Hello ,
from http://community.livejournal.com/ru_declarative/54566.html
Q: how to see operators precedence in GHCi?
A:
Prelude> let showParen = (undefined::[[[[()]]]]->())
Prelude> showParen $ 2+3*4
<interactive>:1:12:
No instance for (Num [[[[()]]]])
arising from use of `+' at <interactive>:1:12
Probable fix: add an instance declaration for (Num [[[[()]]]])
In the second argument of `($)', namely `2 + (3 * 4)'
In the definition of `it': it = showParen $ (2 + (3 * 4))
Prelude>
--
Best regards,
Bulat mailto:[EMAIL PROTECTED]
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