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
192 _LIBCPP_BEGIN_NAMESPACE_LFTS
194 template<class _CharT, class _Traits = _VSTD::char_traits<_CharT> >
195 class _LIBCPP_TYPE_VIS_ONLY basic_string_view {
198 typedef _Traits traits_type;
199 typedef _CharT value_type;
200 typedef const _CharT* pointer;
201 typedef const _CharT* const_pointer;
202 typedef const _CharT& reference;
203 typedef const _CharT& const_reference;
204 typedef const_pointer const_iterator; // See [string.view.iterators]
205 typedef const_iterator iterator;
206 typedef _VSTD::reverse_iterator<const_iterator> const_reverse_iterator;
207 typedef const_reverse_iterator reverse_iterator;
208 typedef size_t size_type;
209 typedef ptrdiff_t difference_type;
210 static _LIBCPP_CONSTEXPR const size_type npos = -1; // size_type(-1);
212 // [string.view.cons], construct/copy
213 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
214 basic_string_view() _NOEXCEPT : __data (nullptr), __size(0) {}
216 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
217 basic_string_view(const basic_string_view&) _NOEXCEPT = default;
219 _LIBCPP_INLINE_VISIBILITY
220 basic_string_view& operator=(const basic_string_view&) _NOEXCEPT = default;
222 template<class _Allocator>
223 _LIBCPP_INLINE_VISIBILITY
224 basic_string_view(const basic_string<_CharT, _Traits, _Allocator>& __str) _NOEXCEPT
225 : __data (__str.data()), __size(__str.size()) {}
227 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
228 basic_string_view(const _CharT* __s, size_type __len)
229 : __data(__s), __size(__len)
231 // _LIBCPP_ASSERT(__len == 0 || __s != nullptr, "string_view::string_view(_CharT *, size_t): received nullptr");
234 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
235 basic_string_view(const _CharT* __s)
236 : __data(__s), __size(_Traits::length(__s)) {}
238 // [string.view.iterators], iterators
239 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
240 const_iterator begin() const _NOEXCEPT { return cbegin(); }
242 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
243 const_iterator end() const _NOEXCEPT { return cend(); }
245 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
246 const_iterator cbegin() const _NOEXCEPT { return __data; }
248 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
249 const_iterator cend() const _NOEXCEPT { return __data + __size; }
251 _LIBCPP_INLINE_VISIBILITY
252 const_reverse_iterator rbegin() const _NOEXCEPT { return const_reverse_iterator(cend()); }
254 _LIBCPP_INLINE_VISIBILITY
255 const_reverse_iterator rend() const _NOEXCEPT { return const_reverse_iterator(cbegin()); }
257 _LIBCPP_INLINE_VISIBILITY
258 const_reverse_iterator crbegin() const _NOEXCEPT { return const_reverse_iterator(cend()); }
260 _LIBCPP_INLINE_VISIBILITY
261 const_reverse_iterator crend() const _NOEXCEPT { return const_reverse_iterator(cbegin()); }
263 // [string.view.capacity], capacity
264 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
265 size_type size() const _NOEXCEPT { return __size; }
267 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
268 size_type length() const _NOEXCEPT { return __size; }
270 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
271 size_type max_size() const _NOEXCEPT { return _VSTD::numeric_limits<size_type>::max(); }
273 _LIBCPP_CONSTEXPR bool _LIBCPP_INLINE_VISIBILITY
274 empty() const _NOEXCEPT { return __size == 0; }
276 // [string.view.access], element access
277 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
278 const_reference operator[](size_type __pos) const { return __data[__pos]; }
280 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
281 const_reference at(size_type __pos) const
283 return __pos >= size()
284 ? (__libcpp_throw(out_of_range("string_view::at")), __data[0])
288 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
289 const_reference front() const
291 return _LIBCPP_ASSERT(!empty(), "string_view::front(): string is empty"), __data[0];
294 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
295 const_reference back() const
297 return _LIBCPP_ASSERT(!empty(), "string_view::back(): string is empty"), __data[__size-1];
300 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
301 const_pointer data() const _NOEXCEPT { return __data; }
303 // [string.view.modifiers], modifiers:
304 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
305 void clear() _NOEXCEPT
