Safe Haskell	None
Language	Haskell2010

Distribution.Types.UnitId

Synopsis

Documentation

data UnitId Source #

A unit identifier identifies a (possibly instantiated) package/component that can be installed the installed package database. There are several types of components that can be installed:

A traditional library with no holes, so that unitIdHash is Nothing. In the absence of Backpack, UnitId is the same as a ComponentId.
An indefinite, Backpack library with holes. In this case, unitIdHash is still Nothing, but in the install, there are only interfaces, no compiled objects.
An instantiated Backpack library with all the holes filled in. unitIdHash is a Just a hash of the instantiating mapping.

A unit is a component plus the additional information on how the holes are filled in. Thus there is a one to many relationship: for a particular component there are many different ways of filling in the holes, and each different combination is a unit (and has a separate UnitId).

UnitId is distinct from OpenUnitId, in that it is always installed, whereas OpenUnitId are intermediate unit identities that arise during mixin linking, and don't necessarily correspond to any actually installed unit. Since the mapping is not actually recorded in a UnitId, you can't actually substitute over them (but you can substitute over OpenUnitId). See also Distribution.Backpack.FullUnitId for a mechanism for expanding an instantiated UnitId to retrieve its mapping.

Backwards compatibility note: if you need to get the string representation of a UnitId to pass, e.g., as a -package-id flag, use the display function, which will work on all versions of Cabal.

Instances

Eq UnitId #
Methods (==) :: UnitId -> UnitId -> Bool # (/=) :: UnitId -> UnitId -> Bool #
Data UnitId #
Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> UnitId -> c UnitId Source # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c UnitId Source # toConstr :: UnitId -> Constr Source # dataTypeOf :: UnitId -> DataType Source # dataCast1 :: Typeable (* -> ) t => (forall d. Data d => c (t d)) -> Maybe (c UnitId) Source # dataCast2 :: Typeable ( -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c UnitId) Source # gmapT :: (forall b. Data b => b -> b) -> UnitId -> UnitId Source # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> UnitId -> r Source # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> UnitId -> r Source # gmapQ :: (forall d. Data d => d -> u) -> UnitId -> [u] Source # gmapQi :: Int -> (forall d. Data d => d -> u) -> UnitId -> u Source # gmapM :: Monad m => (forall d. Data d => d -> m d) -> UnitId -> m UnitId Source # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> UnitId -> m UnitId Source # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> UnitId -> m UnitId Source #
Ord UnitId #
Methods compare :: UnitId -> UnitId -> Ordering # (<) :: UnitId -> UnitId -> Bool # (<=) :: UnitId -> UnitId -> Bool # (>) :: UnitId -> UnitId -> Bool # (>=) :: UnitId -> UnitId -> Bool # max :: UnitId -> UnitId -> UnitId # min :: UnitId -> UnitId -> UnitId #
Read UnitId #
Methods readsPrec :: Int -> ReadS UnitId Source # readList :: ReadS [UnitId] Source # readPrec :: ReadPrec UnitId Source # readListPrec :: ReadPrec [UnitId] Source #
Show UnitId #
Methods showsPrec :: Int -> UnitId -> ShowS Source # show :: UnitId -> String Source # showList :: [UnitId] -> ShowS Source #
IsString UnitId #	`mkUnitId` Since: 2.0
Methods fromString :: String -> UnitId Source #
Generic UnitId #
Associated Types type Rep UnitId :: * -> * Source # Methods from :: UnitId -> Rep UnitId x Source # to :: Rep UnitId x -> UnitId Source #
NFData UnitId #
Methods rnf :: UnitId -> () Source #
Binary UnitId #
Methods put :: UnitId -> Put Source # get :: Get UnitId Source # putList :: [UnitId] -> Put Source #
Text UnitId #	The textual format for `UnitId` coincides with the format GHC accepts for `-package-id`.
Methods disp :: UnitId -> Doc Source # parse :: ReadP r UnitId Source #
type Rep UnitId #
type Rep UnitId = D1 * (MetaData "UnitId" "Distribution.Types.UnitId" "Cabal-2.0.0.0" True) (C1 * (MetaCons "UnitId" PrefixI False) (S1 * (MetaSel (Nothing Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * ShortText)))

unUnitId :: UnitId -> String Source #

If you need backwards compatibility, consider using display instead, which is supported by all versions of Cabal.

mkUnitId :: String -> UnitId Source #

data DefUnitId Source #

A UnitId for a definite package. The DefUnitId invariant says that a UnitId identified this way is definite; i.e., it has no unfilled holes.

