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Re: Structured binding considered harmful

From Ian Collins <ian-news@hotmail.com>
Newsgroups comp.lang.c++
Subject Re: Structured binding considered harmful
Date 2020-03-17 08:17 +1300
Message-ID <hda1mgFnq38U7@mid.individual.net> (permalink)
References (1 earlier) <r4lmbv$b7h$1@news.albasani.net> <r4mcne$j8h$1@dont-email.me> <r4mv14$d1t$1@news.albasani.net> <cone.1584355585.390551.41705.1004@monster.email-scan.com> <r4o4up$osl$1@dont-email.me>

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On 17/03/2020 04:11, jacobnavia wrote:
> Le 16/03/2020 à 11:46, Sam a écrit :
>> Bonita Montero writes:
>>
>>>> Using structured binding you have to specify the number of fields of
>>>> the class and many other IRRELEVANT things that make more
>>>> dependencies that make the code more prone to failure.
>>>
>>> People who can handle C++ also can handle this.
>>
>> Furthermore, having delicate code that requires substantial work to
>> implement a tiny change is one of the key defining features of C++, and
>> this simply makes it even better.
>>
>>
> 
> That's the point.
> 
> C++ started with many good ideas like "information hiding", in the sense
> that you limit the access to irrelevant detail to specify interfaces
> that are more robust to changes in the underlying implementation.
> 
> Structured binding goes against that principle head on: you expose
> everything and any change to the implementation of the base class needs
> a rewrite of user code!

Ah but if you are using a type with named members, you wouldn't need to 
use structured binding, would you?  Structured binding is useful for 
objects with unnamed members (arrays, tuples) or objects with generic 
names (map, pair etc).

So no, structured binding is not a mistake.

-- 
Ian.

