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  1. orElse :: Semigroup e => ValidationRule e a -> ValidationRule e a -> ValidationRule e a

    valida-base Valida.Combinators

    Build a rule that succeeds if either of the given rules succeed. If both fail, the errors are combined. 

    rule1 `orElse` (rule2 `orElse` rule3) = (rule1 `orElse` rule2) `orElse` rule3

    falseRule e `orElse` rule = rule

    rule `orElse` falseRule e = rule

    Examples

    >>> let rule = failureIf (>0) "Positive" `orElse` failureIf even "Even"

>>> runValidator (validate rule) 5
Success 5

>>> runValidator (validate rule) 4
Failure ("Positive" :| ["Even"])

>>> runValidator (validate rule) 0
Success 0

>>> runValidator (validate rule) (-1)
Success (-1)

  2. orElseSTM :: STM a -> STM a -> STM a

    classy-prelude ClassyPrelude

    Synonym for orElse.

  3. orElseSTM :: STM a -> STM a -> STM a

    classy-prelude-yesod ClassyPrelude.Yesod

    Synonym for orElse.

  4. orElseSTM :: STM a -> STM a -> STM a

    termonad Termonad.Prelude

    Synonym for orElse.

  5. SOrElse :: ModelSTM n a -> ModelSTM n a -> (a -> STMAction n) -> STMAction n

    dejafu Test.DejaFu.Conc.Internal.STM

    No documentation available.

  6. TOrElse :: [TAction] -> Maybe [TAction] -> TAction

    dejafu Test.DejaFu.Types

    Execute a transaction. If the transaction aborts by calling retry, execute the other transaction.

  7. casesOrElse :: OperatorContext c => [(Predicate c, Record c a)] -> Record c a -> Record c a

    relational-query Database.Relational.Arrow

    Same as caseSearch, but you can write like list casesOrElse clause.

  8. casesOrElse' :: OperatorContext c => (Record c a, [(Record c a, Record c b)]) -> Record c b -> Record c b

    relational-query Database.Relational.Arrow

    Uncurry version of case', and you can write like ... casesOrElse' clause.

  9. casesOrElse :: OperatorContext c => [(Predicate c, Record c a)] -> Record c a -> Record c a

    relational-query Database.Relational.Projectable

    Same as caseSearch, but you can write like list casesOrElse clause.

  10. casesOrElse' :: OperatorContext c => (Record c a, [(Record c a, Record c b)]) -> Record c b -> Record c b

    relational-query Database.Relational.Projectable

    Uncurry version of case', and you can write like ... casesOrElse' clause.

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