Hey, I have a quick question.
How can I forward declare something when I use boost::shared_ptr?
ThanksCode:// File A class ClassA; typedef boost::shared_ptr<ClassA> ClassA_ptr; class A { Do cool stuff }; // File B class ClassA; class B { public: Do cool stuff private: ClassA_ptr variableName // <-- How to forward declare this one? };
In theory, yes - but you have to explicitly define the destructor and make sure that ClassA is fully defined at that point.
In practice, I've seen this fail on some compilers.
All the buzzt!
CornedBee
"There is not now, nor has there ever been, nor will there ever be, any programming language in which it is the least bit difficult to write bad code."
- Flon's Law
Ok, so its safer and easier to just include the header then I guess.
This is the first time im using smart pointers, so just one more quick question. Is there any problems when it comes to inheritance?
EDIT: Never mind the last question. I was lazy and asked instead of checking it out myself. It looks like inheritance is no problem at all.
Thanks for answering the original question CornedBee
Last edited by h3ro; 03-15-2009 at 12:26 PM.
Although note that a shared_ptr<Derived> won't implicitly convert to shared_ptr<Base>. But you can use dynamic_pointer_cast to get around that.
Originally Posted by Adak
Yes, it will. Or at least should. You should only need dynamic_pointer_cast to get from shared_ptr<Base> to shared_ptr<Derived>.
All the buzzt!
"There is not now, nor has there ever been, nor will there ever be, any programming language in which it is the least bit difficult to write bad code."
- Flon's Law
Funny. I could've sworn it didn't work before, but what do you know... it actually does work now.
Problem solved, then.
