Path: csiph.com!eternal-september.org!feeder.eternal-september.org!reader02.eternal-september.org!.POSTED!not-for-mail
From: Keith Thompson <kst-u@mib.org>
Newsgroups: comp.lang.c
Subject: Re: gcc_centric C code
Date: Fri, 27 Apr 2018 09:11:54 -0700
Organization: None to speak of
Lines: 22
Message-ID: <lnbme4fx2t.fsf@kst-u.example.com>
References: <I11EC.8185$oo.4543@fx35.am4> <87tvrzpa32.fsf@bsb.me.uk> <ess2mRa5zlV2ZGm8ZlNjs89DfacWi@bongo-ra.co> <29063935-b373-4307-be80-78a64134d0e7@googlegroups.com> <hve1ed93b184siupcu3cq1sgp8b37tg3fb@4ax.com> <lnpo2ngojj.fsf@kst-u.example.com> <kfnefj0n0uk.fsf@x-alumni2.alumni.caltech.edu>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Injection-Info: reader02.eternal-september.org; posting-host="cc0e2a6c7d0567601a378dba59302632"; logging-data="19828"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX1/7Ics8f7BO6MrEJW19ZaH9"
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux)
Cancel-Lock: sha1:wViJkcK/pXz45II5Q6fz3AtyPvA= sha1:DjpnHLa0KP+JUNj7sPGm54jMZzE=
Xref: csiph.com comp.lang.c:129858

Tim Rentsch <txr@alumni.caltech.edu> writes:
> Keith Thompson <kst-u@mib.org> writes:
>> Robert Wessel <robertwessel2@yahoo.com> writes:
>>> [contrasting __func__ and string-literal predefined macros]
>>
>> A very minor point:  values yielded by __func__ can be compared for
>> pointer equality.
>
> So can values of string-literal predefined macros.

Can be *meaningfully* compared.  This:

    printf("%d\n", __FILE__ == __FILE__);

could print either 0 or 1.  The value of __func__ for a given
non-inline function is always the same.

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"