> the buildfarm seems to be mostly happy so far, so I've taken a quick
> look at the remaining two parts. The patches still apply, but I'm
> getting plenty of failures in regression tests, due to 0.0 being
> replaced by -0.0.
I think we are better off fixing them locally at the moment like your
patch does. We should consider to eliminate -0 globally for all
floating point based datatypes later. I simplified and incorporated
your change to line_interpt_line() into mine.
I am not sure about normalising -0s on point_construct(). We
currently allow points to be initialized with -0s. I think it is fair
for us to return -0 when -x and 0 are multiplied. That is the current
behavior and the behavior of the float datatypes. I adjusted the
results of the new regression tests accordingly.
> Another thing I noticed is the last few lines from line_interpt_line are
> actually unreachable, because there's now 'else return false' branch.
Which lines do you mean exactly? I don't see any being unreachable.