[Haskell-cafe] What puts False before True?

[Stefan Holdermans]

Brandon,

> If I'm reading the reports correctly, the Ord instance was
> actually added in the Haskell 1.1 standard, by changing the
> definition of Bool from
>
> data Bool = True | False
>
> to
>
> data Bool = True | False deriving (Eq, Ord, Ix, Enum, Text, Binary)

It's

   data Bool = False | True

> It seems like we actually get that order because deriving Ord makes
> constructors earlier in the definition compare greater than later
> constructors, and nobody was bothered by that ordering.

It's the other way around:

   data T = Less | More deriving (Eq, Ord)

gives you

   *Main> Less < More
   True

Cheers,

   Stefan