Re: [Boost-Users] Sorting a container of shared_ptr<T>

From: Darin Adler (darin_at_[hidden])
Date: 2002-08-29 14:13:17

On Thursday, August 29, 2002, at 11:07  AM, alejandro_escalante_medina 
wrote:

> Hello to everyone. I'm starting to take a look on Boost and was happy 
> to find things like better smart pointers. Though, in my tests, I 
> haven't been able to sort, say, a vector of shared_ptr without 
> defining special comparators. I thought that the overload for the < 
> operator would help me for that, but that operator compares pointers, 
> not objects, so it doesn't do the work that I expected.
>
> I guess I'm not understanding this well. Could someone explain this to 
> me?

Almost any technique that works for sorting a container of pointers, 
based on the values of the objects pointed to would also work for a 
container of shared_ptr's. That's the design approach of shared_ptr; it 
has the same semantics as pointers.

I found an article by Dietmar Kuehl at 
http://www.oonumerics.org/tmpw00/kuehl.html which talks about this very 
issue. You might find it helpful.

     -- Darin