Move Star and Arrow from Semigroups to Semigroupoids #127
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Mistakes were made...
So now that this fantasyland PR has been merged in, it provides exactly what we need to address this issue.
This PR does the following:
concat
withcompose
on bothStar
andArrow
empty
withid
onArrow
(for some sweetCategory
action)composeS
andpipeS
helper functions for composingSemigroupoid
sisCategory
andisSemigroupoid
predicate functions.