1// -*- C++ -*- 2//===------------------------ string_view ---------------------------------===// 3// 4// The LLVM Compiler Infrastructure 5// 6// This file is distributed under the University of Illinois Open Source 7// License. See LICENSE.TXT for details. 8// 9//===----------------------------------------------------------------------===// 10 11#ifndef _LIBCPP_STRING_VIEW 12#define _LIBCPP_STRING_VIEW 13 14/* 15string_view synopsis 16 17namespace std { 18 19 // 7.2, Class template basic_string_view 20 template<class charT, class traits = char_traits<charT>> 21 class basic_string_view; 22 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 43 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); 49 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; 55 56 template<class charT, class traits = char_traits<charT>> 57 class basic_string_view { 58 public: 59 // types 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); 73 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); 81 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; 91 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; 97 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; 104 105 // 7.7, basic_string_view modifiers 106 constexpr void remove_prefix(size_type n); 107 constexpr void remove_suffix(size_type n); 108 constexpr void swap(basic_string_view& s) noexcept; 109 110 size_type copy(charT* s, size_type n, size_type pos = 0) const; 111 112 constexpr basic_string_view substr(size_type pos = 0, size_type n = npos) const; 113 constexpr int compare(basic_string_view s) const noexcept; 114 constexpr int compare(size_type pos1, size_type n1, basic_string_view s) const; 115 constexpr int compare(size_type pos1, size_type n1, 116 basic_string_view s, size_type pos2, size_type n2) const; 117 constexpr int compare(const charT* s) const; 118 constexpr int compare(size_type pos1, size_type n1, const charT* s) const; 119 constexpr int compare(size_type pos1, size_type n1, 120 const charT* s, size_type n2) const; 121 constexpr size_type find(basic_string_view s, size_type pos = 0) const noexcept; 122 constexpr size_type find(charT c, size_type pos = 0) const noexcept; 123 constexpr size_type find(const charT* s, size_type pos, size_type n) const; 124 constexpr size_type find(const charT* s, size_type pos = 0) const; 125 constexpr size_type rfind(basic_string_view s, size_type pos = npos) const noexcept; 126 constexpr size_type rfind(charT c, size_type pos = npos) const noexcept; 127 constexpr size_type rfind(const charT* s, size_type pos, size_type n) const; 128 constexpr size_type rfind(const charT* s, size_type pos = npos) const; 129 constexpr size_type find_first_of(basic_string_view s, size_type pos = 0) const noexcept; 130 constexpr size_type find_first_of(charT c, size_type pos = 0) const noexcept; 131 constexpr size_type find_first_of(const charT* s, size_type pos, size_type n) const; 132 constexpr size_type find_first_of(const charT* s, size_type pos = 0) const; 133 constexpr size_type find_last_of(basic_string_view s, size_type pos = npos) const noexcept; 134 constexpr size_type find_last_of(charT c, size_type pos = npos) const noexcept; 135 constexpr size_type find_last_of(const charT* s, size_type pos, size_type n) const; 136 constexpr size_type find_last_of(const charT* s, size_type pos = npos) const; 137 constexpr size_type find_first_not_of(basic_string_view s, size_type pos = 0) const noexcept; 138 constexpr size_type find_first_not_of(charT c, size_type pos = 0) const noexcept; 139 constexpr size_type find_first_not_of(const charT* s, size_type pos, size_type n) const; 140 constexpr size_type find_first_not_of(const charT* s, size_type pos = 0) const; 141 constexpr size_type find_last_not_of(basic_string_view s, size_type pos = npos) const noexcept; 142 constexpr size_type find_last_not_of(charT c, size_type pos = npos) const noexcept; 143 constexpr size_type find_last_not_of(const charT* s, size_type pos, size_type n) const; 144 constexpr size_type find_last_not_of(const charT* s, size_type pos = npos) const; 145 146 private: 147 const_pointer data_; // exposition only 148 size_type size_; // exposition only 149 }; 150 151 // 7.11, Hash support 152 template <class T> struct hash; 153 template <> struct hash<string_view>; 154 template <> struct hash<u16string_view>; 155 template <> struct hash<u32string_view>; 156 template <> struct hash<wstring_view>; 157 158 constexpr basic_string<char> operator "" s( const char *str, size_t len ); // C++17 159 constexpr basic_string<wchar_t> operator "" s( const wchar_t *str, size_t len ); // C++17 160 constexpr basic_string<char16_t> operator "" s( const char16_t *str, size_t len ); // C++17 161 constexpr basic_string<char32_t> operator "" s( const char32_t *str, size_t len ); // C++17 162 163} // namespace std 164 165 166*/ 167 168#include <__config> 169#include <__string> 170#include <algorithm> 171#include <iterator> 172#include <limits> 173#include <stdexcept> 174#include <__debug> 175 176#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 177#pragma GCC system_header 178#endif 179 180_LIBCPP_PUSH_MACROS 181#include <__undef_macros> 182 183 184_LIBCPP_BEGIN_NAMESPACE_STD 185 186template<class _CharT, class _Traits = char_traits<_CharT> > 187class _LIBCPP_TEMPLATE_VIS basic_string_view { 188public: 189 // types 190 typedef _Traits traits_type; 191 typedef _CharT value_type; 192 typedef const _CharT* pointer; 193 typedef const _CharT* const_pointer; 194 typedef const _CharT& reference; 195 typedef const _CharT& const_reference; 196 typedef const_pointer const_iterator; // See [string.view.iterators] 197 typedef const_iterator iterator; 198 typedef _VSTD::reverse_iterator<const_iterator> const_reverse_iterator; 199 typedef const_reverse_iterator reverse_iterator; 200 typedef size_t size_type; 201 typedef ptrdiff_t difference_type; 202 static _LIBCPP_CONSTEXPR const size_type npos = -1; // size_type(-1); 203 204 static_assert(is_pod<value_type>::value, "Character type of basic_string_view must be a POD"); 205 static_assert((is_same<_CharT, typename traits_type::char_type>::value), 206 "traits_type::char_type must be the same type as CharT"); 207 208 // [string.view.cons], construct/copy 209 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY 210 basic_string_view() _NOEXCEPT : __data (nullptr), __size(0) {} 211 212 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY 213 basic_string_view(const basic_string_view&) _NOEXCEPT = default; 214 215 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 216 basic_string_view& operator=(const basic_string_view&) _NOEXCEPT = default; 217 218 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY 219 basic_string_view(const _CharT* __s, size_type __len) 220 : __data(__s), __size(__len) 221 { 222// #if _LIBCPP_STD_VER > 11 223// _LIBCPP_ASSERT(__len == 0 || __s != nullptr, "string_view::string_view(_CharT *, size_t): received nullptr"); 224// #endif 225 } 226 227 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY 228 basic_string_view(const _CharT* __s) 229 : __data(__s), __size(_Traits::length(__s)) {} 230 231 // [string.view.iterators], iterators 232 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY 233 const_iterator begin() const _NOEXCEPT { return cbegin(); } 234 235 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY 236 const_iterator end() const _NOEXCEPT { return cend(); } 237 238 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY 239 const_iterator cbegin() const _NOEXCEPT { return __data; } 240 241 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY 242 const_iterator cend() const _NOEXCEPT { return __data + __size; } 243 244 _LIBCPP_CONSTEXPR_AFTER_CXX14 _LIBCPP_INLINE_VISIBILITY 245 const_reverse_iterator rbegin() const _NOEXCEPT { return const_reverse_iterator(cend()); } 246 247 _LIBCPP_CONSTEXPR_AFTER_CXX14 _LIBCPP_INLINE_VISIBILITY 248 const_reverse_iterator rend() const _NOEXCEPT { return const_reverse_iterator(cbegin()); } 249 250 _LIBCPP_CONSTEXPR_AFTER_CXX14 _LIBCPP_INLINE_VISIBILITY 251 const_reverse_iterator crbegin() const _NOEXCEPT { return const_reverse_iterator(cend()); } 252 253 _LIBCPP_CONSTEXPR_AFTER_CXX14 _LIBCPP_INLINE_VISIBILITY 254 const_reverse_iterator crend() const _NOEXCEPT { return const_reverse_iterator(cbegin()); } 255 256 // [string.view.capacity], capacity 257 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY 258 size_type size() const _NOEXCEPT { return __size; } 259 260 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY 261 size_type length() const _NOEXCEPT { return __size; } 262 263 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY 264 size_type max_size() const _NOEXCEPT { return numeric_limits<size_type>::max(); } 265 266 _LIBCPP_CONSTEXPR bool _LIBCPP_INLINE_VISIBILITY 267 empty() const _NOEXCEPT { return __size == 0; } 268 269 // [string.view.access], element access 270 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY 271 const_reference operator[](size_type __pos) const _NOEXCEPT { return __data[__pos]; } 272 273 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY 274 const_reference at(size_type __pos) const 275 { 276 return __pos >= size() 277 ? (__throw_out_of_range("string_view::at"), __data[0]) 278 : __data[__pos]; 279 } 280 281 