Reformat stdlib: collections

#KT-5558

libraries/stdlib/common/src/kotlin/collections/AbstractMutableList.kt

@@ -9,6 +9,7 @@ expect abstract class AbstractMutableList<E> : MutableList<E> {
     protected constructor()
 
     // From List
+
     override fun isEmpty(): Boolean
     override fun contains(element: @UnsafeVariance E): Boolean
     override fun containsAll(elements: Collection<@UnsafeVariance E>): Boolean
@@ -16,9 +17,11 @@ expect abstract class AbstractMutableList<E> : MutableList<E> {
     override fun lastIndexOf(element: @UnsafeVariance E): Int
 
     // From MutableCollection
+
     override fun iterator(): MutableIterator<E>
 
     // From MutableList
+
     override fun add(element: E): Boolean
     override fun remove(element: E): Boolean
     override fun addAll(elements: Collection<E>): Boolean

libraries/stdlib/common/src/kotlin/collections/ArrayList.kt

@@ -14,6 +14,7 @@ expect class ArrayList<E> : MutableList<E>, RandomAccess {
     fun ensureCapacity(minCapacity: Int)
 
     // From List
+
     override val size: Int
     override fun isEmpty(): Boolean
     override fun contains(element: @UnsafeVariance E): Boolean
@@ -23,9 +24,11 @@ expect class ArrayList<E> : MutableList<E>, RandomAccess {
     override fun lastIndexOf(element: @UnsafeVariance E): Int
 
     // From MutableCollection
+
     override fun iterator(): MutableIterator<E>
 
     // From MutableList
+
     override fun add(element: E): Boolean
     override fun remove(element: E): Boolean
     override fun addAll(elements: Collection<E>): Boolean

libraries/stdlib/common/src/kotlin/collections/CollectionsH.kt

@@ -15,8 +15,10 @@ expect inline fun <reified T> Collection<T>.toTypedArray(): Array<T>
 
 @SinceKotlin("1.2")
 expect fun <T> MutableList<T>.fill(value: T): Unit
+
 @SinceKotlin("1.2")
 expect fun <T> MutableList<T>.shuffle(): Unit
+
 @SinceKotlin("1.2")
 expect fun <T> Iterable<T>.shuffled(): List<T>
 

libraries/stdlib/common/src/kotlin/collections/HashMap.kt

@@ -12,6 +12,7 @@ expect class HashMap<K, V> : MutableMap<K, V> {
     constructor(original: Map<out K, V>)
 
     // From Map
+
     override val size: Int
     override fun isEmpty(): Boolean
     override fun containsKey(key: K): Boolean
@@ -19,6 +20,7 @@ expect class HashMap<K, V> : MutableMap<K, V> {
     override operator fun get(key: K): V?
 
     // From MutableMap
+
     override fun put(key: K, value: V): V?
     override fun remove(key: K): V?
     override fun putAll(from: Map<out K, V>)

libraries/stdlib/common/src/kotlin/collections/HashSet.kt

@@ -12,12 +12,14 @@ expect class HashSet<E> : MutableSet<E> {
     constructor(elements: Collection<E>)
 
     // From Set
+
     override val size: Int
     override fun isEmpty(): Boolean
     override fun contains(element: @UnsafeVariance E): Boolean
     override fun containsAll(elements: Collection<@UnsafeVariance E>): Boolean
 
     // From MutableSet
+
     override fun iterator(): MutableIterator<E>
     override fun add(element: E): Boolean
     override fun remove(element: E): Boolean

libraries/stdlib/common/src/kotlin/collections/LinkedHashMap.kt

@@ -12,6 +12,7 @@ expect class LinkedHashMap<K, V> : MutableMap<K, V> {
     constructor(original: Map<out K, V>)
 
     // From Map
+
     override val size: Int
     override fun isEmpty(): Boolean
     override fun containsKey(key: K): Boolean
@@ -19,6 +20,7 @@ expect class LinkedHashMap<K, V> : MutableMap<K, V> {
     override fun get(key: K): V?
 
     // From MutableMap
+
     override fun put(key: K, value: V): V?
     override fun remove(key: K): V?
     override fun putAll(from: Map<out K, V>)

libraries/stdlib/common/src/kotlin/collections/LinkedHashSet.kt

@@ -12,12 +12,14 @@ expect class LinkedHashSet<E> : MutableSet<E> {
     constructor(elements: Collection<E>)
 
     // From Set
+
     override val size: Int
     override fun isEmpty(): Boolean
     override fun contains(element: @UnsafeVariance E): Boolean
     override fun containsAll(elements: Collection<@UnsafeVariance E>): Boolean
 
     // From MutableSet
+
     override fun iterator(): MutableIterator<E>
     override fun add(element: E): Boolean
     override fun remove(element: E): Boolean

libraries/stdlib/js/src/kotlin/collections/AbstractMutableList.kt

@@ -120,7 +120,7 @@ public actual abstract class AbstractMutableList<E> protected actual constructor
         }
 
         override fun remove() {
-            check(last != -1) { "Call next() or previous() before removing element from the iterator."}
+            check(last != -1) { "Call next() or previous() before removing element from the iterator." }
 
             removeAt(last)
             index = last
@@ -158,7 +158,7 @@ public actual abstract class AbstractMutableList<E> protected actual constructor
         }
 
         override fun set(element: E) {
-            check(last != -1) { "Call next() or previous() before updating element value with the iterator."}
+            check(last != -1) { "Call next() or previous() before updating element value with the iterator." }
             this@AbstractMutableList[last] = element
         }
     }

libraries/stdlib/js/src/kotlin/collections/AbstractMutableMap.kt

@@ -46,7 +46,8 @@ public actual abstract class AbstractMutableMap<K, V> protected actual construct
     }
 
     private var _keys: MutableSet<K>? = null
-    override val keys: MutableSet<K> get() {
+    override val keys: MutableSet<K>
+        get() {
             if (_keys == null) {
                 _keys = object : AbstractMutableSet<K>() {
                     override fun add(element: K): Boolean = throw UnsupportedOperationException("Add is not supported on keys")
@@ -88,7 +89,8 @@ public actual abstract class AbstractMutableMap<K, V> protected actual construct
     }
 
     private var _values: MutableCollection<V>? = null
-    override val values: MutableCollection<V> get() {
+    override val values: MutableCollection<V>
+        get() {
             if (_values == null) {
                 _values = object : AbstractMutableCollection<V>() {
                     override fun add(element: V): Boolean = throw UnsupportedOperationException("Add is not supported on values")
@@ -113,6 +115,7 @@ public actual abstract class AbstractMutableMap<K, V> protected actual construct
                         if (other !is Collection<*>) return false
                         return AbstractList.orderedEquals(this, other)
                     }
+
                     override fun hashCode(): Int = AbstractList.orderedHashCode(this)
                 }
             }

libraries/stdlib/js/src/kotlin/collections/ArrayList.kt

@@ -24,6 +24,7 @@ public actual open class ArrayList<E> internal constructor(private var array: Ar
      * @param initialCapacity initial capacity (ignored)
      */
     public actual constructor(initialCapacity: Int) : this(emptyArray()) {}
+
     /**
      * Creates an [ArrayList] filled from the [elements] collection.
      */
@@ -31,6 +32,7 @@ public actual open class ArrayList<E> internal constructor(private var array: Ar
 
