Hi Haskellers, because I recognized that some people are discussing the Haskell report, I'd like to point out a problem concerning the operator precedences. At precedence level 9, there are the left associative operator (!!) and the right associative operator (.), but combining both directions doesn't make sense neither for me .. .. nor for ghci:
gs !! i . f cannot mix `(!!)' [infixl 9] and `(.)' [infixr 9] in the same infix expression
It appears sensible for me that (!!) associates to the left and I suppose that there is a strong requirement for (.), which is associative anyway (f.g).h = f.(g.h), to associate to the right, due to efficiency reasons. However, what's the problem with introducing a precedence level 10 and move (!!) upto it? Cheers Christoph
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Ch. A. Herrmann