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| author | Spencer Janssen <sjanssen@cse.unl.edu> | 2007-09-20 22:57:11 +0200 |
|---|---|---|
| committer | Spencer Janssen <sjanssen@cse.unl.edu> | 2007-09-20 22:57:11 +0200 |
| commit | c3641121d9fd1d091882002a908f0661221b39b2 (patch) | |
| tree | 696b3927c5517538e76e0e916521383043dc1afa | |
| parent | 71a7d6bd1426c61e5ecb3556b2d6d10bea488128 (diff) | |
| download | metatile-c3641121d9fd1d091882002a908f0661221b39b2.tar metatile-c3641121d9fd1d091882002a908f0661221b39b2.zip | |
Use derived Show and Read instances for Mirror
darcs-hash:20070920205711-a5988-822fbb9bc11937cccbc74252d6be2452cebedcd4
| -rw-r--r-- | Operations.hs | 8 |
1 files changed, 1 insertions, 7 deletions
diff --git a/Operations.hs b/Operations.hs index 1cb0201..d18bd99 100644 --- a/Operations.hs +++ b/Operations.hs @@ -375,13 +375,7 @@ mirrorRect :: Rectangle -> Rectangle mirrorRect (Rectangle rx ry rw rh) = (Rectangle ry rx rh rw) -- | Mirror a layout, compute its 90 degree rotated form. -data Mirror l a = Layout l a => Mirror (l a) -instance Layout l a => Show (Mirror l a) where - show (Mirror l) = "Mirror "++show l -instance Layout l a => Read (Mirror l a) where - readsPrec _ s = case take (length "Mirror ") s of - "Mirror " -> map (\ (l,s') -> (Mirror l,s')) $ reads $ drop (length "Mirror ") s - _ -> [] +data Mirror l a = Mirror (l a) deriving (Show, Read) instance Layout l a => Layout (Mirror l) a where doLayout (Mirror l) r s = do (wrs, ml') <- doLayout l (mirrorRect r) s |