Member Functions of Template Classes

Member functions can be defined inside or outside of a class template. They are defined like function templates if defined outside the class template.

Example

// member_function_templates1.cpp
template<class T, int i> class MyStack
{
    T*  pStack;
    T StackBuffer[i];
    static const int cItems = i * sizeof(T);
public: 
    MyStack( void );
    void push( const T item );
    T& pop( void );
};

template< class T, int i > MyStack< T, i >::MyStack( void )
{
};

template< class T, int i > void MyStack< T, i >::push( const T item )
{
};

template< class T, int i > T& MyStack< T, i >::pop( void )
{
};

int main()
{
}

Note that just as with any template class member function, the definition of the class's constructor member function includes the template argument list twice.

// member_templates.cpp
template<typename T>
class X
{
public:
   template<typename U>
   void mf(const U &u);
};

template<typename T> template <typename U>
void X<T>::mf(const U &u)
{
}

int main()
{
}

Description

Member functions can themselves be function templates, specifying additional parameters, as in the following example.

See Also

Concepts

Class Templates