std::array<T,N>::rbegin, std::array<T,N>::crbegin

 

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std::array

Member types
Member functions
Element access array::at array::operator[]    array::front array::back array::data Operations array::fill array::swap	Iterators array::beginarray::cbegin array::endarray::cend array::rbeginarray::crbegin    array::rendarray::crend	Capacity array::empty array::size array::max_size
Non-member functions
operator==operator<=> (C++20) get(std::array) swap(std::array) to_array (C++20)	operator|=operator<operator>operator<=operator>= (until C++20)(until C++20)(until C++20)(until C++20)(until C++20)
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tuple_size<std::array>
tuple_element<std::array>
Deduction guides (C++17)

 

reverse_iterator rbegin() noexcept;	(1)	(since C++11) (constexpr since C++17)
const_reverse_iterator rbegin() const noexcept;	(2)	(since C++11) (constexpr since C++17)
const_reverse_iterator crbegin() const noexcept;	(3)	(since C++11) (constexpr since C++17)

Returns a reverse iterator to the first element of the reversed *this. It corresponds to the last element of the non-reversed *this.

If *this is empty, the returned iterator is equal to rend().

Return value

Reverse iterator to the first element.

Complexity

Constant.

Notes

The underlying iterator of the returned reverse iterator is the end iterator. Hence the returned iterator is invalidated if and when the end iterator is invalidated.

Example

Run this code

#include <algorithm>
#include <array>
#include <iostream>
#include <string>
#include <string_view>
 
void print(const std::string_view s) { std::cout << s << ' '; }
 
int main()
{
    const std::array<std::string_view, 8> data
    {
        "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█"
    };
    std::array<std::string, 8> arr;
 
    std::copy(data.cbegin(), data.cend(), arr.begin());
 
    print("Print “arr” in direct order using [cbegin, cend):\t");
    std::for_each(arr.cbegin(), arr.cend(), print);
 
    print("\n\nPrint “arr” in reverse order using [crbegin, crend):\t");
    std::for_each(arr.crbegin(), arr.crend(), print);
}

Output:

Print “arr” in direct order using [cbegin, cend):	 ▁ ▂ ▃ ▄ ▅ ▆ ▇ █ 
 
Print “arr” in reverse order using [crbegin, crend):	 █ ▇ ▆ ▅ ▄ ▃ ▂ ▁

See also

rendcrend	returns a reverse iterator to the end (public member function)
rbegincrbegin (C++14)	returns a reverse iterator to the beginning of a container or array (function template)