diff options
author | mikhnenko <[email protected]> | 2024-11-13 19:49:47 +0300 |
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committer | mikhnenko <[email protected]> | 2024-11-13 20:05:17 +0300 |
commit | 3a1f180ce38fcdb92d6e67966a1c7e957ff9bcc9 (patch) | |
tree | e784fb8ca03783bbc1c10d76dc899a7328063657 /contrib/libs/cxxsupp/libcxxcuda11/include/string | |
parent | 593d804b3cb5202c629726e873c66ce3eb20b1a7 (diff) |
Freeze libcxx for cuda without c++20 support
commit_hash:c2eb32b5cb16638c17c6fc6900738f26ba6eca49
Diffstat (limited to 'contrib/libs/cxxsupp/libcxxcuda11/include/string')
-rw-r--r-- | contrib/libs/cxxsupp/libcxxcuda11/include/string | 4501 |
1 files changed, 4501 insertions, 0 deletions
diff --git a/contrib/libs/cxxsupp/libcxxcuda11/include/string b/contrib/libs/cxxsupp/libcxxcuda11/include/string new file mode 100644 index 00000000000..6550f5baf6b --- /dev/null +++ b/contrib/libs/cxxsupp/libcxxcuda11/include/string @@ -0,0 +1,4501 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP_STRING +#define _LIBCPP_STRING + +/* + string synopsis + +#include <compare> +#include <initializer_list> + +namespace std +{ + +template <class stateT> +class fpos +{ +private: + stateT st; +public: + fpos(streamoff = streamoff()); + + operator streamoff() const; + + stateT state() const; + void state(stateT); + + fpos& operator+=(streamoff); + fpos operator+ (streamoff) const; + fpos& operator-=(streamoff); + fpos operator- (streamoff) const; +}; + +template <class stateT> streamoff operator-(const fpos<stateT>& x, const fpos<stateT>& y); + +template <class stateT> bool operator==(const fpos<stateT>& x, const fpos<stateT>& y); +template <class stateT> bool operator!=(const fpos<stateT>& x, const fpos<stateT>& y); + +template <class charT> +struct char_traits +{ + using char_type = charT; + using int_type = ...; + using off_type = streamoff; + using pos_type = streampos; + using state_type = mbstate_t; + using comparison_category = strong_ordering; // Since C++20 only for the specializations + // char, wchar_t, char8_t, char16_t, and char32_t. + + static void assign(char_type& c1, const char_type& c2) noexcept; + static constexpr bool eq(char_type c1, char_type c2) noexcept; + static constexpr bool lt(char_type c1, char_type c2) noexcept; + + static int compare(const char_type* s1, const char_type* s2, size_t n); + static size_t length(const char_type* s); + static const char_type* find(const char_type* s, size_t n, const char_type& a); + static char_type* move(char_type* s1, const char_type* s2, size_t n); + static char_type* copy(char_type* s1, const char_type* s2, size_t n); + static char_type* assign(char_type* s, size_t n, char_type a); + + static constexpr int_type not_eof(int_type c) noexcept; + static constexpr char_type to_char_type(int_type c) noexcept; + static constexpr int_type to_int_type(char_type c) noexcept; + static constexpr bool eq_int_type(int_type c1, int_type c2) noexcept; + static constexpr int_type eof() noexcept; +}; + +template <> struct char_traits<char>; +template <> struct char_traits<wchar_t>; +template <> struct char_traits<char8_t>; // C++20 +template <> struct char_traits<char16_t>; +template <> struct char_traits<char32_t>; + +template<class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> > +class basic_string +{ +public: +// types: + typedef traits traits_type; + typedef typename traits_type::char_type value_type; + typedef Allocator allocator_type; + typedef typename allocator_type::size_type size_type; + typedef typename allocator_type::difference_type difference_type; + typedef typename allocator_type::reference reference; + typedef typename allocator_type::const_reference const_reference; + typedef typename allocator_type::pointer pointer; + typedef typename allocator_type::const_pointer const_pointer; + typedef implementation-defined iterator; + typedef implementation-defined const_iterator; + typedef std::reverse_iterator<iterator> reverse_iterator; + typedef std::reverse_iterator<const_iterator> const_reverse_iterator; + + static const size_type npos = -1; + + basic_string() + noexcept(is_nothrow_default_constructible<allocator_type>::value); // constexpr since C++20 + explicit basic_string(const allocator_type& a); // constexpr since C++20 + basic_string(const basic_string& str); // constexpr since C++20 + basic_string(basic_string&& str) + noexcept(is_nothrow_move_constructible<allocator_type>::value); // constexpr since C++20 + basic_string(const basic_string& str, size_type pos, + const allocator_type& a = allocator_type()); // constexpr since C++20 + basic_string(const basic_string& str, size_type pos, size_type n, + const Allocator& a = Allocator()); // constexpr since C++20 + constexpr basic_string( + basic_string&& str, size_type pos, const Allocator& a = Allocator()); // since C++23 + constexpr basic_string( + basic_string&& str, size_type pos, size_type n, const Allocator& a = Allocator()); // since C++23 + template<class T> + basic_string(const T& t, size_type pos, size_type n, const Allocator& a = Allocator()); // C++17, constexpr since C++20 + template <class T> + explicit basic_string(const T& t, const Allocator& a = Allocator()); // C++17, constexpr since C++20 + basic_string(const value_type* s, const allocator_type& a = allocator_type()); // constexpr since C++20 + basic_string(const value_type* s, size_type n, const allocator_type& a = allocator_type()); // constexpr since C++20 + basic_string(nullptr_t) = delete; // C++23 + basic_string(size_type n, value_type c, const allocator_type& a = allocator_type()); // constexpr since C++20 + template<class InputIterator> + basic_string(InputIterator begin, InputIterator end, + const allocator_type& a = allocator_type()); // constexpr since C++20 + template<container-compatible-range<charT> R> + constexpr basic_string(from_range_t, R&& rg, const Allocator& a = Allocator()); // since C++23 + basic_string(initializer_list<value_type>, const Allocator& = Allocator()); // constexpr since C++20 + basic_string(const basic_string&, const Allocator&); // constexpr since C++20 + basic_string(basic_string&&, const Allocator&); // constexpr since C++20 + + ~basic_string(); // constexpr since C++20 + + operator basic_string_view<charT, traits>() const noexcept; // constexpr since C++20 + + basic_string& operator=(const basic_string& str); // constexpr since C++20 + template <class T> + basic_string& operator=(const T& t); // C++17, constexpr since C++20 + basic_string& operator=(basic_string&& str) + noexcept( + allocator_type::propagate_on_container_move_assignment::value || + allocator_type::is_always_equal::value ); // C++17, constexpr since C++20 + basic_string& operator=(const value_type* s); // constexpr since C++20 + basic_string& operator=(nullptr_t) = delete; // C++23 + basic_string& operator=(value_type c); // constexpr since C++20 + basic_string& operator=(initializer_list<value_type>); // constexpr since C++20 + + iterator begin() noexcept; // constexpr since C++20 + const_iterator begin() const noexcept; // constexpr since C++20 + iterator end() noexcept; // constexpr since C++20 + const_iterator end() const noexcept; // constexpr since C++20 + + reverse_iterator rbegin() noexcept; // constexpr since C++20 + const_reverse_iterator rbegin() const noexcept; // constexpr since C++20 + reverse_iterator rend() noexcept; // constexpr since C++20 + const_reverse_iterator rend() const noexcept; // constexpr since C++20 + + const_iterator cbegin() const noexcept; // constexpr since C++20 + const_iterator cend() const noexcept; // constexpr since C++20 + const_reverse_iterator crbegin() const noexcept; // constexpr since C++20 + const_reverse_iterator crend() const noexcept; // constexpr since C++20 + + size_type size() const noexcept; // constexpr since C++20 + size_type length() const noexcept; // constexpr since C++20 + size_type max_size() const noexcept; // constexpr since C++20 + size_type capacity() const noexcept; // constexpr since C++20 + + void resize(size_type n, value_type c); // constexpr since C++20 + void resize(size_type n); // constexpr since C++20 + + template<class Operation> + constexpr void resize_and_overwrite(size_type n, Operation op); // since C++23 + + void reserve(size_type res_arg); // constexpr since C++20 + void reserve(); // deprecated in C++20 + void shrink_to_fit(); // constexpr since C++20 + void clear() noexcept; // constexpr since C++20 + bool empty() const noexcept; // constexpr since C++20 + + const_reference operator[](size_type pos) const; // constexpr since C++20 + reference operator[](size_type pos); // constexpr since C++20 + + const_reference at(size_type n) const; // constexpr since C++20 + reference at(size_type n); // constexpr since C++20 + + basic_string& operator+=(const basic_string& str); // constexpr since C++20 + template <class T> + basic_string& operator+=(const T& t); // C++17, constexpr since C++20 + basic_string& operator+=(const value_type* s); // constexpr since C++20 + basic_string& operator+=(value_type c); // constexpr since C++20 + basic_string& operator+=(initializer_list<value_type>); // constexpr since C++20 + + basic_string& append(const basic_string& str); // constexpr since C++20 + template <class T> + basic_string& append(const T& t); // C++17, constexpr since C++20 + basic_string& append(const basic_string& str, size_type pos, size_type n=npos); // C++14, constexpr since C++20 + template <class T> + basic_string& append(const T& t, size_type pos, size_type n=npos); // C++17, constexpr since C++20 + basic_string& append(const value_type* s, size_type n); // constexpr since C++20 + basic_string& append(const value_type* s); // constexpr since C++20 + basic_string& append(size_type n, value_type c); // constexpr since C++20 + template<class InputIterator> + basic_string& append(InputIterator first, InputIterator last); // constexpr since C++20 + template<container-compatible-range<charT> R> + constexpr basic_string& append_range(R&& rg); // C++23 + basic_string& append(initializer_list<value_type>); // constexpr since C++20 + + void push_back(value_type c); // constexpr since C++20 + void pop_back(); // constexpr since C++20 + reference front(); // constexpr since C++20 + const_reference front() const; // constexpr since C++20 + reference back(); // constexpr since C++20 + const_reference back() const; // constexpr since C++20 + + basic_string& assign(const basic_string& str); // constexpr since C++20 + template <class T> + basic_string& assign(const T& t); // C++17, constexpr since C++20 + basic_string& assign(basic_string&& str); // constexpr since C++20 + basic_string& assign(const basic_string& str, size_type pos, size_type n=npos); // C++14, constexpr since C++20 + template <class T> + basic_string& assign(const T& t, size_type pos, size_type n=npos); // C++17, constexpr since C++20 + basic_string& assign(const value_type* s, size_type n); // constexpr since C++20 + basic_string& assign(const value_type* s); // constexpr since C++20 + basic_string& assign(size_type n, value_type c); // constexpr since C++20 + template<class InputIterator> + basic_string& assign(InputIterator first, InputIterator last); // constexpr since C++20 + template<container-compatible-range<charT> R> + constexpr basic_string& assign_range(R&& rg); // C++23 + basic_string& assign(initializer_list<value_type>); // constexpr since C++20 + + basic_string& insert(size_type pos1, const basic_string& str); // constexpr since C++20 + template <class T> + basic_string& insert(size_type pos1, const T& t); // constexpr since C++20 + basic_string& insert(size_type pos1, const basic_string& str, + size_type pos2, size_type n); // constexpr since C++20 + template <class T> + basic_string& insert(size_type pos1, const T& t, size_type pos2, size_type n); // C++17, constexpr since C++20 + basic_string& insert(size_type pos, const value_type* s, size_type n=npos); // C++14, constexpr since C++20 + basic_string& insert(size_type pos, const value_type* s); // constexpr since C++20 + basic_string& insert(size_type pos, size_type n, value_type c); // constexpr since C++20 + iterator insert(const_iterator p, value_type c); // constexpr since C++20 + iterator insert(const_iterator p, size_type n, value_type c); // constexpr since C++20 + template<class InputIterator> + iterator insert(const_iterator p, InputIterator first, InputIterator last); // constexpr since C++20 + template<container-compatible-range<charT> R> + constexpr iterator insert_range(const_iterator p, R&& rg); // C++23 + iterator insert(const_iterator p, initializer_list<value_type>); // constexpr since C++20 + + basic_string& erase(size_type pos = 0, size_type n = npos); // constexpr since C++20 + iterator erase(const_iterator position); // constexpr since C++20 + iterator erase(const_iterator first, const_iterator last); // constexpr since C++20 + + basic_string& replace(size_type pos1, size_type n1, const basic_string& str); // constexpr since C++20 + template <class T> + basic_string& replace(size_type pos1, size_type n1, const T& t); // C++17, constexpr since C++20 + basic_string& replace(size_type pos1, size_type n1, const basic_string& str, + size_type pos2, size_type n2=npos); // C++14, constexpr since C++20 + template <class T> + basic_string& replace(size_type pos1, size_type n1, const T& t, + size_type pos2, size_type n); // C++17, constexpr since C++20 + basic_string& replace(size_type pos, size_type n1, const value_type* s, size_type n2); // constexpr since C++20 + basic_string& replace(size_type pos, size_type n1, const value_type* s); // constexpr since C++20 + basic_string& replace(size_type pos, size_type n1, size_type n2, value_type c); // constexpr since C++20 + basic_string& replace(const_iterator i1, const_iterator i2, const basic_string& str); // constexpr since C++20 + template <class T> + basic_string& replace(const_iterator i1, const_iterator i2, const T& t); // C++17, constexpr since C++20 + basic_string& replace(const_iterator i1, const_iterator i2, const value_type* s, size_type n); // constexpr since C++20 + basic_string& replace(const_iterator i1, const_iterator i2, const value_type* s); // constexpr since C++20 + basic_string& replace(const_iterator i1, const_iterator i2, size_type n, value_type c); // constexpr since C++20 + template<class InputIterator> + basic_string& replace(const_iterator i1, const_iterator i2, InputIterator j1, InputIterator j2); // constexpr since C++20 + template<container-compatible-range<charT> R> + constexpr basic_string& replace_with_range(const_iterator i1, const_iterator i2, R&& rg); // C++23 + basic_string& replace(const_iterator i1, const_iterator i2, initializer_list<value_type>); // constexpr since C++20 + + size_type copy(value_type* s, size_type n, size_type pos = 0) const; // constexpr since C++20 + basic_string substr(size_type pos = 0, size_type n = npos) const; // constexpr in C++20, removed in C++23 + basic_string substr(size_type pos = 0, size_type n = npos) const&; // since C++23 + constexpr basic_string substr(size_type pos = 0, size_type n = npos) &&; // since C++23 + void swap(basic_string& str) + noexcept(allocator_traits<allocator_type>::propagate_on_container_swap::value || + allocator_traits<allocator_type>::is_always_equal::value); // C++17, constexpr since C++20 + + const value_type* c_str() const noexcept; // constexpr since C++20 + const value_type* data() const noexcept; // constexpr since C++20 + value_type* data() noexcept; // C++17, constexpr since C++20 + + allocator_type get_allocator() const noexcept; // constexpr since C++20 + + size_type find(const basic_string& str, size_type pos = 0) const noexcept; // constexpr since C++20 + template <class T> + size_type find(const T& t, size_type pos = 0) const noexcept; // C++17, noexcept as an extension, constexpr since C++20 + size_type find(const value_type* s, size_type pos, size_type n) const noexcept; // constexpr since C++20 + size_type find(const value_type* s, size_type pos = 0) const noexcept; // constexpr since C++20 + size_type find(value_type c, size_type pos = 0) const noexcept; // constexpr since C++20 + + size_type rfind(const basic_string& str, size_type pos = npos) const noexcept; // constexpr since C++20 + template <class T> + size_type rfind(const T& t, size_type pos = npos) const noexcept; // C++17, noexcept as an extension, constexpr since C++20 + size_type rfind(const value_type* s, size_type pos, size_type n) const noexcept; // constexpr since C++20 + size_type rfind(const value_type* s, size_type pos = npos) const noexcept; // constexpr since C++20 + size_type rfind(value_type c, size_type pos = npos) const noexcept; // constexpr since C++20 + + size_type find_first_of(const basic_string& str, size_type pos = 0) const noexcept; // constexpr since C++20 + template <class T> + size_type find_first_of(const T& t, size_type pos = 0) const noexcept; // C++17, noexcept as an extension, constexpr since C++20 + size_type find_first_of(const value_type* s, size_type pos, size_type n) const noexcept; // constexpr since C++20 + size_type find_first_of(const value_type* s, size_type pos = 0) const noexcept; // constexpr since C++20 + size_type find_first_of(value_type c, size_type pos = 0) const noexcept; // constexpr since C++20 + + size_type find_last_of(const basic_string& str, size_type pos = npos) const noexcept; // constexpr since C++20 + template <class T> + size_type find_last_of(const T& t, size_type pos = npos) const noexcept noexcept; // C++17, noexcept as an extension, constexpr since C++20 + size_type find_last_of(const value_type* s, size_type pos, size_type n) const noexcept; // constexpr since C++20 + size_type find_last_of(const value_type* s, size_type pos = npos) const noexcept; // constexpr since C++20 + size_type find_last_of(value_type c, size_type pos = npos) const noexcept; // constexpr since C++20 + + size_type find_first_not_of(const basic_string& str, size_type pos = 0) const noexcept; // constexpr since C++20 + template <class T> + size_type find_first_not_of(const T& t, size_type pos = 0) const noexcept; // C++17, noexcept as an extension, constexpr since C++20 + size_type find_first_not_of(const value_type* s, size_type pos, size_type n) const noexcept; // constexpr since C++20 + size_type find_first_not_of(const value_type* s, size_type pos = 0) const noexcept; // constexpr since C++20 + size_type find_first_not_of(value_type c, size_type pos = 0) const noexcept; // constexpr since C++20 + + size_type find_last_not_of(const basic_string& str, size_type pos = npos) const noexcept; // constexpr since C++20 + template <class T> + size_type find_last_not_of(const T& t, size_type pos = npos) const noexcept; // C++17, noexcept as an extension, constexpr since C++20 + size_type find_last_not_of(const value_type* s, size_type pos, size_type n) const noexcept; // constexpr since C++20 + size_type find_last_not_of(const value_type* s, size_type pos = npos) const noexcept; // constexpr since C++20 + size_type find_last_not_of(value_type c, size_type pos = npos) const noexcept; // constexpr since C++20 + + int compare(const basic_string& str) const noexcept; // constexpr since C++20 + template <class T> + int compare(const T& t) const noexcept; // C++17, noexcept as an extension, constexpr since C++20 + int compare(size_type pos1, size_type n1, const basic_string& str) const; // constexpr since C++20 + template <class T> + int compare(size_type pos1, size_type n1, const T& t) const; // C++17, constexpr since C++20 + int compare(size_type pos1, size_type n1, const basic_string& str, + size_type pos2, size_type n2=npos) const; // C++14, constexpr since C++20 + template <class T> + int compare(size_type pos1, size_type n1, const T& t, + size_type pos2, size_type n2=npos) const; // C++17, constexpr since C++20 + int compare(const value_type* s) const noexcept; // constexpr since C++20 + int compare(size_type pos1, size_type n1, const value_type* s) const; // constexpr since C++20 + int compare(size_type pos1, size_type n1, const value_type* s, size_type n2) const; // constexpr since C++20 + + constexpr bool starts_with(basic_string_view<charT, traits> sv) const