License	BSD-style
Maintainer	foundation
Stability	experimental
Portability	portable
Safe Haskell	Safe-Inferred
Language	Haskell2010

Foundation.System.Info

Contents

Operation System info
CPU info
Compiler info

Description

Synopsis

data OS
- = Windows
- | OSX
- | Linux
- | Android
- | BSD
os :: Either [Char] OS
data Arch
- = I386
- | X86_64
- | PowerPC
- | PowerPC64
- | Sparc
- | Sparc64
- | ARM
- | ARM64
arch :: Either [Char] Arch
cpus :: IO Int
data Endianness
- = LittleEndian
- | BigEndian
endianness :: Endianness
compilerName :: String
compilerVersion :: Version
data Version = Version {
- versionBranch :: [Int]
- versionTags :: [String]
}

Operation System info

data OS Source #

Constructors

Windows
OSX
Linux
Android
BSD

Instances

Instances details

Data OS Source #
Instance details Defined in Foundation.System.Info Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> OS -> c OS # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c OS # toConstr :: OS -> Constr # dataTypeOf :: OS -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c OS) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c OS) # gmapT :: (forall b. Data b => b -> b) -> OS -> OS # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> OS -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> OS -> r # gmapQ :: (forall d. Data d => d -> u) -> OS -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> OS -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> OS -> m OS # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> OS -> m OS # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> OS -> m OS #
Bounded OS Source #
Instance details Defined in Foundation.System.Info Methods minBound :: OS # maxBound :: OS #
Enum OS Source #
Instance details Defined in Foundation.System.Info Methods succ :: OS -> OS # pred :: OS -> OS # toEnum :: Int -> OS # fromEnum :: OS -> Int # enumFrom :: OS -> [OS] # enumFromThen :: OS -> OS -> [OS] # enumFromTo :: OS -> OS -> [OS] # enumFromThenTo :: OS -> OS -> OS -> [OS] #
Show OS Source #
Instance details Defined in Foundation.System.Info Methods showsPrec :: Int -> OS -> ShowS # show :: OS -> String # showList :: [OS] -> ShowS #
Eq OS Source #
Instance details Defined in Foundation.System.Info Methods (==) :: OS -> OS -> Bool # (/=) :: OS -> OS -> Bool #
Ord OS Source #
Instance details Defined in Foundation.System.Info Methods compare :: OS -> OS -> Ordering # (<) :: OS -> OS -> Bool # (<=) :: OS -> OS -> Bool # (>) :: OS -> OS -> Bool # (>=) :: OS -> OS -> Bool # max :: OS -> OS -> OS # min :: OS -> OS -> OS #

os :: Either [Char] OS Source #

get the operating system on which the program is running.

Either return the known OS or a strict String of the OS name.

This function uses the base's os function.

CPU info

data Arch Source #

Enumeration of the known GHC supported architecture.

Constructors

I386
X86_64
PowerPC
PowerPC64
Sparc
Sparc64
ARM
ARM64

Instances

Instances details

Data Arch Source #
Instance details Defined in Foundation.System.Info Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Arch -> c Arch # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Arch # toConstr :: Arch -> Constr # dataTypeOf :: Arch -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Arch) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Arch) # gmapT :: (forall b. Data b => b -> b) -> Arch -> Arch # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Arch -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Arch -> r # gmapQ :: (forall d. Data d => d -> u) -> Arch -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Arch -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Arch -> m Arch # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Arch -> m Arch # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Arch -> m Arch #
Bounded Arch Source #
Instance details Defined in Foundation.System.Info Methods minBound :: Arch # maxBound :: Arch #
Enum Arch Source #
Instance details Defined in Foundation.System.Info Methods succ :: Arch -> Arch # pred :: Arch -> Arch # toEnum :: Int -> Arch # fromEnum :: Arch -> Int # enumFrom :: Arch -> [Arch] # enumFromThen :: Arch -> Arch -> [Arch] # enumFromTo :: Arch -> Arch -> [Arch] # enumFromThenTo :: Arch -> Arch -> Arch -> [Arch] #
Show Arch Source #
Instance details Defined in Foundation.System.Info Methods showsPrec :: Int -> Arch -> ShowS # show :: Arch -> String # showList :: [Arch] -> ShowS #
Eq Arch Source #
Instance details Defined in Foundation.System.Info Methods (==) :: Arch -> Arch -> Bool # (/=) :: Arch -> Arch -> Bool #
Ord Arch Source #
Instance details Defined in Foundation.System.Info Methods compare :: Arch -> Arch -> Ordering # (<) :: Arch -> Arch -> Bool # (<=) :: Arch -> Arch -> Bool # (>) :: Arch -> Arch -> Bool # (>=) :: Arch -> Arch -> Bool # max :: Arch -> Arch -> Arch # min :: Arch -> Arch -> Arch #

arch :: Either [Char] Arch Source #

get the machine architecture on which the program is running

Either return the known architecture or a Strict String of the architecture name.

