?
Solved

auto_ptr

Posted on 2011-03-10
6
Medium Priority
?
406 Views
Last Modified: 2012-05-11
Is there any difference betwwen the following declaration

std::string *myStr

str::auto_ptr<std::string> myStr;

Do I have to delete/destory any of these objects or does the compile takes care of it?
0
Comment
Question by:learningunix
[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
6 Comments
 
LVL 53

Accepted Solution

by:
Infinity08 earned 1000 total points
ID: 35099768
You didn't actually allocate any memory in either those statements, so there's also no need to de-allocate any memory.

However, assuming that you meant these instead :

        std::string* myStr = new std::string();
        std::auto_ptr<std::string> myStr(new std::string());

Then the former would require you to de-allocate the allocated memory yourself (using delete myStr), but the latter will clean up the memory for you automatically, as soon as myStr goes out of scope.

Read more on std::auto_ptr here :

        http://www.cplusplus.com/reference/std/memory/auto_ptr/
0
 
LVL 11

Expert Comment

by:DeepuAbrahamK
ID: 35105896
0
 
LVL 35

Expert Comment

by:sarabande
ID: 35107392
you might not find a reason for using a std::string pointer at all. std::string has dynamic management of internal buffer and reference counting. you won't get a benefit when using pointers rather than objects.

Sara
0
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 53

Expert Comment

by:Infinity08
ID: 35107436
Heh, I don't think that's the point of the question, Sara ;)
0
 
LVL 35

Expert Comment

by:sarabande
ID: 35107509
sorry, i always overact when i see pointers :)

Sara
0
 

Author Closing Comment

by:learningunix
ID: 35130688
got it
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

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

Often, when implementing a feature, you won't know how certain events should be handled at the point where they occur and you'd rather defer to the user of your function or class. For example, a XML parser will extract a tag from the source code, wh…
IntroductionThis article is the second in a three part article series on the Visual Studio 2008 Debugger.  It provides tips in setting and using breakpoints. If not familiar with this debugger, you can find a basic introduction in the EE article loc…
The viewer will learn how to use the return statement in functions in C++. The video will also teach the user how to pass data to a function and have the function return data back for further processing.
The viewer will learn how to clear a vector as well as how to detect empty vectors in C++.

777 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