    module Data.Derive.EnumCyclic where
    {-
    import Prelude(Enum)

    example :: Sample

    instance Enum (Sample a) where
        toEnum 0 = First{}
        toEnum 1 = Second{}
        toEnum 2 = Third{}
        toEnum n = error $ "toEnum " ++ show n ++ ", not defined for Sample"

        fromEnum (First{}) = 0
        fromEnum (Second{}) = 1
        fromEnum (Third{}) = 2

        succ a = if b == length [First{},Second{},Third{}] then toEnum 0 else toEnum (b+1)
            where b = fromEnum a

        pred a = if b == 0 then toEnum (length [First{},Second{},Third{}]) else toEnum (b-1)
            where b = fromEnum a

    -}
    -- GENERATED START

    import Data.Derive.DSL.DSL
    import Data.Derive.Internal.Derivation

    makeEnumCyclic :: Derivation
    makeEnumCyclic = derivationDSL "EnumCyclic" dslEnumCyclic

    dslEnumCyclic =
        List [Instance [] "Enum" (List [App "InsDecl" (List [App "FunBind"
        (List [Concat (List [MapCtor (App "Match" (List [App "Ident" (List
        [String "toEnum"]),List [App "PLit" (List [App "Signless" (List []
        ),App "Int" (List [CtorIndex])])],App "Nothing" (List []),App
        "UnGuardedRhs" (List [App "RecConstr" (List [App "UnQual" (List [
        App "Ident" (List [CtorName])]),List []])]),App "Nothing" (List []
        )])),List [App "Match" (List [App "Ident" (List [String "toEnum"])
        ,List [App "PVar" (List [App "Ident" (List [String "n"])])],App
        "Nothing" (List []),App "UnGuardedRhs" (List [App "InfixApp" (List
        [App "Var" (List [App "UnQual" (List [App "Ident" (List [String
        "error"])])]),App "QVarOp" (List [App "UnQual" (List [App "Symbol"
        (List [String "$"])])]),Fold (App "InfixApp" (List [Head,App
        "QVarOp" (List [App "UnQual" (List [App "Symbol" (List [String
        "++"])])]),Tail])) (List [App "Lit" (List [App "String" (List [
        String "toEnum "])]),App "App" (List [App "Var" (List [App
        "UnQual" (List [App "Ident" (List [String "show"])])]),App "Var" (
        List [App "UnQual" (List [App "Ident" (List [String "n"])])])]),
        App "Lit" (List [App "String" (List [Concat (List [String
        ", not defined for ",DataName])])])])])]),App "Nothing" (List [])]
        )]])])]),App "InsDecl" (List [App "FunBind" (List [MapCtor (App
        "Match" (List [App "Ident" (List [String "fromEnum"]),List [App
        "PParen" (List [App "PRec" (List [App "UnQual" (List [App "Ident"
        (List [CtorName])]),List []])])],App "Nothing" (List []),App
        "UnGuardedRhs" (List [App "Lit" (List [App "Int" (List [CtorIndex]
        )])]),App "Nothing" (List [])]))])]),App "InsDecl" (List [App
        "FunBind" (List [List [App "Match" (List [App "Ident" (List [
        String "succ"]),List [App "PVar" (List [App "Ident" (List [String
        "a"])])],App "Nothing" (List []),App "UnGuardedRhs" (List [App
        "If" (List [App "InfixApp" (List [App "Var" (List [App "UnQual" (
        List [App "Ident" (List [String "b"])])]),App "QVarOp" (List [App
        "UnQual" (List [App "Symbol" (List [String "=="])])]),App "App" (
        List [App "Var" (List [App "UnQual" (List [App "Ident" (List [
        String "length"])])]),App "List" (List [MapCtor (App "RecConstr" (
        List [App "UnQual" (List [App "Ident" (List [CtorName])]),List []]
        ))])])]),App "App" (List [App "Var" (List [App "UnQual" (List [App
        "Ident" (List [String "toEnum"])])]),App "Lit" (List [App "Int" (
        List [Int 0])])]),App "App" (List [App "Var" (List [App "UnQual" (
        List [App "Ident" (List [String "toEnum"])])]),App "Paren" (List [
        App "InfixApp" (List [App "Var" (List [App "UnQual" (List [App
        "Ident" (List [String "b"])])]),App "QVarOp" (List [App "UnQual" (
        List [App "Symbol" (List [String "+"])])]),App "Lit" (List [App
        "Int" (List [Int 1])])])])])])]),App "Just" (List [App "BDecls" (
        List [List [App "PatBind" (List [App "PVar" (List [App "Ident" (
        List [String "b"])]),App "UnGuardedRhs" (List [App "App" (List [
        App "Var" (List [App "UnQual" (List [App "Ident" (List [String
        "fromEnum"])])]),App "Var" (List [App "UnQual" (List [App "Ident"
        (List [String "a"])])])])]),App "Nothing" (List [])])]])])])]])]),
        App "InsDecl" (List [App "FunBind" (List [List [App "Match" (List
        [App "Ident" (List [String "pred"]),List [App "PVar" (List [App
        "Ident" (List [String "a"])])],App "Nothing" (List []),App
        "UnGuardedRhs" (List [App "If" (List [App "InfixApp" (List [App
        "Var" (List [App "UnQual" (List [App "Ident" (List [String "b"])])
        ]),App "QVarOp" (List [App "UnQual" (List [App "Symbol" (List [
        String "=="])])]),App "Lit" (List [App "Int" (List [Int 0])])]),
        App "App" (List [App "Var" (List [App "UnQual" (List [App "Ident"
        (List [String "toEnum"])])]),App "Paren" (List [App "App" (List [
        App "Var" (List [App "UnQual" (List [App "Ident" (List [String
        "length"])])]),App "List" (List [MapCtor (App "RecConstr" (List [
        App "UnQual" (List [App "Ident" (List [CtorName])]),List []]))])])
        ])]),App "App" (List [App "Var" (List [App "UnQual" (List [App
        "Ident" (List [String "toEnum"])])]),App "Paren" (List [App
        "InfixApp" (List [App "Var" (List [App "UnQual" (List [App "Ident"
        (List [String "b"])])]),App "QVarOp" (List [App "UnQual" (List [
        App "Symbol" (List [String "-"])])]),App "Lit" (List [App "Int" (
        List [Int 1])])])])])])]),App "Just" (List [App "BDecls" (List [
        List [App "PatBind" (List [App "PVar" (List [App "Ident" (List [
        String "b"])]),App "UnGuardedRhs" (List [App "App" (List [App
        "Var" (List [App "UnQual" (List [App "Ident" (List [String
        "fromEnum"])])]),App "Var" (List [App "UnQual" (List [App "Ident"
        (List [String "a"])])])])]),App "Nothing" (List [])])]])])])]])])]
        )]
    -- GENERATED STOP