// -*- 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

// clang-format off

/*

    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, removed in C++26

    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

*/

// clang-format on

#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 <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>

#if !defined(_LIBCPP_HAS_NO_ASAN) && defined(_LIBCPP_INSTRUMENTED_WITH_ASAN)

#  define _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS __attribute__((__no_sanitize__("address")))

// This macro disables AddressSanitizer (ASan) instrumentation for a specific function,

// allowing memory accesses that would normally trigger ASan errors to proceed without crashing.

// This is useful for accessing parts of objects memory, which should not be accessed,

// such as unused bytes in short strings, that should never be accessed

// by other parts of the program.

#else

#  define _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS

#endif

#define _LIBCPP_SHORT_STRING_ANNOTATIONS_ALLOWED false

_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 {

private:

  using __default_allocator_type = allocator<_CharT>;

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");

  // TODO: Implement iterator bounds checking without requiring the global database.

  typedef __wrap_iter<pointer> iterator;

  typedef __wrap_iter<const_pointer> const_iterator;

  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 {

      __short __s;

      __long __l;

      __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);

    }

    __annotate_new(__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); }

std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::__make_iterator[abi:ne180100](char*)

Line

Count

Source

871

98

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator __make_iterator(pointer __p) { return iterator(__p); }

Unexecuted instantiation: std::__1::basic_string<wchar_t, std::__1::char_traits<wchar_t>, std::__1::allocator<wchar_t> >::__make_iterator[abi:ne180100](wchar_t*)

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_iterator __make_const_iterator(const_pointer __p) const {

    return const_iterator(__p);

  }

Unexecuted instantiation: std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::__make_const_iterator[abi:ne180100](char const*) const

Unexecuted instantiation: std::__1::basic_string<wchar_t, std::__1::char_traits<wchar_t>, std::__1::allocator<wchar_t> >::__make_const_iterator[abi:ne180100](wchar_t const*) const

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_(__value_init_tag(), __default_init_tag()) {

    __annotate_new(0);

  }

std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::basic_string[abi:ne180100]()

Line

Count

Source

882

1.71M

      : __r_(__value_init_tag(), __default_init_tag()) {

883

1.71M

    __annotate_new(0);

884

1.71M

  }

Unexecuted instantiation: std::__1::basic_string<wchar_t, std::__1::char_traits<wchar_t>, std::__1::allocator<wchar_t> >::basic_string[abi:ne180100]()

  _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_(__value_init_tag(), __a) {

    __annotate_new(0);

  }

  _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS 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();

      __annotate_new(__get_short_size());

    } else

      __init_copy_ctor_external(std::__to_address(__str.__get_long_pointer()), __str.__get_long_size());

  }

std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::basic_string(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)

Line

Count

Source

897

430k

      : __r_(__default_init_tag(), __alloc_traits::select_on_container_copy_construction(__str.__alloc())) {

898

430k

    if (!__str.__is_long()) {

899

8.32k

      __r_.first() = __str.__r_.first();

900

8.32k

      __annotate_new(__get_short_size());

901

8.32k

    } else

902

422k

      __init_copy_ctor_external(std::__to_address(__str.__get_long_pointer()), __str.__get_long_size());

903

430k

  }

Unexecuted instantiation: std::__1::basic_string<wchar_t, std::__1::char_traits<wchar_t>, std::__1::allocator<wchar_t> >::basic_string(std::__1::basic_string<wchar_t, std::__1::char_traits<wchar_t>, std::__1::allocator<wchar_t> > const&)

  _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS

  basic_string(const basic_string& __str, const allocator_type& __a)

      : __r_(__default_init_tag(), __a) {

    if (!__str.__is_long()) {

      __r_.first() = __str.__r_.first();

      __annotate_new(__get_short_size());

    } else

      __init_copy_ctor_external(std::__to_address(__str.__get_long_pointer()), __str.__get_long_size());

  }

Unexecuted instantiation: std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::basic_string(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::allocator<char> const&)

Unexecuted instantiation: std::__1::basic_string<wchar_t, std::__1::char_traits<wchar_t>, std::__1::allocator<wchar_t> >::basic_string(std::__1::basic_string<wchar_t, std::__1::char_traits<wchar_t>, std::__1::allocator<wchar_t> > const&, std::__1::allocator<wchar_t> const&)

#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

      // Turning off ASan instrumentation for variable initialization with _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS

      // does not work consistently during initialization of __r_, so we instead unpoison __str's memory manually first.

      // __str's memory needs to be unpoisoned only in the case where it's a short string.

