-- Copyright © 2011 National Institute of Aerospace / Galois, Inc.

-- | Transform a Copilot Language specification into a Copilot Core
-- specification.

{-# LANGUAGE ExistentialQuantification #-}
{-# LANGUAGE GADTs                     #-}
{-# LANGUAGE Rank2Types                #-}
{-# LANGUAGE Safe                      #-}

module Copilot.Language.Reify
  ( reify
  ) where

import qualified Copilot.Core as Core
import Copilot.Core (Typed, Id, typeOf)

import Copilot.Language.Analyze (analyze)
import Copilot.Language.Error   (impossible)
import Copilot.Language.Spec
import Copilot.Language.Stream (Stream (..))

import Copilot.Theorem.Prove

import Prelude hiding (id)
import Data.IORef
import System.Mem.StableName.Dynamic
import System.Mem.StableName.Map (Map)
import qualified System.Mem.StableName.Map as M
import Control.Monad (liftM, unless)

-- | Transform a Copilot Language specification into a Copilot Core
-- specification.
reify :: Spec' a -> IO Core.Spec
reify :: forall a. Spec' a -> IO Spec
reify Spec' a
spec = do
  Spec' a -> IO ()
forall a. Spec' a -> IO ()
analyze Spec' a
spec
  let trigs :: [Trigger]
trigs = [SpecItem] -> [Trigger]
triggers   ([SpecItem] -> [Trigger]) -> [SpecItem] -> [Trigger]
forall a b. (a -> b) -> a -> b
$ Spec' a -> [SpecItem]
forall a. Spec' a -> [SpecItem]
runSpec Spec' a
spec
  let obsvs :: [Observer]
obsvs = [SpecItem] -> [Observer]
observers  ([SpecItem] -> [Observer]) -> [SpecItem] -> [Observer]
forall a b. (a -> b) -> a -> b
$ Spec' a -> [SpecItem]
forall a. Spec' a -> [SpecItem]
runSpec Spec' a
spec
  let props :: [Property]
props = [SpecItem] -> [Property]
properties ([SpecItem] -> [Property]) -> [SpecItem] -> [Property]
forall a b. (a -> b) -> a -> b
$ Spec' a -> [SpecItem]
forall a. Spec' a -> [SpecItem]
runSpec Spec' a
spec
  let thms :: [(Property, UProof)]
thms  = [(Property, UProof)] -> [(Property, UProof)]
forall a. [a] -> [a]
reverse ([(Property, UProof)] -> [(Property, UProof)])
-> [(Property, UProof)] -> [(Property, UProof)]
forall a b. (a -> b) -> a -> b
$ [SpecItem] -> [(Property, UProof)]
theorems ([SpecItem] -> [(Property, UProof)])
-> [SpecItem] -> [(Property, UProof)]
forall a b. (a -> b) -> a -> b
$ Spec' a -> [SpecItem]
forall a. Spec' a -> [SpecItem]
runSpec Spec' a
spec
  IORef Int
refMkId         <- Int -> IO (IORef Int)
forall a. a -> IO (IORef a)
newIORef Int
0
  IORef (Map Int)
refVisited      <- Map Int -> IO (IORef (Map Int))
forall a. a -> IO (IORef a)
newIORef Map Int
forall a. Map a
M.empty
  IORef [Stream]
refMap          <- [Stream] -> IO (IORef [Stream])
forall a. a -> IO (IORef a)
newIORef []
  [Trigger]
coreTriggers    <- (Trigger -> IO Trigger) -> [Trigger] -> IO [Trigger]
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
forall (m :: * -> *) a b. Monad m => (a -> m b) -> [a] -> m [b]
mapM (IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Trigger -> IO Trigger
mkTrigger  IORef Int
refMkId IORef (Map Int)
refVisited IORef [Stream]
refMap) [Trigger]
trigs
  [Observer]
coreObservers   <- (Observer -> IO Observer) -> [Observer] -> IO [Observer]
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
forall (m :: * -> *) a b. Monad m => (a -> m b) -> [a] -> m [b]
mapM (IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Observer -> IO Observer
mkObserver IORef Int
refMkId IORef (Map Int)
refVisited IORef [Stream]
refMap) [Observer]
obsvs
  [Property]
coreProperties  <- (Property -> IO Property) -> [Property] -> IO [Property]
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
forall (m :: * -> *) a b. Monad m => (a -> m b) -> [a] -> m [b]
mapM (IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Property -> IO Property
mkProperty IORef Int
refMkId IORef (Map Int)
refVisited IORef [Stream]
refMap) ([Property] -> IO [Property]) -> [Property] -> IO [Property]
forall a b. (a -> b) -> a -> b
$ [Property]
props [Property] -> [Property] -> [Property]
forall a. [a] -> [a] -> [a]
++ (((Property, UProof) -> Property)
-> [(Property, UProof)] -> [Property]
forall a b. (a -> b) -> [a] -> [b]
map (Property, UProof) -> Property
forall a b. (a, b) -> a
fst [(Property, UProof)]
thms)
  [Stream]
coreStreams     <- IORef [Stream] -> IO [Stream]
forall a. IORef a -> IO a
readIORef IORef [Stream]
refMap

