Hello,

I thought that the whole purpose of switch was to compare some value to the result of evaluated forms. I don't think it is nice to impose a restriction that avoid using evaluated variables and forms, and I didn't quite understand why it should.

As for allow either an atom or a list of forms, I don't like it very much, but it should be more or less ok. Some particular cases should be analyzed first, though, like

(switch (something)
('some-symbol ...)
(*some-variable* ...)
...)

It could lead to a wrong interpretation unless you explicitly test if the first symbol of your list is quote. Another solution is to require the user to write more parenthesis

(switch (something)
(('some-symbol) ...)
(*some-variable* ...)
...)

An alternative to avoid this and other problems (e.g. excessive parenthesis) is to allow the use of some key, like:

(switch (something)
((:any value1 value2 ...) ...)
((car some-list) ...)
...)

In my opinion, this would be much better. Using the key :member instead of :any would be a good option too.

Cheers,

Gustavo.