Re: Namespace problem with nested class
On Tue, 26 Sep 2006 21:20:06 -0600, Dave Rudolf <dave.rudolf@usask.ca>
wrote:
I have a container class and want to define a nested iterator class for it so
that I can use some of the STL's algorithms. However, when I try to do that,
the compiler gives me errors related to identifiers. What I have is the following:
class AdjacencyList
{
public:
const iterator& begin();
const iterator& end();
class iterator
{
public:
iterator( AdjacencyList& list );
};
// More stuff here, but not important
};
You need to declare iterator before you use it. You can either
forward-declare it or move the class declaration to the top of
AdjacencyList. To forward-declare it, do this:
class AdjacencyList
{
public:
class iterator;
const iterator& begin();
const iterator& end();
class iterator
{
public:
iterator( AdjacencyList& list );
};
// More stuff here, but not important
};
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