CurryInfo: base-3.4.0 / Control.Search.Unsafe.isFail
definition: 
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isFail :: a -> Bool
isFail x = case oneValue x of Nothing -> True
Just _ -> False
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demand:
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no demanded arguments |
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deterministic:
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deterministic operation |
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documentation:
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Does the computation of the argument to a value fail? Conceptually, the argument is evaluated on a copy, i.e., even if the computation does not fail, it has not been evaluated. |
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failfree:
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_ |
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indeterministic:
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might be indeterministic |
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infix:
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no fixity defined |
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iotype:
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{(_) |-> {False,True}}
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name:
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isFail |
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precedence:
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no precedence defined |
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result-values:
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{False,True}
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signature:
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a -> Prelude.Bool |
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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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possibly non-reducible on same data term |