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Re: switch question in recog.c

From: Nix <nix at esperi dot org dot uk>
To: "Zack Weinberg" <zack at codesourcery dot com>
Cc: gcc mailing list <gcc at gcc dot gnu dot org>
Date: Mon, 13 Oct 2003 00:58:04 +0100
Subject: Re: switch question in recog.c
References: <Pine.LNX.4.44.0310080010220.20328-100000@wotan.suse.de><87d6d84r5m.fsf@codesourcery.com>

On Tue, 7 Oct 2003, Zack Weinberg moaned:
> "For maximum obfuscation, the outer braces can be removed":

The most extreme example of this I've ever seen came from the
UNIX-HATERS archives, attributed to Harbison and Steele's "C: A
Reference Manual".. I'm sure that everyone looking at this will
agree that it is a nice clear and sensible micro-optimization:

  switch (x)
    default:
      if (prime(x))
        case 2: case 3: case 5: case 7:
	  process_prime(x);
      else
        case 4: case 6: case 8: case 9: case 10:
	  process_composite(x);

-- 
`If you want a vision of the future, it is a wireless broadband network
 feeding requests for foreign money-laundering assistance into a human
 temporal lobe, forever. With banner ads.' --- John M. Ford

References:
- Re: switch question in recog.c
  - From: Michael Matz
- Re: switch question in recog.c
  - From: Zack Weinberg

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