Hi,
Please have a look at this code
when compiling it is giving error:
error C2440: '=' : cannot convert from 'ListNode *' to 'List<T>::ListNode *'
with
[
T=float
]
when I added List<T>:: before ListNode for
template<typename T>
List<T>::ListNode * List<T>::Head(void),
it gives a series of errors like undefined identifier T.....
Please tell me what is wrong here...
Thanks,
//////////////////////////////////////////////////////////////
#ifndef PLIST__H__
#define PLIST__H__
class ListNode;
/**
LinkedList class
*/
template<typename T>
class List
{
public:
void Init(void);
void Cleanup(void);
BOOL AddItem(T data);
ListNode * Head(void);
private:
/**
A node of the list
*/
class ListNode
{
ListNode(void){}
ListNode(const T& data, ListNode *next):m_data(data), m_next(next){}
public:
T m_data; ///<data
ListNode *m_next; ///<link to the next node
};
uint16 m_num_elems; ///<Number of elements in the list
ListNode *m_pstart; ///<Pointer to the first element of the list
public:
class Iterator
{
public:
Iterator(List<T> *plist);
void operator++(void);
T Content(void);
private:
List<T> *m_plist; ///<Pointer to the list
ListNode *m_plistnode; ///<Pointer to the listnode
};
};
//////////////////////////////////////////////////////////
//List
//////////////////////////////////////////////////////////
/**
Init List
*/
template<typename T>
void List<T>::Init(void)
{
m_num_elems = 0;
m_pstart = NULL;
}
/**
Add item to the front of the list
\param[in] data Data to be stored in the list
*/
template<typename T>
BOOL List<T>::AddItem(T data)
{
BOOL res = TRUE;
m_pstart = new ListNode(data, m_pstart);
if(!m_pstart)
{
LOG_FAILED;
ERXIT;
}
m_num_elems++;
xit:
LOG_IF_FAILED;
return res;
}
/**
Get the pointer to the first item in the list
*/
template<typename T>
ListNode * List<T>::Head(void)
{
return m_pstart;
}
/**
Cleanup routine
*/
template<typename T>
void List<T>::Cleanup(void)
{
}
////////////////////////////////////////////////////////////
//Iterator
///////////////////////////////////////////////////////////
/**
CTOR for iterator
\param[in] plist Pointer to list
*/
template<typename T>
List<T>::Iterator::Iterator(List<T> *plist)
:m_plist(plist)
{
m_plistnode = plist->Head();
}
/**
Increment operator
*/
template<typename T>
void List<T>::Iterator::operator++(void)
{
m_plistnode = m_plistnode->m_next;
}
/**
Get the content of the node iterator currently points
return content of the node iterator currently points
*/
template<typename T>
T List<T>::Iterator::Content(void)
{
return m_plistnode->m_data;
}
#endif//PLIST__H__
