c++模板类包含typedef 指针函数，vs2012编译错误

#include "stdafx.h"
#include<stdexcept>
#ifndef ToozyBinaryTreeHead
#define ToozyBinaryTreeHead
template <class T>
class ToozyBinaryTree{
public:
    typedef bool (*findFunc)(typename const ToozyBinaryTree<T>::ToozyBinaryTreeNode*,const T*); 
    static const int LEFT = 1;
    static const int RIGHT = 2;

    struct ToozyBinaryTreeNode{
        ToozyBinaryTreeNode *left;
        ToozyBinaryTreeNode *right;
        ToozyBinaryTreeNode *nextNode;
        T value;
        ToozyBinaryTreeNode(const T *v){
            value = *v;
            left = nullptr;
            right = nullptr;
            nextNode = nullptr;
        }
    };

    findFunc findFunction;
    ToozyBinaryTree(ToozyBinaryTreeNode *root);
    ToozyBinaryTree(T *v);
    ~ToozyBinaryTree();
    const ToozyBinaryTreeNode *find(const T *value) const;
    const ToozyBinaryTreeNode *add(const ToozyBinaryTreeNode *parent,const T *value,int type);
    const ToozyBinaryTreeNode *getRoot();
protected:
    ToozyBinaryTreeNode* _root;
    ToozyBinaryTreeNode* _lastNode;
};

typedef bool (findFunc)(typename const ToozyBinaryTree::ToozyBinaryTreeNode,const T*);
应该怎么改？