Re: [Groff] The \D request in nroff and troff modes

[Werner LEMBERG]

>> That seems odd.  If this were pixel computer graphics then 13u may
>> be rounded up to 24u but that would be a 24 pixel-long line
>> occupying pixels 0 to 23 inclusive; clearly just a single character
>> cell.
> 
> Well, groff is different :) Doing \D'l 0 0' already draws something.
> You get a `+' because it is not possible to decide whether it is a
> horizontal or vertical line.
> 
> Can someone check what AT&T nroff does?  Or heirloom troff?  Maybe
> I've introduced some sillyness years ago and I should change groff
> back so that \D'l 0 0' draws nothing and \D'l 24u 0' a single
> character cell...

I've just tested heirloom troff, and it doesn't support \D'l ...' with
nroff.  Consequently, I think AT&T nroff doesnt' do it either.

Will have to think how to proceed...

Suggestions?


    Werner