This function uses the base's arch function.

cpus :: IO Int Source #

returns the number of CPUs the machine has

data Endianness Source #

Constructors

LittleEndian
BigEndian

Instances

Instances details

Show Endianness
Instance details Defined in Basement.Endianness Methods showsPrec :: Int -> Endianness -> ShowS # show :: Endianness -> String # showList :: [Endianness] -> ShowS #
Eq Endianness
Instance details Defined in Basement.Endianness Methods (==) :: Endianness -> Endianness -> Bool # (/=) :: Endianness -> Endianness -> Bool #

endianness :: Endianness Source #

endianness of the current architecture

Compiler info

compilerName :: String Source #

get the compiler name

get the compilerName from base package but convert it into a strict String

compilerVersion :: Version #

The version of compilerName with which the program was compiled or is being interpreted.

Example

Expand

ghci> compilerVersion
Version {versionBranch = [8,8], versionTags = []}

data Version #

A Version represents the version of a software entity.

An instance of Eq is provided, which implements exact equality modulo reordering of the tags in the versionTags field.

An instance of Ord is also provided, which gives lexicographic ordering on the versionBranch fields (i.e. 2.1 > 2.0, 1.2.3 > 1.2.2, etc.). This is expected to be sufficient for many uses, but note that you may need to use a more specific ordering for your versioning scheme. For example, some versioning schemes may include pre-releases which have tags "pre1", "pre2", and so on, and these would need to be taken into account when determining ordering. In some cases, date ordering may be more appropriate, so the application would have to look for date tags in the versionTags field and compare those. The bottom line is, don't always assume that compare and other Ord operations are the right thing for every Version.

Similarly, concrete representations of versions may differ. One possible concrete representation is provided (see showVersion and parseVersion), but depending on the application a different concrete representation may be more appropriate.

Constructors

Version

Fields

versionBranch :: [Int]
The numeric branch for this version. This reflects the fact that most software versions are tree-structured; there is a main trunk which is tagged with versions at various points (1,2,3...), and the first branch off the trunk after version 3 is 3.1, the second branch off the trunk after version 3 is 3.2, and so on. The tree can be branched arbitrarily, just by adding more digits.
We represent the branch as a list of Int, so version 3.2.1 becomes [3,2,1]. Lexicographic ordering (i.e. the default instance of Ord for [Int]) gives the natural ordering of branches.
versionTags :: [String]
A version can be tagged with an arbitrary list of strings. The interpretation of the list of tags is entirely dependent on the entity that this version applies to.

Instances

Instances details

Data Version	Since: base-4.7.0.0
Instance details Defined in Data.Data Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Version -> c Version # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Version # toConstr :: Version -> Constr # dataTypeOf :: Version -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Version) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Version) # gmapT :: (forall b. Data b => b -> b) -> Version -> Version # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Version -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Version -> r # gmapQ :: (forall d. Data d => d -> u) -> Version -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Version -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Version -> m Version # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Version -> m Version # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Version -> m Version #
Generic Version
Instance details Defined in Data.Version Associated Types type Rep Version :: Type -> Type # Methods from :: Version -> Rep Version x # to :: Rep Version x -> Version #
IsList Version	Since: base-4.8.0.0
Instance details Defined in GHC.IsList Associated Types type Item Version # Methods fromList :: [Item Version] -> Version # fromListN :: Int -> [Item Version] -> Version # toList :: Version -> [Item Version] #
Read Version	Since: base-2.1
Instance details Defined in Data.Version Methods readsPrec :: Int -> ReadS Version # readList :: ReadS [Version] # readPrec :: ReadPrec Version # readListPrec :: ReadPrec [Version] #
Show Version	Since: base-2.1
Instance details Defined in Data.Version Methods showsPrec :: Int -> Version -> ShowS # show :: Version -> String # showList :: [Version] -> ShowS #
Eq Version	Since: base-2.1
Instance details Defined in Data.Version Methods (==) :: Version -> Version -> Bool # (/=) :: Version -> Version -> Bool #
Ord Version	Since: base-2.1
Instance details Defined in Data.Version Methods compare :: Version -> Version -> Ordering # (<) :: Version -> Version -> Bool # (<=) :: Version -> Version -> Bool # (>) :: Version -> Version -> Bool # (>=) :: Version -> Version -> Bool # max :: Version -> Version -> Version # min :: Version -> Version -> Version #
type Rep Version	Since: base-4.9.0.0
Instance details Defined in Data.Version type Rep Version = D1 ('MetaData "Version" "Data.Version" "base" 'False) (C1 ('MetaCons "Version" 'PrefixI 'True) (S1 ('MetaSel ('Just "versionBranch") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [Int]) :*: S1 ('MetaSel ('Just "versionTags") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [String])))
type Item Version
Instance details Defined in GHC.IsList type Item Version = Int