     /** Does nothing in this ArrayList implementation. */
     public actual fun trimToSize() {}
+
     /** Does nothing in this ArrayList implementation. */
     public actual fun ensureCapacity(minCapacity: Int) {}
 

libraries/stdlib/js/src/kotlin/collections/HashMap.kt

@@ -92,7 +92,8 @@ public actual open class HashMap<K, V> : AbstractMutableMap<K, V>, MutableMap<K,
     actual override fun containsValue(value: V): Boolean = internalMap.any { equality.equals(it.value, value) }
 
     private var _entries: MutableSet<MutableMap.MutableEntry<K, V>>? = null
-    actual override val entries: MutableSet<MutableMap.MutableEntry<K, V>> get() {
+    actual override val entries: MutableSet<MutableMap.MutableEntry<K, V>>
+        get() {
             if (_entries == null) {
                 _entries = createEntrySet()
             }

libraries/stdlib/js/src/kotlin/collections/InternalHashCodeMap.kt

@@ -36,21 +36,18 @@ internal class InternalHashCodeMap<K, V>(override val equality: EqualityComparat
         if (chainOrEntry == null) {
             // This is a new chain, put it to the map.
             backingMap[hashCode] = SimpleEntry(key, value)
-        }
+        } else {
-        else {
             if (chainOrEntry !is Array<*>) {
                 // It is an entry
                 val entry: SimpleEntry<K, V> = chainOrEntry
                 if (equality.equals(entry.key, key)) {
                     return entry.setValue(value)
-                }
+                } else {
-                else {
                     backingMap[hashCode] = arrayOf(entry, SimpleEntry(key, value))
                     size++
                     return null
                 }
-            }
+            } else {
-            else {
                 // Chain already exists, perhaps key also exists.
                 val chain: Array<MutableEntry<K, V>> = chainOrEntry
                 val entry = chain.findEntryInChain(key)
@@ -74,12 +71,10 @@ internal class InternalHashCodeMap<K, V>(override val equality: EqualityComparat
                 deleteProperty(backingMap, hashCode)
                 size--
                 return entry.value
-            }
+            } else {
-            else {
                 return null
             }
-        }
+        } else {
-        else {
             val chain: Array<MutableEntry<K, V>> = chainOrEntry
             for (index in chain.indices) {
                 val entry = chain[index]
@@ -116,12 +111,10 @@ internal class InternalHashCodeMap<K, V>(override val equality: EqualityComparat
             val entry: MutableEntry<K, V> = chainOrEntry
             if (equality.equals(entry.key, key)) {
                 return entry
-            }
+            } else {
-            else {
                 return null
             }
-        }
+        } else {
-        else {
             val chain: Array<MutableEntry<K, V>> = chainOrEntry
             return chain.findEntryInChain(key)
         }
@@ -155,8 +148,7 @@ internal class InternalHashCodeMap<K, V>(override val equality: EqualityComparat
                     isChain = chainOrEntry is Array<*>
                     itemIndex = 0
                     return 0
-                }
+                } else {
-                else {
                     chainOrEntry = null
                     return 1
                 }
@@ -172,8 +164,7 @@ internal class InternalHashCodeMap<K, V>(override val equality: EqualityComparat
                 if (!hasNext()) throw NoSuchElementException()
                 val lastEntry = if (isChain) {
                     chainOrEntry.unsafeCast<Array<MutableEntry<K, V>>>()[itemIndex]
-                }
+                } else {
-                else {
                     chainOrEntry.unsafeCast<MutableEntry<K, V>>()
                 }
                 this.lastEntry = lastEntry

libraries/stdlib/js/src/kotlin/collections/InternalStringMap.kt

@@ -52,8 +52,7 @@ internal class InternalStringMap<K, V>(override val equality: EqualityComparator
             size++
 //            structureChanged(host)
             return null
-        }
+        } else {
-        else {
 //            valueMod++
             return oldValue.unsafeCast<V>()
         }
@@ -67,8 +66,7 @@ internal class InternalStringMap<K, V>(override val equality: EqualityComparator
             size--
 //            structureChanged(host)
             return value.unsafeCast<V>()
-        }
+        } else {
-        else {
 //            valueMod++
             return null
         }

libraries/stdlib/js/src/kotlin/collections/LinkedHashMap.kt

@@ -135,8 +135,7 @@ public actual open class LinkedHashMap<K, V> : HashMap<K, V>, MutableMap<K, V> {
         if (this.next === this) {
             // if this is single element, remove head
             head = null
-        }
+        } else {
-        else {
             if (head === this) {
                 // if this is first element, move head to next
                 head = next
@@ -225,8 +224,7 @@ public actual open class LinkedHashMap<K, V> : HashMap<K, V>, MutableMap<K, V> {
             map.put(key, newEntry)
             newEntry.addToEnd()
             return null
-        }
+        } else {
-        else {
             return old.setValue(value)
         }
     }

libraries/stdlib/js/src/kotlin/collections/LinkedHashSet.kt

@@ -29,6 +29,7 @@ public actual open class LinkedHashSet<E> : HashSet<E>, MutableSet<E> {
     actual constructor(elements: Collection<E>) : super(LinkedHashMap<E, Any>()) {
         addAll(elements)
     }
+
     /**
      * Constructs a new empty [LinkedHashSet].
      *

libraries/stdlib/jvm/src/kotlin/collections/AbstractMutableList.kt

@@ -23,6 +23,7 @@ public actual abstract class AbstractMutableList<E> protected actual constructor
      * @return the element previously at the specified position.
      */
     abstract override fun set(index: Int, element: E): E
+
     /**
      * Removes an element at the specified [index] from the list.
      *
@@ -32,6 +33,7 @@ public actual abstract class AbstractMutableList<E> protected actual constructor
      * @return the element that has been removed.
      */
     abstract override fun removeAt(index: Int): E
+
     /**
      * Inserts an element into the list at the specified [index].
      *

libraries/stdlib/jvm/src/kotlin/collections/MapsJVM.kt

@@ -38,8 +38,8 @@ public fun <K, V> mapOf(pair: Pair<K, V>): Map<K, V> = java.util.Collections.sin
  */
 public inline fun <K, V> ConcurrentMap<K, V>.getOrPut(key: K, defaultValue: () -> V): V {
     // Do not use computeIfAbsent on JVM8 as it would change locking behavior
-    return this.get(key) ?:
+    return this.get(key)
-            defaultValue().let { default -> this.putIfAbsent(key, default) ?: default }
+            ?: defaultValue().let { default -> this.putIfAbsent(key, default) ?: default }
 
 }
 
@@ -57,8 +57,8 @@ public fun <K : Comparable<K>, V> Map<out K, V>.toSortedMap(): SortedMap<K, V> =
  *
  * @sample samples.collections.Maps.Transformations.mapToSortedMapWithComparator
  */
-public fun <K, V> Map<out K, V>.toSortedMap(comparator: Comparator<in K>): SortedMap<K, V>
+public fun <K, V> Map<out K, V>.toSortedMap(comparator: Comparator<in K>): SortedMap<K, V> =
-        = TreeMap<K, V>(comparator).apply { putAll(this@toSortedMap) }
+    TreeMap<K, V>(comparator).apply { putAll(this@toSortedMap) }
 
 /**
  * Returns a new [SortedMap] with the specified contents, given as a list of pairs
@@ -66,8 +66,8 @@ public fun <K, V> Map<out K, V>.toSortedMap(comparator: Comparator<in K>): Sorte
  *
  * @sample samples.collections.Maps.Instantiation.sortedMapFromPairs
  */
-public fun <K : Comparable<K>, V> sortedMapOf(vararg pairs: Pair<K, V>): SortedMap<K, V>
+public fun <K : Comparable<K>, V> sortedMapOf(vararg pairs: Pair<K, V>): SortedMap<K, V> =
-        = TreeMap<K, V>().apply { putAll(pairs) }
+    TreeMap<K, V>().apply { putAll(pairs) }
 
