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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: Add functions to C-mode?
Date: Sun, 20 Apr 2008 15:26:08 +0300
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> From: David Hansen <david.hansen@gmx.net>
> Date: Sun, 20 Apr 2008 09:17:15 +0200
> 
> On Sat, 19 Apr 2008 14:08:18 -0700 (PDT) Jason Rumney wrote:
> 
> > On Apr 19, 6:16 pm, David Hansen <david.han...@gmx.net> wrote:
> >
> >> If you insist on "//" (which is btw not ANSI C)
> >
> > Single line comments starting with // are part of the current ANSI and
> > ISO standard (C99)
> > .
> 
> AFAIK a standard w/o implementation.

??? You mean GCC does not count?  The below compiles without any
warnings with GCC 3.4.2:

$ cat tcomment.c
int main (void)
{
  int foo = 3; // C99 comment

  return foo;
}

$ gcc -std=c99 -Wall -Wextra -pedantic tcomment.c
$