From bba98641e10c71ec9aeb20d508b8905e4a64a143 Mon Sep 17 00:00:00 2001
From: simonpj <unknown>
Date: Mon, 19 Dec 2005 09:48:14 +0000
Subject: [PATCH] [project @ 2005-12-19 09:48:14 by simonpj] Allow trailing
 parens in GADT signatures

---
 ghc/compiler/hsSyn/HsTypes.lhs |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/ghc/compiler/hsSyn/HsTypes.lhs b/ghc/compiler/hsSyn/HsTypes.lhs
index 8ad5940..a3bfbdd 100644
--- a/ghc/compiler/hsSyn/HsTypes.lhs
+++ b/ghc/compiler/hsSyn/HsTypes.lhs
@@ -237,11 +237,14 @@ splitHsInstDeclTy inst_ty
     split_tau tvs cxt (HsParTy (L _ ty))	    = split_tau tvs cxt ty
 
 -- Splits HsType into the (init, last) parts
+-- Breaks up any parens in the result type: 
+--	splitHsFunType (a -> (b -> c)) = ([a,b], c)
 splitHsFunType :: LHsType name -> ([LHsType name], LHsType name)
 splitHsFunType (L l (HsFunTy x y)) = (x:args, res)
   where
   (args, res) = splitHsFunType y
-splitHsFunType other = ([], other)
+splitHsFunType (L _ (HsParTy ty))  = splitHsFunType ty
+splitHsFunType other 	   	   = ([], other)
 \end{code}
 
 
-- 
1.7.10.4