dolfin team mailing list archive

[Ola Skavhaug <skavhaug@xxxxxxxxx>]

Matthew Knepley skrev den 25/04-2008 følgende:
> On Fri, Apr 25, 2008 at 5:09 PM, Garth N. Wells <gnw20@xxxxxxxxx> wrote:
> >
> >
> >  Anders Logg wrote:
> >  > Why should the functions be virtual?
> >  >
> >
> >  This was discussed the other day (brought up by Ola)
> >
> >    http://www.fenics.org/pipermail/dolfin-dev/2008-April/007496.html
> >
> >  and has been implemented for a few functions in various la classes. I
> >  was indifferent before to it, but now I see a benefit with the matrix
> >  classes. If it's clear to me that a function is a virtual function, I
> >  know that it can't be inlined and there will be some overhead which is
> >  important to know for some operations.
> 
> One reason that inheritance is outmoded. Templated methods could be
> inlined, whereas virtual methods cannot.
> 
>   Matt

As a side note, virtual inline might make sense. See:
http://www.cubik.org/mirrors/taligent/Docs/books/WM/WM_127.html

Ola
 
> >  Garth
> -- 
> What most experimenters take for granted before they begin their
> experiments is infinitely more interesting than any results to which
> their experiments lead.
> -- Norbert Wiener
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