Errori di tipo "classe" C++

Question

Ho lavorato a una classe di template elenco collegato per fare la stessa cosa con una varietà di variabili e sono riuscito a risolvere la maggior parte dei problemi. Tranne quando compilo, ottengo questi:

g++ -Wall -o template_test template_test.cpp 
In file included from template_test.cpp:1:0: 
LinkedList.h:50:11: error: declaration of ‘class Type’ 
LinkedList.h:7:11: error: shadows template parm ‘class Type’ 
LinkedList.h:51:30: error: invalid use of incomplete type ‘class LinkedList<Type>’ 
LinkedList.h:8:7: error: declaration of ‘class LinkedList<Type>’ 
LinkedList.h:56:11: error: declaration of ‘class Type’ 
LinkedList.h:7:11: error: shadows template parm ‘class Type’ 
LinkedList.h:57:51: error: invalid use of incomplete type ‘class LinkedList<Type>’ 
LinkedList.h:8:7: error: declaration of ‘class LinkedList<Type>’ 
LinkedList.h:92:11: error: declaration of ‘class Type’ 
LinkedList.h:7:11: error: shadows template parm ‘class Type’ 
LinkedList.h:93:31: error: invalid use of incomplete type ‘class LinkedList<Type>’ 
LinkedList.h:8:7: error: declaration of ‘class LinkedList<Type>’ 
LinkedList.h:102:11: error: declaration of ‘class Type’ 
LinkedList.h:7:11: error: shadows template parm ‘class Type’ 
LinkedList.h:103:34: error: invalid use of incomplete type ‘class LinkedList<Type>’ 
LinkedList.h:8:7: error: declaration of ‘class LinkedList<Type>’ 
LinkedList.h:119:11: error: declaration of ‘class Type’ 
LinkedList.h:7:11: error: shadows template parm ‘class Type’ 
LinkedList.h:120:48: error: invalid use of incomplete type ‘class LinkedList<Type>’ 
LinkedList.h:8:7: error: declaration of ‘class LinkedList<Type>’ 
LinkedList.h:158:11: error: declaration of ‘class Type’ 
LinkedList.h:7:11: error: shadows template parm ‘class Type’ 
LinkedList.h:159:37: error: invalid use of incomplete type ‘class LinkedList<Type>’ 
LinkedList.h:8:7: error: declaration of ‘class LinkedList<Type>’ 
LinkedList.h:193:11: error: declaration of ‘class Type’ 
LinkedList.h:7:11: error: shadows template parm ‘class Type’ 
LinkedList.h:194:34: error: invalid use of incomplete type ‘class LinkedList<Type>’ 
LinkedList.h:8:7: error: declaration of ‘class LinkedList<Type>’ 
LinkedList.h:210:11: error: declaration of ‘class Type’ 
LinkedList.h:7:11: error: shadows template parm ‘class Type’ 
LinkedList.h:211:34: error: invalid use of incomplete type ‘class LinkedList<Type>’ 
LinkedList.h:8:7: error: declaration of ‘class LinkedList<Type>’ 
make: *** [template_test] Error 1 

Dice più o meno la stessa cosa per ogni funzione template che ho. Qualcuno può decifrare per me cosa significano questi messaggi, cosa sta causando al compilatore di lanciare questi messaggi, e come posso risolvere questo problema? Sarò riletto, e possibile riscrivere il mio codice nel frattempo.
Il mio codice è il seguente:

#include <string> 
#include <iostream> 
using namespace std; 

template <class Type> 
class LinkedList{ 
public: 