noexcept; // C++20 + constexpr bool starts_with(charT c) const noexcept; // C++20 + constexpr bool starts_with(const charT* s) const; // C++20 + constexpr bool ends_with(basic_string_view<charT, traits> sv) const noexcept; // C++20 + constexpr bool ends_with(charT c) const noexcept; // C++20 + constexpr bool ends_with(const charT* s) const; // C++20 + + constexpr bool contains(basic_string_view<charT, traits> sv) const noexcept; // C++23 + constexpr bool contains(charT c) const noexcept; // C++23 + constexpr bool contains(const charT* s) const; // C++23 +}; + +template<class InputIterator, + class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>> +basic_string(InputIterator, InputIterator, Allocator = Allocator()) + -> basic_string<typename iterator_traits<InputIterator>::value_type, + char_traits<typename iterator_traits<InputIterator>::value_type>, + Allocator>; // C++17 + +template<ranges::input_range R, + class Allocator = allocator<ranges::range_value_t<R>>> + basic_string(from_range_t, R&&, Allocator = Allocator()) + -> basic_string<ranges::range_value_t<R>, char_traits<ranges::range_value_t<R>>, + Allocator>; // C++23 + +template<class charT, + class traits, + class Allocator = allocator<charT>> + explicit basic_string(basic_string_view<charT, traits>, const Allocator& = Allocator()) + -> basic_string<charT, traits, Allocator>; // C++17 + +template<class charT, + class traits, + class Allocator = allocator<charT>> + basic_string(basic_string_view<charT, traits>, + typename see below::size_type, typename see below::size_type, + const Allocator& = Allocator()) + -> basic_string<charT, traits, Allocator>; // C++17 + +template<class charT, class traits, class Allocator> +basic_string<charT, traits, Allocator> +operator+(const basic_string<charT, traits, Allocator>& lhs, + const basic_string<charT, traits, Allocator>& rhs); // constexpr since C++20 + +template<class charT, class traits, class Allocator> +basic_string<charT, traits, Allocator> +operator+(const charT* lhs , const basic_string<charT,traits,Allocator>&rhs); // constexpr since C++20 + +template<class charT, class traits, class Allocator> +basic_string<charT, traits, Allocator> +operator+(charT lhs, const basic_string<charT,traits,Allocator>& rhs); // constexpr since C++20 + +template<class charT, class traits, class Allocator> +basic_string<charT, traits, Allocator> +operator+(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs); // constexpr since C++20 + +template<class charT, class traits, class Allocator> +basic_string<charT, traits, Allocator> +operator+(const basic_string<charT, traits, Allocator>& lhs, charT rhs); // constexpr since C++20 + +template<class charT, class traits, class Allocator> +bool operator==(const basic_string<charT, traits, Allocator>& lhs, + const basic_string<charT, traits, Allocator>& rhs) noexcept; // constexpr since C++20 + +template<class charT, class traits, class Allocator> +bool operator==(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 + +template<class charT, class traits, class Allocator> +bool operator==(const basic_string<charT,traits,Allocator>& lhs, const charT* rhs) noexcept; // constexpr since C++20 + +template<class charT, class traits, class Allocator> +bool operator!=(const basic_string<charT,traits,Allocator>& lhs, + const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 + +template<class charT, class traits, class Allocator> +bool operator!=(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 + +template<class charT, class traits, class Allocator> +bool operator!=(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; // removed in C++20 + +template<class charT, class traits, class Allocator> +bool operator< (const basic_string<charT, traits, Allocator>& lhs, + const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 + +template<class charT, class traits, class Allocator> +bool operator< (const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; // removed in C++20 + +template<class charT, class traits, class Allocator> +bool operator< (const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 + +template<class charT, class traits, class Allocator> +bool operator> (const basic_string<charT, traits, Allocator>& lhs, + const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 + +template<class charT, class traits, class Allocator> +bool operator> (const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; // removed in C++20 + +template<class charT, class traits, class Allocator> +bool operator> (const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 + +template<class charT, class traits, class Allocator> +bool operator<=(const basic_string<charT, traits, Allocator>& lhs, + const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 + +template<class charT, class traits, class Allocator> +bool operator<=(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; // removed in C++20 + +template<class charT, class traits, class Allocator> +bool operator<=(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 + +template<class charT, class traits, class Allocator> +bool operator>=(const basic_string<charT, traits, Allocator>& lhs, + const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 + +template<class charT, class traits, class Allocator> +bool operator>=(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; // removed in C++20 + +template<class charT, class traits, class Allocator> +bool operator>=(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 + +template<class charT, class traits, class Allocator> // since C++20 +constexpr see below operator<=>(const basic_string<charT, traits, Allocator>& lhs, + const basic_string<charT, traits, Allocator>& rhs) noexcept; + +template<class charT, class traits, class Allocator> // since C++20 +constexpr see below operator<=>(const basic_string<charT, traits, Allocator>& lhs, + const charT* rhs) noexcept; + +template<class charT, class traits, class Allocator> +void swap(basic_string<charT, traits, Allocator>& lhs, + basic_string<charT, traits, Allocator>& rhs) + noexcept(noexcept(lhs.swap(rhs))); // constexpr since C++20 + +template<class charT, class traits, class Allocator> +basic_istream<charT, traits>& +operator>>(basic_istream<charT, traits>& is, basic_string<charT, traits, Allocator>& str); + +template<class charT, class traits, class Allocator> +basic_ostream<charT, traits>& +operator<<(basic_ostream<charT, traits>& os, const basic_string<charT, traits, Allocator>& str); + +template<class charT, class traits, class Allocator> +basic_istream<charT, traits>& +getline(basic_istream<charT, traits>& is, basic_string<charT, traits, Allocator>& str, + charT delim); + +template<class charT, class traits, class Allocator> +basic_istream<charT, traits>& +getline(basic_istream<charT, traits>& is, basic_string<charT, traits, Allocator>& str); + +template<class charT, class traits, class Allocator, class U> +typename basic_string<charT, traits, Allocator>::size_type +erase(basic_string<charT, traits, Allocator>& c, const U& value); // C++20 +template<class charT, class traits, class Allocator, class Predicate> +typename basic_string<charT, traits, Allocator>::size_type +erase_if(basic_string<charT, traits, Allocator>& c, Predicate pred); // C++20 + +typedef basic_string<char> string; +typedef basic_string<wchar_t> wstring; +typedef basic_string<char8_t> u8string; // C++20 +typedef basic_string<char16_t> u16string; +typedef basic_string<char32_t> u32string; + +int stoi (const string& str, size_t* idx = nullptr, int base = 10); +long stol (const string& str, size_t* idx = nullptr, int base = 10); +unsigned long stoul (const string& str, size_t* idx = nullptr, int base = 10); +long long stoll (const string& str, size_t* idx = nullptr, int base = 10); +unsigned long long stoull(const string& str, size_t* idx = nullptr, int base = 10); + +float stof (const string& str, size_t* idx = nullptr); +double stod (const string& str, size_t* idx = nullptr); +long double stold(const string& str, size_t* idx = nullptr); + +string to_string(int val); +string to_string(unsigned val); +string to_string(long val); +string to_string(unsigned long val); +string to_string(long long val); +string to_string(unsigned long long val); +string to_string(float val); +string to_string(double val); +string to_string(long double val); + +int stoi (const wstring& str, size_t* idx = nullptr, int base = 10); +long stol (const wstring& str, size_t* idx = nullptr, int base = 10); +unsigned long stoul (const wstring& str, size_t* idx = nullptr, int base = 10); +long long stoll (const wstring& str, size_t* idx = nullptr, int base = 10); +unsigned long long stoull(const wstring& str, size_t* idx = nullptr, int base = 10); + +float stof (const wstring& str, size_t* idx = nullptr); +double stod (const wstring& str, size_t* idx = nullptr); +long double stold(const wstring& str, size_t* idx = nullptr); + +wstring to_wstring(int val); +wstring to_wstring(unsigned val); +wstring to_wstring(long val); +wstring to_wstring(unsigned long val); +wstring to_wstring(long long val); +wstring to_wstring(unsigned long long val); +wstring to_wstring(float val); +wstring to_wstring(double val); +wstring to_wstring(long double val); + +template <> struct hash<string>; +template <> struct hash<u8string>; // C++20 +template <> struct hash<u16string>; +template <> struct hash<u32string>; +template <> struct hash<wstring>; + +basic_string<char> operator""s( const char *str, size_t len ); // C++14, constexpr since C++20 +basic_string<wchar_t> operator""s( const wchar_t *str, size_t len ); // C++14, constexpr since C++20 +constexpr basic_string<char8_t> operator""s( const char8_t *str, size_t len ); // C++20 +basic_string<char16_t> operator""s( const char16_t *str, size_t len ); // C++14, constexpr since C++20 +basic_string<char32_t> operator""s( const char32_t *str, size_t len ); // C++14, constexpr since C++20 + +} // std + +*/ + +#include <__algorithm/max.h> +#include <__algorithm/min.h> +#include <__algorithm/remove.h> +#include <__algorithm/remove_if.h> +#include <__assert> // all public C++ headers provide the assertion handler +#include <__config> +#include <__format/enable_insertable.h> +#include <__functional/hash.h> +#include <__functional/unary_function.h> +#include <__fwd/string.h> +#include <__ios/fpos.h> +#include <__iterator/distance.h> +#include <__iterator/iterator_traits.h> +#include <__iterator/reverse_iterator.h> +#include <__iterator/wrap_iter.h> +#include <__memory/addressof.h> +#include <__memory/allocate_at_least.h> +#include <__memory/allocator.h> +#include <__memory/allocator_traits.h> +#include <__memory/compressed_pair.h> +#include <__memory/construct_at.h> +#include <__memory/pointer_traits.h> +#include <__memory/swap_allocator.h> +#include <__memory_resource/polymorphic_allocator.h> +#include <__ranges/access.h> +#include <__ranges/concepts.h> +#include <__ranges/container_compatible_range.h> +#include <__ranges/from_range.h> +#include <__ranges/size.h> +#include <__string/char_traits.h> +#include <__string/extern_template_lists.h> +#include <__type_traits/is_allocator.h> +#include <__type_traits/is_array.h> +#include <__type_traits/is_convertible.h> +#include <__type_traits/is_nothrow_default_constructible.h> +#include <__type_traits/is_nothrow_move_assignable.h> +#include <__type_traits/is_same.h> +#include <__type_traits/is_standard_layout.h> +#include <__type_traits/is_trivial.h> +#include <__type_traits/noexcept_move_assign_container.h> +#include <__type_traits/remove_cvref.h> +#include <__type_traits/void_t.h> +#include <__utility/auto_cast.h> +#include <__utility/declval.h> +#include <__utility/forward.h> +#include <__utility/is_pointer_in_range.h> +#include <__utility/move.h> +#include <__utility/swap.h> +#include <__utility/unreachable.h> +#include <climits> +#include <cstdint> +#include <cstdio> // EOF +#include <cstring> +#include <limits> +#include <stdexcept> +#include <string_view> +#include <version> + +#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS +# include <cwchar> +#endif + +// standard-mandated includes + +// [iterator.range] +#include <__iterator/access.h> +#include <__iterator/data.h> +#include <__iterator/empty.h> +#include <__iterator/reverse_access.h> +#include <__iterator/size.h> + +// [string.syn] +#include <compare> +#include <initializer_list> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +# pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + + +_LIBCPP_BEGIN_NAMESPACE_STD + +// basic_string + +template<class _CharT, class _Traits, class _Allocator> +basic_string<_CharT, _Traits, _Allocator> +_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 +operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, + const basic_string<_CharT, _Traits, _Allocator>& __y); + +template<class _CharT, class _Traits, class _Allocator> +_LIBCPP_HIDDEN _LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator> +operator+(const _CharT* __x, const basic_string<_CharT,_Traits,_Allocator>& __y); + +template<class _CharT, class _Traits, class _Allocator> +_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator> +operator+(_CharT __x, const basic_string<_CharT,_Traits,_Allocator>& __y); + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator> +operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, const _CharT* __y); + +template<class _CharT, class _Traits, class _Allocator> +_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator> +operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, _CharT __y); + +extern template _LIBCPP_EXPORTED_FROM_ABI string operator+ + <char, char_traits<char>, allocator<char> >(char const*, string const&); + +template <class _Iter> +struct __string_is_trivial_iterator : public false_type {}; + +template <class _Tp> +struct __string_is_trivial_iterator<_Tp*> + : public is_arithmetic<_Tp> {}; + +template <class _Iter> +struct __string_is_trivial_iterator<__wrap_iter<_Iter> > + : public __string_is_trivial_iterator<_Iter> {}; + +template <class _CharT, class _Traits, class _Tp> +struct __can_be_converted_to_string_view : public _BoolConstant< + is_convertible<const _Tp&, basic_string_view<_CharT, _Traits> >::value && + !is_convertible<const _Tp&, const _CharT*>::value + > {}; + +struct __uninitialized_size_tag {}; +struct __init_with_sentinel_tag {}; + +template<class _CharT, class _Traits, class _Allocator> +class basic_string +{ + static_assert(sizeof(_CharT) <= 4, "libc++ implementation of std::basic_string does not support extra-wide character types"); +public: + typedef basic_string __self; + typedef basic_string_view<_CharT, _Traits> __self_view; + typedef _Traits traits_type; + typedef _CharT value_type; + typedef _Allocator allocator_type; + typedef allocator_traits<allocator_type> __alloc_traits; + typedef typename __alloc_traits::size_type size_type; + typedef typename __alloc_traits::difference_type difference_type; + typedef value_type& reference; + typedef const value_type& const_reference; + typedef typename __alloc_traits::pointer pointer; + typedef typename __alloc_traits::const_pointer const_pointer; + + static_assert((!is_array<value_type>::value), "Character type of basic_string must not be an array"); + static_assert(( is_standard_layout<value_type>::value), "Character type of basic_string must be standard-layout"); + static_assert(( is_trivial<value_type>::value), "Character type of basic_string must be trivial"); + static_assert(( is_same<_CharT, typename traits_type::char_type>::value), + "traits_type::char_type must be the same type as CharT"); + static_assert(( is_same<typename allocator_type::value_type, value_type>::value), + "Allocator::value_type must be same type as value_type"); + + static_assert(is_same<allocator_type, __rebind_alloc<__alloc_traits, value_type> >::value, + "[allocator.requirements] states that rebinding an allocator to the same type should result in the " + "original allocator"); + +#if _YNDX_LIBCPP_MAKE_STRING_ITERATOR_POINTERS == 1 + typedef pointer iterator; + typedef const_pointer const_iterator; +#else + // TODO: Implement iterator bounds checking without requiring the global database. + typedef __wrap_iter<pointer> iterator; + typedef __wrap_iter<const_pointer> const_iterator; +#endif + typedef std::reverse_iterator<iterator> reverse_iterator; + typedef std::reverse_iterator<const_iterator> const_reverse_iterator; + +private: + static_assert(CHAR_BIT == 8, "This implementation assumes that one byte contains 8 bits"); + +#ifdef _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT + + struct __long + { + pointer __data_; + size_type __size_; + size_type __cap_ : sizeof(size_type) * CHAR_BIT - 1; + size_type __is_long_ : 1; + }; + + enum {__min_cap = (sizeof(__long) - 1)/sizeof(value_type) > 2 ? + (sizeof(__long) - 1)/sizeof(value_type) : 2}; + + struct __short + { + value_type __data_[__min_cap]; + unsigned char __padding_[sizeof(value_type) - 1]; + unsigned char __size_ : 7; + unsigned char __is_long_ : 1; + }; + +// The __endian_factor is required because the field we use to store the size +// has one fewer bit than it would if it were not a bitfield. +// +// If the LSB is used to store the short-flag in the short string representation, +// we have to multiply the size by two when it is stored and divide it by two when +// it is loaded to make sure that we always store an even number. In the long string +// representation, we can ignore this because we can assume that we always allocate +// an even amount of value_types. +// +// If the MSB is used for the short-flag, the max_size() is numeric_limits<size_type>::max() / 2. +// This does not impact the short string representation, since we never need the MSB +// for representing the size of a short string anyway. + +#ifdef _LIBCPP_BIG_ENDIAN + static const size_type __endian_factor = 2; +#else + static const size_type __endian_factor = 1; +#endif + +#else // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT + +#ifdef _LIBCPP_BIG_ENDIAN + static const size_type __endian_factor = 1; +#else + static const size_type __endian_factor = 2; +#endif + + // Attribute 'packed' is used to keep the layout compatible with the + // previous definition that did not use bit fields. This is because on + // some platforms bit fields have a default size rather than the actual + // size used, e.g., it is 4 bytes on AIX. See D128285 for details. + struct __long + { + struct _LIBCPP_PACKED { + size_type __is_long_ : 1; + size_type __cap_ : sizeof(size_type) * CHAR_BIT - 1; + }; + size_type __size_; + pointer __data_; + }; + + enum {__min_cap = (sizeof(__long) - 1)/sizeof(value_type) > 2 ? + (sizeof(__long) - 1)/sizeof(value_type) : 2}; + + struct __short + { + struct _LIBCPP_PACKED { + unsigned char __is_long_ : 1; + unsigned char __size_ : 7; + }; + char __padding_[sizeof(value_type) - 1]; + value_type __data_[__min_cap]; + }; + +#endif // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT + + static_assert(sizeof(__short) == (sizeof(value_type) * (__min_cap + 1)), "__short has an unexpected size."); + + union __ulx{__long __lx; __short __lxx;}; + + enum {__n_words = sizeof(__ulx) / sizeof(size_type)}; + + struct __raw + { + size_type __words[__n_words]; + }; + + struct __rep + { + union + { + __long __l; + __short __s; + __raw __r; + }; + }; + + __compressed_pair<__rep, allocator_type> __r_; + + // Construct a string with the given allocator and enough storage to hold `__size` characters, but + // don't initialize the characters. The contents of the string, including the null terminator, must be + // initialized separately. + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + explicit basic_string(__uninitialized_size_tag, size_type __size, const allocator_type& __a) + : __r_(__default_init_tag(), __a) { + if (__size > max_size()) + __throw_length_error(); + if (__fits_in_sso(__size)) { + __r_.first() = __rep(); + __set_short_size(__size); + } else { + auto __capacity = __recommend(__size) + 1; + auto __allocation = __alloc_traits::allocate(__alloc(), __capacity); + __begin_lifetime(__allocation, __capacity); + __set_long_cap(__capacity); + __set_long_pointer(__allocation); + __set_long_size(__size); + } + } + + template <class _Iter, class _Sent> + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string(__init_with_sentinel_tag, _Iter __first, _Sent __last, const allocator_type& __a) + : __r_(__default_init_tag(), __a) { + __init_with_sentinel(std::move(__first), std::move(__last)); + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator __make_iterator(pointer __p) { + return iterator(__p); + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_iterator __make_const_iterator(const_pointer __p) const { + return const_iterator(__p); + } + +public: + _LIBCPP_TEMPLATE_DATA_VIS static const size_type npos = -1; + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string() + _NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value) + : __r_(__default_init_tag(), __default_init_tag()) { + __default_init(); + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit basic_string(const allocator_type& __a) +#if _LIBCPP_STD_VER <= 14 + _NOEXCEPT_(is_nothrow_copy_constructible<allocator_type>::value) +#else + _NOEXCEPT +#endif + : __r_(__default_init_tag(), __a) { + __default_init(); + } + + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(const basic_string& __str) + : __r_(__default_init_tag(), __alloc_traits::select_on_container_copy_construction(__str.