Bring back handleErrorWith

arrow-libs/core/arrow-core/api/arrow-core.api

@@ -150,6 +150,7 @@ public final class arrow/core/EitherKt {
 	public static final fun flatMap (Larrow/core/Either;Lkotlin/jvm/functions/Function1;)Larrow/core/Either;
 	public static final fun flatten (Larrow/core/Either;)Larrow/core/Either;
 	public static final fun getOrElse (Larrow/core/Either;Lkotlin/jvm/functions/Function1;)Ljava/lang/Object;
+	public static final fun handleErrorWith (Larrow/core/Either;Lkotlin/jvm/functions/Function1;)Larrow/core/Either;
 	public static final fun left (Ljava/lang/Object;)Larrow/core/Either;
 	public static final fun leftNel (Ljava/lang/Object;)Larrow/core/Either;
 	public static final fun merge (Larrow/core/Either;)Ljava/lang/Object;
@@ -244,6 +245,7 @@ public final class arrow/core/IorKt {
 	public static final fun flatMap (Larrow/core/Ior;Lkotlin/jvm/functions/Function2;Lkotlin/jvm/functions/Function1;)Larrow/core/Ior;
 	public static final fun flatten (Larrow/core/Ior;Lkotlin/jvm/functions/Function2;)Larrow/core/Ior;
 	public static final fun getOrElse (Larrow/core/Ior;Lkotlin/jvm/functions/Function1;)Ljava/lang/Object;
+	public static final fun handleErrorWith (Larrow/core/Ior;Lkotlin/jvm/functions/Function2;Lkotlin/jvm/functions/Function1;)Larrow/core/Ior;
 	public static final fun leftIor (Ljava/lang/Object;)Larrow/core/Ior;
 	public static final fun rightIor (Ljava/lang/Object;)Larrow/core/Ior;
 	public static final fun toIorNel (Larrow/core/Ior;)Larrow/core/Ior;

arrow-libs/core/arrow-core/api/arrow-core.klib.api

@@ -312,6 +312,7 @@ final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?, #D: kotlin/Any?> (
 final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?, #D: kotlin/Any?> (kotlin.collections/Map<#A, #B>).arrow.core/padZip(kotlin.collections/Map<#A, #C>, kotlin/Function3<#A, #B?, #C?, #D>): kotlin.collections/Map<#A, #D> // arrow.core/padZip|padZip@kotlin.collections.Map<0:0,0:1>(kotlin.collections.Map<0:0,0:2>;kotlin.Function3<0:0,0:1?,0:2?,0:3>){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>;3§<kotlin.Any?>}[0]
 final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?, #D: kotlin/Any?> (kotlin.sequences/Sequence<#A>).arrow.core/zip(kotlin.sequences/Sequence<#B>, kotlin.sequences/Sequence<#C>, kotlin/Function3<#A, #B, #C, #D>): kotlin.sequences/Sequence<#D> // arrow.core/zip|zip@kotlin.sequences.Sequence<0:0>(kotlin.sequences.Sequence<0:1>;kotlin.sequences.Sequence<0:2>;kotlin.Function3<0:0,0:1,0:2,0:3>){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>;3§<kotlin.Any?>}[0]
 final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?, #D: kotlin/Any?> (kotlin/Triple<#A, #B, #C>).arrow.core/plus(#D): arrow.core/Tuple4<#A, #B, #C, #D> // arrow.core/plus|plus@kotlin.Triple<0:0,0:1,0:2>(0:3){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>;3§<kotlin.Any?>}[0]
+final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (arrow.core/Either<#A, #B>).arrow.core/handleErrorWith(kotlin/Function1<#A, arrow.core/Either<#C, #B>>): arrow.core/Either<#C, #B> // arrow.core/handleErrorWith|handleErrorWith@arrow.core.Either<0:0,0:1>(kotlin.Function1<0:0,arrow.core.Either<0:2,0:1>>){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>}[0]
 final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (arrow.core/NonEmptyList<#C>).arrow.core/unzip(kotlin/Function1<#C, kotlin/Pair<#A, #B>>): kotlin/Pair<arrow.core/NonEmptyList<#A>, arrow.core/NonEmptyList<#B>> // arrow.core/unzip|unzip@arrow.core.NonEmptyList<0:2>(kotlin.Function1<0:2,kotlin.Pair<0:0,0:1>>){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>}[0]
 final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (kotlin.collections/Iterable<#A>).arrow.core/crosswalkMap(kotlin/Function1<#A, kotlin.collections/Map<#B, #C>>): kotlin.collections/Map<#B, kotlin.collections/List<#C>> // arrow.core/crosswalkMap|crosswalkMap@kotlin.collections.Iterable<0:0>(kotlin.Function1<0:0,kotlin.collections.Map<0:1,0:2>>){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>}[0]
 final fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (kotlin.collections/Map<#A, #B>).arrow.core/align(kotlin.collections/Map<#A, #C>): kotlin.collections/Map<#A, arrow.core/Ior<#B, #C>> // arrow.core/align|align@kotlin.collections.Map<0:0,0:1>(kotlin.collections.Map<0:0,0:2>){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>}[0]
@@ -505,6 +506,7 @@ final inline fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (arrow.core
 final inline fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (arrow.core/Either<#A, #B>).arrow.core/flatMap(kotlin/Function1<#B, arrow.core/Either<#A, #C>>): arrow.core/Either<#A, #C> // arrow.core/flatMap|flatMap@arrow.core.Either<0:0,0:1>(kotlin.Function1<0:1,arrow.core.Either<0:0,0:2>>){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>}[0]
 final inline fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (arrow.core/Either<#A, #C>).arrow.core/recover(kotlin/Function2<arrow.core.raise/Raise<#B>, #A, #C>): arrow.core/Either<#B, #C> // arrow.core/recover|recover@arrow.core.Either<0:0,0:2>(kotlin.Function2<arrow.core.raise.Raise<0:1>,0:0,0:2>){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>}[0]
 final inline fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (arrow.core/Ior<#A, #B>).arrow.core/flatMap(kotlin/Function2<#A, #A, #A>, kotlin/Function1<#B, arrow.core/Ior<#A, #C>>): arrow.core/Ior<#A, #C> // arrow.core/flatMap|flatMap@arrow.core.Ior<0:0,0:1>(kotlin.Function2<0:0,0:0,0:0>;kotlin.Function1<0:1,arrow.core.Ior<0:0,0:2>>){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>}[0]
+final inline fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (arrow.core/Ior<#A, #B>).arrow.core/handleErrorWith(kotlin/Function2<#B, #B, #B>, kotlin/Function1<#A, arrow.core/Ior<#C, #B>>): arrow.core/Ior<#C, #B> // arrow.core/handleErrorWith|handleErrorWith@arrow.core.Ior<0:0,0:1>(kotlin.Function2<0:1,0:1,0:1>;kotlin.Function1<0:0,arrow.core.Ior<0:2,0:1>>){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>}[0]
 final inline fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (arrow.core/NonEmptyList<#B>).arrow.core/mapOrAccumulate(kotlin/Function2<#A, #A, #A>, kotlin/Function2<arrow.core.raise/RaiseAccumulate<#A>, #B, #C>): arrow.core/Either<#A, arrow.core/NonEmptyList<#C>> // arrow.core/mapOrAccumulate|mapOrAccumulate@arrow.core.NonEmptyList<0:1>(kotlin.Function2<0:0,0:0,0:0>;kotlin.Function2<arrow.core.raise.RaiseAccumulate<0:0>,0:1,0:2>){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>}[0]
 final inline fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (arrow.core/NonEmptyList<#B>).arrow.core/mapOrAccumulate(kotlin/Function2<arrow.core.raise/RaiseAccumulate<#A>, #B, #C>): arrow.core/Either<arrow.core/NonEmptyList<#A>, arrow.core/NonEmptyList<#C>> // arrow.core/mapOrAccumulate|mapOrAccumulate@arrow.core.NonEmptyList<0:1>(kotlin.Function2<arrow.core.raise.RaiseAccumulate<0:0>,0:1,0:2>){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>}[0]
 final inline fun <#A: kotlin/Any?, #B: kotlin/Any?, #C: kotlin/Any?> (kotlin.collections/Iterable<#A>).arrow.core/align(kotlin.collections/Iterable<#B>, kotlin/Function1<arrow.core/Ior<#A, #B>, #C>): kotlin.collections/List<#C> // arrow.core/align|align@kotlin.collections.Iterable<0:0>(kotlin.collections.Iterable<0:1>;kotlin.Function1<arrow.core.Ior<0:0,0:1>,0:2>){0§<kotlin.Any?>;1§<kotlin.Any?>;2§<kotlin.Any?>}[0]

