Solved

How do I iterate over a vector that is wrapped in a smart pointer in Microsoft C++ 11?

Posted on 2015-02-10
2
190 Views
Last Modified: 2015-02-10
Hi:

I have a Microsoft C++ 11 application.

I have a vector of shared_ptrs that get returned from a method call.
In order for that vector not to be leaked, I have wrapped it in a shared_ptr as well.

How do I iterate over that vector when it is wrapped in a smart (shared) pointer?

// Definition of the method
shared_ptr<vector<shared_ptr<Foo>>> GetVectorOfValues(){}

// Now in another method....
{
   ...
   shared_ptr<vector<shared_ptr<Foo>>> values =  GetVectorOfValues();

   for (auto value : values.get())
   {
   }
}

Open in new window


I would have thought that "get()" would get me to the wrapped vector.
How would I go about doing this?

Is there a better pattern to use to achieve my goals?

Thanks,
JohnB
0
Comment
Question by:jxbma
2 Comments
 
LVL 86

Accepted Solution

by:
jkr earned 500 total points
ID: 40601615
Let me try to 'unwrap' that the old-school way for readability:

// Definition of the method
shared_ptr<vector<shared_ptr<Foo>>> GetVectorOfValues(){}

// Now in another method....
{
   ...
   shared_ptr<vector<shared_ptr<Foo>>> values =  GetVectorOfValues();

   vector<shared_ptr<Foo>>* vec = values.get())
    for (vector<shared_ptr<Foo>>::iterator i = vec->begin(); i != vec->end(); ++i)
   {
        Foo* foo = i->get();
   }
}
                                  

Open in new window


Is that what you had in mind?
0
 
LVL 1

Author Closing Comment

by:jxbma
ID: 40602257
Thank-you old school!
0

Featured Post

Salesforce Made Easy to Use

On-screen guidance at the moment of need enables you & your employees to focus on the core, you can now boost your adoption rates swiftly and simply with one easy tool.

Question has a verified solution.

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

Suggested Solutions

Introduction This article is a continuation of the C/C++ Visual Studio Express debugger series. Part 1 provided a quick start guide in using the debugger. Part 2 focused on additional topics in breakpoints. As your assignments become a little more …
For most people, the WrapPanel seems like a magic when they switch from WinForms to WPF. Most of us will think that the code that is used to write a control like that would be difficult. However, most of the work is done by the WPF engine, and the W…
The viewer will be introduced to the member functions push_back and pop_back of the vector class. The video will teach the difference between the two as well as how to use each one along with its functionality.
This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. http://www.experts-exchange.com/videos/1478/Excel-Error-Handlin…

820 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