This analysis returns for each function f
all functions into which f
can
be replaced at the root. For instance, if there are the definitions:
f x = g x g x = h x h x = k x : []
k x = x
then the root replacements of f
are [g,h]
and the
root replacements of g
are [h].
This analysis could be useful to detect simple loops, e.g., if a function is in its own root replacement.