 
 /**
@@ -76,8 +76,8 @@ public fun <K : Comparable<K>, V> sortedMapOf(vararg pairs: Pair<K, V>): SortedM
  * @sample samples.collections.Maps.Transformations.mapToProperties
  */
 @kotlin.internal.InlineOnly
-public inline fun Map<String, String>.toProperties(): Properties
+public inline fun Map<String, String>.toProperties(): Properties =
-        = Properties().apply { putAll(this@toProperties) }
+    Properties().apply { putAll(this@toProperties) }
 
 
 // creates a singleton copy of map, if there is specialization available in target platform, otherwise returns itself
@@ -85,6 +85,6 @@ public inline fun Map<String, String>.toProperties(): Properties
 internal actual inline fun <K, V> Map<K, V>.toSingletonMapOrSelf(): Map<K, V> = toSingletonMap()
 
 // creates a singleton copy of map
-internal actual fun <K, V> Map<out K, V>.toSingletonMap(): Map<K, V>
+internal actual fun <K, V> Map<out K, V>.toSingletonMap(): Map<K, V> =
-        = with (entries.iterator().next()) { java.util.Collections.singletonMap(key, value) }
+    with(entries.iterator().next()) { java.util.Collections.singletonMap(key, value) }
 

libraries/stdlib/jvm/src/kotlin/collections/SequencesJVM.kt

@@ -15,7 +15,7 @@ import kotlin.*
  * @sample samples.collections.Sequences.Building.sequenceFromEnumeration
  */
 @kotlin.internal.InlineOnly
-public inline fun<T> java.util.Enumeration<T>.asSequence(): Sequence<T> = this.iterator().asSequence()
+public inline fun <T> java.util.Enumeration<T>.asSequence(): Sequence<T> = this.iterator().asSequence()
 
 
 internal actual class ConstrainedOnceSequence<T> actual constructor(sequence: Sequence<T>) : Sequence<T> {

libraries/stdlib/src/kotlin/collections/AbstractCollection.kt

@@ -7,7 +7,7 @@ package kotlin.collections
 /**
  * Provides a skeletal implementation of the read-only [Collection] interface.
  *
-* @param E the type of elements contained in the collection. The collection is covariant on its element type.
+ * @param E the type of elements contained in the collection. The collection is covariant on its element type.
  */
 @SinceKotlin("1.1")
 public abstract class AbstractCollection<out E> protected constructor() : Collection<E> {

libraries/stdlib/src/kotlin/collections/AbstractIterator.kt

@@ -17,7 +17,7 @@ private enum class State {
  * A base class to simplify implementing iterators so that implementations only have to implement [computeNext]
  * to implement the iterator, calling [done] when the iteration is complete.
  */
-public abstract class AbstractIterator<T>: Iterator<T> {
+public abstract class AbstractIterator<T> : Iterator<T> {
     private var state = State.NotReady
     private var nextValue: T? = null
 

libraries/stdlib/src/kotlin/collections/AbstractMap.kt

@@ -16,7 +16,7 @@ package kotlin.collections
  *
  * @param K the type of map keys. The map is invariant on its key type.
  * @param V the type of map values. The map is covariant on its value type.
-*/
+ */
 @SinceKotlin("1.1")
 public abstract class AbstractMap<K, out V> protected constructor() : Map<K, V> {
 
@@ -78,8 +78,8 @@ public abstract class AbstractMap<K, out V> protected constructor() : Map<K, V>
      * Accessing this property first time creates a keys view from [entries].
      * All subsequent accesses just return the created instance.
      */
-    private @kotlin.jvm.Volatile var _keys: Set<K>? = null
+    override val keys: Set<K>
-    override val keys: Set<K> get() {
+        get() {
             if (_keys == null) {
                 _keys = object : AbstractSet<K>() {
                     override operator fun contains(element: K): Boolean = containsKey(element)
@@ -98,6 +98,10 @@ public abstract class AbstractMap<K, out V> protected constructor() : Map<K, V>
             return _keys!!
         }
 
+    @kotlin.jvm.Volatile
+    private var _keys: Set<K>? = null
+
+
     override fun toString(): String = entries.joinToString(", ", "{", "}") { toString(it) }
 
     private fun toString(entry: Map.Entry<K, V>): String = toString(entry.key) + "=" + toString(entry.value)
@@ -110,8 +114,8 @@ public abstract class AbstractMap<K, out V> protected constructor() : Map<K, V>
      * Accessing this property first time creates a values view from [entries].
      * All subsequent accesses just return the created instance.
      */
-    private @kotlin.jvm.Volatile var _values: Collection<V>? = null
+    override val values: Collection<V>
-    override val values: Collection<V> get() {
+        get() {
             if (_values == null) {
                 _values = object : AbstractCollection<V>() {
                     override operator fun contains(element: @UnsafeVariance V): Boolean = containsValue(element)
@@ -130,6 +134,9 @@ public abstract class AbstractMap<K, out V> protected constructor() : Map<K, V>
             return _values!!
         }
 
+    @kotlin.jvm.Volatile
+    private var _values: Collection<V>? = null
+
     private fun implFindEntry(key: K): Map.Entry<K, V>? = entries.firstOrNull { it.key == key }
 
     internal companion object {

libraries/stdlib/src/kotlin/collections/Arrays.kt

@@ -10,7 +10,6 @@
 package kotlin.collections
 
 
-
 /**
  * Returns a single list of all elements from all arrays in the given array.
  * @sample samples.collections.Arrays.Transformations.flattenArray

libraries/stdlib/src/kotlin/collections/Collections.kt

@@ -53,7 +53,7 @@ internal object EmptyList : List<Nothing>, Serializable, RandomAccess {
 
 internal fun <T> Array<out T>.asCollection(): Collection<T> = ArrayAsCollection(this, isVarargs = false)
 
-private class ArrayAsCollection<T>(val values: Array<out T>, val isVarargs: Boolean): Collection<T> {
+private class ArrayAsCollection<T>(val values: Array<out T>, val isVarargs: Boolean) : Collection<T> {
     override val size: Int get() = values.size
     override fun isEmpty(): Boolean = values.isEmpty()
     override fun contains(element: T): Boolean = values.contains(element)
@@ -102,15 +102,15 @@ public inline fun <T> arrayListOf(): ArrayList<T> = ArrayList()
  * Returns a new [MutableList] with the given elements.
  * @sample samples.collections.Collections.Lists.mutableList
  */
-public fun <T> mutableListOf(vararg elements: T): MutableList<T>
+public fun <T> mutableListOf(vararg elements: T): MutableList<T> =
-        = if (elements.size == 0) ArrayList() else ArrayList(ArrayAsCollection(elements, isVarargs = true))
+    if (elements.size == 0) ArrayList() else ArrayList(ArrayAsCollection(elements, isVarargs = true))
 
 /**
  * Returns a new [ArrayList] with the given elements.
  * @sample samples.collections.Collections.Lists.arrayList
  */
-public fun <T> arrayListOf(vararg elements: T): ArrayList<T>
+public fun <T> arrayListOf(vararg elements: T): ArrayList<T> =
-        = if (elements.size == 0) ArrayList() else ArrayList(ArrayAsCollection(elements, isVarargs = true))
+    if (elements.size == 0) ArrayList() else ArrayList(ArrayAsCollection(elements, isVarargs = true))
 
