'仅将成员函数添加到类的专用模板

Question

I have a template class and I want to add a special function to a particular specialization of the template. This function only makes sense for the std::string template.

I showed how I am handling this currently...the problem is that the deleted function is still visible to all template types, and not just the Match template that I want to use it with.

Is there a more elegant way to handle this dilemma?

 template<typename T> 
 class Match {

  /*
   *Class Definition
   * 
   */

   void string_function() = delete;
 };

template<>
void Match<Std::string>::string_function(){

    //do something that only makes sense with strings
}

Answer 1

You can factor the common code in a base class template and make derived specialization with the tailored features.

template <typename T>
class BaseMatch { /* Common features across all specializations... */ };

template <typename T>
class Match : BaseMatch<T> { /* Generic case, no custom behavior to enforce */ };

template <>
class Match<std::string> : BaseMatch<std::string> {
    void string_function() { /* ... */ }
};

Answer 2

void string_function() = delete;

It will deallocate function from class scope, again you tring to define function. It's like if you deleted a gmail account and try to login saying not able to login, that is not possible right, may I know the reason why you want to delete than can come up with some solution.