__alloc())) { + if (!__str.__is_long()) + __r_.first() = __str.__r_.first(); + else + __init_copy_ctor_external(std::__to_address(__str.__get_long_pointer()), __str.__get_long_size()); + } + + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(const basic_string& __str, const allocator_type& __a) + : __r_(__default_init_tag(), __a) { + if (!__str.__is_long()) + __r_.first() = __str.__r_.first(); + else + __init_copy_ctor_external(std::__to_address(__str.__get_long_pointer()), __str.__get_long_size()); + } + +#ifndef _LIBCPP_CXX03_LANG + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(basic_string&& __str) +# if _LIBCPP_STD_VER <= 14 + _NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value) +# else + _NOEXCEPT +# endif + : __r_(std::move(__str.__r_)) { + __str.__default_init(); + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(basic_string&& __str, const allocator_type& __a) + : __r_(__default_init_tag(), __a) { + if (__str.__is_long() && __a != __str.__alloc()) // copy, not move + __init(std::__to_address(__str.__get_long_pointer()), __str.__get_long_size()); + else { + if (__libcpp_is_constant_evaluated()) + __r_.first() = __rep(); + __r_.first() = __str.__r_.first(); + __str.__default_init(); + } + } +#endif // _LIBCPP_CXX03_LANG + + template <__enable_if_t<__is_allocator<_Allocator>::value, int> = 0> + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(const _CharT* __s) + : __r_(__default_init_tag(), __default_init_tag()) { + _LIBCPP_ASSERT_UNCATEGORIZED(__s != nullptr, "basic_string(const char*) detected nullptr"); + __init(__s, traits_type::length(__s)); + } + + template <__enable_if_t<__is_allocator<_Allocator>::value, int> = 0> + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(const _CharT* __s, const _Allocator& __a) + : __r_(__default_init_tag(), __a) { + _LIBCPP_ASSERT_UNCATEGORIZED(__s != nullptr, "basic_string(const char*, allocator) detected nullptr"); + __init(__s, traits_type::length(__s)); + } + +#if _LIBCPP_STD_VER >= 20 + basic_string(nullptr_t) = delete; +#endif + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string(nullptr_t, size_t) = delete; + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(const _CharT* __s, size_type __n) + : __r_(__default_init_tag(), __default_init_tag()) { + _LIBCPP_ASSERT_UNCATEGORIZED(__n == 0 || __s != nullptr, "basic_string(const char*, n) detected nullptr"); + __init(__s, __n); + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string(nullptr_t, size_t, const _Allocator&) = delete; + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string(const _CharT* __s, size_type __n, const _Allocator& __a) + : __r_(__default_init_tag(), __a) { + _LIBCPP_ASSERT_UNCATEGORIZED(__n == 0 || __s != nullptr, + "basic_string(const char*, n, allocator) detected nullptr"); + __init(__s, __n); + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(size_type __n, _CharT __c) + : __r_(__default_init_tag(), __default_init_tag()) { + __init(__n, __c); + } + +#if _LIBCPP_STD_VER >= 23 + _LIBCPP_HIDE_FROM_ABI constexpr + basic_string(basic_string&& __str, size_type __pos, const _Allocator& __alloc = _Allocator()) + : basic_string(std::move(__str), __pos, npos, __alloc) {} + + _LIBCPP_HIDE_FROM_ABI constexpr + basic_string(basic_string&& __str, size_type __pos, size_type __n, const _Allocator& __alloc = _Allocator()) + : __r_(__default_init_tag(), __alloc) { + if (__pos > __str.size()) + __throw_out_of_range(); + + auto __len = std::min<size_type>(__n, __str.size() - __pos); + if (__alloc_traits::is_always_equal::value || __alloc == __str.__alloc()) { + __r_.first() = __str.__r_.first(); + __str.__default_init(); + + _Traits::move(data(), data() + __pos, __len); + __set_size(__len); + _Traits::assign(data()[__len], value_type()); + } else { + // Perform a copy because the allocators are not compatible. + __init(__str.data() + __pos, __len); + } + } +#endif + + template <__enable_if_t<__is_allocator<_Allocator>::value, int> = 0> + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(size_type __n, _CharT __c, const _Allocator& __a) + : __r_(__default_init_tag(), __a) { + __init(__n, __c); + } + + _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string(const basic_string& __str, size_type __pos, size_type __n, const _Allocator& __a = _Allocator()) + : __r_(__default_init_tag(), __a) { + size_type __str_sz = __str.size(); + if (__pos > __str_sz) + __throw_out_of_range(); + __init(__str.data() + __pos, std::min(__n, __str_sz - __pos)); + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string(const basic_string& __str, size_type __pos, const _Allocator& __a = _Allocator()) + : __r_(__default_init_tag(), __a) { + size_type __str_sz = __str.size(); + if (__pos > __str_sz) + __throw_out_of_range(); + __init(__str.data() + __pos, __str_sz - __pos); + } + + template <class _Tp, + __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && + !__is_same_uncvref<_Tp, basic_string>::value, + int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string(const _Tp& __t, size_type __pos, size_type __n, const allocator_type& __a = allocator_type()) + : __r_(__default_init_tag(), __a) { + __self_view __sv0 = __t; + __self_view __sv = __sv0.substr(__pos, __n); + __init(__sv.data(), __sv.size()); + } + + template <class _Tp, + __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && + !__is_same_uncvref<_Tp, basic_string>::value, + int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit basic_string(const _Tp& __t) + : __r_(__default_init_tag(), __default_init_tag()) { + __self_view __sv = __t; + __init(__sv.data(), __sv.size()); + } + + template <class _Tp, + __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && + !__is_same_uncvref<_Tp, basic_string>::value, + int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit basic_string( + const _Tp& __t, const allocator_type& __a) + : __r_(__default_init_tag(), __a) { + __self_view __sv = __t; + __init(__sv.data(), __sv.size()); + } + + template <class _InputIterator, __enable_if_t<__has_input_iterator_category<_InputIterator>::value, int> = 0> + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(_InputIterator __first, _InputIterator __last) + : __r_(__default_init_tag(), __default_init_tag()) { + __init(__first, __last); + } + + template <class _InputIterator, __enable_if_t<__has_input_iterator_category<_InputIterator>::value, int> = 0> + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string(_InputIterator __first, _InputIterator __last, const allocator_type& __a) + : __r_(__default_init_tag(), __a) { + __init(__first, __last); + } + +#if _LIBCPP_STD_VER >= 23 + template <_ContainerCompatibleRange<_CharT> _Range> + _LIBCPP_HIDE_FROM_ABI constexpr + basic_string(from_range_t, _Range&& __range, const allocator_type& __a = allocator_type()) + : __r_(__default_init_tag(), __a) { + if constexpr (ranges::forward_range<_Range> || ranges::sized_range<_Range>) { + __init_with_size(ranges::begin(__range), ranges::end(__range), ranges::distance(__range)); + } else { + __init_with_sentinel(ranges::begin(__range), ranges::end(__range)); + } + } +#endif + +#ifndef _LIBCPP_CXX03_LANG + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(initializer_list<_CharT> __il) + : __r_(__default_init_tag(), __default_init_tag()) { + __init(__il.begin(), __il.end()); + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(initializer_list<_CharT> __il, const _Allocator& __a) + : __r_(__default_init_tag(), __a) { + __init(__il.begin(), __il.end()); + } +#endif // _LIBCPP_CXX03_LANG + + inline _LIBCPP_CONSTEXPR_SINCE_CXX20 ~basic_string() { + if (__is_long()) + __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + operator __self_view() const _NOEXCEPT { return __self_view(data(), size()); } + + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator=(const basic_string& __str); + + template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && + !__is_same_uncvref<_Tp, basic_string>::value, int> = 0> + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator=(const _Tp& __t) { + __self_view __sv = __t; + return assign(__sv); + } + +#ifndef _LIBCPP_CXX03_LANG + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator=(basic_string&& __str) + _NOEXCEPT_((__noexcept_move_assign_container<_Allocator, __alloc_traits>::value)) { + __move_assign(__str, integral_constant<bool, __alloc_traits::propagate_on_container_move_assignment::value>()); + return *this; + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string& operator=(initializer_list<value_type> __il) {return assign(__il.begin(), __il.size());} +#endif + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string& operator=(const value_type* __s) {return assign(__s);} +#if _LIBCPP_STD_VER >= 20 + basic_string& operator=(nullptr_t) = delete; +#endif + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator=(value_type __c); + +#ifndef _YNDX_LIBCPP_MAKE_STRING_ITERATOR_POINTERS == 1 + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + iterator begin() _NOEXCEPT + {return __make_iterator(__get_pointer());} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + const_iterator begin() const _NOEXCEPT + {return __make_const_iterator(__get_pointer());} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + iterator end() _NOEXCEPT + {return __make_iterator(__get_pointer() + size());} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + const_iterator end() const _NOEXCEPT + {return __make_const_iterator(__get_pointer() + size());} +#else + // It is necessary to keep the list of constructors matching the one above it. + // Made to support pointer iterators + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + iterator begin() _NOEXCEPT + {return iterator(__get_pointer());} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + const_iterator begin() const _NOEXCEPT + {return const_iterator(__get_pointer());} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + iterator end() _NOEXCEPT + {return iterator(__get_pointer() + size());} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + const_iterator end() const _NOEXCEPT + {return const_iterator(__get_pointer() + size());} +#endif // _YNDX_LIBCPP_MAKE_STRING_ITERATOR_POINTERS == 1 + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + reverse_iterator rbegin() _NOEXCEPT + {return reverse_iterator(end());} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + const_reverse_iterator rbegin() const _NOEXCEPT + {return const_reverse_iterator(end());} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + reverse_iterator rend() _NOEXCEPT + {return reverse_iterator(begin());} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + const_reverse_iterator rend() const _NOEXCEPT + {return const_reverse_iterator(begin());} + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + const_iterator cbegin() const _NOEXCEPT + {return begin();} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + const_iterator cend() const _NOEXCEPT + {return end();} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + const_reverse_iterator crbegin() const _NOEXCEPT + {return rbegin();} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + const_reverse_iterator crend() const _NOEXCEPT + {return rend();} + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type size() const _NOEXCEPT + {return __is_long() ? __get_long_size() : __get_short_size();} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type length() const _NOEXCEPT {return size();} + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type max_size() const _NOEXCEPT { + size_type __m = __alloc_traits::max_size(__alloc()); + if (__m <= std::numeric_limits<size_type>::max() / 2) { + return __m - __alignment; + } else { + bool __uses_lsb = __endian_factor == 2; + return __uses_lsb ? __m - __alignment : (__m / 2) - __alignment; + } + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type capacity() const _NOEXCEPT { + return (__is_long() ? __get_long_cap() : static_cast<size_type>(__min_cap)) - 1; + } + +#if _YNDX_LIBCXX_ENABLE_STRING_RESIZE_UNINITIALIZED == 1 + inline void resize_uninitialized(size_type __n) + { + __resize_default_init(__n); + } +#endif + + _LIBCPP_CONSTEXPR_SINCE_CXX20 void resize(size_type __n, value_type __c); + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void resize(size_type __n) { resize(__n, value_type()); } + + _LIBCPP_CONSTEXPR_SINCE_CXX20 void reserve(size_type __requested_capacity); + +#if _LIBCPP_STD_VER >= 23 + template <class _Op> + _LIBCPP_HIDE_FROM_ABI constexpr + void resize_and_overwrite(size_type __n, _Op __op) { + __resize_default_init(__n); + __erase_to_end(std::move(__op)(data(), _LIBCPP_AUTO_CAST(__n))); + } +#endif + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __resize_default_init(size_type __n); + + _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_HIDE_FROM_ABI void reserve() _NOEXCEPT { shrink_to_fit(); } + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void shrink_to_fit() _NOEXCEPT; + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void clear() _NOEXCEPT; + + _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + bool empty() const _NOEXCEPT {return size() == 0;} + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference operator[](size_type __pos) const _NOEXCEPT { + _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(__pos <= size(), "string index out of bounds"); + return *(data() + __pos); + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference operator[](size_type __pos) _NOEXCEPT { + _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(__pos <= size(), "string index out of bounds"); + return *(__get_pointer() + __pos); + } + + _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference at(size_type __n) const; + _LIBCPP_CONSTEXPR_SINCE_CXX20 reference at(size_type __n); + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator+=(const basic_string& __str) { + return append(__str); + } + + template <class _Tp, + __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && + !__is_same_uncvref<_Tp, basic_string >::value, + int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + operator+=(const _Tp& __t) { + __self_view __sv = __t; return append(__sv); + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator+=(const value_type* __s) { + return append(__s); + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator+=(value_type __c) { + push_back(__c); + return *this; + } + +#ifndef _LIBCPP_CXX03_LANG + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string& operator+=(initializer_list<value_type> __il) { return append(__il); } +#endif // _LIBCPP_CXX03_LANG + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(const basic_string& __str) { + return append(__str.data(), __str.size()); + } + + template <class _Tp, + __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && + !__is_same_uncvref<_Tp, basic_string>::value, + int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + append(const _Tp& __t) { + __self_view __sv = __t; + return append(__sv.data(), __sv.size()); + } + + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(const basic_string& __str, size_type __pos, size_type __n=npos); + + template <class _Tp, + __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && + !__is_same_uncvref<_Tp, basic_string>::value, + int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 + + basic_string& + append(const _Tp& __t, size_type __pos, size_type __n = npos); + + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(const value_type* __s, size_type __n); + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(const value_type* __s); + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(size_type __n, value_type __c); + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + void __append_default_init(size_type __n); + + template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + append(_InputIterator __first, _InputIterator __last) { + const basic_string __temp(__first, __last, __alloc()); + append(__temp.data(), __temp.size()); + return *this; + } + + template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + append(_ForwardIterator __first, _ForwardIterator __last); + +#if _LIBCPP_STD_VER >= 23 + template <_ContainerCompatibleRange<_CharT> _Range> + _LIBCPP_HIDE_FROM_ABI + constexpr basic_string& append_range(_Range&& __range) { + insert_range(end(), std::forward<_Range>(__range)); + return *this; + } +#endif + +#ifndef _LIBCPP_CXX03_LANG + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string& append(initializer_list<value_type> __il) {return append(__il.begin(), __il.size());} +#endif // _LIBCPP_CXX03_LANG + + _LIBCPP_CONSTEXPR_SINCE_CXX20 void push_back(value_type __c); + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void pop_back(); + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference front() _NOEXCEPT { + _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string::front(): string is empty"); + return *__get_pointer(); + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference front() const _NOEXCEPT { + _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string::front(): string is empty"); + return *data(); + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference back() _NOEXCEPT { + _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string::back(): string is empty"); + return *(__get_pointer() + size() - 1); + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference back() const _NOEXCEPT { + _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string::back(): string is empty"); + return *(data() + size() - 1); + } + + template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + assign(const _Tp& __t) { + __self_view __sv = __t; + return assign(__sv.data(), __sv.size()); + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string& assign(const basic_string& __str) { return *this = __str; } +#ifndef _LIBCPP_CXX03_LANG + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string& assign(basic_string&& __str) + _NOEXCEPT_((__noexcept_move_assign_container<_Allocator, __alloc_traits>::value)) + {*this = std::move(__str); return *this;} +#endif + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(const basic_string& __str, size_type __pos, size_type __n=npos); + + template <class _Tp, + __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && + !