Redo the global (state) structure of the translator.

[matthijs/master-project/cλash.git] / TranslatorTypes.hs

diff --git a/TranslatorTypes.hs b/TranslatorTypes.hs
index d50881600a11b9ec83d8a6ec7b83baa609bc0139..37e86190a63f36b1b38acf1c75b193cda7fbdb44 100644 (file)
--- a/TranslatorTypes.hs
+++ b/TranslatorTypes.hs
@@ -2,10 +2,13 @@
 -- Simple module providing some types used by Translator. These are in a
 -- separate module to prevent circular dependencies in Pretty for example.
 --
+{-# LANGUAGE TemplateHaskell #-}
 module TranslatorTypes where
 
-import qualified Control.Monad.State as State
+import qualified Control.Monad.Trans.State as State
 import qualified Data.Map as Map
+import qualified Data.Accessor.Template
+import Data.Accessor
 
 import qualified HscTypes
 
@@ -18,98 +21,17 @@ import HsValueMap
 
 -- | A map from a HsFunction identifier to various stuff we collect about a
 --   function along the way.
-type FuncMap  = Map.Map HsFunction FuncData
+type FlatFuncMap  = Map.Map HsFunction FlatFunction
 
--- | Some stuff we collect about a function along the way.
-data FuncData = FuncData {
-  flatFunc     :: Maybe FlatFunction,
-  funcEntity   :: Maybe Entity,
-  funcArch     :: Maybe AST.ArchBody
-} deriving (Show)
-
-data VHDLSession = VHDLSession {
-  coreMod   :: HscTypes.CoreModule, -- The current module
-  nameCount :: Int,             -- A counter that can be used to generate unique names
-  funcs     :: FuncMap          -- A map from HsFunction to FlatFunction, HWFunction, VHDL Entity and Architecture
+data TranslatorSession = TranslatorSession {
+  tsCoreModule_ :: HscTypes.CoreModule, -- ^ The current module
+  tsNameCount_ :: Int, -- ^ A counter that can be used to generate unique names
+  tsFlatFuncs_ :: FlatFuncMap -- ^ A map from HsFunction to FlatFunction
 }
 
--- | Add the function to the session
-addFunc :: HsFunction -> VHDLState ()
-addFunc hsfunc =
-  modFuncMap (Map.insert hsfunc (FuncData Nothing Nothing Nothing))
-
--- | Find the given function in the current session
-getFunc :: HsFunction -> VHDLState (Maybe FuncData)
-getFunc hsfunc = do
-  fs <- State.gets funcs -- Get the funcs element from the session
-  return $ Map.lookup hsfunc fs
-
--- | Gets all functions from the current session
-getFuncs :: VHDLState [(HsFunction, FuncData)]
-getFuncs = do
-  fs <- State.gets funcs -- Get the funcs element from the session
-  return $ Map.toList fs
-
--- | Gets all the functions from the current session
-getHsFuncs :: VHDLState [HsFunction]
-getHsFuncs = do
-  fs <- State.gets funcs -- Get the funcs element from the session
-  return $ Map.keys fs
-  
--- | Sets the FlatFunction for the given HsFunction in the current session.
-setFlatFunc :: HsFunction -> FlatFunction -> VHDLState ()
-setFlatFunc hsfunc flatfunc =
-  modFunc (\d -> d { flatFunc = Just flatfunc }) hsfunc
-
--- | Sets the Entity for the given HsFunction in the current session.
-setEntity :: HsFunction -> Entity -> VHDLState ()
-setEntity hsfunc entity =
-  modFunc (\d -> d { funcEntity = Just entity }) hsfunc
-
--- | Sets the Entity for the given HsFunction in the current session.
-setArchitecture :: HsFunction -> AST.ArchBody -> VHDLState ()
-setArchitecture hsfunc arch =
-  modFunc (\d -> d { funcArch = Just arch }) hsfunc
-
--- | Modify a function in the map using the given function
-modFunc :: (FuncData -> FuncData) -> HsFunction -> VHDLState ()
-modFunc f hsfunc =
-  modFuncMap (Map.adjust f hsfunc)
-
--- | Modify the function map in the session using the given function
-modFuncMap :: (FuncMap -> FuncMap) -> VHDLState ()
-modFuncMap f = do
-  fs <- State.gets funcs -- Get the funcs element from the session
-  let fs' = f fs
-  State.modify (\x -> x {funcs = fs' })
-
--- | Apply the given function to all functions in the map, and collect the
---   results. The function is allowed to change the function map in the
---   session, but any new functions added will not be mapped.
-modFuncs :: (HsFunction -> FuncData -> VHDLState ()) -> VHDLState ()
-modFuncs f = do
-  hsfuncs <- getHsFuncs
-  mapM doFunc hsfuncs
-  return ()
-  where
-    doFunc hsfunc = do
-      fdata_maybe <- getFunc hsfunc
-      case fdata_maybe of
-        Nothing -> do return ()
-        Just fdata -> f hsfunc fdata
-
-getModule :: VHDLState HscTypes.CoreModule
-getModule = State.gets coreMod -- Get the coreMod element from the session
-
-type VHDLState = State.State VHDLSession
+-- Derive accessors
+$( Data.Accessor.Template.deriveAccessors ''TranslatorSession )
 
--- Makes the given name unique by appending a unique number.
--- This does not do any checking against existing names, so it only guarantees
--- uniqueness with other names generated by uniqueName.
-uniqueName :: String -> VHDLState String
-uniqueName name = do
-  count <- State.gets nameCount -- Get the funcs element from the session
-  State.modify (\s -> s {nameCount = count + 1})
-  return $ name ++ "_" ++ (show count)
+type TranslatorState = State.State TranslatorSession
 
 -- vim: set ts=8 sw=2 sts=2 expandtab: