{-# LANGUAGE CPP #-}
{-# OPTIONS_GHC -fno-warn-orphans #-}
module Agda.TypeChecking.Reduce.Monad
( constructorForm
, enterClosure
, underAbstraction , underAbstraction_
, addCtxTel
, getConstInfo
, isInstantiatedMeta
, lookupMeta
, askR, applyWhenVerboseS
) where
import Prelude hiding (null)
import Control.Arrow ((***), first, second)
import Control.Applicative hiding (empty)
import Control.Monad.Reader
import qualified Data.Map as Map
import Data.Maybe
import Data.Monoid
import Debug.Trace
import System.IO.Unsafe
import Agda.Syntax.Common
import Agda.Syntax.Position
import Agda.Syntax.Internal
import Agda.TypeChecking.Monad hiding
( enterClosure, underAbstraction_, underAbstraction, addCtx,
isInstantiatedMeta, verboseS, typeOfConst, lookupMeta )
import Agda.TypeChecking.Monad.Builtin hiding ( constructorForm )
import Agda.TypeChecking.Substitute
import Agda.Interaction.Options
import qualified Agda.Utils.HashMap as HMap
import Agda.Utils.Lens
import Agda.Utils.Monad
import Agda.Utils.Null
import Agda.Utils.Pretty
#include "undefined.h"
import Agda.Utils.Impossible
instance HasBuiltins ReduceM where
getBuiltinThing b = liftM2 mplus (Map.lookup b <$> useR stLocalBuiltins)
(Map.lookup b <$> useR stImportedBuiltins)
constructorForm :: HasBuiltins m => Term -> m Term
constructorForm v = do
mz <- getBuiltin' builtinZero
ms <- getBuiltin' builtinSuc
return $ fromMaybe v $ constructorForm' mz ms v
enterClosure :: Closure a -> (a -> ReduceM b) -> ReduceM b
enterClosure (Closure sig env scope cps x) f = localR (mapRedEnvSt inEnv inState) (f x)
where
inEnv e = env
inState s =
set stScope scope $ set stModuleCheckpoints cps s
withFreshR :: (ReadTCState m, HasFresh i) => (i -> m a) -> m a
withFreshR f = do
s <- getTCState
let (i, s') = nextFresh s
withTCState (const s') (f i)
withFreshName :: (MonadReduce m) => Range -> ArgName -> (Name -> m a) -> m a
withFreshName r s k = withFreshR $ \i -> k (mkName r i s)
withFreshName_ :: (MonadReduce m) => ArgName -> (Name -> m a) -> m a
withFreshName_ = withFreshName noRange
addCtx :: (MonadReduce m) => Name -> Dom Type -> m a -> m a
addCtx x a ret = do
ctx <- asksTC $ map (fst . unDom) . envContext
let ce = (x,) <$> a
oldChkpt <- viewTC eCurrentCheckpoint
withFreshR $ \ chkpt ->
localTC (\e -> e { envContext = ce : envContext e
, envCurrentCheckpoint = chkpt
, envCheckpoints = Map.insert chkpt IdS $
fmap (raise 1) (envCheckpoints e)
}) ret
addCtxTel :: (MonadReduce m) => Telescope -> m a -> m a
addCtxTel EmptyTel ret = ret
addCtxTel (ExtendTel t tel) ret = underAbstraction t tel $ \tel -> addCtxTel tel ret
underAbstraction :: (MonadReduce m, Subst t a) => Dom Type -> Abs a -> (a -> m b) -> m b
underAbstraction _ (NoAbs _ v) f = f v
underAbstraction t a f =
withFreshName_ (realName $ absName a) $ \x -> addCtx x t $ f (absBody a)
where
realName s = if isNoName s then "x" else s
underAbstraction_ :: (MonadReduce m, Subst t a) => Abs a -> (a -> m b) -> m b
underAbstraction_ = underAbstraction __DUMMY_DOM__
lookupMeta :: MetaId -> ReduceM MetaVariable
lookupMeta i = fromMaybe __IMPOSSIBLE__ . Map.lookup i <$> useR stMetaStore
isInstantiatedMeta :: MetaId -> ReduceM Bool
isInstantiatedMeta i = do
mv <- lookupMeta i
return $ case mvInstantiation mv of
InstV{} -> True
_ -> False
{-# SPECIALIZE applyWhenVerboseS :: VerboseKey -> Int -> (ReduceM a -> ReduceM a) -> ReduceM a-> ReduceM a #-}
applyWhenVerboseS :: HasOptions m => VerboseKey -> Int -> (m a -> m a) -> m a -> m a
applyWhenVerboseS k n f a = ifM (hasVerbosity k n) (f a) a
instance MonadDebug ReduceM where
traceDebugMessage n s cont = do
ReduceEnv env st <- askR
unsafePerformIO $ do
_ <- runTCM env st $ displayDebugMessage n s
return $ cont
formatDebugMessage k n d = do
ReduceEnv env st <- askR
unsafePerformIO $ do
(s , _) <- runTCM env st $ formatDebugMessage k n d
return $ return s
instance HasConstInfo ReduceM where
getRewriteRulesFor = defaultGetRewriteRulesFor getTCState
getConstInfo' q = do
ReduceEnv env st <- askR
defaultGetConstInfo st env q