__is_same_uncvref<_Tp, basic_string>::value, + int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + assign(const _Tp& __t, size_type __pos, size_type __n = npos); + + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(const value_type* __s, size_type __n); + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(const value_type* __s); + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(size_type __n, value_type __c); + template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + assign(_InputIterator __first, _InputIterator __last); + + template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + assign(_ForwardIterator __first, _ForwardIterator __last); + +#if _LIBCPP_STD_VER >= 23 + template <_ContainerCompatibleRange<_CharT> _Range> + _LIBCPP_HIDE_FROM_ABI + constexpr basic_string& assign_range(_Range&& __range) { + if constexpr (__string_is_trivial_iterator<ranges::iterator_t<_Range>>::value && + (ranges::forward_range<_Range> || ranges::sized_range<_Range>)) { + size_type __n = static_cast<size_type>(ranges::distance(__range)); + __assign_trivial(ranges::begin(__range), ranges::end(__range), __n); + + } else { + __assign_with_sentinel(ranges::begin(__range), ranges::end(__range)); + } + + return *this; + } +#endif + +#ifndef _LIBCPP_CXX03_LANG + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string& assign(initializer_list<value_type> __il) {return assign(__il.begin(), __il.size());} +#endif // _LIBCPP_CXX03_LANG + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + insert(size_type __pos1, const basic_string& __str) { + return insert(__pos1, __str.data(), __str.size()); + } + + template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + insert(size_type __pos1, const _Tp& __t) { + __self_view __sv = __t; + return insert(__pos1, __sv.data(), __sv.size()); + } + + template <class _Tp, + __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && + !__is_same_uncvref<_Tp, basic_string>::value, + int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + insert(size_type __pos1, const _Tp& __t, size_type __pos2, size_type __n = npos); + + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + insert(size_type __pos1, const basic_string& __str, size_type __pos2, size_type __n = npos); + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& insert(size_type __pos, const value_type* __s, size_type __n); + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& insert(size_type __pos, const value_type* __s); + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& insert(size_type __pos, size_type __n, value_type __c); + _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator insert(const_iterator __pos, value_type __c); + +#if _LIBCPP_STD_VER >= 23 + template <_ContainerCompatibleRange<_CharT> _Range> + _LIBCPP_HIDE_FROM_ABI + constexpr iterator insert_range(const_iterator __position, _Range&& __range) { + if constexpr (ranges::forward_range<_Range> || ranges::sized_range<_Range>) { + auto __n = static_cast<size_type>(ranges::distance(__range)); + return __insert_with_size(__position, ranges::begin(__range), ranges::end(__range), __n); + + } else { + basic_string __temp(from_range, std::forward<_Range>(__range), __alloc()); + return insert(__position, __temp.data(), __temp.data() + __temp.size()); + } + } +#endif + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator + insert(const_iterator __pos, size_type __n, value_type __c) { + difference_type __p = __pos - begin(); + insert(static_cast<size_type>(__p), __n, __c); + return begin() + __p; + } + + template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator + insert(const_iterator __pos, _InputIterator __first, _InputIterator __last); + + template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator + insert(const_iterator __pos, _ForwardIterator __first, _ForwardIterator __last); + +#ifndef _LIBCPP_CXX03_LANG + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + iterator insert(const_iterator __pos, initializer_list<value_type> __il) + {return insert(__pos, __il.begin(), __il.end());} +#endif // _LIBCPP_CXX03_LANG + + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& erase(size_type __pos = 0, size_type __n = npos); + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + iterator erase(const_iterator __pos); + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + iterator erase(const_iterator __first, const_iterator __last); + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + replace(size_type __pos1, size_type __n1, const basic_string& __str) { + return replace(__pos1, __n1, __str.data(), __str.size()); + } + + template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + replace(size_type __pos1, size_type __n1, const _Tp& __t) { + __self_view __sv = __t; + return replace(__pos1, __n1, __sv.data(), __sv.size()); + } + + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + replace(size_type __pos1, size_type __n1, const basic_string& __str, size_type __pos2, size_type __n2 = npos); + + template <class _Tp, + __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && + !__is_same_uncvref<_Tp, basic_string>::value, + int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + replace(size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2 = npos); + + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + replace(size_type __pos, size_type __n1, const value_type* __s, size_type __n2); + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& replace(size_type __pos, size_type __n1, const value_type* __s); + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& replace(size_type __pos, size_type __n1, size_type __n2, value_type __c); + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + replace(const_iterator __i1, const_iterator __i2, const basic_string& __str) { + return replace( + static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __str.data(), __str.size()); + } + + template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + replace(const_iterator __i1, const_iterator __i2, const _Tp& __t) { + __self_view __sv = __t; + return replace(__i1 - begin(), __i2 - __i1, __sv); + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + replace(const_iterator __i1, const_iterator __i2, const value_type* __s, size_type __n) { + return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __s, __n); + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + replace(const_iterator __i1, const_iterator __i2, const value_type* __s) { + return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __s); + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + replace(const_iterator __i1, const_iterator __i2, size_type __n, value_type __c) { + return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __n, __c); + } + + template <class _InputIterator, __enable_if_t<__has_input_iterator_category<_InputIterator>::value, int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& + replace(const_iterator __i1, const_iterator __i2, _InputIterator __j1, _InputIterator __j2); + +#if _LIBCPP_STD_VER >= 23 + template <_ContainerCompatibleRange<_CharT> _Range> + _LIBCPP_HIDE_FROM_ABI + constexpr basic_string& replace_with_range(const_iterator __i1, const_iterator __i2, _Range&& __range) { + basic_string __temp(from_range, std::forward<_Range>(__range), __alloc()); + return replace(__i1, __i2, __temp); + } +#endif + +#ifndef _LIBCPP_CXX03_LANG + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string& replace(const_iterator __i1, const_iterator __i2, initializer_list<value_type> __il) + {return replace(__i1, __i2, __il.begin(), __il.end());} +#endif // _LIBCPP_CXX03_LANG + + _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type copy(value_type* __s, size_type __n, size_type __pos = 0) const; + +#if _LIBCPP_STD_VER <= 20 + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string substr(size_type __pos = 0, size_type __n = npos) const { + return basic_string(*this, __pos, __n); + } +#else + _LIBCPP_HIDE_FROM_ABI constexpr + basic_string substr(size_type __pos = 0, size_type __n = npos) const& { + return basic_string(*this, __pos, __n); + } + + _LIBCPP_HIDE_FROM_ABI constexpr + basic_string substr(size_type __pos = 0, size_type __n = npos) && { + return basic_string(std::move(*this), __pos, __n); + } +#endif + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + void swap(basic_string& __str) +#if _LIBCPP_STD_VER >= 14 + _NOEXCEPT; +#else + _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value || + __is_nothrow_swappable<allocator_type>::value); +#endif + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + const value_type* c_str() const _NOEXCEPT {return data();} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + const value_type* data() const _NOEXCEPT {return std::__to_address(__get_pointer());} +#if _LIBCPP_STD_VER >= 17 + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + value_type* data() _NOEXCEPT {return std::__to_address(__get_pointer());} +#endif + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + allocator_type get_allocator() const _NOEXCEPT {return __alloc();} + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type find(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; + + template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type + find(const _Tp& __t, size_type __pos = 0) const _NOEXCEPT; + + _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type find(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type find(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; + _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type find(value_type __c, size_type __pos = 0) const _NOEXCEPT; + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type rfind(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; + + template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type + rfind(const _Tp& __t, size_type __pos = npos) const _NOEXCEPT; + + _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type rfind(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type rfind(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; + _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type rfind(value_type __c, size_type __pos = npos) const _NOEXCEPT; + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type find_first_of(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; + + template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type + find_first_of(const _Tp& __t, size_type __pos = 0) const _NOEXCEPT; + + _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type find_first_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type find_first_of(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type find_first_of(value_type __c, size_type __pos = 0) const _NOEXCEPT; + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type find_last_of(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; + + template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type + find_last_of(const _Tp& __t, size_type __pos = npos) const _NOEXCEPT; + + _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type find_last_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type find_last_of(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type find_last_of(value_type __c, size_type __pos = npos) const _NOEXCEPT; + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type find_first_not_of(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; + + template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type + find_first_not_of(const _Tp& __t, size_type __pos = 0) const _NOEXCEPT; + + _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type find_first_not_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type find_first_not_of(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type find_first_not_of(value_type __c, size_type __pos = 0) const _NOEXCEPT; + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type find_last_not_of(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; + + template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type + find_last_not_of(const _Tp& __t, size_type __pos = npos) const _NOEXCEPT; + + _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type find_last_not_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type find_last_not_of(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type find_last_not_of(value_type __c, size_type __pos = npos) const _NOEXCEPT; + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + int compare(const basic_string& __str) const _NOEXCEPT; + + template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 int + compare(const _Tp& __t) const _NOEXCEPT; + + template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> + _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 int + compare(size_type __pos1, size_type __n1, const _Tp& __t) const; + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + int compare(size_type __pos1, size_type __n1, const basic_string& __str) const; + _LIBCPP_CONSTEXPR_SINCE_CXX20 + int compare(size_type __pos1, size_type __n1, const basic_string& __str, size_type __pos2, + size_type __n2 = npos) const; + + template <class _Tp, + __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && + !__is_same_uncvref<_Tp, basic_string>::value, + int> = 0> + inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 int + compare(size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2 = npos) const; + + _LIBCPP_CONSTEXPR_SINCE_CXX20 int compare(const value_type* __s) const _NOEXCEPT; + _LIBCPP_CONSTEXPR_SINCE_CXX20 int compare(size_type __pos1, size_type __n1, const value_type* __s) const; + _LIBCPP_CONSTEXPR_SINCE_CXX20 + int compare(size_type __pos1, size_type __n1, const value_type* __s, size_type __n2) const; + +#if _LIBCPP_STD_VER >= 20 + constexpr _LIBCPP_HIDE_FROM_ABI + bool starts_with(__self_view __sv) const noexcept + { return __self_view(data(), size()).starts_with(__sv); } + + constexpr _LIBCPP_HIDE_FROM_ABI + bool starts_with(value_type __c) const noexcept + { return !empty() && _Traits::eq(front(), __c); } + + constexpr _LIBCPP_HIDE_FROM_ABI + bool starts_with(const value_type* __s) const noexcept + { return starts_with(__self_view(__s)); } + + constexpr _LIBCPP_HIDE_FROM_ABI + bool ends_with(__self_view __sv) const noexcept + { return __self_view(data(), size()).ends_with( __sv); } + + constexpr _LIBCPP_HIDE_FROM_ABI + bool ends_with(value_type __c) const noexcept + { return !empty() && _Traits::eq(back(), __c); } + + constexpr _LIBCPP_HIDE_FROM_ABI + bool ends_with(const value_type* __s) const noexcept + { return ends_with(__self_view(__s)); } +#endif + +#if _LIBCPP_STD_VER >= 20 + constexpr _LIBCPP_HIDE_FROM_ABI + bool contains(__self_view __sv) const noexcept + { return __self_view(data(), size()).contains(__sv); } + + constexpr _LIBCPP_HIDE_FROM_ABI + bool contains(value_type __c) const noexcept + { return __self_view(data(), size()).contains(__c); } + + constexpr _LIBCPP_HIDE_FROM_ABI + bool contains(const value_type* __s) const + { return __self_view(data(), size()).contains(__s); } +#endif + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool __invariants() const; + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __clear_and_shrink() _NOEXCEPT; + +private: + template<class _Alloc> + inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + bool friend operator==(const basic_string<char, char_traits<char>, _Alloc>& __lhs, + const basic_string<char, char_traits<char>, _Alloc>& __rhs) _NOEXCEPT; + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __shrink_or_extend(size_type __target_capacity); + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + bool __is_long() const _NOEXCEPT { + if (__libcpp_is_constant_evaluated()) + return true; + return __r_.first().__s.__is_long_; + } + + static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __begin_lifetime(pointer __begin, size_type __n) { +#if _LIBCPP_STD_VER >= 20 + if (__libcpp_is_constant_evaluated()) { + for (size_type __i = 0; __i != __n; ++__i) + std::construct_at(std::addressof(__begin[__i])); + } +#else + (void)__begin; + (void)__n; +#endif // _LIBCPP_STD_VER >= 20 + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __default_init() { + __r_.first() = __rep(); + if (__libcpp_is_constant_evaluated()) { + size_type __sz = __recommend(0) + 1; + pointer __ptr = __alloc_traits::allocate(__alloc(), __sz); + __begin_lifetime(__ptr, __sz); + __set_long_pointer(__ptr); + __set_long_cap(__sz); + __set_long_size(0); + } + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __deallocate_constexpr() { + if (__libcpp_is_constant_evaluated() && __get_pointer() != nullptr) + __alloc_traits::deallocate(__alloc(), __get_pointer(), __get_long_cap()); + } + + _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI static bool __fits_in_sso(size_type __sz) { + // SSO is disabled during constant evaluation because `__is_long` isn't constexpr friendly + return !__libcpp_is_constant_evaluated() && (__sz < __min_cap); + } + + template <class _Iterator, class _Sentinel> + _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI + void __assign_trivial(_Iterator __first, _Sentinel __last, size_type __n); + + template <class _Iterator, class _Sentinel> + _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI + void __assign_with_sentinel(_Iterator __first, _Sentinel __last); + + template <class _ForwardIterator, class _Sentinel> + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 + iterator __insert_from_safe_copy(size_type __n, size_type __ip, _ForwardIterator __first, _Sentinel __last) { + size_type __sz = size(); + size_type __cap = capacity(); + value_type* __p; + if (__cap - __sz >= __n) + { + __p = std::__to_address(__get_pointer()); + size_type __n_move = __sz - __ip; + if (__n_move != 0) + traits_type::move(__p + __ip + __n, __p + __ip, __n_move); + } + else + { + __grow_by_without_replace(__cap, __sz + __n - __cap, __sz, __ip, 0, __n); + __p = std::__to_address(__get_long_pointer()); + } + __sz += __n; + __set_size(__sz); + traits_type::assign(__p[__sz], value_type()); + for (__p += __ip; __first != __last; ++__p, ++__first) + traits_type::assign(*__p, *__first); + + return begin() + __ip; + } + + template<class _Iterator, class _Sentinel> + _LIBCPP_CONSTEXPR_SINCE_CXX20 + iterator __insert_with_size(const_iterator __pos, _Iterator __first, _Sentinel __last, size_type __n); + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 allocator_type& __alloc() _NOEXCEPT { return __r_.second(); } + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR const allocator_type& __alloc() const _NOEXCEPT { return __r_.second(); } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + void __set_short_size(size_type __s) _NOEXCEPT { + _LIBCPP_ASSERT_INTERNAL( + __s < __min_cap, "__s should never be greater than or equal to the short string capacity"); + __r_.first().__s.__size_ = __s; + __r_.first().__s.__is_long_ = false; + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type __get_short_size() const _NOEXCEPT { + _LIBCPP_ASSERT_INTERNAL( + !__r_.first().__s.__is_long_, "String has to be short when trying to get the short size"); + return __r_.first().__s.__size_; + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + void __set_long_size(size_type __s) _NOEXCEPT + {__r_.first().__l.__size_ = __s;} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type __get_long_size() const _NOEXCEPT + {return __r_.first().__l.__size_;} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + void __set_size(size_type __s) _NOEXCEPT + {if (__is_long()) __set_long_size(__s); else __set_short_size(__s);} + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + void __set_long_cap(size_type __s) _NOEXCEPT { + __r_.first().__l.__cap_ = __s / __endian_factor; + __r_.first().__l.__is_long_ = true; + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type __get_long_cap() const _NOEXCEPT { + return __r_.first().__l.__cap_ * __endian_factor; + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + void __set_long_pointer(pointer __p) _NOEXCEPT + {__r_.first().__l.__data_ = __p;} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + pointer __get_long_pointer() _NOEXCEPT + {return __r_.first().__l.__data_;} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + const_pointer __get_long_pointer() const _NOEXCEPT + {return __r_.first().__l.__data_;} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + pointer __get_short_pointer() _NOEXCEPT + {return pointer_traits<pointer>::pointer_to(__r_.first().__s.__data_[0]);} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + const_pointer __get_short_pointer() const _NOEXCEPT + {return pointer_traits<const_pointer>::pointer_to(__r_.first().__s.