[Haskell-cafe] Re: Non Empty List?
gue.schmidt at web.de
Thu Jun 4 19:54:06 EDT 2009
Dan Weston schrieb:
> Unless I'm missing something in your description, why not
> data Container a = Single a | Many a a [a]
the above solution would still allow to construct, for instance,
Many 5 42  :: Container Int
The reason why I'm trying to find the design for a data structure in
which this would not even be possible is to be able to avoid writing
additional "bookkeeping" code into the functions that operate on the
structure, ie. the lookups, inserts, delete etc.
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