[Chicken-hackers] tokenization question

[Peter Keller]

Hello,

How does chicken know what happened here:

csi> define
Error: unbound variable: define
csi> (define define (lambda () 42))
csi> define
#<procedure (define)>
csi> (define)
Error: (car) during expansion of (define ...) - bad argument type: ()

        Call history:

        <syntax>                (define)        <--
csi> 

How did it know the difference between the uses? Are special keywords like
'define' internally viewed differently than normal identifier names? Which
special keywords fall under this type of behavior--the usual ones as in R5RS?

Thank you.

-pete