On Sun, Sep 16, 2012 at 11:52 PM, Alexsandro Soares
<[email protected]> wrote:
> (def-->e expr1 [t e]
> ([t1 ?e1] (fresh [tk t2]
> (token '+ tk) (term t2) (expr1 {:binop '+ t1 t2} ?e1)))
> ([_ t] []))
> (def-->e term1 [f t]
> ([f1 ?t1] (fresh [tk f2]
> (token '* tk) (factor f2) (term1 {:binop '* f1 f2} ?t1)))
> ([_ f] []))
You can't use logic variables as keys in maps.
A side note ... the DCG namespace is *very* experimental :)
David
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