311 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
312 void remove_prefix(size_type __n) _NOEXCEPT
314 _LIBCPP_ASSERT(__n <= size(), "remove_prefix() can't remove more than size()");
319 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
320 void remove_suffix(size_type __n) _NOEXCEPT
322 _LIBCPP_ASSERT(__n <= size(), "remove_suffix() can't remove more than size()");
326 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
327 void swap(basic_string_view& __other) _NOEXCEPT
329 const value_type *__p = __data;
330 __data = __other.__data;
331 __other.__data = __p;
333 size_type __sz = __size;
334 __size = __other.__size;
335 __other.__size = __sz;
336 // _VSTD::swap( __data, __other.__data );
337 // _VSTD::swap( __size, __other.__size );
340 // [string.view.ops], string operations:
341 template<class _Allocator>
342 _LIBCPP_INLINE_VISIBILITY
343 _LIBCPP_EXPLICIT operator basic_string<_CharT, _Traits, _Allocator>() const
344 { return basic_string<_CharT, _Traits, _Allocator>( begin(), end()); }
346 template<class _Allocator = allocator<_CharT> >
347 _LIBCPP_INLINE_VISIBILITY
348 basic_string<_CharT, _Traits, _Allocator>
349 to_string( const _Allocator& __a = _Allocator()) const
350 { return basic_string<_CharT, _Traits, _Allocator> ( begin(), end(), __a ); }
352 size_type copy(_CharT* __s, size_type __n, size_type __pos = 0) const
355 __libcpp_throw(out_of_range("string_view::copy"));
356 size_type __rlen = _VSTD::min( __n, size() - __pos );
357 _VSTD::copy_n(begin() + __pos, __rlen, __s );
362 basic_string_view substr(size_type __pos = 0, size_type __n = npos) const
364 // if (__pos > size())
365 // throw out_of_range("string_view::substr");
366 // size_type __rlen = _VSTD::min( __n, size() - __pos );
367 // return basic_string_view(data() + __pos, __rlen);
368 return __pos > size()
369 ? (__libcpp_throw((out_of_range("string_view::substr"))), basic_string_view())
370 : basic_string_view(data() + __pos, _VSTD::min(__n, size() - __pos));
373 _LIBCPP_CONSTEXPR_AFTER_CXX11 int compare(basic_string_view __sv) const _NOEXCEPT
375 size_type __rlen = _VSTD::min( size(), __sv.size());
376 int __retval = _Traits::compare(data(), __sv.data(), __rlen);
377 if ( __retval == 0 ) // first __rlen chars matched
378 __retval = size() == __sv.size() ? 0 : ( size() < __sv.size() ? -1 : 1 );
382 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
383 int compare(size_type __pos1, size_type __n1, basic_string_view __sv) const
385 return substr(__pos1, __n1).compare(__sv);
388 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
389 int compare( size_type __pos1, size_type __n1,
390 basic_string_view _sv, size_type __pos2, size_type __n2) const
392 return substr(__pos1, __n1).compare(_sv.substr(__pos2, __n2));
395 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
396 int compare(const _CharT* __s) const
398 return compare(basic_string_view(__s));
401 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
402 int compare(size_type __pos1, size_type __n1, const _CharT* __s) const
404 return substr(__pos1, __n1).compare(basic_string_view(__s));
407 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
408 int compare(size_type __pos1, size_type __n1, const _CharT* __s, size_type __n2) const
410 return substr(__pos1, __n1).compare(basic_string_view(__s, __n2));
414 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
415 size_type find(basic_string_view __s, size_type __pos = 0) const _NOEXCEPT
417 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find(): received nullptr");
418 return _VSTD::__str_find<value_type, size_type, traits_type, npos>
419 (data(), size(), __s.data(), __pos, __s.size());
422 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
423 size_type find(_CharT __c, size_type __pos = 0) const _NOEXCEPT
425 return _VSTD::__str_find<value_type, size_type, traits_type, npos>
426 (data(), size(), __c, __pos);
429 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
430 size_type find(const _CharT* __s, size_type __pos, size_type __n) const
432 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find(): received nullptr");
433 return _VSTD::__str_find<value_type, size_type, traits_type, npos>
434 (data(), size(), __s, __pos, __n);
437 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
438 size_type find(const _CharT* __s, size_type __pos = 0) const
440 _LIBCPP_ASSERT(__s != nullptr, "string_view::find(): received nullptr");