  let cspec :: Spec
cspec = Core.Spec
        { specStreams :: [Stream]
Core.specStreams    = [Stream] -> [Stream]
forall a. [a] -> [a]
reverse [Stream]
coreStreams
        , specObservers :: [Observer]
Core.specObservers  = [Observer]
coreObservers
        , specTriggers :: [Trigger]
Core.specTriggers   = [Trigger]
coreTriggers
        , specProperties :: [Property]
Core.specProperties = [Property]
coreProperties }

  [Bool]
results <- [IO Bool] -> IO [Bool]
forall (t :: * -> *) (m :: * -> *) a.
(Traversable t, Monad m) =>
t (m a) -> m (t a)
forall (m :: * -> *) a. Monad m => [m a] -> m [a]
sequence ([IO Bool] -> IO [Bool]) -> [IO Bool] -> IO [Bool]
forall a b. (a -> b) -> a -> b
$ (PropId -> UProof -> IO Bool) -> [PropId] -> [UProof] -> [IO Bool]
forall a b c. (a -> b -> c) -> [a] -> [b] -> [c]
zipWith (Spec -> PropId -> UProof -> IO Bool
prove Spec
cspec) (((Property, UProof) -> PropId) -> [(Property, UProof)] -> [PropId]
forall a b. (a -> b) -> [a] -> [b]
map (\(Property PropId
n Prop a
_,UProof
_) -> PropId
n) [(Property, UProof)]
thms) ([UProof] -> [IO Bool]) -> [UProof] -> [IO Bool]
forall a b. (a -> b) -> a -> b
$ ((Property, UProof) -> UProof) -> [(Property, UProof)] -> [UProof]
forall a b. (a -> b) -> [a] -> [b]
map (Property, UProof) -> UProof
forall a b. (a, b) -> b
snd [(Property, UProof)]
thms
  Bool -> IO () -> IO ()
forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
unless ([Bool] -> Bool
forall (t :: * -> *). Foldable t => t Bool -> Bool
and [Bool]
results) (IO () -> IO ()) -> IO () -> IO ()
forall a b. (a -> b) -> a -> b
$ PropId -> IO ()
putStrLn PropId
"Warning: failed to check some proofs."

  Spec -> IO Spec
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Spec
cspec

-- | Transform a Copilot observer specification into a Copilot Core
-- observer specification.
{-# INLINE mkObserver #-}
mkObserver
  :: IORef Int
  -> IORef (Map Core.Id)
  -> IORef [Core.Stream]
  -> Observer
  -> IO Core.Observer
mkObserver :: IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Observer -> IO Observer
mkObserver IORef Int
refMkId IORef (Map Int)
refStreams IORef [Stream]
refMap (Observer PropId
name Stream a
e) = do
  Expr a
w <- IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Stream a -> IO (Expr a)
forall a.
Typed a =>
IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Stream a -> IO (Expr a)
mkExpr IORef Int
refMkId IORef (Map Int)
refStreams IORef [Stream]
refMap Stream a
e
  Observer -> IO Observer
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Core.Observer
    { observerName :: PropId
Core.observerName     = PropId
name
    , observerExpr :: Expr a
Core.observerExpr     = Expr a
w
    , observerExprType :: Type a
Core.observerExprType = Type a
forall a. Typed a => Type a
typeOf }

