> Bill, I'm sure you've noticed that we did write all.equal.environment()
> to work recursively... Actually, I had worked quite a bit at
> that, too long ago to remember details, but the relevant svn log
> entry is
> ------------------------------------------------------------------------
> r66640 | maechler | 2014-09-18 22:10:20 +0200 (Thu, 18 Sep 2014) | 1 line
>
> more sophisticated all.equal.environment(): no longer "simple" infinite
> recursions
> ------------------------------------------------------------------------
I haven't checked the above reference.
But I would like to note the following behaviour:
#e group
e = new.env ()
e1 = new.env ()
e$e = e1
e1$e = e
#f group
f = new.env ()
f1 = new.env ()
f2 = new.env ()
f$e = f1
f1$e = f2
f2$e = f
all.equal (e, f)
I tried a number of examples with circular references.
All worked correctly, except for "identical" environments nested an
unequal number of times.
I suspect there may be other special cases.
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