 /**
  * Returns a new read-only list either of single given element, if it is not null, or empty list if the element is null. The returned list is serializable (JVM).
@@ -214,7 +214,7 @@ internal fun <T> List<T>.optimizeReadOnlyList() = when (size) {
  * @sample samples.collections.Collections.Lists.binarySearchOnComparable
  * @sample samples.collections.Collections.Lists.binarySearchWithBoundaries
  */
-public fun <T: Comparable<T>> List<T?>.binarySearch(element: T?, fromIndex: Int = 0, toIndex: Int = size): Int {
+public fun <T : Comparable<T>> List<T?>.binarySearch(element: T?, fromIndex: Int = 0, toIndex: Int = size): Int {
     rangeCheck(size, fromIndex, toIndex)
 
     var low = fromIndex
@@ -287,7 +287,12 @@ public fun <T> List<T>.binarySearch(element: T, comparator: Comparator<in T>, fr
  * so that the list (or the specified subrange of list) still remains sorted.
  * @sample samples.collections.Collections.Lists.binarySearchByKey
  */
-public inline fun <T, K : Comparable<K>> List<T>.binarySearchBy(key: K?, fromIndex: Int = 0, toIndex: Int = size, crossinline selector: (T) -> K?): Int =
+public inline fun <T, K : Comparable<K>> List<T>.binarySearchBy(
+    key: K?,
+    fromIndex: Int = 0,
+    toIndex: Int = size,
+    crossinline selector: (T) -> K?
+): Int =
     binarySearch(fromIndex, toIndex) { compareValues(selector(it), key) }
 
 // do not introduce this overload --- too rare

libraries/stdlib/src/kotlin/collections/Iterables.kt

@@ -4,6 +4,7 @@
  */
 @file:kotlin.jvm.JvmMultifileClass
 @file:kotlin.jvm.JvmName("CollectionsKt")
+
 package kotlin.collections
 
 /**
@@ -42,7 +43,7 @@ private fun <T> Collection<T>.safeToConvertToSet() = size > 2 && this is ArrayLi
 
 /** Converts this collection to a set, when it's worth so and it doesn't change contains method behavior. */
 internal fun <T> Iterable<T>.convertToSetForSetOperationWith(source: Iterable<T>): Collection<T> =
-        when(this) {
+    when (this) {
         is Set -> this
         is Collection ->
             when {
@@ -54,7 +55,7 @@ internal fun <T> Iterable<T>.convertToSetForSetOperationWith(source: Iterable<T>
 
 /** Converts this collection to a set, when it's worth so and it doesn't change contains method behavior. */
 internal fun <T> Iterable<T>.convertToSetForSetOperation(): Collection<T> =
-        when(this) {
+    when (this) {
         is Set -> this
         is Collection -> if (this.safeToConvertToSet()) toHashSet() else this
         else -> toHashSet()

libraries/stdlib/src/kotlin/collections/Iterators.kt

@@ -27,7 +27,7 @@ public fun <T> Iterator<T>.withIndex(): Iterator<IndexedValue<T>> = IndexingIter
  * Performs the given [operation] on each element of this [Iterator].
  * @sample samples.collections.Iterators.forEachIterator
  */
-public inline fun <T> Iterator<T>.forEach(operation: (T) -> Unit) : Unit {
+public inline fun <T> Iterator<T>.forEach(operation: (T) -> Unit): Unit {
     for (element in this) operation(element)
 }
 

libraries/stdlib/src/kotlin/collections/MapAccessors.kt

@@ -4,6 +4,7 @@
  */
 
 @file:kotlin.jvm.JvmName("MapAccessorsKt")
+
 package kotlin.collections
 
 import kotlin.reflect.KProperty
@@ -18,8 +19,8 @@ import kotlin.internal.Exact
  * @throws NoSuchElementException when the map doesn't contain value for the property name and doesn't provide an implicit default (see [withDefault]).
  */
 @kotlin.internal.InlineOnly
-public inline operator fun <V, V1: V> Map<in String, @Exact V>.getValue(thisRef: Any?, property: KProperty<*>): V1
+public inline operator fun <V, V1 : V> Map<in String, @Exact V>.getValue(thisRef: Any?, property: KProperty<*>): V1 =
-        = @Suppress("UNCHECKED_CAST") (getOrImplicitDefault(property.name) as V1)
+    @Suppress("UNCHECKED_CAST") (getOrImplicitDefault(property.name) as V1)
 
 /**
  * Returns the value of the property for the given object from this mutable map.
@@ -31,15 +32,15 @@ public inline operator fun <V, V1: V> Map<in String, @Exact V>.getValue(thisRef:
  */
 @kotlin.jvm.JvmName("getVar")
 @kotlin.internal.InlineOnly
-public inline operator fun <V, V1: V> MutableMap<in String, out @Exact V>.getValue(thisRef: Any?, property: KProperty<*>): V1
+public inline operator fun <V, V1 : V> MutableMap<in String, out @Exact V>.getValue(thisRef: Any?, property: KProperty<*>): V1 =
-        = @Suppress("UNCHECKED_CAST") (getOrImplicitDefault(property.name) as V1)
+    @Suppress("UNCHECKED_CAST") (getOrImplicitDefault(property.name) as V1)
 
 @Deprecated("Use getValue() with two type parameters instead")
 @kotlin.jvm.JvmName("getVarContravariant")
 @kotlin.internal.LowPriorityInOverloadResolution
 @kotlin.internal.InlineOnly
-public inline fun <V> MutableMap<in String, in V>.getValue(thisRef: Any?, property: KProperty<*>): V
+public inline fun <V> MutableMap<in String, in V>.getValue(thisRef: Any?, property: KProperty<*>): V =
-        = @Suppress("UNCHECKED_CAST") (getOrImplicitDefault(property.name) as V)
+    @Suppress("UNCHECKED_CAST") (getOrImplicitDefault(property.name) as V)
 
 /**
  * Stores the value of the property for the given object in this mutable map.

libraries/stdlib/src/kotlin/collections/MapWithDefault.kt

@@ -54,20 +54,17 @@ public fun <K, V> MutableMap<K, V>.withDefault(defaultValue: (key: K) -> V): Mut
     }
 
 
-
+private interface MapWithDefault<K, out V> : Map<K, V> {
-
-
-private interface MapWithDefault<K, out V>: Map<K, V> {
     public val map: Map<K, V>
     public fun getOrImplicitDefault(key: K): V
 }
 
-private interface MutableMapWithDefault<K, V>: MutableMap<K, V>, MapWithDefault<K, V> {
+private interface MutableMapWithDefault<K, V> : MutableMap<K, V>, MapWithDefault<K, V> {
     public override val map: MutableMap<K, V>
 }
 
 
-private class MapWithDefaultImpl<K, out V>(public override val map: Map<K,V>, private val default: (key: K) -> V) : MapWithDefault<K, V> {
+private class MapWithDefaultImpl<K, out V>(public override val map: Map<K, V>, private val default: (key: K) -> V) : MapWithDefault<K, V> {
     override fun equals(other: Any?): Boolean = map.equals(other)
     override fun hashCode(): Int = map.hashCode()
     override fun toString(): String = map.toString()
@@ -83,7 +80,7 @@ private class MapWithDefaultImpl<K, out V>(public override val map: Map<K,V>, pr
     override fun getOrImplicitDefault(key: K): V = map.getOrElseNullable(key, { default(key) })
 }
 
-private class MutableMapWithDefaultImpl<K, V>(public override val map: MutableMap<K, V>, private val default: (key: K) -> V): MutableMapWithDefault<K, V> {
+private class MutableMapWithDefaultImpl<K, V>(public override val map: MutableMap<K, V>, private val default: (key: K) -> V) : MutableMapWithDefault<K, V> {
     override fun equals(other: Any?): Boolean = map.equals(other)
     override fun hashCode(): Int = map.hashCode()
     override fun toString(): String = map.toString()

libraries/stdlib/src/kotlin/collections/Maps.kt

@@ -11,7 +11,7 @@ package kotlin.collections
 private object EmptyMap : Map<Any?, Nothing>, Serializable {
     private const val serialVersionUID: Long = 8246714829545688274
 
