CODEWITHSUNDEEP
c++abstract
Judith
Judith

Reputation: 11

call a non-static method from static method in abstract class (c++)

someone know by chance about a workaround to call non-static method from static method in abstract class in C++?

for example, i have the following abstract class:

class aClass
{
  public: 
   static int check();
   virtual int check_deep()=0;
}

and i want to call to check_deep() form check()

thanks in advance, Judith.

Upvotes: 1

Views: 177

Answers (3)

πάντα ῥεῖ
πάντα ῥεῖ

Reputation: 1

You'll need to change your static method's signature to receive a reference (or pointer) to an instance of aClass to do so:

class aClass
{
  public: 
   static int check(aClass& instance);
   virtual int check_deep()=0;
}

int aClass::check(aClass& instance)
{
     return aClass.check_deep();
}

The design smells somehow though!

Upvotes: 2

Wojtek Surowka
Wojtek Surowka

Reputation: 20993

No way to do it. Non-static method requires an object to act on, and in your case when it is pure virtual the object even decides which exact method will be called. You absolutely need an object of aClass type to call check_deep.

Upvotes: 0

Stefano Sanfilippo
Stefano Sanfilippo

Reputation: 33046

No. And it would not make sense, since a non-static method is bound to an instance of the class (to which you refer as this) while a static method is not bound to any instance: there would be no this to bind check_deep to from check.

Obviously, supposing that you will be calling it from a subclass, otherwise check_deep is pure virtual and you won't be able to invoke it.

Upvotes: 0

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