Re: [PATCH] Improve geometric types

> And this should be the last comment of mine on the patch set.

Thank you. The new versions of the patches are attached addressing
your comments.

> By the way, I found that MAXDOUBLEWIDTH has two inconsistent
> definitions in formatting.c(500) and float.c(128). The definition
> in new float.h is according to float.c and it seems better to be
> untouched and it would be another issue.

The last version of the patch don't move these declarations to the header file.

> # The commit message of 0001 says that "using C11 hypot()" but it
> # is sine C99. I suppose we shold follow C99 at the time so I
> # suggest rewrite it in the next version if any.

Changed.

> close_pl got a bug fix not only refactoring. I think it is
> recommended to separate bugs and improvements, but I'm fine with
> the current patch.

I split the refactoring to the first patch.

> You added sanity check "A==0 && B==0" (in Ax + By + C) in
> line_recv. I'm not sure the necessity of the check since it has
> been checked in line_in but anyway the comparisons seem to be
> typo(or thinko) of FPzero.

Tom Lane suggested [1] this one. I now made it use FPzero().

> dist_pl is changed to take the smaller distance of both ends of
> the segment. It seems absorbing error, so it might be better
> taking the mean of the two distances. If you have a firm reason
> for the change, it is better to be written there, or it might be
> better left alone.

I don't really, so I left that part out.

[1] https://www.postgresql.org/message-id/11053.1466362319%40sss.pgh.pa.us