X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Ftypecheck%2FTcRnTypes.lhs;h=9a08e9a6535d65661922adc6ecf5a5e1523ccd82;hb=382fce427106197b5e7dec81165af20329ac6cc2;hp=b624a14a65340487d8efe04139b06df2b0f73a7e;hpb=ecd655aaaa4ae495933415ad1ff6f6132ff3967f;p=ghc-hetmet.git

diff --git a/compiler/typecheck/TcRnTypes.lhs b/compiler/typecheck/TcRnTypes.lhs
index b624a14..9a08e9a 100644
--- a/compiler/typecheck/TcRnTypes.lhs
+++ b/compiler/typecheck/TcRnTypes.lhs
@@ -598,15 +598,20 @@ data Inst
   | ImplicInst {	-- An implication constraint
 			-- forall tvs. (reft, given) => wanted
 	tci_name   :: Name,
-	tci_tyvars :: [TcTyVar],    -- Includes coercion variables
+	tci_tyvars :: [TcTyVar],    -- Quantified type variables
+				    -- Includes coercion variables
 				    --   mentioned in tci_reft
 	tci_reft   :: Refinement,
 	tci_given  :: [Inst],	    -- Only Dicts
 				    --   (no Methods, LitInsts, ImplicInsts)
 	tci_wanted :: [Inst],	    -- Only Dicts and ImplicInsts
 				    --   (no Methods or LitInsts)
+
 	tci_loc    :: InstLoc
     }
+	-- NB: the tci_given are not necessarily rigid,
+	--     although they will be if the tci_reft is non-trivial
+	-- NB: the tci_reft is already applied to tci_given and tci_wanted
 
   | Method {
 	tci_id :: TcId,		-- The Id for the Inst