From: Simon Peyton Jones <simonpj@microsoft.com>
Date: Fri, 6 May 2011 14:34:09 +0000 (+0100)
Subject: Use eqSpecPreds
X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=commitdiff_plain;h=ee62a1b6847e42f76383b2e70003f2feb9e8435c

Use eqSpecPreds
---

diff --git a/compiler/typecheck/TcPat.lhs b/compiler/typecheck/TcPat.lhs
index 2501225..c860bfe 100644
--- a/compiler/typecheck/TcPat.lhs
+++ b/compiler/typecheck/TcPat.lhs
@@ -695,8 +695,7 @@ tcConPat penv (L con_span con_name) pat_ty arg_pats thing_inside
 
 	  else do   -- The general case, with existential, 
                     -- and local equality constraints
-	{ let eq_preds = [mkEqPred (mkTyVarTy tv, ty) | (tv, ty) <- eq_spec]
-	      theta'   = substTheta tenv (eq_preds ++ theta)
+	{ let theta'   = substTheta tenv (eqSpecPreds eq_spec ++ theta)
                            -- order is *important* as we generate the list of
                            -- dictionary binders from theta'
 	      no_equalities = not (any isEqPred theta')