From: simonpj@microsoft.com <unknown>
Date: Fri, 17 Sep 2010 14:01:50 +0000 (+0000)
Subject: Minor refactoring
X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=commitdiff_plain;h=5db036090509ab6acfd327a8ecb51a4abeed105a

Minor refactoring
---

diff --git a/compiler/typecheck/TcSMonad.lhs b/compiler/typecheck/TcSMonad.lhs
index d77b0c2..4965a93 100644
--- a/compiler/typecheck/TcSMonad.lhs
+++ b/compiler/typecheck/TcSMonad.lhs
@@ -283,7 +283,8 @@ isGiven (Given {}) = True
 isGiven _          = False 
 
 isDerived :: CtFlavor -> Bool 
-isDerived ctid =  not $ isGiven ctid || isWanted ctid 
+isDerived (Derived {}) = True
+isDerived _            = False
 
 canRewrite :: CtFlavor -> CtFlavor -> Bool 
 -- canRewrite ctid1 ctid2