| Defined in header <iterator> | ||||
|---|---|---|---|---|
| (1) | (since C++14) | ||
| (1) | (since C++14) | ||
| (2) | (since C++14) | ||
| (3) | (since C++14) |
Returns an iterator to the reverse-end of the given container c or array array.
1) Returns a possibly const-qualified iterator to the reverse-end of the container
c. 3) Returns a const-qualified iterator to the reverse-end of the container
c.Parameters
| c | - | a container with a rend method |
| array | - | an array of arbitrary type |
Return value
An iterator to the reverse-end of c or array.
Notes
In addition to being included in <iterator>, std::rend is guaranteed to become available if any of the following headers are included: <array>, <deque>, <forward_list>, <list>, <map>, <regex>, <set>, <string>, <unordered_map>, <unordered_set>, and <vector>.
Specializations
Custom specializations of std::rend may be provided for classes that do not expose a suitable rend() member function, yet can be iterated. The following specializations are already provided by the standard library:
| (C++14) | specializes std::rend (function) |
Example
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | #include <iostream>#include <vector>#include <iterator>#include <algorithm> int main(){ int a[] = {4, 6, -3, 9, 10}; std::cout << "Array backwards: "; std::copy(std::rbegin(a), std::rend(a), std::ostream_iterator<int>(std::cout, " ")); std::cout << "\nVector backwards: "; std::vector<int> v = {4, 6, -3, 9, 10}; std::copy(std::rbegin(v), std::rend(v), std::ostream_iterator<int>(std::cout, " "));} |
Output:
1 2 | Array backwards: 10 9 -3 6 4 Vector backwards: 10 9 -3 6 4 |
See also
| (C++11)(C++14) | returns an iterator to the end of a container or array (function) |
| (C++14) | returns a reverse iterator to a container or array (function) |
| (C++11)(C++14) | returns an iterator to the beginning of a container or array (function) |
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