[project @ 2005-07-26 08:16:24 by simonpj]

[ghc-hetmet.git] / ghc / compiler / types / TyCon.lhs

diff --git a/ghc/compiler/types/TyCon.lhs b/ghc/compiler/types/TyCon.lhs
index 7d42e1a..3bec98d 100644 (file)
--- a/ghc/compiler/types/TyCon.lhs
+++ b/ghc/compiler/types/TyCon.lhs
@@ -178,6 +178,7 @@ data AlgTyConRhs
                        -- INVARIANT: Kept in order of increasing tag
                        --            (see the tag assignment in DataCon.mkDataCon)
        Bool            -- Cached: True <=> an enumeration type
+                       --         Includes data types with no constructors.
 
   | NewTyCon           -- Newtypes always have exactly one constructor
        DataCon         -- The unique constructor; it has no existentials