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Re: This code is effective for modest-sized numbers, but can you tell what it does?

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scott@slp53.sl.home (Scott Lurndal) writes:

> Tim Rentsch <tr.17687@z991.linuxsc.com> writes:
>
>> Paavo Helde <eesnimi@osa.pri.ee> writes:
>>
>>> 25.04.2022 15:27 Tim Rentsch kirjutas:
>>>
>>>> Juha Nieminen <nospam@thanks.invalid> writes:
>>>>
>>>>> Graeme C. <graec58@gmail.com> wrote:
>>>>
>>>> [...]
>>>>
>>>>>>  for (int i=0; i<vf[gen-1].size(); i++) { // from previous gen
>>>>>
>>>>> std::vector::size() returns a value of type std::size_t.  You
>>>>> shouldn't be using an int with it.
>>>>
>>>> I don't want to start a holy war, but in this particular case
>>>> there is no problem comparing a signed type to a size_t (which is
>>>> an unsigned type).
>>>
>>> I don't really care if such code uses signed or unsigned types.
>>> However, there is a problem when comparing signed and unsigned
>>> types, namely the gcc compiler issues warnings for them with -Wall,
>>> and sometimes these warnings are actually useful.
>>
>> IME these warnings from gcc give false positives too often to
>> be used on every single compile.  Of course it can be useful
>> to turn them on now and then, to make sure nothing is askew,
>> but trying to avoid them even in all the false positive cases
>> is IMO more trouble than it is worth.
>
> I beg to differ.  We include -Wall and -Werror on all compiles
> (well over 2 million lines of C/C++).

This sounds like you are offering an implicit argument that
because your group does it all the time it follows that it's
a good idea.  I don't find such an argument convincing in any
way.

> It is far too common for C programmers to use 'int' when
> the domain of the value doesn't include negative numbers.

Such cases would still be caught if the signed/unsigned warnings
were turned on only before every code review rather than on every
single compile.

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This code is effective for modest-sized numbers, but can you tell what it does? "Graeme C." <graec58@gmail.com> - 2022-04-22 04:41 -0700
  Re: This code is effective for modest-sized numbers, but can you tell what it does? Christian Gollwitzer <auriocus@gmx.de> - 2022-04-22 17:19 +0200
    Re: This code is effective for modest-sized numbers, but can you tell what it does? "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2022-04-22 17:42 +0200
      Re: This code is effective for modest-sized numbers, but can you tell what it does? red floyd <no.spam.here@its.invalid> - 2022-04-22 09:16 -0700
  Re: This code is effective for modest-sized numbers, but can you tell what it does? Frederick Gotham <cauldwell.thomas@gmail.com> - 2022-04-22 09:22 -0700
    Re: This code is effective for modest-sized numbers, but can you tell what it does? "Graeme C." <graec58@gmail.com> - 2022-04-22 10:24 -0700
      Re: This code is effective for modest-sized numbers, but can you tell what it does? Christian Gollwitzer <auriocus@gmx.de> - 2022-04-22 20:33 +0200
        Re: This code is effective for modest-sized numbers, but can you tell what it does? "Graeme C." <graec58@gmail.com> - 2022-04-22 17:57 -0700
  Re: This code is effective for modest-sized numbers, but can you tell what it does? Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-04-22 19:18 -0700
    Re: This code is effective for modest-sized numbers, but can you tell what it does? "Graeme C." <graec58@gmail.com> - 2022-04-22 19:40 -0700
      Re: This code is effective for modest-sized numbers, but can you tell what it does? Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-04-22 20:00 -0700
        Re: This code is effective for modest-sized numbers, but can you tell what it does? "Graeme C." <graec58@gmail.com> - 2022-04-23 04:21 -0700
  Re: This code is effective for modest-sized numbers, but can you tell what it does? Juha Nieminen <nospam@thanks.invalid> - 2022-04-25 05:48 +0000
    Re: This code is effective for modest-sized numbers, but can you tell what it does? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2022-04-25 05:27 -0700
      Re: This code is effective for modest-sized numbers, but can you tell what it does? Öö Tiib <ootiib@hot.ee> - 2022-04-25 05:40 -0700
        Re: This code is effective for modest-sized numbers, but can you tell what it does? Vir Campestris <vir.campestris@invalid.invalid> - 2022-04-25 16:48 +0100
          Re: This code is effective for modest-sized numbers, but can you tell what it does? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2022-04-30 03:51 -0700
            Re: This code is effective for modest-sized numbers, but can you tell what it does? Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-04-30 08:28 -0700
              Re: This code is effective for modest-sized numbers, but can you tell what it does? Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-04-30 10:30 -0700
              Re: This code is effective for modest-sized numbers, but can you tell what it does? Manfred <noname@add.invalid> - 2022-04-30 19:20 +0200
                Re: This code is effective for modest-sized numbers, but can you tell what it does? Manfred <noname@add.invalid> - 2022-04-30 23:20 +0200
                Re: This code is effective for modest-sized numbers, but can you tell what it does? Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-04-30 10:40 -0700
              Re: This code is effective for modest-sized numbers, but can you tell what it does? Manfred <noname@add.invalid> - 2022-04-30 19:12 +0200
        Re: This code is effective for modest-sized numbers, but can you tell what it does? Juha Nieminen <nospam@thanks.invalid> - 2022-04-26 05:20 +0000
          Re: This code is effective for modest-sized numbers, but can you tell what it does? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2022-04-29 16:12 -0700
      Re: This code is effective for modest-sized numbers, but can you tell what it does? Paavo Helde <eesnimi@osa.pri.ee> - 2022-04-25 15:44 +0300
        Re: This code is effective for modest-sized numbers, but can you tell what it does? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2022-05-10 07:18 -0700
          Re: This code is effective for modest-sized numbers, but can you tell what it does? scott@slp53.sl.home (Scott Lurndal) - 2022-05-10 14:34 +0000
            Re: This code is effective for modest-sized numbers, but can you tell what it does? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2022-05-24 05:43 -0700
          Re: This code is effective for modest-sized numbers, but can you tell what it does? Paavo Helde <eesnimi@osa.pri.ee> - 2022-05-10 20:34 +0300
            Re: This code is effective for modest-sized numbers, but can you tell what it does? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2022-06-04 07:57 -0700

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