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fun with symbols

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Nothing at all on hackage is using <&&> or <||>.

(Also, <&&> should short-circuit on failure.)
This commit is contained in:
Joey Hess 2012-03-17 00:22:05 -04:00
parent d6624b6c79
commit a362c46b70
4 changed files with 15 additions and 20 deletions
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8
Utility/Matcher.hs
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@ -78,8 +78,8 @@ match a m v = go m
where
go MAny = True
go (MAnd m1 m2) = go m1 && go m2
go (MOr m1 m2) = go m1 || go m2
go (MNot m1) = not (go m1)
go (MOr m1 m2) = go m1 || go m2
go (MNot m1) = not $ go m1
go (MOp o) = a o v
{- Runs a monadic Matcher, where Operations are actions in the monad. -}
@ -87,8 +87,8 @@ matchM :: Monad m => Matcher (v -> m Bool) -> v -> m Bool
matchM m v = go m
where
go MAny = return True
go (MAnd m1 m2) = andM (go m1) (go m2)
go (MOr m1 m2) = orM (go m1) (go m2)
go (MAnd m1 m2) = go m1 <&&> go m2
go (MOr m1 m2) = go m1 <||> go m2
go (MNot m1) = liftM not (go m1)
go (MOp o) = o v