1// -*- C++ -*- 2//===----------------------------------------------------------------------===// 3// 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5// See https://llvm.org/LICENSE.txt for license information. 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP_STRING_VIEW 11#define _LIBCPP_STRING_VIEW 12 13// clang-format off 14 15/* 16 17 string_view synopsis 18 19#include <compare> 20 21namespace std { 22 23 // 7.2, Class template basic_string_view 24 template<class charT, class traits = char_traits<charT>> 25 class basic_string_view; 26 27 template<class charT, class traits> 28 inline constexpr bool ranges::enable_view<basic_string_view<charT, traits>> = true; 29 30 template<class charT, class traits> 31 inline constexpr bool ranges::enable_borrowed_range<basic_string_view<charT, traits>> = true; // C++20 32 33 // 7.9, basic_string_view non-member comparison functions 34 template<class charT, class traits> 35 constexpr bool operator==(basic_string_view<charT, traits> x, 36 basic_string_view<charT, traits> y) noexcept; 37 template<class charT, class traits> // Removed in C++20 38 constexpr bool operator!=(basic_string_view<charT, traits> x, 39 basic_string_view<charT, traits> y) noexcept; 40 template<class charT, class traits> // Removed in C++20 41 constexpr bool operator< (basic_string_view<charT, traits> x, 42 basic_string_view<charT, traits> y) noexcept; 43 template<class charT, class traits> // Removed in C++20 44 constexpr bool operator> (basic_string_view<charT, traits> x, 45 basic_string_view<charT, traits> y) noexcept; 46 template<class charT, class traits> // Removed in C++20 47 constexpr bool operator<=(basic_string_view<charT, traits> x, 48 basic_string_view<charT, traits> y) noexcept; 49 template<class charT, class traits> // Removed in C++20 50 constexpr bool operator>=(basic_string_view<charT, traits> x, 51 basic_string_view<charT, traits> y) noexcept; 52 template<class charT, class traits> // Since C++20 53 constexpr see below operator<=>(basic_string_view<charT, traits> x, 54 basic_string_view<charT, traits> y) noexcept; 55 56 // see below, sufficient additional overloads of comparison functions 57 58 // 7.10, Inserters and extractors 59 template<class charT, class traits> 60 basic_ostream<charT, traits>& 61 operator<<(basic_ostream<charT, traits>& os, 62 basic_string_view<charT, traits> str); 63 64 // basic_string_view typedef names 65 typedef basic_string_view<char> string_view; 66 typedef basic_string_view<char8_t> u8string_view; // C++20 67 typedef basic_string_view<char16_t> u16string_view; 68 typedef basic_string_view<char32_t> u32string_view; 69 typedef basic_string_view<wchar_t> wstring_view; 70 71 template<class charT, class traits = char_traits<charT>> 72 class basic_string_view { 73 public: 74 // types 75 typedef traits traits_type; 76 typedef charT value_type; 77 typedef charT* pointer; 78 typedef const charT* const_pointer; 79 typedef charT& reference; 80 typedef const charT& const_reference; 81 typedef implementation-defined const_iterator; 82 typedef const_iterator iterator; 83 typedef reverse_iterator<const_iterator> const_reverse_iterator; 84 typedef const_reverse_iterator reverse_iterator; 85 typedef size_t size_type; 86 typedef ptrdiff_t difference_type; 87 static constexpr size_type npos = size_type(-1); 88 89 // 7.3, basic_string_view constructors and assignment operators 90 constexpr basic_string_view() noexcept; 91 constexpr basic_string_view(const basic_string_view&) noexcept = default; 92 basic_string_view& operator=(const basic_string_view&) noexcept = default; 93 template<class Allocator> 94 constexpr basic_string_view(const charT* str); 95 basic_string_view(nullptr_t) = delete; // C++23 96 constexpr basic_string_view(const charT* str, size_type len); 97 template <class It, class End> 98 constexpr basic_string_view(It begin, End end); // C++20 99 template <class Range> 100 constexpr basic_string_view(Range&& r); // C++23 101 102 // 7.4, basic_string_view iterator support 103 constexpr const_iterator begin() const noexcept; 104 constexpr const_iterator end() const noexcept; 105 constexpr const_iterator cbegin() const noexcept; 106 constexpr const_iterator cend() const noexcept; 107 const_reverse_iterator rbegin() const noexcept; 108 const_reverse_iterator rend() const noexcept; 109 const_reverse_iterator crbegin() const noexcept; 110 const_reverse_iterator crend() const noexcept; 111 112 // 7.5, basic_string_view capacity 113 constexpr size_type size() const noexcept; 114 constexpr size_type length() const noexcept; 115 constexpr size_type max_size() const noexcept; 116 constexpr bool empty() const noexcept; 117 118 // 7.6, basic_string_view element access 119 constexpr const_reference operator[](size_type pos) const; 120 constexpr const_reference at(size_type pos) const; 121 constexpr const_reference front() const; 122 constexpr const_reference back() const; 123 constexpr const_pointer data() const noexcept; 124 125 // 7.7, basic_string_view modifiers 126 constexpr void remove_prefix(size_type n); 127 constexpr void remove_suffix(size_type n); 128 constexpr void swap(basic_string_view& s) noexcept; 129 130 size_type copy(charT* s, size_type n, size_type pos = 0) const; // constexpr in C++20 131 132 constexpr basic_string_view substr(size_type pos = 0, size_type n = npos) const; 133 constexpr