On Aug 20, 2007, at 4:05 AM, naruto canada wrote:

(define (func x y) (+ x y)) (eval (cons func '(1 2)))

If you type

[descartes:~] lucier% gsc Gambit Version 4.0 beta 23

(define (func x y) (+ x y)) (cons func '(1 2))

(#<procedure #2 func> 1 2)

you see that the car of the list you just built is not a symbol, it's a function, so eval doesn't like it:

(eval (cons func '(1 2)))

*** ERROR -- Ill-formed expression #<procedure #2 func> 1>

So quote "func" to make it a symbol:

(cons 'func '(1 2))

(func 1 2)

(eval (cons 'func '(1 2)))

3

Actually, I'm kind of surprised it worked, I didn't think Gambit's eval took the user's environment into account ...

Brad