- *wrapper*, called C, whose type is exactly what it looks like
- in the source program. It is an ordinary function,
- and it gets a top-level binding like any other function
+ data T = T !Int ![Int]
+
+Using the strictness annotations, GHC will represent this as
+
+ data T = T Int# [Int]
+
+That is, the Int has been unboxed. Furthermore, the Haskell source construction
+
+ T e1 e2
+
+is translated to
+
+ case e1 of { I# x ->
+ case e2 of { r ->
+ T x r }}
+
+That is, the first argument is unboxed, and the second is evaluated. Finally,
+pattern matching is translated too:
+
+ case e of { T a b -> ... }
+
+becomes
+
+ case e of { T a' b -> let a = I# a' in ... }
+
+To keep ourselves sane, we name the different versions of the data constructor
+differently, as follows.
+
+
+Note [Data Constructor Naming]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Each data constructor C has two, and possibly three, Names associated with it: