view paper/src/AgdaElem.agda @ 72:fd984cfd5425

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author atton <atton@cr.ie.u-ryukyu.ac.jp>
date Mon, 06 Feb 2017 10:32:49 +0900
parents fb42478e4c96
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elem : {A : Set} {{eqA : Eq A}} → A → List A → Bool
elem {{eqA}} x (y ∷ xs) = (Eq._==_ eqA x y) || (elem {{eqA}} x xs)
elem         x []        = false