| Safe Haskell | None |
|---|---|
| Language | Haskell98 |
Shelley.Spec.Ledger.STS.Epoch
Synopsis
- data EPOCH era
- data EpochPredicateFailure era
- = PoolReapFailure (PredicateFailure (POOLREAP era))
- | SnapFailure (PredicateFailure (SNAP era))
- | NewPpFailure (PredicateFailure (NEWPP era))
- type family PredicateFailure a = (b ∷ Type) | b → a
Documentation
Instances
data EpochPredicateFailure era Source #
Constructors
| PoolReapFailure (PredicateFailure (POOLREAP era)) | |
| SnapFailure (PredicateFailure (SNAP era)) | |
| NewPpFailure (PredicateFailure (NEWPP era)) |
Instances
type family PredicateFailure a = (b ∷ Type) | b → a Source #
Descriptive type for the possible failures which might cause a transition to fail.
As a convention, PredicateFailures which are "structural" (meaning that
they are not "throwable" in practice, and are used to pass control from
one transition rule to another) are prefixed with S_.
Structural PredicateFailures represent conditions between rules where
the disjunction of all rules' preconditions is equal to True. That is,
either one rule will throw a structural PredicateFailure and the other
will succeed, or vice-versa.