Re: [boost] Ion Gaztañaga's Intrusive Library

From: Tobias Schwinger (tschwinger_at_[hidden])
Date: 2007-03-16 19:48:04

Hi,

Tom Brinkman wrote:
<comments about the introduction>

I felt exactly the same after reading the introduction.

Then I figured it might be about "one-shot allocation" and reading the 
rest of this thread it seems that assumption has been correct.

Anyway, I still don't understand why we can't have intrusive containers 
without intrusive syntax. E.g:

     struct slist_node // <-- part of container implementation
     {
         T element; // note: held by value
         slist_node * next;
     };

Then there's only one allocation per 'slist_node'.

With compiler options that enable structure padding (up to 2^n, for 
alignment) it will be bad, but usually it can be disabled for individual 
structures (in this case one would have to disable alignment/padding for 
whatever T is).

So, why does the user have to add custom data members?

Regards,
Tobias