CurryInfo: base-3.4.0 / Data.Maybe.isJust
definition: 
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isJust :: Maybe _ -> Bool isJust (Just _) = True isJust Nothing = False |
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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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Return `True` iff the argument is of the form `Just _`. |
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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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{({Just}) |-> {True} || ({Nothing}) |-> {False}}
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name:
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isJust |
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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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Prelude.Maybe a -> Prelude.Bool |
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solution-complete:
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operationally complete operation |
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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 |