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Re: Const-qualified function return type in C - is it a part of function type?

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From Tim Rentsch <tr.17687@z991.linuxsc.com>
Newsgroups comp.lang.c
Subject Re: Const-qualified function return type in C - is it a part of function type?
Date Sat, 22 Feb 2020 10:06:32 -0800
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Ben Bacarisse <ben.usenet@bsb.me.uk> writes:

> Andrey Tarasevich <andreytarasevich@hotmail.com> writes:
> <cut>
>
>> To avoid any further wastage of time on this irrelevant matter I
>> hereby postulate one more time:  the above quoted passage refers to
>> qualifiers applied to the function type itself (which, BTW, is only
>> possible through typedef names).
>
> And interesting detail, which I can't interpret...  In all versions of
> the C standard, there is a footnote attached to the paragraph
>
>   "If the specification of an array type includes any type qualifiers,
>   the element type is so qualified, not the array type.  If the
>   specification of a function type includes any type qualifiers, the
>   behavior is undefined."
>
> In C90, this footnote seems to be:
>
>   59) Both of these can only occur through the use of typedefs.
>
> By C99 it appears to have become
>
>   118) Both of these can occur through the use of typedefs.
>
> Why the change I wonder?

I believe it was prompted by point 8 in this document, written by
Doug Gwyn (dated 1997):

    http://www.open-std.org/jtc1/sc22/wg14/www/docs/n762.htm

> Is there a way to qualify a function or array
> type without a typedef?  I can't see one.

I believe there is not.  My guess is Doug was confused about what
the footnoted sentence was meant to say, which in turn led him to
misinterpret the footnote.

> By the way, I hedge with "seems be" and "appears to have become" because
> I don't have either standard, only pre-publication drafts.  Maybe
> someone with the actual text can verify?

I believe the quotes you give match the published standards
exactly, except that the footnotes have different numbers.

Incidentally, when I say "I believe" it means I think the
statement following "believe" is true, even though I may not be
prepared to demonstrate its truth.  This is in contrast to
expressing an opinion, which is not about statements of
fact and so not subject to being disproved.

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Thread

Const-qualified function return type in C - is it a part of function type? Andrey Tarasevich <andreytarasevich@hotmail.com> - 2020-02-21 14:35 -0800
  Const-qualified function return type in C - is it a part of function type? James Kuyper <jameskuyper@alumni.caltech.edu> - 2020-02-21 15:24 -0800
    Re: Const-qualified function return type in C - is it a part of function type? Andrey Tarasevich <andreytarasevich@hotmail.com> - 2020-02-21 16:19 -0800
      Re: Const-qualified function return type in C - is it a part of function type? Richard Damon <Richard@Damon-Family.org> - 2020-02-21 20:50 -0500
        Re: Const-qualified function return type in C - is it a part of function type? Andrey Tarasevich <andreytarasevich@hotmail.com> - 2020-02-21 19:56 -0800
          Re: Const-qualified function return type in C - is it a part of function type? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2020-02-22 14:22 +0000
            Re: Const-qualified function return type in C - is it a part of function type? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2020-02-22 10:06 -0800
              Re: Const-qualified function return type in C - is it a part of function type? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2020-02-22 21:20 +0000
                Re: Const-qualified function return type in C - is it a part of function type? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2020-02-24 20:58 -0800
            Re: Const-qualified function return type in C - is it a part of function type? luser droog <luser.droog@gmail.com> - 2020-02-22 19:24 -0800
              Re: Const-qualified function return type in C - is it a part of function type? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2020-02-23 03:52 +0000
                Re: Const-qualified function return type in C - is it a part of function type? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2020-02-24 21:06 -0800
      Re: Const-qualified function return type in C - is it a part of function type? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2020-02-21 21:21 -0800
  Re: Const-qualified function return type in C - is it a part of function type? Bonita Montero <Bonita.Montero@gmail.com> - 2020-02-22 07:51 +0100
    Re: Const-qualified function return type in C - is it a part of function type? Andrey Tarasevich <andreytarasevich@hotmail.com> - 2020-02-22 05:00 -0800
      Re: Const-qualified function return type in C - is it a part of function type? Bonita Montero <Bonita.Montero@gmail.com> - 2020-02-22 16:23 +0100
      Re: Const-qualified function return type in C - is it a part of function type? Guillaume <message@bottle.org> - 2020-02-22 20:37 +0100
        Re: Const-qualified function return type in C - is it a part of function type? Bonita Montero <Bonita.Montero@gmail.com> - 2020-02-22 20:50 +0100
          Re: Const-qualified function return type in C - is it a part of function type? David Brown <david.brown@hesbynett.no> - 2020-02-23 07:29 +0100
            Re: Const-qualified function return type in C - is it a part of function type? Bonita Montero <Bonita.Montero@gmail.com> - 2020-02-23 08:57 +0100
  Re: Const-qualified function return type in C - is it a part of function type? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2020-02-22 09:53 -0800

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