added test files for variable declaration parsing

[cc1516.git] / src / parse.icl

diff --git a/src/parse.icl b/src/parse.icl
index 800d3ed..aca2489 100644 (file)
--- a/src/parse.icl
+++ b/src/parse.icl
@@ -49,7 +49,7 @@ parseType =
        empty
 
 parseExpr :: Parser Token Expr
-parseExpr = 
+parseExpr = //Operators in order of binding strength
        parseOpRight (trans1 ColonToken BiCons) $
        parseOpRight (trans1 PipesToken BiOr) $
        parseOpRight (trans1 AmpersandsToken BiAnd) $
@@ -64,7 +64,7 @@ parseExpr =
        parseOpLeft (trans1 StarToken BiTimes <|>
                        trans1 SlashToken BiDivide <|>
                        trans1 PercentToken BiMod) $
-               parseBasicExpr
+       parseBasicExpr
        where
                parseOpRight :: (Parser Token Op2) (Parser Token Expr) -> Parser Token Expr
                parseOpRight ops prev = prev >>= \e1->optional (
@@ -78,27 +78,20 @@ parseExpr =
 
                parseBasicExpr :: Parser Token Expr
                parseBasicExpr = 
-                       (satTok BraceOpenToken *> parseExpr <* satTok BraceCloseToken) <|>
                        (satTok BraceOpenToken *> parseExpr <* satTok CommaToken 
                                >>= \e1->parseExpr <* satTok BraceCloseToken 
                                >>= \e2->pure $ TupleExpr e1 e2) <|>
+                       (parseIdent <* satTok BraceOpenToken 
+                               >>= \i->parseSepList CommaToken parseExpr <* satTok BraceCloseToken
+                               >>= \es->pure $ FunExpr i es) <|>
+                       (satTok BraceOpenToken *> parseExpr <* satTok BraceCloseToken) <|>
                        trans1 EmptyListToken EmptyListExpr <|>
                        trans2 TrueToken (const $ BoolExpr True) <|>
                        trans2 FalseToken (const $ BoolExpr False) <|>
                        trans2 (NumberToken zero) (\(NumberToken i)->IntExpr i) <|>
                        trans2 (CharToken zero) (\(CharToken c)->CharExpr c) <|>
                        (parseOp1 >>= \o->parseExpr >>= \e.pure $ Op1Expr o e) <|>
-                       (parseIdent <* satTok BraceOpenToken 
-                               >>= \i->parseActArgs <* satTok BraceCloseToken
-                               >>= \es->pure $ FunExpr i es) <|>
-                       (parseIdent >>= \i. parseFieldSelector >>= \f.pure $ VarExpr i f)
-
-parseActArgs :: Parser Token [Expr]
-parseActArgs = 
-       (some (parseExpr <* satTok CommaToken) >>= \es->parseExpr 
-               >>= \e.pure [e:es]) <|>
-       (parseExpr >>= \e->pure [e]) <|>
-       empty
+                       (parseIdent >>= \i->parseFieldSelector >>= \f.pure $ VarExpr i f)
 
 parseOp1 :: Parser Token Op1
 parseOp1 = trans1 DashToken UnMinus <|> 
@@ -120,22 +113,41 @@ trans1 t r = trans2 t $ const r
 satTok :: TokenValue -> Parser Token Token
 satTok t = satisfy ((===) t)
 
+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 []
+
 parseIdent :: Parser Token String
 parseIdent = trans2 (IdentToken []) (\(IdentToken e).toString e)
 
 instance toString AST where
-       toString (AST v f) = concat (print v ++ ["\n":print f])
+       toString (AST v f) = concat (
+               ["\n":strJoin "\n" (map print v)] ++
+               ["\n":strJoin "\n" (map print f)])
 
 class print a :: a -> [String]
 
-instance print [a] | print a where
-       print [] = ["\n"]
-       print [v:vs] = print v ++ ["\n":print vs]
+instance print FunDecl where
+       print (FunDecl i as t vs ss) =
+               ["\n", i, " (":strJoin "," (map (\i->[i]) as)] ++
+               [") :: ":print t] ++
+               ["{\n\t":strJoin "\n\t" (map print vs)] ++
+               ["\n":printStatements ss 1] ++ ["\n}"]
+
+printStatements :: [Stmt] Int -> [String]
+printStatements _ _ = []
+
+//TODO
+instance print FunType where
+       print _ = []
+
+//TODO
+instance print Stmt where
+       print _ = []
 
 instance print VarDecl where
        print (VarDecl i t e) = print t ++ [" ":i:"=":print e] ++ [";"]
-instance print FunDecl where
-       print _ = ["Function printing not yet implemented"]
 
 instance print Type where
        print (TupleType t1 t2) = ["(":print t1] ++ [", ":print t2] ++ [")"]
@@ -146,20 +158,24 @@ instance print Type where
        print CharType = ["Char"]
        print VarType = ["var"]
 
+strJoin :: String [[String]] -> [String]
+strJoin _ [] = []
+strJoin j [s:rest] = s ++ flatten [[j:ss]\\ss<-rest]
+
 instance print Expr where
        print (VarExpr i Nothing) = [i]
        print (VarExpr i (Just mf)) = [i, case mf of
                FieldHd = ".hd"; FieldTl = ".tl"
                FieldSnd = ".snd"; FieldFst = ".fst"]
-       print (Op2Expr e1 o e2) = print e1 ++ [case o of
+       print (Op2Expr e1 o e2) = ["(":print e1] ++ [case o of
                BiPlus = "+"; BiMinus = "-"; BiTimes = "*"; BiDivide = "/"
                BiMod = "%"; BiEquals = "="; BiLesser = "<"; BiGreater = ">"
                BiLesserEq = "<="; BiGreaterEq = ">="; BiUnEqual = "!=";
                BiAnd = "&&"; BiOr = "||"; BiCons = ":"
-               :print e2]
-       print (Op1Expr o e) = [case o of
+               :print e2] ++ [")"]
+       print (Op1Expr o e) = ["(",case o of
                UnNegation = "!"; UnMinus = "-"
-               :print e]
+               :print e] ++ [")"]
        print (IntExpr i) = [toString i]
        print (CharExpr c) = ["\'", case c of
                '\b' = "\\b"; '\f' = "\\f"; '\n' = "\\n"
@@ -167,7 +183,6 @@ instance print Expr where
                c = if (c == toChar 7) "\\a" (toString c)
                ,"\'"]
        print (BoolExpr b) = [toString b]
-       print (FunExpr i es) = pe ++ flatten [[",":x]\\x<-tl pes]
-               where [pe:pes] = map print es
+       print (FunExpr i es) = [i,"(":strJoin "," (map print es)] ++ [")"]
        print EmptyListExpr = ["[]"]
        print (TupleExpr e1 e2) = ["(":print e1] ++ [",":print e2] ++ [")"]