Output pattern synonyms in Hoogle backend (#947)

* Output pattern synonyms in Hoogle backend

We were previously weren't outputting _any_ pattern synonyms, bundled or
not. Now, we output both.

Fixes #946.

* Update changelog

2 files changed, 35 insertions, 0 deletions

diff --git a/hoogle-test/ref/Bug946/test.txt b/hoogle-test/ref/Bug946/test.txt
new file mode 100644
index 00000000..ff63a766
--- /dev/null
+++ b/hoogle-test/ref/Bug946/test.txt
@@ -0,0 +1,19 @@
+-- Hoogle documentation, generated by Haddock
+-- See Hoogle, http://www.haskell.org/hoogle/
+
+@package test
+@version 0.0.0
+
+module Bug946
+
+-- | A wrapper around <a>Int</a>
+data AnInt
+
+-- | some <a>Int</a>
+AnInt :: Int -> AnInt
+
+-- | The <a>Int</a> 0
+pattern Zero :: AnInt
+
+-- | The double 2.5
+pattern TwoPointFive :: Double
diff --git a/hoogle-test/src/Bug946/Bug946.hs b/hoogle-test/src/Bug946/Bug946.hs
new file mode 100644
index 00000000..606b5ac4
--- /dev/null
+++ b/hoogle-test/src/Bug946/Bug946.hs
@@ -0,0 +1,16 @@
+{-# LANGUAGE PatternSynonyms #-}
+module Bug946 (
+  AnInt(AnInt, Zero),
+  pattern TwoPointFive,
+) where
+
+-- | A wrapper around 'Int'
+data AnInt = AnInt Int -- ^ some 'Int'
+
+-- | The 'Int' 0
+pattern Zero :: AnInt
+pattern Zero = AnInt 0
+
+-- | The double 2.5
+pattern TwoPointFive :: Double
+pattern TwoPointFive = 2.5