public member function
<array>
std::array::rbegin
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 array container.
rbegin points to the element right before the one that would be pointed to by member end.
Notice that unlike member array::back, which returns a reference to this same element, this function returns a reverse random access iterator.
Return Value
A reverse iterator to the reverse beginning of the sequence.
If the array object is const-qualified, the function returns a const_iterator. Otherwise, it returns an 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
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// array::rbegin/rend
#include <iostream>
#include <array>
int main ()
{
std::array<int,4> myarray = {4, 26, 80, 14} ;
std::cout << "myarray contains:";
for ( auto rit=myarray.rbegin() ; rit < myarray.rend(); ++rit )
std::cout << ' ' << *rit;
std::cout << '\n';
return 0;
}
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Output:
myarray contains: 14 80 26 4
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Notice how the reverse iterator iterates through the vector in a reverse way by increasing the iterator.
Iterator validity
No changes.
Data races
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
- array::crbegin
- Return const_reverse_iterator to reverse beginning (public member function)
- array::back
- Access last element (public member function)
- array::rend
- Return reverse iterator to reverse end (public member function)
- array::begin
- Return iterator to beginning (public member function)
- array::end
- Return iterator to end (public member function)