    {-# LANGUAGE DeriveDataTypeable #-}
    {-# LANGUAGE DeriveGeneric      #-}
    module Distribution.Types.MungedPackageId
      ( MungedPackageId(..)
      , computeCompatPackageId
      ) where

    import Distribution.Compat.Prelude
    import Prelude ()

    import Distribution.Parsec
    import Distribution.Pretty
    import Distribution.Types.LibraryName
    import Distribution.Types.MungedPackageName
    import Distribution.Types.PackageId
    import Distribution.Version                 (Version, nullVersion)

    import qualified Text.PrettyPrint as Disp

    -- | A simple pair of a 'MungedPackageName' and 'Version'. 'MungedPackageName' is to
    -- 'MungedPackageId' as 'PackageName' is to 'PackageId'. See 'MungedPackageName' for more
    -- info.
    data MungedPackageId
        = MungedPackageId {
            -- | The combined package and component name. see documentation for
            -- 'MungedPackageName'.
            MungedPackageId -> MungedPackageName
    mungedName    :: MungedPackageName,
            -- | The version of this package / component, eg 1.2
            MungedPackageId -> Version
    mungedVersion :: Version
         }
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    instance Binary MungedPackageId
    instance Structured MungedPackageId

    -- |
    --
    -- >>> prettyShow $ MungedPackageId (MungedPackageName "servant" LMainLibName) (mkVersion [1,2,3])
    -- "servant-1.2.3"
    --
    -- >>> prettyShow $ MungedPackageId (MungedPackageName "servant" (LSubLibName "lackey")) (mkVersion [0,1,2])
    -- "z-servant-z-lackey-0.1.2"
    --
    instance Pretty MungedPackageId where
        pretty :: MungedPackageId -> Doc
    pretty (MungedPackageId MungedPackageName
    n Version
    v)
            | Version
    v Version -> Version -> Bool
    forall a. Eq a => a -> a -> Bool
    == Version
    nullVersion = MungedPackageName -> Doc
    forall a. Pretty a => a -> Doc
    pretty MungedPackageName
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            | Bool
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    -- |
    --
    -- >>> simpleParsec "foo-bar-0" :: Maybe MungedPackageId
    -- Just (MungedPackageId {mungedName = MungedPackageName (PackageName "foo-bar") LMainLibName, mungedVersion = mkVersion [0]})
    --
    -- >>> simpleParsec "foo-bar" :: Maybe MungedPackageId
    -- Just (MungedPackageId {mungedName = MungedPackageName (PackageName "foo-bar") LMainLibName, mungedVersion = mkVersion []})
    --
    -- >>> simpleParsec "z-foo-bar-z-baz-0" :: Maybe MungedPackageId
    -- Just (MungedPackageId {mungedName = MungedPackageName (PackageName "foo-bar") (LSubLibName (UnqualComponentName "baz")), mungedVersion = mkVersion [0]})
    --
    -- >>> simpleParsec "foo-bar-0-0" :: Maybe MungedPackageId
    -- Nothing
    --
    -- >>> simpleParsec "foo-bar.0" :: Maybe MungedPackageId
    -- Nothing
    --
    -- >>> simpleParsec "foo-bar.4-2" :: Maybe MungedPackageId
    -- Nothing
    --
    instance Parsec MungedPackageId where
        parsec :: forall (m :: * -> *). CabalParsing m => m MungedPackageId
    parsec = do
            PackageIdentifier PackageName
    pn Version
    v <- m PackageIdentifier
    forall a (m :: * -> *). (Parsec a, CabalParsing m) => m a
    parsec
            MungedPackageId -> m MungedPackageId
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    return (MungedPackageId -> m MungedPackageId)
    -> MungedPackageId -> m MungedPackageId
    forall a b. (a -> b) -> a -> b
    $ MungedPackageName -> Version -> MungedPackageId
    MungedPackageId (PackageName -> MungedPackageName
    decodeCompatPackageName PackageName
    pn) Version
    v

    instance NFData MungedPackageId where
        rnf :: MungedPackageId -> ()
    rnf (MungedPackageId MungedPackageName
    name Version
    version) = MungedPackageName -> ()
    forall a. NFData a => a -> ()
    rnf MungedPackageName
    name () -> () -> ()
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    rnf Version
    version

    computeCompatPackageId :: PackageId -> LibraryName -> MungedPackageId
    computeCompatPackageId :: PackageIdentifier -> LibraryName -> MungedPackageId
    computeCompatPackageId (PackageIdentifier PackageName
    pn Version
    vr) LibraryName
    ln =
        MungedPackageName -> Version -> MungedPackageId
    MungedPackageId (PackageName -> LibraryName -> MungedPackageName
    MungedPackageName PackageName
    pn LibraryName
    ln) Version
    vr

    -- $setup
    -- >>> :seti -XOverloadedStrings
    -- >>> import Distribution.Types.Version