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_LIBCPP_BEGIN_NAMESPACE_STD 259 260// TODO: This is a workaround for some vendors to carry a downstream diff to accept `nullptr` in 261// string_view constructors. This can be refactored when this exact form isn't needed anymore. 262template <class _Traits> 263_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR inline size_t 264__char_traits_length_checked(const typename _Traits::char_type* __s) _NOEXCEPT { 265 // This needs to be a single statement for C++11 constexpr 266 return _LIBCPP_ASSERT_NON_NULL( 267 __s != nullptr, "null pointer passed to non-null argument of char_traits<...>::length"), 268 _Traits::length(__s); 269} 270 271template <class _CharT, class _Traits> 272class basic_string_view { 273public: 274 // types 275 using traits_type = _Traits; 276 using value_type = _CharT; 277 using pointer = _CharT*; 278 using const_pointer = const _CharT*; 279 using reference = _CharT&; 280 using const_reference = const _CharT&; 281#ifdef _LIBCPP_ABI_BOUNDED_ITERATORS 282 using const_iterator = __bounded_iter<const_pointer>; 283#else 284 using const_iterator = const_pointer; // See [string.view.iterators] 285#endif 286 using iterator = const_iterator; 287 using const_reverse_iterator = std::reverse_iterator<const_iterator>; 288 using reverse_iterator = const_reverse_iterator; 289 using size_type = size_t; 290 using difference_type = ptrdiff_t; 291 static _LIBCPP_CONSTEXPR const size_type npos = -1; // size_type(-1); 292 293 static_assert((!is_array<value_type>::value), "Character type of basic_string_view must not be an array"); 294 static_assert((is_standard_layout<value_type>::value), "Character type of basic_string_view must be standard-layout"); 295 static_assert((is_trivial<value_type>::value), "Character type of basic_string_view must be trivial"); 296 static_assert((is_same<_CharT, typename traits_type::char_type>::value), 297 "traits_type::char_type must be the same type as CharT"); 298 299 // [string.view.cons], construct/copy 300 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI basic_string_view() _NOEXCEPT : __data_(nullptr), __size_(0) {} 301 302 _LIBCPP_HIDE_FROM_ABI basic_string_view(const basic_string_view&) _NOEXCEPT = default; 303 304 _LIBCPP_HIDE_FROM_ABI basic_string_view& operator=(const basic_string_view&) _NOEXCEPT = default; 305 306 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI basic_string_view(const _CharT* __s, size_type __len) _NOEXCEPT 307 : __data_(__s), 308 __size_(__len) { 309#if _LIBCPP_STD_VER >= 14 310 _LIBCPP_ASSERT_UNCATEGORIZED(__len <= static_cast<size_type>(numeric_limits<difference_type>::max()), 311 "string_view::string_view(_CharT *, size_t): length does not fit in difference_type"); 312 _LIBCPP_ASSERT_NON_NULL( 313 __len == 0 || __s != nullptr, "string_view::string_view(_CharT *, size_t): received nullptr"); 314#endif 315 } 316 317#if _LIBCPP_STD_VER >= 20 318 template <contiguous_iterator _It, sized_sentinel_for<_It> _End> 319 requires(is_same_v<iter_value_t<_It>, _CharT> && !is_convertible_v<_End, size_type>) 320 constexpr _LIBCPP_HIDE_FROM_ABI basic_string_view(_It __begin, _End __end) 321 : __data_(std::to_address(__begin)), __size_(__end - __begin) { 322 _LIBCPP_ASSERT_VALID_INPUT_RANGE( 323 (__end - __begin) >= 0, "std::string_view::string_view(iterator, sentinel) received invalid range"); 324 } 325#endif // _LIBCPP_STD_VER >= 20 326 327#if _LIBCPP_STD_VER >= 23 328 template <class _Range> 329 requires(!is_same_v<remove_cvref_t<_Range>, basic_string_view> && ranges::contiguous_range<_Range> && 330 ranges::sized_range<_Range> && is_same_v<ranges::range_value_t<_Range>, _CharT> && 331 !is_convertible_v<_Range, const _CharT*> && 332 (!requires(remove_cvref_t<_Range>& __d) { __d.operator std::basic_string_view<_CharT, _Traits>(); })) 333 constexpr explicit _LIBCPP_HIDE_FROM_ABI basic_string_view(_Range&& __r) 334 : __data_(ranges::data(__r)), __size_(ranges::size(__r)) {} 335#endif // _LIBCPP_STD_VER >= 23 336 337 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI basic_string_view(const _CharT* __s) 338 : __data_(__s), __size_(std::__char_traits_length_checked<_Traits>(__s)) {} 339 340#if _LIBCPP_STD_VER >= 23 341 basic_string_view(nullptr_t) = delete; 342#endif 343 344 // [string.view.iterators], iterators 345 