From e809bf548d6eb03d02e68ec274b74099e933e7d5 Mon Sep 17 00:00:00 2001
From: Bas van Dijk <v.dijk.bas@gmail.com>
Date: Fri, 30 Sep 2011 13:47:31 +0000
Subject: [PATCH] Added RULES that translates "unsafeFromForeignPtr fp 0 n" to
"unsafeFromForeignPtr0 fp n"
---
Data/Vector/Storable.hs | 5 +++++
Data/Vector/Storable/Mutable.hs | 5 +++++
2 files changed, 10 insertions(+)
diff --git a/Data/Vector/Storable.hs b/Data/Vector/Storable.hs
index 65af6d7..ebb68e1 100644
--- a/Data/Vector/Storable.hs
+++ b/Data/Vector/Storable.hs
@@ -1375,6 +1375,11 @@ unsafeFromForeignPtr fp i n = unsafeFromForeignPtr0 fp' n
where
fp' = updPtr (`advancePtr` i) fp
+{-# RULES
+"unsafeFromForeignPtr fp 0 n -> unsafeFromForeignPtr0 fp n " forall fp n.
+ unsafeFromForeignPtr fp 0 n = unsafeFromForeignPtr0 fp n
+ #-}
+
-- | /O(1)/ Create a vector from a 'ForeignPtr' and a length.
--
-- It is assumed the pointer points directly to the data (no offset).
diff --git a/Data/Vector/Storable/Mutable.hs b/Data/Vector/Storable/Mutable.hs
index 8c3e284..7b87986 100644
--- a/Data/Vector/Storable/Mutable.hs
+++ b/Data/Vector/Storable/Mutable.hs
@@ -403,6 +403,11 @@ unsafeFromForeignPtr fp i n = unsafeFromForeignPtr0 fp' n
where
fp' = updPtr (`advancePtr` i) fp
+{-# RULES
+"unsafeFromForeignPtr fp 0 n -> unsafeFromForeignPtr0 fp n " forall fp n.
+ unsafeFromForeignPtr fp 0 n = unsafeFromForeignPtr0 fp n
+ #-}
+
-- | /O(1)/ Create a mutable vector from a 'ForeignPtr' and a length.
--
-- It is assumed the pointer points directly to the data (no offset).
--
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