441 return _VSTD::__str_find<value_type, size_type, traits_type, npos>
442 (data(), size(), __s, __pos, traits_type::length(__s));
446 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
447 size_type rfind(basic_string_view __s, size_type __pos = npos) const _NOEXCEPT
449 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find(): received nullptr");
450 return _VSTD::__str_rfind<value_type, size_type, traits_type, npos>
451 (data(), size(), __s.data(), __pos, __s.size());
454 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
455 size_type rfind(_CharT __c, size_type __pos = npos) const _NOEXCEPT
457 return _VSTD::__str_rfind<value_type, size_type, traits_type, npos>
458 (data(), size(), __c, __pos);
461 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
462 size_type rfind(const _CharT* __s, size_type __pos, size_type __n) const
464 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::rfind(): received nullptr");
465 return _VSTD::__str_rfind<value_type, size_type, traits_type, npos>
466 (data(), size(), __s, __pos, __n);
469 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
470 size_type rfind(const _CharT* __s, size_type __pos=npos) const
472 _LIBCPP_ASSERT(__s != nullptr, "string_view::rfind(): received nullptr");
473 return _VSTD::__str_rfind<value_type, size_type, traits_type, npos>
474 (data(), size(), __s, __pos, traits_type::length(__s));
478 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
479 size_type find_first_of(basic_string_view __s, size_type __pos = 0) const _NOEXCEPT
481 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_first_of(): received nullptr");
482 return _VSTD::__str_find_first_of<value_type, size_type, traits_type, npos>
483 (data(), size(), __s.data(), __pos, __s.size());
486 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
487 size_type find_first_of(_CharT __c, size_type __pos = 0) const _NOEXCEPT
488 { return find(__c, __pos); }
490 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
491 size_type find_first_of(const _CharT* __s, size_type __pos, size_type __n) const
493 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_first_of(): received nullptr");
494 return _VSTD::__str_find_first_of<value_type, size_type, traits_type, npos>
495 (data(), size(), __s, __pos, __n);
498 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
499 size_type find_first_of(const _CharT* __s, size_type __pos=0) const
501 _LIBCPP_ASSERT(__s != nullptr, "string_view::find_first_of(): received nullptr");
502 return _VSTD::__str_find_first_of<value_type, size_type, traits_type, npos>
503 (data(), size(), __s, __pos, traits_type::length(__s));
507 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
508 size_type find_last_of(basic_string_view __s, size_type __pos=npos) const _NOEXCEPT
510 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_last_of(): received nullptr");
511 return _VSTD::__str_find_last_of<value_type, size_type, traits_type, npos>
512 (data(), size(), __s.data(), __pos, __s.size());
515 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
516 size_type find_last_of(_CharT __c, size_type __pos = npos) const _NOEXCEPT
517 { return rfind(__c, __pos); }
519 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
520 size_type find_last_of(const _CharT* __s, size_type __pos, size_type __n) const
522 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_last_of(): received nullptr");
523 return _VSTD::__str_find_last_of<value_type, size_type, traits_type, npos>
524 (data(), size(), __s, __pos, __n);
527 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
528 size_type find_last_of(const _CharT* __s, size_type __pos=npos) const
530 _LIBCPP_ASSERT(__s != nullptr, "string_view::find_last_of(): received nullptr");
531 return _VSTD::__str_find_last_of<value_type, size_type, traits_type, npos>
532 (data(), size(), __s, __pos, traits_type::length(__s));
536 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
537 size_type find_first_not_of(basic_string_view __s, size_type __pos=0) const _NOEXCEPT
539 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_first_not_of(): received nullptr");
540 return _VSTD::__str_find_first_not_of<value_type, size_type, traits_type, npos>
541 (data(), size(), __s.data(), __pos, __s.size());
544 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
545 size_type find_first_not_of(_CharT __c, size_type __pos=0) const _NOEXCEPT