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI const_iterator begin() const _NOEXCEPT { return cbegin(); } 346 347 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI const_iterator end() const _NOEXCEPT { return cend(); } 348 349 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI const_iterator cbegin() const _NOEXCEPT { 350#ifdef _LIBCPP_ABI_BOUNDED_ITERATORS 351 return std::__make_bounded_iter(data(), data(), data() + size()); 352#else 353 return __data_; 354#endif 355 } 356 357 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI const_iterator cend() const _NOEXCEPT { 358#ifdef _LIBCPP_ABI_BOUNDED_ITERATORS 359 return std::__make_bounded_iter(data() + size(), data(), data() + size()); 360#else 361 return __data_ + __size_; 362#endif 363 } 364 365 _LIBCPP_CONSTEXPR_SINCE_CXX17 _LIBCPP_HIDE_FROM_ABI const_reverse_iterator rbegin() const _NOEXCEPT { 366 return const_reverse_iterator(cend()); 367 } 368 369 _LIBCPP_CONSTEXPR_SINCE_CXX17 _LIBCPP_HIDE_FROM_ABI const_reverse_iterator rend() const _NOEXCEPT { 370 return const_reverse_iterator(cbegin()); 371 } 372 373 _LIBCPP_CONSTEXPR_SINCE_CXX17 _LIBCPP_HIDE_FROM_ABI const_reverse_iterator crbegin() const _NOEXCEPT { 374 return const_reverse_iterator(cend()); 375 } 376 377 _LIBCPP_CONSTEXPR_SINCE_CXX17 _LIBCPP_HIDE_FROM_ABI const_reverse_iterator crend() const _NOEXCEPT { 378 return const_reverse_iterator(cbegin()); 379 } 380 381 // [string.view.capacity], capacity 382 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI size_type size() const _NOEXCEPT { return __size_; } 383 384 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI size_type length() const _NOEXCEPT { return __size_; } 385 386 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI size_type max_size() const _NOEXCEPT { 387 return numeric_limits<size_type>::max() / sizeof(value_type); 388 } 389 390 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool empty() const _NOEXCEPT { 391 return __size_ == 0; 392 } 393 394 // [string.view.access], element access 395 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI const_reference operator[](size_type __pos) const _NOEXCEPT { 396 return _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(__pos < size(), "string_view[] index out of bounds"), __data_[__pos]; 397 } 398 399 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI const_reference at(size_type __pos) const { 400 return __pos >= size() ? (__throw_out_of_range("string_view::at"), __data_[0]) : __data_[__pos]; 401 } 402 403 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI const_reference front() const _NOEXCEPT { 404 return _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string_view::front(): string is empty"), __data_[0]; 405 } 406 407 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI const_reference back() const _NOEXCEPT { 408 return _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string_view::back(): string is empty"), __data_[__size_ - 1]; 409 } 410 411 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI const_pointer data() const _NOEXCEPT { return __data_; } 412 413 // [string.view.modifiers], modifiers: 414 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI void remove_prefix(size_type __n) _NOEXCEPT { 415 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(__n <= size(), "remove_prefix() can't remove more than size()"); 416 __data_ += __n; 417 __size_ -= __n; 418 } 419 420 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI void remove_suffix(size_type __n) _NOEXCEPT { 421 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(__n <= size(), "remove_suffix() can't remove more than size()"); 422 __size_ -= __n; 423 } 424 425 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI void swap(basic_string_view& __other) _NOEXCEPT { 426 const value_type* __p = __data_; 427 __data_ = __other.__data_; 428 __other.__data_ = __p; 429 430 size_type __sz = __size_; 431 __size_ = __other.__size_; 432 __other.