Any scheme that supports t-expressions https://srfi.schemers.org/srfi-110/srfi-110.html https://srfi.schemers.org/srfi-110/srfi-110.html But that has a lot of

Any scheme that supports t-expressions https://srfi.schemers.org/srfi-110/srfi-110.html https://srfi.schemers.org/srfi-110/srfi-110.html But that has a lot of pushback, and no scheme I've researched supported (implemented the SRFI) t-expressions out of the box. Usually it's some third party library or runtime you have to use for that. Have played around a bit with it in GNU Guile, but in some circumstances I myself got confused :)