Merge pull request #38 from ra1028/v0.5.0

Bump version to 0.5.0

.version

@@ -0,0 +1 @@
+0.5.0

Cartfile

@@ -1 +1 @@
-github "ra1028/DifferenceKit" ~> 1.1
+github "ra1028/DifferenceKit" ~> 1.2

Cartfile.resolved

@@ -1 +1 @@
-github "ra1028/DifferenceKit" "1.1.3"
+github "ra1028/DifferenceKit" "1.2.0"

DiffableDataSources.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |spec|
   spec.name = 'DiffableDataSources'
-  spec.version  = '0.1.0'
+  spec.version  = `cat .version`
   spec.author = { 'ra1028' => 'r.fe51028.r@gmail.com' }
   spec.homepage = 'https://github.com/ra1028/DiffableDataSources'
   spec.documentation_url = 'https://ra1028.github.io/DiffableDataSources'
@@ -8,7 +8,6 @@ Pod::Spec.new do |spec|
   spec.source = { :git => 'https://github.com/ra1028/DiffableDataSources.git', :tag => spec.version.to_s }
   spec.license = { :type => 'Apache 2.0', :file => 'LICENSE' }
   spec.requires_arc = true
-  spec.source_files = 'Sources/**/*.swift'
   spec.swift_versions = ["5.0", "5.1"]
 
   differenekit_version = '~> 1.1'
@@ -17,11 +16,16 @@ Pod::Spec.new do |spec|
   spec.tvos.dependency 'DifferenceKit/UIKitExtension', differenekit_version
   spec.osx.dependency 'DifferenceKit/AppKitExtension', differenekit_version
 
-  spec.ios.frameworks = 'UIKit'
-  spec.tvos.frameworks = 'UIKit'
-  spec.osx.frameworks = 'Appkit'
+  spec.source_files       = 'Sources/Internal/*.swift', 'Sources/*.swift'
+  spec.ios.source_files   = 'Sources/UIKit/*.swift'
+  spec.tvos.source_files  = 'Sources/UIKit/*.swift'
+  spec.osx.source_files   = 'Sources/AppKit/*.swift'
 
-  spec.ios.deployment_target = '9.0'
+  spec.ios.frameworks  = 'UIKit'
+  spec.tvos.frameworks = 'UIKit'
+  spec.osx.frameworks  = 'Appkit'
+
+  spec.ios.deployment_target  = '9.0'
   spec.tvos.deployment_target = '9.0'
-  spec.osx.deployment_target = '10.11'
+  spec.osx.deployment_target  = '10.11'
 end

Examples/Example-iOS/InsertionSortViewController.swift

@@ -107,7 +107,7 @@ final class InsertionSortViewController: UIViewController {
     }
 
     func randmize(animated: Bool) {
-        let snapshot = DiffableDataSourceSnapshot<Section, Node>()
+        var snapshot = DiffableDataSourceSnapshot<Section, Node>()
         let rows = Int(collectionView.bounds.height / nodeSize.height) - 1
         let columns = Int(collectionView.bounds.width / nodeSize.width)
 
@@ -126,7 +126,7 @@ final class InsertionSortViewController: UIViewController {
         }
 
         var isNextSortRequired = false
-        let snapshot = dataSource.snapshot()
+        var snapshot = dataSource.snapshot()
 
         for section in snapshot.sectionIdentifiers where !section.isSorted {
             section.sortNext()

Examples/Example-iOS/MountainsViewController.swift

@@ -50,7 +50,7 @@ final class MountainsViewController: UIViewController {
             .filter { $0.contains(filter) }
             .sorted { $0.name < $1.name }
 
-        let snapshot = DiffableDataSourceSnapshot<Section, Mountain>()
+        var snapshot = DiffableDataSourceSnapshot<Section, Mountain>()
         snapshot.appendSections([.main])
         snapshot.appendItems(mountains)
         dataSource.apply(snapshot)

Examples/Example-iOS/TopViewController.swift

@@ -42,7 +42,7 @@ final class TopViewController: UIViewController {
     }
 
     func reset() {
-        let snapshot = DiffableDataSourceSnapshot<Section, Item>()
+        var snapshot = DiffableDataSourceSnapshot<Section, Item>()
         snapshot.appendSections([.main])
         snapshot.appendItems([.mountains, .insertionSort])
         dataSource.apply(snapshot)

Examples/Example-macOS/MountainsViewController.swift

@@ -49,7 +49,7 @@ final class MountainsViewController: NSViewController {
             .filter { $0.contains(filter) }
             .sorted { $0.name < $1.name }
 
-        let snapshot = DiffableDataSourceSnapshot<Section, Mountain>()
+        var snapshot = DiffableDataSourceSnapshot<Section, Mountain>()
         snapshot.appendSections([.main])
         snapshot.appendItems(mountains)
         dataSource.apply(snapshot)

Gemfile

@@ -1,4 +1,4 @@
 source "https://rubygems.org"
 
-gem 'cocoapods', '1.7.2'
-gem 'jazzy', '0.9.4'
+gem 'cocoapods', '1.8.4'
+gem 'jazzy', '0.11.2'

Gemfile.lock

@@ -1,24 +1,27 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    CFPropertyList (3.0.0)
+    CFPropertyList (3.0.2)
     activesupport (4.2.11.1)
       i18n (~> 0.7)
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
+    algoliasearch (1.27.1)
+      httpclient (~> 2.8, >= 2.8.3)
+      json (>= 1.5.1)
     atomos (0.1.3)
-    claide (1.0.2)
-    cocoapods (1.7.2)
+    claide (1.0.3)
+    cocoapods (1.8.4)
       activesupport (>= 4.0.2, < 5)
       claide (>= 1.0.2, < 2.0)
-      cocoapods-core (= 1.7.2)
+      cocoapods-core (= 1.8.4)
       cocoapods-deintegrate (>= 1.0.3, < 2.0)
       cocoapods-downloader (>= 1.2.2, < 2.0)
       cocoapods-plugins (>= 1.0.0, < 2.0)
       cocoapods-search (>= 1.0.0, < 2.0)
       cocoapods-stats (>= 1.0.0, < 2.0)
-      cocoapods-trunk (>= 1.3.1, < 2.0)
+      cocoapods-trunk (>= 1.4.0, < 2.0)
       cocoapods-try (>= 1.1.0, < 2.0)
       colored2 (~> 3.1)
       escape (~> 0.0.4)
@@ -27,65 +30,63 @@ GEM
       molinillo (~> 0.6.6)
       nap (~> 1.0)
       ruby-macho (~> 1.4)
-      xcodeproj (>= 1.10.0, < 2.0)
-    cocoapods-core (1.7.2)
+      xcodeproj (>= 1.11.1, < 2.0)
+    cocoapods-core (1.8.4)
       activesupport (>= 4.0.2, < 6)
+      algoliasearch (~> 1.0)
+      concurrent-ruby (~> 1.1)
       fuzzy_match (~> 2.0.4)
       nap (~> 1.0)
     cocoapods-deintegrate (1.0.4)
-    cocoapods-downloader (1.2.2)
+    cocoapods-downloader (1.3.0)
     cocoapods-plugins (1.0.0)
       nap
     cocoapods-search (1.0.0)
     cocoapods-stats (1.1.0)
-    cocoapods-trunk (1.3.1)
+    cocoapods-trunk (1.4.1)
       nap (>= 0.8, < 2.0)
       netrc (~> 0.11)
     cocoapods-try (1.1.0)
     colored2 (3.1.2)
     concurrent-ruby (1.1.5)
     escape (0.0.4)
-    ffi (1.11.1)
-    fourflusher (2.3.0)
+    ffi (1.11.3)
+    fourflusher (2.3.1)
     fuzzy_match (2.0.4)
     gh_inspector (1.1.3)
+    httpclient (2.8.3)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
-    jazzy (0.9.4)
-      cocoapods (~> 1.0)
-      mustache (~> 0.99)
+    jazzy (0.11.2)
+      cocoapods (~> 1.5)
+      mustache (~> 1.1)
       open4
-      redcarpet (~> 3.2)
+      redcarpet (~> 3.4)
       rouge (>= 2.0.6, < 4.0)
-      sass (~> 3.4)
+      sassc (~> 2.1)
       sqlite3 (~> 1.3)
       xcinvoke (~> 0.3.0)
+    json (2.3.1)
     liferaft (0.0.6)
-    minitest (5.11.3)
+    minitest (5.13.0)
     molinillo (0.6.6)
-    mustache (0.99.8)
+    mustache (1.1.1)
     nanaimo (0.2.6)
     nap (1.1.0)
     netrc (0.11.0)
     open4 (1.3.4)
-    rb-fsevent (0.10.3)
-    rb-inotify (0.10.0)
-      ffi (~> 1.0)
-    redcarpet (3.4.0)
-    rouge (3.4.1)
+    redcarpet (3.5.1)
+    rouge (3.13.0)
     ruby-macho (1.4.0)
-    sass (3.7.4)
-      sass-listen (~> 4.0.0)
-    sass-listen (4.0.0)
-      rb-fsevent (~> 0.9, >= 0.9.4)
-      rb-inotify (~> 0.9, >= 0.9.7)
+    sassc (2.2.1)
+      ffi (~> 1.9)
     sqlite3 (1.4.1)
     thread_safe (0.3.6)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
     xcinvoke (0.3.0)
       liferaft (~> 0.0.6)
-    xcodeproj (1.10.0)
+    xcodeproj (1.13.0)
       CFPropertyList (>= 2.3.3, < 4.0)
       atomos (~> 0.1.3)
       claide (>= 1.0.2, < 2.0)
@@ -96,8 +97,8 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  cocoapods (= 1.7.2)
-  jazzy (= 0.9.4)
+  cocoapods (= 1.8.4)
+  jazzy (= 0.11.2)
 
