25 lines
654 B
Text
25 lines
654 B
Text
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let Optional/fold =
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missing
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sha256:c5b9d72f6f62bdaa0e196ac1c742cc175cd67a717b880fb8aec1333a5a4132cf
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? ./fold.dhall
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let Optional/null =
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missing
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sha256:3871180b87ecaba8b53fffb2a8b52d3fce98098fab09a6f759358b9e8042eedc
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? ./null.dhall
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let equal
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: forall (a : Type) -> (a -> a -> Bool) -> Optional a -> Optional a -> Bool
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= \(a : Type) ->
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\(compare : a -> a -> Bool) ->
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\(ox : Optional a) ->
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\(oy : Optional a) ->
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Optional/fold
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a
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ox
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Bool
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(\(x : a) -> Optional/fold a oy Bool (compare x) False)
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(Optional/null a oy)
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in equal
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