Solved

basic c++ polymorphism question

Posted on 2013-05-14
2
239 Views
Last Modified: 2013-05-14
Hi Experts,

I have a tree of different kinds of objects.  i.e., the child nodes of higher level parents are of different types.  However, they all implement a similar interface - ISomething.

If I delete any of the objects by using the interface pointer like this:

delete (ISomething*) theObject;

Am I also safely deleting the underlying full object?  I think not.

Thanks for confirming,
Mike
0
Comment
Question by:thready
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 86

Accepted Solution

by:
jkr earned 500 total points
ID: 39165249
>> Am I also safely deleting the underlying full object?

As long as the base class destructor is virtual, you are - see http://www.codersource.net/c/c-miscellaneous/c-virtual-destructors.aspx ("C++ Virtual destructors") and http://blogs.msdn.com/b/oldnewthing/archive/2004/05/07/127826.aspx ("When should your destructor be virtual?"). It's actually a simple thing to do, and may have heavy impact if you don't use it.
0
 
LVL 1

Author Closing Comment

by:thready
ID: 39165264
Makes sense!  Thank you! :)
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
How to programmatically differentiate between C and Java 10 213
C++ mouse_event mouse look 7 111
c++, dynamic object by json 1 60
FMX TEdit KeyUp handler detecting  "enter" key 4 36
  Included as part of the C++ Standard Template Library (STL) is a collection of generic containers. Each of these containers serves a different purpose and has different pros and cons. It is often difficult to decide which container to use and …
Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
The viewer will learn how to user default arguments when defining functions. This method of defining functions will be contrasted with the non-default-argument of defining functions.
The viewer will learn additional member functions of the vector class. Specifically, the capacity and swap member functions will be introduced.

740 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question