 BUNDLED WITH
-   2.0.1
+   2.0.2

Package.resolved

@@ -6,8 +6,8 @@
         "repositoryURL": "https://github.com/ra1028/DifferenceKit.git",
         "state": {
           "branch": null,
-          "revision": "4eb31f8e85e4cb13732f9664d6e01e507cd592a0",
-          "version": "1.1.3"
+          "revision": "62745d7780deef4a023a792a1f8f763ec7bf9705",
+          "version": "1.2.0"
         }
       }
     ]

Package.swift

@@ -11,7 +11,7 @@ let package = Package(
         .library(name: "DiffableDataSources", targets: ["DiffableDataSources"])
     ],
     dependencies: [
-        .package(url: "https://github.com/ra1028/DifferenceKit.git", .upToNextMinor(from: "1.1.0"))
+        .package(url: "https://github.com/ra1028/DifferenceKit.git", .upToNextMinor(from: "1.2.0"))
     ],
     targets: [
         .target(

README.md

@@ -91,7 +91,7 @@ $ open DiffableDataSources.xcworkspace
 
 First, define the type representing section.  
 It should conforms to `Hashable` for identifies from the all sections.  
-Type of enum can used conveniently befause it conforms `Hashable` by default.  
+Type of enum can used conveniently because it conforms `Hashable` by default.  
 
 ```swift
 enum Section {
@@ -144,7 +144,9 @@ let snapshot = DiffableDataSourceSnapshot<Section, User>()
 snapshot.appendSections([.main])
 snapshot.appendItems(users)
 
-dataSource.apply(snapshot)
+dataSource.apply(snapshot) {
+    // completion
+}
 ```
 
 Check the documentation for more detailed API.  

Sources/AppKit/CocoaCollectionViewDiffableDataSource.swift

@@ -33,14 +33,18 @@ open class CocoaCollectionViewDiffableDataSource<SectionIdentifierType: Hashable
     ///   - snapshot: A snapshot object to be applied to data model.
     ///   - animatingDifferences: A Boolean value indicating whether to update with
     ///                           diffing animation.
-    public func apply(_ snapshot: DiffableDataSourceSnapshot<SectionIdentifierType, ItemIdentifierType>, animatingDifferences: Bool = true) {
+    ///   - completion: An optional completion block which is called when the complete
+    ///                 performing updates.
+    public func apply(_ snapshot: DiffableDataSourceSnapshot<SectionIdentifierType, ItemIdentifierType>, animatingDifferences: Bool = true, completion: (() -> Void)? = nil) {
         core.apply(
             snapshot,
             view: collectionView,
             animatingDifferences: animatingDifferences,
             performUpdates: { collectionView, changeset, setSections in
                 collectionView.reload(using: changeset, setData: setSections)
-        })
+        },
+            completion: completion
+        )
     }
 
     /// Returns a new snapshot object of current state.

Sources/DiffableDataSourceSnapshot.swift

@@ -1,7 +1,7 @@
 /// A class for backporting `NSDiffableDataSourceSnapshot` introduced in iOS 13.0+, macOS 10.15+, tvOS 13.0+.
 /// Represents the mutable state of diffable data source of UI.
-public class DiffableDataSourceSnapshot<SectionIdentifierType: Hashable, ItemIdentifierType: Hashable> {
-    internal let structure = SnapshotStructure<SectionIdentifierType, ItemIdentifierType>()
+public struct DiffableDataSourceSnapshot<SectionIdentifierType: Hashable, ItemIdentifierType: Hashable> {
+    internal var structure = SnapshotStructure<SectionIdentifierType, ItemIdentifierType>()
 
     /// Creates a new empty snapshot object.
     public init() {}
@@ -81,7 +81,7 @@ public class DiffableDataSourceSnapshot<SectionIdentifierType: Hashable, ItemIde
     /// - Parameters:
     ///   - identifiers: The item identifiers to be appended.
     ///   - sectionIdentifier: An identifier of section to append the given identiciers.
-    public func appendItems(_ identifiers: [ItemIdentifierType], toSection sectionIdentifier: SectionIdentifierType? = nil) {
+    public mutating func appendItems(_ identifiers: [ItemIdentifierType], toSection sectionIdentifier: SectionIdentifierType? = nil) {
         structure.append(itemIDs: identifiers, to: sectionIdentifier)
     }
 
@@ -90,7 +90,7 @@ public class DiffableDataSourceSnapshot<SectionIdentifierType: Hashable, ItemIde
     /// - Parameters:
     ///   - identifiers: The item identifiers to be inserted.
     ///   - beforeIdentifier: An identifier of item.
-    public func insertItems(_ identifiers: [ItemIdentifierType], beforeItem beforeIdentifier: ItemIdentifierType) {
+    public mutating func insertItems(_ identifiers: [ItemIdentifierType], beforeItem beforeIdentifier: ItemIdentifierType) {
         structure.insert(itemIDs: identifiers, before: beforeIdentifier)
     }
 
@@ -99,7 +99,7 @@ public class DiffableDataSourceSnapshot<SectionIdentifierType: Hashable, ItemIde
     /// - Parameters:
     ///   - identifiers: The item identifiers to be inserted.
     ///   - afterIdentifier: An identifier of item.
-    public func insertItems(_ identifiers: [ItemIdentifierType], afterItem afterIdentifier: ItemIdentifierType) {
+    public mutating func insertItems(_ identifiers: [ItemIdentifierType], afterItem afterIdentifier: ItemIdentifierType) {
         structure.insert(itemIDs: identifiers, after: afterIdentifier)
     }
 
@@ -107,12 +107,12 @@ public class DiffableDataSourceSnapshot<SectionIdentifierType: Hashable, ItemIde
     ///
     /// - Parameters:
     ///   - identifiers: The item identifiers to be deleted.
-    public func deleteItems(_ identifiers: [ItemIdentifierType]) {
+    public mutating func deleteItems(_ identifiers: [ItemIdentifierType]) {
         structure.remove(itemIDs: identifiers)
     }
 
     /// Deletes the all items in the snapshot.
-    public func deleteAllItems() {
+    public mutating func deleteAllItems() {
         structure.removeAllItems()
     }
 
@@ -121,7 +121,7 @@ public class DiffableDataSourceSnapshot<SectionIdentifierType: Hashable, ItemIde
     /// - Parameters:
     ///   - identifier: An item identifier to be moved.
     ///   - toIdentifier: An identifier of item.
-    public func moveItem(_ identifier: ItemIdentifierType, beforeItem toIdentifier: ItemIdentifierType) {
+    public mutating func moveItem(_ identifier: ItemIdentifierType, beforeItem toIdentifier: ItemIdentifierType) {
         structure.move(itemID: identifier, before: toIdentifier)
     }
 
@@ -130,7 +130,7 @@ public class DiffableDataSourceSnapshot<SectionIdentifierType: Hashable, ItemIde
     /// - Parameters:
     ///   - identifier: An item identifier to be moved.
     ///   - toIdentifier: An identifier of item.
-    public func moveItem(_ identifier: ItemIdentifierType, afterItem toIdentifier: ItemIdentifierType) {
+    public mutating func moveItem(_ identifier: ItemIdentifierType, afterItem toIdentifier: ItemIdentifierType) {
         structure.move(itemID: identifier, after: toIdentifier)
     }
 
@@ -138,7 +138,7 @@ public class DiffableDataSourceSnapshot<SectionIdentifierType: Hashable, ItemIde
     ///
     /// - Parameters:
     ///   - identifiers: The item identifiers to be reloaded.
-    public func reloadItems(_ identifiers: [ItemIdentifierType]) {
+    public mutating func reloadItems(_ identifiers: [ItemIdentifierType]) {
         structure.update(itemIDs: identifiers)
     }
 
@@ -146,7 +146,7 @@ public class DiffableDataSourceSnapshot<SectionIdentifierType: Hashable, ItemIde
     ///
     /// - Parameters:
     ///   - identifiers: The section identifiers to be appended.
-    public func appendSections(_ identifiers: [SectionIdentifierType]) {
+    public mutating func appendSections(_ identifiers: [SectionIdentifierType]) {
         structure.append(sectionIDs: identifiers)
     }
 
