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deque-blog/dsl_arithmetic_1_partial.hs

Created January 16, 2017 20:20
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dsl_arithmetic_1_partial.hs
partial :: Env -> Expr -> Expr
partial env e@(Var v) =
case Map.lookup v env of
Nothing -> e
Just n -> cst n
partial env (Op opType xs) = Op opType (map (partial env) xs)
partial env e = e
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