| definition: |
isDefined :: a -> Bool
isDefined x = hasValue (someSearchTree x)
where hasValue y = case y of Value _ -> True
Fail _ -> False
Or t1 t2 -> hasValue t1 || hasValue t2
|
| demand: |
no demanded arguments |
| deterministic: |
deterministic operation |
| documentation: |
--- Returns True iff the argument is defined, i.e., has a value. |
| failfree: |
_ |
| indeterministic: |
referentially transparent operation |
| infix: |
no fixity defined |
| iotype: |
{(_) |-> _}
|
| name: |
isDefined |
| precedence: |
no precedence defined |
| result-values: |
_ |
| signature: |
a -> Prelude.Bool |
| solution-complete: |
operation might suspend on free variables |
| terminating: |
yes |
| totally-defined: |
reducible on all ground data terms |