>>>>> On Tue, 24 Jan 2023 10:47:49 +0100, Didier Verna said: > > Section 1.6 Language Extensions of the standard says this: > > A language extension is any documented implementation-defined behavior > of a defined name in this standard that varies from the behavior > described in this standard [...] > > > It is unclear to me if the term "behavior" could encompass additional > keyword arguments passed to a function or macro.
I think it does, because section 3.5.1.4 Unrecognized Keyword Arguments says that an error must be signaled for unrecognized keywords in a safe call, so that will not happen for an extension keyword. -- Martin Simmons LispWorks Ltd http://www.lispworks.com/