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY 282 const_reference front() const 283 { 284 return _LIBCPP_ASSERT(!empty(), "string_view::front(): string is empty"), __data[0]; 285 } 286 287 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY 288 const_reference back() const 289 { 290 return _LIBCPP_ASSERT(!empty(), "string_view::back(): string is empty"), __data[__size-1]; 291 } 292 293 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY 294 const_pointer data() const _NOEXCEPT { return __data; } 295 296 // [string.view.modifiers], modifiers: 297 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 298 void remove_prefix(size_type __n) _NOEXCEPT 299 { 300 _LIBCPP_ASSERT(__n <= size(), "remove_prefix() can't remove more than size()"); 301 __data += __n; 302 __size -= __n; 303 } 304 305 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 306 void remove_suffix(size_type __n) _NOEXCEPT 307 { 308 _LIBCPP_ASSERT(__n <= size(), "remove_suffix() can't remove more than size()"); 309 __size -= __n; 310 } 311 312 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 313 void swap(basic_string_view& __other) _NOEXCEPT 314 { 315 const value_type *__p = __data; 316 __data = __other.__data; 317 __other.__data = __p; 318 319 size_type __sz = __size; 320 __size = __other.__size; 321 __other.__size = __sz; 322 } 323 324 _LIBCPP_INLINE_VISIBILITY 325 size_type copy(_CharT* __s, size_type __n, size_type __pos = 0) const 326 { 327 if (__pos > size()) 328 __throw_out_of_range("string_view::copy"); 329 size_type __rlen = _VSTD::min(__n, size() - __pos); 330 _Traits::copy(__s, data() + __pos, __rlen); 331 return __rlen; 332 } 333 334 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY 335 basic_string_view substr(size_type __pos = 0, size_type __n = npos) const 336 { 337 return __pos > size() 338 ? (__throw_out_of_range("string_view::substr"), basic_string_view()) 339 : basic_string_view(data() + __pos, _VSTD::min(__n, size() - __pos)); 340 } 341 342 _LIBCPP_CONSTEXPR_AFTER_CXX11 int compare(basic_string_view __sv) const _NOEXCEPT 343 { 344 size_type __rlen = _VSTD::min( size(), __sv.size()); 345 int __retval = _Traits::compare(data(), __sv.data(), __rlen); 346 if ( __retval == 0 ) // first __rlen chars matched 347 __retval = size() == __sv.size() ? 0 : ( size() < __sv.size() ? -1 : 1 ); 348 return __retval; 349 } 350 351 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 352 int compare(size_type __pos1, size_type __n1, basic_string_view __sv) const 353 { 354 return substr(__pos1, __n1).compare(__sv); 355 } 356 357 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 358 int compare( size_type __pos1, size_type __n1, 359 basic_string_view __sv, size_type __pos2, size_type __n2) const 360 { 361 return substr(__pos1, __n1).compare(__sv.substr(__pos2, __n2)); 362 } 363 364 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 365 int compare(const _CharT* __s) const _NOEXCEPT 366 { 367 return compare(basic_string_view(__s)); 368 } 369 370 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 371 int compare(size_type __pos1, size_type __n1, const _CharT* __s) const 372 { 373 return substr(__pos1, __n1).compare(basic_string_view(__s)); 374 } 375 376 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 377 int compare(size_type __pos1, size_type __n1, const _CharT* __s, size_type __n2) const 378 { 379 return substr(__pos1, __n1).compare(basic_string_view(__s, __n2)); 380 } 381 382 // find 383 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 384 size_type find(basic_string_view __s, size_type __pos = 0) const _NOEXCEPT 385 { 386 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find(): received nullptr"); 387 return __str_find<value_type, size_type, traits_type, npos> 388 (data(), size(), __s.data(), __pos, __s.size()); 389 } 390 391 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 392 size_type find(_CharT __c, size_type __pos = 0) const _NOEXCEPT 393 { 394 return __str_find<value_type, size_type, traits_type, npos> 395 (data(), size(), __c, __pos); 396 } 397 398 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 399 size_type find(const _CharT* __s, size_type __pos, size_type __n) const 400 { 401 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find(): received nullptr"); 402 return __str_find<value_type, size_type, traits_type, npos> 403 (data(), size(), __s, __pos, __n); 404 } 405 406 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 407 size_type find(const _CharT* __s, size_type __pos = 0) const 408 { 409 _LIBCPP_ASSERT(__s != nullptr, "string_view::find(): received nullptr"); 410 return __str_find<value_type, size_type, traits_type, npos> 411 (data(), size(), __s, __pos, traits_type::length(__s)); 412 } 413 414 // rfind 415 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 416 size_type rfind(basic_string_view __s, size_type __pos = npos) const _NOEXCEPT 417 { 418 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find(): received nullptr"); 419 return __str_rfind<value_type, size_type, traits_type, npos> 420 (data(), size(), __s.data(), __pos, __s.size()); 421 } 422 423 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 424 size_type rfind(_CharT __c, size_type __pos = npos) const _NOEXCEPT 425 { 426 return __str_rfind<value_type, size_type, traits_type, npos> 427 (data(), size(), __c, __pos); 428 } 429 430 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 431 size_type rfind(const _CharT* __s, size_type __pos, size_type __n) const 432 { 433 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::rfind(): received nullptr"); 434 return __str_rfind<value_type, size_type, traits_type, npos> 435 (data(), size(), __s, __pos, __n); 436 } 437 438 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 439 size_type rfind(const _CharT* __s, size_type __pos=npos) const 440 { 441 _LIBCPP_ASSERT(__s != nullptr, "string_view::rfind(): received nullptr"); 442 return __str_rfind<value_type, size_type, traits_type, npos> 443 (data(), size(), __s, __pos, traits_type::length(__s)); 444 } 445 446 // find_first_of 447 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 448 size_type find_first_of(basic_string_view __s, size_type __pos = 0) const _NOEXCEPT 449 { 450 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_first_of(): received nullptr"); 451 return __str_find_first_of<value_type, size_type, traits_type, npos> 452 (data(), size(), __s.data(), __pos, __s.size()); 453 } 454 455 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 456 size_type find_first_of(_CharT __c, size_type __pos = 0) const _NOEXCEPT 457 { return find(__c, __pos); } 458 459 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 460 size_type find_first_of(const _CharT* __s, size_type __pos, size_type __n) const 461 { 462 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_first_of(): received nullptr"); 463 return __str_find_first_of<value_type, size_type, traits_type, npos> 464 (data(), size(), __s, __pos, __n); 465 } 466 467 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 468 size_type find_first_of(const _CharT* __s, size_type __pos=0) const 469 { 470 _LIBCPP_ASSERT(__s != nullptr, "string_view::find_first_of(): received nullptr"); 471 return __str_find_first_of<value_type, size_type, traits_type, npos> 472 (data(), size(), __s, __pos, traits_type::length(__s)); 473 } 474 475 // find_last_of 476 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 477 size_type find_last_of(basic_string_view __s, size_type __pos=npos) const _NOEXCEPT 478 { 479 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_last_of(): received nullptr"); 480 return __str_find_last_of<value_type, size_type, traits_type, npos> 481 (data(), size(), __s.data(), __pos, __s.size()); 482 } 483 484 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 485 size_type find_last_of(_CharT __c, size_type __pos = npos) const _NOEXCEPT 486 { return rfind(__c, __pos); } 487 488 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 489 size_type find_last_of(const _CharT* __s, size_type __pos, size_type __n) const 490 { 491 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_last_of(): received nullptr"); 492 return __str_find_last_of<value_type, size_type, traits_type, npos> 493 (data(), size(), __s, __pos, __n); 494 } 495 496 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 497 size_type find_last_of(const _CharT* __s, size_type __pos=npos) const 498 { 499 _LIBCPP_ASSERT(__s != nullptr, "string_view::find_last_of(): received nullptr"); 500 return __str_find_last_of<value_type, size_type, traits_type, npos> 501 (data(), size(), __s, __pos, traits_type::length(__s)); 502 } 503 504 // find_first_not_of 505 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 506 size_type find_first_not_of(basic_string_view __s, size_type __pos=0) const _NOEXCEPT 507 { 508 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_first_not_of(): received nullptr"); 509 return __str_find_first_not_of<value_type, size_type, traits_type, npos> 510 (data(), size(), __s.data(), __pos, __s.size()); 511 } 512 513 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 514 size_type find_first_not_of(_CharT __c, size_type __pos=0) const _NOEXCEPT 515 { 516 return __str_find_first_not_of<value_type, size_type, traits_type, npos> 517 (data(), size(), __c, __pos); 518 } 519 520 