__size_ = __sz; 433 } 434 435 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 436 copy(_CharT* __s, size_type __n, size_type __pos = 0) const { 437 if (__pos > size()) 438 __throw_out_of_range("string_view::copy"); 439 size_type __rlen = std::min(__n, size() - __pos); 440 _Traits::copy(__s, data() + __pos, __rlen); 441 return __rlen; 442 } 443 444 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI basic_string_view substr(size_type __pos = 0, size_type __n = npos) const { 445 return __pos > size() ? (__throw_out_of_range("string_view::substr"), basic_string_view()) 446 : basic_string_view(data() + __pos, std::min(__n, size() - __pos)); 447 } 448 449 _LIBCPP_CONSTEXPR_SINCE_CXX14 int compare(basic_string_view __sv) const _NOEXCEPT { 450 size_type __rlen = std::min(size(), __sv.size()); 451 int __retval = _Traits::compare(data(), __sv.data(), __rlen); 452 if (__retval == 0) // first __rlen chars matched 453 __retval = size() == __sv.size() ? 0 : (size() < __sv.size() ? -1 : 1); 454 return __retval; 455 } 456 457 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI int 458 compare(size_type __pos1, size_type __n1, basic_string_view __sv) const { 459 return substr(__pos1, __n1).compare(__sv); 460 } 461 462 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI int 463 compare(size_type __pos1, size_type __n1, basic_string_view __sv, size_type __pos2, size_type __n2) const { 464 return substr(__pos1, __n1).compare(__sv.substr(__pos2, __n2)); 465 } 466 467 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI int compare(const _CharT* __s) const _NOEXCEPT { 468 return compare(basic_string_view(__s)); 469 } 470 471 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI int 472 compare(size_type __pos1, size_type __n1, const _CharT* __s) const { 473 return substr(__pos1, __n1).compare(basic_string_view(__s)); 474 } 475 476 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI int 477 compare(size_type __pos1, size_type __n1, const _CharT* __s, size_type __n2) const { 478 return substr(__pos1, __n1).compare(basic_string_view(__s, __n2)); 479 } 480 481 // find 482 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 483 find(basic_string_view __s, size_type __pos = 0) const _NOEXCEPT { 484 _LIBCPP_ASSERT_NON_NULL(__s.size() == 0 || __s.data() != nullptr, "string_view::find(): received nullptr"); 485 return std::__str_find<value_type, size_type, traits_type, npos>(data(), size(), __s.data(), __pos, __s.size()); 486 } 487 488 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type find(_CharT __c, size_type __pos = 0) const _NOEXCEPT { 489 return std::__str_find<value_type, size_type, traits_type, npos>(data(), size(), __c, __pos); 490 } 491 492 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 493 find(const _CharT* __s, size_type __pos, size_type __n) const _NOEXCEPT { 494 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string_view::find(): received nullptr"); 495 return std::__str_find<value_type, size_type, traits_type, npos>(data(), size(), __s, __pos, __n); 496 } 497 498 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 499 find(const _CharT* __s, size_type __pos = 0) const _NOEXCEPT { 500 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string_view::find(): received nullptr"); 501 return std::__str_find<value_type, size_type, traits_type, npos>( 502 data(), size(), __s, __pos, traits_type::length(__s)); 503 } 504 505 // rfind 506 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 507 rfind(basic_string_view __s, size_type __pos = npos) const _NOEXCEPT { 508 _LIBCPP_ASSERT_NON_NULL(__s.size() == 0 || __s.data() != nullptr, "string_view::find(): received nullptr"); 509 return std::__str_rfind<value_type, size_type, traits_type, npos>(data(), size(), __s.data(), __pos, __s.size()); 510 } 511 512 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 513 rfind(_CharT __c, size_type __pos = npos) const _NOEXCEPT { 514 return std::__str_rfind<value_type, size_type, traits_type, npos>(data(), size(), __c, __pos); 515 } 516 517 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 518 rfind(const _CharT* __s, size_type __pos, size_type __n) const _NOEXCEPT { 519 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string_view::rfind(): received nullptr"); 520 return std::__str_rfind<value_type, size_type, traits_type, npos>(data(), size(), __s, __pos, __n); 521 } 522 523 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 524 rfind(const _CharT* __s, size_type __pos = npos) const _NOEXCEPT { 525 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string_view::rfind(): received nullptr"); 526 return std::__str_rfind<value_type, size_type, traits_type, npos>( 527 data(), size(), __s, __pos, traits_type::length(__s)); 