Re: "Performance of C++20's Ranges"

From	Juha Nieminen <nospam@thanks.invalid>
Newsgroups	comp.lang.c++
Subject	Re: "Performance of C++20's Ranges"
Date	2022-04-28 06:45 +0000
Organization	Aioe.org NNTP Server
Message-ID	<t4dd5c$1nkb$1@gioia.aioe.org> (permalink)
References	(1 earlier) <t48d7a$u9o$1@gioia.aioe.org> <t48epq$rh4$1@dont-email.me> <t48k16$7a5$1@gioia.aioe.org> <t4aud3$1euh$1@gioia.aioe.org> <t4bmh5$sqd$1@dont-email.me>

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James Kuyper <jameskuyper@alumni.caltech.edu> wrote:
> The committee isn't responsible for implementing the C++ standard
> library. Oddly enough, that's the responsibility of the implementor.
> While implementors can occasionally make idiotic mistakes, just like any
> other programmer, their work (especially in the case of popular
> implementations) gets a lot of real-life testing, and when it doesn't
> work right, people complain back to the implementors. As a result,
> popular C and C++ implementations have a definite tendency to be among
> the most reliable software in the world. You should think twice about
> wasting your time duplicating their efforts with code that will never be
> anywhere near as heavily tested as theirs is.

Although, to be fair, sometimes the standard can be slightly vague and
ambiguous, and different standard library implementors can have different
interpretations and thus different implementations.

Something like a year ago I made a bug report to the glibc developers.
As I read the C standard I think it's almost completely clear that the
swprintf() function should output an ending null character even if the
destination is too short to contain the entire would-be output (in the
exact same way as snprintf does. In other words swprintf() should behave
exactly like snprintf(), except that it deals with wide characters.)

For some reason the glibc developers have interpreted the C standard
in such a way that when it comes to swprintf(), it doesn't have to
output the ending null character if the destination is too short.
I don't see how this can be concluded from the C standard, so I sent
the bug report about a year ago.

It has had no reaction whatsoever from them.