-    override fun equals(other: Any?): Boolean = other is Map<*,*> && other.isEmpty()
+    override fun equals(other: Any?): Boolean = other is Map<*, *> && other.isEmpty()
     override fun hashCode(): Int = 0
     override fun toString(): String = "{}"
 
@@ -48,7 +48,8 @@ public fun <K, V> emptyMap(): Map<K, V> = @Suppress("UNCHECKED_CAST") (EmptyMap
  *
  * @sample samples.collections.Maps.Instantiation.mapFromPairs
  */
-public fun <K, V> mapOf(vararg pairs: Pair<K, V>): Map<K, V> = if (pairs.size > 0) pairs.toMap(LinkedHashMap(mapCapacity(pairs.size))) else emptyMap()
+public fun <K, V> mapOf(vararg pairs: Pair<K, V>): Map<K, V> =
+    if (pairs.size > 0) pairs.toMap(LinkedHashMap(mapCapacity(pairs.size))) else emptyMap()
 
 /**
  * Returns an empty read-only map.
@@ -80,8 +81,8 @@ public inline fun <K, V> mutableMapOf(): MutableMap<K, V> = LinkedHashMap()
  * @sample samples.collections.Maps.Instantiation.mutableMapFromPairs
  * @sample samples.collections.Maps.Instantiation.emptyMutableMap
  */
-public fun <K, V> mutableMapOf(vararg pairs: Pair<K, V>): MutableMap<K, V>
+public fun <K, V> mutableMapOf(vararg pairs: Pair<K, V>): MutableMap<K, V> =
-        = LinkedHashMap<K, V>(mapCapacity(pairs.size)).apply { putAll(pairs) }
+    LinkedHashMap<K, V>(mapCapacity(pairs.size)).apply { putAll(pairs) }
 
 /**
  * Returns an empty new [HashMap].
@@ -96,8 +97,7 @@ public inline fun <K, V> hashMapOf(): HashMap<K, V> = HashMap<K, V>()
  *
  * @sample samples.collections.Maps.Instantiation.hashMapFromPairs
  */
-public fun <K, V> hashMapOf(vararg pairs: Pair<K, V>): HashMap<K, V>
+public fun <K, V> hashMapOf(vararg pairs: Pair<K, V>): HashMap<K, V> = HashMap<K, V>(mapCapacity(pairs.size)).apply { putAll(pairs) }
-        = HashMap<K, V>(mapCapacity(pairs.size)).apply { putAll(pairs) }
 
 /**
  * Returns an empty new [LinkedHashMap].
@@ -116,8 +116,7 @@ public inline fun <K, V> linkedMapOf(): LinkedHashMap<K, V> = LinkedHashMap<K, V
  *
  * @sample samples.collections.Maps.Instantiation.linkedMapFromPairs
  */
-public fun <K, V> linkedMapOf(vararg pairs: Pair<K, V>): LinkedHashMap<K, V>
+public fun <K, V> linkedMapOf(vararg pairs: Pair<K, V>): LinkedHashMap<K, V> = pairs.toMap(LinkedHashMap(mapCapacity(pairs.size)))
-        = pairs.toMap(LinkedHashMap(mapCapacity(pairs.size)))
 
 /**
  * Calculate the initial capacity of a map, based on Guava's com.google.common.collect.Maps approach. This is equivalent
@@ -145,7 +144,7 @@ public inline fun <K, V> Map<out K, V>.isNotEmpty(): Boolean = !isEmpty()
  * Returns the [Map] if its not `null`, or the empty [Map] otherwise.
  */
 @kotlin.internal.InlineOnly
-public inline fun <K, V> Map<K, V>?.orEmpty() : Map<K, V> = this ?: emptyMap()
+public inline fun <K, V> Map<K, V>?.orEmpty(): Map<K, V> = this ?: emptyMap()
 
 /**
  * Checks if the map contains the given key.
@@ -153,14 +152,14 @@ public inline fun <K, V> Map<K, V>?.orEmpty() : Map<K, V> = this ?: emptyMap()
  * This method allows to use the `x in map` syntax for checking whether an object is contained in the map.
  */
 @kotlin.internal.InlineOnly
-public inline operator fun <@kotlin.internal.OnlyInputTypes K, V> Map<out K, V>.contains(key: K) : Boolean = containsKey(key)
+public inline operator fun <@kotlin.internal.OnlyInputTypes K, V> Map<out K, V>.contains(key: K): Boolean = containsKey(key)
 
 /**
  * Returns the value corresponding to the given [key], or `null` if such a key is not present in the map.
  */
 @kotlin.internal.InlineOnly
-public inline operator fun <@kotlin.internal.OnlyInputTypes K, V> Map<out K, V>.get(key: K): V?
+public inline operator fun <@kotlin.internal.OnlyInputTypes K, V> Map<out K, V>.get(key: K): V? =
-        = @Suppress("UNCHECKED_CAST") (this as Map<K, V>).get(key)
+    @Suppress("UNCHECKED_CAST") (this as Map<K, V>).get(key)
 
 /**
  * Allows to use the index operator for storing values in a mutable map.
@@ -176,8 +175,8 @@ public inline operator fun <K, V> MutableMap<K, V>.set(key: K, value: V): Unit {
  * Allows to overcome type-safety restriction of `containsKey` that requires to pass a key of type `K`.
  */
 @kotlin.internal.InlineOnly
-public inline fun <@kotlin.internal.OnlyInputTypes K> Map<out K, *>.containsKey(key: K): Boolean
+public inline fun <@kotlin.internal.OnlyInputTypes K> Map<out K, *>.containsKey(key: K): Boolean =
-        = @Suppress("UNCHECKED_CAST") (this as Map<K, *>).containsKey(key)
+    @Suppress("UNCHECKED_CAST") (this as Map<K, *>).containsKey(key)
 
 /**
  * Returns `true` if the map maps one or more keys to the specified [value].
@@ -197,8 +196,8 @@ public inline fun <K, @kotlin.internal.OnlyInputTypes V> Map<K, V>.containsValue
  * Allows to overcome type-safety restriction of `remove` that requires to pass a key of type `K`.
  */
 @kotlin.internal.InlineOnly
-public inline fun <@kotlin.internal.OnlyInputTypes K, V> MutableMap<out K, V>.remove(key: K): V?
+public inline fun <@kotlin.internal.OnlyInputTypes K, V> MutableMap<out K, V>.remove(key: K): V? =
-        = @Suppress("UNCHECKED_CAST") (this as MutableMap<K, V>).remove(key)
+    @Suppress("UNCHECKED_CAST") (this as MutableMap<K, V>).remove(key)
 
 /**
  * Returns the key component of the map entry.
@@ -327,7 +326,7 @@ public fun <K, V> MutableMap<in K, in V>.putAll(pairs: Array<out Pair<K, V>>): U
 /**
  * Puts all the elements of the given collection into this [MutableMap] with the first component in the pair being the key and the second the value.
  */
-public fun <K, V> MutableMap<in K, in V>.putAll(pairs: Iterable<Pair<K,V>>): Unit {
+public fun <K, V> MutableMap<in K, in V>.putAll(pairs: Iterable<Pair<K, V>>): Unit {
     for ((key, value) in pairs) {
         put(key, value)
     }
@@ -336,7 +335,7 @@ public fun <K, V> MutableMap<in K, in V>.putAll(pairs: Iterable<Pair<K,V>>): Uni
 /**
  * Puts all the elements of the given sequence into this [MutableMap] with the first component in the pair being the key and the second the value.
  */
-public fun <K, V> MutableMap<in K, in V>.putAll(pairs: Sequence<Pair<K,V>>): Unit {
+public fun <K, V> MutableMap<in K, in V>.putAll(pairs: Sequence<Pair<K, V>>): Unit {
     for ((key, value) in pairs) {
         put(key, value)
     }
@@ -471,15 +470,15 @@ public fun <K, V> Iterable<Pair<K, V>>.toMap(): Map<K, V> {
 /**
  * Populates and returns the [destination] mutable map with key-value pairs from the given collection of pairs.
  */
-public fun <K, V, M : MutableMap<in K, in V>> Iterable<Pair<K, V>>.toMap(destination: M): M
+public fun <K, V, M : MutableMap<in K, in V>> Iterable<Pair<K, V>>.toMap(destination: M): M =
-        = destination.apply { putAll(this@toMap) }
+    destination.apply { putAll(this@toMap) }
 
