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

// 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()
{
}

See Also

Reference

Class Templates