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|
{-# LANGUAGE Haskell2010 #-}
-- | This tests the new MINIMAL pragma present in GHC 7.8
module Minimal
( Foo(..)
, Weird(..)
, NoMins(..)
, FullMin(..)
, PartialMin(ccc)
, EmptyMin(..)
) where
class Foo a where
-- | Any two of these are required...
foo :: a
bar :: a
bat :: a
-- | .. or just this
fooBarBat :: (a,a,a)
{-# MINIMAL (foo, bar) | (bar, bat) | (foo, bat) | fooBarBat #-}
class Weird a where
a :: a
b :: a
c :: a
d :: a
e :: a
f :: a
g :: a
{-# MINIMAL ((a, b), c | (d | (e, (f | g)))) #-}
class NoMins a where
x :: a
y :: a
z :: a
-- | Has a default implementation!
z = x
class FullMin a where
aaa :: a
bbb :: a
class PartialMin a where
ccc :: a
ddd :: a
class EmptyMin a where
eee :: a
fff :: a
eee = fff
fff = undefined
|
