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Re: What is visitor pattern?

Newsgroups comp.lang.c++
Date 2023-08-20 07:22 -0700
References <331cb164-e6b3-4f9b-af8d-ee933abd79b7n@googlegroups.com>
Message-ID <ea1ee058-e460-4e34-a001-4e9375f1a7can@googlegroups.com> (permalink)
Subject Re: What is visitor pattern?
From Öö Tiib <ootiib@hot.ee>

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On Sunday, 20 August 2023 at 16:55:56 UTC+3, wij wrote:
> I found a C++ example https://refactoring.guru/design-patterns/visitor/cpp/example 
> but I still don't understand what it tries to say and the example code don't compile. 

Racoon with buzzsaw indicates self-irony.
Example that does not compile is smelly ... OTOH it perhaps just lacks #includes.

#include <array>
#include <iostream>
#include <string>

> Can anyone explain the visitor pattern or better webpages? 

Maybe wikipedia?
<https://en.wikipedia.org/wiki/Visitor_pattern>

> probably making the example compile may help, thanks in advance.

Unsure ... people's mind does not grasp double dispatch too well.

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Thread

What is visitor pattern? wij <wyniijj5@gmail.com> - 2023-08-20 06:55 -0700
  Re: What is visitor pattern? Öö Tiib <ootiib@hot.ee> - 2023-08-20 07:22 -0700
    Re: What is visitor pattern? wij <wyniijj5@gmail.com> - 2023-08-20 19:24 -0700
    Re: What is visitor pattern? wij <wyniijj5@gmail.com> - 2023-08-27 13:13 -0700
      Re: What is visitor pattern? Öö Tiib <ootiib@hot.ee> - 2023-08-28 00:13 -0700
        Re: What is visitor pattern? wij <wyniijj5@gmail.com> - 2023-08-28 23:18 -0700
  Re: What is visitor pattern? Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2023-08-20 14:12 -0400
    Re: What is visitor pattern? Öö Tiib <ootiib@hot.ee> - 2023-08-20 13:34 -0700
      Re: What is visitor pattern? Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2023-08-20 18:01 -0400
        Re: What is visitor pattern? Öö Tiib <ootiib@hot.ee> - 2023-08-20 21:12 -0700
          Re: What is visitor pattern? Muttley@dastardlyhq.com - 2023-08-21 06:53 +0000
            Re: What is visitor pattern? Öö Tiib <ootiib@hot.ee> - 2023-08-21 00:10 -0700
              Re: What is visitor pattern? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-08-26 21:26 -0700
                Re: What is visitor pattern? Öö Tiib <ootiib@hot.ee> - 2023-08-26 22:57 -0700
                Re: What is visitor pattern? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-08-28 15:07 -0700
          Re: What is visitor pattern? Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2023-08-21 22:55 -0400
            Re: What is visitor pattern? Öö Tiib <ootiib@hot.ee> - 2023-08-21 21:56 -0700
              Re: What is visitor pattern? Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2023-08-24 01:38 -0400
                Re: What is visitor pattern? Öö Tiib <ootiib@hot.ee> - 2023-08-24 04:45 -0700
                Re: What is visitor pattern? Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2023-08-24 23:11 -0400
                Re: What is visitor pattern? Öö Tiib <ootiib@hot.ee> - 2023-08-25 07:52 -0700
                Re: What is visitor pattern? Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2023-08-26 00:55 -0400
    Re: What is visitor pattern? Bonita Montero <Bonita.Montero@gmail.com> - 2023-08-21 06:18 +0200
      Re: What is visitor pattern? Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2023-08-21 23:28 -0400
        Re: What is visitor pattern? Bonita Montero <Bonita.Montero@gmail.com> - 2023-08-22 05:47 +0200
          Re: What is visitor pattern? Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2023-08-22 00:11 -0400
            Re: What is visitor pattern? Bonita Montero <Bonita.Montero@gmail.com> - 2023-08-22 14:30 +0200
              Re: What is visitor pattern? Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2023-08-24 01:56 -0400
                Re: What is visitor pattern? Bonita Montero <Bonita.Montero@gmail.com> - 2023-08-24 09:15 +0200
                Re: What is visitor pattern? Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2023-08-24 20:02 -0400
                Re: What is visitor pattern? Bonita Montero <Bonita.Montero@gmail.com> - 2023-08-25 05:13 +0200
                Re: What is visitor pattern? Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2023-08-26 01:05 -0400
                Re: What is visitor pattern? Bonita Montero <Bonita.Montero@gmail.com> - 2023-08-26 09:24 +0200
                Re: What is visitor pattern? Muttley@dastardlyhq.com - 2023-08-26 08:01 +0000
                Re: What is visitor pattern? Bonita Montero <Bonita.Montero@gmail.com> - 2023-08-26 11:29 +0200
                Re: What is visitor pattern? Muttley@dastardlyhq.com - 2023-08-26 15:00 +0000
                Re: What is visitor pattern? Bonita Montero <Bonita.Montero@gmail.com> - 2023-08-26 17:08 +0200
                Re: What is visitor pattern? Muttley@dastardlyhq.com - 2023-08-26 15:15 +0000
                Re: What is visitor pattern? Bonita Montero <Bonita.Montero@gmail.com> - 2023-08-26 17:24 +0200
                Re: What is visitor pattern? Muttley@dastardlyhq.com - 2023-08-26 15:36 +0000
                Re: What is visitor pattern? Bonita Montero <Bonita.Montero@gmail.com> - 2023-08-26 17:39 +0200
                Re: What is visitor pattern? Bonita Montero <Bonita.Montero@gmail.com> - 2023-08-26 17:26 +0200
                Re: What is visitor pattern? Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2023-08-29 21:44 -0400
                Re: What is visitor pattern? Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2023-08-29 22:14 -0400
                Re: What is visitor pattern? Bonita Montero <Bonita.Montero@gmail.com> - 2023-08-30 06:13 +0200
                Re: What is visitor pattern? Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2023-08-30 23:18 -0400
  Re: What is visitor pattern? "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2023-08-21 01:17 +0200
    Re: What is visitor pattern? "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2023-08-21 01:24 +0200
  Re: What is visitor pattern? Michael S <already5chosen@yahoo.com> - 2023-08-25 05:21 -0700
    Re: What is visitor pattern? Bonita Montero <Bonita.Montero@gmail.com> - 2023-08-25 14:33 +0200
    Re: What is visitor pattern? Öö Tiib <ootiib@hot.ee> - 2023-08-25 08:28 -0700
    Re: What is visitor pattern? Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2023-08-26 01:17 -0400
  Re: What is visitor pattern? Bonita Montero <Bonita.Montero@gmail.com> - 2023-08-29 19:27 +0200

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