int compare(basic_string_view s) const noexcept; 134 constexpr int compare(size_type pos1, size_type n1, basic_string_view s) const; 135 constexpr int compare(size_type pos1, size_type n1, 136 basic_string_view s, size_type pos2, size_type n2) const; 137 constexpr int compare(const charT* s) const; 138 constexpr int compare(size_type pos1, size_type n1, const charT* s) const; 139 constexpr int compare(size_type pos1, size_type n1, 140 const charT* s, size_type n2) const; 141 constexpr size_type find(basic_string_view s, size_type pos = 0) const noexcept; 142 constexpr size_type find(charT c, size_type pos = 0) const noexcept; 143 constexpr size_type find(const charT* s, size_type pos, size_type n) const noexcept; // noexcept as an extension 144 constexpr size_type find(const charT* s, size_type pos = 0) const noexcept; // noexcept as an extension 145 constexpr size_type rfind(basic_string_view s, size_type pos = npos) const noexcept; 146 constexpr size_type rfind(charT c, size_type pos = npos) const noexcept; 147 constexpr size_type rfind(const charT* s, size_type pos, size_type n) const noexcept; // noexcept as an extension 148 constexpr size_type rfind(const charT* s, size_type pos = npos) const noexcept; // noexcept as an extension 149 constexpr size_type find_first_of(basic_string_view s, size_type pos = 0) const noexcept; 150 constexpr size_type find_first_of(charT c, size_type pos = 0) const noexcept; 151 constexpr size_type find_first_of(const charT* s, size_type pos, size_type n) const noexcept; // noexcept as an extension 152 constexpr size_type find_first_of(const charT* s, size_type pos = 0) const noexcept; // noexcept as an extension 153 constexpr size_type find_last_of(basic_string_view s, size_type pos = npos) const noexcept; 154 constexpr size_type find_last_of(charT c, size_type pos = npos) const noexcept; 155 constexpr size_type find_last_of(const charT* s, size_type pos, size_type n) const noexcept; // noexcept as an extension 156 constexpr size_type find_last_of(const charT* s, size_type pos = npos) const noexcept; // noexcept as an extension 157 constexpr size_type find_first_not_of(basic_string_view s, size_type pos = 0) const noexcept; 158 constexpr size_type find_first_not_of(charT c, size_type pos = 0) const noexcept; 159 constexpr size_type find_first_not_of(const charT* s, size_type pos, size_type n) const noexcept; // noexcept as an extension 160 constexpr size_type find_first_not_of(const charT* s, size_type pos = 0) const noexcept; // noexcept as an extension 161 constexpr size_type find_last_not_of(basic_string_view s, size_type pos = npos) const noexcept; 162 constexpr size_type find_last_not_of(charT c, size_type pos = npos) const noexcept; 163 constexpr size_type find_last_not_of(const charT* s, size_type pos, size_type n) const noexcept; // noexcept as an extension 164 constexpr size_type find_last_not_of(const charT* s, size_type pos = npos) const noexcept; // noexcept as an extension 165 166 constexpr bool starts_with(basic_string_view s) const noexcept; // C++20 167 constexpr bool starts_with(charT c) const noexcept; // C++20 168 constexpr bool starts_with(const charT* s) const; // C++20 169 constexpr bool ends_with(basic_string_view s) const noexcept; // C++20 170 constexpr bool ends_with(charT c) const noexcept; // C++20 171 constexpr bool ends_with(const charT* s) const; // C++20 172 173 constexpr bool contains(basic_string_view s) const noexcept; // C++23 174 constexpr bool contains(charT c) const noexcept; // C++23 175 constexpr bool contains(const charT* s) const; // C++23 176 177 private: 178 const_pointer data_; // exposition only 179 size_type size_; // exposition only 180 }; 181 182 // basic_string_view deduction guides 183 template<class It, class End> 184 basic_string_view(It, End) -> basic_string_view<iter_value_t<It>>; // C++20 185 template<class Range> 186 basic_string_view(Range&&) -> basic_string_view<ranges::range_value_t<Range>>; // C++23 187 188 // 7.11, Hash support 189 template <class T> struct hash; 190 template <> struct hash<string_view>; 191 template <> struct hash<u8string_view>; // C++20 192 template <> struct hash<u16string_view>; 193 template <> struct hash<u32string_view>; 194 template <> struct hash<wstring_view>; 195 196 constexpr basic_string_view<char> operator""sv(const char *str, size_t len) noexcept; 197 constexpr basic_string_view<wchar_t> operator""sv(const wchar_t *str, size_t len) noexcept; 198 constexpr basic_string_view<char8_t> operator""sv(const char8_t *str, size_t len) noexcept; // C++20 199 constexpr basic_string_view<char16_t> operator""sv(const char16_t *str, size_t len) noexcept; 200 constexpr basic_string_view<char32_t> operator""sv(const char32_t *str, size_t len) noexcept; 201 202} // namespace std 203 204*/ 205 206// clang-format on 207 208#include <__algorithm/min.h> 209#include <__assert> // all public C++ headers provide the assertion handler 210#include <__config> 211#include <__functional/hash.h> 212#include <__functional/unary_function.h> 213#include <__fwd/string_view.h> 214#include <__iterator/bounded_iter.h> 215#include <__iterator/concepts.h> 216#include <__iterator/iterator_traits.h> 217#include <__iterator/reverse_iterator.h> 218#include <__memory/pointer_traits.h> 219#include <__ranges/concepts.h> 220#include <__ranges/data.h> 221#include <__ranges/enable_borrowed_range.h> 222#include <__ranges/enable_view.h> 223#include <__ranges/size.h> 224#include <__string/char_traits.h> 225#include <__type_traits/is_array.h> 226#include <__type_traits/is_convertible.h> 227#include <__type_traits/is_same.h> 228#include <__type_traits/is_standard_layout.h> 229#include <__type_traits/is_trivial.h> 230#include <__type_traits/remove_cvref.h> 231#include <__type_traits/remove_reference.h> 232#include <__type_traits/type_identity.h> 233#include <cstddef> 234#include <iosfwd> 235#include <limits> 236#include <stdexcept> 237#include <version> 238 239// standard-mandated includes 240 241// [iterator.range] 242#include <__iterator/access.h> 243#include <__iterator/data.h> 244#include <__iterator/empty.h> 245#include <__iterator/reverse_access.h> 246#include <__iterator/size.h> 247 248// [string.view.synop] 249#include <compare> 250 251#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 252# pragma GCC system_header 253#endif 254 255_LIBCPP_PUSH_MACROS 256#include <__undef_macros> 257 258 259_LIBCPP_BEGIN_NAMESPACE_STD 260 261// TODO: This is a workaround for some vendors to carry a downstream diff to accept `nullptr` in 262// string_view constructors. This can be refactored when this exact form isn't needed anymore. 263template <class _Traits> 264_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR 265inline size_t __char_traits_length_checked(const typename _Traits::char_type* __s) _NOEXCEPT { 266 // This needs to be a single statement for C++11 constexpr 267 return _LIBCPP_ASSERT_NON_NULL( 268 __s != nullptr, "null pointer passed to non-null argument of char_traits<...>::length"), 269 _Traits::length(__s); 270} 271 272template<class _CharT, class _Traits> 273class basic_string_view { 274public: 275 // types 276 using traits_type = _Traits; 277 using value_type = _CharT; 278 using pointer = _CharT*; 279 using const_pointer = const _CharT*; 280 using reference = _CharT&; 281 using const_reference = const _CharT&; 282#ifdef _LIBCPP_ABI_BOUNDED_ITERATORS 283 using const_iterator = __bounded_iter<const_pointer>; 284#else 285 using const_iterator = const_pointer; // See [string.view.iterators] 286#endif 287 using iterator = const_iterator; 288 using const_reverse_iterator = std::reverse_iterator<const_iterator>; 289 using reverse_iterator = const_reverse_iterator; 290 using size_type = size_t; 291 using difference_type = ptrdiff_t; 292 static _LIBCPP_CONSTEXPR const size_type npos = -1; // size_type(-1); 293 294 static_assert((!is_array<value_type>::value), "Character type of basic_string_view must not be an array"); 295 static_assert(( is_standard_layout<value_type>::value), "Character type of basic_string_view must be standard-layout"); 296 static_assert(( is_trivial<value_type>::value), "Character type of basic_string_view must be trivial"); 297 static_assert((is_same<_CharT, typename traits_type::char_type>::value), 298 "traits_type::char_type must be the same type as CharT"); 299 300 // [string.view.cons], construct/copy 301 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI 302 basic_string_view() _NOEXCEPT : __data_(nullptr), __size_(0) {} 303 304 _LIBCPP_HIDE_FROM_ABI 305 basic_string_view(const basic_string_view&) _NOEXCEPT = default; 306 307 _LIBCPP_HIDE_FROM_ABI 308 basic_string_view& operator=(const basic_string_view&) _NOEXCEPT = default; 309 310 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI 311 basic_string_view(const _CharT* __s, size_type __len) _NOEXCEPT 312 : __data_(__s), __size_(__len) 313 { 314#if _LIBCPP_STD_VER >= 14 315 _LIBCPP_ASSERT_UNCATEGORIZED( 316 __len <= static_cast<size_type>(numeric_limits<difference_type>::max()), 317 "string_view::string_view(_CharT *, size_t): length does not fit in difference_type"); 318 _LIBCPP_ASSERT_NON_NULL( 319 __len == 0 || __s != nullptr, "string_view::string_view(_CharT *, size_t): received nullptr"); 320#endif 321 } 322 323#if _LIBCPP_STD_VER >= 20 324 template <contiguous_iterator _It, sized_sentinel_for<_It> _End> 325 requires (is_same_v<iter_value_t<_It>, _CharT> && !is_convertible_v<_End, size_type>) 326 constexpr _LIBCPP_HIDE_FROM_ABI basic_string_view(_It __begin, _End __end) 327 : __data_(std::to_address(__begin)), __size_(__end - __begin) 328 { 329 _LIBCPP_ASSERT_VALID_INPUT_RANGE((__end - __begin) >= 0, 330 "std::string_view::string_view(iterator, sentinel) received invalid range"); 331 } 332#endif // _LIBCPP_STD_VER >= 20 333 334#if _LIBCPP_STD_VER >= 23 335 template <class _Range> 336 requires ( 337 !is_same_v<remove_cvref_t<_Range>, basic_string_view> && 338 ranges::contiguous_range<_Range> && 339 ranges::sized_range<_Range> && 340 is_same_v<ranges::range_value_t<_Range>, _CharT> && 341 !is_convertible_v<_Range, const _CharT*> && 342 (!requires(remove_cvref_t<_Range>& __d) { 343 __d.operator std::basic_string_view<_CharT, _Traits>(); 344 }) 345 ) 346 constexpr explicit _LIBCPP_HIDE_FROM_ABI 347 basic_string_view(_Range&& __r) : __data_(ranges::data(__r)), __size_(ranges::size(__r)) {} 348#endif // _LIBCPP_STD_VER >= 23 349 350 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI 351 basic_string_view(const _CharT* __s) 352 : __data_(__s), __size_(std::__char_traits_length_checked<_Traits>(__s)) {} 353 354#if _LIBCPP_STD_VER >= 23 355 basic_string_view(nullptr_t) = delete; 356#endif 357 358 // [string.view.iterators], iterators 359 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI 360 const_iterator begin() const _NOEXCEPT { return cbegin(); } 361 362 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI 363 const_iterator end() const _NOEXCEPT { return cend(); } 364 365 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI 366 const_iterator cbegin() const _NOEXCEPT { 367#ifdef _LIBCPP_ABI_BOUNDED_ITERATORS 368 return std::__make_bounded_iter(data(), data(), data() + size()); 369#else 370 return __data_; 371#endif 372 } 373 374 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI 375 const_iterator cend() const _NOEXCEPT { 376#ifdef _LIBCPP_ABI_BOUNDED_ITERATORS 377 return std::__make_bounded_iter(data() + size(), data(), data() + size()); 378#else 379 return __data_ + __size_; 380#endif 381 } 382 383 _LIBCPP_CONSTEXPR_SINCE_CXX17 _LIBCPP_HIDE_FROM_ABI 384 const_reverse_iterator rbegin() const _NOEXCEPT { return const_reverse_iterator(cend()); } 385 386 _LIBCPP_CONSTEXPR_SINCE_CXX17 _LIBCPP_HIDE_FROM_ABI 387 const_reverse_iterator rend() const _NOEXCEPT { return const_reverse_iterator(cbegin()); } 388 389 _LIBCPP_CONSTEXPR_SINCE_CXX17 _LIBCPP_HIDE_FROM_ABI 390 const_reverse_iterator crbegin() const _NOEXCEPT { return const_reverse_iterator(cend()); } 391 392 _LIBCPP_CONSTEXPR_SINCE_CXX17 _LIBCPP_HIDE_FROM_ABI 393 const_reverse_iterator crend() const _NOEXCEPT { return const_reverse_iterator(cbegin()); } 394 395 // [string.view.capacity], capacity 396 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI 397 size_type size() const _NOEXCEPT { return __size_; } 398 399 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI 400 size_type length() const _NOEXCEPT { return __size_; } 401 402 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI 403 size_type max_size() const _NOEXCEPT { return numeric_limits<size_type>::max() / sizeof(value_type); } 404 405 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR 406 bool empty() const _NOEXCEPT { return __size_ == 0; } 407 408 // [string.view.access], element access 409 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI 410 const_reference operator[](size_type __pos) const _NOEXCEPT { 411 return _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(__pos < size(), "string_view[] index out of bounds"), __data_[__pos]; 412 } 413 414 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI 415 const_reference at(size_type __pos) const 416 { 417 return __pos >= size() 418 ? (__throw_out_of_range("string_view::at"), __data_[0]) 419 : __data_[__pos]; 420 } 421 422 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI 423 const_reference front() const _NOEXCEPT 424 { 425 return _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string_view::front(): string is empty"), __data_[0]; 426 } 427 428 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI 429 const_reference back() const _NOEXCEPT 430 { 431 return _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string_view::back(): string is empty"), 432 __data_[__size_ - 1]; 433 } 434 435 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI 436 const_pointer data() const _NOEXCEPT { return __data_; } 437 438 // [string.view.modifiers], modifiers: 439 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 440 void remove_prefix(size_type __n) _NOEXCEPT 441 { 442 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(__n <= size(), "remove_prefix() can't remove more than size()"); 443 __data_ += __n; 444 __size_ -= __n; 445 } 446 447 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 448 void remove_suffix(size_type __n) _NOEXCEPT 449 { 450 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(__n <= size(), "remove_suffix() can't remove more than size()"); 451 __size_ -= __n; 452 } 453 454 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 455 void swap(basic_string_view& __other) _NOEXCEPT 456 { 457 const value_type *__p = __data_; 458 __data_ = __other.__data_; 459 __other.__data_ = __p; 460 461 size_type __sz = __size_; 462 __size_ = __other.__size_; 463 __other.__size_ = __sz; 464 } 465 466 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 467 size_type copy(_CharT* __s, size_type __n, size_type __pos = 0) const 468 { 469 if (__pos > size()) 470 __throw_out_of_range("string_view::copy"); 471 size_type __rlen = std::min(__n, size() - __pos); 472 _Traits::copy(__s, data() + __pos, __rlen); 473 return __rlen; 474 } 475 476 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI 477 basic_string_view substr(size_type __pos = 0, size_type __n = npos) const 478 { 479 return __pos > size() 480 ? (__throw_out_of_range("string_view::substr"), basic_string_view()) 481 : basic_string_view(data() + __pos, std::min(__n, size() - __pos)); 482 } 483 484 _LIBCPP_CONSTEXPR_SINCE_CXX14 int compare(basic_string_view __sv) const _NOEXCEPT 485 { 486 size_type __rlen = std::min(size(), __sv.size()); 487 int __retval = _Traits::compare(data(), __sv.data(), __rlen); 488 if (__retval == 0) // first __rlen chars matched 489 __retval = size() == __sv.size() ? 