Re: Improvement for bmake: boolean values

[der Mouse <mouse%Rodents-Montreal.ORG@localhost>]

>> .function yesno(s) ((s ==i "yes") || (s == "1") || \
>>      ((s !=i "no") && (s != "0") && error("invalid yesno() argument"))
> ISTRUE=($1 ==i "yes") || ($1 == "1") || \
>        (($1 !=i "no") && ($1 != "0") && ${.ERROR:> "Invalid truth value"})

> .if ${ISTRUE:> ${FOO}}

Doh!  Yes, you are _so_ right.  I obviously didn't have my head deep
enough into the make paradigm when I scribbled my idea out.

> I've floated this idea before a couple of times but it's always
> seemed like a jumbo-sized can of worms.  On the plus side, it's not
> that big a jump to implement.

No?  Do we already have binding contours?  That's what this seems to me
to be demanding, and I don't think we have anything like them.

Though perhaps if it applies to just $1, $2, etc, which have no other
meaning...maybe the magic can be in those variables rather than in a
full-fledged binding mechanism.

/~\ The ASCII                             Mouse
\ / Ribbon Campaign
 X  Against HTML                mouse%rodents-montreal.org@localhost
/ \ Email!           7D C8 61 52 5D E7 2D 39  4E F1 31 3E E8 B3 27 4B