Re: STL Map iterator compilation error

From:

red floyd <no.spam@here.dude>

Newsgroups:

comp.lang.c++

Date:

Thu, 29 Nov 2007 00:26:52 GMT

Message-ID:

<gHn3j.71867$YL5.14243@newssvr29.news.prodigy.net>

Rakesh Kumar wrote:

I am encountering the following issue with STL map iterator - wrapped
within a template. ( I am wrapping it withing a template since I want
to hide the map implementation from the user . At a later point - this
could be a custom hashmap (as opposed to rb-tree map that stl
provides ).

#include <string>
#include <map>
#include <iostream>

template<typename K, typename V> class TestMap
{

public:
    void insert(const std::pair<K, V> & ap)
    {
        data.insert(ap);
    }

    void list()
    {

typename std::map<K,V>::iterator it = data.begin();

std::map<K,V>::iterator is a dependent name, the compiler needs some
help to know it's a type.

        std::map<K, V>::iterator it = data.begin();
                            //compiler errors here - error: expected
`;' before "it"

        for (; it != data.end(); ++it)
        {
            std::cout << it->first << " --> " << it->second << "\n";
        }
    }

private:
    std::map<K, V> data;
};

using std::string;

int main()
{
    TestMap<std::string, int> data;

    data.insert(std::pair<string, int >("Hello", 1));
    data.insert(std::pair<string, int >("World", 1));
    return EXIT_SUCCESS;
}

The compiler errors out with the following message.

test.cxx:17: error: expected `;' before "it"

Any idea if I am missing anything here.