04/04/20 03:50
>>441
このへんかな
Once again, it is emphasized that an implementation is free
to interpret a backquoted form as any form that, when evaluated,
will produce a result that is equal to the result implied by
the above definition. In particular, no guarantees are made
as to whether the constructed copy of the template will or
will not share list structure with the template itself.
cltl2
22.1.3. Macro Characters