*** ML ***
* Basic combinators map, fold, fold_map, split_list are available as
parameterized antiquotations, e.g. @{map 4} for lists of quadruples.
This refers to Isabelle/9f10d82e8188.
After seeing another split_list42 combinator, I could not resist to make a
fully general solution once and for all. The changset also eliminates
some clones that have accumulated over the years.
Isabelle/ML has antiquotations as some kind of macro language. It can do
certain things better than the C preprocessor, although one always needs
to be careful to stay within reason.
Makarius
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