Safe Haskell	Safe-Inferred
Language	Haskell2010

Distribution.Types.UnitId

Synopsis

data UnitId
unUnitId :: UnitId -> String
mkUnitId :: String -> UnitId
data DefUnitId
unsafeMkDefUnitId :: UnitId -> DefUnitId
unDefUnitId :: DefUnitId -> UnitId
newSimpleUnitId :: ComponentId -> UnitId
mkLegacyUnitId :: PackageId -> UnitId
getHSLibraryName :: UnitId -> String

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

Instances details

Parsec UnitId Source #	The textual format for `UnitId` coincides with the format GHC accepts for `-package-id`.
Instance details Defined in Distribution.Types.UnitId Methods parsec :: CabalParsing m => m UnitId Source #
Pretty UnitId Source #	The textual format for `UnitId` coincides with the format GHC accepts for `-package-id`.
Instance details Defined in Distribution.Types.UnitId Methods pretty :: UnitId -> Doc Source # prettyVersioned :: CabalSpecVersion -> UnitId -> Doc Source #
Structured UnitId Source #
Instance details Defined in Distribution.Types.UnitId Methods structure :: Proxy UnitId -> Structure Source # structureHash' :: Tagged UnitId MD5
Data UnitId Source #
Instance details Defined in Distribution.Types.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 :: forall r r'. (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 #
IsString UnitId Source #	`mkUnitId` Since: Cabal-syntax-2.0.0.2
Instance details Defined in Distribution.Types.UnitId Methods fromString :: String -> UnitId Source #
Generic UnitId Source #
Instance details Defined in Distribution.Types.UnitId Associated Types type Rep UnitId :: Type -> Type Source # Methods from :: UnitId -> Rep UnitId x Source # to :: Rep UnitId x -> UnitId Source #
Read UnitId Source #
Instance details Defined in Distribution.Types.UnitId Methods readsPrec :: Int -> ReadS UnitId Source # readList :: ReadS [UnitId] Source # readPrec :: ReadPrec UnitId Source # readListPrec :: ReadPrec [UnitId] Source #
Show UnitId Source #
Instance details Defined in Distribution.Types.UnitId Methods showsPrec :: Int -> UnitId -> ShowS Source # show :: UnitId -> String Source # showList :: [UnitId] -> ShowS Source #
Binary UnitId Source #
Instance details Defined in Distribution.Types.UnitId Methods put :: UnitId -> Put Source # get :: Get UnitId Source # putList :: [UnitId] -> Put Source #
NFData UnitId Source #
Instance details Defined in Distribution.Types.UnitId Methods rnf :: UnitId -> () Source #
Eq UnitId Source #
Instance details Defined in Distribution.Types.UnitId Methods (==) :: UnitId -> UnitId -> Bool # (/=) :: UnitId -> UnitId -> Bool #
Ord UnitId Source #
Instance details Defined in Distribution.Types.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 #
type Rep UnitId Source #
Instance details Defined in Distribution.Types.UnitId type Rep UnitId = D1 ('MetaData "UnitId" "Distribution.Types.UnitId" "Cabal-syntax-3.8.0.20220526" 'True) (C1 ('MetaCons "UnitId" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe 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

Instances details

Parsec DefUnitId Source #
Instance details Defined in Distribution.Types.UnitId Methods parsec :: CabalParsing m => m DefUnitId Source #
Pretty DefUnitId Source #
Instance details Defined in Distribution.Types.UnitId Methods pretty :: DefUnitId -> Doc Source # prettyVersioned :: CabalSpecVersion -> DefUnitId -> Doc Source #
Structured DefUnitId Source #
Instance details Defined in Distribution.Types.UnitId Methods structure :: Proxy DefUnitId -> Structure Source # structureHash' :: Tagged DefUnitId MD5
Data DefUnitId Source #
Instance details Defined in Distribution.Types.UnitId 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 :: forall r r'. (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 #
Generic DefUnitId Source #
Instance details Defined in Distribution.Types.UnitId Associated Types type Rep DefUnitId :: Type -> Type Source # Methods from :: DefUnitId -> Rep DefUnitId x Source # to :: Rep DefUnitId x -> DefUnitId Source #
Read DefUnitId Source #
Instance details Defined in Distribution.Types.UnitId Methods readsPrec :: Int -> ReadS DefUnitId Source # readList :: ReadS [DefUnitId] Source # readPrec :: ReadPrec DefUnitId Source # readListPrec :: ReadPrec [DefUnitId] Source #
Show DefUnitId Source #
Instance details Defined in Distribution.Types.UnitId Methods showsPrec :: Int -> DefUnitId -> ShowS Source # show :: DefUnitId -> String Source # showList :: [DefUnitId] -> ShowS Source #
Binary DefUnitId Source #
Instance details Defined in Distribution.Types.UnitId Methods put :: DefUnitId -> Put Source # get :: Get DefUnitId Source # putList :: [DefUnitId] -> Put Source #
NFData DefUnitId Source #
Instance details Defined in Distribution.Types.UnitId Methods rnf :: DefUnitId -> () Source #
Eq DefUnitId Source #
Instance details Defined in Distribution.Types.UnitId Methods (==) :: DefUnitId -> DefUnitId -> Bool # (/=) :: DefUnitId -> DefUnitId -> Bool #
Ord DefUnitId Source #
Instance details Defined in Distribution.Types.UnitId 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 #
type Rep DefUnitId Source #
Instance details Defined in Distribution.Types.UnitId type Rep DefUnitId = D1 ('MetaData "DefUnitId" "Distribution.Types.UnitId" "Cabal-syntax-3.8.0.20220526" 'True) (C1 ('MetaCons "DefUnitId" 'PrefixI 'True) (S1 ('MetaSel ('Just "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