@@ -155,7 +155,7 @@ public class DiffableDataSourceSnapshot<SectionIdentifierType: Hashable, ItemIde
     /// - Parameters:
     ///   - identifiers: The section identifiers to be inserted.
     ///   - toIdentifier: An identifier of setion.
-    public func insertSections(_ identifiers: [SectionIdentifierType], beforeSection toIdentifier: SectionIdentifierType) {
+    public mutating func insertSections(_ identifiers: [SectionIdentifierType], beforeSection toIdentifier: SectionIdentifierType) {
         structure.insert(sectionIDs: identifiers, before: toIdentifier)
     }
 
@@ -164,7 +164,7 @@ public class DiffableDataSourceSnapshot<SectionIdentifierType: Hashable, ItemIde
     /// - Parameters:
     ///   - identifiers: The section identifiers to be inserted.
     ///   - toIdentifier: An identifier of setion.
-    public func insertSections(_ identifiers: [SectionIdentifierType], afterSection toIdentifier: SectionIdentifierType) {
+    public mutating func insertSections(_ identifiers: [SectionIdentifierType], afterSection toIdentifier: SectionIdentifierType) {
         structure.insert(sectionIDs: identifiers, after: toIdentifier)
     }
 
@@ -172,7 +172,7 @@ public class DiffableDataSourceSnapshot<SectionIdentifierType: Hashable, ItemIde
     ///
     /// - Parameters:
     ///   - identifiers: The section identifiers to be deleted.
-    public func deleteSections(_ identifiers: [SectionIdentifierType]) {
+    public mutating func deleteSections(_ identifiers: [SectionIdentifierType]) {
         structure.remove(sectionIDs: identifiers)
     }
 
@@ -181,7 +181,7 @@ public class DiffableDataSourceSnapshot<SectionIdentifierType: Hashable, ItemIde
     /// - Parameters:
     ///   - identifier: A section identifier to be moved.
     ///   - toIdentifier: An identifier of section.
-    public func moveSection(_ identifier: SectionIdentifierType, beforeSection toIdentifier: SectionIdentifierType) {
+    public mutating func moveSection(_ identifier: SectionIdentifierType, beforeSection toIdentifier: SectionIdentifierType) {
         structure.move(sectionID: identifier, before: toIdentifier)
     }
 
@@ -190,7 +190,7 @@ public class DiffableDataSourceSnapshot<SectionIdentifierType: Hashable, ItemIde
     /// - Parameters:
     ///   - identifier: A section identifier to be moved.
     ///   - toIdentifier: An identifier of section.
-    public func moveSection(_ identifier: SectionIdentifierType, afterSection toIdentifier: SectionIdentifierType) {
+    public mutating func moveSection(_ identifier: SectionIdentifierType, afterSection toIdentifier: SectionIdentifierType) {
         structure.move(sectionID: identifier, after: toIdentifier)
     }
 
@@ -198,7 +198,7 @@ public class DiffableDataSourceSnapshot<SectionIdentifierType: Hashable, ItemIde
     ///
     /// - Parameters:
     ///   - identifiers: The section identifiers to be reloaded.
-    public func reloadSections(_ identifiers: [SectionIdentifierType]) {
+    public mutating func reloadSections(_ identifiers: [SectionIdentifierType]) {
         structure.update(sectionIDs: identifiers)
     }
 }

Sources/Internal/DiffableDataSourceCore.swift

@@ -13,7 +13,8 @@ final class DiffableDataSourceCore<SectionIdentifierType: Hashable, ItemIdentifi
         _ snapshot: DiffableDataSourceSnapshot<SectionIdentifierType, ItemIdentifierType>,
         view: View?,
         animatingDifferences: Bool,
-        performUpdates: @escaping (View, StagedChangeset<[Section]>, @escaping ([Section]) -> Void) -> Void
+        performUpdates: @escaping (View, StagedChangeset<[Section]>, @escaping ([Section]) -> Void) -> Void,
+        completion: (() -> Void)?
         ) {
         dispatcher.dispatch { [weak self] in
             guard let self = self else {
@@ -35,20 +36,23 @@ final class DiffableDataSourceCore<SectionIdentifierType: Hashable, ItemIdentifi
                 }
             }
 
+            CATransaction.begin()
+            CATransaction.setCompletionBlock(completion)
+
             if animatingDifferences {
                 performDiffingUpdates()
             }
             else {
-                CATransaction.begin()
                 CATransaction.setDisableActions(true)
                 performDiffingUpdates()
-                CATransaction.commit()
             }
+
+            CATransaction.commit()
         }
     }
 
     func snapshot() -> DiffableDataSourceSnapshot<SectionIdentifierType, ItemIdentifierType> {
-        let snapshot = DiffableDataSourceSnapshot<SectionIdentifierType, ItemIdentifierType>()
+        var snapshot = DiffableDataSourceSnapshot<SectionIdentifierType, ItemIdentifierType>()
         snapshot.structure.sections = currentSnapshot.structure.sections
         return snapshot
     }

Sources/Internal/SnapshotStructure.swift

@@ -1,7 +1,7 @@
 import Foundation
 import DifferenceKit
 
-final class SnapshotStructure<SectionID: Hashable, ItemID: Hashable> {
+struct SnapshotStructure<SectionID: Hashable, ItemID: Hashable> {
     struct Item: Differentiable, Equatable {
         var differenceIdentifier: ItemID
         var isReloaded: Bool
@@ -35,7 +35,7 @@ final class SnapshotStructure<SectionID: Hashable, ItemID: Hashable> {
             self.init(id: id, items: [], isReloaded: false)
         }
 
-        init<C: Collection>(source: Section, elements: C) where C.Element == Item {
+        init<C: Swift.Collection>(source: Section, elements: C) where C.Element == Item {
             self.init(id: source.differenceIdentifier, items: Array(elements), isReloaded: source.isReloaded)
         }
 
@@ -68,7 +68,7 @@ final class SnapshotStructure<SectionID: Hashable, ItemID: Hashable> {
         return itemPositionMap()[itemID]?.section.differenceIdentifier
     }
 
-    func append(itemIDs: [ItemID], to sectionID: SectionID? = nil, file: StaticString = #file, line: UInt = #line) {
+    mutating func append(itemIDs: [ItemID], to sectionID: SectionID? = nil, file: StaticString = #file, line: UInt = #line) {
         let index: Array<Section>.Index
 
         if let sectionID = sectionID {
@@ -90,7 +90,7 @@ final class SnapshotStructure<SectionID: Hashable, ItemID: Hashable> {
         sections[index].elements.append(contentsOf: items)
     }
 
-    func insert(itemIDs: [ItemID], before beforeItemID: ItemID, file: StaticString = #file, line: UInt = #line) {
+    mutating func insert(itemIDs: [ItemID], before beforeItemID: ItemID, file: StaticString = #file, line: UInt = #line) {
         guard let itemPosition = itemPositionMap()[beforeItemID] else {
             specifiedItemIsNotFound(beforeItemID, file: file, line: line)
         }
@@ -99,7 +99,7 @@ final class SnapshotStructure<SectionID: Hashable, ItemID: Hashable> {
         sections[itemPosition.sectionIndex].elements.insert(contentsOf: items, at: itemPosition.itemRelativeIndex)
     }
 
-    func insert(itemIDs: [ItemID], after afterItemID: ItemID, file: StaticString = #file, line: UInt = #line) {
+    mutating func insert(itemIDs: [ItemID], after afterItemID: ItemID, file: StaticString = #file, line: UInt = #line) {
         guard let itemPosition = itemPositionMap()[afterItemID] else {
             specifiedItemIsNotFound(afterItemID, file: file, line: line)
         }
@@ -109,7 +109,7 @@ final class SnapshotStructure<SectionID: Hashable, ItemID: Hashable> {
         sections[itemPosition.sectionIndex].elements.insert(contentsOf: items, at: itemIndex)
     }
 
-    func remove(itemIDs: [ItemID]) {
+    mutating func remove(itemIDs: [ItemID]) {
         let itemPositionMap = self.itemPositionMap()
         var removeIndexSetMap = [Int: IndexSet]()
 
@@ -128,13 +128,13 @@ final class SnapshotStructure<SectionID: Hashable, ItemID: Hashable> {
         }
     }
 
-    func removeAllItems() {
+    mutating func removeAllItems() {
         for sectionIndex in sections.indices {
             sections[sectionIndex].elements.removeAll()
         }
     }
 
-    func move(itemID: ItemID, before beforeItemID: ItemID, file: StaticString = #file, line: UInt = #line) {
+    mutating func move(itemID: ItemID, before beforeItemID: ItemID, file: StaticString = #file, line: UInt = #line) {
         guard let removed = remove(itemID: itemID) else {
             specifiedItemIsNotFound(itemID, file: file, line: line)
         }
@@ -146,7 +146,7 @@ final class SnapshotStructure<SectionID: Hashable, ItemID: Hashable> {
         sections[itemPosition.sectionIndex].elements.insert(removed, at: itemPosition.itemRelativeIndex)
     }
 
