The construct is wrong:
+ construct l == ref l
That causes shared structure, and 'ref copy l' will not work either.
This problem is coupled with the other thread "copy of AssociationList".
Namely, we should implement 'deep copy' of List of Record and
use that in 'construct' and 'copy':
deepcopy(x : List Record(...)) : List Record(...) ==
y := empty()
while not empty? x repeat
y := concat(copy first x, y)
x := rest x
reverse! y
construct l == ref deepcopy l
copy l == ref deepcopy deref l
BTW, I think we can use List Record instead of Reference List Record
as Rep.
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