24 lines
725 B
Kotlin
24 lines
725 B
Kotlin
package moe.kageru.kagebot.extensions
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import arrow.core.Either
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import arrow.core.Option
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import arrow.core.Tuple3
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import arrow.core.getOrElse
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import arrow.optics.pFirst
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import arrow.optics.pSecond
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fun <L, R> Either<L, R>.on(op: (R) -> Unit): Either<L, R> {
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this.map { op(it) }
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return this
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}
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fun <T> Either<*, T>.unwrap(): T = getOrElse { error("Attempted to unwrap Either.left") }
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fun <A, B, C, R> Tuple3<A, B, C>.mapSecond(op: (B) -> Option<R>): Option<Tuple3<A, R, C>> {
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return op(this.b).map { Tuple3.pSecond<A, B, C, R>().set(this, it) }
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}
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fun <A, B, C, R> Tuple3<A, B, C>.mapFirst(op: (A) -> Option<R>): Option<Tuple3<R, B, C>> {
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return op(this.a).map { Tuple3.pFirst<A, B, C, R>().set(this, it) }
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}
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