export constructors for GHC.Generics sum/product

all_stack.sh

@@ -22,3 +22,9 @@ stack build --resolver lts-7.13
 stack build --resolver lts-7.14
 stack build --resolver lts-7.15
 stack build --resolver lts-7.16
+stack build --resolver lts-8.0
+stack build --resolver lts-8.1
+stack build --resolver lts-8.2
+stack build --resolver lts-8.3
+stack build --resolver lts-8.4
+stack build --resolver lts-8.5

src/Protolude.hs

@@ -373,9 +373,9 @@ import GHC.Generics as X (
   , D1
   , C1
   , S1
-  , (:+:)
-  , (:*:)
-  , (:.:)
+  , (:+:)(..)
+  , (:*:)(..)
+  , (:.:)(..)
   , Rec0
   , Constructor(..)
   , Datatype(..)