 /**
  * Returns a new map containing all key-value pairs from the given array of pairs.
  *
  * The returned map preserves the entry iteration order of the original array.
  */
-public fun <K, V> Array<out Pair<K, V>>.toMap(): Map<K, V> = when(size) {
+public fun <K, V> Array<out Pair<K, V>>.toMap(): Map<K, V> = when (size) {
     0 -> emptyMap()
     1 -> mapOf(this[0])
     else -> toMap(LinkedHashMap<K, V>(mapCapacity(size)))
@@ -488,8 +487,8 @@ public fun <K, V> Array<out Pair<K, V>>.toMap(): Map<K, V> = when(size) {
 /**
  *  Populates and returns the [destination] mutable map with key-value pairs from the given array of pairs.
  */
-public fun <K, V, M : MutableMap<in K, in V>> Array<out Pair<K, V>>.toMap(destination: M): M
+public fun <K, V, M : MutableMap<in K, in V>> Array<out Pair<K, V>>.toMap(destination: M): M =
-        = destination.apply { putAll(this@toMap) }
+    destination.apply { putAll(this@toMap) }
 
 /**
  * Returns a new map containing all key-value pairs from the given sequence of pairs.
@@ -501,8 +500,8 @@ public fun <K, V> Sequence<Pair<K, V>>.toMap(): Map<K, V> = toMap(LinkedHashMap<
 /**
  * Populates and returns the [destination] mutable map with key-value pairs from the given sequence of pairs.
  */
-public fun <K, V, M : MutableMap<in K, in V>> Sequence<Pair<K, V>>.toMap(destination: M): M
+public fun <K, V, M : MutableMap<in K, in V>> Sequence<Pair<K, V>>.toMap(destination: M): M =
-        = destination.apply { putAll(this@toMap) }
+    destination.apply { putAll(this@toMap) }
 
 /**
  * Returns a new read-only map containing all key-value pairs from the original map.
@@ -528,8 +527,8 @@ public fun <K, V> Map<out K, V>.toMutableMap(): MutableMap<K, V> = LinkedHashMap
  * Populates and returns the [destination] mutable map with key-value pairs from the given map.
  */
 @SinceKotlin("1.1")
-public fun <K, V, M : MutableMap<in K, in V>> Map<out K, V>.toMap(destination: M): M
+public fun <K, V, M : MutableMap<in K, in V>> Map<out K, V>.toMap(destination: M): M =
-        = destination.apply { putAll(this@toMap) }
+    destination.apply { putAll(this@toMap) }
 
 /**
  * Creates a new read-only map by replacing or adding an entry to this map from a given key-value [pair].
@@ -537,8 +536,8 @@ public fun <K, V, M : MutableMap<in K, in V>> Map<out K, V>.toMap(destination: M
  * The returned map preserves the entry iteration order of the original map.
  * The [pair] is iterated in the end if it has a unique key.
  */
-public operator fun <K, V> Map<out K, V>.plus(pair: Pair<K, V>): Map<K, V>
+public operator fun <K, V> Map<out K, V>.plus(pair: Pair<K, V>): Map<K, V> =
-        = if (this.isEmpty()) mapOf(pair) else LinkedHashMap(this).apply { put(pair.first, pair.second) }
+    if (this.isEmpty()) mapOf(pair) else LinkedHashMap(this).apply { put(pair.first, pair.second) }
 
 /**
  * Creates a new read-only map by replacing or adding entries to this map from a given collection of key-value [pairs].
@@ -546,8 +545,8 @@ public operator fun <K, V> Map<out K, V>.plus(pair: Pair<K, V>): Map<K, V>
  * The returned map preserves the entry iteration order of the original map.
  * Those [pairs] with unique keys are iterated in the end in the order of [pairs] collection.
  */
-public operator fun <K, V> Map<out K, V>.plus(pairs: Iterable<Pair<K, V>>): Map<K, V>
+public operator fun <K, V> Map<out K, V>.plus(pairs: Iterable<Pair<K, V>>): Map<K, V> =
-        = if (this.isEmpty()) pairs.toMap() else LinkedHashMap(this).apply { putAll(pairs) }
+    if (this.isEmpty()) pairs.toMap() else LinkedHashMap(this).apply { putAll(pairs) }
 
 /**
  * Creates a new read-only map by replacing or adding entries to this map from a given array of key-value [pairs].
@@ -555,8 +554,8 @@ public operator fun <K, V> Map<out K, V>.plus(pairs: Iterable<Pair<K, V>>): Map<
  * The returned map preserves the entry iteration order of the original map.
  * Those [pairs] with unique keys are iterated in the end in the order of [pairs] array.
  */
-public operator fun <K, V> Map<out K, V>.plus(pairs: Array<out Pair<K, V>>): Map<K, V>
+public operator fun <K, V> Map<out K, V>.plus(pairs: Array<out Pair<K, V>>): Map<K, V> =
-        = if (this.isEmpty()) pairs.toMap() else LinkedHashMap(this).apply { putAll(pairs) }
+    if (this.isEmpty()) pairs.toMap() else LinkedHashMap(this).apply { putAll(pairs) }
 
 /**
  * Creates a new read-only map by replacing or adding entries to this map from a given sequence of key-value [pairs].
@@ -564,8 +563,8 @@ public operator fun <K, V> Map<out K, V>.plus(pairs: Array<out Pair<K, V>>): Map
  * The returned map preserves the entry iteration order of the original map.
  * Those [pairs] with unique keys are iterated in the end in the order of [pairs] sequence.
  */
-public operator fun <K, V> Map<out K, V>.plus(pairs: Sequence<Pair<K, V>>): Map<K, V>
+public operator fun <K, V> Map<out K, V>.plus(pairs: Sequence<Pair<K, V>>): Map<K, V> =
-        = LinkedHashMap(this).apply { putAll(pairs) }.optimizeReadOnlyMap()
+    LinkedHashMap(this).apply { putAll(pairs) }.optimizeReadOnlyMap()
 
 /**
  * Creates a new read-only map by replacing or adding entries to this map from another [map].
@@ -573,8 +572,8 @@ public operator fun <K, V> Map<out K, V>.plus(pairs: Sequence<Pair<K, V>>): Map<
  * The returned map preserves the entry iteration order of the original map.
  * Those entries of another [map] that are missing in this map are iterated in the end in the order of that [map].
  */
-public operator fun <K, V> Map<out K, V>.plus(map: Map<out K, V>): Map<K, V>
+public operator fun <K, V> Map<out K, V>.plus(map: Map<out K, V>): Map<K, V> =
-        = LinkedHashMap(this).apply { putAll(map) }
+    LinkedHashMap(this).apply { putAll(map) }
 
