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Groups > comp.lang.c > #167709

Re: Cake - C23 to C99 transpiler

From Tim Rentsch <tr.17687@z991.linuxsc.com>
Newsgroups comp.lang.c
Subject Re: Cake - C23 to C99 transpiler
Date 2022-09-14 06:45 -0700
Organization A noiseless patient Spider
Message-ID <86y1umm5mf.fsf@linuxsc.com> (permalink)
References (8 earlier) <87leqv87t2.fsf@bsb.me.uk> <tfahhl$h2r$1@gioia.aioe.org> <tfan7d$9r5q$1@dont-email.me> <878rmv810h.fsf@bsb.me.uk> <8735d3kk1p.fsf@nosuchdomain.example.com>

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Keith Thompson <Keith.S.Thompson+u@gmail.com> writes:

> Ben Bacarisse <ben.usenet@bsb.me.uk> writes:
>
>> David Brown <david.brown@hesbynett.no> writes:
>>
>>> I believe (but I might have this wrong) that the use of dollar signs
>>> in identifiers is undefined behaviour according to the standard.
>>
>> I don't think it's undefined.  Recent C drafts permit "other
>> implementation defined characters" in the syntax, so I'm not sure how it
>> could be undefined.
>
> Right.  So if the implementation defines identifier-nondigit to include
> '$', then using '$' in an identifier is well defined;  if it doesn't,
> it's simply a syntax error.
>
>> The C23 draft permits an XID_Start character followed by XID_Continue
>> characters.  These may, in fact, include $ but I got lost down the
>> rabbit hole of referenced standards so I can't be sure.
>
> I don't believe '$' is included in XID_Start or XID_Continue, but I'm
> not 100% certain of that.
>
> https://unicode.org/reports/tr31/
> https://unicode.org/reports/tr44/

In addition to these documents I have done some web searching,
and I think the evidence is pretty strong that neither '$' nor
'@' is in XID_Start or XID_Continue, as the Unicode documentation
details them.

Editorial comment:  the two Unicode reference documents may be
the very worst reference documentation I have ever read.

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Thread

Cake -  C23 to C99 transpiler Thiago Adams <thiago.adams@gmail.com> - 2022-08-18 18:44 -0700
  Re: Cake - C23 to C99 transpiler Blue-Maned_Hawk <bluemanedhawk@example.invalid> - 2022-09-06 02:48 -0400
    Re: Cake - C23 to C99 transpiler Thiago Adams <thiago.adams@gmail.com> - 2022-09-06 10:08 -0700
      Re: Cake - C23 to C99 transpiler Vir Campestris <vir.campestris@invalid.invalid> - 2022-09-07 12:27 +0100
        Re: Cake - C23 to C99 transpiler Thiago Adams <thiago.adams@gmail.com> - 2022-09-07 05:45 -0700
          Re: Cake - C23 to C99 transpiler Bart <bc@freeuk.com> - 2022-09-07 15:35 +0100
            Re: Cake - C23 to C99 transpiler Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-09-07 16:38 +0100
              Re: Cake - C23 to C99 transpiler Bart <bc@freeuk.com> - 2022-09-07 17:04 +0100
                Re: Cake - C23 to C99 transpiler Anton Shepelev <anton.txt@g{oogle}mail.com> - 2022-09-07 19:14 +0300
                Re: Cake - C23 to C99 transpiler Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-09-07 17:31 +0100
                Re: Cake - C23 to C99 transpiler Bart <bc@freeuk.com> - 2022-09-07 17:40 +0100
                Re: Cake - C23 to C99 transpiler Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-09-07 17:49 +0100
                Re: Cake - C23 to C99 transpiler Bart <bc@freeuk.com> - 2022-09-07 19:27 +0100
                Re: Cake - C23 to C99 transpiler Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-09-07 20:02 +0100
                Re: Cake - C23 to C99 transpiler Bart <bc@freeuk.com> - 2022-09-07 21:03 +0100
                Re: Cake - C23 to C99 transpiler Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-09-07 13:52 -0700
                Re: Cake - C23 to C99 transpiler Tim Rentsch <tr.17687@z991.linuxsc.com> - 2022-09-14 07:14 -0700
                Re: Cake - C23 to C99 transpiler Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-09-14 10:59 -0700
                Re: Cake - C23 to C99 transpiler Tim Rentsch <tr.17687@z991.linuxsc.com> - 2022-09-15 23:46 -0700
                Re: Cake - C23 to C99 transpiler David Brown <david.brown@hesbynett.no> - 2022-09-07 20:17 +0200
                Re: Cake - C23 to C99 transpiler Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-09-07 19:58 +0100
                Re: Cake - C23 to C99 transpiler Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-09-07 13:26 -0700
                Re: Cake - C23 to C99 transpiler Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-09-07 23:42 +0100
                Re: Cake - C23 to C99 transpiler Tim Rentsch <tr.17687@z991.linuxsc.com> - 2022-09-14 06:45 -0700
                Re: Cake - C23 to C99 transpiler Tim Rentsch <tr.17687@z991.linuxsc.com> - 2022-09-14 06:40 -0700
                Re: Cake - C23 to C99 transpiler Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-09-07 10:28 -0700
                Re: Cake - C23 to C99 transpiler David Brown <david.brown@hesbynett.no> - 2022-09-07 20:05 +0200
            Re: Cake - C23 to C99 transpiler Thiago Adams <thiago.adams@gmail.com> - 2022-09-07 15:28 -0700
              Re: Cake - C23 to C99 transpiler Bart <bc@freeuk.com> - 2022-09-08 00:51 +0100
                Re: Cake - C23 to C99 transpiler Thiago Adams <thiago.adams@gmail.com> - 2022-09-08 05:20 -0700
                Re: Cake - C23 to C99 transpiler Bart <bc@freeuk.com> - 2022-09-08 16:41 +0100
                Re: Cake - C23 to C99 transpiler scott@slp53.sl.home (Scott Lurndal) - 2022-09-08 16:43 +0000
                Re: Cake - C23 to C99 transpiler Bart <bc@freeuk.com> - 2022-09-08 19:23 +0100
                Re: Cake - C23 to C99 transpiler Thiago Adams <thiago.adams@gmail.com> - 2022-09-08 09:59 -0700

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