GHC.Check.PackageDb

Discover the GHC version via the package database. Requirements:

• the package database must be compatible, which is usually not the case across major ghc versions.
• the ghc package is registered, which is not always the case.

Documentation

data PackageVersion

Instances

Eq PackageVersion

Defined in GHC.Check.PackageDb

Methods

(==) :: PackageVersion -> PackageVersion -> Bool

(/=) :: PackageVersion -> PackageVersion -> Bool

Show PackageVersion

Defined in GHC.Check.PackageDb

Methods

showsPrec :: Int -> PackageVersion -> ShowS

show :: PackageVersion -> String

showList :: [PackageVersion] -> ShowS

Lift PackageVersion

Defined in GHC.Check.PackageDb

Methods

lift :: PackageVersion -> Q Exp

liftTyped :: PackageVersion -> Q (TExp PackageVersion)

version :: PackageVersion -> Version

getPackageVersion :: String -> Ghc (Maybe PackageVersion)

getPackageVersion p returns the version of package p that will be used in the Ghc session.

fromVersionString :: HasCallStack => String -> PackageVersion