CurryInfo: ertools-3.0.0 / Database.ERD.Generic.readDatabaseKey
definition: 
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readDatabaseKey :: String -> (Key -> enkey) -> String -> Maybe enkey
readDatabaseKey en toenkey s =
let (ens,ks) = splitAt (length en) s
in if ens==en && all isDigit ks then Just (toenkey (read ks))
else Nothing
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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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Transforms a string into a key for an entity name. Nothing is returned if the string does not represent a reasonable key. |
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failfree:
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<FAILING> |
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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,Nothing}}
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name:
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readDatabaseKey |
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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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String -> (Prelude.Int -> a) -> String -> Prelude.Maybe a |
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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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possibly non-terminating |
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totally-defined:
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possibly non-reducible on same data term |