[Haskell-cafe] Fixity of >>>

[Donald Bruce Stewart]

There's a theory this should work:

    getContents >>= lines >>> map read >>> sum >>> print

But unfortunately we have:

     `(>>=)' [infixl 1] 
     `(>>>)' [infixr 1]

Meaning we must write:

    getContents >>= (lines >>> map read >>> sum >>> print)

Indeed, all Arrow ops are infixr. 
Are there any technical/compelling reasons for this?

-- Don