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Improve performance of Either.fold, Either.mapLeft and Either.mapRight

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This commit is contained in:
Him188 2021-06-25 20:16:59 +08:00
parent ce4373a322
commit abb28ee6d2
1 changed files with 4 additions and 8 deletions

12
mirai-core-utils/src/commonMain/kotlin/Either.kt
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@ -99,15 +99,15 @@ public value class Either<out L : Any, out R : Any?> private constructor(
@Suppress("RemoveExplicitTypeArguments")
return this.fold(
onLeft = { invoke<T, R>(block(it)) },
onRight = { invoke<T, R>(right) }
onRight = { invoke<T, R>(it) }
)
}
public inline fun <reified L : Any, reified R, reified T : Any> Either<L, R>.mapRight(block: (R) -> T): Either<L, T> {
@Suppress("RemoveExplicitTypeArguments")
return this.fold(
onLeft = { invoke<L, T>(left) },
onRight = { invoke<L, T>(right.let(block)) }
onLeft = { invoke<L, T>(it) },
onRight = { invoke<L, T>(it.let(block)) }
)
}
@ -115,11 +115,7 @@ public value class Either<out L : Any, out R : Any?> private constructor(
public inline fun <reified L : Any, reified R, T> Either<L, R>.fold(
onLeft: (L) -> T,
onRight: (R) -> T,
): T {
this.leftOrNull?.let { return onLeft(it) }
this.rightOrNull?.let { return onRight(it) }
error("value(${getTypeHint(this.value)}) is neither left(${getTypeHint<L>()}) or right(${getTypeHint<R>()}).")
}
): T = leftOrNull?.let { onLeft(it) } ?: value.cast<R>().let(onRight)
public inline fun <reified T> Either<Throwable, T>.toResult(): Result<T> = this.fold(
onLeft = { Result.failure(it) },