I really think the scheme SRFI 166 is the nices formatting utility I have worked with: https://srfi.schemers.org/srfi-166/srfi-166.html https://srfi.schemers.or

I really think the scheme SRFI 166 is the nices formatting utility I have worked with: https://srfi.schemers.org/srfi-166/srfi-166.html https://srfi.schemers.org/srfi-166/srfi-166.html Probably slow compared to format, but more easily extendable. The slowness could be fixed for the included formatters with something like CLs compiler macros