public member function
<list>

std::list::rbegin

      reverse_iterator rbegin();
const_reverse_iterator rbegin() const;
      reverse_iterator rbegin() noexcept;
const_reverse_iterator rbegin() const noexcept;
Return reverse iterator to reverse beginning
Returns a reverse iterator pointing to the last element in the container (i.e., its reverse beginning).

Reverse iterators iterate backwards: increasing them moves them towards the beginning of the container.

rbegin points to the element right before the one that would be pointed to by member end.

Notice that unlike member list::back, which returns a reference to this same element, this function returns a reverse bidirectional iterator.

Parameters

none

Return Value

A reverse iterator to the reverse beginning of the sequence container.

If the list 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 bidirectional iterator types (pointing to an element and to a const element, respectively). See list member types.

Example

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// list::rbegin/rend
#include <iostream>
#include <list>

int main ()
{
  std::list<int> mylist;
  for (int i=1; i<=5; ++i) mylist.push_back(i);

  std::cout << "mylist backwards:";
  for (std::list<int>::reverse_iterator rit=mylist.rbegin(); rit!=mylist.rend(); ++rit)
    std::cout << ' ' << *rit;

  std::cout << '\n';

  return 0;
}


Output:
mylist backwards: 5 4 3 2 1

Complexity

Constant.

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

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