Please reply to the "Add Data.Foldable1 to base" -thread to keep
the discussion in one place.
Otherwise this opinion will most likely be ignored.
- Oleg
P.S. That said, foldMap1/semifoldMap/... can fold over *less*
things. It can fold over NonEmpty (list) but not over ordinary [].
Sorry about bikeshedding. However, 'semifoldable' would be super confusing.
If somebody saw 'semifoldMap' in the wild what would they think? Probably not that it can fold _more_ things than 'foldMap'.
'NonemptyFoldable', 'Semigroup.Foldable', 'SemigroupFoldable', and 'Foldable1', with 'sfoldMap', 'sgFoldMap', 'nonemptyFoldMap', or 'Semigroup.foldMap' may be long or meaningless to most, but at least they aren't actively misleading.
–Keith
On October 18, 2019 2:13:51 PM UTC, Oleg Grenrus <oleg.grenrus@iki.fi> wrote:Relating to Foldable1/NonEmptyFoldable, based in another discussion (in my foldable1 to base proposal), it looks like it might be called Semifoldable See https://mail.haskell.org/pipermail/libraries/2019-October/030030.html Yet, Semiset is different thing (based on wikipedia: https://en.wikipedia.org/wiki/Semiset). NonEmptySet is a good name, it doesn't need explanation. If someone feels that it's too long, they can introduce `type NESet = NonEmptySet` alias in their development. - Oleg On 20.9.2019 4.56, Ruben Astudillo wrote:On 19-09-19 22:17, Alexandre Esteves wrote:I do like the sound of `instance Foldable1 Set1` more than I do `instance NonEmptyFoldable NonEmptySet` <https://hackage.haskell.org/package/semigroupoids-5.3.3/docs/Data-Semigroup-Foldable.html#t:Foldable1>I prefer it too, I just wish (future) documentation included a little explanation on why the suffix 1 was put.
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