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Showing content from https://timsong-cpp.github.io/cppwp/n4659/iterator.range below:

[iterator.range]

27 Iterators library [iterators] 27.7 Range access [iterator.range]

In addition to being available via inclusion of the <iterator> header, the function templates in [iterator.range] are available when any of the following headers are included: <array>, <deque>, <forward_­list>, <list>, <map>, <regex>, <set>, <string>, <string_­view>, <unordered_­map>, <unordered_­set>, and <vector>.

template <class C> constexpr auto begin(C& c) -> decltype(c.begin()); template <class C> constexpr auto begin(const C& c) -> decltype(c.begin());

template <class C> constexpr auto end(C& c) -> decltype(c.end()); template <class C> constexpr auto end(const C& c) -> decltype(c.end());

template <class T, size_t N> constexpr T* begin(T (&array)[N]) noexcept;

template <class T, size_t N> constexpr T* end(T (&array)[N]) noexcept;

template <class C> constexpr auto cbegin(const C& c) noexcept(noexcept(std::begin(c))) -> decltype(std::begin(c));

template <class C> constexpr auto cend(const C& c) noexcept(noexcept(std::end(c))) -> decltype(std::end(c));

template <class C> constexpr auto rbegin(C& c) -> decltype(c.rbegin()); template <class C> constexpr auto rbegin(const C& c) -> decltype(c.rbegin());

template <class C> constexpr auto rend(C& c) -> decltype(c.rend()); template <class C> constexpr auto rend(const C& c) -> decltype(c.rend());

template <class T, size_t N> constexpr reverse_iterator<T*> rbegin(T (&array)[N]);

Returns: reverse_­iterator<T*>(array + N).

template <class T, size_t N> constexpr reverse_iterator<T*> rend(T (&array)[N]);

Returns: reverse_­iterator<T*>(array).

template <class E> constexpr reverse_iterator<const E*> rbegin(initializer_list<E> il);

Returns: reverse_­iterator<const E*>(il.end()).

template <class E> constexpr reverse_iterator<const E*> rend(initializer_list<E> il);

Returns: reverse_­iterator<const E*>(il.begin()).

template <class C> constexpr auto crbegin(const C& c) -> decltype(std::rbegin(c));

template <class C> constexpr auto crend(const C& c) -> decltype(std::rend(c));


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