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import Control.Exception (evaluate)
import qualified Data.List as L
-- The following will fuse with minimal heap usage provided
-- `findIndices` is marked `INLINABLE` instead of `INLINE`.
unsafeFindIndex p = head . L.findIndices p
main = do evaluate $ L.elemIndex 999999 [(1::Int)..1000000]
evaluate $ L.elemIndices 999999 [(1::Int)..1000000]
evaluate $ L.findIndex (>=999999) [(1::Int)..1000000]
evaluate $ L.findIndices (>=999999) [(1::Int)..1000000]
evaluate $ unsafeFindIndex (>=999999) [(1::Int)..1000000]
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