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

module Distribution.Types.ComponentId
  ( ComponentId, unComponentId, mkComponentId
  ) where

import Prelude ()
import Distribution.Compat.Prelude
import Distribution.Utils.ShortText

import Distribution.Pretty
import Distribution.Parsec

import qualified Distribution.Compat.CharParsing as P
import Text.PrettyPrint (text)

-- | A 'ComponentId' uniquely identifies the transitive source
-- code closure of a component (i.e. libraries, executables).
--
-- For non-Backpack components, this corresponds one to one with
-- the 'UnitId', which serves as the basis for install paths,
-- linker symbols, etc.
--
-- Use 'mkComponentId' and 'unComponentId' to convert from/to a
-- 'String'.
--
-- This type is opaque since @Cabal-2.0@
--
-- @since 2.0.0.2
newtype ComponentId = ComponentId ShortText
    deriving ((forall x. ComponentId -> Rep ComponentId x)
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-- | Construct a 'ComponentId' from a 'String'
--
-- 'mkComponentId' is the inverse to 'unComponentId'
--
-- Note: No validations are performed to ensure that the resulting
-- 'ComponentId' is valid
--
-- @since 2.0.0.2
mkComponentId :: String -> ComponentId
mkComponentId :: String -> ComponentId
mkComponentId = ShortText -> ComponentId
ComponentId (ShortText -> ComponentId)
-> (String -> ShortText) -> String -> ComponentId
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toShortText

-- | Convert 'ComponentId' to 'String'
--
-- @since 2.0.0.2
unComponentId :: ComponentId -> String
unComponentId :: ComponentId -> String
unComponentId (ComponentId ShortText
s) = ShortText -> String
fromShortText ShortText
s

-- | 'mkComponentId'
--
-- @since 2.0.0.2
instance IsString ComponentId where
    fromString :: String -> ComponentId
fromString = String -> ComponentId
mkComponentId

instance Binary ComponentId

instance Pretty ComponentId where
  pretty :: ComponentId -> Doc
pretty = String -> Doc
text (String -> Doc) -> (ComponentId -> String) -> ComponentId -> Doc
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ComponentId -> String
unComponentId

instance Parsec ComponentId where
  parsec :: m ComponentId
parsec = String -> ComponentId
mkComponentId (String -> ComponentId) -> m String -> m ComponentId
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    rnf :: ComponentId -> ()
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unComponentId