Standard library header <array>
From cppreference.com
This header is part of the containers library.
Includes | |
<initializer_list>(C++11) | |
Classes | |
(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 | |
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.