u

[cc1516.git] / gen.icl

diff --git a/gen.icl b/gen.icl
index 9145ee5..a37fedf 100644 (file)
--- a/gen.icl
+++ b/gen.icl
@@ -1,14 +1,12 @@
 implementation module gen
 
-
 import StdMisc
 import StdList
 import StdOverloaded
 import StdString
-from StdFunc import id
+from StdFunc import id, const
 import StdTuple
 import StdEnum
-from StdEnv import const
 
 import Data.Func
 import qualified Data.Map as Map
@@ -26,8 +24,6 @@ from Text import class Text(concat), instance Text String
 import AST
 import RWST
 
-//Instruction is an instruction, with possible arguments and a possible comment
-//Or is a label
 TRUE :== -1
 FALSE :== 0
 :: Instr    = Instr String [Arg] String
@@ -44,32 +40,28 @@ FALSE :== 0
 :: Gen a :== RWST Label SSMProgram (GenMap, [Label]) (Either GenError) a
 
 labelStream :: [Label]
-labelStream = map (\i-> concat ["lbl_", toString i]) [1..]
+labelStream = ["lbl_" +++ toString i\\i<-[1..]]
 
-gen :: AST -> String
+gen :: AST -> Either String String
 gen (AST fds) = case evalRWST prog "" ('Map'.newMap, labelStream) of
-            Left (Error e) = e
-            Right (_, p) = toString p
+            Left (Error e) = Left e
+            Right (_, p) = Right $ toString p
     where
         prog = tell [Instr "bra" [L "main"] ""] >>| mapM_ g fds
-//gen _ = prog
-//    where
-//        expr = (Op2Expr zero (Op1Expr zero UnMinus (IntExpr zero 4)) BiPlus (IntExpr zero 7))
-//        expr2 = (FunExpr zero "test" [IntExpr zero 4] [])
-//        stmt = (IfStmt (BoolExpr zero True) [] [])
-//        prog = case evalRWST (g stmt) 0 ('Map'.newMap, labelStream) of
-//            Left (Error e) = abort e
-//            Right (_, prog) = toString prog
-//gen _ = toString    [Lab "Test"
-//                    ,Instr "ldc" [Lit 1] "Eerste instructie"
-//                    ,Instr "ldc" [Lit 2] "Tweede instructie"]
-
-//TODO:
-//For now in the generation we assume all vars fit on the stack...
+
+//Current issues:
+//All VarDecls are added as function, how to deal with assignments?
+//  (And when we deal with assignments, how to deal with assignments to higher order functions?)
+//Dealing with arguments
+//Dealing with types that do not fit on the Stack
+//  Probably completely change LoadPlace to a Type and a position relative to *something*
+//  And where the type determines if this position is a pointer to the heap or an
+//  unboxed value
 
 //helper functions for the gen monad
 genMap :: Gen GenMap
 genMap = gets fst
+
 changeGenMap :: (GenMap -> GenMap) -> Gen GenMap
 changeGenMap f = modify (appFst f) >>| genMap
 
@@ -212,4 +204,4 @@ instance toString Arg where
     toString (Raw s) = s
 
 instance toString SSMProgram where
-    toString p = concat $ intersperse " " $ map (\i-> concat $ intersperse " " $ print i) p
\ No newline at end of file
+    toString p = concat $ intersperse " " $ map (\i-> concat $ intersperse " " $ print i) p