Instances

Eq DefUnitId #
Methods (==) :: DefUnitId -> DefUnitId -> Bool # (/=) :: DefUnitId -> DefUnitId -> Bool #
Data DefUnitId #
Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> DefUnitId -> c DefUnitId Source # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c DefUnitId Source # toConstr :: DefUnitId -> Constr Source # dataTypeOf :: DefUnitId -> DataType Source # dataCast1 :: Typeable (* -> ) t => (forall d. Data d => c (t d)) -> Maybe (c DefUnitId) Source # dataCast2 :: Typeable ( -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c DefUnitId) Source # gmapT :: (forall b. Data b => b -> b) -> DefUnitId -> DefUnitId Source # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> DefUnitId -> r Source # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> DefUnitId -> r Source # gmapQ :: (forall d. Data d => d -> u) -> DefUnitId -> [u] Source # gmapQi :: Int -> (forall d. Data d => d -> u) -> DefUnitId -> u Source # gmapM :: Monad m => (forall d. Data d => d -> m d) -> DefUnitId -> m DefUnitId Source # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> DefUnitId -> m DefUnitId Source # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> DefUnitId -> m DefUnitId Source #
Ord DefUnitId #
Methods compare :: DefUnitId -> DefUnitId -> Ordering # (<) :: DefUnitId -> DefUnitId -> Bool # (<=) :: DefUnitId -> DefUnitId -> Bool # (>) :: DefUnitId -> DefUnitId -> Bool # (>=) :: DefUnitId -> DefUnitId -> Bool # max :: DefUnitId -> DefUnitId -> DefUnitId # min :: DefUnitId -> DefUnitId -> DefUnitId #
Read DefUnitId #
Methods readsPrec :: Int -> ReadS DefUnitId Source # readList :: ReadS [DefUnitId] Source # readPrec :: ReadPrec DefUnitId Source # readListPrec :: ReadPrec [DefUnitId] Source #
Show DefUnitId #
Methods showsPrec :: Int -> DefUnitId -> ShowS Source # show :: DefUnitId -> String Source # showList :: [DefUnitId] -> ShowS Source #
Generic DefUnitId #
Associated Types type Rep DefUnitId :: * -> * Source # Methods from :: DefUnitId -> Rep DefUnitId x Source # to :: Rep DefUnitId x -> DefUnitId Source #
NFData DefUnitId #
Methods rnf :: DefUnitId -> () Source #
Binary DefUnitId #
Methods put :: DefUnitId -> Put Source # get :: Get DefUnitId Source # putList :: [DefUnitId] -> Put Source #
Text DefUnitId #
Methods disp :: DefUnitId -> Doc Source # parse :: ReadP r DefUnitId Source #
type Rep DefUnitId #
type Rep DefUnitId = D1 * (MetaData "DefUnitId" "Distribution.Types.UnitId" "Cabal-2.0.0.0" True) (C1 * (MetaCons "DefUnitId" PrefixI True) (S1 * (MetaSel (Just Symbol "unDefUnitId") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * UnitId)))

unsafeMkDefUnitId :: UnitId -> DefUnitId Source #

Unsafely create a DefUnitId from a UnitId. Your responsibility is to ensure that the DefUnitId invariant holds.

unDefUnitId :: DefUnitId -> UnitId Source #

newSimpleUnitId :: ComponentId -> UnitId Source #

Create a unit identity with no associated hash directly from a ComponentId.

mkLegacyUnitId :: PackageId -> UnitId Source #

Make an old-style UnitId from a package identifier. Assumed to be for the public library

getHSLibraryName :: UnitId -> String Source #

Returns library name prefixed with HS, suitable for filenames

type InstalledPackageId = UnitId Source #

Deprecated: Use UnitId instead