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

module Distribution.Types.IncludeRenaming (
    IncludeRenaming(..),
    defaultIncludeRenaming,
    isDefaultIncludeRenaming,
) where

import Distribution.Compat.Prelude
import Prelude ()

import Distribution.Types.ModuleRenaming

import qualified Distribution.Compat.CharParsing as P
import           Distribution.Parsec
import           Distribution.Pretty
import           Text.PrettyPrint           (text, (<+>))
import qualified Text.PrettyPrint           as Disp

-- ---------------------------------------------------------------------------
-- Module renaming

-- | A renaming on an include: (provides renaming, requires renaming)
data IncludeRenaming
    = IncludeRenaming {
        IncludeRenaming -> ModuleRenaming
includeProvidesRn :: ModuleRenaming,
        IncludeRenaming -> ModuleRenaming
includeRequiresRn :: ModuleRenaming
    }
    deriving (Int -> IncludeRenaming -> ShowS
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instance Binary IncludeRenaming

instance NFData IncludeRenaming where rnf :: IncludeRenaming -> ()
rnf = IncludeRenaming -> ()
forall a. (Generic a, GNFData (Rep a)) => a -> ()
genericRnf

-- | The 'defaultIncludeRenaming' applied when you only @build-depends@
-- on a package.
defaultIncludeRenaming :: IncludeRenaming
defaultIncludeRenaming :: IncludeRenaming
defaultIncludeRenaming = ModuleRenaming -> ModuleRenaming -> IncludeRenaming
IncludeRenaming ModuleRenaming
defaultRenaming ModuleRenaming
defaultRenaming

-- | Is an 'IncludeRenaming' the default one?
isDefaultIncludeRenaming :: IncludeRenaming -> Bool
isDefaultIncludeRenaming :: IncludeRenaming -> Bool
isDefaultIncludeRenaming (IncludeRenaming ModuleRenaming
p ModuleRenaming
r) = ModuleRenaming -> Bool
isDefaultRenaming ModuleRenaming
p Bool -> Bool -> Bool
&& ModuleRenaming -> Bool
isDefaultRenaming ModuleRenaming
r

instance Pretty IncludeRenaming where
    pretty :: IncludeRenaming -> Doc
pretty (IncludeRenaming ModuleRenaming
prov_rn ModuleRenaming
req_rn) =
        ModuleRenaming -> Doc
forall a. Pretty a => a -> Doc
pretty ModuleRenaming
prov_rn
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isDefaultRenaming ModuleRenaming
req_rn
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text String
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instance Parsec IncludeRenaming where
    parsec :: m IncludeRenaming
parsec = do
        ModuleRenaming
prov_rn <- m ModuleRenaming
forall a (m :: * -> *). (Parsec a, CabalParsing m) => m a
parsec
        ModuleRenaming
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parsec
        -- Requirements don't really care if they're mentioned
        -- or not (since you can't thin a requirement.)  But
        -- we have a little hack in Configure to combine
        -- the provisions and requirements together before passing
        -- them to GHC, and so the most neutral choice for a requirement
        -- is for the "with" field to be False, so we correctly
        -- thin provisions.
        IncludeRenaming -> m IncludeRenaming
forall (m :: * -> *) a. Monad m => a -> m a
return (ModuleRenaming -> ModuleRenaming -> IncludeRenaming
IncludeRenaming ModuleRenaming
prov_rn ModuleRenaming
req_rn)