X-Git-Url: https://git.martlubbers.net/?a=blobdiff_plain;f=src%2Fparse.icl;h=ec89565f05c71a9645d3123df289adb81e73633b;hb=eb91d7c6b2010be6a43de0a978373654ba3deacc;hp=0f0f42c4dd3e97e4aba44ec5ea9dab232de7b132;hpb=1e30f02a706b29dae471b6526e7fd0e4bf5bf483;p=cc1516.git

diff --git a/src/parse.icl b/src/parse.icl
index 0f0f42c..ec89565 100644
--- a/src/parse.icl
+++ b/src/parse.icl
@@ -12,6 +12,7 @@ import Control.Applicative
 import Data.Func
 from Data.List import intercalate, replicate, instance Functor []
 from Text import class Text(concat), instance Text String
+import GenPrint
 
 import yard
 import lex
@@ -23,13 +24,14 @@ parser (Right r) = case runParser parseProgram r of
 	(Left e, _) = Left $ toString e
 
 parseProgram :: Parser Token AST
-parseProgram = liftM2 AST (many parseVarDecl) (some parseFunDecl)
+parseProgram = liftM2 AST (many parseVarDecl) (some parseFunDecl) 
+	<* satTok EndOfFileToken
 
 parseFunDecl :: Parser Token FunDecl
 parseFunDecl = liftM5 FunDecl
 	(parseIdent <* satTok BraceOpenToken)
 	(parseSepList CommaToken parseIdent <* satTok BraceCloseToken)
-	(parseFunType <* satTok CBraceOpenToken)
+	(optional parseFunType <* satTok CBraceOpenToken)
 	(many parseVarDecl)
 	(many parseStmt <* satTok CBraceCloseToken)
 
@@ -51,10 +53,11 @@ parseStmt = parseIfStmt <|> parseWhileStmt <|>
 
 		parseIfStmt :: Parser Token Stmt
 		parseIfStmt = liftM3 IfStmt
-			(satTok IfToken *> parseBBraces parseExpr)
-			(parseBlock <|> parseOneLine)
-			(liftM (fromMaybe []) 
-				(optional (satTok ElseToken *> (parseBlock<|> parseOneLine))))
+            (satTok IfToken *> parseBBraces parseExpr)
+            (parseBlock <|> parseOneLine)
+            (liftM (fromMaybe []) 
+                (optional (satTok ElseToken *> (parseBlock<|> parseOneLine))))
+
 
 		parseWhileStmt :: Parser Token Stmt
 		parseWhileStmt = satTok WhileToken *> 
@@ -67,17 +70,8 @@ parseStmt = parseIfStmt <|> parseWhileStmt <|>
 		//first pure makes singleton list from the statement
 		parseOneLine = liftM pure parseStmt
 
-parseBBraces :: (Parser Token a) -> Parser Token a
-parseBBraces p = satTok BraceOpenToken *> p <* satTok BraceCloseToken
-
-parseBCBraces :: (Parser Token a) -> Parser Token a
-parseBCBraces p = satTok CBraceOpenToken *> p <* satTok CBraceCloseToken
-
-parseBSqBraces :: (Parser Token a) -> Parser Token a
-parseBSqBraces p = satTok SquareOpenToken *> p <* satTok SquareCloseToken
-
 parseFunType :: Parser Token FunType
-parseFunType = satTok DoubleColonToken *>
+parseFunType = satTok DoubleColonToken *> 
 	(parseInOutType <|> (liftM (FunType []) parseVoidOrType))
 	where
 		parseInOutType :: Parser Token FunType
@@ -86,7 +80,7 @@ parseFunType = satTok DoubleColonToken *>
 
 		parseVoidOrType :: Parser Token (Maybe Type)
 		parseVoidOrType = (satTok VoidToken *> pure Nothing) <|> 
-			(liftM Just parseType)
+			(liftM Just parseType) <|> pure Nothing
 
 parseVarDecl :: Parser Token VarDecl
 parseVarDecl = liftM3 VarDecl
@@ -100,12 +94,9 @@ parseType =
 	trans1 CharTypeToken CharType <|>
 	trans1 BoolTypeToken BoolType <|>
 	(liftM ListType (parseBSqBraces parseType)) <|>
-	(liftM2 TupleType 
-		(satTok BraceOpenToken *> parseType <* satTok CommaToken)
-		(parseType <* satTok BraceCloseToken)) <|>
+	(liftM TupleType (parseTuple parseType)) <|>
 	(liftM IdType parseIdent)
 
