X-Git-Url: https://git.martlubbers.net/?a=blobdiff_plain;f=sem.icl;h=7af3b20316a292d89e8e4205ff760d862808fd62;hb=79bfc0933c6ce1f97930053d7a1090e90dd618f1;hp=0335e74d763e3cf2575046282805c6d8da310791;hpb=99821671e939170b1a450940a5d34066122f45a5;p=cc1516.git

diff --git a/sem.icl b/sem.icl
index 0335e74..7af3b20 100644
--- a/sem.icl
+++ b/sem.icl
@@ -3,6 +3,7 @@ implementation module sem
 import qualified Data.Map as Map
 from Data.Func import $
 import Data.Maybe
+import Data.Void
 import Data.Either
 import Data.Functor
 import Control.Applicative
@@ -33,57 +34,6 @@ instance MonadTrans (StateT Gamma) where
 
 get = gets id
 
-getRandomStream :: Int -> [String]
-getRandomStream i = genIdents $ filter (isAlpha o toChar) (genRandInt i)
-	where
-		genIdents r = let (ic, r2) = splitAt 5 r in [toString ic: genIdents r2]
-
-freshIdent :: Env String
-freshIdent = get >>= \(st, [ident:rest])-> put (st, rest) 
-    >>| case 'Map'.get ident st of
-        Nothing = pure ident
-        _       = freshIdent
-
-putIdent :: String Type -> Env Void
-putIdent i t = gets (\(st, r)->'Map'.get i st) >>= \mt -> case mt of
-    Nothing = modify (\(st, r)->('Map'.put i t st, r))
-    Just t2 = unify t t2 >>= \t3-> modify (\(st, r)->('Map'.put i t3 st, r))
-
-replace :: String Type -> Env Void
-replace ident type = get >>= \(st, fr)->put ('Map'.fromList $ 
-        map (itupdate ident type) ('Map'.toList st), fr)
-    where
-        itupdate :: String Type (String, Type) -> (String, Type)
-        itupdate ident newtype ov=:(key, IdType type) = if (ident == type)
-            (key, newtype) ov
-        itupdate ident newtype (key, TupleType (t1, t2))
-        # (_, t1) = itupdate ident newtype (key, t1)
-        # (_, t2) = itupdate ident newtype (key, t2)
-        = (key, TupleType (t1, t2))
-        itupdate ident newtype (key, ListType t1)
-        # (_, t1) = itupdate ident newtype (key, t1)
-        = (key, ListType t1)
-        itupdate _ _ k = k
-
-instance toString SemError where
-	toString (ParseError p e) = concat [
-		toString p,"SemError: ParseError: ", e]
-	toString (Error e) = "SemError: " +++ e
-	toString (UnifyError p t1 t2) = concat [
-		toString p,
-		"SemError: Cannot unify types. Expected: ",
-		toString t1, ". Given: ", toString t2]
-    toString (FieldSelectorError p t fs) = concat [
-        toString p,
-        "SemError: Cannot select ", toString fs, " from type: ",
-        toString t]
-	toString (OperatorError p o t) = concat [
-		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
     Left e = Left [e]
@@ -95,14 +45,22 @@ where
         pure (vds, fds)
 
 semFunDecl :: FunDecl -> Env FunDecl
-semFunDecl fd=:(FunDecl p f args mt vds stmts) = (case mt of
-    Nothing = let t = IdType f in putIdent f t >>| pure t//typeFun f args
-    Just t = putIdent f t >>| pure t) >>= \ft ->
-    mapM_ semVarDecl vds >>| 
-    mapM_ (checkStmt $ resultType ft) stmts >>| pure fd 
-    //case mt of 
-//    Nothing = let t = IdType f in putIdent f t >>| pure fd
-//    Just t = putIdent f t >>| pure fd
+semFunDecl fd=:(FunDecl p f args mt vds stmts) = 
+    saveGamma >>= \gamma ->
+    (case mt of
+        Nothing = let t = IdType f in putIdent f t >>| pure t
+        Just t = putIdent f t >>| pure t) >>= \ft ->
+ 	matchFunctions args ft >>|
+    mapM semVarDecl vds >>= \newvds->
+    mapM_ (checkStmt $ resultType ft) stmts >>| 
+    restoreGamma gamma >>| 
+	pure (FunDecl p f args mt newvds stmts) 
+
+matchFunctions :: [String] Type -> Env Void
+matchFunctions [] (_ ->> _) = liftT $ Left $ Error "Niet genoeg argumentenerror"
+matchFunctions [] t = pure Void
+matchFunctions [x:xs] (t1 ->> t2) = 
+	modify (\(st, r)->('Map'.put x t1 st, r)) >>| matchFunctions xs t2
 