-    func move(itemID: ItemID, after afterItemID: ItemID, file: StaticString = #file, line: UInt = #line) {
+    mutating func move(itemID: ItemID, after afterItemID: ItemID, file: StaticString = #file, line: UInt = #line) {
         guard let removed = remove(itemID: itemID) else {
             specifiedItemIsNotFound(itemID, file: file, line: line)
         }
@@ -159,7 +159,7 @@ final class SnapshotStructure<SectionID: Hashable, ItemID: Hashable> {
         sections[itemPosition.sectionIndex].elements.insert(removed, at: itemIndex)
     }
 
-    func update(itemIDs: [ItemID], file: StaticString = #file, line: UInt = #line) {
+    mutating func update(itemIDs: [ItemID], file: StaticString = #file, line: UInt = #line) {
         let itemPositionMap = self.itemPositionMap()
 
         for itemID in itemIDs {
@@ -171,12 +171,12 @@ final class SnapshotStructure<SectionID: Hashable, ItemID: Hashable> {
         }
     }
 
-    func append(sectionIDs: [SectionID]) {
+    mutating func append(sectionIDs: [SectionID]) {
         let newSections = sectionIDs.lazy.map(Section.init)
         sections.append(contentsOf: newSections)
     }
 
-    func insert(sectionIDs: [SectionID], before beforeSectionID: SectionID, file: StaticString = #file, line: UInt = #line) {
+    mutating func insert(sectionIDs: [SectionID], before beforeSectionID: SectionID, file: StaticString = #file, line: UInt = #line) {
         guard let sectionIndex = sectionIndex(of: beforeSectionID) else {
             specifiedSectionIsNotFound(beforeSectionID, file: file, line: line)
         }
@@ -185,7 +185,7 @@ final class SnapshotStructure<SectionID: Hashable, ItemID: Hashable> {
         sections.insert(contentsOf: newSections, at: sectionIndex)
     }
 
-    func insert(sectionIDs: [SectionID], after afterSectionID: SectionID, file: StaticString = #file, line: UInt = #line) {
+    mutating func insert(sectionIDs: [SectionID], after afterSectionID: SectionID, file: StaticString = #file, line: UInt = #line) {
         guard let beforeIndex = sectionIndex(of: afterSectionID) else {
             specifiedSectionIsNotFound(afterSectionID, file: file, line: line)
         }
@@ -195,13 +195,13 @@ final class SnapshotStructure<SectionID: Hashable, ItemID: Hashable> {
         sections.insert(contentsOf: newSections, at: sectionIndex)
     }
 
-    func remove(sectionIDs: [SectionID]) {
+    mutating func remove(sectionIDs: [SectionID]) {
         for sectionID in sectionIDs {
             remove(sectionID: sectionID)
         }
     }
 
-    func move(sectionID: SectionID, before beforeSectionID: SectionID, file: StaticString = #file, line: UInt = #line) {
+    mutating func move(sectionID: SectionID, before beforeSectionID: SectionID, file: StaticString = #file, line: UInt = #line) {
         guard let removed = remove(sectionID: sectionID) else {
             specifiedSectionIsNotFound(sectionID, file: file, line: line)
         }
@@ -213,7 +213,7 @@ final class SnapshotStructure<SectionID: Hashable, ItemID: Hashable> {
         sections.insert(removed, at: sectionIndex)
     }
 
-    func move(sectionID: SectionID, after afterSectionID: SectionID, file: StaticString = #file, line: UInt = #line) {
+    mutating func move(sectionID: SectionID, after afterSectionID: SectionID, file: StaticString = #file, line: UInt = #line) {
         guard let removed = remove(sectionID: sectionID) else {
             specifiedSectionIsNotFound(sectionID, file: file, line: line)
         }
@@ -226,7 +226,7 @@ final class SnapshotStructure<SectionID: Hashable, ItemID: Hashable> {
         sections.insert(removed, at: sectionIndex)
     }
 
-    func update(sectionIDs: [SectionID]) {
+    mutating func update(sectionIDs: [SectionID]) {
         for sectionID in sectionIDs {
             guard let sectionIndex = sectionIndex(of: sectionID) else {
                 continue
@@ -250,7 +250,7 @@ private extension SnapshotStructure {
     }
 
     @discardableResult
-    func remove(itemID: ItemID) -> Item? {
+    mutating func remove(itemID: ItemID) -> Item? {
         guard let itemPosition = itemPositionMap()[itemID] else {
             return nil
         }
@@ -259,7 +259,7 @@ private extension SnapshotStructure {
     }
 
     @discardableResult
-    func remove(sectionID: SectionID) -> Section? {
+    mutating func remove(sectionID: SectionID) -> Section? {
         guard let sectionIndex = sectionIndex(of: sectionID) else {
             return nil
         }

Sources/UIKit/CollectionViewDiffableDataSource.swift

@@ -39,14 +39,18 @@ open class CollectionViewDiffableDataSource<SectionIdentifierType: Hashable, Ite
     ///   - snapshot: A snapshot object to be applied to data model.
     ///   - animatingDifferences: A Boolean value indicating whether to update with
     ///                           diffing animation.
-    public func apply(_ snapshot: DiffableDataSourceSnapshot<SectionIdentifierType, ItemIdentifierType>, animatingDifferences: Bool = true) {
+    ///   - completion: An optional completion block which is called when the complete
+    ///                 performing updates.
+    public func apply(_ snapshot: DiffableDataSourceSnapshot<SectionIdentifierType, ItemIdentifierType>, animatingDifferences: Bool = true, completion: (() -> Void)? = nil) {
         core.apply(
             snapshot,
             view: collectionView,
             animatingDifferences: animatingDifferences,
             performUpdates: { collectionView, changeset, setSections in
                 collectionView.reload(using: changeset, setData: setSections)
-        })
+        },
+            completion: completion
+        )
     }
 
     /// Returns a new snapshot object of current state.
@@ -128,6 +132,29 @@ open class CollectionViewDiffableDataSource<SectionIdentifierType: Hashable, Ite
 
         return view
     }
+
+    /// Returns whether it is possible to edit a row at given index path.
+    ///
+    /// - Parameters:
+    ///   - collectionView: A collection view instance managed by `self`.
+    ///   - section: An index of section.
+    ///
+    /// - Returns: A boolean for row at specified index path.
+    open func collectionView(_ collectionView: UICollectionView, canMoveItemAt indexPath: IndexPath) -> Bool {
+        return false
+    }
+
+    /// Moves a row at given index path.
+    ///
+    /// - Parameters:
+    ///   - collectionView: A collection view instance managed by `self`.
+    ///   - sourceIndexPath: An index path for given cell position.
+    ///   - destinationIndexPath: An index path for target cell position.
+    ///
+    /// - Returns: Void.
+    public func collectionView(_ collectionView: UICollectionView, moveItemAt sourceIndexPath: IndexPath, to destinationIndexPath: IndexPath) {
+        // Empty implementation.
+    }
 }
 
 #endif

Sources/UIKit/TableViewDiffableDataSource.swift

@@ -36,14 +36,18 @@ open class TableViewDiffableDataSource<SectionIdentifierType: Hashable, ItemIden
     ///   - snapshot: A snapshot object to be applied to data model.
     ///   - animatingDifferences: A Boolean value indicating whether to update with
     ///                           diffing animation.
-    public func apply(_ snapshot: DiffableDataSourceSnapshot<SectionIdentifierType, ItemIdentifierType>, animatingDifferences: Bool = true) {
+    ///   - completion: An optional completion block which is called when the complete
+    ///                 performing updates.
+    public func apply(_ snapshot: DiffableDataSourceSnapshot<SectionIdentifierType, ItemIdentifierType>, animatingDifferences: Bool = true, completion: (() -> Void)? = nil) {
         core.apply(
             snapshot,
             view: tableView,
             animatingDifferences: animatingDifferences,
             performUpdates: { tableView, changeset, setSections in
                 tableView.reload(using: changeset, with: self.defaultRowAnimation, setData: setSections)
-        })
+        },
+            completion: completion
+        )
     }
 
     /// Returns a new snapshot object of current state.
@@ -94,6 +98,28 @@ open class TableViewDiffableDataSource<SectionIdentifierType: Hashable, ItemIden
         return core.numberOfItems(inSection: section)
     }
 
