29 Aug
2001
29 Aug
'01
10:37 a.m.
(Moved to haskell-cafe) Syntacticly, -x parses as 0-x. That is, there is only one - operator and the "0" is filled in when it is encountered in a unary position. Thus -3 ^ 2 translates to 0 - 3 ^ 2 There were many arguments on either side of this debate but I would have to dig deep into the archives to remember what they were. This is certainly a potential source of confusion! Anyway, experienced Haskellers always add parens around unary minus to avoid any ambiguity: (-3) ^ 2 John