Reformat Iterable

kotlin-result/src/commonMain/kotlin/com/github/michaelbull/result/Iterable.kt

@@ -4,7 +4,10 @@ package com.github.michaelbull.result
  * Accumulates value starting with [initial] value and applying [operation] from left to right to
  * current accumulator value and each element.
  */
-public inline fun <T, R, E> Iterable<T>.fold(initial: R, operation: (acc: R, T) -> Result<R, E>): Result<R, E> {
+public inline fun <T, R, E> Iterable<T>.fold(
+    initial: R,
+    operation: (acc: R, T) -> Result<R, E>,
+): Result<R, E> {
     var accumulator = initial
 
     for (element in this) {
@@ -21,11 +24,15 @@ public inline fun <T, R, E> Iterable<T>.fold(initial: R, operation: (acc: R, T)
  * Accumulates value starting with [initial] value and applying [operation] from right to left to
  * each element and current accumulator value.
  */
-public inline fun <T, R, E> List<T>.foldRight(initial: R, operation: (T, acc: R) -> Result<R, E>): Result<R, E> {
+public inline fun <T, R, E, C : Result<R, E>> List<T>.foldRight(
+    initial: R,
+    operation: (T, acc: R) -> Result<R, E>,
+): Result<R, E> {
     var accumulator = initial
 
     if (!isEmpty()) {
         val iterator = listIterator(size)
+
         while (iterator.hasPrevious()) {
             accumulator = when (val result = operation(iterator.previous(), accumulator)) {
                 is Ok -> result.value
@@ -43,7 +50,7 @@ public inline fun <T, R, E> List<T>.foldRight(initial: R, operation: (T, acc: R)
  *
  * - Elm: [Result.Extra.combine](http://package.elm-lang.org/packages/elm-community/result-extra/2.2.0/Result-Extra#combine)
  */
-public fun <V, E> combine(vararg results: Result<V, E>): Result<List<V>, E> {
+public fun <V, E, R : Result<V, E>> combine(vararg results: R): Result<List<V>, E> {
     return results.asIterable().combine()
 }
 
@@ -54,12 +61,14 @@ public fun <V, E> combine(vararg results: Result<V, E>): Result<List<V>, E> {
  * - Elm: [Result.Extra.combine](http://package.elm-lang.org/packages/elm-community/result-extra/2.2.0/Result-Extra#combine)
  */
 public fun <V, E> Iterable<Result<V, E>>.combine(): Result<List<V>, E> {
-    return Ok(map {
+    val values = map {
         when (it) {
             is Ok -> it.value
             is Err -> return it
         }
-    })
+    }
+
+    return Ok(values)
 }
 
 /**
@@ -68,7 +77,7 @@ public fun <V, E> Iterable<Result<V, E>>.combine(): Result<List<V>, E> {
  *
  * - Haskell: [Data.Either.lefts](https://hackage.haskell.org/package/base-4.10.0.0/docs/Data-Either.html#v:lefts)
  */
-public fun <V, E> getAll(vararg results: Result<V, E>): List<V> {
+public fun <V, E, R : Result<V, E>> getAll(vararg results: R): List<V> {
     return results.asIterable().getAll()
 }
 
@@ -88,7 +97,7 @@ public fun <V, E> Iterable<Result<V, E>>.getAll(): List<V> {
  *
  * - Haskell: [Data.Either.rights](https://hackage.haskell.org/package/base-4.10.0.0/docs/Data-Either.html#v:rights)
  */
-public fun <V, E> getAllErrors(vararg results: Result<V, E>): List<E> = results.asIterable().getAllErrors()
+public fun <V, E, R : Result<V, E>> getAllErrors(vararg results: R): List<E> = results.asIterable().getAllErrors()
 
 /**
  * Extracts from an [Iterable] of [Results][Result] all the [Err] elements. All the [Err] elements
@@ -107,7 +116,7 @@ public fun <V, E> Iterable<Result<V, E>>.getAllErrors(): List<E> {
  *
  * - Haskell: [Data.Either.partitionEithers](https://hackage.haskell.org/package/base-4.10.0.0/docs/Data-Either.html#v:partitionEithers)
  */
-public fun <V, E> partition(vararg results: Result<V, E>): Pair<List<V>, List<E>> {
+public fun <V, E, R : Result<V, E>> partition(vararg results: R): Pair<List<V>, List<E>> {
     return results.asIterable().partition()
 }
 
