compiles and works again.

src/DearImGui/Plot/Generator/Parser.hs

@@ -99,6 +99,7 @@ plotHeaders = do
       (   ( Left  <$> try ignoreDefine)
       <|> ( Right <$> enumeration enumNamesAndTypes)
       <|> ( Left  <$> ignoreStruct)
+      <|> ( Left  <$> cppConditionalIgnore)
       )
       ( namedSection "Callbacks" )
 
@@ -442,6 +443,13 @@ cppConditional = do
   void $ skipManyTill anySingle ( cppDirective ( \case { "endif" -> Just (); _ -> Nothing } ) )
   void $ skipManyTill anySingle ( single EndCPPLine )
 
+cppConditionalIgnore :: MonadParsec e [Tok] m => m ()
+cppConditionalIgnore = do
+  void $ cppDirective ( \case { "ifdef" -> Just (); "ifndef" -> Just (); "if" -> Just (); _ -> Nothing } )
+  -- assumes no nesting
+  void $ skipManyTill anySingle ( cppDirective ( \case { "endif" -> Just (); _ -> Nothing } ) )
+  void $ skipManyTill anySingle ( single EndCPPLine )
+
 ignoreDefine :: MonadParsec e [Tok] m => m ()
 ignoreDefine = do
   void $ many comment