On 31-08-2022 09:01, Damien Mattei wrote: > I always try to keep compatibility with RnRS and in fact except cond > none of when, unless, cond, case, while, and do are in standart RnRS schem 'when', 'unless' and 'do' are actually RnRS, see (rnrs control). 'case' is also RnRS, see (rnrs base). However, looking at (guile)while do, 'while' is indeed non-standard. Greetings, Maxime.