Safe Haskell	Safe-Inferred
Language	Haskell2010

BNFC.Lexing

Synopsis

mkLexer :: CF -> [(Reg, LexType)]
data LexType
- = LexComment
- | LexToken String
- | LexSymbols
mkRegMultilineComment :: String -> String -> Reg
mkRegSingleLineComment :: String -> Reg
debugPrint :: Reg -> IO ()

Documentation

mkLexer :: CF -> [(Reg, LexType)] Source #

data LexType Source #

Constructors

LexComment
LexToken String
LexSymbols

Instances

Instances details

Show LexType Source #
Instance details Defined in BNFC.Lexing Methods showsPrec :: Int -> LexType -> ShowS show :: LexType -> String showList :: [LexType] -> ShowS
Eq LexType Source #
Instance details Defined in BNFC.Lexing Methods (==) :: LexType -> LexType -> Bool (/=) :: LexType -> LexType -> Bool

mkRegMultilineComment :: String -> String -> Reg Source #

Create regex for multiline comments.

>>> debugPrint $ mkRegMultilineComment "<" ">"
'<'(char-'>')*'>'

>>> debugPrint $ mkRegMultilineComment "/*" "*/"
{"/*"}(char-'*')*'*'((char-["*/"])(char-'*')*'*'|'*')*'/'

>>> debugPrint $ mkRegMultilineComment "<!--" "-->"
{"<!--"}(char-'-')*'-'((char-'-')+'-')*'-'((char-["->"])(char-'-')*'-'((char-'-')+'-')*'-'|'-')*'>'

mkRegSingleLineComment :: String -> Reg Source #

Create regex for single line comments >>> debugPrint $ mkRegSingleLineComment "--" {"--"}char*'n'

debugPrint :: Reg -> IO () Source #