    {-|
        Derives an instance of @Monoid@. It uses the product
        construction of monoids. @mappend@ on two different constructors
        is undefined.
    -}
    module Data.Derive.Monoid(makeMonoid) where
    {-
    import Data.Monoid hiding (First)

    example :: Sample
    instance Monoid a => Monoid (Sample a) where
        mempty = head [First, Second (const mempty 1) (const mempty 2), Third (const mempty 1)]
        mappend (First) (First) = First
        mappend (Second x1 x2) (Second y1 y2) = Second (mappend x1 y1) (mappend x2 y2)
        mappend (Third x1) (Third y1) = Third (mappend x1 y1)
        mappend _ _ | length [First{},Second{},Third{}] > 1 = error "Monoid.mappend: Different constructors for Sample"

    -}
    -- GENERATED START

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

    makeMonoid :: Derivation
    makeMonoid = derivationDSL "Monoid" dslMonoid

    dslMonoid =
        List [Instance ["Monoid"] "Monoid" (App "Just" (List [List [App
        "InsDecl" (List [App "()" (List []),App "PatBind" (List [App "()"
        (List []),App "PVar" (List [App "()" (List []),App "Ident" (List [
        App "()" (List []),String "mempty"])]),App "UnGuardedRhs" (List [
        App "()" (List []),App "App" (List [App "()" (List []),App "Var" (
        List [App "()" (List []),App "UnQual" (List [App "()" (List []),
        App "Ident" (List [App "()" (List []),String "head"])])]),App
        "List" (List [App "()" (List []),MapCtor (Application (Concat (
        List [List [App "Con" (List [App "()" (List []),App "UnQual" (List
        [App "()" (List []),App "Ident" (List [App "()" (List []),CtorName
        ])])])],MapField (App "Paren" (List [App "()" (List []),
        Application (List [App "Var" (List [App "()" (List []),App
        "UnQual" (List [App "()" (List []),App "Ident" (List [App "()" (
        List []),String "const"])])]),App "Var" (List [App "()" (List []),
        App "UnQual" (List [App "()" (List []),App "Ident" (List [App "()"
        (List []),String "mempty"])])]),App "Lit" (List [App "()" (List []
        ),App "Int" (List [App "()" (List []),FieldIndex,ShowInt
        FieldIndex])])])]))])))])])]),App "Nothing" (List [])])]),App
        "InsDecl" (List [App "()" (List []),App "FunBind" (List [App "()"
        (List []),Concat (List [MapCtor (App "Match" (List [App "()" (List
        []),App "Ident" (List [App "()" (List []),String "mappend"]),List
        [App "PParen" (List [App "()" (List []),App "PApp" (List [App "()"
        (List []),App "UnQual" (List [App "()" (List []),App "Ident" (List
        [App "()" (List []),CtorName])]),MapField (App "PVar" (List [App
        "()" (List []),App "Ident" (List [App "()" (List []),Concat (List
        [String "x",ShowInt FieldIndex])])]))])]),App "PParen" (List [App
        "()" (List []),App "PApp" (List [App "()" (List []),App "UnQual" (
        List [App "()" (List []),App "Ident" (List [App "()" (List []),
        CtorName])]),MapField (App "PVar" (List [App "()" (List []),App
        "Ident" (List [App "()" (List []),Concat (List [String "y",ShowInt
        FieldIndex])])]))])])],App "UnGuardedRhs" (List [App "()" (List []
        ),Application (Concat (List [List [App "Con" (List [App "()" (List
        []),App "UnQual" (List [App "()" (List []),App "Ident" (List [App
        "()" (List []),CtorName])])])],MapField (App "Paren" (List [App
        "()" (List []),Application (List [App "Var" (List [App "()" (List
        []),App "UnQual" (List [App "()" (List []),App "Ident" (List [App
        "()" (List []),String "mappend"])])]),App "Var" (List [App "()" (
        List []),App "UnQual" (List [App "()" (List []),App "Ident" (List
        [App "()" (List []),Concat (List [String "x",ShowInt FieldIndex])]
        )])]),App "Var" (List [App "()" (List []),App "UnQual" (List [App
        "()" (List []),App "Ident" (List [App "()" (List []),Concat (List
        [String "y",ShowInt FieldIndex])])])])])]))]))]),App "Nothing" (
        List [])])),List [App "Match" (List [App "()" (List []),App
        "Ident" (List [App "()" (List []),String "mappend"]),List [App
        "PWildCard" (List [App "()" (List [])]),App "PWildCard" (List [App
        "()" (List [])])],App "GuardedRhss" (List [App "()" (List []),List
        [App "GuardedRhs" (List [App "()" (List []),List [App "Qualifier"
        (List [App "()" (List []),App "InfixApp" (List [App "()" (List [])
        ,App "App" (List [App "()" (List []),App "Var" (List [App "()" (
        List []),App "UnQual" (List [App "()" (List []),App "Ident" (List
        [App "()" (List []),String "length"])])]),App "List" (List [App
        "()" (List []),MapCtor (App "RecConstr" (List [App "()" (List []),
        App "UnQual" (List [App "()" (List []),App "Ident" (List [App "()"
        (List []),CtorName])]),List []]))])]),App "QVarOp" (List [App "()"
        (List []),App "UnQual" (List [App "()" (List []),App "Symbol" (
        List [App "()" (List []),String ">"])])]),App "Lit" (List [App
        "()" (List []),App "Int" (List [App "()" (List []),Int 1,ShowInt (
        Int 1)])])])])],App "App" (List [App "()" (List []),App "Var" (
        List [App "()" (List []),App "UnQual" (List [App "()" (List []),
        App "Ident" (List [App "()" (List []),String "error"])])]),App
        "Lit" (List [App "()" (List []),App "String" (List [App "()" (List
        []),Concat (List [String
        "Monoid.mappend: Different constructors for ",DataName]),Concat (
        List [String "Monoid.mappend: Different constructors for ",
        DataName])])])])])]]),App "Nothing" (List [])])]])])])]]))]
    -- GENERATED STOP