0 : (size() < __sv.size() ? -1 : 1); 490 return __retval; 491 } 492 493 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 494 int compare(size_type __pos1, size_type __n1, basic_string_view __sv) const 495 { 496 return substr(__pos1, __n1).compare(__sv); 497 } 498 499 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 500 int compare( size_type __pos1, size_type __n1, 501 basic_string_view __sv, size_type __pos2, size_type __n2) const 502 { 503 return substr(__pos1, __n1).compare(__sv.substr(__pos2, __n2)); 504 } 505 506 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 507 int compare(const _CharT* __s) const _NOEXCEPT 508 { 509 return compare(basic_string_view(__s)); 510 } 511 512 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 513 int compare(size_type __pos1, size_type __n1, const _CharT* __s) const 514 { 515 return substr(__pos1, __n1).compare(basic_string_view(__s)); 516 } 517 518 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 519 int compare(size_type __pos1, size_type __n1, const _CharT* __s, size_type __n2) const 520 { 521 return substr(__pos1, __n1).compare(basic_string_view(__s, __n2)); 522 } 523 524 // find 525 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 526 size_type find(basic_string_view __s, size_type __pos = 0) const _NOEXCEPT 527 { 528 _LIBCPP_ASSERT_NON_NULL(__s.size() == 0 || __s.data() != nullptr, "string_view::find(): received nullptr"); 529 return std::__str_find<value_type, size_type, traits_type, npos> 530 (data(), size(), __s.data(), __pos, __s.size()); 531 } 532 533 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 534 size_type find(_CharT __c, size_type __pos = 0) const _NOEXCEPT 535 { 536 return std::__str_find<value_type, size_type, traits_type, npos> 537 (data(), size(), __c, __pos); 538 } 539 540 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 541 size_type find(const _CharT* __s, size_type __pos, size_type __n) const _NOEXCEPT 542 { 543 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string_view::find(): received nullptr"); 544 return std::__str_find<value_type, size_type, traits_type, npos> 545 (data(), size(), __s, __pos, __n); 546 } 547 548 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 549 size_type find(const _CharT* __s, size_type __pos = 0) const _NOEXCEPT 550 { 551 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string_view::find(): received nullptr"); 552 return std::__str_find<value_type, size_type, traits_type, npos> 553 (data(), size(), __s, __pos, traits_type::length(__s)); 554 } 555 556 // rfind 557 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 558 size_type rfind(basic_string_view __s, size_type __pos = npos) const _NOEXCEPT 559 { 560 _LIBCPP_ASSERT_NON_NULL(__s.size() == 0 || __s.data() != nullptr, "string_view::find(): received nullptr"); 561 return std::__str_rfind<value_type, size_type, traits_type, npos> 562 (data(), size(), __s.data(), __pos, __s.size()); 563 } 564 565 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 566 size_type rfind(_CharT __c, size_type __pos = npos) const _NOEXCEPT 567 { 568 return std::__str_rfind<value_type, size_type, traits_type, npos> 569 (data(), size(), __c, __pos); 570 } 571 572 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 573 size_type rfind(const _CharT* __s, size_type __pos, size_type __n) const _NOEXCEPT 574 { 575 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string_view::rfind(): received nullptr"); 576 return std::__str_rfind<value_type, size_type, traits_type, npos> 577 (data(), size(), __s, __pos, __n); 578 } 579 580 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 581 size_type rfind(const _CharT* __s, size_type __pos=npos) const _NOEXCEPT 582 { 583 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string_view::rfind(): received nullptr"); 584 return std::__str_rfind<value_type, size_type, traits_type, npos> 585 (data(), size(), __s, __pos, traits_type::length(__s)); 586 } 587 588 // find_first_of 589 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 590 size_type find_first_of(basic_string_view __s, size_type __pos = 0) const _NOEXCEPT 591 { 592 _LIBCPP_ASSERT_NON_NULL( 593 __s.size() == 0 || __s.data() != nullptr, "string_view::find_first_of(): received nullptr"); 594 return std::__str_find_first_of<value_type, size_type, traits_type, npos> 595 (data(), size(), __s.data(), __pos, __s.size()); 596 } 597 598 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 599 size_type find_first_of(_CharT __c, size_type __pos = 0) const _NOEXCEPT 600 { return find(__c, __pos); } 601 602 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 603 size_type find_first_of(const _CharT* __s, size_type __pos, size_type __n) const _NOEXCEPT 604 { 605 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string_view::find_first_of(): received nullptr"); 606 return std::__str_find_first_of<value_type, size_type, traits_type, npos> 607 (data(), size(), __s, __pos, __n); 608 } 609 610 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 611 size_type find_first_of(const _CharT* __s, size_type __pos=0) const _NOEXCEPT 612 { 613 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string_view::find_first_of(): received nullptr"); 614 return std::__str_find_first_of<value_type, size_type, traits_type, npos> 615 (data(), size(), __s, __pos, traits_type::length(__s)); 616 } 617 618 // find_last_of 619 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 620 size_type find_last_of(basic_string_view __s, size_type __pos=npos) const _NOEXCEPT 621 { 622 _LIBCPP_ASSERT_NON_NULL( 623 __s.size() == 0 || __s.data() != nullptr, "string_view::find_last_of(): received nullptr"); 624 