Re: [Groff] groff version numbering

[Werner LEMBERG]

> It's \n[.Y] I'm worried about.  I can't for the life of me recall
> whether official groff releases contain a revision number, or
> whether that gets stripped.

\n[.Y] is a real number register (and not string valued), so it is 0
for 1.19, 1 for 1.19.1, etc.

It's a peculiarity of troff that some number registers can return
arbitrary strings, but this isn't an invention of groff but has been
in Unix troff from the very beginning AFAIK.  I think the idea was
originally to avoid any predefined string register, possibly for
implementation reasons (since strings share the same namespace and
some code with macros and diversions).


    Werner