> > But what surprises me the most is that it only works at the top level: > assign.rkt> > assign.rkt> (assign foo 3) > assign.rkt> (assign (bar x) (assign foo 7) (* x foo)) > assign.rkt> (bar 1) > 7 > assign.rkt> global > '#hash((bar . (λ (x) (assign foo 7) (* x foo))) (foo . 3)) > Interesting. Following your steps, I got a different result that makes more sense:
'#hash((bar . (λ (x) (assign foo 7) (* x foo))) (foo . 7)) Another question: my macro doesn't work with (f . xs) notation. Of course, > I could add a [_ f . xs] syntax-case. But I would also have to add a [_ f a > ... . xs]. Plus keywords. Is there a way not to have to describe every > possible situation? > For a “flat” function definition, (_ f a ... . xs) is the most general form. It encompasses patterns like (_ f . xs), where a matches 0 times, and (_ f 1 2), where xs is (). So if you have that, you don’t need any other cases. FYI: function definition allows the curry form too. E.g., (define ((f x) y) (+ x y)) The most convenient way to parse the header is to switch from syntax-case to syntax-parse, and use the function-header syntax class in syntax/parse/lib/function-header. Lambda doesn’t support currying notation though, so maybe you don’t care about it. -- > You received this message because you are subscribed to the Google Groups > "Racket Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to racket-users+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/racket-users/CAN4YmREN1q%2BDTF1UbTHc8LmN3gfnea5HAZCQfc%3DRPyLVHX2yVg%40mail.gmail.com > <https://groups.google.com/d/msgid/racket-users/CAN4YmREN1q%2BDTF1UbTHc8LmN3gfnea5HAZCQfc%3DRPyLVHX2yVg%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/CADcueguaarpbWdz3PEPjySY85ab9UNc%3Dx3h%2B4h3V6JLXEBOSMg%40mail.gmail.com.