+    /// Returns the title for the specified section's header.
+    ///
+    /// - Parameters:
+    ///   - tableView: A table view instance managed by `self`.
+    ///   - section: An index of section.
+    ///
+    /// - Returns: The title for the specified section's header, or `nil` for no title.
+    open func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
+        return nil
+    }
+
+    /// Returns the title for the specified section's footer.
+    ///
+    /// - Parameters:
+    ///   - tableView: A table view instance managed by `self`.
+    ///   - section: An index of section.
+    ///
+    /// - Returns: The title for the specified section's footer, or `nil` for no title.
+    open func tableView(_ tableView: UITableView, titleForFooterInSection section: Int) -> String? {
+        return nil
+    }
+
     /// Returns a cell for row at specified index path.
     ///
     /// - Parameters:
@@ -109,6 +135,74 @@ open class TableViewDiffableDataSource<SectionIdentifierType: Hashable, ItemIden
 
         return cell
     }
+
+    /// Returns whether it is possible to edit a row at given index path.
+    ///
+    /// - Parameters:
+    ///   - tableView: A table view instance managed by `self`.
+    ///   - section: An index of section.
+    ///
+    /// - Returns: A boolean for row at specified index path.
+    open func tableView(_ tableView: UITableView, canEditRowAt: IndexPath) -> Bool {
+        return false
+    }
+
+    /// Returns whether it is possible to move a row at given index path.
+    ///
+    /// - Parameters:
+    ///   - tableView: A table view instance managed by `self`.
+    ///   - section: An index of section.
+    ///
+    /// - Returns: A boolean for row at specified index path.
+    open func tableView(_ tableView: UITableView, canMoveRowAt _: IndexPath) -> Bool {
+        return false
+    }
+
+    /// Performs the edit action for a row at given index path.
+    ///
+    /// - Parameters:
+    ///   - tableView: A table view instance managed by `self`.
+    ///   - editingStyle: An action for given edit action.
+    ///   - indexPath: An index path for cell.
+    ///
+    /// - Returns: Void.
+    open func tableView(_ tableView: UITableView, commit _: UITableViewCell.EditingStyle, forRowAt _: IndexPath) {
+        // Empty implementation.
+    }
+
+    /// Moves a row at given index path.
+    ///
+    /// - Parameters:
+    ///   - tableView: A table view instance managed by `self`.
+    ///   - source: An index path for given cell position.
+    ///   - target: An index path for target cell position.
+    ///
+    /// - Returns: Void.
+    open func tableView(_ tableView: UITableView, moveRowAt _: IndexPath, to _: IndexPath) {
+        // Empty implementation.
+    }
+
+    /// Return list of section titles to display in section index view (e.g. "ABCD...Z#").
+    ///
+    /// - Parameters:
+    ///   - tableView: A table view instance managed by `self`.
+    ///
+    /// - Returns: The list of section titles to display.
+    open func sectionIndexTitles(for tableView: UITableView) -> [String]? {
+        return nil
+    }
+
+    /// Tell table which section corresponds to section title/index (e.g. "B",1)).
+    ///
+    /// - Parameters:
+    ///   - tableView: A table view instance managed by `self`.
+    ///   - title: The title as displayed in the section index of tableView.
+    ///   - section: An index number identifying a section title in the array returned by sectionIndexTitles(for tableView:).
+    ///
+    /// - Returns: The list of section titles to display.
+    open func tableView(_ tableView: UITableView, sectionForSectionIndexTitle _: String, at section: Int) -> Int {
+        return section
+    }
 }
 
 #endif

Tests/CocoaCollectionViewDiffableDataSourceTests.swift

@@ -20,23 +20,31 @@ final class CocoaCollectionViewDiffableDataSourceTests: XCTestCase {
             NSCollectionViewItem()
         }
 
-        let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+        var snapshot = DiffableDataSourceSnapshot<Int, Int>()
 
-        dataSource.apply(snapshot)
+        let e1 = expectation(description: "testApply() e1")
+        dataSource.apply(snapshot, completion: e1.fulfill)
+        wait(for: [e1], timeout: 1)
         XCTAssertEqual(collectionView.isPerformBatchUpdatesCalledCount, 0)
 
         snapshot.appendSections([0])
         snapshot.appendItems([0])
 
-        dataSource.apply(snapshot)
+        let e2 = expectation(description: "testApply() e2")
+        dataSource.apply(snapshot, completion: e2.fulfill)
+        wait(for: [e2], timeout: 1)
         XCTAssertEqual(collectionView.isPerformBatchUpdatesCalledCount, 1)
 
-        dataSource.apply(snapshot)
+        let e3 = expectation(description: "testApply() e3")
+        dataSource.apply(snapshot, completion: e3.fulfill)
+        wait(for: [e3], timeout: 1)
         XCTAssertEqual(collectionView.isPerformBatchUpdatesCalledCount, 1)
 
         snapshot.appendItems([1])
 
-        dataSource.apply(snapshot)
+        let e4 = expectation(description: "testApply() e4")
+        dataSource.apply(snapshot, completion: e4.fulfill)
+        wait(for: [e4], timeout: 1)
         XCTAssertEqual(collectionView.isPerformBatchUpdatesCalledCount, 2)
     }
 
@@ -50,33 +58,36 @@ final class CocoaCollectionViewDiffableDataSourceTests: XCTestCase {
         XCTAssertEqual(snapshot1.sectionIdentifiers, [])
         XCTAssertEqual(snapshot1.itemIdentifiers, [])
 
-        dataSource.snapshot().appendSections([0, 1, 2])
-        let snapshot2 = dataSource.snapshot()
-        XCTAssertEqual(snapshot2.sectionIdentifiers, [])
-        XCTAssertEqual(snapshot2.itemIdentifiers, [])
+        var snapshot2 = dataSource.snapshot()
+        snapshot2.appendSections([0, 1, 2])
 
-        let snapshotToApply = DiffableDataSourceSnapshot<Int, Int>()
+        let snapshot3 = dataSource.snapshot()
+        XCTAssertEqual(snapshot3.sectionIdentifiers, [])
+        XCTAssertEqual(snapshot3.itemIdentifiers, [])
+
+        var snapshotToApply = DiffableDataSourceSnapshot<Int, Int>()
         snapshotToApply.appendSections([0, 1, 2])
         snapshotToApply.appendItems([0, 1, 2])
         dataSource.apply(snapshotToApply)
 
-        let snapshot3 = dataSource.snapshot()
-        XCTAssertEqual(snapshot3.sectionIdentifiers, [0, 1, 2])
-        XCTAssertEqual(snapshot3.itemIdentifiers, [0, 1, 2])
-
-        dataSource.snapshot().appendSections([3, 4, 5])
-
         let snapshot4 = dataSource.snapshot()
         XCTAssertEqual(snapshot4.sectionIdentifiers, [0, 1, 2])
         XCTAssertEqual(snapshot4.itemIdentifiers, [0, 1, 2])
 
-        snapshot4.appendSections([3, 4, 5])
-        snapshot4.appendItems([3, 4, 5])
-        dataSource.apply(snapshot4)
+        var snapshot5 = dataSource.snapshot()
+        snapshot5.appendSections([3, 4, 5])
 
-        let snapshot5 = dataSource.snapshot()
-        XCTAssertEqual(snapshot5.sectionIdentifiers, [0, 1, 2, 3, 4, 5])
-        XCTAssertEqual(snapshot5.itemIdentifiers, [0, 1, 2, 3, 4, 5])
+        var snapshot6 = dataSource.snapshot()
+        XCTAssertEqual(snapshot6.sectionIdentifiers, [0, 1, 2])
+        XCTAssertEqual(snapshot6.itemIdentifiers, [0, 1, 2])
+
+        snapshot6.appendSections([3, 4, 5])
+        snapshot6.appendItems([3, 4, 5])
+        dataSource.apply(snapshot6)
+
+        let snapshot7 = dataSource.snapshot()
+        XCTAssertEqual(snapshot7.sectionIdentifiers, [0, 1, 2, 3, 4, 5])
+        XCTAssertEqual(snapshot7.itemIdentifiers, [0, 1, 2, 3, 4, 5])
     }
 
     func testItemIdentifier() {
@@ -85,7 +96,7 @@ final class CocoaCollectionViewDiffableDataSourceTests: XCTestCase {
             NSCollectionViewItem()
         }
 
-        let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+        var snapshot = DiffableDataSourceSnapshot<Int, Int>()
         snapshot.appendSections([0, 1, 2])
         snapshot.appendItems([0, 1, 2], toSection: 0)
         dataSource.apply(snapshot)
@@ -100,7 +111,7 @@ final class CocoaCollectionViewDiffableDataSourceTests: XCTestCase {
             NSCollectionViewItem()
         }
 
-        let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+        var snapshot = DiffableDataSourceSnapshot<Int, Int>()
         snapshot.appendSections([0, 1, 2])
         snapshot.appendItems([0, 1, 2], toSection: 0)
         dataSource.apply(snapshot)
@@ -117,7 +128,7 @@ final class CocoaCollectionViewDiffableDataSourceTests: XCTestCase {
 
         XCTAssertEqual(dataSource.numberOfSections(in: collectionView), 0)
 
-        let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+        var snapshot = DiffableDataSourceSnapshot<Int, Int>()
         snapshot.appendSections([0, 1, 2])
         snapshot.appendItems([0, 1, 2], toSection: 0)
         dataSource.apply(snapshot)
@@ -131,7 +142,7 @@ final class CocoaCollectionViewDiffableDataSourceTests: XCTestCase {
             NSCollectionViewItem()
         }
 
