| Safe Haskell | None |
|---|---|
| Language | Haskell98 |
UniqSupply
Contents
- data UniqSupply
- uniqFromSupply :: UniqSupply -> Unique
- uniqsFromSupply :: UniqSupply -> [Unique]
- takeUniqFromSupply :: UniqSupply -> (Unique, UniqSupply)
- 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
- lazyThenUs :: UniqSM a -> (a -> UniqSM b) -> UniqSM b
- lazyMapUs :: (a -> UniqSM b) -> [a] -> UniqSM [b]
- getUniqueUs :: UniqSM Unique
- getUs :: UniqSM UniqSupply
Main data type
data UniqSupply Source
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
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
A monad which just gives the ability to obtain Uniques
Instances
class Monad m => MonadUnique m where Source
A monad for generating unique identifiers
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
| MonadUnique UniqSM | |
| MonadUnique TcS | |
| MonadUnique CoreM | |
| MonadUnique SimplM | |
| MonadUnique (IOEnv (Env gbl lcl)) |
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
lazyThenUs :: UniqSM a -> (a -> UniqSM b) -> UniqSM b Source