return std::__str_find_last_of<value_type, size_type, traits_type, npos> 625 (data(), size(), __s.data(), __pos, __s.size()); 626 } 627 628 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 629 size_type find_last_of(_CharT __c, size_type __pos = npos) const _NOEXCEPT 630 { return rfind(__c, __pos); } 631 632 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 633 size_type find_last_of(const _CharT* __s, size_type __pos, size_type __n) const _NOEXCEPT 634 { 635 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string_view::find_last_of(): received nullptr"); 636 return std::__str_find_last_of<value_type, size_type, traits_type, npos> 637 (data(), size(), __s, __pos, __n); 638 } 639 640 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 641 size_type find_last_of(const _CharT* __s, size_type __pos=npos) const _NOEXCEPT 642 { 643 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string_view::find_last_of(): received nullptr"); 644 return std::__str_find_last_of<value_type, size_type, traits_type, npos> 645 (data(), size(), __s, __pos, traits_type::length(__s)); 646 } 647 648 // find_first_not_of 649 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 650 size_type find_first_not_of(basic_string_view __s, size_type __pos=0) const _NOEXCEPT 651 { 652 _LIBCPP_ASSERT_NON_NULL( 653 __s.size() == 0 || __s.data() != nullptr, "string_view::find_first_not_of(): received nullptr"); 654 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos> 655 (data(), size(), __s.data(), __pos, __s.size()); 656 } 657 658 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 659 size_type find_first_not_of(_CharT __c, size_type __pos=0) const _NOEXCEPT 660 { 661 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos> 662 (data(), size(), __c, __pos); 663 } 664 665 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 666 size_type find_first_not_of(const _CharT* __s, size_type __pos, size_type __n) const _NOEXCEPT 667 { 668 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string_view::find_first_not_of(): received nullptr"); 669 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos> 670 (data(), size(), __s, __pos, __n); 671 } 672 673 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 674 size_type find_first_not_of(const _CharT* __s, size_type __pos=0) const _NOEXCEPT 675 { 676 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string_view::find_first_not_of(): received nullptr"); 677 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos> 678 (data(), size(), __s, __pos, traits_type::length(__s)); 679 } 680 681 // find_last_not_of 682 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 683 size_type find_last_not_of(basic_string_view __s, size_type __pos=npos) const _NOEXCEPT 684 { 685 _LIBCPP_ASSERT_NON_NULL( 686 __s.size() == 0 || __s.data() != nullptr, "string_view::find_last_not_of(): received nullptr"); 687 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos> 688 (data(), size(), __s.data(), __pos, __s.size()); 689 } 690 691 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 692 size_type find_last_not_of(_CharT __c, size_type __pos=npos) const _NOEXCEPT 693 { 694 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos> 695 (data(), size(), __c, __pos); 696 } 697 698 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 699 size_type find_last_not_of(const _CharT* __s, size_type __pos, size_type __n) const _NOEXCEPT 700 { 701 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string_view::find_last_not_of(): received nullptr"); 702 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos> 703 (data(), size(), __s, __pos, __n); 704 } 705 706 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 707 size_type find_last_not_of(const _CharT* __s, size_type __pos=npos) const _NOEXCEPT 708 { 709 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string_view::find_last_not_of(): received nullptr"); 710 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos> 711 (data(), size(), __s, __pos, traits_type::length(__s)); 712 } 713 714#if _LIBCPP_STD_VER >= 20 715 constexpr _LIBCPP_HIDE_FROM_ABI 716 bool starts_with(basic_string_view __s) const noexcept 717 { return size() >= __s.size() && compare(0, __s.size(), __s) == 0; } 718 719 constexpr _LIBCPP_HIDE_FROM_ABI 720 bool starts_with(value_type __c) const noexcept 721 { return !empty() && _Traits::eq(front(), __c); } 722 723 constexpr _LIBCPP_HIDE_FROM_ABI 724 bool starts_with(const value_type* __s) const noexcept 725 { return starts_with(basic_string_view(__s)); } 726 727 constexpr _LIBCPP_HIDE_FROM_ABI 728 bool ends_with(basic_string_view __s) const noexcept 729 { return size() >= __s.size() && compare(size() - __s.size(), npos, __s) == 0; } 730 731 constexpr _LIBCPP_HIDE_FROM_ABI 732 bool ends_with(value_type __c) const noexcept 733 { return !empty() && _Traits::eq(back(), __c); } 734 735 constexpr _LIBCPP_HIDE_FROM_ABI 736 bool ends_with(const value_type* __s) const noexcept 737 { return ends_with(basic_string_view(__s)); } 738#endif 739 740#if _LIBCPP_STD_VER >= 23 741 constexpr _LIBCPP_HIDE_FROM_ABI 742 bool contains(basic_string_view __sv) const noexcept 743 { return find(__sv) != npos; } 744 745 constexpr _LIBCPP_HIDE_FROM_ABI 746 bool contains(value_type __c) const noexcept 747 { return find(__c) != npos; } 748 749 constexpr _LIBCPP_HIDE_FROM_ABI 750 bool contains(const