6.2.2 Class Template Definition

A class template definition must declare the class data and function members, as in the following examples.

template <class Elem> class Array {
        Elem* data;
        int size;
    public:
        Array( int sz );
        int GetSize();
        Elem& operator[]( int idx );
};

template <unsigned Size> class String {
        char data[Size];
        static int overflows;
    public:
        String( char *initial );
        int length();
};

Unlike function templates, class templates can have both type parameters (such as class Elem) and expression parameters (such as unsigned Size). An expression parameter can be:

• A value that has an integral type or enumeration

• A pointer or a reference to an object

• A pointer or a reference to a function

• A pointer to a class member function