public member function
<vector>
reverse_iterator rend();
const_reverse_iterator rend() const;
reverse_iterator rend() noexcept;
const_reverse_iterator rend() const noexcept;
Return reverse iterator to reverse end
Returns a reverse iterator pointing to the theoretical element preceding the first element in the vector (which is considered its reverse end).
The range between vector::rbegin and vector::rend contains all the elements of the vector (in reverse order).
Return Value
A reverse iterator to the reverse end of the sequence container.
If the vector object is const-qualified, the function returns a const_reverse_iterator. Otherwise, it returns a reverse_iterator.
Member types reverse_iterator and const_reverse_iterator are reverse random access iterator types (pointing to an element and to a const element, respectively). See vector member types.
Example
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
|
// vector::rbegin/rend
#include <iostream>
#include <vector>
int main ()
{
std::vector<int> myvector (5); // 5 default-constructed ints
std::vector<int>::reverse_iterator rit = myvector.rbegin();
int i=0;
for (rit = myvector.rbegin(); rit!= myvector.rend(); ++rit)
*rit = ++i;
std::cout << "myvector contains:";
for (std::vector<int>::iterator it = myvector.begin(); it != myvector.end(); ++it)
std::cout << ' ' << *it;
std::cout << '\n';
return 0;
}
| |
Output:
Iterator validity
No changes.
Data races
The container is accessed (neither the const nor the non-const versions modify the container).
No contained elements are accessed by the call, but the iterator returned can be used to access or modify elements. Concurrently accessing or modifying different elements is safe.
Exception safety
No-throw guarantee: this member function never throws exceptions.
The copy construction or assignment of the returned iterator is also guaranteed to never throw.
See also
- vector::rbegin
- Return reverse iterator to reverse beginning (public member function
)
- vector::front
- Access first element (public member function
)
- vector::begin
- Return iterator to beginning (public member function
)
- vector::end
- Return iterator to end (public member function
)