idea: Convenience accessor of aggregate objects, like let-hash in Gerbil

[shirok]

Gerbil has (let-hash hash body ...), where, inside a body, a reader macro .x is read as (hash-ref hash 'x). It looks convenient to quickly accses multiple parts of the given aggregate.

https://gerbil.scheme.org/reference/std/sugar.html#let-hash

We can make it generic by using universal accessor.

CL's with-slots is similar, but you explicitly binds the "variables" (in fact, it is an identifier macro). It doesn't need to introduce a new reader macro, neither an implicit varriable reference, which is a plus. But Gerbil's way can be more concise.