problem passing list iterator

[vfunc@talktalk.net]

I want to pass a list "node" to a function, read only access of the
list is fine, this is the relevant code I have so far

typedef std::vector<dou ble> myvec;
typedef std::list<myvec > mylist; // a list of vectors
typedef mylist::const_i terator myiter;

void a(myiter &x)
{
int i;
....
// do something with
x[i]
};

The compiler does not like x[i]
"no match for operator [] .."
why is that?

How can I access the node like as if it were a myvec (by reference is
nice if that is OK).

Thanks.

[Marcus Kwok]

Re: problem passing list iterator

vfunc@talktalk. net <vfunc@talktalk .net> wrote:[color=blue]
> I want to pass a list "node" to a function, read only access of the
> list is fine, this is the relevant code I have so far
>
> typedef std::vector<dou ble> myvec;
> typedef std::list<myvec > mylist; // a list of vectors
> typedef mylist::const_i terator myiter;
>
> void a(myiter &x)
> {
> int i;
> ...
> // do something with
> x[i]
> };
>
> The compiler does not like x[i]
> "no match for operator [] .."
> why is that?[/color]

x is a const_iterator. const_iterator does not have an operator[].
[color=blue]
> How can I access the node like as if it were a myvec (by reference is
> nice if that is OK).[/color]

Try (*x)[i].

--
Marcus Kwok