[isabelle-dev] "canonical" left-fold combinator for lists
florian.haftmann at informatik.tu-muenchen.de
Fri Jan 13 21:13:59 CET 2012
> Here is what I suggest: If there is a concensus that the argument
> order of List.fold is more useful than the existing foldl, then we
> should simply *replace* foldl with the new fold. Otherwise we should
> get rid of the new List.fold.
for short: I have no objections to get rid of foldl.
There were indeed some considerations before introducing List.fold into
Main HOL (being present in HOL-Library since around early summer 2010).
At some time I will set out them on the mailing list.
The only remark on the discussion about »canonicity« I want to add is
that the use of the word »canonical« is quite canonical in our
community, no matter how canonical Ubuntu is.
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