Why isn't 〉 allowed as an infix operator in Haskell?
GHCi, version 8.0.2: http://www.haskell.org/ghc/ :? for help
Prelude> :{
infixr 6 〉
(〉) :: Int -> (Int -> (Int))
a 〉 b = a + 2*b
:}
print (1 〉 2)
According to this Haskell Report any Unicode symbol or punctuation
and this question it should work.
It's probably a bug. It doesn't seem to allow any characters marked as ClosePunctuation
or OpenPunctuation
by generalCategory
. I suggest you open a ticket on the GHC Trac and see what they think.
https://ghc.haskell.org/trac/ghc/ticket/2687 looks related and suggests that at least at some point OpenPunctuation
and ClosePunctuation
were considered graphic rather than symbol.
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