Re: do {} while (0) nitpick - Mailing list pgsql-hackers

From Tom Lane
Subject Re: do {} while (0) nitpick
Date
Msg-id 25358.1588368731@sss.pgh.pa.us
Whole thread Raw
In response to Re: do {} while (0) nitpick  (David Steele <david@pgmasters.net>)
Responses Re: do {} while (0) nitpick  (Jesse Zhang <sbjesse@gmail.com>)
List pgsql-hackers
David Steele <david@pgmasters.net> writes:
> On 4/30/20 9:52 PM, Bruce Momjian wrote:
>> On Thu, Apr 30, 2020 at 09:51:10PM -0400, Tom Lane wrote:
>>> Yeah.  I'd call these actual bugs, and perhaps even back-patch worthy.

>> Agreed.  Those semicolons could easily create bugs.

> +1. The patch looks good to me.

Grepping showed me that there were some not-do-while macros that
also had trailing semicolons.  These seem just as broken, so I
fixed 'em all.

There are remaining instances of this antipattern in the flex-generated
scanners, which we can't do anything about; and in pl/plperl/ppport.h,
which we shouldn't do anything about because that's upstream-generated
code.  (I wonder though if there's a newer version available.)

            regards, tom lane



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