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module Lexer where
import Text.Parsec
import Text.Parsec.Language (emptyDef)
import Text.Parsec.String (Parser)
import qualified Text.Parsec.Token as T
scanner :: T.TokenParser ()
scanner = T.makeTokenParser style
where
ops = ["+", "*", "-", ";"]
names = ["module", "private", "def", "return", "->"]
style =
emptyDef
{ T.commentLine = "//",
T.reservedOpNames = ops,
T.reservedNames = names
}
integer :: Parser Integer
integer = T.integer scanner
parens :: Parser a -> Parser a
parens = T.parens scanner
braces :: Parser a -> Parser a
braces = T.braces scanner
commaSep :: Parser a -> Parser [a]
commaSep = T.commaSep scanner
colonSep :: Parser String
colonSep = T.colon scanner
identifier :: Parser String
identifier = T.identifier scanner
reserved :: String -> Parser ()
reserved = T.reserved scanner
reservedOp :: String -> Parser ()
reservedOp = T.reservedOp scanner
scan :: Parser a -> Parser a
scan p = do
T.whiteSpace scanner
r <- p
eof
return r
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