invalid use of template-name 'struct_name' without an argument list [duplicate]

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• invalid use of template-name without an argument list 1 answer

I'm trying to use a class template as a member of a simple struct. The code below illustrates this:

template <uint8_t id, uint16_t pin> 
class class_name
{
    // implementation
};

template <uint8_t id, uint16_t pin>
struct struct_name
{
    uint8_t data1;
    class_name<id, pin> data2;
};

Then I need to create an array of 'struct_name' in another class that is another template.

template <uint8_t N>
class other_class
{
private:
    static struct_name _array[N];
public:
    // other members
};

When I try to compile this code, the compiler gives me the following errors:

• '_array' was not declared in this scope
• invalid use of template-name 'struct_name' without an argument list

What am I doing wrong? Are there missing template parameters somewhere?