具有多种类型的类的模板专业化

Question

Class declaration is in a class.h file :

template <typename K, typename T>
class classx
{
  ...
  unsigned int func1(K key);
  ...

which includes this class.hpp :

template <typename K, typename T>
unsigned int classx<K,T>::func1(K key)
{
    return 1;
}


//Func1 for <int, typename T>       ????

template <>
template <typename T>
unsigned int classx<int,T>::func1<int, T>(int key)  // ERROR!
{
    return 1;
}

This results:

error: expected initializer before '<' token

What is the proper way of doing this?

Answer 1

Remove the second set of template parameters from your func1 definition and the template <> :

template <typename T>
unsigned int classx<int,T>::func1(int key)
{
    return 1;
}

EDIT:

Additionally, you cannot partially specialize a single function of a template class . If you wish to do so, you will have to partially specialize the entire class.