From: simonmar <unknown>
Date: Thu, 6 Oct 2005 10:38:54 +0000 (+0000)
Subject: [project @ 2005-10-06 10:38:54 by simonmar]
X-Git-Tag: Initial_conversion_from_CVS_complete~190
X-Git-Url: http://git.megacz.com/?a=commitdiff_plain;h=9008f5e5149514f61edf0bc9498985e58595cf40;p=ghc-hetmet.git

[project @ 2005-10-06 10:38:54 by simonmar]
add splitHsFunType

From: Autrijus Tang <autrijus@autrijus.org>
---

diff --git a/ghc/compiler/hsSyn/HsTypes.lhs b/ghc/compiler/hsSyn/HsTypes.lhs
index 3089050..8ad5940 100644
--- a/ghc/compiler/hsSyn/HsTypes.lhs
+++ b/ghc/compiler/hsSyn/HsTypes.lhs
@@ -17,7 +17,7 @@ module HsTypes (
 	mkExplicitHsForAllTy, mkImplicitHsForAllTy, 
 	hsTyVarName, hsTyVarNames, replaceTyVarName,
 	hsLTyVarName, hsLTyVarNames, hsLTyVarLocName, hsLTyVarLocNames,
-	splitHsInstDeclTy,
+	splitHsInstDeclTy, splitHsFunType,
 	
 	-- Type place holder
 	PostTcType, placeHolderType,
@@ -235,6 +235,13 @@ splitHsInstDeclTy inst_ty
   where
     split_tau tvs cxt (HsPredTy (HsClassP cls tys)) = (tvs, cxt, cls, tys)
     split_tau tvs cxt (HsParTy (L _ ty))	    = split_tau tvs cxt ty
+
+-- Splits HsType into the (init, last) parts
+splitHsFunType :: LHsType name -> ([LHsType name], LHsType name)
+splitHsFunType (L l (HsFunTy x y)) = (x:args, res)
+  where
+  (args, res) = splitHsFunType y
+splitHsFunType other = ([], other)
 \end{code}