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#include "Node.h"
template<class Type>                           //Error  4   error C3857: 'List': multiple template parameter lists are not allowed

class List
{
 
public:
    List();
    ~List();
    void AddNode(void);
 

private:
    Node<Type>* m_pNode;
 
};                                            //Error   3   error C2989: 'List' : class template has already been declared as a non-class template

 
template<class Type>
List<Type>::List():m_pNode(NULL)       //Error   5   error C2988: unrecognizable template declaration/definition       //Error   6   error C2059: syntax error : '<'

 
{
}
 

 
template<class Type>
List<Type>::~List()                    //Error  7   error C2588: '::~List' : illegal global destructor    //Error   8   fatal error C1903: unable to recover from previous error(s); stopping compilation

{
    Node<Type>* pNode = NULL;
 
    while (m_pNode != NULL)
    {
        pNode = m_pNode;
        m_pNode = m_pNode->m_pNext;
        delete pNode;
    }
    m_pNode = NULL;
}
 
template<class Type>
void List<Type>::AddNode( void )
{
    if (m_pNode == NULL)
    {
        m_pNode = new Node<Type>();
    }
    else
    {
        Node* pTailNode = m_pNode;
 
        while (pTailNode->m_pNext != NULL)
        {
            pTailNode = pTailNode->m_pNext;
        }
 
        pTailNode->m_pNext            = new Node<Type>();
        pTailNode->m_pNext->m_pBefore = pTailNode;
 
    }
}

template<class Type>
class Node
{
    friend class List<Type>; // Error   1   error C2059: syntax error : '<'

public:
    Node ();               //Error  2   error C2238: unexpected token(s) preceding ';'

private:
    Type  m_nData;
    Node<Type>* m_pNext;
    Node<Type>* m_pBefore;
};
 
template<class Type>
Node<Type>::Node() : m_pNext(NULL),m_pBefore(NULL)
{
}

#include "List.h"

int _tmain(int argc, _TCHAR* argv[])
{
    List<int> myList;
    myList.AddNode();
 
    return 0;
}


Thanks for your help!!!
Posted 5-Jun-10 23:37pm
jc24386
Edited 6-Jun-10 5:02am
Moak11.5K
v2
Comments
Moak 6-Jun-10 11:04am
   
Updated subject, tags and formatting. I am pretty sure I have seen this question previously today, wonder where it went?
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Solution 1

Try forward declaring List in Node.h:

template <class Type> class List;

and then declare it as a friend in Node<Type>:

friend List<Type>;

Cheers,

Ash
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Comments
jc24 6-Jun-10 7:32am
   
Thank you very much
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Solution 2

You may want to take a look at Sam Buss' excellent linked list. I use it in my CXMLProfile class here on CP. You can download it from Sam's site at http://www.math.ucsd.edu/~sbuss/MathCG/[^].

Click on the link for "Ray Trace software". In the zip file you will find a directory called DataStructs. You want the CLinkedList file.
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