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basic_json::rend

reverse_iterator rend() noexcept;
const_reverse_iterator rend() const noexcept;

Returns an iterator to the reverse-end; that is, one before the first element. This element acts as a placeholder, attempting to access it results in undefined behavior.

Illustration from cppreference.com

Return value

reverse iterator to the element following the last element

Exception safety

No-throw guarantee: this member function never throws exceptions.

Complexity

Constant.

Example

Example

The following code shows an example for eend().

#include <iostream>
#include <nlohmann/json.hpp>

using json = nlohmann::json;

int main()
{
    // create an array value
    json array = {1, 2, 3, 4, 5};

    // get an iterator to the reverse-end
    json::reverse_iterator it = array.rend();

    // increment the iterator to point to the first element
    --it;

    // serialize the element that the iterator points to
    std::cout << *it << '\n';
}

Output:

1

Version history

  • Added in version 1.0.0.