The BitKeeper man page macros use this sort of construct a lot.

-----Original Message-----
From: "Doug McIlroy" <d...@cs.dartmouth.edu>
Sent: Tuesday, April 25, 2017 4:00pm
To: groff@gnu.org
Subject: Re: [Groff] Nesting font macros in man pages

> .TP
> .B \-scale \c
> .IR xfac [, yfac ]

Very clever. I wish I'd thought of it when I was editing
the v7 manual. Then it would have become a standard idiom.
Has nobody tried this during the nearly 40 years since?

Doug




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