Added generationf or expressions, how to deal with lists and tuples?

[cc1516.git] / gen.icl

diff --git a/gen.icl b/gen.icl
index 71fe103..d0ec628 100644 (file)
--- a/gen.icl
+++ b/gen.icl
@@ -5,23 +5,37 @@ import StdMisc
 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 Data.Monoid
+import Control.Applicative
+import Control.Monad
+import Control.Monad.Trans
+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
-            | 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"]
 
@@ -30,17 +44,79 @@ gen _ = toString    [Label "Test"
 //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
+                | FUNC Label
+:: Gen a :== RWST [Int] SSMProgram (GenMap, [Label]) (Either GenError) a
 
+genMap :: Gen GenMap
+genMap = gets fst
 
+class g a :: a -> Gen ()
+
+instance g Expr where
+    g (VarExpr _ (VarDef k fs)) = load k >>= \instr-> tell [instr] //note: pure is pure for list, i.e. []
+    g (IntExpr _ i) = loadP (LDC i) >>= \instr-> tell [instr]
+    g (CharExpr _ c) = undef //how to deal with strings?
+    g (BoolExpr _ True) = loadP (LDC TRUE) >>= \instr-> tell [instr]
+    g (BoolExpr _ False) = loadP (LDC FALSE) >>= \instr-> tell [instr]
+    g (Op2Expr _ e1 op e2) = g e1 >>| g e2 >>| tell [Instr (op2ins op) [] ""]
+    g (Op1Expr _ UnNegation e) = g e >>| tell [Instr "not" [] ""]
+    g (Op1Expr _ UnMinus e) = g e >>| tell [Instr "neg" [] ""]
+    g (EmptyListExpr _) = abort "Shit, empty list expr"
+    g (TupleExpr p (e1,e2)) = abort "How to deal with tuples?"
+    g (FunExpr _ k es fs) = mapM g es >>| jump "bra" k >>= \instr-> tell [instr]
+
+op2ins :: Op2 -> String
+op2ins op = case op of
+    BiPlus = "add"
+    BiMinus = "sub"
+    BiTimes = "mul"
+    BiDivide = "div" 
+    BiMod = "mod"
+    BiEquals = "eq"
+    BiLesser = "lt"
+    BiGreater = "gt"
+    BiLesserEq = "le"
+    BiGreaterEq = "ge"
+    BiUnEqual = "ne"
+    BiAnd = "and"
+    BiOr = "or"
+    BiCons = abort "Shit, Cons, how to deal with this?"
+
+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")
+
+//Instruction (String), key of function to jump to    
+jump :: String String -> Gen Instr
+jump instr k = genMap >>= \g-> case 'Map'.member k g of
+    False = liftT (Left $ Error $ concat ["PANIC: ", k, " not found as function"])
+    True = dec ('Map'.find k g) >>= \lbl-> pure $ Instr instr [lbl] k 
+where
+    dec (FUNC l) = pure (L l)
+    dec _ = liftT (Left $ Error "PANIC: trying to jump to non label")
 
 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
@@ -51,4 +127,4 @@ instance toString 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
\ No newline at end of file