{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE DeriveGeneric #-}

module Distribution.Types.LibraryName (
  LibraryName(..),
  defaultLibName,
  maybeToLibraryName,
  showLibraryName,
  libraryNameStanza,
  libraryNameString,
  -- * Pretty & Parse
  prettyLibraryNameComponent,
  parsecLibraryNameComponent,
  ) where

import Prelude ()
import Distribution.Compat.Prelude

import Distribution.Types.UnqualComponentName
import Distribution.Pretty
import Distribution.Parsec

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

data LibraryName = LMainLibName
                 | LSubLibName UnqualComponentName
                 deriving (LibraryName -> LibraryName -> Bool
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Data)

instance Binary LibraryName
instance NFData LibraryName where rnf :: LibraryName -> ()
rnf = LibraryName -> ()
forall a. (Generic a, GNFData (Rep a)) => a -> ()
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-- | Pretty print 'LibraryName' in build-target-ish syntax.
--
-- /Note:/ there are no 'Pretty' or 'Parsec' instances,
-- as there's other way to represent 'LibraryName', namely as bare
-- 'UnqualComponentName'. 
prettyLibraryNameComponent :: LibraryName -> Disp.Doc
prettyLibraryNameComponent :: LibraryName -> Doc
prettyLibraryNameComponent LibraryName
LMainLibName      = String -> Doc
Disp.text String
"lib"
prettyLibraryNameComponent (LSubLibName UnqualComponentName
str) = String -> Doc
Disp.text String
"lib:" Doc -> Doc -> Doc
<<>> UnqualComponentName -> Doc
forall a. Pretty a => a -> Doc
pretty UnqualComponentName
str

parsecLibraryNameComponent :: CabalParsing m => m LibraryName
parsecLibraryNameComponent :: m LibraryName
parsecLibraryNameComponent = do
    String
_ <- String -> m String
forall (m :: * -> *). CharParsing m => String -> m String
P.string String
"lib"
    m LibraryName
parseComposite m LibraryName -> m LibraryName -> m LibraryName
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<|> m LibraryName
parseSingle
  where
    parseSingle :: m LibraryName
parseSingle = LibraryName -> m LibraryName
forall (m :: * -> *) a. Monad m => a -> m a
return LibraryName
LMainLibName
    parseComposite :: m LibraryName
parseComposite = do
        Char
_ <- Char -> m Char
forall (m :: * -> *). CharParsing m => Char -> m Char
P.char Char
':'
        UnqualComponentName -> LibraryName
LSubLibName (UnqualComponentName -> LibraryName)
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parsec

defaultLibName :: LibraryName
defaultLibName :: LibraryName
defaultLibName = LibraryName
LMainLibName

showLibraryName :: LibraryName -> String
showLibraryName :: LibraryName -> String
showLibraryName LibraryName
LMainLibName       = String
"library"
showLibraryName (LSubLibName UnqualComponentName
name) = String
"library '" String -> ShowS
forall a. [a] -> [a] -> [a]
++ UnqualComponentName -> String
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++ String
"'"

libraryNameStanza :: LibraryName -> String
libraryNameStanza :: LibraryName -> String
libraryNameStanza LibraryName
LMainLibName       = String
"library"
libraryNameStanza (LSubLibName UnqualComponentName
name) = String
"library " String -> ShowS
forall a. [a] -> [a] -> [a]
++ UnqualComponentName -> String
forall a. Pretty a => a -> String
prettyShow UnqualComponentName
name

libraryNameString :: LibraryName -> Maybe UnqualComponentName
libraryNameString :: LibraryName -> Maybe UnqualComponentName
libraryNameString LibraryName
LMainLibName = Maybe UnqualComponentName
forall a. Maybe a
Nothing
libraryNameString (LSubLibName UnqualComponentName
n) = UnqualComponentName -> Maybe UnqualComponentName
forall a. a -> Maybe a
Just UnqualComponentName
n

-- | Convert the 'UnqualComponentName' of a library into a
-- 'LibraryName'.
maybeToLibraryName :: Maybe UnqualComponentName -> LibraryName
maybeToLibraryName :: Maybe UnqualComponentName -> LibraryName
maybeToLibraryName Maybe UnqualComponentName
Nothing = LibraryName
LMainLibName
maybeToLibraryName (Just UnqualComponentName
n) = UnqualComponentName -> LibraryName
LSubLibName UnqualComponentName
n