import StdList
import StdOverloaded
import StdString
-
-from Data.Func import $
-from Text import class Text(join), instance Text String
-from Data.List import intersperse
+from StdFunc import id
+import StdTuple
+
+import Data.Func
+import qualified Data.Map as Map
+import Data.List
+import Data.Either
+import Data.Tuple
+import Data.Functor
+import Control.Applicative
+import Control.Monad
+import Control.Monad.State
+import Control.Monad.Trans
+from Text import class Text(concat), instance Text String
import AST
//Instruction is an instruction, with possible arguments and a possible comment
//Or is a label
:: Instr = Instr String [Arg] String
- | Label String
-:: Arg = L String | Lit Int
+ | Lab String
+:: Label :== String
+:: Arg = L Label | Lit Int
:: SSMProgram :== [Instr]
gen :: AST -> String
-gen _ = toString [Label "Test"
+gen _ = toString [Lab "Test"
,Instr "ldc" [Lit 1] "Eerste instructie"
,Instr "ldc" [Lit 2] "Tweede instructie"]
//i.e. to figure out the positions of vars relative to the
//SP/MP/whatever or in which register they are
//and to supply with fresh labels
-class g a :: a -> SSMProgram
-instance g Expr where
- g _ = undef
+//The generation monad
+:: GenError = Error String
+:: GenMap :== 'Map'.Map String LoadPlace
+:: LoadPlace = LDA Int | LDC Int | LDH Int | LDL Int
+ | LDR Int | LDS Int
+:: Gen a :== StateT (GenMap, [Label]) (Either GenError) a
+genMap :: Gen GenMap
+genMap = gets fst
+class g a :: a -> Gen SSMProgram
+
+instance g Expr where
+ g (VarExpr _ (VarDef k fs)) = pure <$> load k //note: pure is pure for list, i.e. []
+
+load :: String -> Gen Instr
+load k = genMap >>= \g-> case 'Map'.member k g of
+ False = liftT (Left $ Error $ concat ["PANIC: ", k, " not found in variable mapping"])
+ True = loadP $ 'Map'.find k g
+
+loadP :: LoadPlace -> Gen Instr
+loadP pl = dec pl >>= \(instr, arg)-> pure $ Instr instr [arg] ""
+where
+ dec (LDA i) = pure ("lda", Lit i)
+ dec (LDC i) = pure ("ldc", Lit i)
+ dec (LDH i) = pure ("ldh", Lit i)
+ dec (LDL i) = pure ("ldl", Lit i)
+ dec (LDR i) = pure ("ldr", Lit i)
+ dec (LDS i) = pure ("lds", Lit i)
+ dec _ = liftT (Left $ Error "PANIC: trying to load non adres")
class print a :: a -> [String]
instance print Instr where
- print (Label l) = [l, ":", "\n"]
+ print (Lab l) = [l, ":", "\n"]
print (Instr i args com) = ["\t", i] ++ print args ++ [" ;", com, "\n"]
instance print [Arg] where
toString (Lit int) = toString int
instance toString SSMProgram where
- toString p = join " " $ map (\i-> join " " $ print i) p
\ No newline at end of file
+ toString p = concat $ intersperse " " $ map (\i-> concat $ intersperse " " $ print i) p
+
+instance MonadTrans (StateT (GenMap,[Label])) where
+ liftT m = StateT \s-> m >>= \a-> return (a, s)
\ No newline at end of file