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definition:
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choose :: Eq a => Values a -> (a, Values a)
#ifdef __KICS2__
choose (Values vs) = (x, Values xs)
#else
choose (Values _ vs) =
(x, Values (if null xs then Nothing else Just (head xs)) xs)
#endif
where x = foldr1 (?) vs
xs = delete x vs
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demand:
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argument 2
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deterministic:
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possibly non-deterministic operation
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documentation:
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--- Chooses (non-deterministically) some value in a multiset of values
--- and returns the chosen value and the remaining multiset of values.
--- Thus, if we consider the operation `chooseValue` defined by
---
--- chooseValue x = fst (choose x)
---
--- then `(set1 chooseValue)` is the identity on value sets, i.e.,
--- `(set1 chooseValue s)` contains the same elements as the
--- value set `s`.
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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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{(_,{Values}) |-> {(,)}}
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name:
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choose
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precedence:
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no precedence defined
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result-values:
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{(,)}
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signature:
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Prelude.Eq a => Values a -> (a, Values 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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yes
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totally-defined:
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possibly non-reducible on same data term
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