Wiring in tuples notewip/occname

This should probably just be folded in to the note above

1 files changed, 10 insertions, 0 deletions

diff --git a/compiler/iface/IfaceEnv.hs b/compiler/iface/IfaceEnv.hs
index b70c8e922f..d4aa03b8ca 100644
--- a/compiler/iface/IfaceEnv.hs
+++ b/compiler/iface/IfaceEnv.hs
@@ -202,6 +202,16 @@ However, there are two reasons why we might look up an Orig RdrName:
     go this route (Trac #8954).
 -}
 
+{-
+Note [Wiring in tuples]
+~~~~~~~~~~~~~~~~~~~~~~~
+
+The wiring-in of the tuple types is a bit tricky. The reason is that there are
+very many of them and we consequently want to avoid cluttering the name cache
+with them unnecessarily. For this reason we specially encode tuple Names in
+interface files,
+-}
+
 lookupOrigNameCache :: OrigNameCache -> Module -> OccName -> Maybe Name
 lookupOrigNameCache nc mod occ
   | mod == gHC_TYPES