Changed PatternGuard usage to ViewPattern usage

1 files changed, 9 insertions, 8 deletions

diff --git a/KeyRing.hs b/KeyRing.hs
index 4e6c512..62e46a8 100644
--- a/KeyRing.hs
+++ b/KeyRing.hs
@@ -4,6 +4,7 @@
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE DeriveFunctor #-}
 {-# LANGUAGE DoAndIfThenElse #-}
+{-# LANGUAGE NoPatternGuards #-}
 module KeyRing
     ( runKeyRing
     , StreamInfo(..)
@@ -186,8 +187,8 @@ data StreamInfo = StreamInfo
 
 
 isMutable :: StreamInfo -> Bool
-isMutable stream | KF_None <- fill stream = False
-isMutable _                               = True
+isMutable (fill -> KF_None) = False
+isMutable _                 = True
 
 isring :: FileType -> Bool
 isring (KeyRingFile {}) = True
@@ -900,9 +901,9 @@ writeHostsFiles
      -> IO [(FilePath, KikiReportAction)]
 writeHostsFiles krd secring pubring (hostdbs0,hostdbs,u1,gpgnames,outgoing_names) = do
     let hns = files isMutableHosts
-        isMutableHosts stream | KF_None <- fill stream = False
-        isMutableHosts stream | Hosts <- typ stream    = True
-        isMutableHosts _                               = False
+        isMutableHosts (fill -> KF_None) = False
+        isMutableHosts (typ -> Hosts)    = True
+        isMutableHosts _                 = False
         files istyp = do
             (f,stream) <- Map.toList (kFiles krd)
             guard (istyp stream)
@@ -1224,9 +1225,9 @@ writeWalletKeys :: KeyRingOperation -> KeyDB -> Maybe Packet -> IO (KikiConditio
 writeWalletKeys krd db wk = do
     let cs = db `coinKeysOwnedBy` wk
     -- export wallet keys
-        isMutableWallet stream | KF_None <- fill stream      = False
-        isMutableWallet stream | WalletFile {} <- typ stream = True
-        isMutableWallet _                                    = False
+        isMutableWallet (fill -> KF_None)      = False
+        isMutableWallet (typ -> WalletFile {}) = True
+        isMutableWallet _                      = False
         files pred = do
             (f,stream) <- Map.toList (kFiles krd)
             guard (pred stream)