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I have problems finding out how to test weather an iterator are at the
end of its container.

I'd like to do something like the following:

std::list<int>::iterator it = intList.begin();
while (it != intList.end()) {
if (!it.has_next())
std::cout << "This is at the last item in the container\n";

std::cout << "Number: " << *it << std::endl;

it++;
}

How would I do this the Best way? Am I looking past something obvious
here?

I use to write code like the following when facing this kind of tests:

typedef std::vector<int> MyVector;
typedef MyVector::const_iterator MyVectorCIt;

MyVector vect;
vect.push_back(10);
vect.push_back(100);
vect.push_back(1000);

MyVectorCIt it = vect.begin();
MyVectorCIt const end = vect.end();

while(it != end) {
int const& data = *it;
++it;
if(it == end) std::cout << "This is the last item: ";
std::cout << data << '\n';
}

Enselic ha escrit:
> I have problems finding out how to test weather an iterator are at the
> end of its container.
>
> I'd like to do something like the following:
>
> std::list<int>::iterator it = intList.begin();
> while (it != intList.end()) {
> if (!it.has_next())
> std::cout << "This is at the last item in the container\n";
>
> std::cout << "Number: " << *it << std::endl;
>
> it++;
> }
>
> How would I do this the Best way? Am I looking past something obvious
> here?

Enselic ÃÑÓáÊ:
> I have problems finding out how to test weather an iterator are at the
> end of its container.
>
> I'd like to do something like the following:
>
> std::list<int>::iterator it = intList.begin();
> while (it != intList.end()) {
> if (!it.has_next())
> std::cout << "This is at the last item in the container\n";
>
> std::cout << "Number: " << *it << std::endl;
>
> it++;
> }
>
> How would I do this the Best way? Am I looking past something obvious
> here?

if(it == intList.end()-1)

Enselic wrote:
> I have problems finding out how to test weather an iterator are at the
> end of its container.
>
> I'd like to do something like the following:
>
> std::list<int>::iterator it = intList.begin();
> while (it != intList.end()) {
> if (!it.has_next())
> std::cout << "This is at the last item in the container\n";
>
> std::cout << "Number: " << *it << std::endl;
>
> it++;
> }
>
> How would I do this the Best way? Am I looking past something obvious
> here?

There is no such thing as has_next() but you can just check if the
"next" item is end().

while ( it != intList.end() )
{
int x = *it++;

std::cout << x;
if ( it != intList.end() )
{
std::cout << ',';
}
}

If your collection is of a class you can use a reference or const
reference for a const_iterator. Thus:

while ( it != fooList.end() )
{
const foo & f = *it++;
//etc
}

Use a non-const reference if you have a non-const iterator and you are
going to modify the objects or call their non-const methods.