Thread: Linked List header file

This is my header file for a linked list class. When I try to compile it says an internal error has occurred. What is wrong with my code.

Code:

#pragma once


#ifndef LINKED_LIST
#define LINKED_LIST


#include <iostream>
#include <vector>


#define LINKS 1


template <class T> struct SingleLinkedNode;
template <class T> struct DoubleLinkedNode;


#if !defined(LINKS) || LINKS == 1
template <class T, class U = SingleLinkedNode<T>>
class LinkedList {
#elif LINKS == 2
template <class T, class U = DoubleLinkedNode<T>>
class LinkedList {
#else 
#error implement me
#endif // LINKS


public:
	struct SingleLinkedNode {
		SingleLinkedNode *next = nullptr;
		T data;
	};


	struct DoubleLinkedNode {
		DoubleLinkedNode *previous = nullptr;
		DoubleLinkedNode *next = nullptr;
		T data;
	};


#ifndef NODE
#define NODE
#if !defined(LINKS) || LINKS == 1
	struct Node : public SingleLinkedNode;
#elif LINKS == 2
	struct Node : public DoubleLinkedNode;
#else 
#error implement me
#endif // LINKS
#endif // NODE


	LinkedList();
	LinkedList(U *firstPtr);
	LinkedList(T *ptr, const size_t& elements = 1);
	LinkedList(const std::vector<T>& vectorRef);
	template <size_t N> LinkedList(T arrayPtr[N]);
	LinkedList(const LinkedList<T>& listRef);


	~LinkedList();


	U* first();
	U* last();
	U* at(const size_t& index);
	U* del(const size_t& index);


	void clear();
	void set(U *firstPtr);
	void set(T *ptr, const size_t& elements);
	void set(const std::vector<T>& vectorRef);
	template <size_t N> void set(T arrayPtr[N]);
	void set(LinkedList<T> list);
	void replace(const T& oldValue, const T& newValue);
	void remove(const T& value);
	void reverse();
	void insertFront(const T& value);
	void insertBack(const T& value);
	void insert(const size_t& index, const T& value);
	int countOf(const T& value);
	bool contains(const T& value);
	bool isEmpty();


	T* data();
	std::vector<T> data();
	size_t length();
	size_t size();


	bool operator == (LinkedList<T> list);
	LinkedList& operator = (LinkedList<T> list);
	T& operator [] (const size_t& index);


private:
	U *firstNode;
};


#endif // LINKED_LIST

Error 1 error C1001: An internal error has occurred in the compiler.

That's my error

Originally Posted by cmajor28

Error 1 error C1001: An internal error has occurred in the compiler.

That's my error

Are there compiler flags you can use to get more verbose output than that?