__data_[0]);} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + pointer __get_pointer() _NOEXCEPT + {return __is_long() ? __get_long_pointer() : __get_short_pointer();} + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + const_pointer __get_pointer() const _NOEXCEPT + {return __is_long() ? __get_long_pointer() : __get_short_pointer();} + + template <size_type __a> static + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type __align_it(size_type __s) _NOEXCEPT + {return (__s + (__a-1)) & ~(__a-1);} + enum {__alignment = 16}; + static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + size_type __recommend(size_type __s) _NOEXCEPT + { + if (__s < __min_cap) { + if (__libcpp_is_constant_evaluated()) + return static_cast<size_type>(__min_cap); + else + return static_cast<size_type>(__min_cap) - 1; + } + size_type __guess = __align_it<sizeof(value_type) < __alignment ? + __alignment/sizeof(value_type) : 1 > (__s+1) - 1; + if (__guess == __min_cap) ++__guess; + return __guess; + } + + inline _LIBCPP_CONSTEXPR_SINCE_CXX20 + void __init(const value_type* __s, size_type __sz, size_type __reserve); + inline _LIBCPP_CONSTEXPR_SINCE_CXX20 + void __init(const value_type* __s, size_type __sz); + inline _LIBCPP_CONSTEXPR_SINCE_CXX20 + void __init(size_type __n, value_type __c); + + // Slow path for the (inlined) copy constructor for 'long' strings. + // Always externally instantiated and not inlined. + // Requires that __s is zero terminated. + // The main reason for this function to exist is because for unstable, we + // want to allow inlining of the copy constructor. However, we don't want + // to call the __init() functions as those are marked as inline which may + // result in over-aggressive inlining by the compiler, where our aim is + // to only inline the fast path code directly in the ctor. + _LIBCPP_CONSTEXPR_SINCE_CXX20 void __init_copy_ctor_external(const value_type* __s, size_type __sz); + + template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> = 0> + inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void __init(_InputIterator __first, _InputIterator __last); + + template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> = 0> + inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void __init(_ForwardIterator __first, _ForwardIterator __last); + + template <class _InputIterator, class _Sentinel> + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + void __init_with_sentinel(_InputIterator __first, _Sentinel __last); + template <class _InputIterator, class _Sentinel> + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + void __init_with_size(_InputIterator __first, _Sentinel __last, size_type __sz); + + _LIBCPP_CONSTEXPR_SINCE_CXX20 +#if _LIBCPP_ABI_VERSION >= 2 // We want to use the function in the dylib in ABIv1 + _LIBCPP_HIDE_FROM_ABI +#endif + _LIBCPP_DEPRECATED_("use __grow_by_without_replace") + void __grow_by(size_type __old_cap, size_type __delta_cap, size_type __old_sz, + size_type __n_copy, size_type __n_del, size_type __n_add = 0); + _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI + void __grow_by_without_replace(size_type __old_cap, size_type __delta_cap, size_type __old_sz, + size_type __n_copy, size_type __n_del, size_type __n_add = 0); + _LIBCPP_CONSTEXPR_SINCE_CXX20 + void __grow_by_and_replace(size_type __old_cap, size_type __delta_cap, size_type __old_sz, + size_type __n_copy, size_type __n_del, + size_type __n_add, const value_type* __p_new_stuff); + + // __assign_no_alias is invoked for assignment operations where we + // have proof that the input does not alias the current instance. + // For example, operator=(basic_string) performs a 'self' check. + template <bool __is_short> + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& __assign_no_alias(const value_type* __s, size_type __n); + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __erase_to_end(size_type __pos) { + __null_terminate_at(std::__to_address(__get_pointer()), __pos); + } + + // __erase_external_with_move is invoked for erase() invocations where + // `n ~= npos`, likely requiring memory moves on the string data. + _LIBCPP_CONSTEXPR_SINCE_CXX20 void __erase_external_with_move(size_type __pos, size_type __n); + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + void __copy_assign_alloc(const basic_string& __str) + {__copy_assign_alloc(__str, integral_constant<bool, + __alloc_traits::propagate_on_container_copy_assignment::value>());} + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + void __copy_assign_alloc(const basic_string& __str, true_type) + { + if (__alloc() == __str.__alloc()) + __alloc() = __str.__alloc(); + else + { + if (!__str.__is_long()) + { + __clear_and_shrink(); + __alloc() = __str.__alloc(); + } + else + { + allocator_type __a = __str.__alloc(); + auto __allocation = std::__allocate_at_least(__a, __str.__get_long_cap()); + __begin_lifetime(__allocation.ptr, __allocation.count); + if (__is_long()) + __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); + __alloc() = std::move(__a); + __set_long_pointer(__allocation.ptr); + __set_long_cap(__allocation.count); + __set_long_size(__str.size()); + } + } + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + void __copy_assign_alloc(const basic_string&, false_type) _NOEXCEPT + {} + +#ifndef _LIBCPP_CXX03_LANG + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + void __move_assign(basic_string& __str, false_type) + _NOEXCEPT_(__alloc_traits::is_always_equal::value); + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + void __move_assign(basic_string& __str, true_type) +#if _LIBCPP_STD_VER >= 17 + _NOEXCEPT; +#else + _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value); +#endif +#endif + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + void + __move_assign_alloc(basic_string& __str) + _NOEXCEPT_( + !__alloc_traits::propagate_on_container_move_assignment::value || + is_nothrow_move_assignable<allocator_type>::value) + {__move_assign_alloc(__str, integral_constant<bool, + __alloc_traits::propagate_on_container_move_assignment::value>());} + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + void __move_assign_alloc(basic_string& __c, true_type) + _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value) + { + __alloc() = std::move(__c.__alloc()); + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + void __move_assign_alloc(basic_string&, false_type) + _NOEXCEPT + {} + + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& __assign_external(const value_type* __s); + _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& __assign_external(const value_type* __s, size_type __n); + + // Assigns the value in __s, guaranteed to be __n < __min_cap in length. + inline basic_string& __assign_short(const value_type* __s, size_type __n) { + pointer __p = __is_long() + ? (__set_long_size(__n), __get_long_pointer()) + : (__set_short_size(__n), __get_short_pointer()); + traits_type::move(std::__to_address(__p), __s, __n); + traits_type::assign(__p[__n], value_type()); + return *this; + } + + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string& __null_terminate_at(value_type* __p, size_type __newsz) { + __set_size(__newsz); + traits_type::assign(__p[__newsz], value_type()); + return *this; + } + + template <class _Tp> + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool __addr_in_range(const _Tp& __v) const { + return std::__is_pointer_in_range(data(), data() + size() + 1, std::addressof(__v)); + } + + _LIBCPP_NORETURN _LIBCPP_HIDE_FROM_ABI + void __throw_length_error() const { + std::__throw_length_error("basic_string"); + } + + _LIBCPP_NORETURN _LIBCPP_HIDE_FROM_ABI + void __throw_out_of_range() const { + std::__throw_out_of_range("basic_string"); + } + + friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+<>(const basic_string&, const basic_string&); + friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+<>(const value_type*, const basic_string&); + friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+<>(value_type, const basic_string&); + friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+<>(const basic_string&, const value_type*); + friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+<>(const basic_string&, value_type); +}; + +// These declarations must appear before any functions are implicitly used +// so that they have the correct visibility specifier. +#define _LIBCPP_DECLARE(...) extern template __VA_ARGS__; +#ifdef _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION + _LIBCPP_STRING_UNSTABLE_EXTERN_TEMPLATE_LIST(_LIBCPP_DECLARE, char) +# ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS + _LIBCPP_STRING_UNSTABLE_EXTERN_TEMPLATE_LIST(_LIBCPP_DECLARE, wchar_t) +# endif +#else + _LIBCPP_STRING_V1_EXTERN_TEMPLATE_LIST(_LIBCPP_DECLARE, char) +# ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS + _LIBCPP_STRING_V1_EXTERN_TEMPLATE_LIST(_LIBCPP_DECLARE, wchar_t) +# endif +#endif +#undef _LIBCPP_DECLARE + + +#if _LIBCPP_STD_VER >= 17 +template<class _InputIterator, + class _CharT = __iter_value_type<_InputIterator>, + class _Allocator = allocator<_CharT>, + class = enable_if_t<__has_input_iterator_category<_InputIterator>::value>, + class = enable_if_t<__is_allocator<_Allocator>::value> + > +basic_string(_InputIterator, _InputIterator, _Allocator = _Allocator()) + -> basic_string<_CharT, char_traits<_CharT>, _Allocator>; + +template<class _CharT, + class _Traits, + class _Allocator = allocator<_CharT>, + class = enable_if_t<__is_allocator<_Allocator>::value> + > +explicit basic_string(basic_string_view<_CharT, _Traits>, const _Allocator& = _Allocator()) + -> basic_string<_CharT, _Traits, _Allocator>; + +template<class _CharT, + class _Traits, + class _Allocator = allocator<_CharT>, + class = enable_if_t<__is_allocator<_Allocator>::value>, + class _Sz = typename allocator_traits<_Allocator>::size_type + > +basic_string(basic_string_view<_CharT, _Traits>, _Sz, _Sz, const _Allocator& = _Allocator()) + -> basic_string<_CharT, _Traits, _Allocator>; +#endif + +#if _LIBCPP_STD_VER >= 23 +template <ranges::input_range _Range, + class _Allocator = allocator<ranges::range_value_t<_Range>>, + class = enable_if_t<__is_allocator<_Allocator>::value> + > +basic_string(from_range_t, _Range&&, _Allocator = _Allocator()) + -> basic_string<ranges::range_value_t<_Range>, char_traits<ranges::range_value_t<_Range>>, _Allocator>; +#endif + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +void basic_string<_CharT, _Traits, _Allocator>::__init(const value_type* __s, + size_type __sz, + size_type __reserve) +{ + if (__libcpp_is_constant_evaluated()) + __r_.first() = __rep(); + if (__reserve > max_size()) + __throw_length_error(); + pointer __p; + if (__fits_in_sso(__reserve)) + { + __set_short_size(__sz); + __p = __get_short_pointer(); + } + else + { + auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__reserve) + 1); + __p = __allocation.ptr; + __begin_lifetime(__p, __allocation.count); + __set_long_pointer(__p); + __set_long_cap(__allocation.count); + __set_long_size(__sz); + } + traits_type::copy(std::__to_address(__p), __s, __sz); + traits_type::assign(__p[__sz], value_type()); +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +void +basic_string<_CharT, _Traits, _Allocator>::__init(const value_type* __s, size_type __sz) +{ + if (__libcpp_is_constant_evaluated()) + __r_.first() = __rep(); + if (__sz > max_size()) + __throw_length_error(); + pointer __p; + if (__fits_in_sso(__sz)) + { + __set_short_size(__sz); + __p = __get_short_pointer(); + } + else + { + auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__sz) + 1); + __p = __allocation.ptr; + __begin_lifetime(__p, __allocation.count); + __set_long_pointer(__p); + __set_long_cap(__allocation.count); + __set_long_size(__sz); + } + traits_type::copy(std::__to_address(__p), __s, __sz); + traits_type::assign(__p[__sz], value_type()); +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +void basic_string<_CharT, _Traits, _Allocator>::__init_copy_ctor_external( + const value_type* __s, size_type __sz) { + if (__libcpp_is_constant_evaluated()) + __r_.first() = __rep(); + + pointer __p; + if (__fits_in_sso(__sz)) { + __p = __get_short_pointer(); + __set_short_size(__sz); + } else { + if (__sz > max_size()) + __throw_length_error(); + auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__sz) + 1); + __p = __allocation.ptr; + __begin_lifetime(__p, __allocation.count); + __set_long_pointer(__p); + __set_long_cap(__allocation.count); + __set_long_size(__sz); + } + traits_type::copy(std::__to_address(__p), __s, __sz + 1); +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +void +basic_string<_CharT, _Traits, _Allocator>::__init(size_type __n, value_type __c) +{ + if (__libcpp_is_constant_evaluated()) + __r_.first() = __rep(); + + if (__n > max_size()) + __throw_length_error(); + pointer __p; + if (__fits_in_sso(__n)) + { + __set_short_size(__n); + __p = __get_short_pointer(); + } + else + { + auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__n) + 1); + __p = __allocation.ptr; + __begin_lifetime(__p, __allocation.count); + __set_long_pointer(__p); + __set_long_cap(__allocation.count); + __set_long_size(__n); + } + traits_type::assign(std::__to_address(__p), __n, __c); + traits_type::assign(__p[__n], value_type()); +} + +template <class _CharT, class _Traits, class _Allocator> +template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> > +_LIBCPP_CONSTEXPR_SINCE_CXX20 +void basic_string<_CharT, _Traits, _Allocator>::__init(_InputIterator __first, _InputIterator __last) +{ + __init_with_sentinel(std::move(__first), std::move(__last)); +} + +template <class _CharT, class _Traits, class _Allocator> +template <class _InputIterator, class _Sentinel> +_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 +void basic_string<_CharT, _Traits, _Allocator>::__init_with_sentinel(_InputIterator __first, _Sentinel __last) { + __default_init(); + +#ifndef _LIBCPP_HAS_NO_EXCEPTIONS + try + { +#endif // _LIBCPP_HAS_NO_EXCEPTIONS + for (; __first != __last; ++__first) + push_back(*__first); +#ifndef _LIBCPP_HAS_NO_EXCEPTIONS + } + catch (...) + { + if (__is_long()) + __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); + throw; + } +#endif // _LIBCPP_HAS_NO_EXCEPTIONS +} + +template <class _CharT, class _Traits, class _Allocator> +template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> > +_LIBCPP_CONSTEXPR_SINCE_CXX20 void +basic_string<_CharT, _Traits, _Allocator>::__init(_ForwardIterator __first, _ForwardIterator __last) +{ + size_type __sz = static_cast<size_type>(std::distance(__first, __last)); + __init_with_size(__first, __last, __sz); +} + +template <class _CharT, class _Traits, class _Allocator> +template <class _InputIterator, class _Sentinel> +_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 +void basic_string<_CharT, _Traits, _Allocator>::__init_with_size( + _InputIterator __first, _Sentinel __last, size_type __sz) { + if (__libcpp_is_constant_evaluated()) + __r_.first() = __rep(); + + if (__sz > max_size()) + __throw_length_error(); + + pointer __p; + if (__fits_in_sso(__sz)) + { + __set_short_size(__sz); + __p = __get_short_pointer(); + + } + else + { + auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__sz) + 1); + __p = __allocation.ptr; + __begin_lifetime(__p, __allocation.count); + __set_long_pointer(__p); + __set_long_cap(__allocation.count); + __set_long_size(__sz); + } + +#ifndef _LIBCPP_HAS_NO_EXCEPTIONS + try + { +#endif // _LIBCPP_HAS_NO_EXCEPTIONS + for (; __first != __last; ++__first, (void) ++__p) + traits_type::assign(*__p, *__first); + traits_type::assign(*__p, value_type()); +#ifndef _LIBCPP_HAS_NO_EXCEPTIONS + } + catch (...) + { + if (__is_long()) + __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); + throw; + } +#endif // _LIBCPP_HAS_NO_EXCEPTIONS +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +void +basic_string<_CharT, _Traits, _Allocator>::__grow_by_and_replace + (size_type __old_cap, size_type __delta_cap, size_type __old_sz, + size_type __n_copy, size_type __n_del, size_type __n_add, const value_type* __p_new_stuff) +{ + size_type __ms = max_size(); + if (__delta_cap > __ms - __old_cap - 1) + __throw_length_error(); + pointer __old_p = __get_pointer(); + size_type __cap = __old_cap < __ms / 2 - __alignment ? + __recommend(std::max(__old_cap + __delta_cap, 2 * __old_cap)) : + __ms - 1; + auto __allocation = std::__allocate_at_least(__alloc(), __cap + 1); + pointer __p = __allocation.ptr; + __begin_lifetime(__p, __allocation.count); + if (__n_copy != 0) + traits_type::copy(std::__to_address(__p), + std::__to_address(__old_p), __n_copy); + if (__n_add != 0) + traits_type::copy(std::__to_address(__p) + __n_copy, __p_new_stuff, __n_add); + size_type __sec_cp_sz = __old_sz - __n_del - __n_copy; + if (__sec_cp_sz != 0) + traits_type::copy(std::__to_address(__p) + __n_copy + __n_add, + std::__to_address(__old_p) + __n_copy + __n_del, __sec_cp_sz); + if (__old_cap+1 != __min_cap || __libcpp_is_constant_evaluated()) + __alloc_traits::deallocate(__alloc(), __old_p, __old_cap+1); + __set_long_pointer(__p); + __set_long_cap(__allocation.count); + __old_sz = __n_copy + __n_add + __sec_cp_sz; + __set_long_size(__old_sz); + traits_type::assign(__p[__old_sz], value_type()); +} + +// __grow_by is deprecated because it does not set the size. It may not update the size when the size is changed, and it +// may also not set the size at all when the string was short initially. This leads to unpredictable size value. It is +// not removed or changed to avoid breaking the ABI. +template <class _CharT, class _Traits, class _Allocator> +void +_LIBCPP_CONSTEXPR_SINCE_CXX20 +#if _LIBCPP_ABI_VERSION >= 2 // We want to use the function in the dylib in ABIv1 + _LIBCPP_HIDE_FROM_ABI +#endif + _LIBCPP_DEPRECATED_("use __grow_by_without_replace") +basic_string<_CharT, _Traits, _Allocator>::__grow_by(size_type __old_cap, size_type __delta_cap, size_type __old_sz, + size_type __n_copy, size_type __n_del, size_type __n_add) +{ + size_type __ms = max_size(); + if (__delta_cap > __ms - __old_cap) + __throw_length_error(); + pointer __old_p = __get_pointer(); + size_type __cap = __old_cap < __ms / 2 - __alignment ? + __recommend(std::max(__old_cap + __delta_cap, 2 * __old_cap)) : + __ms - 1; + auto __allocation = std::__allocate_at_least(__alloc(), __cap + 1); + pointer __p = __allocation.ptr; + __begin_lifetime(__p, __allocation.count); + if (__n_copy != 0) + traits_type::copy(std::__to_address(__p), + std::__to_address(__old_p), __n_copy); + size_type __sec_cp_sz = __old_sz - __n_del - __n_copy; + if (__sec_cp_sz != 0) + traits_type::copy(std::__to_address(__p) + __n_copy + __n_add, + std::__to_address(__old_p) + __n_copy + __n_del, + __sec_cp_sz); + if (__libcpp_is_constant_evaluated() || __old_cap + 1 != __min_cap) + __alloc_traits::deallocate(__alloc(), __old_p, __old_cap + 1); + __set_long_pointer(__p); + __set_long_cap(__allocation.count); +} + +template <class _CharT, class _Traits, class _Allocator> +void _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI +basic_string<_CharT, _Traits, _Allocator>::__grow_by_without_replace( + size_type __old_cap, + size_type __delta_cap, + size_type __old_sz, + size_type __n_copy, + size_type __n_del, + size_type __n_add) { + _LIBCPP_SUPPRESS_DEPRECATED_PUSH + __grow_by(__old_cap, __delta_cap, __old_sz, __n_copy, __n_del, __n_add); + _LIBCPP_SUPPRESS_DEPRECATED_POP + __set_long_size(__old_sz - __n_del + __n_add); +} + +// assign + +template <class _CharT, class _Traits, class _Allocator> +template <bool __is_short> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::__assign_no_alias( + const value_type* __s, size_type __n) { + size_type __cap = __is_short ? static_cast<size_type>(__min_cap) : __get_long_cap(); + if (__n < __cap) { + pointer __p = __is_short ? __get_short_pointer() : __get_long_pointer(); + __is_short ? __set_short_size(__n) : __set_long_size(__n); + traits_type::copy(std::__to_address(__p), __s, __n); + traits_type::assign(__p[__n], value_type()); + } else { + size_type __sz = __is_short ? __get_short_size() : __get_long_size(); + __grow_by_and_replace(__cap - 1, __n - __cap + 1, __sz, 0, __sz, __n, __s); + } + return *this; +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::__assign_external( + const value_type* __s, size_type __n) { + size_type __cap = capacity(); + if (__cap >= __n) { + value_type* __p = std::__to_address(__get_pointer()); + traits_type::move(__p, __s, __n); + return __null_terminate_at(__p, __n); + } else { + size_type __sz = size(); + __grow_by_and_replace(__cap, __n - __cap, __sz, 0, __sz, __n, __s); + return *this; + } +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::assign(const value_type* __s, size_type __n) +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__n == 0 || __s != nullptr, "string::assign received nullptr"); + return (__builtin_constant_p(__n) && __fits_in_sso(__n)) + ? __assign_short(__s, __n) + : __assign_external(__s, __n); +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::assign(size_type __n, value_type __c) +{ + size_type __cap = capacity(); + if (__cap < __n) + { + size_type __sz = size(); + __grow_by_without_replace(__cap, __n - __cap, __sz, 0, __sz); + } + value_type* __p = std::__to_address(__get_pointer()); + traits_type::assign(__p, __n, __c); + return __null_terminate_at(__p, __n); +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::operator=(value_type __c) +{ + pointer __p; + if (__is_long()) + { + __p = __get_long_pointer(); + __set_long_size(1); + } + else + { + __p = __get_short_pointer(); + __set_short_size(1); + } + traits_type::assign(*__p, __c); + traits_type::assign(*++__p, value_type()); + return *this; +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::operator=(const basic_string& __str) +{ + if (this != std::addressof(__str)) { + __copy_assign_alloc(__str); + if (!