fixup! [#6] Add a switch for allowing comments

Author: nalkuatov

core/src/Text/Interpolation/Nyan/Core/Internal/Base.hs

@@ -32,8 +32,6 @@ data IntData = IntData
 data ParsedIntPiece
   = PipString Text
     -- ^ Mere text.
-  | PipComments Text
-    -- ^ Comments.
   | PipNewline Text
     -- ^ Some line feed.
     -- This must be preferred over 'PipString'.

core/src/Text/Interpolation/Nyan/Core/Internal/Parser.hs

@@ -17,7 +17,7 @@ import Fmt (Builder, build, fmt)
 import Text.Interpolation.Nyan.Core.Internal.Base
 import Text.Megaparsec (Parsec, customFailure, eof, errorBundlePretty, label, lookAhead, parse,
                         single, takeWhile1P, takeWhileP)
-import Text.Megaparsec.Char (string)
+import Text.Megaparsec.Char.Lexer (skipLineComment)
 import Text.Megaparsec.Error (ShowErrorComponent (..))
 
 newtype OptionChanged = OptionChanged Bool
@@ -275,14 +275,11 @@ switchesHelpMessage sopts =
       , val /= defVal
       ]
 
-intPieceP :: Ord e => Parsec e Text [ParsedIntPiece]
-intPieceP = asum
-  [
+intPieceP :: Ord e => SwitchesOptions -> Parsec e Text [ParsedIntPiece]
+intPieceP SwitchesOptions{..} = asum [
 
-    -- consume comments
-    string "--" >>= \prefix -> do
-      content <- takeWhile1P Nothing (/= '\n')
-      pure $ one $ PipComments (prefix <> content)
+    -- ignore comments if 'commenting' switch is on
+    guard commenting *> skipLineComment "--" $> []
 
     -- consume normal text
   , one . PipString <$> takeWhile1P Nothing (notAnyOf [(== '\\'), (== '#'), isSpace])
@@ -362,7 +359,7 @@ intStringP
 intStringP sopts = do
   switches <- switchesSectionP sopts
   _ <- single '|'
-  pieces <- glueParsedStrings . concat <$> many intPieceP
+  pieces <- glueParsedStrings . concat <$> many (intPieceP switches)
   eof
   return (switches, pieces)
 

core/src/Text/Interpolation/Nyan/Core/Internal/Processor.hs

@@ -15,7 +15,6 @@ import Text.Interpolation.Nyan.Core.Internal.Base
 processIntString :: SwitchesOptions -> ParsedInterpolatedString -> InterpolatedString
 processIntString sopts istr = istr
   & V.fromList
-  & do if commenting sopts then skipComments else id
   & do if leadingNewlineStripping sopts then stripLeadingNewline else id
   & do if trailingSpacesStripping sopts then stripTrailingLeadingWs else id
   & do if indentationStripping sopts then stripCommonIndentation else id
@@ -31,8 +30,6 @@ processIntString sopts istr = istr
   where
     (&) = flip ($)
 
-    skipComments = V.filter \case PipComments{} -> False; _ -> True
-
     stripLeadingNewline ps = case V.uncons ps of
       Just (PipNewline _, ps') -> ps'
       _                        -> ps
@@ -48,9 +45,6 @@ processIntString sopts istr = istr
       PipString s ->
         let s' = trimText s
         in if T.null s' then Nothing else Just (PipString s')
-      PipComments s ->
-        let s' = trimText s
-        in if T.null s' then Nothing else Just (PipString s')
       p@PipInt{} -> Just p
 
     trimLeftSpaces ps = case V.uncons ps of
@@ -110,7 +104,6 @@ processIntString sopts istr = istr
           -- invisible spaces to break the newlines sequence.
           p@PipLeadingWs{} : l -> p : skipNext l
           p@PipString{} : l    -> p : reduceNext l
-          p@PipComments{} : l  -> p : reduceNext l
           p@PipInt{} : l       -> p : reduceNext l
           []                   -> []
 
@@ -120,7 +113,6 @@ processIntString sopts istr = istr
       PipNewline nl  -> IpString nl
       PipLeadingWs n -> IpString . mconcat $ replicate (fromIntegral n) " "
       PipEmptyLine   -> IpString mempty
-      PipComments s  -> IpString s
       PipInt i       -> IpInt i
 
     glueStrings :: InterpolatedString -> InterpolatedString