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SuspendExact #34

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SuspendExact #34

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25 changes: 25 additions & 0 deletions src/commonMain/kotlin/arrow/exact/SuspendExact.kt
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Original file line number Diff line number Diff line change
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package arrow.exact

import arrow.core.Either
import arrow.core.raise.Raise
import arrow.core.raise.either

//TODO: add documentation
//TODO: fix coding style (see #33)

public typealias SuspendExact<A, R> = SuspendExactEither<ExactError, A, R>

public interface SuspendExactEither<out Error: Any, in Input, out Output> {

public suspend fun Raise<Error>.spec(raw: Input): Output

public suspend fun from(value: Input): Either<Error, Output> = either { spec(value) }

public suspend fun fromOrNull(value: Input): Output? = from(value).getOrNull()

public suspend fun fromOrThrow(value: Input): Output =
when (val result = from(value)) {
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Maybe this should use recover({ spec(value) }) { throw ExactException(it) }? To prevent the unnecessary indirection using Either

is Either.Left -> throw ExactException(result.value)
is Either.Right -> result.value
}
}