__is_long()) { + if (!__str.__is_long()) { + __r_.first() = __str.__r_.first(); + } else { + return __assign_no_alias<true>(__str.data(), __str.size()); + } + } else { + return __assign_no_alias<false>(__str.data(), __str.size()); + } + } + return *this; +} + +#ifndef _LIBCPP_CXX03_LANG + +template <class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +void +basic_string<_CharT, _Traits, _Allocator>::__move_assign(basic_string& __str, false_type) + _NOEXCEPT_(__alloc_traits::is_always_equal::value) +{ + if (__alloc() != __str.__alloc()) + assign(__str); + else + __move_assign(__str, true_type()); +} + +template <class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +void +basic_string<_CharT, _Traits, _Allocator>::__move_assign(basic_string& __str, true_type) +#if _LIBCPP_STD_VER >= 17 + _NOEXCEPT +#else + _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value) +#endif +{ + if (__is_long()) { + __alloc_traits::deallocate(__alloc(), __get_long_pointer(), + __get_long_cap()); +#if _LIBCPP_STD_VER <= 14 + if (!is_nothrow_move_assignable<allocator_type>::value) { + __set_short_size(0); + traits_type::assign(__get_short_pointer()[0], value_type()); + } +#endif + } + __move_assign_alloc(__str); + __r_.first() = __str.__r_.first(); + if (__libcpp_is_constant_evaluated()) { + __str.__default_init(); + } else { + __str.__set_short_size(0); + traits_type::assign(__str.__get_short_pointer()[0], value_type()); + } +} + +#endif + +template <class _CharT, class _Traits, class _Allocator> +template<class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> > +_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::assign(_InputIterator __first, _InputIterator __last) +{ + __assign_with_sentinel(__first, __last); + return *this; +} + +template <class _CharT, class _Traits, class _Allocator> +template <class _InputIterator, class _Sentinel> +_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 +void +basic_string<_CharT, _Traits, _Allocator>::__assign_with_sentinel(_InputIterator __first, _Sentinel __last) { + const basic_string __temp(__init_with_sentinel_tag(), std::move(__first), std::move(__last), __alloc()); + assign(__temp.data(), __temp.size()); +} + +template <class _CharT, class _Traits, class _Allocator> +template<class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> > +_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::assign(_ForwardIterator __first, _ForwardIterator __last) +{ + if (__string_is_trivial_iterator<_ForwardIterator>::value) { + size_type __n = static_cast<size_type>(std::distance(__first, __last)); + __assign_trivial(__first, __last, __n); + } else { + __assign_with_sentinel(__first, __last); + } + + return *this; +} + +template <class _CharT, class _Traits, class _Allocator> +template <class _Iterator, class _Sentinel> +_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI +void +basic_string<_CharT, _Traits, _Allocator>::__assign_trivial(_Iterator __first, _Sentinel __last, size_type __n) { + _LIBCPP_ASSERT_INTERNAL( + __string_is_trivial_iterator<_Iterator>::value, "The iterator type given to `__assign_trivial` must be trivial"); + + size_type __cap = capacity(); + if (__cap < __n) { + // Unlike `append` functions, if the input range points into the string itself, there is no case that the input + // range could get invalidated by reallocation: + // 1. If the input range is a subset of the string itself, its size cannot exceed the capacity of the string, + // thus no reallocation would happen. + // 2. In the exotic case where the input range is the byte representation of the string itself, the string + // object itself stays valid even if reallocation happens. + size_type __sz = size(); + __grow_by_without_replace(__cap, __n - __cap, __sz, 0, __sz); + } + pointer __p = __get_pointer(); + for (; __first != __last; ++__p, (void) ++__first) + traits_type::assign(*__p, *__first); + traits_type::assign(*__p, value_type()); + __set_size(__n); +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::assign(const basic_string& __str, size_type __pos, size_type __n) +{ + size_type __sz = __str.size(); + if (__pos > __sz) + __throw_out_of_range(); + return assign(__str.data() + __pos, std::min(__n, __sz - __pos)); +} + +template <class _CharT, class _Traits, class _Allocator> +template <class _Tp, + __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && + !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, + int> > +_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::assign(const _Tp& __t, size_type __pos, size_type __n) { + __self_view __sv = __t; + size_type __sz = __sv.size(); + if (__pos > __sz) + __throw_out_of_range(); + return assign(__sv.data() + __pos, std::min(__n, __sz - __pos)); +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::__assign_external(const value_type* __s) { + return __assign_external(__s, traits_type::length(__s)); +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::assign(const value_type* __s) +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__s != nullptr, "string::assign received nullptr"); + return __builtin_constant_p(*__s) + ? (__fits_in_sso(traits_type::length(__s)) + ? __assign_short(__s, traits_type::length(__s)) + : __assign_external(__s, traits_type::length(__s))) + : __assign_external(__s); +} +// append + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::append(const value_type* __s, size_type __n) +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__n == 0 || __s != nullptr, "string::append received nullptr"); + size_type __cap = capacity(); + size_type __sz = size(); + if (__cap - __sz >= __n) + { + if (__n) + { + value_type* __p = std::__to_address(__get_pointer()); + traits_type::copy(__p + __sz, __s, __n); + __sz += __n; + __set_size(__sz); + traits_type::assign(__p[__sz], value_type()); + } + } + else + __grow_by_and_replace(__cap, __sz + __n - __cap, __sz, __sz, 0, __n, __s); + return *this; +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::append(size_type __n, value_type __c) +{ + if (__n) + { + size_type __cap = capacity(); + size_type __sz = size(); + if (__cap - __sz < __n) + __grow_by_without_replace(__cap, __sz + __n - __cap, __sz, __sz, 0); + pointer __p = __get_pointer(); + traits_type::assign(std::__to_address(__p) + __sz, __n, __c); + __sz += __n; + __set_size(__sz); + traits_type::assign(__p[__sz], value_type()); + } + return *this; +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 inline void +basic_string<_CharT, _Traits, _Allocator>::__append_default_init(size_type __n) +{ + if (__n) + { + size_type __cap = capacity(); + size_type __sz = size(); + if (__cap - __sz < __n) + __grow_by_without_replace(__cap, __sz + __n - __cap, __sz, __sz, 0); + pointer __p = __get_pointer(); + __sz += __n; + __set_size(__sz); + traits_type::assign(__p[__sz], value_type()); + } +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +void +basic_string<_CharT, _Traits, _Allocator>::push_back(value_type __c) +{ + bool __is_short = !__is_long(); + size_type __cap; + size_type __sz; + if (__is_short) + { + __cap = __min_cap - 1; + __sz = __get_short_size(); + } + else + { + __cap = __get_long_cap() - 1; + __sz = __get_long_size(); + } + if (__sz == __cap) + { + __grow_by_without_replace(__cap, 1, __sz, __sz, 0); + __is_short = false; // the string is always long after __grow_by + } + pointer __p = __get_pointer(); + if (__is_short) + { + __p = __get_short_pointer() + __sz; + __set_short_size(__sz+1); + } + else + { + __p = __get_long_pointer() + __sz; + __set_long_size(__sz+1); + } + traits_type::assign(*__p, __c); + traits_type::assign(*++__p, value_type()); +} + +template <class _CharT, class _Traits, class _Allocator> +template<class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> > +_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::append( + _ForwardIterator __first, _ForwardIterator __last) +{ + size_type __sz = size(); + size_type __cap = capacity(); + size_type __n = static_cast<size_type>(std::distance(__first, __last)); + if (__n) + { + if (__string_is_trivial_iterator<_ForwardIterator>::value && + !__addr_in_range(*__first)) + { + if (__cap - __sz < __n) + __grow_by_without_replace(__cap, __sz + __n - __cap, __sz, __sz, 0); + pointer __p = __get_pointer() + __sz; + for (; __first != __last; ++__p, (void) ++__first) + traits_type::assign(*__p, *__first); + traits_type::assign(*__p, value_type()); + __set_size(__sz + __n); + } + else + { + const basic_string __temp(__first, __last, __alloc()); + append(__temp.data(), __temp.size()); + } + } + return *this; +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::append(const basic_string& __str, size_type __pos, size_type __n) +{ + size_type __sz = __str.size(); + if (__pos > __sz) + __throw_out_of_range(); + return append(__str.data() + __pos, std::min(__n, __sz - __pos)); +} + +template <class _CharT, class _Traits, class _Allocator> +template <class _Tp, + __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && + !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, + int> > +_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::append(const _Tp& __t, size_type __pos, size_type __n) { + __self_view __sv = __t; + size_type __sz = __sv.size(); + if (__pos > __sz) + __throw_out_of_range(); + return append(__sv.data() + __pos, std::min(__n, __sz - __pos)); +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::append(const value_type* __s) +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__s != nullptr, "string::append received nullptr"); + return append(__s, traits_type::length(__s)); +} + +// insert + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, const value_type* __s, size_type __n) +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__n == 0 || __s != nullptr, "string::insert received nullptr"); + size_type __sz = size(); + if (__pos > __sz) + __throw_out_of_range(); + size_type __cap = capacity(); + if (__libcpp_is_constant_evaluated()) { + if (__cap - __sz >= __n) + __grow_by_and_replace(__cap, 0, __sz, __pos, 0, __n, __s); + else + __grow_by_and_replace(__cap, __sz + __n - __cap, __sz, __pos, 0, __n, __s); + return *this; + } + if (__cap - __sz >= __n) + { + if (__n) + { + value_type* __p = std::__to_address(__get_pointer()); + size_type __n_move = __sz - __pos; + if (__n_move != 0) + { + if (__p + __pos <= __s && __s < __p + __sz) + __s += __n; + traits_type::move(__p + __pos + __n, __p + __pos, __n_move); + } + traits_type::move(__p + __pos, __s, __n); + __sz += __n; + __set_size(__sz); + traits_type::assign(__p[__sz], value_type()); + } + } + else + __grow_by_and_replace(__cap, __sz + __n - __cap, __sz, __pos, 0, __n, __s); + return *this; +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, size_type __n, value_type __c) +{ + size_type __sz = size(); + if (__pos > __sz) + __throw_out_of_range(); + if (__n) + { + size_type __cap = capacity(); + value_type* __p; + if (__cap - __sz >= __n) + { + __p = std::__to_address(__get_pointer()); + size_type __n_move = __sz - __pos; + if (__n_move != 0) + traits_type::move(__p + __pos + __n, __p + __pos, __n_move); + } + else + { + __grow_by_without_replace(__cap, __sz + __n - __cap, __sz, __pos, 0, __n); + __p = std::__to_address(__get_long_pointer()); + } + traits_type::assign(__p + __pos, __n, __c); + __sz += __n; + __set_size(__sz); + traits_type::assign(__p[__sz], value_type()); + } + return *this; +} + +template <class _CharT, class _Traits, class _Allocator> +template<class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> > +_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::iterator +basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, _InputIterator __first, _InputIterator __last) +{ + const basic_string __temp(__first, __last, __alloc()); + return insert(__pos, __temp.data(), __temp.data() + __temp.size()); +} + +template <class _CharT, class _Traits, class _Allocator> +template<class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> > +_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::iterator +basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, _ForwardIterator __first, _ForwardIterator __last) +{ + auto __n = static_cast<size_type>(std::distance(__first, __last)); + return __insert_with_size(__pos, __first, __last, __n); +} + +template <class _CharT, class _Traits, class _Allocator> +template<class _Iterator, class _Sentinel> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::iterator +basic_string<_CharT, _Traits, _Allocator>::__insert_with_size( + const_iterator __pos, _Iterator __first, _Sentinel __last, size_type __n) { + size_type __ip = static_cast<size_type>(__pos - begin()); + if (__n == 0) + return begin() + __ip; + + if (__string_is_trivial_iterator<_Iterator>::value && !__addr_in_range(*__first)) + { + return __insert_from_safe_copy(__n, __ip, __first, __last); + } + else + { + const basic_string __temp(__init_with_sentinel_tag(), __first, __last, __alloc()); + return __insert_from_safe_copy(__n, __ip, __temp.begin(), __temp.end()); + } +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos1, const basic_string& __str, + size_type __pos2, size_type __n) +{ + size_type __str_sz = __str.size(); + if (__pos2 > __str_sz) + __throw_out_of_range(); + return insert(__pos1, __str.data() + __pos2, std::min(__n, __str_sz - __pos2)); +} + +template <class _CharT, class _Traits, class _Allocator> +template <class _Tp, + __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && + !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, + int> > +_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos1, const _Tp& __t, size_type __pos2, size_type __n) { + __self_view __sv = __t; + size_type __str_sz = __sv.size(); + if (__pos2 > __str_sz) + __throw_out_of_range(); + return insert(__pos1, __sv.data() + __pos2, std::min(__n, __str_sz - __pos2)); +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, const value_type* __s) +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__s != nullptr, "string::insert received nullptr"); + return insert(__pos, __s, traits_type::length(__s)); +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::iterator +basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, value_type __c) +{ + size_type __ip = static_cast<size_type>(__pos - begin()); + size_type __sz = size(); + size_type __cap = capacity(); + value_type* __p; + if (__cap == __sz) + { + __grow_by_without_replace(__cap, 1, __sz, __ip, 0, 1); + __p = std::__to_address(__get_long_pointer()); + } + else + { + __p = std::__to_address(__get_pointer()); + size_type __n_move = __sz - __ip; + if (__n_move != 0) + traits_type::move(__p + __ip + 1, __p + __ip, __n_move); + } + traits_type::assign(__p[__ip], __c); + traits_type::assign(__p[++__sz], value_type()); + __set_size(__sz); + return begin() + static_cast<difference_type>(__ip); +} + +// replace + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, const value_type* __s, size_type __n2) + _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__n2 == 0 || __s != nullptr, "string::replace received nullptr"); + size_type __sz = size(); + if (__pos > __sz) + __throw_out_of_range(); + __n1 = std::min(__n1, __sz - __pos); + size_type __cap = capacity(); + if (__cap - __sz + __n1 >= __n2) + { + value_type* __p = std::__to_address(__get_pointer()); + if (__n1 != __n2) + { + size_type __n_move = __sz - __pos - __n1; + if (__n_move != 0) + { + if (__n1 > __n2) + { + traits_type::move(__p + __pos, __s, __n2); + traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); + return __null_terminate_at(__p, __sz + (__n2 - __n1)); + } + if (std::__is_pointer_in_range(__p + __pos + 1, __p + __sz, __s)) + { + if (__p + __pos + __n1 <= __s) + __s += __n2 - __n1; + else // __p + __pos < __s < __p + __pos + __n1 + { + traits_type::move(__p + __pos, __s, __n1); + __pos += __n1; + __s += __n2; + __n2 -= __n1; + __n1 = 0; + } + } + traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); + } + } + traits_type::move(__p + __pos, __s, __n2); + return __null_terminate_at(__p, __sz + (__n2 - __n1)); + } + else + __grow_by_and_replace(__cap, __sz - __n1 + __n2 - __cap, __sz, __pos, __n1, __n2, __s); + return *this; +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, size_type __n2, value_type __c) +{ + size_type __sz = size(); + if (__pos > __sz) + __throw_out_of_range(); + __n1 = std::min(__n1, __sz - __pos); + size_type __cap = capacity(); + value_type* __p; + if (__cap - __sz + __n1 >= __n2) + { + __p = std::__to_address(__get_pointer()); + if (__n1 != __n2) + { + size_type __n_move = __sz - __pos - __n1; + if (__n_move != 0) + traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); + } + } + else + { + __grow_by_without_replace(__cap, __sz - __n1 + __n2 - __cap, __sz, __pos, __n1, __n2); + __p = std::__to_address(__get_long_pointer()); + } + traits_type::assign(__p + __pos, __n2, __c); + return __null_terminate_at(__p, __sz - (__n1 - __n2)); +} + +template <class _CharT, class _Traits, class _Allocator> +template<class _InputIterator, __enable_if_t<__has_input_iterator_category<_InputIterator>::value, int> > +_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::replace(const_iterator __i1, const_iterator __i2, + _InputIterator __j1, _InputIterator __j2) +{ + const basic_string __temp(__j1, __j2, __alloc()); + return replace(__i1, __i2, __temp); +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos1, size_type __n1, const basic_string& __str, + size_type __pos2, size_type __n2) +{ + size_type __str_sz = __str.size(); + if (__pos2 > __str_sz) + __throw_out_of_range(); + return replace(__pos1, __n1, __str.data() + __pos2, std::min(__n2, __str_sz - __pos2)); +} + +template <class _CharT, class _Traits, class _Allocator> +template <class _Tp, + __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && + !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, + int> > +_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::replace( + size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2) { + __self_view __sv = __t; + size_type __str_sz = __sv.size(); + if (__pos2 > __str_sz) + __throw_out_of_range(); + return replace(__pos1, __n1, __sv.data() + __pos2, std::min(__n2, __str_sz - __pos2)); +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, const value_type* __s) +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__s != nullptr, "string::replace received nullptr"); + return replace(__pos, __n1, __s, traits_type::length(__s)); +} + +// erase + +// 'externally instantiated' erase() implementation, called when __n != npos. +// Does not check __pos against size() +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +void +basic_string<_CharT, _Traits, _Allocator>::__erase_external_with_move( + size_type __pos, size_type __n) +{ + if (__n) + { + size_type __sz = size(); + value_type* __p = std::__to_address(__get_pointer()); + __n = std::min(__n, __sz - __pos); + size_type __n_move = __sz - __pos - __n; + if (__n_move != 0) + traits_type::move(__p + __pos, __p + __pos + __n, __n_move); + __null_terminate_at(__p, __sz - __n); + } +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator>& +basic_string<_CharT, _Traits, _Allocator>::erase(size_type __pos, + size_type __n) { + if (__pos > size()) + __throw_out_of_range(); + if (__n == npos) { + __erase_to_end(__pos); + } else { + __erase_external_with_move(__pos, __n); + } + return *this; +} + +template <class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::iterator +basic_string<_CharT, _Traits, _Allocator>::erase(const_iterator __pos) +{ + _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS( + __pos != end(), "string::erase(iterator) called with a non-dereferenceable iterator"); + iterator __b = begin(); + size_type __r = static_cast<size_type>(__pos - __b); + erase(__r, 1); + return __b + static_cast<difference_type>(__r); +} + +template <class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::iterator +basic_string<_CharT, _Traits, _Allocator>::erase(const_iterator __first, const_iterator __last) +{ + _LIBCPP_ASSERT_VALID_INPUT_RANGE(__first <= __last, "string::erase(first, last) called with invalid range"); + iterator __b = begin(); + size_type __r = static_cast<size_type>(__first - __b); + erase(__r, static_cast<size_type>(__last - __first)); + return __b + static_cast<difference_type>(__r); +} + +template <class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +void +basic_string<_CharT, _Traits, _Allocator>::pop_back() +{ + _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string::pop_back(): string is already empty"); + __erase_to_end(size() - 1); +} + +template <class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +void +basic_string<_CharT, _Traits, _Allocator>::clear() _NOEXCEPT +{ + if (__is_long()) + { + traits_type::assign(*__get_long_pointer(), value_type()); + __set_long_size(0); + } + else + { + traits_type::assign(*__get_short_pointer(), value_type()); + __set_short_size(0); + } +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +void +basic_string<_CharT, _Traits, _Allocator>::resize(size_type __n, value_type __c) +{ + size_type __sz = size(); + if (__n > __sz) + append(__n - __sz, __c); + else + __erase_to_end(__n); +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 inline void +basic_string<_CharT, _Traits, _Allocator>::__resize_default_init(size_type __n) +{ + size_type __sz = size(); + if (__n > __sz) { + __append_default_init(__n - __sz); + } else + __erase_to_end(__n); +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +void +basic_string<_CharT, _Traits, _Allocator>::reserve(size_type __requested_capacity) +{ + if (__requested_capacity > max_size()) + __throw_length_error(); + + // Make sure reserve(n) never shrinks. This is technically only required in C++20 + // and later (since P0966R1), however we provide consistent behavior in all Standard + // modes because this function is instantiated in the shared library. + if (__requested_capacity <= capacity()) + return; + + size_type __target_capacity = std::max(__requested_capacity, size()); + __target_capacity = __recommend(__target_capacity); + if (__target_capacity == capacity()) return; + + __shrink_or_extend(__target_capacity); +} + +template <class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +void +basic_string<_CharT, _Traits, _Allocator>::shrink_to_fit() _NOEXCEPT +{ + size_type __target_capacity = __recommend(size()); + if (__target_capacity == capacity()) return; + + __shrink_or_extend(__target_capacity); +} + +template <class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +void +basic_string<_CharT, _Traits, _Allocator>::__shrink_or_extend(size_type __target_capacity) +{ + size_type __cap = capacity(); + size_type __sz = size(); + + pointer __new_data, __p; + bool __was_long, __now_long; + if (__fits_in_sso(__target_capacity)) + { + __was_long = true; + __now_long = false; + __new_data = __get_short_pointer(); + __p = __get_long_pointer(); + } + else + { + if (__target_capacity > __cap) { + auto __allocation = std::__allocate_at_least(__alloc(), __target_capacity + 1); + __new_data = __allocation.ptr; + __target_capacity = __allocation.count - 1; + } + else + { + #ifndef _LIBCPP_HAS_NO_EXCEPTIONS + try + { + #endif // _LIBCPP_HAS_NO_EXCEPTIONS + auto __allocation = std::__allocate_at_least(__alloc(), __target_capacity + 1); + __new_data = __allocation.ptr; + __target_capacity = __allocation.count - 1; + #ifndef _LIBCPP_HAS_NO_EXCEPTIONS + } + catch (...) + { + return; + } + #else // _LIBCPP_HAS_NO_EXCEPTIONS + if (__new_data == nullptr) + return; + #endif // _LIBCPP_HAS_NO_EXCEPTIONS + } + __begin_lifetime(__new_data, __target_capacity + 1); + __now_long = true; + __was_long = __is_long(); + __p = __get_pointer(); + } + traits_type::copy(std::__to_address(__new_data), + std::__to_address(__p), size()+1); + if (__was_long) + __alloc_traits::deallocate(__alloc(), __p, __cap+1); + if (__now_long) + { + __set_long_cap(__target_capacity+1); + __set_long_size(__sz); + __set_long_pointer(__new_data); + } + else + __set_short_size(__sz); +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::const_reference +basic_string<_CharT, _Traits, _Allocator>::at(size_type __n) const +{ + if (__n >= size()) + __throw_out_of_range(); + return (*this)[__n]; +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::reference +basic_string<_CharT, _Traits, _Allocator>::at(size_type __n) +{ + if (__n >= size()) + __throw_out_of_range(); + return (*this)[__n]; +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::copy(value_type* __s, size_type __n, size_type __pos) const +{ + size_type __sz = size(); + if (__pos > __sz) + __throw_out_of_range(); + size_type __rlen = std::min(__n, __sz - __pos); + traits_type::copy(__s, data() + __pos, __rlen); + return __rlen; +} + +template <class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +void +basic_string<_CharT, _Traits, _Allocator>::swap(basic_string& __str) +#if _LIBCPP_STD_VER >= 14 + _NOEXCEPT +#else + _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value || + __is_nothrow_swappable<allocator_type>::value) +#endif +{ + _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR( + __alloc_traits::propagate_on_container_swap::value || + __alloc_traits::is_always_equal::value || + __alloc() == __str.__alloc(), "swapping non-equal allocators"); + std::swap(__r_.first(), __str.__r_.first()); + std::__swap_allocator(__alloc(), __str.__alloc()); +} + +// find + +template <class _Traits> +struct _LIBCPP_HIDDEN __traits_eq +{ + typedef typename _Traits::char_type char_type; + _LIBCPP_HIDE_FROM_ABI + bool operator()(const char_type& __x, const char_type& __y) _NOEXCEPT + {return _Traits::eq(__x, __y);} +}; + +template<class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find(const value_type* __s, + size_type __pos, + size_type __n) const _NOEXCEPT +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__n == 0 || __s != nullptr, "string::find(): received nullptr"); + return std::__str_find<value_type, size_type, traits_type, npos> + (data(), size(), __s, __pos, __n); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find(const basic_string& __str, + size_type __pos) const _NOEXCEPT +{ + return std::__str_find<value_type, size_type, traits_type, npos> + (data(), size(), __str.data(), __pos, __str.size()); +} + +template<class _CharT, class _Traits, class _Allocator> +template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > +_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find(const _Tp &__t, + size_type __pos) const _NOEXCEPT +{ + __self_view __sv = __t; + return std::__str_find<value_type, size_type, traits_type, npos> + (data(), size(), __sv.data(), __pos, __sv.size()); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find(const value_type* __s, + size_type __pos) const _NOEXCEPT +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__s != nullptr, "string::find(): received nullptr"); + return std::__str_find<value_type, size_type, traits_type, npos> + (data(), size(), __s, __pos, traits_type::length(__s)); +} + +template<class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find(value_type __c, + size_type __pos) const _NOEXCEPT +{ + return std::__str_find<value_type, size_type, traits_type, npos> + (data(), size(), __c, __pos); +} + +// rfind + +template<class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::rfind(const value_type* __s, + size_type __pos, + size_type __n) const _NOEXCEPT +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__n == 0 || __s != nullptr, "string::rfind(): received nullptr"); + return std::__str_rfind<value_type, size_type, traits_type, npos> + (data(), size(), __s, __pos, __n); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::rfind(const basic_string& __str, + size_type __pos) const _NOEXCEPT +{ + return std::__str_rfind<value_type, size_type, traits_type, npos> + (data(), size(), __str.data(), __pos, __str.size()); +} + +template<class _CharT, class _Traits, class _Allocator> +template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > +_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::rfind(const _Tp& __t, + size_type __pos) const _NOEXCEPT +{ + __self_view __sv = __t; + return std::__str_rfind<value_type, size_type, traits_type, npos> + (data(), size(), __sv.data(), __pos, __sv.size()); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::rfind(const value_type* __s, + size_type __pos) const _NOEXCEPT +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__s != nullptr, "string::rfind(): received nullptr"); + return std::__str_rfind<value_type, size_type, traits_type, npos> + (data(), size(), __s, __pos, traits_type::length(__s)); +} + +template<class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::rfind(value_type __c, + size_type __pos) const _NOEXCEPT +{ + return std::__str_rfind<value_type, size_type, traits_type, npos> + (data(), size(), __c, __pos); +} + +// find_first_of + +template<class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find_first_of(const value_type* __s, + size_type __pos, + size_type __n) const _NOEXCEPT +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__n == 0 || __s != nullptr, "string::find_first_of(): received nullptr"); + return std::__str_find_first_of<value_type, size_type, traits_type, npos> + (data(), size(), __s, __pos, __n); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find_first_of(const basic_string& __str, + size_type __pos) const _NOEXCEPT +{ + return std::__str_find_first_of<value_type, size_type, traits_type, npos> + (data(), size(), __str.data(), __pos, __str.size()); +} + +template<class _CharT, class _Traits, class _Allocator> +template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > +_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find_first_of(const _Tp& __t, + size_type __pos) const _NOEXCEPT +{ + __self_view __sv = __t; + return std::__str_find_first_of<value_type, size_type, traits_type, npos> + (data(), size(), __sv.data(), __pos, __sv.size()); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find_first_of(const value_type* __s, + size_type __pos) const _NOEXCEPT +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__s != nullptr, "string::find_first_of(): received nullptr"); + return std::__str_find_first_of<value_type, size_type, traits_type, npos> + (data(), size(), __s, __pos, traits_type::length(__s)); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find_first_of(value_type __c, + size_type __pos) const _NOEXCEPT +{ + return find(__c, __pos); +} + +// find_last_of + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find_last_of(const value_type* __s, + size_type __pos, + size_type __n) const _NOEXCEPT +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__n == 0 || __s != nullptr, "string::find_last_of(): received nullptr"); + return std::__str_find_last_of<value_type, size_type, traits_type, npos> + (data(), size(), __s, __pos, __n); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find_last_of(const basic_string& __str, + size_type __pos) const _NOEXCEPT +{ + return std::__str_find_last_of<value_type, size_type, traits_type, npos> + (data(), size(), __str.data(), __pos, __str.size()); +} + +template<class _CharT, class _Traits, class _Allocator> +template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > +_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find_last_of(const _Tp& __t, + size_type __pos) const _NOEXCEPT +{ + __self_view __sv = __t; + return std::__str_find_last_of<value_type, size_type, traits_type, npos> + (data(), size(), __sv.data(), __pos, __sv.size()); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find_last_of(const value_type* __s, + size_type __pos) const _NOEXCEPT +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__s != nullptr, "string::find_last_of(): received nullptr"); + return std::__str_find_last_of<value_type, size_type, traits_type, npos> + (data(), size(), __s, __pos, traits_type::length(__s)); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find_last_of(value_type __c, + size_type __pos) const _NOEXCEPT +{ + return rfind(__c, __pos); +} + +// find_first_not_of + +template<class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const value_type* __s, + size_type __pos, + size_type __n) const _NOEXCEPT +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__n == 0 || __s != nullptr, "string::find_first_not_of(): received nullptr"); + return std::__str_find_first_not_of<value_type, size_type, traits_type, npos> + (data(), size(), __s, __pos, __n); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const basic_string& __str, + size_type __pos) const _NOEXCEPT +{ + return std::__str_find_first_not_of<value_type, size_type, traits_type, npos> + (data(), size(), __str.data(), __pos, __str.size()); +} + +template<class _CharT, class _Traits, class _Allocator> +template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > +_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const _Tp& __t, + size_type __pos) const _NOEXCEPT +{ + __self_view __sv = __t; + return std::__str_find_first_not_of<value_type, size_type, traits_type, npos> + (data(), size(), __sv.data(), __pos, __sv.size()); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const value_type* __s, + size_type __pos) const _NOEXCEPT +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__s != nullptr, "string::find_first_not_of(): received nullptr"); + return std::__str_find_first_not_of<value_type, size_type, traits_type, npos> + (data(), size(), __s, __pos, traits_type::length(__s)); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(value_type __c, + size_type __pos) const _NOEXCEPT +{ + return std::__str_find_first_not_of<value_type, size_type, traits_type, npos> + (data(), size(), __c, __pos); +} + +// find_last_not_of + +template<class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const value_type* __s, + size_type __pos, + size_type __n) const _NOEXCEPT +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__n == 0 || __s != nullptr, "string::find_last_not_of(): received nullptr"); + return std::__str_find_last_not_of<value_type, size_type, traits_type, npos> + (data(), size(), __s, __pos, __n); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const basic_string& __str, + size_type __pos) const _NOEXCEPT +{ + return std::__str_find_last_not_of<value_type, size_type, traits_type, npos> + (data(), size(), __str.data(), __pos, __str.size()); +} + +template<class _CharT, class _Traits, class _Allocator> +template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > +_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const _Tp& __t, + size_type __pos) const _NOEXCEPT +{ + __self_view __sv = __t; + return std::__str_find_last_not_of<value_type, size_type, traits_type, npos> + (data(), size(), __sv.data(), __pos, __sv.size()); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const value_type* __s, + size_type __pos) const _NOEXCEPT +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__s != nullptr, "string::find_last_not_of(): received nullptr"); + return std::__str_find_last_not_of<value_type, size_type, traits_type, npos> + (data(), size(), __s, __pos, traits_type::length(__s)); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +typename basic_string<_CharT, _Traits, _Allocator>::size_type +basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(value_type __c, + size_type __pos) const _NOEXCEPT +{ + return std::__str_find_last_not_of<value_type, size_type, traits_type, npos> + (data(), size(), __c, __pos); +} + +// compare + +template <class _CharT, class _Traits, class _Allocator> +template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > +_LIBCPP_CONSTEXPR_SINCE_CXX20 int +basic_string<_CharT, _Traits, _Allocator>::compare(const _Tp& __t) const _NOEXCEPT +{ + __self_view __sv = __t; + size_t __lhs_sz = size(); + size_t __rhs_sz = __sv.size(); + int __result = traits_type::compare(data(), __sv.data(), + std::min(__lhs_sz, __rhs_sz)); + if (__result != 0) + return __result; + if (__lhs_sz < __rhs_sz) + return -1; + if (__lhs_sz > __rhs_sz) + return 1; + return 0; +} + +template <class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +int +basic_string<_CharT, _Traits, _Allocator>::compare(const basic_string& __str) const _NOEXCEPT +{ + return compare(__self_view(__str)); +} + +template <class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +int +basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, + size_type __n1, + const value_type* __s, + size_type __n2) const +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__n2 == 0 || __s != nullptr, "string::compare(): received nullptr"); + size_type __sz = size(); + if (__pos1 > __sz || __n2 == npos) + __throw_out_of_range(); + size_type __rlen = std::min(__n1, __sz - __pos1); + int __r = traits_type::compare(data() + __pos1, __s, std::min(__rlen, __n2)); + if (__r == 0) + { + if (__rlen < __n2) + __r = -1; + else if (__rlen > __n2) + __r = 1; + } + return __r; +} + +template <class _CharT, class _Traits, class _Allocator> +template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > +_LIBCPP_CONSTEXPR_SINCE_CXX20 int +basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, + size_type __n1, + const _Tp& __t) const +{ + __self_view __sv = __t; + return compare(__pos1, __n1, __sv.data(), __sv.size()); +} + +template <class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +int +basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, + size_type __n1, + const basic_string& __str) const +{ + return compare(__pos1, __n1, __str.data(), __str.size()); +} + +template <class _CharT, class _Traits, class _Allocator> +template <class _Tp, + __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && + !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, + int> > +_LIBCPP_CONSTEXPR_SINCE_CXX20 int basic_string<_CharT, _Traits, _Allocator>::compare( + size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2) const { + __self_view __sv = __t; + return __self_view(*this).substr(__pos1, __n1).compare(__sv.substr(__pos2, __n2)); +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +int +basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, + size_type __n1, + const basic_string& __str, + size_type __pos2, + size_type __n2) const +{ + return compare(__pos1, __n1, __self_view(__str), __pos2, __n2); +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +int +basic_string<_CharT, _Traits, _Allocator>::compare(const value_type* __s) const _NOEXCEPT +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__s != nullptr, "string::compare(): received nullptr"); + return compare(0, npos, __s, traits_type::length(__s)); +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_CONSTEXPR_SINCE_CXX20 +int +basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, + size_type __n1, + const value_type* __s) const +{ + _LIBCPP_ASSERT_UNCATEGORIZED(__s != nullptr, "string::compare(): received nullptr"); + return compare(__pos1, __n1, __s, traits_type::length(__s)); +} + +// __invariants + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +bool +basic_string<_CharT, _Traits, _Allocator>::__invariants() const +{ + if (size() > capacity()) + return false; + if (capacity() < __min_cap - 1) + return false; + if (data() == nullptr) + return false; + if (!