-- | Transform a Copilot trigger specification into a Copilot Core
-- trigger specification.
{-# INLINE mkTrigger #-}
mkTrigger
  :: IORef Int
  -> IORef (Map Core.Id)
  -> IORef [Core.Stream]
  -> Trigger
  -> IO Core.Trigger
mkTrigger :: IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Trigger -> IO Trigger
mkTrigger IORef Int
refMkId IORef (Map Int)
refStreams IORef [Stream]
refMap (Trigger PropId
name Stream Bool
guard [Arg]
args) = do
  Expr Bool
w1 <- IORef Int
-> IORef (Map Int)
-> IORef [Stream]
-> Stream Bool
-> IO (Expr Bool)
forall a.
Typed a =>
IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Stream a -> IO (Expr a)
mkExpr IORef Int
refMkId IORef (Map Int)
refStreams IORef [Stream]
refMap Stream Bool
guard
  [UExpr]
args' <- (Arg -> IO UExpr) -> [Arg] -> IO [UExpr]
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
forall (m :: * -> *) a b. Monad m => (a -> m b) -> [a] -> m [b]
mapM Arg -> IO UExpr
mkTriggerArg [Arg]
args
  Trigger -> IO Trigger
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Core.Trigger
    { triggerName :: PropId
Core.triggerName  = PropId
name
    , triggerGuard :: Expr Bool
Core.triggerGuard = Expr Bool
w1
    , triggerArgs :: [UExpr]
Core.triggerArgs  = [UExpr]
args' }

  where

  mkTriggerArg :: Arg -> IO Core.UExpr
  mkTriggerArg :: Arg -> IO UExpr
mkTriggerArg (Arg Stream a
e) = do
    Expr a
w <- IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Stream a -> IO (Expr a)
forall a.
Typed a =>
IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Stream a -> IO (Expr a)
mkExpr IORef Int
refMkId IORef (Map Int)
refStreams IORef [Stream]
refMap Stream a
e
    UExpr -> IO UExpr
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (UExpr -> IO UExpr) -> UExpr -> IO UExpr
forall a b. (a -> b) -> a -> b
$ Type a -> Expr a -> UExpr
forall a. Typeable a => Type a -> Expr a -> UExpr
Core.UExpr Type a
forall a. Typed a => Type a
typeOf Expr a
w

-- | Transform a Copilot property specification into a Copilot Core
-- property specification.
{-# INLINE mkProperty #-}
mkProperty
  :: IORef Int
  -> IORef (Map Core.Id)
  -> IORef [Core.Stream]
  -> Property
  -> IO Core.Property
mkProperty :: IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Property -> IO Property
mkProperty IORef Int
refMkId IORef (Map Int)
refStreams IORef [Stream]
refMap (Property PropId
name Prop a
p) = do
  Prop
p' <- IORef Int -> IORef (Map Int) -> IORef [Stream] -> Prop a -> IO Prop
forall a.
IORef Int -> IORef (Map Int) -> IORef [Stream] -> Prop a -> IO Prop
mkProp IORef Int
refMkId IORef (Map Int)
refStreams IORef [Stream]
refMap Prop a
p
  Property -> IO Property
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Core.Property
    { propertyName :: PropId
Core.propertyName  = PropId
name
    , propertyProp :: Prop
Core.propertyProp  = Prop
p' }

