R6RS provides support for #; nested sexp comments, and #| ... |# nested block comments. Do we include either or both of these?
Kawa and s7 don't properly nest #|...|# comments.
For the record, I consciously chose not to support #|...|# in Chibi. I just think it's ugly. But I'm not particularly set on this.
I'm good with #; I really dislike #| ... |#
I use #; and #||# extensively, and I do think that we should have some way of doing block comments.
For the record, #|...|# and #; are specified by SRFI 30 and SRFI 62 respectively.
The WG voted to accept both possibilities.
To be revoted because there was no simple majority.
Both will be added.
PLT, Gauche, MIT, Gambit, Chicken, Bigloo, Kawa, SISC, Chez support both #; and #| ... |#.
Chibi supports only #;. (Fix that, willya, Alex?)
Scheme48/scsh, s7, SCM, sxm supports only #| ... |#.
Guile, Scheme 9, sscm, vscm don't support either one.
SCM has an incompatible meaning of #;.
I recommend including support for both #; and #|...|#.