From 6e0fe19f52445f0a231073b3eff116924d631588 Mon Sep 17 00:00:00 2001 From: Łukasz Hanuszczak Date: Mon, 13 Jul 2015 19:26:45 +0200 Subject: Add basic HTML test case for checking instance specialization. --- html-test/src/Instances.hs | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 html-test/src/Instances.hs (limited to 'html-test') diff --git a/html-test/src/Instances.hs b/html-test/src/Instances.hs new file mode 100644 index 00000000..d0d68dc3 --- /dev/null +++ b/html-test/src/Instances.hs @@ -0,0 +1,36 @@ +{-# LANGUAGE MultiParamTypeClasses #-} +{-# LANGUAGE FlexibleInstances #-} +{-# LANGUAGE FlexibleContexts #-} + + +module Instances where + + +class Foo f where + + foo :: f Int -> a -> f a + foo' :: f (f a) -> Int -> f (f Int) + + foo = undefined + foo' = undefined + +instance Foo Maybe +instance Foo [] +instance (Eq a, Foo f) => Foo ((,) (f a)) +instance Foo (Either a) +instance Foo ((,,) a a) + + +class Foo f => Bar f a where + + bar :: f a -> f Bool -> a + bar' :: f (f a) -> f (f (f b)) + + bar = undefined + bar' = undefined + +instance Bar Maybe Bool +instance Bar Maybe [a] +instance Bar [] (a, a) +instance Foo f => Bar (Either a) (f a) +instance Foo ((,,) a b) => Bar ((,,) a b) (a, b, a) -- cgit v1.2.3