Re: [boost] [review] Fusion review, finalization, memory footprints

From: Larry Evans (cppljevans_at_[hidden])
Date: 2006-05-15 13:31:24

On 05/15/2006 07:49 AM, David Abrahams wrote:
> Joel de Guzman <joel_at_[hidden]> writes:
> 
>>David Abrahams wrote:
[snip]
>>>Seems to me a vector can't do as well as some other structures when
>>>many of the elements of the tuple are empty classes.
>>
>>In terms of memory footprint?
> 
> Yes.
> 
Isn't the list<T0,T1,T2,...> memory the same as that of:

   struct
   { T0 car;
     struct
     { T1 car;
       struct
       { T2 car;
         struct
         {
         ...
         }  cdr;
       }  cdr;
     }  cdr;
   };

and the vector<T0,T1,T2,...> memory the same as that of:

   struct
   { T0 m0;
     T1 m1;
     T2 m2;
     ...
   }

?  If so, what's the reason the memory footprints would be different?
If not, could you explain what is the footprint, preferably using
some struct counterpart like those above?

TIA.