template parameter representation

Consider the source snippet

Code:

---


typedef hw_default < volatile unsigned short > hw_default_type;
 
typedef hw_register_struct < volatile unsigned short,
                            some_other_policy < unsigned short >,
                            0x500,
                            0 > hw_register_struct_type;
 
int main()
{
  unsigned short aa ( 0 );
  foo < volatile unsigned short, 5, 6 > aa5_6 ( aa );
 
  hw_default_type ab ;
  foo < hw_default_type, 5, 6 > ab5_6 ( ab );
 
  //hw_register_struct_type ac ;
  //foo < hw_register_struct_type, 5, 6 > ac5_6 ( ac );
 
}

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The code today is not extensible because it's structured around the default - hw_default_type which works for 'most' cases. I'm trying to modify source such that I could use the composite type hw_register_struct_type (commented out in main) and hw_default_type as parameters within the same code base. How could I achieve this?

would it be possible to post a minimum code to make it compile.

I had built my own skeleton classes to make the code compile, given below is the example.

For me it compiles ok, after uncommenting the lines:

Code:

---

template<typename T>
class hw_default
{};

template<typename T1, typename T2, int, int>
class hw_register_struct
{};

template<typename T>
class some_other_policy
{};

typedef hw_default < volatile unsigned short > hw_default_type;

template<typename T1, int, int>
class foo
{
    public:
        foo(T1) {};
};



typedef hw_register_struct < volatile unsigned short,
                            some_other_policy < unsigned short >,
                            0x500,
                            0 > hw_register_struct_type;

int main()
{
        unsigned short aa ( 0 );
       

    foo < volatile unsigned short, 5, 6 > aa5_6 ( aa );
       
        hw_default_type ab ;
        foo < hw_default_type, 5, 6 > ab5_6 ( ab );
       
        hw_register_struct_type ac ;
        foo < hw_register_struct_type, 5, 6 > ac5_6 ( ac );
       
}

---