prefix operators

[joelmccracken]

Howdy,

I am using this lib to translate/debug logical statements into code, and then evaluating them to see that they're equal.

The thing I'm frustrated with is not, or neg - I'd like a unary prefix operator.

$(a and (not b)) works, but b gets complex, e.g. $(a and (not {a or b})), well that's not processed; so I went and looked and saw that $(a and ($ not {a or b})) was supported; I did that, but ended up makign an an operator (defun neg (x y) (not y)) (infix #x500 neg) jthat just ignores its first argument, which is a little more natural.

I see you noted about prefix operators in your source. Any advice on implementation?

And, thanks for the lib! I thought at least you might like to hear how someone's using it.