Added stream of fresh labels

[cc1516.git] / gen.icl

diff --git a/gen.icl b/gen.icl
index cd01d95..c8b45d3 100644 (file)
--- a/gen.icl
+++ b/gen.icl
@@ -6,11 +6,13 @@ import StdList
 import StdOverloaded
 import StdString
 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
@@ -23,13 +25,14 @@ 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"]
 
@@ -44,10 +47,10 @@ gen _ = toString    [Label "Test"
 :: GenMap :== 'Map'.Map String LoadPlace
 :: LoadPlace    = LDA Int | LDC Int | LDH Int | LDL Int 
                 | LDR Int | LDS Int
-:: Gen a :== StateT (GenMap) (Either GenError) a
+:: Gen a :== StateT (GenMap, [Label]) (Either GenError) a
 
 genMap :: Gen GenMap
-genMap = gets id
+genMap = gets fst
 
 class g a :: a -> Gen SSMProgram
 
@@ -57,22 +60,23 @@ instance g Expr where
 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 = pure (loadP $ 'Map'.find k g)
+    True = loadP $ 'Map'.find k g
 
-loadP :: LoadPlace -> Instr
-loadP pl = let (instr, arg) = dec pl in Instr instr [Lit arg] ""
+loadP :: LoadPlace -> Gen Instr
+loadP pl = dec pl >>= \(instr, arg)-> pure $ Instr instr [arg] ""
 where
-    dec (LDA i) = ("lda", i)
-    dec (LDC i) = ("ldc", i)
-    dec (LDH i) = ("ldh", i)
-    dec (LDL i) = ("ldl", i)
-    dec (LDR i) = ("ldr", i)
-    dec (LDS i) = ("lds", i)
+    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
@@ -85,5 +89,5 @@ instance toString Arg where
 instance toString SSMProgram where
     toString p = concat $ intersperse " " $ map (\i-> concat $ intersperse " " $ print i) p
 
-instance MonadTrans (StateT GenMap) where
+instance MonadTrans (StateT (GenMap,[Label])) where
     liftT m = StateT \s-> m >>= \a-> return (a, s)
\ No newline at end of file