Haddock support for bundled pattern synonyms (#627)

* Haddock support for bundled pattern synonyms

* Add fixities to bundled pattern synonyms

* Add bundled pattern synonyms to the synopsis

* Store bundled pattern fixities in expItemFixities

* Add test for bundled pattern synonyms

* Stop threading fixities

* Include bundled pattern synonyms for re-exported data types

Sadly, fixity information isn't found for re-exported data types

* Support for pattern synonyms

* Modify tests after #631

* Test some reexport variations

* Also lookup bundled pattern synonyms from `InstalledInterface`s

* Check isExported for bundled pattern synonyms

* Pattern synonym is exported check

* Always look for pattern synonyms in the current module

Another overlooked cornercase

* Account for types named twice in export lists

Also introduce a fast function for nubbing on a `Name` and use it
throughout the code base.

* correct fixities for reexported pattern synonyms

* Fuse concatMap and map

* Remove obsolete import

* Add pattern synonyms to visible exports

* Fix test

* Remove corner case

1 files changed, 10 insertions, 0 deletions

diff --git a/html-test/src/BundledPatterns2.hs b/html-test/src/BundledPatterns2.hs
new file mode 100644
index 00000000..5e9a83a7
--- /dev/null
+++ b/html-test/src/BundledPatterns2.hs
@@ -0,0 +1,10 @@
+{-# LANGUAGE DataKinds, GADTs, KindSignatures, PatternSynonyms, TypeOperators,
+             ViewPatterns #-}
+module BundledPatterns2 (Vec((:>), Empty), RTree(..)) where
+
+import GHC.TypeLits
+
+import BundledPatterns
+
+pattern Empty :: Vec 0 a
+pattern Empty <- Nil