X-Git-Url: https://git.martlubbers.net/?a=blobdiff_plain;f=sem.icl;h=2dc487f41606b2450365eaac10ae6cccae57f359;hb=cf5417094083fe82194940a157b6bdc74e40d844;hp=77131b097c587444963d86d5512d473816a08157;hpb=f490bc3083cc290680499d4c12be9b732b94fd82;p=cc1516.git

diff --git a/sem.icl b/sem.icl
index 77131b0..2dc487f 100644
--- a/sem.icl
+++ b/sem.icl
@@ -64,6 +64,8 @@ instance toString SemError where
 		toString p, 
 		"SemError: No ", toString o, " for type ",
 		toString t]
+    toString (UndeclaredVariableError p ident) = concat [
+        toString p, "SemError: identifier: ", ident, " undefined."]
 
 sem :: AST -> SemOutput
 sem (AST vd fd) = case runStateT m ('Map'.newMap, getRandomStream 1) of
@@ -71,20 +73,22 @@ sem (AST vd fd) = case runStateT m ('Map'.newMap, getRandomStream 1) of
     Right ((vds, fds), gamma) = Right ((AST vds fds), gamma)
 where 
     m :: Env ([VarDecl], [FunDecl])
-    m = (mapM semVarDecl vd) >>= \vds -> 
-        mapM semFunDecl fd >>= \fds -> 
+    m = mapM semFunDecl fd >>= \fds -> 
+        mapM semVarDecl vd >>= \vds -> 
         pure (vds, fds)
 
 semFunDecl :: FunDecl -> Env FunDecl
-semFunDecl f = pure f
+semFunDecl fd=:(FunDecl p f _ mt vds stmts) = case mt of 
+    Nothing = let t = IdType f in putIdent f t >>| pure fd
+    Just t = putIdent f t >>| pure fd
 
 semVarDecl :: VarDecl -> Env VarDecl
 semVarDecl (VarDecl pos type ident ex) = unify type ex
     >>= \t-> putIdent ident t >>| (pure $ VarDecl pos t ident ex)
 
-typeOp2 :: Expr Expr Op2 [Type] -> Env Type
-typeOp2 e1 e2 op ts = typeExpr e1 >>= \t1-> typeExpr e2 >>= \t2->
-	unify t1 t2	>>= \t3->if (isMember t3 ts) (pure t3)
+typeOp2 :: Expr Expr Op2 [Type] Type -> Env Type
+typeOp2 e1 e2 op ts ret = typeExpr e1 >>= \t1-> typeExpr e2 >>= \t2->
+	unify t1 t2	>>= \t3->if (isMember t3 ts) (pure ret)
 		(liftT $ Left $ OperatorError (extrPos e1) op t3)
 
 typeExpr :: Expr -> Env Type
@@ -97,23 +101,35 @@ typeExpr (TupleExpr p (e1, e2)) = typeExpr e1
     >>= \t1-> typeExpr e2 >>= \t2-> pure $ TupleType (t1, t2)
 typeExpr (Op2Expr p e1 op e2)
 | isMember op [BiPlus, BiMinus, BiTimes, BiDivide, BiMod] =
-	typeOp2 e1 e2 op [IntType]
+	typeOp2 e1 e2 op [IntType] IntType
 | isMember op [BiEquals, BiUnEqual] =
-	typeOp2 e1 e2 op [IntType, BoolType, CharType]
+	typeOp2 e1 e2 op [IntType, BoolType, CharType] BoolType
 | isMember op [BiLesser, BiGreater, BiLesserEq, BiGreaterEq] =
-	typeOp2 e1 e2 op [IntType, CharType]
+	typeOp2 e1 e2 op [IntType, CharType] BoolType
 | isMember op [BiAnd, BiOr] =
-	typeOp2 e1 e2 op [BoolType]
+	typeOp2 e1 e2 op [BoolType] BoolType
 | op == BiCons = typeExpr e1 >>= \t1-> typeExpr e2 
 	>>= \t2-> unify (ListType t1) t2
 typeExpr (EmptyListExpr p) = freshIdent >>= \frsh-> let t = IdType frsh in
     putIdent frsh t >>| pure t
-typeExpr (FunExpr p (FunCall fid args)) = undef
-//ignore field selectors
+typeExpr (FunExpr p (FunCall f es)) = gets (\(st, r)->'Map'.get f st)
+    >>= \mt-> case mt of
+        Nothing = freshIdent >>= \frsh-> buildFunctionType frsh es 
+            >>= \ft-> putIdent f ft >>| (pure $ IdType frsh)
+        Just t = unifyApp t es
 typeExpr (VarExpr p (VarDef ident fs)) = gets (\(st, r)->'Map'.get ident st)
-        >>= \mt->case mt of
-            Nothing = let t = IdType ident in putIdent ident t >>| pure t
-            Just t = unify t fs
+    >>= \mt->case mt of
+        Nothing = liftT $ Left $ UndeclaredVariableError p ident
+        Just t = unify t fs
+
+buildFunctionType :: String [Expr] -> Env Type 
+buildFunctionType frsh [] = let t = IdType frsh in putIdent frsh t >>| pure t
+buildFunctionType frsh [e:es] = (->>) <$> typeExpr e <*> buildFunctionType frsh es
+
+unifyApp :: Type [Expr] -> Env Type
+unifyApp t [] = pure t //whoop whoop, functions can return functions
+unifyApp (tf1 ->> tf2) [t1:ts] = unify tf1 t1 >>| unifyApp tf2 ts
+unifyApp t1 t2 = liftT $ Left $ UnifyError zero t1 (IdType "[expressions, FIXME]")
 
 class unify a :: Type a -> Env Type
 
@@ -164,6 +180,8 @@ instance unify Type where
     unify t (IdType i) = unify (IdType i) t
     unify (IdType i) t = replace i t >>| pure t
     unify (ListType t1) (ListType t2) = unify t1 t2 >>| (pure $ ListType t1)
+    unify (ta1 ->> ta2) (tb1 ->> tb2) = unify ta1 tb1 >>= \ta-> unify ta2 tb2 
+        >>= \tb-> pure (ta ->> tb)
 	unify t1 t2 = liftT $ Left $ UnifyError zero t1 t2
 
 instance zero Pos where