Re: Virtual function call optimization

From	Miles Bader <miles@gnu.org>
Newsgroups	comp.lang.c++
Subject	Re: Virtual function call optimization
Date	2011-09-27 13:47 +0900
Organization	NEC Electronics
Message-ID	<buod3emiobx.fsf@dhlpc061.dev.necel.com> (permalink)
References	(4 earlier) <f22d1a09-5f04-40f5-869e-6c43ab36e7c5@j10g2000vbb.googlegroups.com> <4e80935c$0$31233$a8266bb1@newsreader.readnews.com> <d47cdff0-a16e-4bcc-bb28-476056e6a9a5@e9g2000vby.googlegroups.com> <Xns9F6CCA16CE458myfirstnameosapriee@216.196.109.131> <j5r2lj$9r5$1@dont-email.me>

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Richard Damon <news.x.richarddamon@xoxy.net> writes:

> Another method, if you are willing to upgrade to C++11, and the object
> definition allows it, is to declair foo() to be final, as in
...
> class D: public B
> {
> public:
> void foo() final ( ... }
> }
>
> since D::foo is final, late binding is not needed if the pointer has
> static type D.

Or sometimes more conveniently, declaring the whole class D to be final:

   class D final : public B
   {
     public:
       void foo();
   };

(which has the advantage that it will make all methods final, even those
D doesn't override)

-miles

-- 
Accord, n. Harmony.

Thread

Virtual function call optimization cppquester <cppquester@googlemail.com> - 2011-09-25 05:42 -0700
  Re: Virtual function call optimization Leigh Johnston <leigh@i42.co.uk> - 2011-09-25 14:45 +0100
  Re: Virtual function call optimization Victor Bazarov <v.bazarov@comcast.invalid> - 2011-09-25 09:46 -0400
    Re: Virtual function call optimization cppquester <cppquester@googlemail.com> - 2011-09-25 20:24 -0700
      Re: Virtual function call optimization Victor Bazarov <v.bazarov@comcast.invalid> - 2011-09-26 08:51 -0400
        Re: Virtual function call optimization cppquester <cppquester@googlemail.com> - 2011-09-26 07:38 -0700
          Re: Virtual function call optimization "Kevin P. Fleming" <news@kpfleming.us> - 2011-09-26 09:59 -0500
            Re: Virtual function call optimization cppquester <cppquester@googlemail.com> - 2011-09-26 08:43 -0700
              Re: Virtual function call optimization Paavo Helde <myfirstname@osa.pri.ee> - 2011-09-26 11:51 -0500
                Re: Virtual function call optimization cppquester <cppquester@googlemail.com> - 2011-09-26 11:25 -0700
                Re: Virtual function call optimization Paavo Helde <myfirstname@osa.pri.ee> - 2011-09-26 14:48 -0500
                Re: Virtual function call optimization Richard Damon <news.x.richarddamon@xoxy.net> - 2011-09-26 19:42 -0400
                Re: Virtual function call optimization Miles Bader <miles@gnu.org> - 2011-09-27 13:47 +0900
  Re: Virtual function call optimization Miles Bader <miles@gnu.org> - 2011-09-25 22:58 +0900

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