[plt-scheme] A couple of contract questions

How do I write a contract for a function that takes no arguments  
(i.e., a thunk)?

Is it possible to write a contract specifying that the return value  
is a function of particular shape? Ideally, I'd like to be able to  
write something like

(-> integer? (-> integer? integer?))

for a function like

(lambda (x) (lambda (y) (+ x y)))

but I don't know if that's possible. (Instead, I've just used  
procedure? for the range.)



"Mathematics is the science of patterns."
--Lynn Arthur Steen, 1988

http://www.gwoodhouse.com
http://GregWoodhouse.ImageKind.com





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