_Traits::eq(data()[size()], value_type())) + return false; + return true; +} + +// __clear_and_shrink + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +void +basic_string<_CharT, _Traits, _Allocator>::__clear_and_shrink() _NOEXCEPT +{ + clear(); + if(__is_long()) + { + __alloc_traits::deallocate(__alloc(), __get_long_pointer(), capacity() + 1); + __default_init(); + } +} + +// operator== + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI +bool +operator==(const basic_string<_CharT, _Traits, _Allocator>& __lhs, + const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT +{ +#if _LIBCPP_STD_VER >= 20 + return basic_string_view<_CharT, _Traits>(__lhs) == basic_string_view<_CharT, _Traits>(__rhs); +#else + size_t __lhs_sz = __lhs.size(); + return __lhs_sz == __rhs.size() && _Traits::compare(__lhs.data(), + __rhs.data(), + __lhs_sz) == 0; +#endif +} + +template<class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI +bool +operator==(const basic_string<char, char_traits<char>, _Allocator>& __lhs, + const basic_string<char, char_traits<char>, _Allocator>& __rhs) _NOEXCEPT +{ + size_t __lhs_sz = __lhs.size(); + if (__lhs_sz != __rhs.size()) + return false; + const char* __lp = __lhs.data(); + const char* __rp = __rhs.data(); + if (__lhs.__is_long()) + return char_traits<char>::compare(__lp, __rp, __lhs_sz) == 0; + for (; __lhs_sz != 0; --__lhs_sz, ++__lp, ++__rp) + if (*__lp != *__rp) + return false; + return true; +} + +#if _LIBCPP_STD_VER <= 17 +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI +bool +operator==(const _CharT* __lhs, + const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT +{ + typedef basic_string<_CharT, _Traits, _Allocator> _String; + _LIBCPP_ASSERT_UNCATEGORIZED(__lhs != nullptr, "operator==(char*, basic_string): received nullptr"); + size_t __lhs_len = _Traits::length(__lhs); + if (__lhs_len != __rhs.size()) return false; + return __rhs.compare(0, _String::npos, __lhs, __lhs_len) == 0; +} +#endif // _LIBCPP_STD_VER <= 17 + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI +bool +operator==(const basic_string<_CharT,_Traits,_Allocator>& __lhs, + const _CharT* __rhs) _NOEXCEPT +{ +#if _LIBCPP_STD_VER >= 20 + return basic_string_view<_CharT, _Traits>(__lhs) == basic_string_view<_CharT, _Traits>(__rhs); +#else + typedef basic_string<_CharT, _Traits, _Allocator> _String; + _LIBCPP_ASSERT_UNCATEGORIZED(__rhs != nullptr, "operator==(basic_string, char*): received nullptr"); + size_t __rhs_len = _Traits::length(__rhs); + if (__rhs_len != __lhs.size()) return false; + return __lhs.compare(0, _String::npos, __rhs, __rhs_len) == 0; +#endif +} + +#if _LIBCPP_STD_VER >= 20 + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_HIDE_FROM_ABI constexpr auto operator<=>( + const basic_string<_CharT, _Traits, _Allocator>& __lhs, + const basic_string<_CharT, _Traits, _Allocator>& __rhs) noexcept { + return basic_string_view<_CharT, _Traits>(__lhs) <=> basic_string_view<_CharT, _Traits>(__rhs); +} + +template <class _CharT, class _Traits, class _Allocator> +_LIBCPP_HIDE_FROM_ABI constexpr auto +operator<=>(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) { + return basic_string_view<_CharT, _Traits>(__lhs) <=> basic_string_view<_CharT, _Traits>(__rhs); +} + +#else // _LIBCPP_STD_VER >= 20 + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI +bool +operator!=(const basic_string<_CharT,_Traits,_Allocator>& __lhs, + const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT +{ + return !(__lhs == __rhs); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI +bool +operator!=(const _CharT* __lhs, + const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT +{ + return !(__lhs == __rhs); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI +bool +operator!=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, + const _CharT* __rhs) _NOEXCEPT +{ + return !(__lhs == __rhs); +} + +// operator< + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI +bool +operator< (const basic_string<_CharT, _Traits, _Allocator>& __lhs, + const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT +{ + return __lhs.compare(__rhs) < 0; +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI +bool +operator< (const basic_string<_CharT, _Traits, _Allocator>& __lhs, + const _CharT* __rhs) _NOEXCEPT +{ + return __lhs.compare(__rhs) < 0; +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI +bool +operator< (const _CharT* __lhs, + const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT +{ + return __rhs.compare(__lhs) > 0; +} + +// operator> + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI +bool +operator> (const basic_string<_CharT, _Traits, _Allocator>& __lhs, + const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT +{ + return __rhs < __lhs; +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI +bool +operator> (const basic_string<_CharT, _Traits, _Allocator>& __lhs, + const _CharT* __rhs) _NOEXCEPT +{ + return __rhs < __lhs; +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI +bool +operator> (const _CharT* __lhs, + const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT +{ + return __rhs < __lhs; +} + +// operator<= + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI +bool +operator<=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, + const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT +{ + return !(__rhs < __lhs); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI +bool +operator<=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, + const _CharT* __rhs) _NOEXCEPT +{ + return !(__rhs < __lhs); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI +bool +operator<=(const _CharT* __lhs, + const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT +{ + return !(__rhs < __lhs); +} + +// operator>= + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI +bool +operator>=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, + const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT +{ + return !(__lhs < __rhs); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI +bool +operator>=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, + const _CharT* __rhs) _NOEXCEPT +{ + return !(__lhs < __rhs); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI +bool +operator>=(const _CharT* __lhs, + const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT +{ + return !(__lhs < __rhs); +} +#endif // _LIBCPP_STD_VER >= 20 + +// operator + + +template<class _CharT, class _Traits, class _Allocator> +_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator> +operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, + const basic_string<_CharT, _Traits, _Allocator>& __rhs) +{ + using _String = basic_string<_CharT, _Traits, _Allocator>; + auto __lhs_sz = __lhs.size(); + auto __rhs_sz = __rhs.size(); + _String __r(__uninitialized_size_tag(), + __lhs_sz + __rhs_sz, + _String::__alloc_traits::select_on_container_copy_construction(__lhs.get_allocator())); + auto __ptr = std::__to_address(__r.__get_pointer()); + _Traits::copy(__ptr, __lhs.data(), __lhs_sz); + _Traits::copy(__ptr + __lhs_sz, __rhs.data(), __rhs_sz); + _Traits::assign(__ptr + __lhs_sz + __rhs_sz, 1, _CharT()); + return __r; +} + +template<class _CharT, class _Traits, class _Allocator> +_LIBCPP_HIDDEN _LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator> +operator+(const _CharT* __lhs , const basic_string<_CharT,_Traits,_Allocator>& __rhs) +{ + using _String = basic_string<_CharT, _Traits, _Allocator>; + auto __lhs_sz = _Traits::length(__lhs); + auto __rhs_sz = __rhs.size(); + _String __r(__uninitialized_size_tag(), + __lhs_sz + __rhs_sz, + _String::__alloc_traits::select_on_container_copy_construction(__rhs.get_allocator())); + auto __ptr = std::__to_address(__r.__get_pointer()); + _Traits::copy(__ptr, __lhs, __lhs_sz); + _Traits::copy(__ptr + __lhs_sz, __rhs.data(), __rhs_sz); + _Traits::assign(__ptr + __lhs_sz + __rhs_sz, 1, _CharT()); + return __r; +} + +template<class _CharT, class _Traits, class _Allocator> +_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator> +operator+(_CharT __lhs, const basic_string<_CharT,_Traits,_Allocator>& __rhs) +{ + using _String = basic_string<_CharT, _Traits, _Allocator>; + typename _String::size_type __rhs_sz = __rhs.size(); + _String __r(__uninitialized_size_tag(), + __rhs_sz + 1, + _String::__alloc_traits::select_on_container_copy_construction(__rhs.get_allocator())); + auto __ptr = std::__to_address(__r.__get_pointer()); + _Traits::assign(__ptr, 1, __lhs); + _Traits::copy(__ptr + 1, __rhs.data(), __rhs_sz); + _Traits::assign(__ptr + 1 + __rhs_sz, 1, _CharT()); + return __r; +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator> +operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) +{ + using _String = basic_string<_CharT, _Traits, _Allocator>; + typename _String::size_type __lhs_sz = __lhs.size(); + typename _String::size_type __rhs_sz = _Traits::length(__rhs); + _String __r(__uninitialized_size_tag(), + __lhs_sz + __rhs_sz, + _String::__alloc_traits::select_on_container_copy_construction(__lhs.get_allocator())); + auto __ptr = std::__to_address(__r.__get_pointer()); + _Traits::copy(__ptr, __lhs.data(), __lhs_sz); + _Traits::copy(__ptr + __lhs_sz, __rhs, __rhs_sz); + _Traits::assign(__ptr + __lhs_sz + __rhs_sz, 1, _CharT()); + return __r; +} + +template<class _CharT, class _Traits, class _Allocator> +_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator> +operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, _CharT __rhs) +{ + using _String = basic_string<_CharT, _Traits, _Allocator>; + typename _String::size_type __lhs_sz = __lhs.size(); + _String __r(__uninitialized_size_tag(), + __lhs_sz + 1, + _String::__alloc_traits::select_on_container_copy_construction(__lhs.get_allocator())); + auto __ptr = std::__to_address(__r.__get_pointer()); + _Traits::copy(__ptr, __lhs.data(), __lhs_sz); + _Traits::assign(__ptr + __lhs_sz, 1, __rhs); + _Traits::assign(__ptr + 1 + __lhs_sz, 1, _CharT()); + return __r; +} + +#ifndef _LIBCPP_CXX03_LANG + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator> +operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) +{ + return std::move(__lhs.append(__rhs)); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator> +operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs) +{ + return std::move(__rhs.insert(0, __lhs)); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator> +operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs) +{ + return std::move(__lhs.append(__rhs)); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator> +operator+(const _CharT* __lhs , basic_string<_CharT,_Traits,_Allocator>&& __rhs) +{ + return std::move(__rhs.insert(0, __lhs)); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator> +operator+(_CharT __lhs, basic_string<_CharT,_Traits,_Allocator>&& __rhs) +{ + __rhs.insert(__rhs.begin(), __lhs); + return std::move(__rhs); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator> +operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, const _CharT* __rhs) +{ + return std::move(__lhs.append(__rhs)); +} + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 +basic_string<_CharT, _Traits, _Allocator> +operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, _CharT __rhs) +{ + __lhs.push_back(__rhs); + return std::move(__lhs); +} + +#endif // _LIBCPP_CXX03_LANG + +// swap + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 +void +swap(basic_string<_CharT, _Traits, _Allocator>& __lhs, + basic_string<_CharT, _Traits, _Allocator>& __rhs) + _NOEXCEPT_(_NOEXCEPT_(__lhs.swap(__rhs))) +{ + __lhs.swap(__rhs); +} + +_LIBCPP_EXPORTED_FROM_ABI int stoi (const string& __str, size_t* __idx = nullptr, int __base = 10); +_LIBCPP_EXPORTED_FROM_ABI long stol (const string& __str, size_t* __idx = nullptr, int __base = 10); +_LIBCPP_EXPORTED_FROM_ABI unsigned long stoul (const string& __str, size_t* __idx = nullptr, int __base = 10); +_LIBCPP_EXPORTED_FROM_ABI long long stoll (const string& __str, size_t* __idx = nullptr, int __base = 10); +_LIBCPP_EXPORTED_FROM_ABI unsigned long long stoull(const string& __str, size_t* __idx = nullptr, int __base = 10); + +_LIBCPP_EXPORTED_FROM_ABI float stof (const string& __str, size_t* __idx = nullptr); +_LIBCPP_EXPORTED_FROM_ABI double stod (const string& __str, size_t* __idx = nullptr); +_LIBCPP_EXPORTED_FROM_ABI long double stold(const string& __str, size_t* __idx = nullptr); + +_LIBCPP_EXPORTED_FROM_ABI string to_string(int __val); +_LIBCPP_EXPORTED_FROM_ABI string to_string(unsigned __val); +_LIBCPP_EXPORTED_FROM_ABI string to_string(long __val); +_LIBCPP_EXPORTED_FROM_ABI string to_string(unsigned long __val); +_LIBCPP_EXPORTED_FROM_ABI string to_string(long long __val); +_LIBCPP_EXPORTED_FROM_ABI string to_string(unsigned long long __val); +_LIBCPP_EXPORTED_FROM_ABI string to_string(float __val); +_LIBCPP_EXPORTED_FROM_ABI string to_string(double __val); +_LIBCPP_EXPORTED_FROM_ABI string to_string(long double __val); + +#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS +_LIBCPP_EXPORTED_FROM_ABI int stoi (const wstring& __str, size_t* __idx = nullptr, int __base = 10); +_LIBCPP_EXPORTED_FROM_ABI long stol (const wstring& __str, size_t* __idx = nullptr, int __base = 10); +_LIBCPP_EXPORTED_FROM_ABI unsigned long stoul (const wstring& __str, size_t* __idx = nullptr, int __base = 10); +_LIBCPP_EXPORTED_FROM_ABI long long stoll (const wstring& __str, size_t* __idx = nullptr, int __base = 10); +_LIBCPP_EXPORTED_FROM_ABI unsigned long long stoull(const wstring& __str, size_t* __idx = nullptr, int __base = 10); + +_LIBCPP_EXPORTED_FROM_ABI float stof (const wstring& __str, size_t* __idx = nullptr); +_LIBCPP_EXPORTED_FROM_ABI double stod (const wstring& __str, size_t* __idx = nullptr); +_LIBCPP_EXPORTED_FROM_ABI long double stold(const wstring& __str, size_t* __idx = nullptr); + +_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(int __val); +_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(unsigned __val); +_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(long __val); +_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(unsigned long __val); +_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(long long __val); +_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(unsigned long long __val); +_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(float __val); +_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(double __val); +_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(long double __val); +#endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS + +template<class _CharT, class _Traits, class _Allocator> +_LIBCPP_TEMPLATE_DATA_VIS +const typename basic_string<_CharT, _Traits, _Allocator>::size_type + basic_string<_CharT, _Traits, _Allocator>::npos; + +template <class _CharT, class _Allocator> +struct __string_hash : public __unary_function<basic_string<_CharT, char_traits<_CharT>, _Allocator>, size_t> { + _LIBCPP_HIDE_FROM_ABI size_t + operator()(const basic_string<_CharT, char_traits<_CharT>, _Allocator>& __val) const _NOEXCEPT { + return std::__do_string_hash(__val.data(), __val.data() + __val.size()); + } +}; + +template <class _Allocator> +struct hash<basic_string<char, char_traits<char>, _Allocator> > : __string_hash<char, _Allocator> {}; + +#ifndef _LIBCPP_HAS_NO_CHAR8_T +template <class _Allocator> +struct hash<basic_string<char8_t, char_traits<char8_t>, _Allocator> > : __string_hash<char8_t, _Allocator> {}; +#endif + +template <class _Allocator> +struct hash<basic_string<char16_t, char_traits<char16_t>, _Allocator> > : __string_hash<char16_t, _Allocator> {}; + +template <class _Allocator> +struct hash<basic_string<char32_t, char_traits<char32_t>, _Allocator> > : __string_hash<char32_t, _Allocator> {}; + +#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS +template <class _Allocator> +struct hash<basic_string<wchar_t, char_traits<wchar_t>, _Allocator> > : __string_hash<wchar_t, _Allocator> {}; +#endif + +template<class _CharT, class _Traits, class _Allocator> +_LIBCPP_HIDE_FROM_ABI basic_ostream<_CharT, _Traits>& +operator<<(basic_ostream<_CharT, _Traits>& __os, + const basic_string<_CharT, _Traits, _Allocator>& __str); + +template<class _CharT, class _Traits, class _Allocator> +_LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>& +operator>>(basic_istream<_CharT, _Traits>& __is, + basic_string<_CharT, _Traits, _Allocator>& __str); + +template<class _CharT, class _Traits, class _Allocator> +_LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>& +getline(basic_istream<_CharT, _Traits>& __is, + basic_string<_CharT, _Traits, _Allocator>& __str, _CharT __dlm); + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI +basic_istream<_CharT, _Traits>& +getline(basic_istream<_CharT, _Traits>& __is, + basic_string<_CharT, _Traits, _Allocator>& __str); + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI +basic_istream<_CharT, _Traits>& +getline(basic_istream<_CharT, _Traits>&& __is, + basic_string<_CharT, _Traits, _Allocator>& __str, _CharT __dlm); + +template<class _CharT, class _Traits, class _Allocator> +inline _LIBCPP_HIDE_FROM_ABI +basic_istream<_CharT, _Traits>& +getline(basic_istream<_CharT, _Traits>&& __is, + basic_string<_CharT, _Traits, _Allocator>& __str); + +#if _LIBCPP_STD_VER >= 20 +template <class _CharT, class _Traits, class _Allocator, class _Up> +inline _LIBCPP_HIDE_FROM_ABI + typename basic_string<_CharT, _Traits, _Allocator>::size_type + erase(basic_string<_CharT, _Traits, _Allocator>& __str, const _Up& __v) { + auto __old_size = __str.size(); + __str.erase(std::remove(__str.begin(), __str.end(), __v), __str.end()); + return __old_size - __str.size(); +} + +template <class _CharT, class _Traits, class _Allocator, class _Predicate> +inline _LIBCPP_HIDE_FROM_ABI + typename basic_string<_CharT, _Traits, _Allocator>::size_type + erase_if(basic_string<_CharT, _Traits, _Allocator>& __str, + _Predicate __pred) { + auto __old_size = __str.size(); + __str.erase(std::remove_if(__str.begin(), __str.end(), __pred), + __str.end()); + return __old_size - __str.size(); +} +#endif + +#if _LIBCPP_STD_VER >= 14 +// Literal suffixes for basic_string [basic.string.literals] +inline namespace literals +{ + inline namespace string_literals + { + inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string<char> operator""s( const char *__str, size_t __len ) + { + return basic_string<char> (__str, __len); + } + +#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS + inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string<wchar_t> operator""s( const wchar_t *__str, size_t __len ) + { + return basic_string<wchar_t> (__str, __len); + } +#endif + +#ifndef _LIBCPP_HAS_NO_CHAR8_T + inline _LIBCPP_HIDE_FROM_ABI constexpr + basic_string<char8_t> operator""s(const char8_t *__str, size_t __len) + { + return basic_string<char8_t> (__str, __len); + } +#endif + + inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string<char16_t> operator""s( const char16_t *__str, size_t __len ) + { + return basic_string<char16_t> (__str, __len); + } + + inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 + basic_string<char32_t> operator""s( const char32_t *__str, size_t __len ) + { + return basic_string<char32_t> (__str, __len); + } + } // namespace string_literals +} // namespace literals + +#if _LIBCPP_STD_VER >= 20 +template <> +inline constexpr bool __format::__enable_insertable<std::basic_string<char>> = true; +#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS +template <> +inline constexpr bool __format::__enable_insertable<std::basic_string<wchar_t>> = true; +#endif +#endif + +#endif + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 +# include <algorithm> +# include <concepts> +# include <cstdlib> +# include <iterator> +# include <new> +# include <type_traits> +# include <typeinfo> +# include <utility> +#endif + +#endif // _LIBCPP_STRING |