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Re: CC Mode - syntactical can of worms.

From: Stefan Monnier
Subject: Re: CC Mode - syntactical can of worms.
Date: Thu, 31 Jan 2008 10:00:07 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.50 (gnu/linux)

> Hi, Emacs and CC Mode!
> Following up from: address@hidden: Bug in emacs 22.1.1 (cosmetic
> bug)].

> This bug was in C Mode, with the following source line:

>     #warning for isn't a keyword here.

> This fouls up the fontification, because the syntactic fontification
> recognises the apostrophe as a string opener.  It can get pretty bad -
> here is a syntactically correct C function:

> 1   #warning for isn't a keyword here. (
> 2   //#warning for isnt a keyword here.
> 3   void foo (bar)
> 4   {
> 5   #error Brace yourself! }
> 6       printf ("Hello, world!\n") ; /* the famous one liner! */
> 7   }

You forget other interesting constructs such as

   #define HELLO }
   #define WORLD )
   void foo (WORLD
     printf ("Hello\n"WORLD;

and of course, the more common ones like

   #if foo
   void foo (void)
      size_t toto;
   int foo ()
      unsigned toto;

or how 'bout

   #include "hello.h"

   void foo (WORLD
     printf ("Hello\n"WORLD;

CC-mode's job is fundamentally impossible.


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