Share MutabilityOwnership class between collection implementations

Author: ilya-g

kotlinx-collections-immutable/src/main/kotlin/kotlinx/collections/immutable/implementations/immutableList/PersistentVectorBuilder.kt

@@ -19,8 +19,7 @@ package kotlinx.collections.immutable.implementations.immutableList
 import kotlinx.collections.immutable.PersistentList
 import kotlinx.collections.immutable.internal.ListImplementation.checkElementIndex
 import kotlinx.collections.immutable.internal.ListImplementation.checkPositionIndex
-
-private class MutabilityOwnership // TODO: Rename to MutabilityOwnership?
+import kotlinx.collections.immutable.internal.MutabilityOwnership
 
 class PersistentVectorBuilder<E>(private var vector: PersistentList<E>,
                                  private var vectorRoot: Array<Any?>?,

kotlinx-collections-immutable/src/main/kotlin/kotlinx/collections/immutable/implementations/immutableMap/PersistentHashMapBuilder.kt

@@ -17,8 +17,7 @@
 package kotlinx.collections.immutable.implementations.immutableMap
 
 import kotlinx.collections.immutable.PersistentMap
-
-internal class MutabilityOwnership
+import kotlinx.collections.immutable.internal.MutabilityOwnership
 
 internal class PersistentHashMapBuilder<K, V>(private var map: PersistentHashMap<K, V>) : PersistentMap.Builder<K, V>, AbstractMutableMap<K, V>() {
     internal var ownership = MutabilityOwnership()

kotlinx-collections-immutable/src/main/kotlin/kotlinx/collections/immutable/implementations/immutableMap/TrieNode.kt

@@ -16,6 +16,8 @@
 
 package kotlinx.collections.immutable.implementations.immutableMap
 
+import kotlinx.collections.immutable.internal.MutabilityOwnership
+
 
 internal const val MAX_BRANCHING_FACTOR = 32
 internal const val LOG_MAX_BRANCHING_FACTOR = 5

kotlinx-collections-immutable/src/main/kotlin/kotlinx/collections/immutable/implementations/immutableSet/PersistentHashSetBuilder.kt

@@ -17,8 +17,7 @@
 package kotlinx.collections.immutable.implementations.immutableSet
 
 import kotlinx.collections.immutable.PersistentSet
-
-internal class MutabilityOwnership
+import kotlinx.collections.immutable.internal.MutabilityOwnership
 
 internal class PersistentHashSetBuilder<E>(private var set: PersistentHashSet<E>) : AbstractMutableSet<E>(), PersistentSet.Builder<E> {
     internal var ownership = MutabilityOwnership()

kotlinx-collections-immutable/src/main/kotlin/kotlinx/collections/immutable/implementations/immutableSet/TrieNode.kt

@@ -16,6 +16,8 @@
 
 package kotlinx.collections.immutable.implementations.immutableSet
 
+import kotlinx.collections.immutable.internal.MutabilityOwnership
+
 
 internal const val MAX_BRANCHING_FACTOR = 32
 internal const val LOG_MAX_BRANCHING_FACTOR = 5

kotlinx-collections-immutable/src/main/kotlin/kotlinx/collections/immutable/internal/MutabilityOwnership.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2016-2019 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package kotlinx.collections.immutable.internal
+
+/**
+ * The mutability ownership token of a persistent collection builder.
+ *
+ * Used to mark persistent data structures, that are owned by a collection builder and can be mutated by it.
+ */
+internal class MutabilityOwnership