Lisp operators
I just got home from a conference with my new job, a little bit tipsy and couldn’t sleep.
So I decided to add some new features to my Lisp clone.
I’ve made it possible to set operator priority for functions.
Eg.
(operator-priority + 1) (operator-priority - 1) (operator-priority * 2) (operator-priority / 2)
This will make the engine scan every list that does not start with a function for operators.
The engine will enter a loop that search for the operator with the highest priority and replace the operator together with the left and right argument with a new list where the operator is the first arg (a function call).
The process will be repeated untill no operators are found.
So a statement like:
(let a ((1 + 10) * 3 / 5 - 1))
Will be turned into:
(let a (-(/(*(+ 1 10) 3) 5) 1))
Which is a normal Lisp expression that can be evaluated.
Well, thats it for now, I’d better get some sleep now.
[Edit]
Update:
Ok, I’ve decided to change this a little bit.
The syntax will be:
(# 1 + 2 * 3 / 4)
And # will be a function that takes the rest of the formula as args.
Thus, not breaking any Lisp rules or syntax.
Remeber kids,
Don’t drink and develop…
