Re: duct typing and interface in C++

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From	Thomas Boell <tboell@domain.invalid>
Newsgroups	comp.lang.c++
Subject	Re: duct typing and interface in C++
Date	Mon, 25 Jul 2011 02:05:58 +0200
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On Sun, 24 Jul 2011 17:40:02 +0200
TP <Tribulations@Paralleles.invalid> wrote:

> Hello,
> 
> I convert a Python/Qt program (PyQt) in C++/Qt.
> The programmer has used the duck typing of Python, thus I would like to have 
> duck typing in C++, in fact exactly what is described in the "best answer" 
> at the following address:
> 
> http://stackoverflow.com/questions/289176/how-is-duck-typing-different-from-
> the-old-variant-type-and-or-interfaces
> 
> (the "best answer" is the second post of the page, the one with a green 
> sign).
> 
> Is it possible in C++?

Well you could create something where you basically stuff your function
pointers into a std::map (similar in use to a hash), then look them up
by name and call them.

This way, the compiler will not be able to tell you if you make a typo.
The call will then fail (i. e. segfault) at runtime. 

If that's what you want...

Thread

duct typing and interface in C++ TP <Tribulations@Paralleles.invalid> - 2011-07-24 17:40 +0200
  Re: duct typing and interface in C++ Alain Ketterlin <alain@dpt-info.u-strasbg.fr> - 2011-07-24 18:11 +0200
    Re: duct typing and interface in C++ Marcel Müller <news.5.maazl@spamgourmet.org> - 2011-07-25 00:03 +0200
      Re: duct typing and interface in C++ Alain Ketterlin <alain@dpt-info.u-strasbg.fr> - 2011-07-25 10:11 +0200
      Re: duct typing and interface in C++ Goran <goran.pusic@gmail.com> - 2011-07-25 04:18 -0700
  Re: duct typing and interface in C++ Nobody <nobody@nowhere.com> - 2011-07-24 17:39 +0100
    Re: duct typing and interface in C++ TP <Tribulations@Paralleles.invalid> - 2011-07-24 19:55 +0200
      Re: duct typing and interface in C++ Alain Ketterlin <alain@dpt-info.u-strasbg.fr> - 2011-07-24 20:11 +0200
        Re: duct typing and interface in C++ TP <Tribulations@Paralleles.invalid> - 2011-07-24 20:23 +0200
          Re: duct typing and interface in C++ Dombo <dombo@disposable.invalid> - 2011-07-24 20:45 +0200
          Re: duct typing and interface in C++ Alain Ketterlin <alain@dpt-info.u-strasbg.fr> - 2011-07-24 21:10 +0200
          Re: duct typing and interface in C++ Nobody <nobody@nowhere.com> - 2011-07-24 21:21 +0100
            Re: duct typing and interface in C++ TP <Tribulations@Paralleles.invalid> - 2011-07-24 23:50 +0200
              Re: duct typing and interface in C++ Stuart Redmann <DerTopper@web.de> - 2011-07-24 23:33 -0700
                Re: duct typing and interface in C++ TP <Tribulations@Paralleles.invalid> - 2011-07-25 23:00 +0200
              Re: duct typing and interface in C++ Paavo Helde <myfirstname@osa.pri.ee> - 2011-07-25 01:35 -0500
              Re: duct typing and interface in C++ Goran <goran.pusic@gmail.com> - 2011-07-25 04:10 -0700
          Re: duct typing and interface in C++ James Kanze <james.kanze@gmail.com> - 2011-07-30 11:51 -0700
      Re: duct typing and interface in C++ Dombo <dombo@disposable.invalid> - 2011-07-24 20:21 +0200
        Re: duct typing and interface in C++ Dombo <dombo@disposable.invalid> - 2011-07-24 20:26 +0200
  Re: duct typing and interface in C++ Dombo <dombo@disposable.invalid> - 2011-07-24 18:36 +0200
    Re: duct typing and interface in C++ BGB <cr88192@hotmail.com> - 2011-07-24 10:02 -0700
  Re: duct typing and interface in C++ BGB <cr88192@hotmail.com> - 2011-07-24 09:45 -0700
    Re: duct typing and interface in C++ TP <Tribulations@Paralleles.invalid> - 2011-07-24 20:15 +0200
      Re: duct typing and interface in C++ BGB <cr88192@hotmail.com> - 2011-07-24 14:06 -0700
  Re: duct typing and interface in C++ Thomas Boell <tboell@domain.invalid> - 2011-07-25 02:05 +0200
  Re: duct typing and interface in C++ Qi <no@no.no> - 2011-07-25 09:54 +0800
  Re: duct typing and interface in C++ Werner Erasmus <werasm@gmail.com> - 2011-07-25 23:36 +0200
    Re: duct typing and interface in C++ Leigh Johnston <leigh@i42.co.uk> - 2011-07-25 23:22 +0100
      Re: duct typing and interface in C++ Werner Erasmus <werasm@gmail.com> - 2011-07-26 08:35 +0200

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