23 lines
675 B
Kotlin
23 lines
675 B
Kotlin
package moe.kageru.kagebot.extensions
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import arrow.Kind
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import arrow.core.Either
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import arrow.core.Tuple3
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import arrow.core.getOrElse
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import arrow.typeclasses.Functor
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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, A2, F> Tuple3<A, B, C>.mapFirst(AP: Functor<F>, op: (A) -> Kind<F, A2>) = let { (a, b, c) ->
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AP.run { op(a).map { Tuple3(it, b, c) } }
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}
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fun <A, B, C, B2, F> Tuple3<A, B, C>.mapSecond(AP: Functor<F>, op: (B) -> Kind<F, B2>) = let { (a, b, c) ->
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AP.run { op(b).map { Tuple3(a, it, c) } }
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}
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