import StdString
import StdTuple
import StdList
-from StdFunc import const
+from StdFunc import const, o
import Data.Either
import Data.Functor
import Data.Maybe
import Control.Monad
import Control.Applicative
import Data.Func
-from Data.List import intercalate, replicate
+from Data.List import intercalate, replicate, instance Functor []
from Text import class Text(concat), instance Text String
+import GenPrint
import yard
import lex
(Left e, _) = Left $ toString e
parseProgram :: Parser Token AST
-parseProgram = many parseVarDecl
- >>= \vd->some parseFunDecl
- >>= \fd->pure $ AST vd fd
+parseProgram = liftM2 AST (many parseVarDecl) (some parseFunDecl)
parseFunDecl :: Parser Token FunDecl
-parseFunDecl = parseIdent <* satTok BraceOpenToken
- >>= \ident->parseSepList CommaToken parseIdent <* satTok BraceCloseToken
- >>= \args->parseFunType <* satTok CBraceOpenToken
- >>= \funtype->many parseVarDecl
- >>= \vardecls->many parseStmt
- <* satTok CBraceCloseToken
- >>= \stmts->pure $ FunDecl ident args funtype vardecls stmts
+parseFunDecl = liftM5 FunDecl
+ (parseIdent <* satTok BraceOpenToken)
+ (parseSepList CommaToken parseIdent <* satTok BraceCloseToken)
+ (parseFunType <* satTok CBraceOpenToken)
+ (many parseVarDecl)
+ (many parseStmt <* satTok CBraceCloseToken)
parseStmt :: Parser Token Stmt
-parseStmt = parseIfStmt <|>
- parseWhileStmt <|>
- parseSColon parseAssStmt <|>
- parseSColon parseReturnStmt <|>
- (parseSColon parseFunCall >>= \fc->pure $ FunStmt fc)
+parseStmt = parseIfStmt <|> parseWhileStmt <|>
+ parseSColon parseAssStmt <|> parseSColon parseReturnStmt <|>
+ (liftM FunStmt (parseSColon parseFunCall))
where
parseSColon :: (Parser Token a) -> Parser Token a
parseSColon p = p <* satTok SColonToken
parseReturnStmt :: Parser Token Stmt
- parseReturnStmt = satTok ReturnToken
- *> optional parseExpr >>= \me->pure $ ReturnStmt me
+ parseReturnStmt =
+ satTok ReturnToken *> liftM ReturnStmt (optional parseExpr)
parseAssStmt :: Parser Token Stmt
- parseAssStmt = parseVarDef <* satTok AssignmentToken
- >>= \var-> parseExpr >>= \expr->pure $ AssStmt var expr
+ parseAssStmt =
+ liftM2 AssStmt (parseVarDef <* satTok AssignmentToken) parseExpr
parseIfStmt :: Parser Token Stmt
- parseIfStmt = satTok IfToken
- *> parseBBraces parseExpr
- >>= \pred->(parseBlock <|> parseOneLine)
- >>= \thens->optional (
- satTok ElseToken *> (parseBlock <|> parseOneLine)
- )>>= \elses->pure $ IfStmt pred thens (fromMaybe [] elses)
+ parseIfStmt = liftM3 IfStmt
+ (satTok IfToken *> parseBBraces parseExpr)
+ (parseBlock <|> parseOneLine)
+ (liftM (fromMaybe [])
+ (optional (satTok ElseToken *> (parseBlock<|> parseOneLine))))
parseWhileStmt :: Parser Token Stmt
- parseWhileStmt = satTok WhileToken *> parseBBraces parseExpr
- >>= \pred->parseBlock >>= \body->pure $ WhileStmt pred body
+ parseWhileStmt = satTok WhileToken *>
+ liftM2 WhileStmt (parseBBraces parseExpr) parseBlock
parseBlock :: Parser Token [Stmt]
parseBlock = parseBCBraces (many parseStmt)
parseOneLine :: Parser Token [Stmt]
- parseOneLine = parseStmt >>= \s->pure [s]
+ //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 *>
- (parseInOutType <|> (parseVoidOrType >>= \t->pure $ FunType [] t))
+parseFunType = satTok DoubleColonToken *>
+ (parseInOutType <|> (liftM (FunType []) parseVoidOrType))
where
parseInOutType :: Parser Token FunType
- parseInOutType = some parseType <* satTok ArrowToken
- >>= \intypes-> parseVoidOrType
- >>= \outtypes->pure $ FunType intypes outtypes
+ parseInOutType = liftM2 FunType
+ (some parseType <* satTok ArrowToken) parseVoidOrType
parseVoidOrType :: Parser Token (Maybe Type)
parseVoidOrType = (satTok VoidToken *> pure Nothing) <|>
- (parseType >>= \type->pure $ Just type)
+ (liftM Just parseType)
parseVarDecl :: Parser Token VarDecl
-parseVarDecl =
+parseVarDecl = liftM3 VarDecl
(parseType <|> trans1 VarToken VarType )
- >>= \t->parseIdent <* satTok AssignmentToken
- >>= \i->parseExpr <* satTok SColonToken
- >>= \e->pure $ VarDecl i t e
+ (parseIdent <* satTok AssignmentToken)
+ (parseExpr <* satTok SColonToken)
parseType :: Parser Token Type
parseType =
trans1 IntTypeToken IntType <|>
trans1 CharTypeToken CharType <|>
trans1 BoolTypeToken BoolType <|>
- (satTok SquareOpenToken *> parseType <* satTok SquareCloseToken
- >>= \t.pure $ ListType t) <|>
- (satTok BraceOpenToken *> parseType <* satTok CommaToken
- >>= \t1->parseType <* satTok BraceCloseToken
- >>= \t2->pure $ TupleType t1 t2) <|>
- (parseIdent >>= \e.pure $ IdType e) <|>
- empty
+ (liftM ListType (parseBSqBraces parseType)) <|>
+ (liftM2 TupleType
+ (satTok BraceOpenToken *> parseType <* satTok CommaToken)
+ (parseType <* satTok BraceCloseToken)) <|>
+ (liftM IdType parseIdent)
+//TODO hieronder omzetten naar liftm notatie
parseExpr :: Parser Token Expr
parseExpr = //Operators in order of binding strength
parseOpR (trans1 ColonToken BiCons) $
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 ((===) t)
+satTok t = top >>= \tok=:(pos, tv) -> if (eq t tok) (return tok) (fail <?> (printToString tv, pos))
+ where
+ 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 =
printCodeBlock [] _ = ["{}"]
printCodeBlock [x] i = ["\n":printStatements [x] (i+1)]
printCodeBlock x i =
- ["{\n":printStatements x (i+1)] ++ indent i ["}"]
+ ["{\n":printStatements x (i+1)] ++ indent i ["}\n"]
indent :: Int [String] -> [String]
indent i rest = replicate i "\t" ++ rest
[if (isEmpty at) "" "->":maybe ["Void"] print rt]
instance print VarDecl where
- print (VarDecl i t e) = print t ++ [" ":i:"=":print e] ++ [";"]
+ print (VarDecl t i e) = print t ++ [" ":i:"=":print e] ++ [";"]
instance print Type where
print (TupleType t1 t2) = ["(":print t1] ++ [",":print t2] ++ [")"]