-        let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+        var snapshot = DiffableDataSourceSnapshot<Int, Int>()
         snapshot.appendSections([0, 1, 2])
         snapshot.appendItems([0, 1, 2], toSection: 0)
         dataSource.apply(snapshot)
@@ -146,7 +157,7 @@ final class CocoaCollectionViewDiffableDataSourceTests: XCTestCase {
             item
         }
 
-        let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+        var snapshot = DiffableDataSourceSnapshot<Int, Int>()
         snapshot.appendSections([0, 1, 2])
         snapshot.appendItems([0, 1, 2], toSection: 0)
         dataSource.apply(snapshot)

Tests/CollectionViewDiffableDataSourceTests.swift

@@ -20,23 +20,31 @@ final class CollectionViewDiffableDataSourceTests: XCTestCase {
             UICollectionViewCell()
         }
 
-        let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+        var snapshot = DiffableDataSourceSnapshot<Int, Int>()
 
-        dataSource.apply(snapshot)
+        let e1 = expectation(description: "testApply() e1")
+        dataSource.apply(snapshot, completion: e1.fulfill)
+        wait(for: [e1], timeout: 1)
         XCTAssertEqual(collectionView.isPerformBatchUpdatesCalledCount, 0)
 
         snapshot.appendSections([0])
         snapshot.appendItems([0])
 
-        dataSource.apply(snapshot)
+        let e2 = expectation(description: "testApply() e2")
+        dataSource.apply(snapshot, completion: e2.fulfill)
+        wait(for: [e2], timeout: 1)
         XCTAssertEqual(collectionView.isPerformBatchUpdatesCalledCount, 1)
 
-        dataSource.apply(snapshot)
+        let e3 = expectation(description: "testApply() e3")
+        dataSource.apply(snapshot, completion: e3.fulfill)
+        wait(for: [e3], timeout: 1)
         XCTAssertEqual(collectionView.isPerformBatchUpdatesCalledCount, 1)
 
         snapshot.appendItems([1])
 
-        dataSource.apply(snapshot)
+        let e4 = expectation(description: "testApply() e4")
+        dataSource.apply(snapshot, completion: e4.fulfill)
+        wait(for: [e4], timeout: 1)
         XCTAssertEqual(collectionView.isPerformBatchUpdatesCalledCount, 2)
     }
 
@@ -50,33 +58,36 @@ final class CollectionViewDiffableDataSourceTests: XCTestCase {
         XCTAssertEqual(snapshot1.sectionIdentifiers, [])
         XCTAssertEqual(snapshot1.itemIdentifiers, [])
 
-        dataSource.snapshot().appendSections([0, 1, 2])
-        let snapshot2 = dataSource.snapshot()
-        XCTAssertEqual(snapshot2.sectionIdentifiers, [])
-        XCTAssertEqual(snapshot2.itemIdentifiers, [])
+        var snapshot2 = dataSource.snapshot()
+        snapshot2.appendSections([0, 1, 2])
 
-        let snapshotToApply = DiffableDataSourceSnapshot<Int, Int>()
+        let snapshot3 = dataSource.snapshot()
+        XCTAssertEqual(snapshot3.sectionIdentifiers, [])
+        XCTAssertEqual(snapshot3.itemIdentifiers, [])
+
+        var snapshotToApply = DiffableDataSourceSnapshot<Int, Int>()
         snapshotToApply.appendSections([0, 1, 2])
         snapshotToApply.appendItems([0, 1, 2])
         dataSource.apply(snapshotToApply)
 
-        let snapshot3 = dataSource.snapshot()
-        XCTAssertEqual(snapshot3.sectionIdentifiers, [0, 1, 2])
-        XCTAssertEqual(snapshot3.itemIdentifiers, [0, 1, 2])
-
-        dataSource.snapshot().appendSections([3, 4, 5])
-
         let snapshot4 = dataSource.snapshot()
         XCTAssertEqual(snapshot4.sectionIdentifiers, [0, 1, 2])
         XCTAssertEqual(snapshot4.itemIdentifiers, [0, 1, 2])
 
-        snapshot4.appendSections([3, 4, 5])
-        snapshot4.appendItems([3, 4, 5])
-        dataSource.apply(snapshot4)
+        var snapshot5 = dataSource.snapshot()
+        snapshot5.appendSections([3, 4, 5])
 
-        let snapshot5 = dataSource.snapshot()
-        XCTAssertEqual(snapshot5.sectionIdentifiers, [0, 1, 2, 3, 4, 5])
-        XCTAssertEqual(snapshot5.itemIdentifiers, [0, 1, 2, 3, 4, 5])
+        var snapshot6 = dataSource.snapshot()
+        XCTAssertEqual(snapshot6.sectionIdentifiers, [0, 1, 2])
+        XCTAssertEqual(snapshot6.itemIdentifiers, [0, 1, 2])
+
+        snapshot6.appendSections([3, 4, 5])
+        snapshot6.appendItems([3, 4, 5])
+        dataSource.apply(snapshot6)
+
+        let snapshot7 = dataSource.snapshot()
+        XCTAssertEqual(snapshot7.sectionIdentifiers, [0, 1, 2, 3, 4, 5])
+        XCTAssertEqual(snapshot7.itemIdentifiers, [0, 1, 2, 3, 4, 5])
     }
 
     func testItemIdentifier() {
@@ -85,7 +96,7 @@ final class CollectionViewDiffableDataSourceTests: XCTestCase {
             UICollectionViewCell()
         }
 
-        let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+        var snapshot = DiffableDataSourceSnapshot<Int, Int>()
         snapshot.appendSections([0, 1, 2])
         snapshot.appendItems([0, 1, 2], toSection: 0)
         dataSource.apply(snapshot)
@@ -100,7 +111,7 @@ final class CollectionViewDiffableDataSourceTests: XCTestCase {
             UICollectionViewCell()
         }
 
-        let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+        var snapshot = DiffableDataSourceSnapshot<Int, Int>()
         snapshot.appendSections([0, 1, 2])
         snapshot.appendItems([0, 1, 2], toSection: 0)
         dataSource.apply(snapshot)
@@ -117,7 +128,7 @@ final class CollectionViewDiffableDataSourceTests: XCTestCase {
 
         XCTAssertEqual(dataSource.numberOfSections(in: collectionView), 0)
 
-        let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+        var snapshot = DiffableDataSourceSnapshot<Int, Int>()
         snapshot.appendSections([0, 1, 2])
         snapshot.appendItems([0, 1, 2], toSection: 0)
         dataSource.apply(snapshot)
@@ -131,7 +142,7 @@ final class CollectionViewDiffableDataSourceTests: XCTestCase {
             UICollectionViewCell()
         }
 
-        let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+        var snapshot = DiffableDataSourceSnapshot<Int, Int>()
         snapshot.appendSections([0, 1, 2])
         snapshot.appendItems([0, 1, 2], toSection: 0)
         dataSource.apply(snapshot)
@@ -146,7 +157,7 @@ final class CollectionViewDiffableDataSourceTests: XCTestCase {
             cell
         }
 
-        let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+        var snapshot = DiffableDataSourceSnapshot<Int, Int>()
         snapshot.appendSections([0, 1, 2])
         snapshot.appendItems([0, 1, 2], toSection: 0)
         dataSource.apply(snapshot)
@@ -156,6 +167,24 @@ final class CollectionViewDiffableDataSourceTests: XCTestCase {
             cell
         )
     }
+
+    func testCanMoveRowAt() {
+        let collectionView = MockCollectionView()
+        let cell = UICollectionViewCell()
+        let dataSource = CollectionViewDiffableDataSource<Int, Int>(collectionView: collectionView) { _, _, _ in
+            cell
+        }
+
+        var snapshot = DiffableDataSourceSnapshot<Int, Int>()
+        snapshot.appendSections([0, 1, 2])
+        snapshot.appendItems([0, 1, 2], toSection: 0)
+        dataSource.apply(snapshot)
+
+        XCTAssertEqual(
+            dataSource.collectionView(collectionView, canMoveItemAt: IndexPath(item: 1, section: 0)),
+            false
+        )
+    }
 }
 