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 521 size_type find_first_not_of(const _CharT* __s, size_type __pos, size_type __n) const 522 { 523 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_first_not_of(): received nullptr"); 524 return __str_find_first_not_of<value_type, size_type, traits_type, npos> 525 (data(), size(), __s, __pos, __n); 526 } 527 528 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 529 size_type find_first_not_of(const _CharT* __s, size_type __pos=0) const 530 { 531 _LIBCPP_ASSERT(__s != nullptr, "string_view::find_first_not_of(): received nullptr"); 532 return __str_find_first_not_of<value_type, size_type, traits_type, npos> 533 (data(), size(), __s, __pos, traits_type::length(__s)); 534 } 535 536 // find_last_not_of 537 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 538 size_type find_last_not_of(basic_string_view __s, size_type __pos=npos) const _NOEXCEPT 539 { 540 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_last_not_of(): received nullptr"); 541 return __str_find_last_not_of<value_type, size_type, traits_type, npos> 542 (data(), size(), __s.data(), __pos, __s.size()); 543 } 544 545 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 546 size_type find_last_not_of(_CharT __c, size_type __pos=npos) const _NOEXCEPT 547 { 548 return __str_find_last_not_of<value_type, size_type, traits_type, npos> 549 (data(), size(), __c, __pos); 550 } 551 552 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 553 size_type find_last_not_of(const _CharT* __s, size_type __pos, size_type __n) const 554 { 555 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_last_not_of(): received nullptr"); 556 return __str_find_last_not_of<value_type, size_type, traits_type, npos> 557 (data(), size(), __s, __pos, __n); 558 } 559 560 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 561 size_type find_last_not_of(const _CharT* __s, size_type __pos=npos) const 562 { 563 _LIBCPP_ASSERT(__s != nullptr, "string_view::find_last_not_of(): received nullptr"); 564 return __str_find_last_not_of<value_type, size_type, traits_type, npos> 565 (data(), size(), __s, __pos, traits_type::length(__s)); 566 } 567 568private: 569 const value_type* __data; 570 size_type __size; 571}; 572 573 574// [string.view.comparison] 575// operator == 576template<class _CharT, class _Traits> 577_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 578bool operator==(basic_string_view<_CharT, _Traits> __lhs, 579 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 580{ 581 if ( __lhs.size() != __rhs.size()) return false; 582 return __lhs.compare(__rhs) == 0; 583} 584 585template<class _CharT, class _Traits> 586_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 587bool operator==(basic_string_view<_CharT, _Traits> __lhs, 588 typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT 589{ 590 if ( __lhs.size() != __rhs.size()) return false; 591 return __lhs.compare(__rhs) == 0; 592} 593 594template<class _CharT, class _Traits> 595_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 596bool operator==(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs, 597 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 598{ 599 if ( __lhs.size() != __rhs.size()) return false; 600 return __lhs.compare(__rhs) == 0; 601} 602 603 604// operator != 605template<class _CharT, class _Traits> 606_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 607bool operator!=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 608{ 609 if ( __lhs.size() != __rhs.size()) 610 return true; 611 return __lhs.compare(__rhs) != 0; 612} 613 614template<class _CharT, class _Traits> 615_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 616bool operator!=(basic_string_view<_CharT, _Traits> __lhs, 617 typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT 618{ 619 if ( __lhs.size() != __rhs.size()) 620 return true; 621 return __lhs.compare(__rhs) != 0; 622} 623 624template<class _CharT, class _Traits> 625_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 626bool operator!