A version constraint on a package. Different from ExeDependency and
Dependency since it does not specify the need for a component, not even
the main library.
There are a few places in the codebase where Dependency was used where
PackageVersionConstraint is not used instead (#5570).
Constructors
Instances11Eq, Data, Read, Show, Generic, NFData, …
Eq PackageVersionConstraintDefined in Cabal-syntax-3.18.1.0 · Distribution.Types.PackageVersionConstraintData PackageVersionConstraintDefined in Cabal-syntax-3.18.1.0 · Distribution.Types.PackageVersionConstraintRead PackageVersionConstraintDefined in Cabal-syntax-3.18.1.0 · Distribution.Types.PackageVersionConstraintShow PackageVersionConstraintDefined in Cabal-syntax-3.18.1.0 · Distribution.Types.PackageVersionConstraintGeneric PackageVersionConstraintDefined in Cabal-syntax-3.18.1.0 · Distribution.Types.PackageVersionConstraintNFData PackageVersionConstraintDefined in Cabal-syntax-3.18.1.0 · Distribution.Types.PackageVersionConstraintBinary PackageVersionConstraintDefined in Cabal-syntax-3.18.1.0 · Distribution.Types.PackageVersionConstraintParsec PackageVersionConstraintDefined in Cabal-syntax-3.18.1.0 · Distribution.Types.PackageVersionConstraintExample1 expression simpleParsec "foo" :: Maybe PackageVersionConstraintJust (PackageVersionConstraint (PackageName "foo") (OrLaterVersion (mkVersion [0])))
Example1 expression simpleParsec "foo >=2.0" :: Maybe PackageVersionConstraintJust (PackageVersionConstraint (PackageName "foo") (OrLaterVersion (mkVersion [2,0])))
Example1 expression simpleParsec "foo-2.0" :: Maybe PackageVersionConstraintJust (PackageVersionConstraint (PackageName "foo") (ThisVersion (mkVersion [2,0])))
Pretty PackageVersionConstraintDefined in Cabal-syntax-3.18.1.0 · Distribution.Types.PackageVersionConstraintStructured PackageVersionConstraintDefined in Cabal-syntax-3.18.1.0 · Distribution.Types.PackageVersionConstrainttype Rep PackageVersionConstraint = D1 ('MetaDataDefined in Cabal-syntax-3.18.1.0 · Distribution.Types.PackageVersionConstraint"PackageVersionConstraint"
"Distribution.Types.PackageVersionConstraint"
"Cabal-syntax-3.18.1.0-046d"
'False) (C1 ('MetaCons"PackageVersionConstraint"
'PrefixI 'False) (S1 ('MetaSel 'Nothing 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 PackageName) :*: S1 ('MetaSel 'Nothing 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 VersionRange)))