-- | Transform a Copilot proposition into a Copilot Core proposition.
mkProp :: IORef Int
       -> IORef (Map Core.Id)
       -> IORef [Core.Stream]
       -> Prop a
       -> IO Core.Prop
mkProp :: forall a.
IORef Int -> IORef (Map Int) -> IORef [Stream] -> Prop a -> IO Prop
mkProp IORef Int
refMkId IORef (Map Int)
refStreams IORef [Stream]
refMap Prop a
prop =
  case Prop a
prop of
    Forall Stream Bool
e -> Expr Bool -> Prop
Core.Forall (Expr Bool -> Prop) -> IO (Expr Bool) -> IO Prop
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> IORef Int
-> IORef (Map Int)
-> IORef [Stream]
-> Stream Bool
-> IO (Expr Bool)
forall a.
Typed a =>
IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Stream a -> IO (Expr a)
mkExpr IORef Int
refMkId IORef (Map Int)
refStreams IORef [Stream]
refMap Stream Bool
e
    Exists Stream Bool
e -> Expr Bool -> Prop
Core.Exists (Expr Bool -> Prop) -> IO (Expr Bool) -> IO Prop
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> IORef Int
-> IORef (Map Int)
-> IORef [Stream]
-> Stream Bool
-> IO (Expr Bool)
forall a.
Typed a =>
IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Stream a -> IO (Expr a)
mkExpr IORef Int
refMkId IORef (Map Int)
refStreams IORef [Stream]
refMap Stream Bool
e

-- | Transform a Copilot stream expression into a Copilot Core expression.
{-# INLINE mkExpr #-}
mkExpr
  :: Typed a
  => IORef Int
  -> IORef (Map Core.Id)
  -> IORef [Core.Stream]
  -> Stream a
  -> IO (Core.Expr a)
mkExpr :: forall a.
Typed a =>
IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Stream a -> IO (Expr a)
mkExpr IORef Int
refMkId IORef (Map Int)
refStreams IORef [Stream]
refMap = Stream a -> IO (Expr a)
forall a. Typed a => Stream a -> IO (Expr a)
go

  where
  go :: Typed a => Stream a -> IO (Core.Expr a)
  go :: forall a. Typed a => Stream a -> IO (Expr a)
go Stream a
e0 = case Stream a
e0 of

    ------------------------------------------------------

    Append [a]
_ Maybe (Stream Bool)
_ Stream a
_ -> do
      Int
s <- IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Stream a -> IO Int
forall a.
Typed a =>
IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Stream a -> IO Int
mkStream IORef Int
refMkId IORef (Map Int)
refStreams IORef [Stream]
refMap Stream a
e0
      Expr a -> IO (Expr a)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (Expr a -> IO (Expr a)) -> Expr a -> IO (Expr a)
forall a b. (a -> b) -> a -> b
$ Type a -> DropIdx -> Int -> Expr a
forall a. Typeable a => Type a -> DropIdx -> Int -> Expr a
Core.Drop Type a
forall a. Typed a => Type a
typeOf DropIdx
0 Int
s

    ------------------------------------------------------

    Drop Int
k Stream a
e1 -> case Stream a
e1 of
      Append [a]
_ Maybe (Stream Bool)
_ Stream a
_ -> do
          Int
s <- IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Stream a -> IO Int
forall a.
Typed a =>
IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Stream a -> IO Int
mkStream IORef Int
refMkId IORef (Map Int)
refStreams IORef [Stream]
refMap Stream a
e1
          Expr a -> IO (Expr a)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (Expr a -> IO (Expr a)) -> Expr a -> IO (Expr a)
forall a b. (a -> b) -> a -> b
$ Type a -> DropIdx -> Int -> Expr a
forall a. Typeable a => Type a -> DropIdx -> Int -> Expr a
Core.Drop Type a
forall a. Typed a => Type a
typeOf (Int -> DropIdx
forall a b. (Integral a, Num b) => a -> b
fromIntegral Int
k) Int
s
      Stream a
_ -> PropId -> PropId -> IO (Expr a)
forall a. PropId -> PropId -> a
impossible PropId
"mkExpr" PropId
"copilot-language"

