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|
{-# LANGUAGE KindSignatures #-}
{-# LANGUAGE ConstraintKinds #-}
{-# LANGUAGE MultiParamTypeClasses #-}
-- | The 'TPipelineClass' and 'MonadUse' classes and associated types
module GHC.Driver.Pipeline.Monad (
TPipelineClass, MonadUse(..)
, PipeEnv(..)
, PipelineOutput(..)
) where
import GHC.Prelude
import Control.Monad.IO.Class
import qualified Data.Kind as K
import GHC.Driver.Phases
import GHC.Utils.TmpFs
-- The interface that the pipeline monad must implement.
type TPipelineClass (f :: K.Type -> K.Type) (m :: K.Type -> K.Type)
= (Functor m, MonadIO m, Applicative m, Monad m, MonadUse f m)
-- | Lift a `f` action into an `m` action.
class MonadUse f m where
use :: f a -> m a
-- PipeEnv: invariant information passed down through the pipeline
data PipeEnv = PipeEnv {
stop_phase :: StopPhase, -- ^ Stop just after this phase
src_filename :: String, -- ^ basename of original input source
src_basename :: String, -- ^ basename of original input source
src_suffix :: String, -- ^ its extension
output_spec :: PipelineOutput -- ^ says where to put the pipeline output
}
data PipelineOutput
= Temporary TempFileLifetime
-- ^ Output should be to a temporary file: we're going to
-- run more compilation steps on this output later.
| Persistent
-- ^ We want a persistent file, i.e. a file in the current directory
-- derived from the input filename, but with the appropriate extension.
-- eg. in "ghc -c Foo.hs" the output goes into ./Foo.o.
| SpecificFile
-- ^ The output must go into the specific outputFile in DynFlags.
-- We don't store the filename in the constructor as it changes
-- when doing -dynamic-too.
| NoOutputFile
-- ^ No output should be created, like in Interpreter or NoBackend.
deriving Show
|
