c++ - How to template static factory method? -

how template below code? first, have book base:

class book { public:     book() {}     ~book() {} } 

then computerbook:

class computerbook: public book { public:     static computerbook* create() {         return new computerbook();     }  private:     computerbook ():book() {} } 

then phonebook:

class phonebook: public book { public:     static phonebook* create() {         return new phonebook();     }  private:     phonebook():book() {} } 

phonebook has 2 inheritances:

class phonebook1: public phonebook { public:     static phonebook1* create() {         return new phonebook1();     }  private:     phonebook1():phonebook() {} }   class phonebook2: public phonebook { public:     static phonebook2* create() {         return new phonebook2();     }  private:     phonebook2():phonebook() {} } 

so can merge computerbook , phonebook1, phonebook2 1 template?

from looks trying do, making static factory method called create of books. can templatize method this:

class book { public:     book() {}     ~book() {}     template<typename t>     static book* create() {         return new t();     } } 

and make phone book:

book::create<phonebook1>(); 

also make sure constructors each of books public, or friends of book::create static method.