X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2FhsSyn%2FHsPat.lhs;h=7fb5f725334fdb03e2b45c64a93a5b86e9e6edcf;hp=740bfa71727d6059ae948ae0ea6bc3fdb2725de4;hb=86add45dbfb6f962b65e371143dd467ae783f9e7;hpb=fdf8656855d26105ff36bdd24d41827b05037b91

diff --git a/compiler/hsSyn/HsPat.lhs b/compiler/hsSyn/HsPat.lhs
index 740bfa7..7fb5f72 100644
--- a/compiler/hsSyn/HsPat.lhs
+++ b/compiler/hsSyn/HsPat.lhs
@@ -122,7 +122,9 @@ data Pat id
   | LitPat	    HsLit		-- Used for *non-overloaded* literal patterns:
 					-- Int#, Char#, Int, Char, String, etc.
 
-  | NPat	    (HsOverLit id)		-- ALWAYS positive
+  | NPat		-- Used for all overloaded literals, 
+    			-- including overloaded strings with -XOverloadedStrings
+                    (HsOverLit id)		-- ALWAYS positive
 		    (Maybe (SyntaxExpr id))	-- Just (Name of 'negate') for negative
 						-- patterns, Nothing otherwise
 		    (SyntaxExpr id)		-- Equality checker, of type t->t->Bool
@@ -132,12 +134,6 @@ data Pat id
 		    (SyntaxExpr id)	-- (>=) function, of type t->t->Bool
 		    (SyntaxExpr id)	-- Name of '-' (see RnEnv.lookupSyntaxName)
 
-	------------ Generics ---------------
-  | TypePat	    (LHsType id)	-- Type pattern for generic definitions
-                                        -- e.g  f{| a+b |} = ...
-                                        -- These show up only in class declarations,
-                                        -- and should be a top-level pattern
-
 	------------ Pattern type signatures ---------------
   | SigPatIn	    (LPat id)		-- Pattern with a type signature
 		    (LHsType id)
@@ -281,7 +277,6 @@ pprPat (NPat l Nothing  _)  = ppr l
 pprPat (NPat l (Just _) _)  = char '-' <> ppr l
 pprPat (NPlusKPat n k _ _)  = hcat [ppr n, char '+', ppr k]
 pprPat (QuasiQuotePat qq)   = ppr qq
-pprPat (TypePat ty)	    = ptext (sLit "{|") <> ppr ty <> ptext (sLit "|}")
 pprPat (CoPat co pat _)	    = pprHsWrapper (ppr pat) co
 pprPat (SigPatIn pat ty)    = ppr pat <+> dcolon <+> ppr ty
 pprPat (SigPatOut pat ty)   = ppr pat <+> dcolon <+> ppr ty
@@ -439,7 +434,6 @@ isIrrefutableHsPat pat
 
     go1 (QuasiQuotePat {}) = urk pat	-- Gotten rid of by renamer, before
 					-- isIrrefutablePat is called
-    go1 (TypePat {})       = urk pat
 
     urk pat = pprPanic "isIrrefutableHsPat:" (ppr pat)
 
@@ -463,7 +457,6 @@ hsPatNeedsParens (LitPat {})   	     = False
 hsPatNeedsParens (NPat {})	     = False
 hsPatNeedsParens (NPlusKPat {})      = True
 hsPatNeedsParens (QuasiQuotePat {})  = True
-hsPatNeedsParens (TypePat {})        = False
 
 conPatNeedsParens :: HsConDetails a b -> Bool
 conPatNeedsParens (PrefixCon args) = not (null args)