From dev-return-1827-apmail-apr-dev-archive=apr.apache.org@apr.apache.org Wed Apr 11 15:52:20 2001
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To: Justin Erenkrantz <jerenkrantz@ebuilt.com>
Cc: rbb@covalent.net, "William A. Rowe, Jr." <wrowe@rowe-clan.net>,
        dev@apr.apache.org
Subject: Re: Buckets code question
References: <005601c0c250$e44d3050$94c0b0d0@roweclan.net> <Pine.LNX.4.30.0104110731540.14374-100000@koj.rkbloom.net> <20010411073551.F10042@ebuilt.com>
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Date: 11 Apr 2001 10:48:20 -0500
In-Reply-To: Justin Erenkrantz's message of "Wed, 11 Apr 2001 07:35:51 -0700"
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Justin Erenkrantz <jerenkrantz@ebuilt.com> writes:

> If I understand this snippet correctly, why do we even have the do while 
> loop in the first place?

I present you with a comment near a similar macro (SVN_ERR) used in
Subversion.

/* The `do { ... } while (0)' wrapper has no semantic effect, but it
   makes this macro syntactically equivalent to the expression
   statement it resembles.  Without it, statements like

     if (a)
       SVN_ERR (some operation);
     else
       foo;

   would not mean what they appear to.  */