-//TODO hieronder omzetten naar liftm notatie
 parseExpr :: Parser Token Expr
 parseExpr = //Operators in order of binding strength
 	parseOpR (trans1 ColonToken BiCons) $
@@ -135,59 +126,72 @@ parseExpr = //Operators in order of binding strength
 
 		parseBasicExpr :: Parser Token Expr
 		parseBasicExpr = 
-			(satTok BraceOpenToken *> parseExpr <* satTok CommaToken 
-				>>= \e1->parseExpr <* satTok BraceCloseToken 
-				>>= \e2->pure $ TupleExpr e1 e2) <|>
-			(parseFunCall >>= \fc->pure $ FunExpr fc) <|>
+			(liftM TupleExpr (parseTuple parseExpr)) <|>
+			(liftM FunExpr parseFunCall) <|>
 			parseBBraces parseExpr <|>
 			trans1 EmptyListToken EmptyListExpr <|>
-			trans2 TrueToken (const $ BoolExpr True) <|>
-			trans2 FalseToken (const $ BoolExpr False) <|>
+			trans1 TrueToken (BoolExpr True) <|>
+			trans1 FalseToken (BoolExpr False) <|>
 			trans2 (NumberToken zero) (\(NumberToken i)->IntExpr i) <|>
 			trans2 (CharToken zero) (\(CharToken c)->CharExpr c) <|>
-			(parseOp1 >>= \o->parseExpr >>= \e.pure $ Op1Expr o e) <|>
-			(parseVarDef >>= \ve->pure $ VarExpr ve)
+			(liftM2 Op1Expr parseOp1 parseExpr) <|>
+			(liftM VarExpr parseVarDef)
 
 parseFunCall :: Parser Token FunCall
-parseFunCall = parseIdent <* satTok BraceOpenToken 
-	>>= \i->parseSepList CommaToken parseExpr 
-	<* satTok BraceCloseToken >>= \es->pure $ FunCall i es
+parseFunCall = liftM2 FunCall
+	parseIdent (parseBBraces $ parseSepList CommaToken parseExpr)
 
 parseVarDef :: Parser Token VarDef
-parseVarDef = parseIdent 
-	>>= \i-> many (satTok DotToken *> (
+parseVarDef = liftM2 VarDef
+	parseIdent 
+	(many (satTok DotToken *> (
 		(parseIdent >>= (\i.if (i == "hd") (pure FieldHd) empty)) <|>
 		(parseIdent >>= \i.if (i == "tl") (pure FieldTl) empty) <|>
 		(parseIdent >>= \i.if (i == "fst") (pure FieldFst) empty) <|>
-		(parseIdent >>= \i.if (i == "snd") (pure FieldSnd) empty))
-	) >>= \f->pure $ VarDef i f
+		(parseIdent >>= \i.if (i == "snd") (pure FieldSnd) empty))))
 
 parseOp1 :: Parser Token Op1
-parseOp1 = trans1 DashToken UnMinus <|> 
-	trans1 ExclamationToken UnNegation
+parseOp1 = trans1 DashToken UnMinus <|> trans1 ExclamationToken UnNegation
+
+parseBBraces :: (Parser Token a) -> Parser Token a
+parseBBraces p = satTok BraceOpenToken *> p <* satTok BraceCloseToken
+
+parseBCBraces :: (Parser Token a) -> Parser Token a
+parseBCBraces p = satTok CBraceOpenToken *> p <* satTok CBraceCloseToken
+
+parseBSqBraces :: (Parser Token a) -> Parser Token a
+parseBSqBraces p = satTok SquareOpenToken *> p <* satTok SquareCloseToken
+
+parseTuple :: (Parser Token a) -> Parser Token (a, a)
+parseTuple p = satTok BraceOpenToken *> 
+	(liftM2 (\a->(\b->(a,b))) (p <* satTok CommaToken) p) 
+	<* satTok BraceCloseToken
 