@@ -140,12 +149,14 @@ public fun <V, E> Iterable<Result<V, E>>.partition(): Pair<List<V>, List<E>> {
 public inline fun <V, E, U> Iterable<V>.mapResult(
     transform: (V) -> Result<U, E>,
 ): Result<List<U>, E> {
-    return Ok(map { element ->
+    val values = map { element ->
         when (val transformed = transform(element)) {
             is Ok -> transformed.value
             is Err -> return transformed
         }
-    })
+    }
+
+    return Ok(values)
 }
 
 /**
@@ -157,12 +168,14 @@ public inline fun <V, E, U, C : MutableCollection<in U>> Iterable<V>.mapResultTo
     destination: C,
     transform: (V) -> Result<U, E>,
 ): Result<C, E> {
-    return Ok(mapTo(destination) { element ->
+    val values = mapTo(destination) { element ->
         when (val transformed = transform(element)) {
             is Ok -> transformed.value
             is Err -> return transformed
         }
-    })
+    }
+
+    return Ok(values)
 }
 
 /**
@@ -174,13 +187,15 @@ public inline fun <V, E, U, C : MutableCollection<in U>> Iterable<V>.mapResultTo
 public inline fun <V, E, U : Any> Iterable<V>.mapResultNotNull(
     transform: (V) -> Result<U, E>?,
 ): Result<List<U>, E> {
-    return Ok(mapNotNull { element ->
+    val values = mapNotNull { element ->
         when (val transformed = transform(element)) {
             is Ok -> transformed.value
             is Err -> return transformed
             null -> null
         }
-    })
+    }
+
+    return Ok(values)
 }
 
 /**
@@ -192,13 +207,15 @@ public inline fun <V, E, U : Any, C : MutableCollection<in U>> Iterable<V>.mapRe
     destination: C,
     transform: (V) -> Result<U, E>?,
 ): Result<C, E> {
-    return Ok(mapNotNullTo(destination) { element ->
+    val values = mapNotNullTo(destination) { element ->
         when (val transformed = transform(element)) {
             is Ok -> transformed.value
             is Err -> return transformed
             null -> null
         }
-    })
+    }
+
+    return Ok(values)
 }
 
 /**
@@ -210,12 +227,14 @@ public inline fun <V, E, U : Any, C : MutableCollection<in U>> Iterable<V>.mapRe
 public inline fun <V, E, U> Iterable<V>.mapResultIndexed(
     transform: (index: Int, V) -> Result<U, E>,
 ): Result<List<U>, E> {
-    return Ok(mapIndexed { index, element ->
+    val values = mapIndexed { index, element ->
         when (val transformed = transform(index, element)) {
             is Ok -> transformed.value
             is Err -> return transformed
         }
-    })
+    }
+
+    return Ok(values)
 }
 
 /**
@@ -227,12 +246,14 @@ public inline fun <V, E, U, C : MutableCollection<in U>> Iterable<V>.mapResultIn
     destination: C,
     transform: (index: Int, V) -> Result<U, E>,
 ): Result<C, E> {
-    return Ok(mapIndexedTo(destination) { index, element ->
+    val values = mapIndexedTo(destination) { index, element ->
         when (val transformed = transform(index, element)) {
             is Ok -> transformed.value
             is Err -> return transformed
         }
-    })
+    }
+
+    return Ok(values)
 }
 
 /**
@@ -244,13 +265,15 @@ public inline fun <V, E, U, C : MutableCollection<in U>> Iterable<V>.mapResultIn
 public inline fun <V, E, U : Any> Iterable<V>.mapResultIndexedNotNull(
     transform: (index: Int, V) -> Result<U, E>?,
 ): Result<List<U>, E> {
-    return Ok(mapIndexedNotNull { index, element ->
+    val values = mapIndexedNotNull { index, element ->
         when (val transformed = transform(index, element)) {
             is Ok -> transformed.value
             is Err -> return transformed
             null -> null
         }
-    })
+    }
+
+    return Ok(values)
 }
 
 /**
@@ -262,11 +285,13 @@ public inline fun <V, E, U : Any, C : MutableCollection<in U>> Iterable<V>.mapRe
     destination: C,
     transform: (index: Int, V) -> Result<U, E>?,
 ): Result<C, E> {
-    return Ok(mapIndexedNotNullTo(destination) { index, element ->
+    val values = mapIndexedNotNullTo(destination) { index, element ->
         when (val transformed = transform(index, element)) {
             is Ok -> transformed.value
             is Err -> return transformed
             null -> null
         }
-    })
+    }
+
+    return Ok(values)
 }