool operator<=(typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
738 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
740 return __lhs.compare(__rhs) <= 0;
745 template<class _CharT, class _Traits>
746 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
747 bool operator>=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
749 return __lhs.compare(__rhs) >= 0;
753 template<class _CharT, class _Traits>
754 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
755 bool operator>=(basic_string_view<_CharT, _Traits> __lhs,
756 typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
758 return __lhs.compare(__rhs) >= 0;
761 template<class _CharT, class _Traits>
762 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
763 bool operator>=(typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
764 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
766 return __lhs.compare(__rhs) >= 0;
771 template<class _CharT, class _Traits>
772 basic_ostream<_CharT, _Traits>&
773 operator<<(basic_ostream<_CharT, _Traits>& __os, basic_string_view<_CharT, _Traits> __sv)
775 return _VSTD::__put_character_sequence(__os, __sv.data(), __sv.size());
778 typedef basic_string_view<char> string_view;
779 typedef basic_string_view<char16_t> u16string_view;
780 typedef basic_string_view<char32_t> u32string_view;
781 typedef basic_string_view<wchar_t> wstring_view;
783 _LIBCPP_END_NAMESPACE_LFTS
784 _LIBCPP_BEGIN_NAMESPACE_STD
786 // [string.view.hash]
787 // Shamelessly stolen from <string>
788 template<class _CharT, class _Traits>
789 struct _LIBCPP_TEMPLATE_VIS hash<std::experimental::basic_string_view<_CharT, _Traits> >
790 : public unary_function<std::experimental::basic_string_view<_CharT, _Traits>, size_t>
792 size_t operator()(const std::experimental::basic_string_view<_CharT, _Traits>& __val) const _NOEXCEPT;
795 template<class _CharT, class _Traits>
797 hash<std::experimental::basic_string_view<_CharT, _Traits> >::operator()(
798 const std::experimental::basic_string_view<_CharT, _Traits>& __val) const _NOEXCEPT
800 return __do_string_hash(__val.data(), __val.data() + __val.size());
803 #if _LIBCPP_STD_VER > 11
804 template <class _CharT, class _Traits>
805 __quoted_output_proxy<_CharT, const _CharT *, _Traits>
806 quoted ( std::experimental::basic_string_view <_CharT, _Traits> __sv,
807 _CharT __delim = _CharT('"'), _CharT __escape=_CharT('\\'))
809 return __quoted_output_proxy<_CharT, const _CharT *, _Traits>
810 ( __sv.data(), __sv.data() + __sv.size(), __delim, __escape );
814 _LIBCPP_END_NAMESPACE_STD
818 #endif // _LIBCPP_LFTS_STRING_VIEW