Iterator Adaptor?

From: David Brownell (david_brownell_at_[hidden])
Date: 2002-03-26 20:18:20

I have a hunch that this has been asked before, but I can't seem to find
the answer.  I have a struct similar to:

struct MyStruct
{
        int		i;
        char		c;
};

And a functor similar to:

struct MyFunctor
{
        void operator()(int i)
        {
                //Do something with i
        }
};

Given a container of MyStruct objects, how can I use iterator_adaptor to
use MyStruct::i with MyFunctor?  Something like:

std::vector<MyStruct>    v;
std::for_each(v.begin(), v.end(), MyFunctor());

I have overridden the dereference method in default_iterator_policies to
return the integer, but am at a bit of a loss where to go from here.

Am I on the right track?

TIA for your help!
David Brownell