Thread

"Performance of C++20's Ranges" Cholo Lennon <chololennon@hotmail.com> - 2022-04-26 01:13 -0300
  Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-26 09:15 +0000
    Re: "Performance of C++20's Ranges" Juha Nieminen <nospam@thanks.invalid> - 2022-04-26 09:27 +0000
      Re: "Performance of C++20's Ranges" Manfred <noname@add.invalid> - 2022-04-26 16:29 +0200
        Re: "Performance of C++20's Ranges" "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2022-05-01 18:45 -0700
    Re: "Performance of C++20's Ranges" "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2022-04-26 11:42 +0200
      Re: "Performance of C++20's Ranges" Juha Nieminen <nospam@thanks.invalid> - 2022-04-26 11:11 +0000
        Re: "Performance of C++20's Ranges" "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2022-04-26 13:31 +0200
        Re: "Performance of C++20's Ranges" Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2022-04-26 06:46 -0700
        Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-27 08:20 +0000
          Re: "Performance of C++20's Ranges" Juha Nieminen <nospam@thanks.invalid> - 2022-04-27 08:40 +0000
            Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-27 15:12 +0000
              Re: "Performance of C++20's Ranges" scott@slp53.sl.home (Scott Lurndal) - 2022-04-27 16:09 +0000
                Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-27 16:21 +0000
                Re: "Performance of C++20's Ranges" Tim Rentsch <tr.17687@z991.linuxsc.com> - 2022-04-29 16:15 -0700
                Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-30 16:00 +0000
            Re: "Performance of C++20's Ranges" Bonita Montero <Bonita.Montero@gmail.com> - 2022-04-27 19:03 +0200
          Re: "Performance of C++20's Ranges" James Kuyper <jameskuyper@alumni.caltech.edu> - 2022-04-27 11:12 -0400
            Re: "Performance of C++20's Ranges" Juha Nieminen <nospam@thanks.invalid> - 2022-04-28 06:45 +0000
      Re: "Performance of C++20's Ranges" Juha Nieminen <nospam@thanks.invalid> - 2022-04-27 06:30 +0000
        Re: "Performance of C++20's Ranges" Manfred <noname@add.invalid> - 2022-04-28 23:57 +0200
          Re: "Performance of C++20's Ranges" Juha Nieminen <nospam@thanks.invalid> - 2022-04-29 06:07 +0000
        Re: "Performance of C++20's Ranges" Tim Rentsch <tr.17687@z991.linuxsc.com> - 2022-04-29 16:28 -0700
          Re: "Performance of C++20's Ranges" Juha Nieminen <nospam@thanks.invalid> - 2022-05-02 05:01 +0000
            Re: "Performance of C++20's Ranges" Tim Rentsch <tr.17687@z991.linuxsc.com> - 2022-05-10 07:36 -0700
    Re: "Performance of C++20's Ranges" James Kuyper <jameskuyper@alumni.caltech.edu> - 2022-04-26 11:28 -0400
      Re: "Performance of C++20's Ranges" Manfred <noname@add.invalid> - 2022-04-26 18:13 +0200
      Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-26 16:24 +0000
        Re: "Performance of C++20's Ranges" James Kuyper <jameskuyper@alumni.caltech.edu> - 2022-04-26 12:48 -0400
    Re: "Performance of C++20's Ranges" Cholo Lennon <chololennon@hotmail.com> - 2022-04-26 20:20 -0300
      Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-27 08:30 +0000
        Re: "Performance of C++20's Ranges" Juha Nieminen <nospam@thanks.invalid> - 2022-04-27 08:50 +0000
          Re: "Performance of C++20's Ranges" Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2022-04-27 05:12 -0700
          Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-27 15:18 +0000
            Re: "Performance of C++20's Ranges" Bonita Montero <Bonita.Montero@gmail.com> - 2022-04-27 18:56 +0200
              Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-28 08:40 +0000
                Re: "Performance of C++20's Ranges" Paavo Helde <eesnimi@osa.pri.ee> - 2022-04-28 13:54 +0300
                Re: "Performance of C++20's Ranges" Bonita Montero <Bonita.Montero@gmail.com> - 2022-04-28 13:11 +0200
                Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-28 15:25 +0000
                Re: "Performance of C++20's Ranges" Bonita Montero <Bonita.Montero@gmail.com> - 2022-04-28 17:30 +0200
                Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-28 15:45 +0000
                Re: "Performance of C++20's Ranges" Bonita Montero <Bonita.Montero@gmail.com> - 2022-04-28 17:52 +0200
                Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-28 15:57 +0000
                Re: "Performance of C++20's Ranges" Bonita Montero <Bonita.Montero@gmail.com> - 2022-04-28 18:01 +0200
                Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-28 16:06 +0000
                Re: "Performance of C++20's Ranges" Bonita Montero <Bonita.Montero@gmail.com> - 2022-04-28 18:09 +0200
                Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-28 16:14 +0000
                Re: "Performance of C++20's Ranges" "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2022-04-28 16:11 -0700
                Re: "Performance of C++20's Ranges" "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2022-04-28 16:20 -0700
                Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-29 09:31 +0000
                Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-28 15:15 +0000
                Re: "Performance of C++20's Ranges" Bonita Montero <Bonita.Montero@gmail.com> - 2022-04-28 13:07 +0200
                Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-28 15:17 +0000
                Re: "Performance of C++20's Ranges" Bonita Montero <Bonita.Montero@gmail.com> - 2022-04-28 17:31 +0200
                Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-28 15:50 +0000
                Re: "Performance of C++20's Ranges" Bonita Montero <Bonita.Montero@gmail.com> - 2022-04-28 17:55 +0200
                Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-28 15:59 +0000
                Re: "Performance of C++20's Ranges" Bonita Montero <Bonita.Montero@gmail.com> - 2022-04-28 18:02 +0200
                Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-28 16:13 +0000
                Re: "Performance of C++20's Ranges" Bonita Montero <Bonita.Montero@gmail.com> - 2022-04-28 18:20 +0200
                Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-29 09:27 +0000
                Re: "Performance of C++20's Ranges" Bonita Montero <Bonita.Montero@gmail.com> - 2022-04-29 20:48 +0200
                Re: "Performance of C++20's Ranges" Bonita Montero <Bonita.Montero@gmail.com> - 2022-04-30 07:34 +0200
                Re: "Performance of C++20's Ranges" scott@slp53.sl.home (Scott Lurndal) - 2022-04-30 17:31 +0000
                Re: "Performance of C++20's Ranges" Bonita Montero <Bonita.Montero@gmail.com> - 2022-04-30 20:30 +0200
                Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-05-01 15:20 +0000
                Re: "Performance of C++20's Ranges" Bonita Montero <Bonita.Montero@gmail.com> - 2022-05-01 18:18 +0200
                Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-05-01 16:25 +0000
                Re: "Performance of C++20's Ranges" scott@slp53.sl.home (Scott Lurndal) - 2022-05-01 23:14 +0000
                Re: "Performance of C++20's Ranges" "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2022-05-01 18:52 -0700
                Re: "Performance of C++20's Ranges" scott@slp53.sl.home (Scott Lurndal) - 2022-04-28 18:21 +0000
                Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-29 09:29 +0000
                Re: "Performance of C++20's Ranges" scott@slp53.sl.home (Scott Lurndal) - 2022-04-28 18:19 +0000
                Re: "Performance of C++20's Ranges" Bonita Montero <Bonita.Montero@gmail.com> - 2022-04-28 21:01 +0200
                Re: "Performance of C++20's Ranges" "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2022-04-28 16:07 -0700
                Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-28 15:22 +0000
            Re: "Performance of C++20's Ranges" Juha Nieminen <nospam@thanks.invalid> - 2022-04-28 10:57 +0000
              Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-28 15:27 +0000
              Re: "Performance of C++20's Ranges" red floyd <no.spam.here@its.invalid> - 2022-04-28 09:26 -0700
        Re: "Performance of C++20's Ranges" Bonita Montero <Bonita.Montero@gmail.com> - 2022-04-27 17:07 +0200
          Re: "Performance of C++20's Ranges" Muttley@dastardlyhq.com - 2022-04-27 15:54 +0000
            Re: "Performance of C++20's Ranges" Bonita Montero <Bonita.Montero@gmail.com> - 2022-04-27 18:35 +0200

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