I've forgot to put SRFI ML, accidentally. So resend.

> Well, a specific implementation will know how cursors are represented,
> and cursors must be disjoint from indexes and #f, so in context
> you always know what a cursor is.
I meant not for specific implementation but users. If users want to make
something similar procedures on top the SRFI, then they probably want to
know if the given object is cursor or index.

Cheers,
--
_/_/
Takashi Kato
E-mail: ktakashi19@gmail.com