Standard library header
From Get docs
Cpp/docs/latest/header/array
Standard library header
This header is part of the containers library.
Includes |
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<initializer_list> (C++11)
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Classes |
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(C++11) |
static contiguous array (class template) |
obtains the size of an array (class template specialization) | |
obtains the type of the elements of array (class template specialization) | |
Functions |
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lexicographically compares the values in the array (function template) | |
accesses an element of an array (function template) | |
(C++11) |
specializes the std::swap algorithm(function template) |
Synopsis
#include <initializer_list>
namespace std {
template <class T, size_t N> struct array;
template <class T, size_t N>
constexpr bool operator==(const array<T,N>& x, const array<T,N>& y);
template <class T, size_t N>
constexpr bool operator!=(const array<T,N>& x, const array<T,N>& y);
template <class T, size_t N>
constexpr bool operator<(const array<T,N>& x, const array<T,N>& y);
template <class T, size_t N>
constexpr bool operator>(const array<T,N>& x, const array<T,N>& y);
template <class T, size_t N>
constexpr bool operator<=(const array<T,N>& x, const array<T,N>& y);
template <class T, size_t N>
constexpr bool operator>=(const array<T,N>& x, const array<T,N>& y);
template <class T, size_t N>
constexpr void swap(array<T,N>& x, array<T,N>& y) noexcept(noexcept(x.swap(y)));
template <class T> class tuple_size;
template <size_t I, class T> class tuple_element;
template <class T, size_t N> struct tuple_size<array<T, N> >;
template <size_t I, class T, size_t N> struct tuple_element<I, array<T, N> >;
template <size_t I, class T, size_t N>
constexpr T& get(array<T, N>&) noexcept;
template <size_t I, class T, size_t N>
constexpr T&& get(array<T, N>&&) noexcept;
template <size_t I, class T, size_t N>
constexpr const T& get(const array<T, N>&) noexcept;
template <size_t I, class T, size_t N>
constexpr const T&& get(const array<T, N>&&) noexcept;
}
Class std::array
template <class T, size_t N >
struct array {
// types:
typedef T& reference;
typedef const T& const_reference;
typedef /*implementation-defined*/ iterator;
typedef /*implementation-defined*/ const_iterator;
typedef size_t size_type;
typedef ptrdiff_t difference_type;
typedef T value_type;
typedef T* pointer;
typedef const T* const_pointer;
typedef reverse_iterator<iterator> reverse_iterator;
typedef reverse_iterator<const_iterator> const_reverse_iterator;
T elems[N]; // exposition only
// no explicit construct/copy/destroy for aggregate type
constexpr void fill(const T& u);
constexpr void swap(array<T, N>&) noexcept(is_nothrow_swappable_v<T>);
// 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;
// capacity:
constexpr size_type size() const noexcept;
constexpr size_type max_size() const noexcept;
constexpr bool empty() const noexcept;
// element access:
constexpr reference operator[](size_type n);
constexpr const_reference operator[](size_type n) const;
constexpr const_reference at(size_type n) const;
constexpr reference at(size_type n);
constexpr reference front();
constexpr const_reference front() const;
constexpr reference back();
constexpr const_reference back() const;
constexpr T * data() noexcept;
constexpr const T * data() const noexcept;
};
template<class T, class... U>
array(T, U...) -> array<T, 1 + sizeof...(U)>;
Note
The name array::elems
is only for exposition, it's not part of the interface.
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