 
 /**
@@ -623,8 +622,8 @@ public inline operator fun <K, V> MutableMap<in K, in V>.plusAssign(map: Map<K,
  * The returned map preserves the entry iteration order of the original map.
  */
 @SinceKotlin("1.1")
-public operator fun <K, V> Map<out K, V>.minus(key: K): Map<K, V>
+public operator fun <K, V> Map<out K, V>.minus(key: K): Map<K, V> =
-        = this.toMutableMap().apply { minusAssign(key) }.optimizeReadOnlyMap()
+    this.toMutableMap().apply { minusAssign(key) }.optimizeReadOnlyMap()
 
 /**
  * Returns a map containing all entries of the original map except those entries
@@ -633,8 +632,8 @@ public operator fun <K, V> Map<out K, V>.minus(key: K): Map<K, V>
  * The returned map preserves the entry iteration order of the original map.
  */
 @SinceKotlin("1.1")
-public operator fun <K, V> Map<out K, V>.minus(keys: Iterable<K>): Map<K, V>
+public operator fun <K, V> Map<out K, V>.minus(keys: Iterable<K>): Map<K, V> =
-        = this.toMutableMap().apply { minusAssign(keys) }.optimizeReadOnlyMap()
+    this.toMutableMap().apply { minusAssign(keys) }.optimizeReadOnlyMap()
 
 /**
  * Returns a map containing all entries of the original map except those entries
@@ -643,8 +642,8 @@ public operator fun <K, V> Map<out K, V>.minus(keys: Iterable<K>): Map<K, V>
  * The returned map preserves the entry iteration order of the original map.
  */
 @SinceKotlin("1.1")
-public operator fun <K, V> Map<out K, V>.minus(keys: Array<out K>): Map<K, V>
+public operator fun <K, V> Map<out K, V>.minus(keys: Array<out K>): Map<K, V> =
-        = this.toMutableMap().apply { minusAssign(keys) }.optimizeReadOnlyMap()
+    this.toMutableMap().apply { minusAssign(keys) }.optimizeReadOnlyMap()
 
 /**
  * Returns a map containing all entries of the original map except those entries
@@ -653,8 +652,8 @@ public operator fun <K, V> Map<out K, V>.minus(keys: Array<out K>): Map<K, V>
  * The returned map preserves the entry iteration order of the original map.
  */
 @SinceKotlin("1.1")
-public operator fun <K, V> Map<out K, V>.minus(keys: Sequence<K>): Map<K, V>
+public operator fun <K, V> Map<out K, V>.minus(keys: Sequence<K>): Map<K, V> =
-        = this.toMutableMap().apply { minusAssign(keys) }.optimizeReadOnlyMap()
+    this.toMutableMap().apply { minusAssign(keys) }.optimizeReadOnlyMap()
 
 /**
  * Removes the entry with the given [key] from this mutable map.

libraries/stdlib/src/kotlin/collections/MutableCollections.kt

@@ -17,8 +17,8 @@ package kotlin.collections
  * @return `true` if the element has been successfully removed; `false` if it was not present in the collection.
  */
 @kotlin.internal.InlineOnly
-public inline fun <@kotlin.internal.OnlyInputTypes T> MutableCollection<out T>.remove(element: T): Boolean
+public inline fun <@kotlin.internal.OnlyInputTypes T> MutableCollection<out T>.remove(element: T): Boolean =
-        = @Suppress("UNCHECKED_CAST") (this as MutableCollection<T>).remove(element)
+    @Suppress("UNCHECKED_CAST") (this as MutableCollection<T>).remove(element)
 
 /**
  * Removes all of this collection's elements that are also contained in the specified collection.
@@ -28,8 +28,8 @@ public inline fun <@kotlin.internal.OnlyInputTypes T> MutableCollection<out T>.r
  * @return `true` if any of the specified elements was removed from the collection, `false` if the collection was not modified.
  */
 @kotlin.internal.InlineOnly
-public inline fun <@kotlin.internal.OnlyInputTypes T> MutableCollection<out T>.removeAll(elements: Collection<T>): Boolean
+public inline fun <@kotlin.internal.OnlyInputTypes T> MutableCollection<out T>.removeAll(elements: Collection<T>): Boolean =
-        = @Suppress("UNCHECKED_CAST") (this as MutableCollection<T>).removeAll(elements)
+    @Suppress("UNCHECKED_CAST") (this as MutableCollection<T>).removeAll(elements)
 
 /**
  * Retains only the elements in this collection that are contained in the specified collection.
@@ -39,8 +39,8 @@ public inline fun <@kotlin.internal.OnlyInputTypes T> MutableCollection<out T>.r
  * @return `true` if any element was removed from the collection, `false` if the collection was not modified.
  */
 @kotlin.internal.InlineOnly
-public inline fun <@kotlin.internal.OnlyInputTypes T> MutableCollection<out T>.retainAll(elements: Collection<T>): Boolean
+public inline fun <@kotlin.internal.OnlyInputTypes T> MutableCollection<out T>.retainAll(elements: Collection<T>): Boolean =
-        = @Suppress("UNCHECKED_CAST") (this as MutableCollection<T>).retainAll(elements)
+    @Suppress("UNCHECKED_CAST") (this as MutableCollection<T>).retainAll(elements)
 
 /**
  * Removes the element at the specified [index] from this list.
@@ -159,7 +159,7 @@ public fun <T> MutableIterable<T>.retainAll(predicate: (T) -> Boolean): Boolean
 
 private fun <T> MutableIterable<T>.filterInPlace(predicate: (T) -> Boolean, predicateResultToRemove: Boolean): Boolean {
     var result = false
-    with (iterator()) {
+    with(iterator()) {
         while (hasNext())
             if (predicate(next()) == predicateResultToRemove) {
                 remove()
@@ -199,8 +199,7 @@ private fun <T> MutableList<T>.filterInPlace(predicate: (T) -> Boolean, predicat
             removeAt(removeIndex)
 
         return true
-    }
+    } else {
-    else {
         return false
     }
 }

libraries/stdlib/src/kotlin/collections/ReversedViews.kt

@@ -27,6 +27,7 @@ private class ReversedList<T>(private val delegate: MutableList<T>) : AbstractMu
         delegate.add(reversePositionIndex(index), element)
     }
 }
+
 private fun List<*>.reverseElementIndex(index: Int) =
     if (index in 0..lastIndex) lastIndex - index else throw IndexOutOfBoundsException("Element index $index must be in range [${0..lastIndex}].")
 

libraries/stdlib/src/kotlin/collections/Sequences.kt

@@ -91,12 +91,13 @@ public fun <T, R> Sequence<Pair<T, R>>.unzip(): Pair<List<T>, List<R>> {
  * the specified [predicate].
  *
  * @param sendWhen If `true`, values for which the predicate returns `true` are returned. Otherwise,
-* values for which the predicate returns `false` are returned
+ * values for which the predicate returns `false` are returned
  */
-internal class FilteringSequence<T>(private val sequence: Sequence<T>,
+internal class FilteringSequence<T>(
+    private val sequence: Sequence<T>,
     private val sendWhen: Boolean = true,
     private val predicate: (T) -> Boolean
-                                 ) : Sequence<T> {
+) : Sequence<T> {
 
     override fun iterator(): Iterator<T> = object : Iterator<T> {
         val iterator = sequence.iterator()
@@ -203,10 +204,11 @@ constructor(private val sequence: Sequence<T>) : Sequence<IndexedValue<T>> {
  * values as soon as one of the underlying sequences stops returning values.
  */
 internal class MergingSequence<T1, T2, V>
-                                       constructor(private val sequence1: Sequence<T1>,
+constructor(
+    private val sequence1: Sequence<T1>,
     private val sequence2: Sequence<T2>,
     private val transform: (T1, T2) -> V
-                                       ) : Sequence<V> {
+) : Sequence<V> {
     override fun iterator(): Iterator<V> = object : Iterator<V> {
         val iterator1 = sequence1.iterator()
         val iterator2 = sequence2.iterator()
@@ -221,11 +223,11 @@ internal class MergingSequence<T1, T2, V>
 }
 