arrow-libs/core/arrow-core/src/commonMain/kotlin/arrow/core/Either.kt

@@ -1292,6 +1292,21 @@ public inline fun <A, B, C> Either<A, B>.flatMap(f: (right: B) -> Either<A, C>):
   }
 }
 
+/**
+ * Binds the given function across [Left], that is,
+ * Map, or transform, the left value [A] of this [Either] into a new [Either] with a left value of type [C].
+ * Returns a new [Either] with either the original right value of type [B] or the newly transformed left value of type [C].
+ *
+ * @param f The function to bind across [Left].
+ */
+public fun <A, B, C> Either<A, B>.handleErrorWith(f: (A) -> Either<C, B>): Either<C, B> {
+  contract { callsInPlace(f, InvocationKind.AT_MOST_ONCE) }
+  return when (this) {
+    is Left -> f(this.value)
+    is Right -> this
+  }
+}
+
 public fun <A, B> Either<A, Either<A, B>>.flatten(): Either<A, B> =
   flatMap(::identity)
 

arrow-libs/core/arrow-core/src/commonMain/kotlin/arrow/core/Ior.kt

@@ -411,6 +411,22 @@ public inline fun <A, B, D> Ior<A, B>.flatMap(combine: (A, A) -> A, f: (B) -> Io
     }
   }
 
+/**
+ * Binds the given function across [Ior.Left].
+ *
+ * @param f The function to bind across [Ior.Left].
+ */
+public inline fun <A, B, D> Ior<A, B>.handleErrorWith(combine: (B, B) -> B, f: (A) -> Ior<D, B>): Ior<D, B> =
+  when (this) {
+    is Left -> f(value)
+    is Right -> this
+    is Both -> when (val l = f(leftValue)) {
+      is Left -> Both(l.value, this.rightValue)
+      is Right -> Right(combine(this.rightValue, l.value))
+      is Both -> Both(l.leftValue, combine(this.rightValue, l.rightValue))
+    }
+  }
+
 public inline fun <A, B> Ior<A, B>.getOrElse(default: (A) -> B): B {
   contract { callsInPlace(default, InvocationKind.AT_MOST_ONCE) }
   return when (this) {