528 } 529 530 // find_first_of 531 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 532 find_first_of(basic_string_view __s, size_type __pos = 0) const _NOEXCEPT { 533 _LIBCPP_ASSERT_NON_NULL(__s.size() == 0 || __s.data() != nullptr, "string_view::find_first_of(): received nullptr"); 534 return std::__str_find_first_of<value_type, size_type, traits_type, npos>( 535 data(), size(), __s.data(), __pos, __s.size()); 536 } 537 538 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 539 find_first_of(_CharT __c, size_type __pos = 0) const _NOEXCEPT { 540 return find(__c, __pos); 541 } 542 543 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 544 find_first_of(const _CharT* __s, size_type __pos, size_type __n) const _NOEXCEPT { 545 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string_view::find_first_of(): received nullptr"); 546 return std::__str_find_first_of<value_type, size_type, traits_type, npos>(data(), size(), __s, __pos, __n); 547 } 548 549 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 550 find_first_of(const _CharT* __s, size_type __pos = 0) const _NOEXCEPT { 551 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string_view::find_first_of(): received nullptr"); 552 return std::__str_find_first_of<value_type, size_type, traits_type, npos>( 553 data(), size(), __s, __pos, traits_type::length(__s)); 554 } 555 556 // find_last_of 557 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 558 find_last_of(basic_string_view __s, size_type __pos = npos) const _NOEXCEPT { 559 _LIBCPP_ASSERT_NON_NULL(__s.size() == 0 || __s.data() != nullptr, "string_view::find_last_of(): received nullptr"); 560 return std::__str_find_last_of<value_type, size_type, traits_type, npos>( 561 data(), size(), __s.data(), __pos, __s.size()); 562 } 563 564 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 565 find_last_of(_CharT __c, size_type __pos = npos) const _NOEXCEPT { 566 return rfind(__c, __pos); 567 } 568 569 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 570 find_last_of(const _CharT* __s, size_type __pos, size_type __n) const _NOEXCEPT { 571 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string_view::find_last_of(): received nullptr"); 572 return std::__str_find_last_of<value_type, size_type, traits_type, npos>(data(), size(), __s, __pos, __n); 573 } 574 575 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 576 find_last_of(const _CharT* __s, size_type __pos = npos) const _NOEXCEPT { 577 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string_view::find_last_of(): received nullptr"); 578 return std::__str_find_last_of<value_type, size_type, traits_type, npos>( 579 data(), size(), __s, __pos, traits_type::length(__s)); 580 } 581 582 // find_first_not_of 583 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 584 find_first_not_of(basic_string_view __s, size_type __pos = 0) const _NOEXCEPT { 585 _LIBCPP_ASSERT_NON_NULL( 586 __s.size() == 0 || __s.data() != nullptr, "string_view::find_first_not_of(): received nullptr"); 587 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos>( 588 data(), size(), __s.data(), __pos, __s.size()); 589 } 590 591 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 592 find_first_not_of(_CharT __c, size_type __pos = 0) const _NOEXCEPT { 593 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos>(data(), size(), __c, __pos); 594 } 595 596 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 597 find_first_not_of(const _CharT* __s, size_type __pos, size_type __n) const _NOEXCEPT { 598 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string_view::find_first_not_of(): received nullptr"); 599 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos>(data(), size(), __s, __pos, __n); 600 } 601 602 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 603 find_first_not_of(const _CharT* __s, size_type __pos = 0) const _NOEXCEPT { 604 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string_view::find_first_not_of(): received nullptr"); 605 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos>( 606 data(), size(), __s, __pos, traits_type::length(__s)); 607 } 608 609 // find_last_not_of 610 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 611 find_last_not_of(basic_string_view __s, size_type __pos = npos) const _NOEXCEPT { 612 _LIBCPP_ASSERT_NON_NULL( 613 __s.size() == 0 || __s.data() != nullptr, "string_view::find_last_not_of(): received nullptr"); 614 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos>( 615 data(), size(), __s.data(), __pos, __s.size()); 616 } 617 618 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 619 find_last_not_of(_CharT __c, size_type __pos = npos) const _NOEXCEPT { 620 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos>(data(), size(), __c, __pos); 621 } 622 623 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 624 find_last_not_of(const _CharT* __s, size_type __pos, size_type __n) const _NOEXCEPT { 625 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string_view::find_last_not_of(): received nullptr"); 626 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos>(data(), size(), __s, __pos, __n); 627 } 628 629 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI size_type 630 find_last_not_of(const _CharT* __s, size_type __pos = npos) const _NOEXCEPT { 631 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string_view::find_last_not_of(): received nullptr"); 632 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos>( 633 data(), size(), __s, __pos, traits_type::length(__s)); 634 } 635 636#if _LIBCPP_STD_VER >= 20 637 constexpr _LIBCPP_HIDE_FROM_ABI bool starts_with(basic_string_view __s) const noexcept { 638 return size() >= __s.size() && compare(0, __s.size(), __s) == 0; 639 } 640 641 constexpr _LIBCPP_HIDE_FROM_ABI bool starts_with(value_type __c) const noexcept { 642 return !empty() && _Traits::eq(front(), __c); 643 } 644 645 constexpr _LIBCPP_HIDE_FROM_ABI bool starts_with(const value_type* __s) const noexcept { 646 return starts_with(basic_string_view(__s)); 647 } 648 649 constexpr _LIBCPP_HIDE_FROM_ABI bool ends_with(basic_string_view __s) const noexcept { 650 return size() >= __s.size() && compare(size() - __s.size(), npos, __s) == 0; 651 } 652 653 constexpr _LIBCPP_HIDE_FROM_ABI bool ends_with(value_type __c) const noexcept { 654 return !empty() && _Traits::eq(back(), __c); 655 } 656 657 constexpr _LIBCPP_HIDE_FROM_ABI bool ends_with(const value_type* __s) const noexcept { 658 return ends_with(basic_string_view(__s)); 659 } 660#endif 661 662#if _LIBCPP_STD_VER >= 23 663 constexpr _LIBCPP_HIDE_FROM_ABI bool contains(basic_string_view __sv) const noexcept { return find(__sv) != npos; } 664 665 constexpr _LIBCPP_HIDE_FROM_ABI bool contains(value_type __c) const noexcept { return find(__c) != npos; } 666 667 constexpr _LIBCPP_HIDE_FROM_ABI bool contains(const value_type* __s) const { return find(__s) != npos; } 668#endif 669 670private: 671 const value_type* __data_; 672 size_type __size_; 673}; 674_LIBCPP_CTAD_SUPPORTED_FOR_TYPE(basic_string_view); 675 676#if _LIBCPP_STD_VER >= 20 677template <class _CharT, class _Traits> 678inline constexpr bool ranges::enable_view<basic_string_view<_CharT, _Traits>> = true; 679 680template <class _CharT, class _Traits> 681inline constexpr bool ranges::enable_borrowed_range<basic_string_view<_CharT, _Traits> > = true; 682#endif // _LIBCPP_STD_VER >= 20 683 684// [string.view.deduct] 685 686#if _LIBCPP_STD_VER >= 20 687template <contiguous_iterator _It, sized_sentinel_for<_It> _End> 688basic_string_view(_It, _End) -> basic_string_view<iter_value_t<_It>>; 689#endif // _LIBCPP_STD_VER >= 20 690 691#if _LIBCPP_STD_VER >= 23 692template <ranges::contiguous_range _Range> 693basic_string_view(_Range) -> basic_string_view<ranges::range_value_t<_Range>>; 694#endif 695 696// [string.view.comparison] 697 698#if _LIBCPP_STD_VER >= 20 699 700template <class _CharT, class _Traits> 701_LIBCPP_HIDE_FROM_ABI constexpr bool operator==(basic_string_view<_CharT, _Traits> __lhs, 702 type_identity_t<basic_string_view<_CharT, _Traits>> __rhs) noexcept { 703 if (__lhs.size() != __rhs.size()) 704 return false; 705 return __lhs.compare(__rhs) == 0; 706} 707 708template <class _CharT, class _Traits> 709_LIBCPP_HIDE_FROM_ABI constexpr auto operator<=>(basic_string_view<_CharT, _Traits> __lhs, 710 type_identity_t<basic_string_view<_CharT, _Traits>> __rhs) noexcept { 711 if constexpr (requires { typename _Traits::comparison_category; }) { 712 // [string.view]/4 713 static_assert( 714 __comparison_category<typename _Traits::comparison_category>, "return type is not a comparison category type"); 715 return static_cast<typename _Traits::comparison_category>(__lhs.compare(__rhs) <=> 0); 716 } else { 717 return static_cast<weak_ordering>(__lhs.compare(__rhs) <=> 0); 718 } 719} 720 721#else 722 723// operator == 724 725template <class _CharT, class _Traits> 726_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI bool 727operator==(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT { 728 if (__lhs.size() != __rhs.size()) 729 return false; 730 return __lhs.compare(__rhs) == 0; 731} 732 733// The dummy default template parameters are used to work around a MSVC issue with mangling, see VSO-409326 for details. 