 internal class FlatteningSequence<T, R, E>
-    constructor(
+constructor(
     private val sequence: Sequence<T>,
     private val transformer: (T) -> R,
     private val iterator: (R) -> Iterator<E>
-    ) : Sequence<E> {
+) : Sequence<E> {
     override fun iterator(): Iterator<E> = object : Iterator<E> {
         val iterator = sequence.iterator()
         var itemIterator: Iterator<E>? = null
@@ -273,16 +275,16 @@ internal interface DropTakeSequence<T> : Sequence<T> {
  * A sequence that skips [startIndex] values from the underlying [sequence]
  * and stops returning values right before [endIndex], i.e. stops at `endIndex - 1`
  */
-internal class SubSequence<T> (
+internal class SubSequence<T>(
     private val sequence: Sequence<T>,
     private val startIndex: Int,
     private val endIndex: Int
-): Sequence<T>, DropTakeSequence<T> {
+) : Sequence<T>, DropTakeSequence<T> {
 
     init {
         require(startIndex >= 0) { "startIndex should be non-negative, but is $startIndex" }
         require(endIndex >= 0) { "endIndex should be non-negative, but is $endIndex" }
-        require(endIndex >= startIndex) { "endIndex should be not less than startIndex, but was $endIndex < $startIndex"}
+        require(endIndex >= startIndex) { "endIndex should be not less than startIndex, but was $endIndex < $startIndex" }
     }
 
     private val count: Int get() = endIndex - startIndex
@@ -297,7 +299,7 @@ internal class SubSequence<T> (
 
         // Shouldn't be called from constructor to avoid premature iteration
         private fun drop() {
-            while(position < startIndex && iterator.hasNext()) {
+            while (position < startIndex && iterator.hasNext()) {
                 iterator.next()
                 position++
             }
@@ -322,13 +324,13 @@ internal class SubSequence<T> (
  * A sequence that returns at most [count] values from the underlying [sequence], and stops returning values
  * as soon as that count is reached.
  */
-internal class TakeSequence<T> (
+internal class TakeSequence<T>(
     private val sequence: Sequence<T>,
     private val count: Int
 ) : Sequence<T>, DropTakeSequence<T> {
 
     init {
-        require (count >= 0) { "count must be non-negative, but was $count." }
+        require(count >= 0) { "count must be non-negative, but was $count." }
     }
 
     override fun drop(n: Int): Sequence<T> = if (n >= count) emptySequence() else SubSequence(sequence, n, count)
@@ -356,9 +358,10 @@ internal class TakeSequence<T> (
  * `true`, and stops returning values once the function returns `false` for the next element.
  */
 internal class TakeWhileSequence<T>
-                                 constructor(private val sequence: Sequence<T>,
+constructor(
+    private val sequence: Sequence<T>,
     private val predicate: (T) -> Boolean
-                                 ) : Sequence<T> {
+) : Sequence<T> {
     override fun iterator(): Iterator<T> = object : Iterator<T> {
         val iterator = sequence.iterator()
         var nextState: Int = -1 // -1 for unknown, 0 for done, 1 for continue
@@ -402,12 +405,12 @@ internal class TakeWhileSequence<T>
  * A sequence that skips the specified number of values from the underlying [sequence] and returns
  * all values after that.
  */
-internal class DropSequence<T> (
+internal class DropSequence<T>(
     private val sequence: Sequence<T>,
     private val count: Int
 ) : Sequence<T>, DropTakeSequence<T> {
     init {
-        require (count >= 0) { "count must be non-negative, but was $count." }
+        require(count >= 0) { "count must be non-negative, but was $count." }
     }
 
     override fun drop(n: Int): Sequence<T> = DropSequence(sequence, count + n)
@@ -442,9 +445,10 @@ internal class DropSequence<T> (
  * all values after that.
  */
 internal class DropWhileSequence<T>
-                                 constructor(private val sequence: Sequence<T>,
+constructor(
+    private val sequence: Sequence<T>,
     private val predicate: (T) -> Boolean
-                                 ) : Sequence<T> {
+) : Sequence<T> {
 
     override fun iterator(): Iterator<T> = object : Iterator<T> {
         val iterator = sequence.iterator()
@@ -485,11 +489,11 @@ internal class DropWhileSequence<T>
     }
 }
 
-internal class DistinctSequence<T, K>(private val source : Sequence<T>, private val keySelector : (T) -> K) : Sequence<T> {
+internal class DistinctSequence<T, K>(private val source: Sequence<T>, private val keySelector: (T) -> K) : Sequence<T> {
     override fun iterator(): Iterator<T> = DistinctIterator(source.iterator(), keySelector)
 }
 
-private class DistinctIterator<T, K>(private val source : Iterator<T>, private val keySelector : (T) -> K) : AbstractIterator<T>() {
+private class DistinctIterator<T, K>(private val source: Iterator<T>, private val keySelector: (T) -> K) : AbstractIterator<T>() {
     private val observed = HashSet<K>()
 
     override fun computeNext() {
@@ -508,7 +512,7 @@ private class DistinctIterator<T, K>(private val source : Iterator<T>, private v
 }
 
 
-private class GeneratorSequence<T: Any>(private val getInitialValue: () -> T?, private val getNextValue: (T) -> T?): Sequence<T> {
+private class GeneratorSequence<T : Any>(private val getInitialValue: () -> T?, private val getNextValue: (T) -> T?) : Sequence<T> {
     override fun iterator(): Iterator<T> = object : Iterator<T> {
         var nextItem: T? = null
         var nextState: Int = -2 // -2 for initial unknown, -1 for next unknown, 0 for done, 1 for continue
@@ -553,7 +557,6 @@ public fun <T> Sequence<T>.constrainOnce(): Sequence<T> {
 }
 
 
-
 /**
  * Returns a sequence which invokes the function to calculate the next value on each iteration until the function returns `null`.
  *
@@ -601,6 +604,6 @@ public fun <T : Any> generateSequence(seed: T?, nextFunction: (T) -> T?): Sequen
  *
  * @sample samples.collections.Sequences.Building.generateSequenceWithLazySeed
  */
-public fun <T: Any> generateSequence(seedFunction: () -> T?, nextFunction: (T) -> T?): Sequence<T> =
+public fun <T : Any> generateSequence(seedFunction: () -> T?, nextFunction: (T) -> T?): Sequence<T> =
     GeneratorSequence(seedFunction, nextFunction)
 

libraries/stdlib/src/kotlin/collections/Sets.kt

@@ -32,6 +32,7 @@ internal object EmptySet : Set<Nothing>, Serializable {
  * @sample samples.collections.Collections.Sets.emptyReadOnlySet
  */
 public fun <T> emptySet(): Set<T> = EmptySet
+
 /**
  * Returns a new read-only set with the given elements.
  * Elements of the set are iterated in the order they were specified.

libraries/stdlib/src/kotlin/collections/SlidingWindow.kt

@@ -86,7 +86,7 @@ internal class MovingSubList<out E>(private val list: List<E>) : AbstractList<E>
  *
  * Buffer overflow is not allowed so [add] doesn't overwrite tail but raises an exception.
  */
-private class RingBuffer<T>(val capacity: Int): AbstractList<T>(), RandomAccess {
+private class RingBuffer<T>(val capacity: Int) : AbstractList<T>(), RandomAccess {
     init {
         require(capacity >= 0) { "ring buffer capacity should not be negative but it is $capacity" }
     }