You only use ? when dealing with the pattern matching sugar. On Friday, October 7, 2011, Sunil S Nandihalli <sunil.nandiha...@gmail.com> wrote: > Hi, > I was looking through the core.logic readme file. I notice that the var-names (symbols) are prefixed with '?' at some locations and they are not at some other locations. Can somebody help me figure this out. > Please look at the readme file found at > https://github.com/clojure/core.logic > > (use '[clojure.core.logic minikanren prelude nonrel match]) > > (defna findo [x l o] > ([_ [[?y :- o] . _] _] > (project [x ?y] (== (= x ?y) true))) > ([_ [_ . ?c] _] (findo x ?c o))) > > (defn typedo [c x
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