Re: using 0 instead of NULL

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Article #74748

#74748

From: Jym Dyer
Date: Wed, 06 Mar 1991 16:25

15 lines
1198 bytes

___
 __ I haven't looked at the bison code, and I agree that testing
  _ for 0 instead of NULL is not a good thing.  Note, though,
    that no matter what NULL is defined as, the following C
    statements are equivalent:

	if (something_p != NULL)

	if (something_p)
___
 __ In a system where NULL isn't zero, `something_p' can be
  _ zero and the second "if" statement will evaluate it as
    true.  Unless the ever-emerging ANSI standard for C has
    changed since I last looked at it. :-)
    <_Jym_>

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From: jym@mica.berkeley.edu (Jym Dyer)
Newsgroups: gnu.misc.discuss
Subject: Re: using 0 instead of NULL
Message-ID: <JYM.91Mar6112521@remarque.berkeley.edu>
Date: 6 Mar 91 16:25:21 GMT
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In-Reply-To: kevinb@maccs.dcss.mcmaster.ca's message of 3 Mar 91 21:29:40 GMT

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