734// This applies to the other sufficient overloads below for the other comparison operators. 735template <class _CharT, class _Traits, int = 1> 736_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI bool 737operator==(basic_string_view<_CharT, _Traits> __lhs, 738 __type_identity_t<basic_string_view<_CharT, _Traits> > __rhs) _NOEXCEPT { 739 if (__lhs.size() != __rhs.size()) 740 return false; 741 return __lhs.compare(__rhs) == 0; 742} 743 744template <class _CharT, class _Traits, int = 2> 745_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI bool 746operator==(__type_identity_t<basic_string_view<_CharT, _Traits> > __lhs, 747 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT { 748 if (__lhs.size() != __rhs.size()) 749 return false; 750 return __lhs.compare(__rhs) == 0; 751} 752 753// operator != 754template <class _CharT, class _Traits> 755_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI bool 756operator!=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT { 757 if (__lhs.size() != __rhs.size()) 758 return true; 759 return __lhs.compare(__rhs) != 0; 760} 761 762template <class _CharT, class _Traits, int = 1> 763_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI bool 764operator!=(basic_string_view<_CharT, _Traits> __lhs, 765 __type_identity_t<basic_string_view<_CharT, _Traits> > __rhs) _NOEXCEPT { 766 if (__lhs.size() != __rhs.size()) 767 return true; 768 return __lhs.compare(__rhs) != 0; 769} 770 771template <class _CharT, class _Traits, int = 2> 772_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI bool 773operator!=(__type_identity_t<basic_string_view<_CharT, _Traits> > __lhs, 774 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT { 775 if (__lhs.size() != __rhs.size()) 776 return true; 777 return __lhs.compare(__rhs) != 0; 778} 779 780// operator < 781template <class _CharT, class _Traits> 782_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI bool 783operator<(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT { 784 return __lhs.compare(__rhs) < 0; 785} 786 787template <class _CharT, class _Traits, int = 1> 788_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI bool 789operator<(basic_string_view<_CharT, _Traits> __lhs, 790 __type_identity_t<basic_string_view<_CharT, _Traits> > __rhs) _NOEXCEPT { 791 return __lhs.compare(__rhs) < 0; 792} 793 794template <class _CharT, class _Traits, int = 2> 795_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI bool 796operator<(__type_identity_t<basic_string_view<_CharT, _Traits> > __lhs, 797 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT { 798 return __lhs.compare(__rhs) < 0; 799} 800 801// operator > 802template <class _CharT, class _Traits> 803_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI bool 804operator>(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT { 805 return __lhs.compare(__rhs) > 0; 806} 807 808template <class _CharT, class _Traits, int = 1> 809_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI bool 810operator>(basic_string_view<_CharT, _Traits> __lhs, 811 __type_identity_t<basic_string_view<_CharT, _Traits> > __rhs) _NOEXCEPT { 812 return __lhs.compare(__rhs) > 0; 813} 814 815template <class _CharT, class _Traits, int = 2> 816_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI bool 817operator>(__type_identity_t<basic_string_view<_CharT, _Traits> > __lhs, 818 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT { 819 return __lhs.compare(__rhs) > 0; 820} 821 822// operator <= 823template <class _CharT, class _Traits> 824_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI bool 825operator<=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT { 826 return __lhs.compare(__rhs) <= 0; 827} 828 829template <class _CharT, class _Traits, int = 1> 