Pointer to array as template parameter

Question

I'd like to instanciate my object with template parameters only. One of the parameters is a pointer to array, and I'm looking for the correct syntax.

const MyCustomType* array[2] = { &object1, &object2 };

OBJ1 < 10, 10, array > myobj1;

Below, a sample of the class OBJ1.

template < int a, int b, /* help ! */ >
class OBJ1
{
  public:
    OBJ1();
    ~OBJ1();

  private:
    //methods
};

What's the right syntax to use the third template parameter ? Is that even possible ?

That's not a pointer to an array, it's an array of [2] pointers. — Benjamin Lindley
– Benjamin Lindley, Commented Oct 12, 2012 at 9:29

Johannes Schaub - litb · Accepted Answer · 2012-10-12 12:37:23Z

1

For an array of type int of size n the syntax is

int (*paramname)[N];

Or with a helper type alias

template<typename T>
using type = T;

Then

type<int[N]> *paramname;

In your case you pass a pointer to the arrays first element though, and not a pointer to the array. You need to prefix the array name with & to do the latter when passing the array.

answered Oct 12, 2012 at 12:37

Johannes Schaub - litb

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