      : __r_([](basic_string &__s) -> decltype(__s.__r_)&& { if(!__s.__is_long()) __s.__annotate_delete(); return std::move(__s.__r_); }(__str)) {

std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::basic_string[abi:ne180100](std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&&)::{lambda(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&)#1}::operator()(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&) const

Line

Count

Source

925

698k

      : __r_([](basic_string &__s) -> decltype(__s.__r_)&& { if(!__s.__is_long()) __s.__annotate_delete(); return std::move(__s.__r_); }(__str)) {

Unexecuted instantiation: std::__1::basic_string<wchar_t, std::__1::char_traits<wchar_t>, std::__1::allocator<wchar_t> >::basic_string[abi:ne180100](std::__1::basic_string<wchar_t, std::__1::char_traits<wchar_t>, std::__1::allocator<wchar_t> >&&)::{lambda(std::__1::basic_string<wchar_t, std::__1::char_traits<wchar_t>, std::__1::allocator<wchar_t> >&)#1}::operator()(std::__1::basic_string<wchar_t, std::__1::char_traits<wchar_t>, std::__1::allocator<wchar_t> >&) const

    __str.__r_.first() = __rep();

    __str.__annotate_new(0);

    if (!__is_long())

      __annotate_new(size());

  }

std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::basic_string[abi:ne180100](std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&&)

Line

Count

Source

925

698k

      : __r_([](basic_string &__s) -> decltype(__s.__r_)&& { if(!__s.__is_long()) __s.__annotate_delete(); return std::move(__s.__r_); }(__str)) {

926

698k

    __str.__r_.first() = __rep();

927

698k

    __str.__annotate_new(0);

928

698k

    if (!__is_long())

929

130k

      __annotate_new(size());

930

698k

  }

Unexecuted instantiation: std::__1::basic_string<wchar_t, std::__1::char_traits<wchar_t>, std::__1::allocator<wchar_t> >::basic_string[abi:ne180100](std::__1::basic_string<wchar_t, std::__1::char_traits<wchar_t>, std::__1::allocator<wchar_t> >&&)

  _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();

      if (!__str.__is_long())

        __str.__annotate_delete();

      __r_.first()       = __str.__r_.first();

      __str.__r_.first() = __rep();

      __str.__annotate_new(0);

      if (!__is_long() && this != &__str)

        __annotate_new(size());

    }

  }

#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_NON_NULL(__s != nullptr, "basic_string(const char*) detected nullptr");

    __init(__s, traits_type::length(__s));

  }

_ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEC2B8ne180100ILi0EEEPKc

Line

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Source

952

1.16M

      : __r_(__default_init_tag(), __default_init_tag()) {

953

1.16M

    _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "basic_string(const char*) detected nullptr");

954

1.16M

    __init(__s, traits_type::length(__s));

955

1.16M

  }

Unexecuted instantiation: _ZNSt3__112basic_stringIwNS_11char_traitsIwEENS_9allocatorIwEEEC2B8ne180100ILi0EEEPKw

  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_NON_NULL(__s != nullptr, "basic_string(const char*, allocator) detected nullptr");

    __init(__s, traits_type::length(__s));

  }

#if _LIBCPP_STD_VER >= 23

  basic_string(nullptr_t) = delete;

#endif

  _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_NON_NULL(__n == 0 || __s != nullptr, "basic_string(const char*, n) detected nullptr");

    __init(__s, __n);

  }

  _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_NON_NULL(__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);

  }

Unexecuted instantiation: std::__1::basic_string<wchar_t, std::__1::char_traits<wchar_t>, std::__1::allocator<wchar_t> >::basic_string[abi:ne180100](unsigned long, wchar_t)

Unexecuted instantiation: std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::basic_string[abi:ne180100](unsigned long, char)

#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()) {

      __move_assign(std::move(__str), __pos, __len);

    } 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));

  }

Unexecuted instantiation: std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::basic_string(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, unsigned long, unsigned long, std::__1::allocator<char> const&)

Unexecuted instantiation: std::__1::basic_string<wchar_t, std::__1::char_traits<wchar_t>, std::__1::allocator<wchar_t> >::basic_string(std::__1::basic_string<wchar_t, std::__1::char_traits<wchar_t>, std::__1::allocator<wchar_t> > const&, unsigned long, unsigned long, std::__1::allocator<wchar_t> const&)

  _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);

  }

Unexecuted instantiation: _ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEC2B8ne180100IPcTnNS_9enable_ifIXsr29__has_input_iterator_categoryIT_EE5valueEiE4typeELi0EEES9_S9_

Unexecuted instantiation: _ZNSt3__112basic_stringIwNS_11char_traitsIwEENS_9allocatorIwEEEC2B8ne180100IPcTnNS_9enable_ifIXsr29__has_input_iterator_categoryIT_EE5valueEiE4typeELi0EEES9_S9_

_ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEC2B8ne180100IPKcTnNS_9enable_ifIXsr29__has_input_iterator_categoryIT_EE5valueEiE4typeELi0EEESA_SA_

Line

Count

Source

1066

1.16M

      : __r_(__default_init_tag(), __default_init_tag()) {

1067

1.16M

    __init(__first, __last);

1068

1.16M

  }

Unexecuted instantiation: _ZNSt3__112basic_stringIwNS_11char_traitsIwEENS_9allocatorIwEEEC2B8ne180100IPKwTnNS_9enable_ifIXsr29__has_input_iterator_categoryIT_EE5valueEiE4typeELi0EEESA_SA_

  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);

  }

Unexecuted instantiation: _ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEC2B8ne180100IPcTnNS_9enable_ifIXsr29__has_input_iterator_categoryIT_EE5valueEiE4typeELi0EEES9_S9_RKS4_

Unexecuted instantiation: _ZNSt3__112basic_stringIwNS_11char_traitsIwEENS_9allocatorIwEEEC2B8ne180100IPwTnNS_9enable_ifIXsr29__has_input_iterator_categoryIT_EE5valueEiE4typeELi0EEES9_S9_RKS4_