830_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI bool 831operator<=(basic_string_view<_CharT, _Traits> __lhs, 832 __type_identity_t<basic_string_view<_CharT, _Traits> > __rhs) _NOEXCEPT { 833 return __lhs.compare(__rhs) <= 0; 834} 835 836template <class _CharT, class _Traits, int = 2> 837_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI bool 838operator<=(__type_identity_t<basic_string_view<_CharT, _Traits> > __lhs, 839 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT { 840 return __lhs.compare(__rhs) <= 0; 841} 842 843// operator >= 844template <class _CharT, class _Traits> 845_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI bool 846operator>=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT { 847 return __lhs.compare(__rhs) >= 0; 848} 849 850template <class _CharT, class _Traits, int = 1> 851_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI bool 852operator>=(basic_string_view<_CharT, _Traits> __lhs, 853 __type_identity_t<basic_string_view<_CharT, _Traits> > __rhs) _NOEXCEPT { 854 return __lhs.compare(__rhs) >= 0; 855} 856 857template <class _CharT, class _Traits, int = 2> 858_LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI bool 859operator>=(__type_identity_t<basic_string_view<_CharT, _Traits> > __lhs, 860 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT { 861 return __lhs.compare(__rhs) >= 0; 862} 863 864#endif // _LIBCPP_STD_VER >= 20 865 866template <class _CharT, class _Traits> 867_LIBCPP_HIDE_FROM_ABI basic_ostream<_CharT, _Traits>& 868operator<<(basic_ostream<_CharT, _Traits>& __os, basic_string_view<_CharT, _Traits> __str); 869 870// [string.view.hash] 871template <class _CharT> 872struct __string_view_hash : public __unary_function<basic_string_view<_CharT, char_traits<_CharT> >, size_t> { 873 _LIBCPP_HIDE_FROM_ABI size_t operator()(const basic_string_view<_CharT, char_traits<_CharT> > __val) const _NOEXCEPT { 874 return std::__do_string_hash(__val.data(), __val.data() + __val.size()); 875 } 876}; 877 878template <> 879struct hash<basic_string_view<char, char_traits<char> > > : __string_view_hash<char> {}; 880 881#ifndef _LIBCPP_HAS_NO_CHAR8_T 882template <> 883struct hash<basic_string_view<char8_t, char_traits<char8_t> > > : __string_view_hash<char8_t> {}; 884#endif 885 886template <> 887struct hash<basic_string_view<char16_t, char_traits<char16_t> > > : __string_view_hash<char16_t> {}; 888 889template <> 890struct hash<basic_string_view<char32_t, char_traits<char32_t> > > : __string_view_hash<char32_t> {}; 891 892#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 893template <> 894struct hash<basic_string_view<wchar_t, char_traits<wchar_t> > > : __string_view_hash<wchar_t> {}; 895#endif 896 897#if _LIBCPP_STD_VER >= 14 898inline namespace literals { 899inline namespace string_view_literals { 900inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR basic_string_view<char> 901operator""sv(const char* __str, size_t __len) _NOEXCEPT { 902 return basic_string_view<char>(__str, __len); 903} 904 905# ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 906inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR basic_string_view<wchar_t> 907operator""sv(const wchar_t* __str, size_t __len) _NOEXCEPT { 908 return basic_string_view<wchar_t>(__str, __len); 909} 910# endif 911 912# ifndef _LIBCPP_HAS_NO_CHAR8_T 913inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR basic_string_view<char8_t> 914operator""sv(const char8_t* __str, size_t __len) _NOEXCEPT { 915 return basic_string_view<char8_t>(__str, __len); 916} 917# endif 918 919inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR basic_string_view<char16_t> 920operator""sv(const char16_t* __str, size_t __len) _NOEXCEPT { 921 return basic_string_view<char16_t>(__str, __len); 922} 923 924inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR basic_string_view<char32_t> 925operator""sv(const char32_t* __str, size_t __len) _NOEXCEPT { 926 return basic_string_view<char32_t>(__str, __len); 927} 928} // namespace string_view_literals 929} // namespace literals 930#endif 931_LIBCPP_END_NAMESPACE_STD 932 933_LIBCPP_POP_MACROS 934 935#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 936# include <algorithm> 937# include <concepts> 938# include <cstdlib> 939# include <iterator> 940# include <type_traits> 941#endif 942 943#endif // _LIBCPP_STRING_VIEW 944