=(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs, 627 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 628{ 629 if ( __lhs.size() != __rhs.size()) 630 return true; 631 return __lhs.compare(__rhs) != 0; 632} 633 634 635// operator < 636template<class _CharT, class _Traits> 637_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 638bool operator<(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 639{ 640 return __lhs.compare(__rhs) < 0; 641} 642 643template<class _CharT, class _Traits> 644_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 645bool operator<(basic_string_view<_CharT, _Traits> __lhs, 646 typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT 647{ 648 return __lhs.compare(__rhs) < 0; 649} 650 651template<class _CharT, class _Traits> 652_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 653bool operator<(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs, 654 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 655{ 656 return __lhs.compare(__rhs) < 0; 657} 658 659 660// operator > 661template<class _CharT, class _Traits> 662_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 663bool operator> (basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 664{ 665 return __lhs.compare(__rhs) > 0; 666} 667 668template<class _CharT, class _Traits> 669_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 670bool operator>(basic_string_view<_CharT, _Traits> __lhs, 671 typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT 672{ 673 return __lhs.compare(__rhs) > 0; 674} 675 676template<class _CharT, class _Traits> 677_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 678bool operator>(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs, 679 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 680{ 681 return __lhs.compare(__rhs) > 0; 682} 683 684 685// operator <= 686template<class _CharT, class _Traits> 687_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 688bool operator<=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 689{ 690 return __lhs.compare(__rhs) <= 0; 691} 692 693template<class _CharT, class _Traits> 694_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 695bool operator<=(basic_string_view<_CharT, _Traits> __lhs, 696 typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT 697{ 698 return __lhs.compare(__rhs) <= 0; 699} 700 701template<class _CharT, class _Traits> 702_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 703bool operator<=(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs, 704 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 705{ 706 return __lhs.compare(__rhs) <= 0; 707} 708 709 710// operator >= 711template<class _CharT, class _Traits> 712_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 713bool operator>=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 714{ 715 return __lhs.compare(__rhs) >= 0; 716} 717 718 719template<class _CharT, class _Traits> 720_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 721bool operator>=(basic_string_view<_CharT, _Traits> __lhs, 722 typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT 723{ 724 return __lhs.compare(__rhs) >= 0; 725} 726 727template<class _CharT, class _Traits> 728_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 729bool operator>=(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs, 730 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 731{ 732 return __lhs.compare(__rhs) >= 0; 733} 734 735typedef basic_string_view<char> string_view; 736typedef basic_string_view<char16_t> u16string_view; 737typedef basic_string_view<char32_t> u32string_view; 738typedef basic_string_view<wchar_t> wstring_view; 739 740// [string.view.hash] 741template<class _CharT, class _Traits> 742struct _LIBCPP_TEMPLATE_VIS hash<basic_string_view<_CharT, _Traits> > 743 : public unary_function<basic_string_view<_CharT, _Traits>, size_t> 744{ 745 size_t operator()(const basic_string_view<_CharT, _Traits> __val) const _NOEXCEPT; 746}; 747 748template<class _CharT, class _Traits> 749size_t 750hash<basic_string_view<_CharT, _Traits> >::operator()( 751 const basic_string_view<_CharT, _Traits> __val) const _NOEXCEPT 752{ 753 return __do_string_hash(__val.data(), __val.data() + __val.size()); 754} 755 756 757#if _LIBCPP_STD_VER > 11 758inline namespace literals 759{ 760 inline namespace string_view_literals 761 { 762 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 763 basic_string_view<char> operator "" sv(const char *__str, size_t __len) 764 { 765 return basic_string_view<char> (__str, __len); 766 } 767 768 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 769 basic_string_view<wchar_t> operator "" sv(const wchar_t *__str, size_t __len) 770 { 771 return basic_string_view<wchar_t> (__str, __len); 772 } 773 774 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 775 basic_string_view<char16_t> operator "" sv(const char16_t *__str, size_t __len) 776 { 777 return basic_string_view<char16_t> (__str, __len); 778 } 779 780 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 781 basic_string_view<char32_t> operator "" sv(const char32_t *__str, size_t __len) 782 { 783 return basic_string_view<char32_t> (__str, __len); 784 } 785 } 786} 787#endif 788_LIBCPP_END_NAMESPACE_STD 789 790_LIBCPP_POP_MACROS 791 792#endif // _LIBCPP_STRING_VIEW 793