maybe

inline fun <Ok> maybe(catch: (Exception) -> Maybe<Ok> = ::emptyFailure, scope: RaiseScope<Any?> = DefaultRaiseScope(), block: RaiseScope<Any?>.() -> Ok): Maybe<Ok>

Runs block inside a RaiseScope and returns a Maybe.

The error type is always mapped to Unit; use raise to short-circuit with an absent value.

Warning: Does not propagate kotlinx.coroutines.CancellationException — use maybeOf in suspend contexts.

// Maybe<String> — success
val m: Maybe<String> = maybe { "hello".uppercase() }

// Maybe<Int> — absent
val n: Maybe<Int> = maybe { raise { Unit } }

catch

Maps a thrown Exception to a Maybe. Returns nz.adjmunro.outcome.members.emptyFailure by default.

block

The block to execute within the scope.