Safe Haskell	None
Language	Haskell2010

GHC.Types.Unique.Supply

Contents

Main data type
- Operations on supplies
Unique supply monad and its abstraction
- Operations on the monad
Set supply strategy

Synopsis

data UniqSupply
uniqFromSupply :: UniqSupply -> Unique
uniqsFromSupply :: UniqSupply -> [Unique]
takeUniqFromSupply :: UniqSupply -> (Unique, UniqSupply)
uniqFromMask :: Char -> IO Unique
mkSplitUniqSupply :: Char -> IO UniqSupply
splitUniqSupply :: UniqSupply -> (UniqSupply, UniqSupply)
listSplitUniqSupply :: UniqSupply -> [UniqSupply]
data UniqSM result
class Monad m => MonadUnique m where
- getUniqueSupplyM :: m UniqSupply
- getUniqueM :: m Unique
- getUniquesM :: m [Unique]
initUs :: UniqSupply -> UniqSM a -> (a, UniqSupply)
initUs_ :: UniqSupply -> UniqSM a -> a
initUniqSupply :: Int -> Int -> IO ()

Main data type

data UniqSupply Source #

Unique Supply

A value of type UniqSupply is unique, and it can supply one distinct Unique. Also, from the supply, one can also manufacture an arbitrary number of further UniqueSupply values, which will be distinct from the first and from all others.

Operations on supplies

uniqFromSupply :: UniqSupply -> Unique Source #

Obtain the Unique from this particular UniqSupply

uniqsFromSupply :: UniqSupply -> [Unique] Source #

Obtain an infinite list of Unique that can be generated by constant splitting of the supply

takeUniqFromSupply :: UniqSupply -> (Unique, UniqSupply) Source #

Obtain the Unique from this particular UniqSupply, and a new supply

uniqFromMask :: Char -> IO Unique Source #

mkSplitUniqSupply :: Char -> IO UniqSupply Source #

Create a unique supply out of thin air. The character given must be distinct from those of all calls to this function in the compiler for the values generated to be truly unique.

splitUniqSupply :: UniqSupply -> (UniqSupply, UniqSupply) Source #

Build two UniqSupply from a single one, each of which can supply its own Unique.

listSplitUniqSupply :: UniqSupply -> [UniqSupply] Source #

Create an infinite list of UniqSupply from a single one

Unique supply monad and its abstraction

data UniqSM result Source #

A monad which just gives the ability to obtain Uniques

Instances

Instances details

Monad UniqSM #
Instance details Defined in GHC.Types.Unique.Supply Methods (>>=) :: UniqSM a -> (a -> UniqSM b) -> UniqSM b Source # (>>) :: UniqSM a -> UniqSM b -> UniqSM b Source # return :: a -> UniqSM a Source #
Functor UniqSM #
Instance details Defined in GHC.Types.Unique.Supply Methods fmap :: (a -> b) -> UniqSM a -> UniqSM b Source # (<$) :: a -> UniqSM b -> UniqSM a Source #
MonadFix UniqSM #
Instance details Defined in GHC.Types.Unique.Supply Methods mfix :: (a -> UniqSM a) -> UniqSM a Source #
MonadFail UniqSM #
Instance details Defined in GHC.Types.Unique.Supply Methods fail :: String -> UniqSM a Source #
Applicative UniqSM #
Instance details Defined in GHC.Types.Unique.Supply Methods pure :: a -> UniqSM a Source # (<>) :: UniqSM (a -> b) -> UniqSM a -> UniqSM b Source # liftA2 :: (a -> b -> c) -> UniqSM a -> UniqSM b -> UniqSM c Source # (>) :: UniqSM a -> UniqSM b -> UniqSM b Source # (<*) :: UniqSM a -> UniqSM b -> UniqSM a Source #
MonadUnique UniqSM #
Instance details Defined in GHC.Types.Unique.Supply Methods getUniqueSupplyM :: UniqSM UniqSupply Source # getUniqueM :: UniqSM Unique Source # getUniquesM :: UniqSM [Unique] Source #

class Monad m => MonadUnique m where Source #

A monad for generating unique identifiers

Minimal complete definition

getUniqueSupplyM

Methods

getUniqueSupplyM :: m UniqSupply Source #

Get a new UniqueSupply

getUniqueM :: m Unique Source #

Get a new unique identifier

getUniquesM :: m [Unique] Source #

Get an infinite list of new unique identifiers

Instances

Instances details

MonadUnique UniqSM #
Instance details Defined in GHC.Types.Unique.Supply Methods getUniqueSupplyM :: UniqSM UniqSupply Source # getUniqueM :: UniqSM Unique Source # getUniquesM :: UniqSM [Unique] Source #
MonadUnique LiftM #
Instance details Defined in GHC.Stg.Lift.Monad Methods getUniqueSupplyM :: LiftM UniqSupply Source # getUniqueM :: LiftM Unique Source # getUniquesM :: LiftM [Unique] Source #
MonadUnique CoreM #
Instance details Defined in GHC.Core.Opt.Monad Methods getUniqueSupplyM :: CoreM UniqSupply Source # getUniqueM :: CoreM Unique Source # getUniquesM :: CoreM [Unique] Source #
MonadUnique SimplM #
Instance details Defined in GHC.Core.Opt.Simplify.Monad Methods getUniqueSupplyM :: SimplM UniqSupply Source # getUniqueM :: SimplM Unique Source # getUniquesM :: SimplM [Unique] Source #
MonadUnique TcS #
Instance details Defined in GHC.Tc.Solver.Monad Methods getUniqueSupplyM :: TcS UniqSupply Source # getUniqueM :: TcS Unique Source # getUniquesM :: TcS [Unique] Source #
MonadUnique LlvmM #
Instance details Defined in GHC.CmmToLlvm.Base Methods getUniqueSupplyM :: LlvmM UniqSupply Source # getUniqueM :: LlvmM Unique Source # getUniquesM :: LlvmM [Unique] Source #
MonadUnique NatM #
Instance details Defined in GHC.CmmToAsm.Monad Methods getUniqueSupplyM :: NatM UniqSupply Source # getUniqueM :: NatM Unique Source # getUniquesM :: NatM [Unique] Source #
MonadUnique FCode #
Instance details Defined in GHC.StgToCmm.Monad Methods getUniqueSupplyM :: FCode UniqSupply Source # getUniqueM :: FCode Unique Source # getUniquesM :: FCode [Unique] Source #
MonadUnique CmmParse #
Instance details Defined in GHC.StgToCmm.ExtCode Methods getUniqueSupplyM :: CmmParse UniqSupply Source # getUniqueM :: CmmParse Unique Source # getUniquesM :: CmmParse [Unique] Source #
MonadUnique (IOEnv (Env gbl lcl)) #
Instance details Defined in GHC.Tc.Utils.Monad Methods getUniqueSupplyM :: IOEnv (Env gbl lcl) UniqSupply Source # getUniqueM :: IOEnv (Env gbl lcl) Unique Source # getUniquesM :: IOEnv (Env gbl lcl) [Unique] Source #

Operations on the monad

initUs :: UniqSupply -> UniqSM a -> (a, UniqSupply) Source #

Run the UniqSM action, returning the final UniqSupply

initUs_ :: UniqSupply -> UniqSM a -> a Source #

Run the UniqSM action, discarding the final UniqSupply

Set supply strategy

initUniqSupply :: Int -> Int -> IO () Source #