[plt-scheme] is-a? for unit signatures

From: Dave Herman (dherman at ccs.neu.edu)
Date: Mon Apr 18 10:31:06 EDT 2005

With classes and interfaces I can build a predicate to test for 
interface implementation using is-a?. Is there an equivalent way to test 
a unit to see if it exports a given signature?

It seems like you might be able to hack this together with 
verify-linkage-signature-match, but that procedure has me crying uncle..


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