fold

suspend fun <R, A, B> Effect<R, A>.fold(error: suspend (error: Throwable) -> B, recover: suspend (raised: R) -> B, transform: suspend (value: A) -> B): B

invoke the Effect and fold the result:

success transform result of A to a value of B.
raised recover from raised value of R to a value of B.
exception error from Throwable by transforming value into B.

This method should never be wrapped in try/catch as it will not throw any unexpected errors, it will only result in CancellationException, or fatal exceptions such as OutOfMemoryError.

suspend fun <R, A, B> Effect<R, A>.fold(recover: suspend (raised: R) -> B, transform: suspend (value: A) -> B): B

inline fun <R, A, B> EagerEffect<R, A>.fold(error: (error: Throwable) -> B, recover: (raised: R) -> B, transform: (value: A) -> B): B

inline fun <R, A, B> EagerEffect<R, A>.fold(recover: (R) -> B, transform: (A) -> B): B

@JvmName(name = "_foldOrThrow")

inline fun <R, A, B> fold(program: Raise<R>.() -> A, recover: (raised: R) -> B, transform: (value: A) -> B): B

@JvmName(name = "_fold")

inline fun <R, A, B> fold(program: Raise<R>.() -> A, error: (error: Throwable) -> B, recover: (raised: R) -> B, transform: (value: A) -> B): B