reporting nested forms
Andreas Roehler writes:
IMHO a routine detecting nested forms is needed - for
all kind of things which have a start and a end.
What is it you need that a sexp (s-expression, balanced expression)
doesn't give you?
Such a form should take start and end as arguments,
then report nesting levels and positions of beginnings
and ends.
Well, really it ought to take a list of start-end pairs, no?
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