ghc-mod/Language/Haskell/GhcMod/Check.hs

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module Language.Haskell.GhcMod.Check (
checkSyntax
, check
, expandTemplate
, expand
) where
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import Control.Applicative ((<$>))
import Language.Haskell.GhcMod.DynFlags
import qualified Language.Haskell.GhcMod.Gap as Gap
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import Language.Haskell.GhcMod.Logger
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import Language.Haskell.GhcMod.Monad (IOish, GhcModT, withErrorHandler)
import Language.Haskell.GhcMod.Target (setTargetFiles)
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----------------------------------------------------------------
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-- | Checking syntax of a target file using GHC.
-- Warnings and errors are returned.
checkSyntax :: IOish m
=> [FilePath] -- ^ The target files.
-> GhcModT m String
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checkSyntax [] = return ""
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checkSyntax files = withErrorHandler sessionName $
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either id id <$> check files
where
sessionName = case files of
[file] -> file
_ -> "MultipleFiles"
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----------------------------------------------------------------
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-- | Checking syntax of a target file using GHC.
-- Warnings and errors are returned.
check :: IOish m
=> [FilePath] -- ^ The target files.
-> GhcModT m (Either String String)
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check fileNames = withLogger setAllWaringFlags $ setTargetFiles fileNames
----------------------------------------------------------------
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-- | Expanding Haskell Template.
expandTemplate :: IOish m
=> [FilePath] -- ^ The target files.
-> GhcModT m String
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expandTemplate [] = return ""
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expandTemplate files = withErrorHandler sessionName $
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either id id <$> expand files
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where
sessionName = case files of
[file] -> file
_ -> "MultipleFiles"
----------------------------------------------------------------
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-- | Expanding Haskell Template.
expand :: IOish m
=> [FilePath] -- ^ The target files.
-> GhcModT m (Either String String)
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expand fileNames = withLogger (Gap.setDumpSplices . setNoWaringFlags) $
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setTargetFiles fileNames