CurryInfo: base-3.4.0 / Data.Maybe.listToMaybe
definition: 
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listToMaybe :: [a] -> Maybe a listToMaybe [] = Nothing listToMaybe (a : _) = Just a |
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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 `Nothing` on an empty list or `Just x` where `x` is the first list element. |
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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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{({[]}) |-> {Nothing} || ({:}) |-> {Just}}
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name:
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listToMaybe |
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precedence:
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no precedence defined |
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result-values:
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{Just,Nothing}
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signature:
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[a] -> Prelude.Maybe a |
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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 |