{-# LANGUAGE RankNTypes #-}
{-# LANGUAGE ScopedTypeVariables #-}


module Polymorphism where


foo :: a -> a -> a
foo :: a -> a -> a
foo = a -> a -> a
forall a. HasCallStack => a
undefined

foo' :: forall a. a -> a -> a
foo' :: a -> a -> a
foo' = a -> a -> a
forall a. HasCallStack => a
undefined

bar :: a -> b -> (a, b)
bar :: a -> b -> (a, b)
bar = a -> b -> (a, b)
forall a. HasCallStack => a
undefined

bar' :: forall a b. a -> b -> (a, b)
bar' :: a -> b -> (a, b)
bar' = a -> b -> (a, b)
forall a. HasCallStack => a
undefined

baz :: a -> (a -> [a -> a] -> b) -> b
baz :: a -> (a -> [a -> a] -> b) -> b
baz = a -> (a -> [a -> a] -> b) -> b
forall a. HasCallStack => a
undefined

baz' :: forall a b. a -> (a -> [a -> a] -> b) -> b
baz' :: a -> (a -> [a -> a] -> b) -> b
baz' = a -> (a -> [a -> a] -> b) -> b
forall a. HasCallStack => a
undefined

quux :: a -> (forall a. a -> a) -> a
quux :: a -> (forall a. a -> a) -> a
quux a
x forall a. a -> a
f = a -> a
forall a. a -> a
f a
x

quux' :: forall a. a -> (forall a. a -> a) -> a
quux' :: a -> (forall a. a -> a) -> a
quux' a
x forall a. a -> a
f = a -> a
forall a. a -> a
f a
x


num :: Num a => a -> a -> a
num :: a -> a -> a
num = a -> a -> a
forall a. HasCallStack => a
undefined

num' :: forall a. Num a => a -> a -> a
num' :: a -> a -> a
num' = a -> a -> a
forall a. HasCallStack => a
undefined

eq :: (Eq a, Eq b) => [a] -> [b] -> (a, b)
eq :: [a] -> [b] -> (a, b)
eq = [a] -> [b] -> (a, b)
forall a. HasCallStack => a
undefined

eq' :: forall a b. (Eq a, Eq b) => [a] -> [b] -> (a, b)
eq' :: [a] -> [b] -> (a, b)
eq' = [a] -> [b] -> (a, b)
forall a. HasCallStack => a
undefined

mon :: Monad m => (a -> m a) -> m a
mon :: (a -> m a) -> m a
mon = (a -> m a) -> m a
forall a. HasCallStack => a
undefined

mon' :: forall m a. Monad m => (a -> m a) -> m a
mon' :: (a -> m a) -> m a
mon' = (a -> m a) -> m a
forall a. HasCallStack => a
undefined


norf :: a -> (forall a. Ord a => a -> a) -> a
norf :: a -> (forall a. Ord a => a -> a) -> a
norf a
x forall a. Ord a => a -> a
f = a
x

norf' :: forall a. a -> (forall a. Ord a => a -> a) -> a
norf' :: a -> (forall a. Ord a => a -> a) -> a
norf' a
x forall a. Ord a => a -> a
f = a
x


plugh :: forall a. a -> a
plugh :: a -> a
plugh a
x = a
x :: a

thud :: forall a b. (a -> b) -> a -> (a, b)
thud :: (a -> b) -> a -> (a, b)
thud a -> b
f a
x =
    (a
x :: a, b
y) :: (a, b)
  where
    y :: b
y = (a -> b
f :: a -> b) a
x :: b