Am Mo., 31. Aug. 2020 um 19:03 Uhr schrieb Adam Nelson <xxxxxx@nels.onl>:

> I'm not sure what the correct term is when referring to a list form that could be either a procedure call, macro call, or special form. Perhaps "application" is the most general term? Or "list form"?

Your macro just does textual substitution, which is uncommon for the
usual derived forms/standard macro. So this may be the reason why
there is no established name.

You could write:

****

(nest <step> ... <initial datum>)

Syntax: <step> has the syntax (<datum> ... _ <datum> ...) and <initial
datum> can be any datum.

Semantics: A nest expression is evaluated by lexically replacing the
underscore in the last <step> with <initial datum> and then replacing
the underscore is the next to last <step> by that replacement and so
on until the underscore in the first <step> has been replaced. It is
an error if the resulting final replacement is not an expression,
which is then evaluated and its values are returned.

****