{-# OPTIONS_GHC -Wall #-}
{-# LANGUAGE CPP, DeriveDataTypeable, DeriveGeneric #-}
{-# LANGUAGE Safe #-}
module Data.IntervalRelation
( Relation(..)
, invert
)
where
import Data.Data
import GHC.Generics (Generic)
data Relation
= Before
| JustBefore
| Overlaps
| Starts
| During
| Finishes
| Equal
| FinishedBy
| Contains
| StartedBy
| OverlappedBy
| JustAfter
| After
deriving (Relation -> Relation -> Bool
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Relation
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Relation
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