[R6RS] SYNTAX-CASE

[Marc Feeley]

> In the interest of moving forward while Manuel considers how we might
> create a compatible general-purpose matcher, I would like for us to vote
> to include syntax-case while leaving open the possibility of changing
> the pattern matcher at a later time.  In other words, I'd like for us
> to have, by default, a subset of syntax-case essentially as it exists
> today, so that we have some version of it in R6RS even if we fail to
> come up with a compatible general matcher.

Does anyone object to voting on syntax-case?  If there are no
objections by tomorrow evening we'll put it up for a vote.

Overall I like syntax-case so I will vote in favour.  The things I
dislike are identifier-syntax (I would prefer that functionality to
be integrated into syntax-case), and that syntax-case can match
non-syntax objects (but Kent's latest proposal has fixed this).

I wish however I could have more experience with using syntax-case.
I tried integrating the portable implementation into Gambit, but
I still can't figure out how to get source-code correlation to work.
Kent, if you have some pointers that would be greatly appreciated.

Marc