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| author | Spencer Janssen <sjanssen@cse.unl.edu> | 2007-07-24 17:23:40 +0200 |
|---|---|---|
| committer | Spencer Janssen <sjanssen@cse.unl.edu> | 2007-07-24 17:23:40 +0200 |
| commit | 224d9ccc73b34db49ce8792c0e6c5e68a04a8416 (patch) | |
| tree | 0a0b046b65e981b7ac6c0fa2f62da3e8dec76568 /StackSet.hs | |
| parent | cec3703f08cefe8271709a783516efff72bb13e4 (diff) | |
| download | metatile-224d9ccc73b34db49ce8792c0e6c5e68a04a8416.tar metatile-224d9ccc73b34db49ce8792c0e6c5e68a04a8416.zip | |
shift: use guards instead of if
darcs-hash:20070724152340-a5988-dec59fcb145282845349ec5baf700b62a25ac116
Diffstat (limited to 'StackSet.hs')
| -rw-r--r-- | StackSet.hs | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/StackSet.hs b/StackSet.hs index 3951ec2..e6b2996 100644 --- a/StackSet.hs +++ b/StackSet.hs @@ -474,7 +474,7 @@ swapMaster = modify' $ \c -> case c of -- element on the current stack, the original stackSet is returned. -- shift :: (Ord a, Eq s, Eq i) => i -> StackSet i a s sd -> StackSet i a s sd -shift n s = if n `tagMember` s && n /= curtag - then maybe s go (peek s) else s +shift n s | n `tagMember` s && n /= curtag = maybe s go (peek s) + | otherwise = s where go w = view curtag . insertUp w . view n . delete w $ s curtag = tag (workspace (current s)) |