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Thread

Structured binding considered harmful jacobnavia <jacob@jacob.remcomp.fr> - 2020-03-13 00:13 +0100
  Re: Structured binding considered harmful Maciej Sobczak <see.my.homepage@gmail.com> - 2020-03-13 00:46 -0700
    Re: Structured binding considered harmful jacobnavia <jacob@jacob.remcomp.fr> - 2020-03-14 09:10 +0100
  Re: Structured binding considered harmful Öö Tiib <ootiib@hot.ee> - 2020-03-13 09:40 -0700
    Re: Structured binding considered harmful jacobnavia <jacob@jacob.remcomp.fr> - 2020-03-14 09:05 +0100
      Re: Structured binding considered harmful Öö Tiib <ootiib@hot.ee> - 2020-03-14 03:19 -0700
        Re: Structured binding considered harmful Jorgen Grahn <grahn+nntp@snipabacken.se> - 2020-03-15 11:08 +0000
          Re: Structured binding considered harmful Öö Tiib <ootiib@hot.ee> - 2020-03-15 09:46 -0700
            Re: Structured binding considered harmful "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2020-03-15 19:27 +0100
              Re: Structured binding considered harmful Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2020-03-15 15:15 -0700
                Re: Structured binding considered harmful "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2020-03-16 05:23 +0100
                Re: Structured binding considered harmful "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2020-03-16 05:54 +0100
              Re: Structured binding considered harmful Öö Tiib <ootiib@hot.ee> - 2020-03-16 00:20 -0700
  Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-13 23:08 -0400
    Re: Structured binding considered harmful jacobnavia <jacob@jacob.remcomp.fr> - 2020-03-14 08:59 +0100
      Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-14 10:09 -0400
        Re: Structured binding considered harmful jacobnavia <jacob@jacob.remcomp.fr> - 2020-03-14 18:32 +0100
          Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-14 18:33 -0400
  Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-15 17:50 +0100
    Re: Structured binding considered harmful jacobnavia <jacob@jacob.remcomp.fr> - 2020-03-16 00:11 +0100
      Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-16 05:24 +0100
        Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-16 06:46 -0400
          Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-16 12:52 +0100
            Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-16 08:32 -0400
              Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-16 13:51 +0100
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-16 20:06 -0400
                Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-17 06:37 +0100
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-17 07:17 -0400
                Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-17 18:37 +0100
                Re: Structured binding considered harmful "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2020-03-17 18:50 +0100
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-18 06:30 -0400
                Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-18 11:38 +0100
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-18 08:17 -0400
                Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-18 13:19 +0100
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-18 08:31 -0400
                Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-18 14:15 +0100
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-18 10:13 -0400
                Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-18 15:45 +0100
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-18 11:36 -0400
                Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-18 17:59 +0100
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-18 13:18 -0400
                Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-18 18:27 +0100
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-18 14:41 -0400
                Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-18 19:46 +0100
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-18 19:46 -0400
                Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-19 06:41 +0100
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-19 07:02 -0400
                Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-19 12:41 +0100
                Re: Structured binding considered harmful Öö Tiib <ootiib@hot.ee> - 2020-03-19 06:10 -0700
                Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-19 14:15 +0100
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-19 19:23 -0400
                Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-20 09:18 +0100
                Re: Structured binding considered harmful James Kuyper <jameskuyper@alumni.caltech.edu> - 2020-03-20 05:31 -0700
                Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-20 13:40 +0100
                Re: Structured binding considered harmful Öö Tiib <ootiib@hot.ee> - 2020-03-20 08:50 -0700
                Re: Structured binding considered harmful Daniel <danielaparker@gmail.com> - 2020-03-20 09:30 -0700
                Re: Structured binding considered harmful Öö Tiib <ootiib@hot.ee> - 2020-03-20 10:13 -0700
                Re: Structured binding considered harmful Daniel <danielaparker@gmail.com> - 2020-03-20 10:36 -0700
                Re: Structured binding considered harmful Ian Collins <ian-news@hotmail.com> - 2020-03-21 12:06 +1300
                Re: Structured binding considered harmful Öö Tiib <ootiib@hot.ee> - 2020-03-20 16:37 -0700
                Re: Structured binding considered harmful Daniel <danielaparker@gmail.com> - 2020-03-20 17:17 -0700
                Re: Structured binding considered harmful Öö Tiib <ootiib@hot.ee> - 2020-03-21 10:09 -0700
                Re: Structured binding considered harmful Daniel <danielaparker@gmail.com> - 2020-03-21 11:21 -0700
                Re: Structured binding considered harmful Öö Tiib <ootiib@hot.ee> - 2020-03-21 13:09 -0700
