Re: Quick question: how to do .index in groff?

[Denis M. Wilson]

Hello

On Sun, 26 Jul 2020 11:05:38 +1000
John Gardner <gardnerjohng@gmail.com> wrote:

> >
> > but I guess that's an indication I'm thinking about things in the
> > wrong way.  
> 
> 
> Possibly. What exactly have you been using `.index` for?
> 
> By the way, is it a goal of groff to support the Heirloom Troff
> extensions?
> 
> 
> Nope, more like the other way around. Groff is the dominant Troff
> implementation these days, so it behoves Heirloom Troff to support
> the more commonly-used extensions.
> 
> 
> 
> On Sun, 26 Jul 2020 at 10:42, B 9 <hackerb9@member.fsf.org> wrote:
> 
> > "Denis M. Wilson" <dmw@oxytropis.plus.com> wrote:
> >  
> > > To implement .index as a macro one could consider using .substring
> > > together with the Knuth-Morris-Pratt algorithm. I've done simpler
> > > things eg the equivalent of The C library substr().  
> >
> > Thank you. Would you be willing to share your strstr() macro?
> >
> > I'm surprised nobody has implemented Heirloom Troff's .index, but I
> > guess that's an indication I'm thinking about things in the wrong
> > way. There's probably some other, more natural solution in groff.
> >
> > By the way, is it a goal of groff to support the Heirloom Troff
> > extensions? There are some nice ideas I wouldn't mind seeing in
> > groff, like the \W escape and using standard system fonts.

and the Knuth-Plass paragraph breaking, amd I also want to see groff use
opentype fonts (both of which I believe are in heirloom).
Denis

> >
> > —b9
> >
> >  


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