* default constructor and a copy constructor that creates a copy 
* of the given object*/ 
LinkedList(); //default construtor 
LinkedList(const LinkedList& lst); //copy constructor 
~LinkedList();//destructor 

void add(Type data); 

void insertAt(int pos, Type data); 

bool remove(Type data); 

void removeAll(); 

void printList(); 

template <class Type> 
LinkedList<Type>::LinkedList(){ 
head = NULL; 
size = 0; //Don't forget to do this!!! 
} 

template <class Type> 
LinkedList<Type>::LinkedList(const LinkedList& lst){ 
if (lst.head == NULL){ 
    head = NULL; 
    size = 0; 
} 
else{ 
    head = new Node; 
    head->data = lst.head->data; 
    Node *pNewNode = head; 
    Node *pOldNode = lst.head->next; 
    while (pOldNode != NULL){ 
     pNewNode->next = new Node; 
     pNewNode = pNewNode->next; 
     pNewNode->data = pOldNode->data;; 
     pOldNode = pOldNode->next; 
    } 
    pNewNode->next = NULL; 
    size = lst.size; 
} 
} 

template <class Type> 
LinkedList<Type>::~LinkedList(){ 
    removeAll(); 
} 

template <class Type> 
void LinkedList<Type>::add(Type x){ 
Node *p = new Node; //temporary node 
// Assign appropriate values to the new node 
p -> data = x; 
p -> next = head; 
// Make the head point to the new node 
head = p; 
size++; 
} 

template <class Type> 
void LinkedList<Type>::insertAt(int pos, Type x){ 
Node *p; 
Node *newNode; 

// Check that pos is a valid index 
if (pos <= size){ 
    newNode = new Node; //new node 
    newNode->data = x; 

    // Deal with case when item is to be inserted at the head of the list 
    if (pos == 0){ 
     newNode->next = head; 
     head = newNode; 
    }// if(pos == 0) 
    else{ 
     p = head; 
     // Move to position BEFORE insertion point 
     for(int i = 0; i < pos-1; i++){ 
      // Check that p points to a node 
      // Note using exception handling should throw an exception   
      if(p == NULL){ 
       return; 
      } 
      p = p->next; 
     }//for 
     // Insert node 
     newNode->next = p->next; 
     p->next = newNode; 
    }//else (pos != 0) 
    size++; 
}//else (pos >= size) do nothing 
} 

template <class Type> 
bool LinkedList<Type>::remove(Type x){ 
Node *p = head; 
Node *temp; 
if (head == NULL){ 
    return false; 
} 
else if (head->data == x){ 
    head = head->next; 
    delete p; //currently assigned head 
    size--; 
    return true; 
} 
else{ 
    while(p->next != NULL){ 
     // Check next node for target 
     if(p->next->data == x){ 
      temp = p->next; 
      p->next = p->next->next; 
      delete temp; 
      return true; 
     } 
     p = p->next; 
    } 
} 
return false; 
} 

template <class Type> 
void LinkedList<Type>::removeAll(){ 
Node *p = head; 
// Traverse the list deleting nodes 
while (p!= NULL){ 
    head = head->next; // Mustn't "lose" the next node 
    delete p; // De-allocate memory 
    p = head; // Go to next node 
} 
head = NULL; 
size = 0; 
} 

template <class Type> 
void LinkedList<Type>::printList(){ 
Node *p = head; 
cout << "["; //Nice format! 
// Traverse the list 
while (p != NULL){ 
    cout << p -> data; // Print data 
    p = p -> next; // Go to next node 
    if (p != NULL){ 
     cout << ","; // Print a comma unless at the end of the list 
    } 
} 
cout << "]"; // Don't print a newline - it might not be wanted 
} 


private: 
struct Node { 
    Type data; //list data 
    Node *next; //pointer to next item in the list 
}; 

Node *head; //Pointer to the first node in the list 
int size; //Records the number of nodes in the list 
}; 

Answer 1

Si sta utilizzando la sintassi per definire una funzione di membro al di fuori del campo di applicazione di una classe all'interno una classe. Questo non funziona.

Questo dovrebbe farlo:

template<typename X> 
class Foo { 
public: 
    void f(); 
}; // notice end of class scope here 

template<typename X> 
void Foo<X>::f() { 
    // impl 
}