    ------------------------------------------------------

    Const a
x -> Expr a -> IO (Expr a)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (Expr a -> IO (Expr a)) -> Expr a -> IO (Expr a)
forall a b. (a -> b) -> a -> b
$ Type a -> a -> Expr a
forall a. Typeable a => Type a -> a -> Expr a
Core.Const Type a
forall a. Typed a => Type a
typeOf a
x

    ------------------------------------------------------

    Local Stream a1
e Stream a1 -> Stream a
f -> do
        Int
id <- IORef Int -> IO Int
mkId IORef Int
refMkId
        let cs :: PropId
cs = PropId
"local_" PropId -> PropId -> PropId
forall a. [a] -> [a] -> [a]
++ Int -> PropId
forall a. Show a => a -> PropId
show Int
id
        Expr a1
w1 <- Stream a1 -> IO (Expr a1)
forall a. Typed a => Stream a -> IO (Expr a)
go Stream a1
e
        Expr a
w2 <- Stream a -> IO (Expr a)
forall a. Typed a => Stream a -> IO (Expr a)
go (Stream a1 -> Stream a
f (PropId -> Stream a1
forall a. Typed a => PropId -> Stream a
Var PropId
cs))
        Expr a -> IO (Expr a)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (Expr a -> IO (Expr a)) -> Expr a -> IO (Expr a)
forall a b. (a -> b) -> a -> b
$ Type a1 -> Type a -> PropId -> Expr a1 -> Expr a -> Expr a
forall a1 a.
Typeable a1 =>
Type a1 -> Type a -> PropId -> Expr a1 -> Expr a -> Expr a
Core.Local Type a1
forall a. Typed a => Type a
typeOf Type a
forall a. Typed a => Type a
typeOf PropId
cs Expr a1
w1 Expr a
w2

    ------------------------------------------------------

    Label PropId
s Stream a
e -> do
        Expr a
w <- Stream a -> IO (Expr a)
forall a. Typed a => Stream a -> IO (Expr a)
go Stream a
e
        Expr a -> IO (Expr a)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (Expr a -> IO (Expr a)) -> Expr a -> IO (Expr a)
forall a b. (a -> b) -> a -> b
$ Type a -> PropId -> Expr a -> Expr a
forall a. Typeable a => Type a -> PropId -> Expr a -> Expr a
Core.Label Type a
forall a. Typed a => Type a
typeOf PropId
s Expr a
w

    ------------------------------------------------------

    Var PropId
cs -> Expr a -> IO (Expr a)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (Expr a -> IO (Expr a)) -> Expr a -> IO (Expr a)
forall a b. (a -> b) -> a -> b
$ Type a -> PropId -> Expr a
forall a. Typeable a => Type a -> PropId -> Expr a
Core.Var Type a
forall a. Typed a => Type a
typeOf PropId
cs

    ------------------------------------------------------

    Extern PropId
cs Maybe [a]
mXs -> Expr a -> IO (Expr a)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (Expr a -> IO (Expr a)) -> Expr a -> IO (Expr a)
forall a b. (a -> b) -> a -> b
$ Type a -> PropId -> Maybe [a] -> Expr a
forall a. Typeable a => Type a -> PropId -> Maybe [a] -> Expr a
Core.ExternVar Type a
forall a. Typed a => Type a
typeOf PropId
cs Maybe [a]
mXs

    ------------------------------------------------------

    Op1 Op1 a1 a
op Stream a1
e -> do
      Expr a1
w <- Stream a1 -> IO (Expr a1)
forall a. Typed a => Stream a -> IO (Expr a)
go Stream a1
e
      Expr a -> IO (Expr a)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (Expr a -> IO (Expr a)) -> Expr a -> IO (Expr a)
forall a b. (a -> b) -> a -> b
$ Op1 a1 a -> Expr a1 -> Expr a
forall a1 a. Typeable a1 => Op1 a1 a -> Expr a1 -> Expr a
Core.Op1 Op1 a1 a
op Expr a1
w

