Possible bug in pic regarding lines and corners

[James Bostock]

Hi,

In groff, the .ne, .nw, .se and .sw corners of a line are all placed
at the start of a line. I don't have access to the original pic but I
do have access to the Plan 9 pic which places these four corners at
the centre of the line. I imagine that groff's pic should behave as
the pic that came with the 10th edition Unix.

This appears to be due to the line_object class not overriding the
north_east(), north_west(), south_east() and south_west() methods of
the object class (the default implementations return the object's
origin which, for a line, is its start point).

However, since these corners do not make much sense in the context of
a line, maybe this cannot be considered a bug.

The attached me document at the end of this email illustrates the
problem. Process with "groff -p -me -Tps jb008.nr > jb008.ps".

The version of groff I tested with was 1.18.1 but the code referred to
is version 1.19.2 so I suspect the problem (if it is indeed a problem)
is still present.

Regards,

James

jb008.nr
Description: Binary data