 trans2 :: TokenValue (TokenValue -> a) -> Parser Token a
-trans2 t f = satTok t >>= \(_, r).pure (f r)
+trans2 t f = liftM (f o thd3) $ satTok t
 
 trans1 :: TokenValue a -> Parser Token a
 trans1 t r = trans2 t $ const r
 
+derive gPrint TokenValue
 derive gEq TokenValue
 satTok :: TokenValue -> Parser Token Token
-satTok t = satisfy $ eq t
+satTok t = top >>= \tok=:(pos1, pos2, tv) -> if (eq t tok) 
+                                            (return tok) 
+                                            (fail <?> (printToString tv+++printToString t, pos1))
 	where
-		eq (IdentToken _) (_, IdentToken _) = True
-		eq (NumberToken _) (_, NumberToken _) = True
-		eq (CharToken _) (_, CharToken _) = True
-		eq x (_, y) = gEq {|*|} x y
+		eq (IdentToken _) (_, _, IdentToken _) = True
+		eq (NumberToken _) (_, _, NumberToken _) = True
+		eq (CharToken _) (_, _, CharToken _) = True
+		eq x (_, _, y) = gEq {|*|} x y
 
 parseSepList :: TokenValue (Parser Token a) -> Parser Token [a]
 parseSepList sep p = 
-	(some (p <* satTok sep) >>= \es->p >>= \e.pure $ reverse [e:es]) <|>
-	(p >>= \e->pure [e]) <|> pure []
+	(liftM2 (\es->(\e->reverse [e:es])) (some (p <* satTok sep)) p) <|>
+	(liftM pure p) <|> pure empty
 
 parseIdent :: Parser Token String
-parseIdent = trans2 (IdentToken []) (\(IdentToken e).toString e)
+parseIdent = trans2 (IdentToken "") (\(IdentToken e).toString e)
 
 instance toString AST where
 	toString (AST v f) = concat (
@@ -202,9 +206,9 @@ printersperse i j = intercalate [i] (map print j)
 instance print FunDecl where
 	print (FunDecl i as t vs ss) =
 		["\n", i, " (":printersperse "," as] ++
-		[") :: ":print t] ++
-		["{":printersperse "\n\t" vs] ++
-		["\n":printStatements ss 1] ++ ["}"]
+		[")"] ++ maybe [] (\tt->[" :: ":print tt]) t ++
+		["{\n\t":printersperse "\n\t" vs] ++
+		["\n":printStatements ss 1] ++ ["}\n"]
 
 printStatements :: [Stmt] Int -> [String]
 printStatements [] i = []
@@ -221,7 +225,7 @@ printStatements [s:ss] i = (case s of
 	) ++ printStatements ss i
 	where
 		printCodeBlock :: [Stmt] Int -> [String]
-		printCodeBlock [] _ = ["{}"]
+		printCodeBlock [] _ = ["{}\n"]
 		printCodeBlock [x] i = ["\n":printStatements [x] (i+1)]
 		printCodeBlock x i =
 			["{\n":printStatements x (i+1)] ++ indent i ["}\n"]
@@ -237,7 +241,7 @@ instance print VarDecl where
 	print (VarDecl t i e) = print t ++ [" ":i:"=":print e] ++ [";"]
 
 instance print Type where
-	print (TupleType t1 t2) = ["(":print t1] ++ [",":print t2] ++ [")"]
+	print (TupleType (t1, t2)) = ["(":print t1] ++ [",":print t2] ++ [")"]
 	print (ListType t) = ["[":print t] ++ ["]"]
 	print (IdType s) = print s
 	print IntType = print "Int"
@@ -280,4 +284,4 @@ instance print Expr where
 	print (BoolExpr b) = [toString b]
 	print (FunExpr fc) = print fc
 	print EmptyListExpr = ["[]"]
-	print (TupleExpr e1 e2) = ["(":print e1] ++ [",":print e2] ++ [")"]
+	print (TupleExpr (e1, e2)) = ["(":print e1] ++ [",":print e2] ++ [")"]