    ------------------------------------------------------

    Op2 Op2 a1 b a
op Stream a1
e1 Stream b
e2 -> do
      Expr a1
w1 <- Stream a1 -> IO (Expr a1)
forall a. Typed a => Stream a -> IO (Expr a)
go Stream a1
e1
      Expr b
w2 <- Stream b -> IO (Expr b)
forall a. Typed a => Stream a -> IO (Expr a)
go Stream b
e2
      Expr a -> IO (Expr a)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (Expr a -> IO (Expr a)) -> Expr a -> IO (Expr a)
forall a b. (a -> b) -> a -> b
$ Op2 a1 b a -> Expr a1 -> Expr b -> Expr a
forall a1 b a.
(Typeable a1, Typeable b) =>
Op2 a1 b a -> Expr a1 -> Expr b -> Expr a
Core.Op2 Op2 a1 b a
op Expr a1
w1 Expr b
w2

    ------------------------------------------------------

    Op3 Op3 a1 b c a
op Stream a1
e1 Stream b
e2 Stream c
e3 -> do
      Expr a1
w1 <- Stream a1 -> IO (Expr a1)
forall a. Typed a => Stream a -> IO (Expr a)
go Stream a1
e1
      Expr b
w2 <- Stream b -> IO (Expr b)
forall a. Typed a => Stream a -> IO (Expr a)
go Stream b
e2
      Expr c
w3 <- Stream c -> IO (Expr c)
forall a. Typed a => Stream a -> IO (Expr a)
go Stream c
e3
      Expr a -> IO (Expr a)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (Expr a -> IO (Expr a)) -> Expr a -> IO (Expr a)
forall a b. (a -> b) -> a -> b
$ Op3 a1 b c a -> Expr a1 -> Expr b -> Expr c -> Expr a
forall a1 b c a.
(Typeable a1, Typeable b, Typeable c) =>
Op3 a1 b c a -> Expr a1 -> Expr b -> Expr c -> Expr a
Core.Op3 Op3 a1 b c a
op Expr a1
w1 Expr b
w2 Expr c
w3

    ------------------------------------------------------

  mkFunArg :: Arg -> IO Core.UExpr
  mkFunArg :: Arg -> IO UExpr
mkFunArg (Arg Stream a
e) = do
    Expr a
w <- IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Stream a -> IO (Expr a)
forall a.
Typed a =>
IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Stream a -> IO (Expr a)
mkExpr IORef Int
refMkId IORef (Map Int)
refStreams IORef [Stream]
refMap Stream a
e
    UExpr -> IO UExpr
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (UExpr -> IO UExpr) -> UExpr -> IO UExpr
forall a b. (a -> b) -> a -> b
$ Type a -> Expr a -> UExpr
forall a. Typeable a => Type a -> Expr a -> UExpr
Core.UExpr Type a
forall a. Typed a => Type a
typeOf Expr a
w

  mkStrArg :: (Core.Name, Arg) -> IO (Core.Name, Core.UExpr)
  mkStrArg :: (PropId, Arg) -> IO (PropId, UExpr)
mkStrArg (PropId
name, Arg Stream a
e) = do
    Expr a
w <- IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Stream a -> IO (Expr a)
forall a.
Typed a =>
IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Stream a -> IO (Expr a)
mkExpr IORef Int
refMkId IORef (Map Int)
refStreams IORef [Stream]
refMap Stream a
e
    (PropId, UExpr) -> IO (PropId, UExpr)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return ((PropId, UExpr) -> IO (PropId, UExpr))
-> (PropId, UExpr) -> IO (PropId, UExpr)
forall a b. (a -> b) -> a -> b
$ (PropId
name, Type a -> Expr a -> UExpr
forall a. Typeable a => Type a -> Expr a -> UExpr
Core.UExpr Type a
forall a. Typed a => Type a
typeOf Expr a
w)

