Am Fr., 28. Aug. 2020 um 07:59 Uhr schrieb Marc Nieper-Wißkirchen <xxxxxx@nieper-wisskirchen.de>: > > PS Thinking about it once more, you need custom placeholders not for nested uses of nest but for other forms where you don't want to replace _: > > (nest <> > (<> _) > quote) Actually, this is the same use case as in your SRFI 204 implementation...