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Opaque syntax objects

The issue has come up in the discussion, but hasn't really been in the
focus yet:

I'd like to suggest that compound expressions be represented by an
opaque type rather than by pairs.  This would ensure a modicum of
abstraction, and would *really* make comprehensive the ability of all
syntax objects to carry location information.  I've come to appreciate
this added layer of abstraction in PLT Scheme.

Cheers =8-} Mike
Friede, Völkerverständigung und überhaupt blabla