547 return _VSTD::__str_find_first_not_of<value_type, size_type, traits_type, npos>
548 (data(), size(), __c, __pos);
551 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
552 size_type find_first_not_of(const _CharT* __s, size_type __pos, size_type __n) const
554 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_first_not_of(): received nullptr");
555 return _VSTD::__str_find_first_not_of<value_type, size_type, traits_type, npos>
556 (data(), size(), __s, __pos, __n);
559 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
560 size_type find_first_not_of(const _CharT* __s, size_type __pos=0) const
562 _LIBCPP_ASSERT(__s != nullptr, "string_view::find_first_not_of(): received nullptr");
563 return _VSTD::__str_find_first_not_of<value_type, size_type, traits_type, npos>
564 (data(), size(), __s, __pos, traits_type::length(__s));
568 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
569 size_type find_last_not_of(basic_string_view __s, size_type __pos=npos) const _NOEXCEPT
571 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_last_not_of(): received nullptr");
572 return _VSTD::__str_find_last_not_of<value_type, size_type, traits_type, npos>
573 (data(), size(), __s.data(), __pos, __s.size());
576 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
577 size_type find_last_not_of(_CharT __c, size_type __pos=npos) const _NOEXCEPT
579 return _VSTD::__str_find_last_not_of<value_type, size_type, traits_type, npos>
580 (data(), size(), __c, __pos);
583 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
584 size_type find_last_not_of(const _CharT* __s, size_type __pos, size_type __n) const
586 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_last_not_of(): received nullptr");
587 return _VSTD::__str_find_last_not_of<value_type, size_type, traits_type, npos>
588 (data(), size(), __s, __pos, __n);
591 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
592 size_type find_last_not_of(const _CharT* __s, size_type __pos=npos) const
594 _LIBCPP_ASSERT(__s != nullptr, "string_view::find_last_not_of(): received nullptr");
595 return _VSTD::__str_find_last_not_of<value_type, size_type, traits_type, npos>
596 (data(), size(), __s, __pos, traits_type::length(__s));
600 const value_type* __data;
605 // [string.view.comparison]
607 template<class _CharT, class _Traits>
608 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
609 bool operator==(basic_string_view<_CharT, _Traits> __lhs,
610 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
612 if ( __lhs.size() != __rhs.size()) return false;
613 return __lhs.compare(__rhs) == 0;
616 template<class _CharT, class _Traits>
617 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
618 bool operator==(basic_string_view<_CharT, _Traits> __lhs,
619 typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
621 if ( __lhs.size() != __rhs.size()) return false;
622 return __lhs.compare(__rhs) == 0;
625 template<class _CharT, class _Traits>
626 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
627 bool operator==(typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
628 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
630 if ( __lhs.size() != __rhs.size()) return false;
631 return __lhs.compare(__rhs) == 0;
636 template<class _CharT, class _Traits>
637 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
638 bool operator!=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
640 if ( __lhs.size() != __rhs.size())
642 return __lhs.compare(__rhs) != 0;
645 template<class _CharT, class _Traits>
646 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
647 bool operator!=(basic_string_view<_CharT, _Traits> __lhs,
648 typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
650 if ( __lhs.size() != __rhs.size())
652 return __lhs.compare(__rhs) != 0;
655 template<class _CharT, class _Traits>
656 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
657 bool operator!=(typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
658 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
660 if ( __lhs.size() != __rhs.size())
662 return __lhs.compare(__rhs) != 0;
667 template<class _CharT, class _Traits>
668 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
669 bool operator<(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
671 return __lhs.compare(__rhs) < 0;
674 template<class _CharT, class _Traits>
