Re: STL and polymorphic paramaters

From:

ricecake@gehennom.invalid (Marcus Kwok)

Newsgroups:

comp.lang.c++.moderated

Date:

21 Sep 2006 15:05:19 -0400

Message-ID:

<eeulh1$jlg$1@news-int2.gatech.edu>

christian.bongiorno@gmail.com wrote:

Can someone explain to me how I can create a polymorphic iterative
function for, as an example, list and vector -- as in:

void printMe({list | vector} myStuff) {
   SomeType< >::const_iterator itr;
   for(itr = myStuff.begin(); itr != myStuff.end(); itr++)
          cout << *itr << endl;
}

I am not sure this is possible, much less what the syntax might be

You can do this with a simple template on the container:

#include <iostream>
#include <vector>
#include <list>

template <typename Container>
void printMe(const Container& myStuff)
{
    Container::const_iterator it;
    for (it = myStuff.begin(); it != myStuff.end(); ++it) {
        std::cout << *it << '\n';
    }
}

int main()
{
    std::vector<int> odds;
    std::list<int> evens;

    odds.push_back(1);
    odds.push_back(3);
    odds.push_back(5);
    odds.push_back(7);
    odds.push_back(9);

    evens.push_back(2);
    evens.push_back(4);
    evens.push_back(6);
    evens.push_back(8);
    evens.push_back(10);

    printMe(odds);
    printMe(evens);
}

--
Marcus Kwok
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