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Re: PATCH: malloc.c cleanups

To: Wolfram Gloger <wmglo at dent dot med dot uni-muenchen dot de>
Subject: Re: PATCH: malloc.c cleanups
From: Andreas Schwab <schwab at suse dot de>
Date: Wed, 19 Jul 2000 11:23:34 +0200
Cc: greg at mcgary dot org, libc-hacker at sourceware dot cygnus dot com
References: <200007180717.AAA28227@kayak.mcgary.org><20000718082325.13174.qmail@md.dent.med.uni-muenchen.de><mshf9nflf6.fsf@mcgary.org><20000719081614.13639.qmail@md.dent.med.uni-muenchen.de>

Wolfram Gloger <wmglo@dent.med.uni-muenchen.de> writes:

|> OK, I see.  It's probably a matter of taste, but I would prefer to see
|> sizeof(main_arena.av[0]) used rather than the cast NULL pointer.  My C
|> standard draft says that expressions `usually' aren't evaluated within
|> sizeof, but only in a footnote.

The sizeof expression is only evaluated if it contains a VLA.  This is
clearly stated in the semantics section (6.5.3.4#2).

Andreas.

-- 
Andreas Schwab                                  "And now for something
SuSE Labs                                        completely different."
Andreas.Schwab@suse.de
SuSE GmbH, Schanzäckerstr. 10, D-90443 Nürnberg

References:
- PATCH: malloc.c cleanups
  - From: Greg McGary
- Re: PATCH: malloc.c cleanups
  - From: Wolfram Gloger
- Re: PATCH: malloc.c cleanups
  - From: Greg McGary
- Re: PATCH: malloc.c cleanups
  - From: Wolfram Gloger

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