                Re: Structured binding considered harmful Jorgen Grahn <grahn+nntp@snipabacken.se> - 2020-03-21 22:33 +0000
                Re: Structured binding considered harmful Jorgen Grahn <grahn+nntp@snipabacken.se> - 2020-03-20 17:30 +0000
                Re: Structured binding considered harmful Daniel <danielaparker@gmail.com> - 2020-03-20 10:49 -0700
                Re: Structured binding considered harmful Jorgen Grahn <grahn+nntp@snipabacken.se> - 2020-03-20 18:47 +0000
                Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-20 17:41 +0100
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-20 18:06 -0400
                Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-21 06:31 +0100
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-21 09:50 -0400
                Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-21 14:59 +0100
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-21 10:42 -0400
                Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-21 16:09 +0100
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-21 11:12 -0400
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-20 18:05 -0400
                Re: Structured binding considered harmful Daniel <danielaparker@gmail.com> - 2020-03-20 15:57 -0700
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-20 23:23 -0400
                Re: Structured binding considered harmful Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2020-03-20 21:08 -0700
                Re: Structured binding considered harmful Ralf Goertz <me@myprovider.invalid> - 2020-03-21 08:24 +0100
                Re: Structured binding considered harmful Daniel <danielaparker@gmail.com> - 2020-03-21 01:36 -0700
                Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-21 06:30 +0100
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-21 09:51 -0400
                Re: Structured binding considered harmful jacobnavia <jacob@jacob.remcomp.fr> - 2020-03-22 13:22 +0100
                Re: Structured binding considered harmful Jorgen Grahn <grahn+nntp@snipabacken.se> - 2020-03-22 13:24 +0000
                Re: Structured binding considered harmful James Kuyper <jameskuyper@alumni.caltech.edu> - 2020-03-22 06:32 -0700
                Re: Structured binding considered harmful Daniel <danielaparker@gmail.com> - 2020-03-22 07:59 -0700
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-22 13:02 -0400
                Re: Structured binding considered harmful Melzzzzz <Melzzzzz@zzzzz.com> - 2020-03-22 17:09 +0000
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-22 13:35 -0400
                Re: Structured binding considered harmful Melzzzzz <Melzzzzz@zzzzz.com> - 2020-03-22 17:54 +0000
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-22 17:19 -0400
                Re: Structured binding considered harmful Melzzzzz <Melzzzzz@zzzzz.com> - 2020-03-22 21:46 +0000
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-22 19:06 -0400
                Re: Structured binding considered harmful danielaparker@gmail.com - 2020-03-22 17:11 -0700
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-22 22:16 -0400
                Re: Structured binding considered harmful Chris Vine <chris@cvine--nospam--.freeserve.co.uk> - 2020-03-25 20:38 +0000
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-25 20:01 -0400
                Re: Structured binding considered harmful danielaparker@gmail.com - 2020-03-22 10:58 -0700
                Re: Structured binding considered harmful Ian Collins <ian-news@hotmail.com> - 2020-03-23 07:41 +1300
                Re: Structured binding considered harmful James Kuyper <jameskuyper@alumni.caltech.edu> - 2020-03-22 15:01 -0400
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-22 10:24 -0400
                Re: Structured binding considered harmful James Kuyper <jameskuyper@alumni.caltech.edu> - 2020-03-20 20:15 -0700
                Re: Structured binding considered harmful jacobnavia <jacob@jacob.remcomp.fr> - 2020-03-21 08:32 +0100
                Re: Structured binding considered harmful David Brown <david.brown@hesbynett.no> - 2020-03-21 11:27 +0100
                Re: Structured binding considered harmful Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2020-03-21 13:34 +0000
                Re: Structured binding considered harmful Daniel <danielaparker@gmail.com> - 2020-03-21 07:11 -0700
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-21 10:45 -0400
                Re: Structured binding considered harmful Daniel <danielaparker@gmail.com> - 2020-03-21 08:03 -0700
                Re: Structured binding considered harmful Daniel <danielaparker@gmail.com> - 2020-03-19 08:24 -0700
                Re: Structured binding considered harmful Ian Collins <ian-news@hotmail.com> - 2020-03-19 09:05 +1300
                Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-18 19:47 -0400
                Re: Structured binding considered harmful James Kuyper <jameskuyper@alumni.caltech.edu> - 2020-03-18 11:43 -0700
                Re: Structured binding considered harmful Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-18 19:48 +0100
                Re: Structured binding considered harmful James Kuyper <jameskuyper@alumni.caltech.edu> - 2020-03-18 12:37 -0700
          Re: Structured binding considered harmful jacobnavia <jacob@jacob.remcomp.fr> - 2020-03-16 16:11 +0100
            Re: Structured binding considered harmful Ian Collins <ian-news@hotmail.com> - 2020-03-17 08:17 +1300
            Re: Structured binding considered harmful Daniel <danielaparker@gmail.com> - 2020-03-16 13:12 -0700
            Re: Structured binding considered harmful Sam <sam@email-scan.com> - 2020-03-16 20:13 -0400
  Re: Structured binding considered harmful Melzzzzz <Melzzzzz@zzzzz.com> - 2020-03-17 19:46 +0000
    Re: Structured binding considered harmful Daniel <danielaparker@gmail.com> - 2020-03-21 01:43 -0700

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