72 lines
2.5 KiB
Haskell
72 lines
2.5 KiB
Haskell
-- ghc-mod: Making Haskell development *more* fun
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-- Copyright (C) 2015,2016 Daniel Gröber <dxld ÄT darkboxed DOT org>
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--
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-- This program is free software: you can redistribute it and/or modify
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-- it under the terms of the GNU Affero General Public License as published by
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-- the Free Software Foundation, either version 3 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU Affero General Public License for more details.
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--
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-- You should have received a copy of the GNU Affero General Public License
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-- along with this program. If not, see <http://www.gnu.org/licenses/>.
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{-# LANGUAGE GeneralizedNewtypeDeriving, StandaloneDeriving #-}
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{-# LANGUAGE FlexibleInstances, UndecidableInstances #-}
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module Language.Haskell.GhcMod.Monad.Log where
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import Language.Haskell.GhcMod.Types
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import Language.Haskell.GhcMod.Monad.Newtypes
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import Control.Monad
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import Control.Monad.Trans.Journal (JournalT)
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import Control.Monad.Reader (ReaderT(..))
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import Control.Monad.State.Strict (StateT(..))
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import Control.Monad.Error (Error, ErrorT(..))
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import Control.Monad.Trans.Maybe (MaybeT(..))
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import Control.Monad.Journal.Class (MonadJournal(..))
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import Control.Monad.Trans.Class (MonadTrans(..))
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import Prelude
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class Monad m => GmLog m where
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gmlJournal :: GhcModLog -> m ()
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gmlHistory :: m GhcModLog
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gmlClear :: m ()
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instance Monad m => GmLog (JournalT GhcModLog m) where
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gmlJournal = journal
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gmlHistory = history
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gmlClear = clear
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instance Monad m => GmLog (GmT m) where
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gmlJournal = GmT . lift . lift . journal
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gmlHistory = GmT $ lift $ lift history
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gmlClear = GmT $ lift $ lift clear
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instance (Monad m, GmLog m) => GmLog (ReaderT r m) where
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gmlJournal = lift . gmlJournal
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gmlHistory = lift gmlHistory
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gmlClear = lift gmlClear
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instance (Monad m, GmLog m) => GmLog (StateT s m) where
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gmlJournal = lift . gmlJournal
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gmlHistory = lift gmlHistory
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gmlClear = lift gmlClear
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instance (Monad m, GmLog m, Error e) => GmLog (ErrorT e m) where
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gmlJournal = lift . gmlJournal
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gmlHistory = lift gmlHistory
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gmlClear = lift gmlClear
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instance (Monad m, GmLog m) => GmLog (MaybeT m) where
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gmlJournal = lift . gmlJournal
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gmlHistory = lift gmlHistory
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gmlClear = lift gmlClear
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deriving instance GmLog m => GmLog (GmOutT m)
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deriving instance (Monad m, GmLog (GhcModT m)) => GmLog (GmlT m)
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