675 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
676 bool operator<(basic_string_view<_CharT, _Traits> __lhs,
677 typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
679 return __lhs.compare(__rhs) < 0;
682 template<class _CharT, class _Traits>
683 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
684 bool operator<(typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
685 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
687 return __lhs.compare(__rhs) < 0;
692 template<class _CharT, class _Traits>
693 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
694 bool operator> (basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
696 return __lhs.compare(__rhs) > 0;
699 template<class _CharT, class _Traits>
700 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
701 bool operator>(basic_string_view<_CharT, _Traits> __lhs,
702 typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
704 return __lhs.compare(__rhs) > 0;
707 template<class _CharT, class _Traits>
708 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
709 bool operator>(typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
710 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
712 return __lhs.compare(__rhs) > 0;
717 template<class _CharT, class _Traits>
718 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
719 bool operator<=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
721 return __lhs.compare(__rhs) <= 0;
724 template<class _CharT, class _Traits>
725 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
726 bool operator<=(basic_string_view<_CharT, _Traits> __lhs,
727 typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
729 return __lhs.compare(__rhs) <= 0;
732 template<class _CharT, class _Traits>
733 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
734 bool operator<=(typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
735 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
737 return __lhs.compare(__rhs) <= 0;
742 template<class _CharT, class _Traits>
743 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
744 bool operator>=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
746 return __lhs.compare(__rhs) >= 0;
750 template<class _CharT, class _Traits>
751 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
752 bool operator>=(basic_string_view<_CharT, _Traits> __lhs,
753 typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
755 return __lhs.compare(__rhs) >= 0;
758 template<class _CharT, class _Traits>
759 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
760 bool operator>=(typename _VSTD::common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
761 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
763 return __lhs.compare(__rhs) >= 0;
768 template<class _CharT, class _Traits>
769 basic_ostream<_CharT, _Traits>&
770 operator<<(basic_ostream<_CharT, _Traits>& __os, basic_string_view<_CharT, _Traits> __sv)
772 return _VSTD::__put_character_sequence(__os, __sv.data(), __sv.size());
775 typedef basic_string_view<char> string_view;
776 typedef basic_string_view<char16_t> u16string_view;
777 typedef basic_string_view<char32_t> u32string_view;
778 typedef basic_string_view<wchar_t> wstring_view;
780 _LIBCPP_END_NAMESPACE_LFTS
781 _LIBCPP_BEGIN_NAMESPACE_STD
783 // [string.view.hash]
784 // Shamelessly stolen from <string>
785 template<class _CharT, class _Traits>
786 struct _LIBCPP_TYPE_VIS_ONLY hash<std::experimental::basic_string_view<_CharT, _Traits> >
787 : public unary_function<std::experimental::basic_string_view<_CharT, _Traits>, size_t>
789 size_t operator()(const std::experimental::basic_string_view<_CharT, _Traits>& __val) const _NOEXCEPT;
792 template<class _CharT, class _Traits>
794 hash<std::experimental::basic_string_view<_CharT, _Traits> >::operator()(
795 const std::experimental::basic_string_view<_CharT, _Traits>& __val) const _NOEXCEPT
797 return __do_string_hash(__val.data(), __val.data() + __val.size());
800 #if _LIBCPP_STD_VER > 11
801 template <class _CharT, class _Traits>
802 __quoted_output_proxy<_CharT, const _CharT *, _Traits>
803 quoted ( std::experimental::basic_string_view <_CharT, _Traits> __sv,
804 _CharT __delim = _CharT('"'), _CharT __escape=_CharT('\\'))
806 return __quoted_output_proxy<_CharT, const _CharT *, _Traits>
807 ( __sv.data(), __sv.data() + __sv.size(), __delim, __escape );
811 _LIBCPP_END_NAMESPACE_STD
813 #endif // _LIBCPP_LFTS_STRING_VIEW