Groups > comp.lang.c++ > #119559

Re: How to implement Foo:swap

From	Andrey Tarasevich <andreytarasevich@hotmail.com>
Newsgroups	comp.lang.c++
Subject	Re: How to implement Foo:swap
Date	2024-06-28 15:23 -0700
Organization	A noiseless patient Spider
Message-ID	<v5nd4e$3hok3$1@dont-email.me> (permalink)
References	<007640d1cb118697d04d54163e74b744fbea7cfb.camel@gmail.com> <v5lh80$36bet$1@dont-email.me> <v5lrh3$38ogd$1@raubtier-asyl.eternal-september.org> <v5mol0$3dlqi$1@dont-email.me> <v5nb8t$3hce3$1@raubtier-asyl.eternal-september.org>

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On 06/28/24 2:51 PM, Bonita Montero wrote:
> Am 28.06.2024 um 18:33 schrieb Andrey Tarasevich:
> 
>> Yes, there kinda-sorta is a "need for a friend", if you take into 
>> account the fact that the OP is actually defining a class _template_ 
>> `Foo<T>. There's no visible reason why `Foo` is a template in the OP's 
>> code snippet, but if they want a template - so be it.
> 
> friend is unnecessary or you want to make a swap from a Foo
> with a different type to be a friend to another Foo's type.

One more time: `friend` is absolutely necessary in order to make the 
language automatically generate a freestanding _non-template_ `swap` 
function for each specialization of `Foo<T>`.

As I already stated above, the language provides no other syntax for 
achieving this objective besides the one based on `friend`.

-- 
Best regards,
Andrey

Thread

How to implement Foo:swap wij <wyniijj5@gmail.com> - 2024-06-28 01:42 +0800
  Re: How to implement Foo:swap Bonita Montero <Bonita.Montero@gmail.com> - 2024-06-27 19:53 +0200
    Re: How to implement Foo:swap Bonita Montero <Bonita.Montero@gmail.com> - 2024-06-27 19:57 +0200
  Re: How to implement Foo:swap red floyd <no.spam.here@its.invalid> - 2024-06-27 14:02 -0700
    Re: How to implement Foo:swap wij <wyniijj5@gmail.com> - 2024-06-28 08:51 +0800
      Re: How to implement Foo:swap red floyd <no.spam.here@its.invalid> - 2024-06-27 21:46 -0700
      Re: How to implement Foo:swap red floyd <no.spam.here@its.invalid> - 2024-06-27 21:53 -0700
      Re: How to implement Foo:swap Andrey Tarasevich <andreytarasevich@hotmail.com> - 2024-06-28 11:04 -0700
  Re: How to implement Foo:swap Paavo Helde <eesnimi@osa.pri.ee> - 2024-06-28 00:04 +0300
  Re: How to implement Foo:swap Andrey Tarasevich <andreytarasevich@hotmail.com> - 2024-06-27 22:21 -0700
    Re: How to implement Foo:swap Bonita Montero <Bonita.Montero@gmail.com> - 2024-06-28 10:16 +0200
      Re: How to implement Foo:swap Andrey Tarasevich <andreytarasevich@hotmail.com> - 2024-06-28 09:33 -0700
        Re: How to implement Foo:swap Bonita Montero <Bonita.Montero@gmail.com> - 2024-06-28 23:51 +0200
          Re: How to implement Foo:swap Andrey Tarasevich <andreytarasevich@hotmail.com> - 2024-06-28 15:23 -0700
            Re: How to implement Foo:swap Bonita Montero <Bonita.Montero@gmail.com> - 2024-06-29 12:12 +0200
              Re: How to implement Foo:swap Bonita Montero <Bonita.Montero@gmail.com> - 2024-06-29 15:03 +0200
                Re: How to implement Foo:swap Andrey Tarasevich <andreytarasevich@hotmail.com> - 2024-06-29 08:59 -0700
                Re: How to implement Foo:swap Bonita Montero <Bonita.Montero@gmail.com> - 2024-06-29 19:04 +0200
                Re: How to implement Foo:swap Andrey Tarasevich <andreytarasevich@hotmail.com> - 2024-06-29 10:27 -0700
                Re: How to implement Foo:swap Bonita Montero <Bonita.Montero@gmail.com> - 2024-06-29 19:52 +0200
                Re: How to implement Foo:swap "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-06-29 12:33 -0700
                Re: How to implement Foo:swap "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-06-29 12:34 -0700
                Re: How to implement Foo:swap Richard Damon <richard@damon-family.org> - 2024-06-29 16:13 -0400
                Re: How to implement Foo:swap "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-06-29 13:52 -0700
                Re: How to implement Foo:swap Bonita Montero <Bonita.Montero@gmail.com> - 2024-06-30 00:38 +0200
                Re: How to implement Foo:swap "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-06-29 18:09 -0700
                Re: How to implement Foo:swap Bonita Montero <Bonita.Montero@gmail.com> - 2024-06-29 19:22 +0200
                Re: How to implement Foo:swap Andrey Tarasevich <andreytarasevich@hotmail.com> - 2024-06-29 10:43 -0700
                Re: How to implement Foo:swap Bonita Montero <Bonita.Montero@gmail.com> - 2024-06-29 19:49 +0200
                Re: How to implement Foo:swap Andrey Tarasevich <andreytarasevich@hotmail.com> - 2024-06-29 11:03 -0700
                Re: How to implement Foo:swap Bonita Montero <Bonita.Montero@gmail.com> - 2024-06-29 20:08 +0200
                Re: How to implement Foo:swap Andrey Tarasevich <andreytarasevich@hotmail.com> - 2024-06-29 11:24 -0700
                Re: How to implement Foo:swap Bonita Montero <Bonita.Montero@gmail.com> - 2024-06-29 20:46 +0200
                Re: How to implement Foo:swap Andrey Tarasevich <andreytarasevich@hotmail.com> - 2024-06-29 20:48 -0700
              Re: How to implement Foo:swap Andrey Tarasevich <andreytarasevich@hotmail.com> - 2024-06-29 08:55 -0700
                Re: How to implement Foo:swap Bonita Montero <Bonita.Montero@gmail.com> - 2024-06-29 19:05 +0200
                Re: How to implement Foo:swap Andrey Tarasevich <andreytarasevich@hotmail.com> - 2024-06-29 10:35 -0700
              Re: How to implement Foo:swap Andrey Tarasevich <andreytarasevich@hotmail.com> - 2024-06-29 09:15 -0700
    Re: How to implement Foo:swap Marcel Mueller <news.5.maazl@spamgourmet.org> - 2024-07-15 20:33 +0200
      Re: How to implement Foo:swap Andrey Tarasevich <andreytarasevich@hotmail.com> - 2024-07-15 20:04 -0700
        Re: How to implement Foo:swap Marcel Mueller <news.5.maazl@spamgourmet.org> - 2024-07-20 13:19 +0200
          Re: How to implement Foo:swap Andrey Tarasevich <andreytarasevich@hotmail.com> - 2024-07-20 20:18 -0700

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