Vector Implementation in C++

srinietrx · 09-19-2015, 12:14 AM

I am implementing vector as Assignment project.
Completed till now
1.Allocatating memory in constructor
2.Added element using push_back() and also written resize() to set size of reserved memory
3.Forward Iterator

Now I am designing revesre_iterator
using below

Code:

class reverse_iterator
{
    public:
    reverse_iterator(T *p)
    : pos(p) { }
 
    reverse_iterator()
    : pos(0) { }
 
    T &amp;operator*()
    { return *pos; }
 
    T *operator-&gt;()
    { return pos; }
 
    reverse_iterator operator++(int)
    { pos--; return *this; }
 
    reverse_iterator operator--(int)
    { pos++; return *this; }
 
    bool operator!=(const reverse_iterator &amp;rhs)
    { return this-&gt;pos != rhs.pos; }
 
    private:
    T *pos;
};

Not able to understand what is written inside reverse_iterator class particularly
this line

Code:

 T *operator-&gt;()
    { return pos; } .

I am new to STL but having knowledge of C++ and oops.

HMW · 09-19-2015, 07:47 AM

Umm... pardon me, but since YOU are designing the reverse_iterator class:

Quote:

Originally Posted by srinietrx

Now I am designing revesre_iterator

Then how can you not...

Quote:

Originally Posted by srinietrx

understand what is written inside reverse_iterator class particularly
this line

Code:

 T *operator-&gt;()
    { return pos; } .

I am new to STL but having knowledge of C++ and oops.

Furthermore, I wish I could help you with the code. I studied C++ at uni some 7-8 years ago, and learnt to hate it with a vengeance. I made a vow to never use that language for anything in the future, it has been an easy promise to keep ;-)

Best of luck!
HMW