I updated the code on the wiki page: the previous version didn't handle prefix negation - did you implement that yourself in HLint?
No, I didn't implement prefix negation in HLint - it never came up as an issue. Perhaps the underlying HSE library dealt with it for me - Niklas would know.
In haskell-src-exts (and haskell-src, since that's inherited), unary minus binds tighter than any infix operator:
exp0b :: { PExp } : exp0b qop exp10b { InfixApp $1 $2 $3 } | dvarexp { $1 } | exp10b { $1 }
exp10b :: { PExp } : 'case' exp 'of' altslist { Case $2 $4 } | '-' fexp { NegApp $2 } | 'do' stmtlist { Do $2 } | 'mdo' stmtlist { MDo $2 } | fexp { $1 }
It has never come up as a problem. Guess that's a point in case for getting rid of unary minus as an operator. :-) Cheers, /Niklas