 final class MockCollectionView: UICollectionView {

Tests/DiffableDataSourceTests.swift

@@ -16,7 +16,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections(test.initial)
             snapshot.appendSections(test.append)
             XCTAssertEqual(snapshot.sectionIdentifiers, test.expected)
@@ -33,7 +33,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections(test.initial)
             snapshot.appendSections(test.append)
             XCTAssertEqual(snapshot.sectionIdentifiers, test.expected)
@@ -51,7 +51,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections(test.initial)
             snapshot.insertSections(test.insert, beforeSection: test.before)
             XCTAssertEqual(snapshot.sectionIdentifiers, test.expected)
@@ -67,7 +67,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections(test.initial)
             snapshot.insertSections(test.insert, beforeSection: test.before)
             XCTAssertEqual(snapshot.sectionIdentifiers, test.expected)
@@ -86,7 +86,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections(test.initial)
             snapshot.insertSections(test.insert, afterSection: test.after)
             XCTAssertEqual(snapshot.sectionIdentifiers, test.expected)
@@ -102,7 +102,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections(test.initial)
             snapshot.insertSections(test.insert, afterSection: test.after)
             XCTAssertEqual(snapshot.sectionIdentifiers, test.expected)
@@ -122,7 +122,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections(test.initial)
             snapshot.deleteSections(test.delete)
             XCTAssertEqual(snapshot.sectionIdentifiers, test.expected)
@@ -140,7 +140,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections(test.initial)
             snapshot.moveSection(test.move, beforeSection: test.before)
             XCTAssertEqual(snapshot.sectionIdentifiers, test.expected)
@@ -158,7 +158,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections(test.initial)
             snapshot.moveSection(test.move, afterSection: test.after)
             XCTAssertEqual(snapshot.sectionIdentifiers, test.expected)
@@ -194,7 +194,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections(test.initial)
             snapshot.reloadSections(test.reload)
             XCTAssertEqual(snapshot.sectionIdentifiers, test.initial)
@@ -213,7 +213,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections([0, 1])
             snapshot.appendItems(test.initial)
             snapshot.appendItems(test.append)
@@ -231,7 +231,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections([0, 1])
             snapshot.appendItems(test.initial)
             snapshot.appendItems(test.append)
@@ -253,7 +253,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             for (section, items) in test.initial.enumerated() {
                 snapshot.appendSections([section])
                 snapshot.appendItems(items)
@@ -276,7 +276,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             for (section, items) in test.initial.enumerated() {
                 snapshot.appendSections([section])
                 snapshot.appendItems(items)
@@ -302,7 +302,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections([0, 1])
             snapshot.appendItems(test.initial)
             snapshot.insertItems(test.insert, beforeItem: test.before)
@@ -320,7 +320,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections([0, 1])
             snapshot.appendItems(test.initial)
             snapshot.insertItems(test.insert, beforeItem: test.before)
@@ -341,7 +341,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections([0, 1])
             snapshot.appendItems(test.initial)
             snapshot.insertItems(test.insert, afterItem: test.after)
@@ -359,7 +359,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections([0, 1])
             snapshot.appendItems(test.initial)
             snapshot.insertItems(test.insert, afterItem: test.after)
@@ -382,7 +382,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             for (section, items) in test.initial.enumerated() {
                 snapshot.appendSections([section])
                 snapshot.appendItems(items, toSection: section)
@@ -409,7 +409,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             for (section, items) in test.enumerated() {
                 snapshot.appendSections([section])
                 snapshot.appendItems(items, toSection: section)
@@ -435,7 +435,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             for (section, items) in test.initial.enumerated() {
                 snapshot.appendSections([section])
                 snapshot.appendItems(items, toSection: section)
@@ -463,7 +463,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             for (section, items) in test.initial.enumerated() {
                 snapshot.appendSections([section])
                 snapshot.appendItems(items, toSection: section)
@@ -539,7 +539,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             for (section, items) in test.initial.enumerated() {
                 snapshot.appendSections([section])
                 snapshot.appendItems(items, toSection: section)
@@ -564,7 +564,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             for (section, items) in test.initial.enumerated() {
                 snapshot.appendSections([section])
                 snapshot.appendItems(items, toSection: section)
@@ -583,7 +583,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             for (section, items) in test.initial.enumerated() {
                 snapshot.appendSections([section])
                 snapshot.appendItems(items, toSection: section)
@@ -602,7 +602,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections(test.initial)
 
             XCTAssertEqual(snapshot.numberOfSections, test.expected)
@@ -618,7 +618,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections(test.initial)
 
             XCTAssertEqual(snapshot.numberOfSections, test.expected)
@@ -636,7 +636,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             for (section, items) in test.initial.enumerated() {
                 snapshot.appendSections([section])
                 snapshot.appendItems(items, toSection: section)
@@ -655,7 +655,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             for (section, items) in test.initial.enumerated() {
                 snapshot.appendSections([section])
                 snapshot.appendItems(items, toSection: section)
@@ -674,7 +674,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections(test.initial)
 
             XCTAssertEqual(snapshot.sectionIdentifiers, test.expected)
@@ -690,7 +690,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections(test.initial)
 
             XCTAssertEqual(snapshot.sectionIdentifiers, test.expected)
@@ -708,7 +708,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             for (section, items) in test.initial.enumerated() {
                 snapshot.appendSections([section])
                 snapshot.appendItems(items, toSection: section)
@@ -727,7 +727,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             for (section, items) in test.initial.enumerated() {
                 snapshot.appendSections([section])
                 snapshot.appendItems(items, toSection: section)
@@ -748,7 +748,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             for (section, items) in test.initial.enumerated() {
                 snapshot.appendSections([section])
                 snapshot.appendItems(items, toSection: section)
@@ -767,7 +767,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             for (section, items) in test.initial.enumerated() {
                 snapshot.appendSections([section])
                 snapshot.appendItems(items, toSection: section)
@@ -789,7 +789,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             for (section, items) in test.initial.enumerated() {
                 snapshot.appendSections([section])
                 snapshot.appendItems(items, toSection: section)
@@ -808,7 +808,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             for (section, items) in test.initial.enumerated() {
                 snapshot.appendSections([section])
                 snapshot.appendItems(items, toSection: section)
@@ -830,7 +830,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             for (section, items) in test.initial.enumerated() {
                 snapshot.appendSections([section])
                 snapshot.appendItems(items, toSection: section)
@@ -849,7 +849,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             for (section, items) in test.initial.enumerated() {
                 snapshot.appendSections([section])
                 snapshot.appendItems(items, toSection: section)
@@ -870,7 +870,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections(test.initial)
 
             XCTAssertEqual(snapshot.indexOfSection(test.section), test.expectedIndex)
@@ -886,7 +886,7 @@ final class DiffableDataSourceSnapshotTests: XCTestCase {
         ]
 
         for test in tests {
-            let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+            var snapshot = DiffableDataSourceSnapshot<Int, Int>()
             snapshot.appendSections(test.initial)
 
             XCTAssertEqual(snapshot.indexOfSection(test.section), test.expectedIndex)

Tests/TableViewDiffableDataSourceTests.swift

@@ -20,23 +20,31 @@ final class TableViewDiffableDataSourceTests: XCTestCase {
             UITableViewCell()
         }
 
-        let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+        var snapshot = DiffableDataSourceSnapshot<Int, Int>()
 
-        dataSource.apply(snapshot)
+        let e1 = expectation(description: "testApply() e1")
+        dataSource.apply(snapshot, completion: e1.fulfill)
+        wait(for: [e1], timeout: 1)
         XCTAssertEqual(tableView.isPerformBatchUpdatesCalledCount, 0)
 
         snapshot.appendSections([0])
         snapshot.appendItems([0])
 
-        dataSource.apply(snapshot)
+        let e2 = expectation(description: "testApply() e2")
+        dataSource.apply(snapshot, completion: e2.fulfill)
+        wait(for: [e2], timeout: 1)
         XCTAssertEqual(tableView.isPerformBatchUpdatesCalledCount, 1)
 
-        dataSource.apply(snapshot)
+        let e3 = expectation(description: "testApply() e3")
+        dataSource.apply(snapshot, completion: e3.fulfill)
+        wait(for: [e3], timeout: 1)
         XCTAssertEqual(tableView.isPerformBatchUpdatesCalledCount, 1)
 
         snapshot.appendItems([1])
 
-        dataSource.apply(snapshot)
+        let e4 = expectation(description: "testApply() e4")
+        dataSource.apply(snapshot, completion: e4.fulfill)
+        wait(for: [e4], timeout: 1)
         XCTAssertEqual(tableView.isPerformBatchUpdatesCalledCount, 2)
     }
 
@@ -50,33 +58,36 @@ final class TableViewDiffableDataSourceTests: XCTestCase {
         XCTAssertEqual(snapshot1.sectionIdentifiers, [])
         XCTAssertEqual(snapshot1.itemIdentifiers, [])
 
-        dataSource.snapshot().appendSections([0, 1, 2])
-        let snapshot2 = dataSource.snapshot()
-        XCTAssertEqual(snapshot2.sectionIdentifiers, [])
-        XCTAssertEqual(snapshot2.itemIdentifiers, [])
+        var snapshot2 = dataSource.snapshot()
+        snapshot2.appendSections([0, 1, 2])
 
-        let snapshotToApply = DiffableDataSourceSnapshot<Int, Int>()
+        let snapshot3 = dataSource.snapshot()
+        XCTAssertEqual(snapshot3.sectionIdentifiers, [])
+        XCTAssertEqual(snapshot3.itemIdentifiers, [])
+
+        var snapshotToApply = DiffableDataSourceSnapshot<Int, Int>()
         snapshotToApply.appendSections([0, 1, 2])
         snapshotToApply.appendItems([0, 1, 2])
         dataSource.apply(snapshotToApply)
 
