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[Scheme-reports] 6.1 Exceptions needs examples

I find the 6.1 Exceptions sections hard to "grok".  The consequences
are non-obvious.  There is no example showing normal recommended usage,
and there are few showing corner cases.

In an implementation like Kawa without full call/cc support
it should still be possible to support "normal" non-continuable
exception handling, hopefully in a way that makes use of and
integrates with native JVM exceptions.  To design and implement
that it would be very helpful if the report had some examples
of recommended exception-handling style.

(I do hope someday to support full call/cc in Kawa, but it is
unlikely to ever becomes supported by the default calling
convention unless the JVM gets "native" support - which has
been proposed and even prototyped.)
	--Per Bothner
per@x   http://per.bothner.com/

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