Safe Haskell	None
Language	GHC2021

JVM.Data.Abstract.Builder.Label

Description

Label type for instructions This data type allows referring to specific instructions (for jumps) without having to manually calculate their offsets. A label represents a unique instruction in a Code attribute, and is marked by inserting a Label instruction directly above the instruction it refers to. For example, the following (contrived) code:

       0: aload_0
       1: ifeq          4
       4: return

could be written as follows, using CodeBuilder:

emit ALoad0
label <- newLabel
emit (IfEq label)
emit (Label label)
emit Return

Documentation

newtype Label Source #

Constructors

MkLabel Int

Instances

Instances details

Data Label Source #
Instance details Defined in JVM.Data.Abstract.Builder.Label Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Label -> c Label # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Label # toConstr :: Label -> Constr # dataTypeOf :: Label -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Label) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Label) # gmapT :: (forall b. Data b => b -> b) -> Label -> Label # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Label -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Label -> r # gmapQ :: (forall d. Data d => d -> u) -> Label -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Label -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Label -> m Label # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Label -> m Label # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Label -> m Label #
Show Label Source #
Instance details Defined in JVM.Data.Abstract.Builder.Label Methods showsPrec :: Int -> Label -> ShowS # show :: Label -> String # showList :: [Label] -> ShowS #
Eq Label Source #
Instance details Defined in JVM.Data.Abstract.Builder.Label Methods (==) :: Label -> Label -> Bool # (/=) :: Label -> Label -> Bool #
Ord Label Source #
Instance details Defined in JVM.Data.Abstract.Builder.Label Methods compare :: Label -> Label -> Ordering # (<) :: Label -> Label -> Bool # (<=) :: Label -> Label -> Bool # (>) :: Label -> Label -> Bool # (>=) :: Label -> Label -> Bool # max :: Label -> Label -> Label # min :: Label -> Label -> Label #
Pretty Label Source #
Instance details Defined in JVM.Data.Abstract.Builder.Label Methods pretty :: Label -> Doc ann Source # prettyList :: [Label] -> Doc ann Source #