Re: refactoring comment.c

On Fri, Aug 27, 2010 at 9:35 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Alvaro Herrera <alvherre@commandprompt.com> writes:
>> Didn't we inject some smarts so that the compiler would notice that
>> elog(ERROR) doesn't return?
>
> No.  If you know a portable (as in "works on every compiler") way
> to do that, we could talk.  If only some compilers understand it,
> we'll probably end up worse off --- the ones that don't understand it
> will still need things like these unreachable assignments, while the
> ones that do understand will start warning about unreachable code.

What's a bit odd about this is that I do get warnings for this kind of
thing in general, which get turned into errors since I compile with
-Werror; and in fact the version of the patch that I committed has no
fewer than four places where there is a comment that says "placate
compiler".  But for some reason the compiler I used to develop this
patch (gcc-4.2.1 i686-apple-darwin10) did not complain about this
case, for reasons that are not quite clear to me.

Which I guess also goes to your point.

--
Robert Haas
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