Language extension / "behavior"

[Martin Simmons]

>>>>> 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/