Difference between these two codes?
So take a look at both these codes here:
(1) www.cplusplus.com/reference/vector/vector/rbegin/
(2) http://www.cplusplus.com/reference/iterator/reverse_iterator/operator++/
Link #1 declares a reverse iterator like so:
While link #2 declares one like this:
The codes are using two different iterator objects (declared differently) but are essentially doing the same exact thing: iterating backwards through a vector. In fact, link #2 seems to be a convoluted way of doing what link #1 is doing.
So my question is, what is even the point of std::reverse_iterator in the <iterator> library when there is already a nested reverse_iterator within the vector class? Is there some additional functionality that the former provides which the latter lacks?
(1) www.cplusplus.com/reference/vector/vector/rbegin/
(2) http://www.cplusplus.com/reference/iterator/reverse_iterator/operator++/
Link #1 declares a reverse iterator like so:
std::vector<int>::reverse_iterator rit = myvector.rbegin();While link #2 declares one like this:
std::reverse_iterator<iter_type> rev_untilThe codes are using two different iterator objects (declared differently) but are essentially doing the same exact thing: iterating backwards through a vector. In fact, link #2 seems to be a convoluted way of doing what link #1 is doing.
So my question is, what is even the point of std::reverse_iterator in the <iterator> library when there is already a nested reverse_iterator within the vector class? Is there some additional functionality that the former provides which the latter lacks?
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It's the same type, only different names.
std::vector<int>::reverse_iterator is a typedef of std::reverse_iterator<std::vector<int>::iterator>
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