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


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?


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