CurryInfo: base-3.4.0 / Prelude.ap
definition: 
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ap :: Monad m => m (a -> b) -> m a -> m b ap m1 m2 = do x1 <- m1 x2 <- m2 return (x1 x2) |
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demand:
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argument 1 |
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deterministic:
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deterministic operation |
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documentation:
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Promotes function application to a monad.
For instance,
> pure not `ap` Just True
Just False
This is useful to promote application of functions with larger arities
to a monad, as 'liftM2' for arity `2`. For instance,
> pure (\x y z -> x + y * z) `ap` Just 7 `ap` Just 5 `ap` Just 7
Just 42
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failfree:
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(_, _, _) |
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indeterministic:
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referentially transparent operation |
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infix:
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no fixity defined |
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iotype:
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{(_,_,_) |-> _}
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name:
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ap |
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precedence:
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no precedence defined |
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result-values:
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_ |
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signature:
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Monad a => a (b -> c) -> a b -> a c |
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solution-complete:
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operation might suspend on free variables |
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terminating:
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yes |
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totally-defined:
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reducible on all ground data terms |