module Compiler.Lexer.Comments where

import Common
import Control.Applicative
import Control.Monad
import Data.Text as T
import Parser
import Test.Common

newtype Comment = Comment Text
  deriving (Show, Eq)

commentPrefix :: Text
commentPrefix = "-- "

instance HasParser Comment where
  parser = do
    void $ pText commentPrefix
    c <- many (nameParser "comment_char" $ pAny (\c -> c /= '\n'))
    (void $ pChar '\n') <|> eof
    incLine 1
    pure $ Comment (pack c)

instance ToSource Comment where
  toSourcePretty i (Comment c) = indent i <> commentPrefix <> c  <> "\n"

instance HasGen Comment where
  getGen = (Comment . T.append "comment_prefix") <$> (text (linear 0 50) (enum 'a' 'z'))