-- | Transform a Copilot stream expression into a Copilot Core stream
-- expression.
{-# INLINE mkStream #-}
mkStream
  :: Typed a
  => IORef Int
  -> IORef (Map Core.Id)
  -> IORef [Core.Stream]
  -> Stream a
  -> IO Id
mkStream :: forall a.
Typed a =>
IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Stream a -> IO Int
mkStream IORef Int
refMkId IORef (Map Int)
refStreams IORef [Stream]
refMap Stream a
e0 = do
  DynStableName
dstn <- Stream a -> IO DynStableName
forall a. a -> IO DynStableName
makeDynStableName Stream a
e0
  let Append [a]
buf Maybe (Stream Bool)
_ Stream a
e = Stream a
e0 -- avoids warning
  Maybe Int
mk <- DynStableName -> IO (Maybe Int)
haveVisited DynStableName
dstn
  case Maybe Int
mk of
    Just Int
id_ -> Int -> IO Int
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Int
id_
    Maybe Int
Nothing  -> DynStableName -> [a] -> Stream a -> IO Int
forall a. Typed a => DynStableName -> [a] -> Stream a -> IO Int
addToVisited DynStableName
dstn [a]
buf Stream a
e

  where

  {-# INLINE haveVisited #-}
  haveVisited :: DynStableName -> IO (Maybe Int)
  haveVisited :: DynStableName -> IO (Maybe Int)
haveVisited DynStableName
dstn = do
    Map Int
tab <- IORef (Map Int) -> IO (Map Int)
forall a. IORef a -> IO a
readIORef IORef (Map Int)
refStreams
    Maybe Int -> IO (Maybe Int)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (DynStableName -> Map Int -> Maybe Int
forall v. DynStableName -> Map v -> Maybe v
M.lookup DynStableName
dstn Map Int
tab)

  {-# INLINE addToVisited #-}
  addToVisited
    :: Typed a
    => DynStableName
    -> [a]
    -> Stream a
    -> IO Id
  addToVisited :: forall a. Typed a => DynStableName -> [a] -> Stream a -> IO Int
addToVisited DynStableName
dstn [a]
buf Stream a
e = do
    Int
id <- IORef Int -> IO Int
mkId IORef Int
refMkId
    IORef (Map Int) -> (Map Int -> Map Int) -> IO ()
forall a. IORef a -> (a -> a) -> IO ()
modifyIORef IORef (Map Int)
refStreams (DynStableName -> Int -> Map Int -> Map Int
forall a. DynStableName -> a -> Map a -> Map a
M.insert DynStableName
dstn Int
id)
    Expr a
w <- IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Stream a -> IO (Expr a)
forall a.
Typed a =>
IORef Int
-> IORef (Map Int) -> IORef [Stream] -> Stream a -> IO (Expr a)
mkExpr IORef Int
refMkId IORef (Map Int)
refStreams IORef [Stream]
refMap Stream a
e
    IORef [Stream] -> ([Stream] -> [Stream]) -> IO ()
forall a. IORef a -> (a -> a) -> IO ()
modifyIORef IORef [Stream]
refMap (([Stream] -> [Stream]) -> IO ())
-> ([Stream] -> [Stream]) -> IO ()
forall a b. (a -> b) -> a -> b
$ (:)
      Core.Stream
        { streamId :: Int
Core.streamId         = Int
id
        , streamBuffer :: [a]
Core.streamBuffer     = [a]
buf
        , streamExpr :: Expr a
Core.streamExpr       = Expr a
w
        , streamExprType :: Type a
Core.streamExprType   = Type a
forall a. Typed a => Type a
typeOf }
    Int -> IO Int
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Int
id

-- | Create a fresh, unused 'Id'.
mkId :: IORef Int -> IO Id
mkId :: IORef Int -> IO Int
mkId IORef Int
refMkId = IORef Int -> (Int -> (Int, Int)) -> IO Int
forall a b. IORef a -> (a -> (a, b)) -> IO b
atomicModifyIORef IORef Int
refMkId ((Int -> (Int, Int)) -> IO Int) -> (Int -> (Int, Int)) -> IO Int
forall a b. (a -> b) -> a -> b
$ \ Int
n -> (Int -> Int
forall a. Enum a => a -> a
succ Int
n, Int
n)