value_type* __s) const 751 { return find(__s) != npos; } 752#endif 753 754private: 755 const value_type* __data_; 756 size_type __size_; 757}; 758_LIBCPP_CTAD_SUPPORTED_FOR_TYPE(basic_string_view); 759 760#if _LIBCPP_STD_VER >= 20 761template <class _CharT, class _Traits> 762inline constexpr bool ranges::enable_view<basic_string_view<_CharT, _Traits>> = true; 763 764template <class _CharT, class _Traits> 765inline constexpr bool ranges::enable_borrowed_range<basic_string_view<_CharT, _Traits> > = true; 766#endif // _LIBCPP_STD_VER >= 20 767 768// [string.view.deduct] 769 770#if _LIBCPP_STD_VER >= 20 771template <contiguous_iterator _It, sized_sentinel_for<_It> _End> 772 basic_string_view(_It, _End) -> basic_string_view<iter_value_t<_It>>; 773#endif // _LIBCPP_STD_VER >= 20 774 775 776#if _LIBCPP_STD_VER >= 23 777template <ranges::contiguous_range _Range> 778 basic_string_view(_Range) -> basic_string_view<ranges::range_value_t<_Range>>; 779#endif 780 781// [string.view.comparison] 782 783#if _LIBCPP_STD_VER >= 20 784 785template<class _CharT, class _Traits> 786_LIBCPP_HIDE_FROM_ABI constexpr 787bool operator==(basic_string_view<_CharT, _Traits> __lhs, 788 type_identity_t<basic_string_view<_CharT, _Traits>> __rhs) noexcept { 789 if (__lhs.size() != __rhs.size()) return false; 790 return __lhs.compare(__rhs) == 0; 791} 792 793template <class _CharT, class _Traits> 794_LIBCPP_HIDE_FROM_ABI constexpr auto operator<=>( 795 basic_string_view<_CharT, _Traits> __lhs, type_identity_t<basic_string_view<_CharT, _Traits>> __rhs) noexcept { 796 if constexpr (requires { typename _Traits::comparison_category; }) { 797 // [string.view]/4 798 static_assert( 799 __comparison_category<typename _Traits::comparison_category>, 800 "return type is not a comparison category type"); 801 return static_cast<typename _Traits::comparison_category>(__lhs.compare(__rhs) <=> 0); 802 } else { 803 return static_cast<weak_ordering>(__lhs.compare(__rhs) <=> 0); 804 } 805} 806 807#else 808 809// operator == 810 811template<class _CharT, class _Traits> 812_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 813bool operator==(basic_string_view<_CharT, _Traits> __lhs, 814 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 815{ 816 if (__lhs.size() != __rhs.size()) return false; 817 return __lhs.compare(__rhs) == 0; 818} 819 820// The dummy default template parameters are used to work around a MSVC issue with mangling, see VSO-409326 for details. 821// This applies to the other sufficient overloads below for the other comparison operators. 822template<class _CharT, class _Traits, int = 1> 823_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 824bool operator==(basic_string_view<_CharT, _Traits> __lhs, 825 __type_identity_t<basic_string_view<_CharT, _Traits> > __rhs) _NOEXCEPT 826{ 827 if (__lhs.size() != __rhs.size()) return false; 828 return __lhs.compare(__rhs) == 0; 829} 830 831template<class _CharT, class _Traits, int = 2> 832_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 833bool operator==(__type_identity_t<basic_string_view<_CharT, _Traits> > __lhs, 834 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 835{ 836 if (__lhs.size() != __rhs.size()) return false; 837 return __lhs.compare(__rhs) == 0; 838} 839 840// operator != 841template<class _CharT, class _Traits> 842_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 843bool operator!=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 844{ 845 if (__lhs.size() != __rhs.size()) 846 return true; 847 return __lhs.compare(__rhs) != 0; 848} 849 850template<class _CharT, class _Traits, int = 1> 851_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 852bool operator!=(basic_string_view<_CharT, _Traits> __lhs, 853 __type_identity_t<basic_string_view<_CharT, _Traits> > __rhs) _NOEXCEPT 854{ 855 if (__lhs.size() != __rhs.size()) 856 return true; 857 return __lhs.compare(__rhs) != 0; 858} 859 860template<class _CharT, class _Traits, int = 2> 861_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 862bool operator!=(__type_identity_t<basic_string_view<_CharT, _Traits> > __lhs, 863 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 864{ 865 if (__lhs.size() != __rhs.size()) 866 return true; 867 return __lhs.compare(__rhs) != 0; 868} 869 870 871// operator < 872template<class _CharT, class _Traits> 873_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 874bool operator<(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 875{ 876 return __lhs.compare(__rhs) < 0; 877} 878 879template<class _CharT, class _Traits, int = 1> 880_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 881bool operator<(basic_string_view<_CharT, _Traits> __lhs, 882 __type_identity_t<basic_string_view<_CharT, _Traits> > __rhs) _NOEXCEPT 883{ 884 return __lhs.compare(__rhs) < 0; 885} 886 887template<class _CharT, class _Traits, int = 2> 888_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 889bool operator<(__type_identity_t<basic_string_view<_CharT, _Traits> > __lhs, 890 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 891{ 892 return __lhs.compare(__rhs) < 0; 893} 894 895 896// operator > 897template<class _CharT, class _Traits> 898_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 899bool operator> (basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 900{ 901 return __lhs.compare(__rhs) > 0; 902} 903 904template<class _CharT, class _Traits, int = 1> 905_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 906bool operator>(basic_string_view<_CharT, _Traits> __lhs, 907 __type_identity_t<basic_string_view<_CharT, _Traits> > __rhs) _NOEXCEPT 908{ 909 return __lhs.compare(__rhs) > 0; 910} 911 912template<class _CharT, class _Traits, int = 2> 913_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 914bool operator>(__type_identity_t<basic_string_view<_CharT, _Traits> > __lhs, 915 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 916{ 917 return __lhs.compare(__rhs) > 0; 918} 919 920 921// operator <= 922template<class _CharT, class _Traits> 923_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 924bool operator<=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 925{ 926 return __lhs.compare(__rhs) <= 0; 927} 928 929template<class _CharT, class _Traits, int = 1> 930_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 931bool operator<=(basic_string_view<_CharT, _Traits> __lhs, 932 __type_identity_t<basic_string_view<_CharT, _Traits> > __rhs) _NOEXCEPT 933{ 934 return __lhs.compare(__rhs) <= 0; 935} 936 937template<class _CharT, class _Traits, int = 2> 938_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 939bool operator<=(__type_identity_t<basic_string_view<_CharT, _Traits> > __lhs, 940 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 941{ 942 return __lhs.compare(__rhs) <= 0; 943} 944 945 946// operator >= 947template<class _CharT, class _Traits> 948_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 949bool operator>=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 950{ 951 return __lhs.compare(__rhs) >= 0; 952} 953 954 955template<class _CharT, class _Traits, int = 1> 956_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 957bool operator>=(basic_string_view<_CharT, _Traits> __lhs, 958 __type_identity_t<basic_string_view<_CharT, _Traits> > __rhs) _NOEXCEPT 959{ 960 return __lhs.compare(__rhs) >= 0; 961} 962 963template<class _CharT, class _Traits, int = 2> 964_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI 965bool operator>=(__type_identity_t<basic_string_view<_CharT, _Traits> > __lhs, 966 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT 967{ 968 return __lhs.compare(__rhs) >= 0; 969} 970 971#endif // _LIBCPP_STD_VER >= 20 972 973template<class _CharT, class _Traits> 974_LIBCPP_HIDE_FROM_ABI basic_ostream<_CharT, _Traits>& 975operator<<(basic_ostream<_CharT, _Traits>& __os, 976 basic_string_view<_CharT, _Traits> __str); 977 978// [string.view.hash] 979template<class _CharT> 980struct __string_view_hash : public __unary_function<basic_string_view<_CharT, char_traits<_CharT> >, size_t> 981{ 982 _LIBCPP_HIDE_FROM_ABI 983 size_t operator()(const basic_string_view<_CharT, char_traits<_CharT> > __val) const _NOEXCEPT { 984 return std::__do_string_hash(__val.data(), __val.data() + __val.size()); 985 } 986}; 987 988template <> 989struct hash<basic_string_view<char, char_traits<char> > > : __string_view_hash<char> {}; 990 991#ifndef _LIBCPP_HAS_NO_CHAR8_T 992template <> 993struct hash<basic_string_view<char8_t, char_traits<char8_t> > > : __string_view_hash<char8_t> {}; 994#endif 995 996template <> 997struct hash<basic_string_view<char16_t, char_traits<char16_t> > > : __string_view_hash<char16_t> {}; 998 999template <> 1000struct hash<basic_string_view<char32_t, char_traits<char32_t> > > : __string_view_hash<char32_t> {}; 1001 1002#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 1003template <> 1004struct hash<basic_string_view<wchar_t, char_traits<wchar_t> > > : __string_view_hash<wchar_t> {}; 1005#endif 1006 1007#if _LIBCPP_STD_VER >= 14 1008inline namespace literals 1009{ 1010 inline namespace string_view_literals 1011 { 1012 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR 1013 basic_string_view<char> operator""sv(const char *__str, size_t __len) _NOEXCEPT 1014 { 1015 return basic_string_view<char> (__str, __len); 1016 } 1017 1018#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 1019 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR 1020 basic_string_view<wchar_t> operator""sv(const wchar_t *__str, size_t __len) _NOEXCEPT 1021 { 1022 return basic_string_view<wchar_t> (__str, __len); 1023 } 1024#endif 1025 1026#ifndef _LIBCPP_HAS_NO_CHAR8_T 1027 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR 1028 basic_string_view<char8_t> operator""sv(const char8_t *__str, size_t __len) _NOEXCEPT 1029 { 1030 return basic_string_view<char8_t> (__str, __len); 1031 } 1032#endif 1033 1034 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR 1035 basic_string_view<char16_t> operator""sv(const char16_t *__str, size_t __len) _NOEXCEPT 1036 { 1037 return basic_string_view<char16_t> (__str, __len); 1038 } 1039 1040 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR 1041 basic_string_view<char32_t> operator""sv(const char32_t *__str, size_t __len) _NOEXCEPT 1042 { 1043 return basic_string_view<char32_t> (__str, __len); 1044 } 1045 } // namespace string_view_literals 1046} // namespace literals 1047#endif 1048_LIBCPP_END_NAMESPACE_STD 1049 1050_LIBCPP_POP_MACROS 1051 1052#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 1053# include <algorithm> 1054# include <concepts> 1055# include <cstdlib> 1056# include <iterator> 1057# include <type_traits> 1058#endif 1059 1060#endif // _LIBCPP_STRING_VIEW 1061