Standard library header <inplace_vector> (C++26)

 

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Standard library headers

Language support <cfloat> <climits> <compare> (C++20) <coroutine> (C++20) <csetjmp> <csignal> <cstdarg> <cstddef> <cstdint> (C++11) <cstdlib> <exception> <initializer_list> (C++11)    <limits> <new> <source_location> (C++20) <stdfloat> (C++23) <typeinfo> <version> (C++20) Concepts <concepts> (C++20) Diagnostics <cassert> <cerrno> <debugging> (C++26) <stacktrace> (C++23) <stdexcept> <system_error> (C++11) Memory management <memory> <memory_resource> (C++17) <scoped_allocator> (C++11) Metaprogramming <type_traits> (C++11) <ratio> (C++11)

General utilities <any> (C++17) <bitset> <bit> (C++20) <charconv> (C++17) <expected> (C++23) <format> (C++20) <functional> <optional> (C++17) <tuple> (C++11) <typeindex> (C++11) <utility> <variant> (C++17) Containers <array> (C++11) <deque> <flat_map> (C++23) <flat_set> (C++23) <forward_list> (C++11) <inplace_vector> (C++26)    <list> <map> <mdspan> (C++23) <queue> <set> <span> (C++20) <stack> <unordered_map> (C++11) <unordered_set> (C++11) <vector> Iterators <iterator> Ranges <generator> (C++23) <ranges> (C++20)

Algorithms <algorithm> <numeric> Strings <cctype> <cstring> <cuchar> (C++11) <cwchar> <cwctype> <string_view> (C++17) <string> Text processing <clocale> <codecvt> (C++11/17/26*) <locale> <regex> (C++11) <text_encoding> (C++26)    Numerics <cfenv> (C++11) <cmath> <complex> <linalg> (C++26) <numbers> (C++20) <random> (C++11) <valarray> Time <chrono> (C++11) <ctime> C compatibility <ccomplex> (C++11/17/20*) <ciso646> (until C++20) <cstdalign> (C++11/17/20*) <cstdbool> (C++11/17/20*) <ctgmath> (C++11/17/20*)

Input/output <cinttypes> (C++11) <cstdio> <filesystem> (C++17) <fstream> <iomanip> <iosfwd> <iostream> <ios> <istream> <ostream> <print> (C++23) <spanstream> (C++23) <sstream> <streambuf> <strstream> (C++98/26*) <syncstream> (C++20) Concurrency support <atomic> (C++11) <barrier> (C++20) <condition_variable> (C++11) <future> (C++11) <hazard_pointer> (C++26) <latch> (C++20) <mutex> (C++11) <rcu> (C++26) <semaphore> (C++20) <shared_mutex> (C++14) <stdatomic.h> (C++23) <stop_token> (C++20) <thread> (C++11) Execution support <execution> (C++17)

 

This header is part of the containers library.

Includes
<compare> (C++20)	Three-way comparison operator support
<initializer_list> (C++11)	std::initializer_list class template
Classes
inplace_vector (C++26)	dynamically-resizable, fixed capacity, inplace contiguous array (class template)
Functions
erase(std::inplace_vector)erase_if(std::inplace_vector) (C++26)	erases all elements satisfying specific criteria (function template)

Synopsis

// mostly freestanding
#include <compare>
#include <initializer_list>
 
namespace std {
  // class template inplace_vector
  template<class T, size_t N>
  class inplace_vector; // partially freestanding
 
  // erasure
  template<class T, size_t N, class U = T>
  constexpr typename inplace_vector<T, N>::size_type erase(inplace_vector<T, N>& c,
                                                           const U& value);
  template<class T, size_t N, class Predicate>
  constexpr typename inplace_vector<T, N>::size_type erase_if(inplace_vector<T, N>& c,
                                                              Predicate pred);
}

Class template std::inplace_vector

namespace std {
  template<class T, size_t N>
  class inplace_vector
  {
  public:
    // types:
    using value_type             = T;
    using pointer                = T*;
    using const_pointer          = const T*;
    using reference              = value_type&;
    using const_reference        = const value_type&;
    using size_type              = size_t;
    using difference_type        = ptrdiff_t;
    using iterator               = /* implementation-defined */;
    using const_iterator         = /* implementation-defined */;
    using reverse_iterator       = std::reverse_iterator<iterator>;
    using const_reverse_iterator = std::reverse_iterator<const_iterator>;
 
