Re: [Groff] condition: OR of two string comparisons

[Werner LEMBERG]

>> .if x  versus  .ifx

Having `.if x' instead of a new keyword `.ifx' is appealing to me.
Assuming that we have a global register to activate a novel
interpretation of expressions (as suggested by Colin), we could indeed
simply stay with the currently available keywords.  A similar approach
is already used by Heirloom troff to define various extensions.

Note, however, that it gets tricky if groff tries to execute `modern'
macros in compatibility mode (.cp 0), cf. `.de1' and friends.


    Werner