 semVarDecl :: VarDecl -> Env VarDecl
 semVarDecl (VarDecl pos type ident ex) = unify type ex
@@ -113,14 +71,14 @@ checkStmt t (IfStmt c st se) = unify BoolType c >>| mapM (checkStmt t) st
     >>= \st1-> mapM (checkStmt t) se >>= \se1-> pure (IfStmt c st1 se1)
 checkStmt t w=:(WhileStmt c et) = unify BoolType c >>| mapM (checkStmt t) et
     >>= \et1-> pure w
-checkStmt t (AssStmt (VarDef ident fs) e) = undef
+checkStmt t a=:(AssStmt (VarDef ident fs) e) = gets (\(st, r)->'Map'.get ident st)
+    >>= \mt->case mt of
+        Nothing = liftT $ Left $ UndeclaredVariableError zero ident
+        Just t = unify t fs >>= \t1 -> unify t1 e >>| pure a
 checkStmt t r=:(FunStmt (FunCall f es)) = typeFun f es >>| pure r
 checkStmt VoidType r=:(ReturnStmt Nothing) = pure r
 checkStmt t r=:(ReturnStmt (Just e)) = unify t e >>| pure r
 
-all :: [Bool] -> Bool
-all as = foldr (&&) True as
-
 typeExpr :: Expr -> Env Type
 typeExpr (IntExpr _ _) = pure IntType
 typeExpr (CharExpr _ _) = pure CharType
@@ -158,7 +116,7 @@ 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 t [] = pure t
 unifyApp (tf1 ->> tf2) [t1:ts] = unify tf1 t1 >>| unifyApp tf2 ts
 unifyApp t1 t2 = liftT $ Left $ UnifyError zero t1 (IdType "[expressions, FIXME]")
 
@@ -236,3 +194,59 @@ instance toString Gamma where
 	toString (mp, _) = concat
 		[concat [k, ": ", toString v, "\n"]\\(k, v) <- 'Map'.toList mp]
 
+getRandomStream :: Int -> [String]
+getRandomStream i = genIdents $ filter (isAlpha o toChar) (genRandInt i)
+    where
+        genIdents r = let (ic, r2) = splitAt 5 r in [toString ic: genIdents r2]
+
+freshIdent :: Env String
+freshIdent = get >>= \(st, [ident:rest])-> put (st, rest) 
+    >>| case 'Map'.get ident st of
+        Nothing = pure ident
+        _       = freshIdent
+
+putIdent :: String Type -> Env Void
+putIdent i t = gets (\(st, r)->'Map'.get i st) >>= \mt -> case mt of
+    Nothing = modify (\(st, r)->('Map'.put i t st, r))
+    Just t2 = unify t t2 >>= \t3-> modify (\(st, r)->('Map'.put i t3 st, r))
+
+replace :: String Type -> Env Void
+replace ident type = get >>= \(st, fr)->put ('Map'.fromList $ 
+        map (itupdate ident type) ('Map'.toList st), fr)
+    where
+        itupdate :: String Type (String, Type) -> (String, Type)
+        itupdate ident newtype ov=:(key, IdType type) = if (ident == type)
+            (key, newtype) ov
+        itupdate ident newtype (key, TupleType (t1, t2))
+        # (_, t1) = itupdate ident newtype (key, t1)
+        # (_, t2) = itupdate ident newtype (key, t2)
+        = (key, TupleType (t1, t2))
+        itupdate ident newtype (key, ListType t1)
+        # (_, t1) = itupdate ident newtype (key, t1)
+        = (key, ListType t1)
+        itupdate _ _ k = k
+
+instance toString SemError where
+    toString (ParseError p e) = concat [
+        toString p,"SemError: ParseError: ", e]
+    toString (Error e) = "SemError: " +++ e
+    toString (UnifyError p t1 t2) = concat [
+        toString p,
+        "SemError: Cannot unify types. Expected: ",
+        toString t1, ". Given: ", toString t2]
+    toString (FieldSelectorError p t fs) = concat [
+        toString p,
+        "SemError: Cannot select ", toString fs, " from type: ",
+        toString t]
+    toString (OperatorError p o t) = concat [
+        toString p, 
+        "SemError: No ", toString o, " for type ",
+        toString t]
+    toString (UndeclaredVariableError p ident) = concat [
+        toString p, "SemError: identifier: ", ident, " undefined."]
+
+saveGamma :: Env Gamma
+saveGamma = get
+
+restoreGamma :: Gamma -> Env Void
+restoreGamma g = put g