[Haskell-cafe] Re: Unary Minus

[Roel van Dijk]

On Mon, Apr 6, 2009 at 12:04 PM, Benjamin L.Russell
<DekuDekuplex at yahoo.com> wrote:
> Interesting.  How is this hack implemented?

This seems to be the relevant grammar:
  lexp6 -> - exp7
  lpat6 -> - (integer | float)        (negative literal)

The '6's and the '7' are superscripts.
Perhaps the hack is in the precedence of the expression in which an
unary minus is allowed.