Question

Here is my problem:

template<typename T>
class Outer 
{
public:
    template<typename U>
    class Inner 
    {
    private:
        static int count;
    };

    static int code;
    void print() const
    {
        std::cout << "generic";
    }
};

template<>
template<>
class Outer<bool>::Inner<bool> 
{
    static int count;
};

template<>
template<>
int Outer<bool>::Inner<bool>::count = 4; // ERROR

How do I initialize it properly?

Answer 1

Fully-specialized templates are in fact no longer templates, so your definition should simply be:

int Outer<bool>::Inner<bool>::count = 4;

In full, with all definitions in place, your code should look like:

template<typename T>
class Outer 
{
public:
    template<typename U>
    class Inner 
    {
    private:
        static int count;
    };

    static int code;
    void print() const
    {
        std::cout << "generic";
    }
};

template<typename T>
int Outer<T>::code = 0;

template<typename T>
template<typename U>
int Outer<T>::Inner<U>::count = 0;

template<>
template<>
class Outer<bool>::Inner<bool> 
{
    static int count;
};

int Outer<bool>::Inner<bool>::count = 4;