[plt-scheme] On PLaneT packages and compatible upgrades

From: Doug Orleans (dougorleans at gmail.com)
Date: Wed May 10 14:19:28 EDT 2006

Richard Cobbe writes:
 > However, it does proceed from the assumption that adding functionality
 > should be a compatible upgrade.  I'm wondering if we should continue to
 > hold to that assumption.

Again, invoking Java as precedent:


The language specification spells out in great detail which changes to
a package, class, or interface preserve "binary compatibility" and which
do not.  In particular, adding a new class and adding a new method to
an existing class do not.

--dougorleans at gmail.com

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