-instance toString AST where
- toString (AST v f) = concat (
- ["\n":printersperse "\n" v] ++
- ["\n":printersperse "\n" f])
-
-class print a :: a -> [String]
-
-printersperse :: String [a] -> [String] | print a
-printersperse i j = intercalate [i] (map print j)
-
-instance print FunDecl where
- print (FunDecl i as t vs ss) =
- ["\n", i, " (":printersperse "," as] ++
- [")"] ++ maybe [] (\tt->[" :: ":print tt]) t ++
- ["{\n\t":printersperse "\n\t" vs] ++
- ["\n":printStatements ss 1] ++ ["}\n"]
-
-printStatements :: [Stmt] Int -> [String]
-printStatements [] i = []
-printStatements [s:ss] i = (case s of
- (IfStmt b thens elses) = indent i ["if (":print b] ++ [")"] ++
- printCodeBlock thens i ++
- indent i ["else ":printCodeBlock elses i] ++ ["\n"]
- (WhileStmt b dos) = indent i ["while (":print b] ++
- [")":printCodeBlock dos i]
- (AssStmt vardef val) =
- indent i $ print vardef ++ ["=":print val] ++ [";\n"]
- (FunStmt fc) = indent i $ print fc ++ [";\n"]
- (ReturnStmt me) = indent i ["return ":maybe [""] print me] ++ [";\n"]
- ) ++ printStatements ss i
- where
- printCodeBlock :: [Stmt] Int -> [String]
- printCodeBlock [] _ = ["{}\n"]
- printCodeBlock [x] i = ["\n":printStatements [x] (i+1)]
- printCodeBlock x i =
- ["{\n":printStatements x (i+1)] ++ indent i ["}\n"]
-
- indent :: Int [String] -> [String]
- indent i rest = replicate i "\t" ++ rest
-
-instance print FunType where
- print (FunType at rt) = printersperse " " at ++
- [if (isEmpty at) "" "->":maybe ["Void"] print rt]
-
-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 (ListType t) = ["[":print t] ++ ["]"]
- print (IdType s) = print s
- print IntType = print "Int"
- print BoolType = print "Bool"
- print CharType = print "Char"
- print VarType = print "var"
-
-instance print String where
- print s = [s]
-
-instance print FieldSelector where
- print FieldHd = print "hd"
- print FieldTl = print "tl"
- print FieldSnd = print "snd"
- print FieldFst = print "fst"
-
-instance print VarDef where
- print (VarDef i fs) = printersperse "." [i:flatten $ map print fs]
-
-instance print FunCall where
- print (FunCall i args) = [i,"(":printersperse "," args] ++ [")"]
-
-instance print Expr where
- print (VarExpr vd) = print vd
- 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
- UnNegation = "!"; UnMinus = "-"
- :print e] ++ [")"]
- print (IntExpr i) = [toString i]
- print (CharExpr c) = ["\'", case c of
- '\b' = "\\b"; '\f' = "\\f"; '\n' = "\\n"
- '\r' = "\\r"; '\t' = "\\t"; '\v' = "\\v"
- c = if (c == toChar 7) "\\a" (toString c)
- ,"\'"]
- print (BoolExpr b) = [toString b]
- print (FunExpr fc) = print fc
- print EmptyListExpr = ["[]"]
- print (TupleExpr (e1, e2)) = ["(":print e1] ++ [",":print e2] ++ [")"]