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macros expanding into definitions
Date: Tue, 1 Dec 1992 13:23:48 -0500
From: "R. Kent Dybvig" <dyb@garbo.cs.indiana.edu>
Yes. We should change the report to convert begin into a "splicing"
construct when it appears at top level or within the body of a lambda
or similar form. That is, (begin form ...) should be valid iff
form ... is valid in those contexts, and it should have the same
meaning. That is what the current syntax-case implementation does,
although due to a bogus optimization, the distributed version messes it
up in the case where the begin is the only expression in a lambda
body. With this rule, your first definition of define-multiple works
both at top level and internally:
I agree. I thought it was the intent of one of the last changes to
the semantics of BEGIN to make it splicing, but I guess I was
confused.