    {-# LANGUAGE BangPatterns        #-}
    {-# LANGUAGE DeriveDataTypeable  #-}
    {-# LANGUAGE DeriveGeneric       #-}
    {-# LANGUAGE ScopedTypeVariables #-}
    -----------------------------------------------------------------------------
    -- |
    -- Module      :  Distribution.ModuleName
    -- Copyright   :  Duncan Coutts 2008
    -- License     :  BSD3
    --
    -- Maintainer  :  cabal-devel@haskell.org
    -- Portability :  portable
    --
    -- Data type for Haskell module names.

    module Distribution.ModuleName (
            ModuleName,
            fromString,
            fromComponents,
            components,
            toFilePath,
            main,
            -- * Internal
            validModuleComponent,
      ) where

    import Distribution.Compat.Prelude
    import Prelude ()

    import Distribution.Parsec
    import Distribution.Pretty
    import Distribution.Utils.ShortText (ShortText, fromShortText, toShortText)
    import System.FilePath              (pathSeparator)

    import qualified Distribution.Compat.CharParsing as P
    import qualified Distribution.Compat.DList       as DList
    import qualified Text.PrettyPrint                as Disp

    -- | A valid Haskell module name.
    --
    newtype ModuleName = ModuleName ShortText
      deriving (ModuleName -> ModuleName -> Bool
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    unModuleName :: ModuleName -> String
    unModuleName :: ModuleName -> String
    unModuleName (ModuleName ShortText
    s) = ShortText -> String
    fromShortText ShortText
    s

    instance Binary ModuleName
    instance Structured ModuleName

    instance NFData ModuleName where
        rnf :: ModuleName -> ()
    rnf (ModuleName ShortText
    ms) = ShortText -> ()
    forall a. NFData a => a -> ()
    rnf ShortText
    ms

    instance Pretty ModuleName where
      pretty :: ModuleName -> Doc
    pretty = String -> Doc
    Disp.text (String -> Doc) -> (ModuleName -> String) -> ModuleName -> Doc
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . ModuleName -> String
    unModuleName

    instance Parsec ModuleName where
        parsec :: forall (m :: * -> *). CabalParsing m => m ModuleName
    parsec = m ModuleName
    forall (m :: * -> *). CabalParsing m => m ModuleName
    parsecModuleName

    parsecModuleName :: forall m. CabalParsing m => m ModuleName
    parsecModuleName :: forall (m :: * -> *). CabalParsing m => m ModuleName
    parsecModuleName = DList Char -> m ModuleName
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    forall a. DList a
    DList.empty where
        upper :: m Char
        !upper :: m Char
    upper = (Char -> Bool) -> m Char
    forall (m :: * -> *). CharParsing m => (Char -> Bool) -> m Char
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    isUpper

        ch :: m Char
        !ch :: m Char
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    c -> Char -> Bool
    validModuleChar Char
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    || Char
    c Char -> Char -> Bool
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    == Char
    '.')

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    alt = m ModuleName -> m ModuleName -> m ModuleName
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    (<|>)

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        state0 :: DList Char -> m ModuleName
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    c)

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        state1 :: DList Char -> m ModuleName
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    return (String -> ModuleName
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    acc))

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        state1' :: DList Char -> m ModuleName
    state1' DList Char
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    c)

    validModuleChar :: Char -> Bool
    validModuleChar :: Char -> Bool
    validModuleChar Char
    c = Char -> Bool
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    == Char
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    validModuleComponent :: String -> Bool
    validModuleComponent :: String -> Bool
    validModuleComponent []     = Bool
    False
    validModuleComponent (Char
    c:String
    cs) = Char -> Bool
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    -- | Construct a 'ModuleName' from a valid module name 'String'.
    --
    -- This is just a convenience function intended for valid module strings. It is
    -- an error if it is used with a string that is not a valid module name. If you
    -- are parsing user input then use 'Distribution.Text.simpleParse' instead.
    --
    instance IsString ModuleName where
        fromString :: String -> ModuleName
    fromString = ShortText -> ModuleName
    ModuleName (ShortText -> ModuleName)
    -> (String -> ShortText) -> String -> ModuleName
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . String -> ShortText
    toShortText

    -- | Construct a 'ModuleName' from valid module components, i.e. parts
    -- separated by dots.
    fromComponents :: [String] -> ModuleName
    fromComponents :: [String] -> ModuleName
    fromComponents [String]
    comps = String -> ModuleName
    forall a. IsString a => String -> a
    fromString (String -> [String] -> String
    forall a. [a] -> [[a]] -> [a]
    intercalate String
    "." [String]
    comps)
    {-# DEPRECATED fromComponents "Exists for cabal-install only" #-}

    -- | The module name @Main@.
    --
    main :: ModuleName
    main :: ModuleName
    main = ShortText -> ModuleName
    ModuleName (String -> ShortText
    forall a. IsString a => String -> a
    fromString String
    "Main")

    -- | The individual components of a hierarchical module name. For example
    --
    -- > components (fromString "A.B.C") = ["A", "B", "C"]
    --
    components :: ModuleName -> [String]
    components :: ModuleName -> [String]
    components ModuleName
    mn = String -> [String]
    split (ModuleName -> String
    unModuleName ModuleName
    mn)
      where
        split :: String -> [String]
    split String
    cs = case (Char -> Bool) -> String -> (String, String)
    forall a. (a -> Bool) -> [a] -> ([a], [a])
    break (Char -> Char -> Bool
    forall a. Eq a => a -> a -> Bool
    ==Char
    '.') String
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          (String
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    forall a. a -> [a] -> [a]
    : []
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    chunk,Char
    _:String
    rest) -> String
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    forall a. a -> [a] -> [a]
    : String -> [String]
    split String
    rest

    -- | Convert a module name to a file path, but without any file extension.
    -- For example:
    --
    -- > toFilePath (fromString "A.B.C") = "A/B/C"
    --
    toFilePath :: ModuleName -> FilePath
    toFilePath :: ModuleName -> String
    toFilePath = (Char -> Char) -> ShowS
    forall a b. (a -> b) -> [a] -> [b]
    map Char -> Char
    f ShowS -> (ModuleName -> String) -> ModuleName -> String
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . ModuleName -> String
    unModuleName where
        f :: Char -> Char
    f Char
    '.' = Char
    pathSeparator
        f Char
    c   = Char
    c