Re: moving some code out of explain.c

On Thu, Feb 27, 2025 at 3:05 PM Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Robert Haas <robertmhaas@gmail.com> writes:
> > The thing that was bugging me a bit is that explain_format.h includes
> > explain.h.
>
> Yeah, I did not like that at all either -- it makes things a bit
> circular, and I fear IWYU is going to make stupid recommendations
> like not including explain.h in explain.c.
>
> Did you look at avoiding that with our standard trick of writing
> detail-free struct declarations?  That is, explain_format.h
> would need
>
> struct ExplainState;            /* avoid including explain.h here */
>
> and then s/ExplainState/struct ExplainState/ in all the function
> declarations.  You'd still need to get List from someplace, but
> it could be gotten by including primnodes.h or even pg_list.h.

OK, here's a patch that does that. Thoughts?

--
Robert Haas
EDB: http://www.enterprisedb.com