    // construct/copy/destroy
    constexpr inplace_vector() noexcept;
    constexpr explicit inplace_vector(size_type n);        // freestanding-deleted
    constexpr inplace_vector(size_type n, const T& value); // freestanding-deleted
    template<class InputIter>
    constexpr inplace_vector(InputIter first, InputIter last); // freestanding-deleted
    template<container-compatible-range<T> R>
    constexpr inplace_vector(from_range_t, R&& rg); // freestanding-deleted
    constexpr inplace_vector(const inplace_vector&);
    constexpr inplace_vector(inplace_vector&&) noexcept(
      N == 0 || is_nothrow_move_constructible_v<T>);
    constexpr inplace_vector(initializer_list<T> il); // freestanding-deleted
    constexpr ~inplace_vector();
    constexpr inplace_vector& operator=(const inplace_vector& other);
    constexpr inplace_vector& operator=(inplace_vector&& other) noexcept(
      N == 0 || (is_nothrow_move_assignable_v<T> && is_nothrow_move_constructible_v<T>));
    constexpr inplace_vector& operator=(initializer_list<T>); // freestanding-deleted
    template<class InputIter>
    constexpr void assign(InputIter first, InputIter last); // freestanding-deleted
    template<container-compatible-range<T> R>
    constexpr void assign_range(R&& rg);            // freestanding-deleted
    constexpr void assign(size_type n, const T& u); // freestanding-deleted
    constexpr void assign(initializer_list<T> il);  // freestanding-deleted
 
    // iterators
    constexpr iterator begin() noexcept;
    constexpr const_iterator begin() const noexcept;
    constexpr iterator end() noexcept;
    constexpr const_iterator end() const noexcept;
    constexpr reverse_iterator rbegin() noexcept;
    constexpr const_reverse_iterator rbegin() const noexcept;
    constexpr reverse_iterator rend() noexcept;
    constexpr const_reverse_iterator rend() const noexcept;
 
    constexpr const_iterator cbegin() const noexcept;
    constexpr const_iterator cend() const noexcept;
    constexpr const_reverse_iterator crbegin() const noexcept;
    constexpr const_reverse_iterator crend() const noexcept;
 
    // size/capacity
    constexpr bool empty() const noexcept;
    constexpr size_type size() const noexcept;
    static constexpr size_type max_size() noexcept;
    static constexpr size_type capacity() noexcept;
    constexpr void resize(size_type sz);             // freestanding-deleted
    constexpr void resize(size_type sz, const T& c); // freestanding-deleted
    static constexpr void reserve(size_type n);      // freestanding-deleted
    static constexpr void shrink_to_fit() noexcept;
 
    // element access
    constexpr reference operator[](size_type n);
    constexpr const_reference operator[](size_type n) const;
    constexpr reference at(size_type n);             // freestanding-deleted
    constexpr const_reference at(size_type n) const; // freestanding-deleted
    constexpr reference front();
    constexpr const_reference front() const;
    constexpr reference back();
    constexpr const_reference back() const;
 
    // data access
    constexpr T* data() noexcept;
    constexpr const T* data() const noexcept;
 
    // modifiers
    template<class... Args>
    constexpr reference emplace_back(Args&&... args); // freestanding-deleted
    constexpr reference push_back(const T& x);        // freestanding-deleted
    constexpr reference push_back(T&& x);             // freestanding-deleted
    template<container-compatible-range<T> R>
    constexpr void append_range(R&& rg); // freestanding-deleted
    constexpr void pop_back();
 
    template<class... Args>
    constexpr pointer try_emplace_back(Args&&... args);
    constexpr pointer try_push_back(const T& x);
    constexpr pointer try_push_back(T&& x);
    template<container-compatible-range<T> R>
    constexpr ranges::borrowed_iterator_t<R> try_append_range(R&& rg);
 
    template<class... Args>
    constexpr reference unchecked_emplace_back(Args&&... args);
    constexpr reference unchecked_push_back(const T& x);
    constexpr reference unchecked_push_back(T&& x);
 
    template<class... Args>
    constexpr iterator emplace(const_iterator position,
                               Args&&... args); // freestanding-deleted
    constexpr iterator insert(const_iterator position,
                              const T& x);                     // freestanding-deleted
    constexpr iterator insert(const_iterator position, T&& x); // freestanding-deleted
    constexpr iterator insert(const_iterator position,
                              size_type n, // freestanding-deleted
                              const T& x);
    template<class InputIter>
    constexpr iterator insert(const_iterator position, // freestanding-deleted
                              InputIter first,
                              InputIter last);
    template<container-compatible-range<T> R>
    constexpr iterator insert_range(const_iterator position,
                                    R&& rg);           // freestanding-deleted
    constexpr iterator insert(const_iterator position, // freestanding-deleted
                              initializer_list<T> il);
    constexpr iterator erase(const_iterator position);
    constexpr iterator erase(const_iterator first, const_iterator last);
    constexpr void swap(inplace_vector& x) noexcept(N == 0 ||
                                                    (is_nothrow_swappable_v<T> &&
                                                     is_nothrow_move_constructible_v<T>));
    constexpr void clear() noexcept;
 
    constexpr friend bool operator==(const inplace_vector& x, const inplace_vector& y);
    constexpr friend /*synth-three-way-result*/<T> operator<=>(const inplace_vector& x,
                                                               const inplace_vector& y);
    constexpr friend void swap(inplace_vector& x, inplace_vector& y) noexcept(
      N == 0 || (is_nothrow_swappable_v<T> && is_nothrow_move_constructible_v<T>))
    {
      x.swap(y);
    }
  };
}