Safe Haskell	None
Language	Haskell2010

Util.Positive

Description

Definition of Positive type and related utilities.

Synopsis

newtype Positive = PositiveUnsafe {
- unPositive :: Natural
}
mkPositive :: (Integral i, Buildable i) => i -> Either Text Positive
lengthNE :: NonEmpty a -> Positive
replicateNE :: Positive -> a -> NonEmpty a

Documentation

newtype Positive Source #

Integer values starting from 1.

We define our own datatype in order to have Data instance for it, which can not be derived for third-party types without exported constructor.

Constructors

PositiveUnsafe
Fields unPositive :: Natural

Instances

Instances details

Eq Positive Source #
Instance details Defined in Util.Positive Methods (==) :: Positive -> Positive -> Bool # (/=) :: Positive -> Positive -> Bool #
Data Positive Source #
Instance details Defined in Util.Positive Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Positive -> c Positive # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Positive # toConstr :: Positive -> Constr # dataTypeOf :: Positive -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Positive) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Positive) # gmapT :: (forall b. Data b => b -> b) -> Positive -> Positive # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Positive -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Positive -> r # gmapQ :: (forall d. Data d => d -> u) -> Positive -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Positive -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Positive -> m Positive # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Positive -> m Positive # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Positive -> m Positive #
Ord Positive Source #
Instance details Defined in Util.Positive Methods compare :: Positive -> Positive -> Ordering # (<) :: Positive -> Positive -> Bool # (<=) :: Positive -> Positive -> Bool # (>) :: Positive -> Positive -> Bool # (>=) :: Positive -> Positive -> Bool # max :: Positive -> Positive -> Positive # min :: Positive -> Positive -> Positive #
Show Positive Source #
Instance details Defined in Util.Positive Methods showsPrec :: Int -> Positive -> ShowS # show :: Positive -> String # showList :: [Positive] -> ShowS #
Generic Positive Source #
Instance details Defined in Util.Positive Associated Types type Rep Positive :: Type -> Type # Methods from :: Positive -> Rep Positive x # to :: Rep Positive x -> Positive #
ToJSON Positive Source #
Instance details Defined in Util.Positive Methods toJSON :: Positive -> Value # toEncoding :: Positive -> Encoding # toJSONList :: [Positive] -> Value # toEncodingList :: [Positive] -> Encoding #
FromJSON Positive Source #
Instance details Defined in Util.Positive Methods parseJSON :: Value -> Parser Positive # parseJSONList :: Value -> Parser [Positive] #
NFData Positive Source #
Instance details Defined in Util.Positive Methods rnf :: Positive -> () #
Buildable Positive Source #
Instance details Defined in Util.Positive Methods build :: Positive -> Builder #
type Rep Positive Source #
Instance details Defined in Util.Positive type Rep Positive = D1 ('MetaData "Positive" "Util.Positive" "morley-1.7.0-inplace" 'True) (C1 ('MetaCons "PositiveUnsafe" 'PrefixI 'True) (S1 ('MetaSel ('Just "unPositive") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Natural)))

mkPositive :: (Integral i, Buildable i) => i -> Either Text Positive Source #

lengthNE :: NonEmpty a -> Positive Source #

Count length of non-empty list.

replicateNE :: Positive -> a -> NonEmpty a Source #

Produce a non empty list consisting of the given value.