X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Fprelude%2FPrelInfo.lhs;h=88c8bb7089a1dfcd397f3147a10e242839505578;hp=ea5a996e542147c2fe6f305f11409c474fc58a48;hb=8e2c0b76cd426ae794bd0ff046b95c437cef6e4a;hpb=819d8189dddeb05e881bc641f0a6ab2cd14ee1ad

diff --git a/compiler/prelude/PrelInfo.lhs b/compiler/prelude/PrelInfo.lhs
index ea5a996..88c8bb7 100644
--- a/compiler/prelude/PrelInfo.lhs
+++ b/compiler/prelude/PrelInfo.lhs
@@ -69,6 +69,9 @@ Notes about wired in things
 
 \begin{code}
 wiredInThings :: [TyThing]
+-- This list is used only to initialise HscMain.knownKeyNames
+-- to ensure that when you say "Prelude.map" in your source code, you
+-- get a Name with the correct known key
 wiredInThings		
   = concat
     [		-- Wired in TyCons and their implicit Ids