-        let snapshot3 = dataSource.snapshot()
-        XCTAssertEqual(snapshot3.sectionIdentifiers, [0, 1, 2])
-        XCTAssertEqual(snapshot3.itemIdentifiers, [0, 1, 2])
-
-        dataSource.snapshot().appendSections([3, 4, 5])
-
         let snapshot4 = dataSource.snapshot()
         XCTAssertEqual(snapshot4.sectionIdentifiers, [0, 1, 2])
         XCTAssertEqual(snapshot4.itemIdentifiers, [0, 1, 2])
 
-        snapshot4.appendSections([3, 4, 5])
-        snapshot4.appendItems([3, 4, 5])
-        dataSource.apply(snapshot4)
+        var snapshot5 = dataSource.snapshot()
+        snapshot5.appendSections([3, 4, 5])
 
-        let snapshot5 = dataSource.snapshot()
-        XCTAssertEqual(snapshot5.sectionIdentifiers, [0, 1, 2, 3, 4, 5])
-        XCTAssertEqual(snapshot5.itemIdentifiers, [0, 1, 2, 3, 4, 5])
+        var snapshot6 = dataSource.snapshot()
+        XCTAssertEqual(snapshot6.sectionIdentifiers, [0, 1, 2])
+        XCTAssertEqual(snapshot6.itemIdentifiers, [0, 1, 2])
+
+        snapshot6.appendSections([3, 4, 5])
+        snapshot6.appendItems([3, 4, 5])
+        dataSource.apply(snapshot6)
+
+        let snapshot7 = dataSource.snapshot()
+        XCTAssertEqual(snapshot7.sectionIdentifiers, [0, 1, 2, 3, 4, 5])
+        XCTAssertEqual(snapshot7.itemIdentifiers, [0, 1, 2, 3, 4, 5])
     }
 
     func testItemIdentifier() {
@@ -85,7 +96,7 @@ final class TableViewDiffableDataSourceTests: XCTestCase {
             UITableViewCell()
         }
 
-        let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+        var snapshot = DiffableDataSourceSnapshot<Int, Int>()
         snapshot.appendSections([0, 1, 2])
         snapshot.appendItems([0, 1, 2], toSection: 0)
         dataSource.apply(snapshot)
@@ -100,7 +111,7 @@ final class TableViewDiffableDataSourceTests: XCTestCase {
             UITableViewCell()
         }
 
-        let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+        var snapshot = DiffableDataSourceSnapshot<Int, Int>()
         snapshot.appendSections([0, 1, 2])
         snapshot.appendItems([0, 1, 2], toSection: 0)
         dataSource.apply(snapshot)
@@ -117,7 +128,7 @@ final class TableViewDiffableDataSourceTests: XCTestCase {
 
         XCTAssertEqual(dataSource.numberOfSections(in: tableView), 0)
 
-        let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+        var snapshot = DiffableDataSourceSnapshot<Int, Int>()
         snapshot.appendSections([0, 1, 2])
         snapshot.appendItems([0, 1, 2], toSection: 0)
         dataSource.apply(snapshot)
@@ -131,7 +142,7 @@ final class TableViewDiffableDataSourceTests: XCTestCase {
             UITableViewCell()
         }
 
-        let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+        var snapshot = DiffableDataSourceSnapshot<Int, Int>()
         snapshot.appendSections([0, 1, 2])
         snapshot.appendItems([0, 1, 2], toSection: 0)
         dataSource.apply(snapshot)
@@ -146,7 +157,7 @@ final class TableViewDiffableDataSourceTests: XCTestCase {
             cell
         }
 
-        let snapshot = DiffableDataSourceSnapshot<Int, Int>()
+        var snapshot = DiffableDataSourceSnapshot<Int, Int>()
         snapshot.appendSections([0, 1, 2])
         snapshot.appendItems([0, 1, 2], toSection: 0)
         dataSource.apply(snapshot)
@@ -156,6 +167,42 @@ final class TableViewDiffableDataSourceTests: XCTestCase {
             cell
         )
     }
+
+    func testCanEditRowAt() {
+        let tableView = MockTableView()
+        let cell = UITableViewCell()
+        let dataSource = TableViewDiffableDataSource<Int, Int>(tableView: tableView) { _, _, _ in
+            cell
+        }
+
+        var snapshot = DiffableDataSourceSnapshot<Int, Int>()
+        snapshot.appendSections([0, 1, 2])
+        snapshot.appendItems([0, 1, 2], toSection: 0)
+        dataSource.apply(snapshot)
+
+        XCTAssertEqual(
+            dataSource.tableView(tableView, canEditRowAt: IndexPath(item: 1, section: 0)),
+            false
+        )
+    }
+
+    func testCanMoveRowAt() {
+        let tableView = MockTableView()
+        let cell = UITableViewCell()
+        let dataSource = TableViewDiffableDataSource<Int, Int>(tableView: tableView) { _, _, _ in
+            cell
+        }
+
+        var snapshot = DiffableDataSourceSnapshot<Int, Int>()
+        snapshot.appendSections([0, 1, 2])
+        snapshot.appendItems([0, 1, 2], toSection: 0)
+        dataSource.apply(snapshot)
+
+        XCTAssertEqual(
+            dataSource.tableView(tableView, canMoveRowAt: IndexPath(item: 1, section: 0)),
+            false
+        )
+    }
 }
 
 final class MockTableView: UITableView {

XCConfigs/DiffableDataSources.xcconfig

@@ -5,11 +5,11 @@ TVOS_DEPLOYMENT_TARGET = 9.0
 SDKROOT = 
 SUPPORTED_PLATFORMS = macosx iphoneos iphonesimulator appletvos appletvsimulator
 TARGETED_DEVICE_FAMILY = 1,2,3
-VALID_ARCHS[sdk=macosx*] = i386 x86_64
+VALID_ARCHS[sdk=macosx*] = arm64 i386 x86_64
 VALID_ARCHS[sdk=iphoneos*] = arm64 armv7 armv7s
-VALID_ARCHS[sdk=iphonesimulator*] = i386 x86_64
+VALID_ARCHS[sdk=iphonesimulator*] = arm64 i386 x86_64
 VALID_ARCHS[sdk=appletv*] = arm64
-VALID_ARCHS[sdk=appletvsimulator*] = x86_64
+VALID_ARCHS[sdk=appletvsimulator*] = arm64 x86_64
 
 CODE_SIGN_IDENTITY =
 CODE_SIGN_STYLE = Manual

azure-pipelines.yml

@@ -10,6 +10,8 @@ jobs:
     matrix:
       xcode10_2:
         DEVELOPER_DIR: /Applications/Xcode_10.2.app
+      xcode11_2_1:
+        DEVELOPER_DIR: /Applications/Xcode_11.2.1.app
   steps:
     - checkout: self
       submodules: true
@@ -20,11 +22,11 @@ jobs:
        set -o pipefail &&
        xcodebuild build-for-testing test-without-building -workspace DiffableDataSources.xcworkspace -scheme DiffableDataSources -configuration Release ENABLE_TESTABILITY=YES |
        xcpretty -c -r junit -o build/reports/xcodebuild-macOS.xml
-      displayName: xcodebuild test maxOS
+      displayName: xcodebuild test macOS
       condition: succeededOrFailed()
     - script: |
         set -o pipefail &&
-        xcodebuild build-for-testing test-without-building -workspace DiffableDataSources.xcworkspace -scheme DiffableDataSources -configuration Release -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone Xs' ENABLE_TESTABILITY=YES |
+        xcodebuild build-for-testing test-without-building -workspace DiffableDataSources.xcworkspace -scheme DiffableDataSources -configuration Release -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone 8' ENABLE_TESTABILITY=YES |
         xcpretty -c -r junit -o build/reports/xcodebuild-iOS.xml
       displayName: xcodebuild test iOS
       condition: succeededOrFailed()

docs/Classes/CollectionViewDiffableDataSource.html

@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           DiffableDataSources Docs
         </a>
-         (100% documented)
+         (98% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -65,7 +65,7 @@
             <a class="nav-group-name-link" href="../Snapshot.html">Snapshot</a>
             <ul class="nav-group-tasks">
               <li class="nav-group-task">
-                <a class="nav-group-task-link" href="../Classes/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a>
+                <a class="nav-group-task-link" href="../Structs/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a>
               </li>
             </ul>
           </li>
@@ -167,7 +167,7 @@ changes with automatic diffing.</p>
                         <h4>Declaration</h4>
                         <div class="language">
                           <p class="aside-title">Swift</p>
-                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">var</span> <span class="nv">supplementaryViewProvider</span><span class="p">:</span> <span class="kt">CollectionViewDiffableDataSource</span><span class="o">&lt;</span><span class="kt">SectionIdentifierType</span><span class="p">,</span> <span class="kt">ItemIdentifierType</span><span class="o">&gt;.</span><span class="kt"><a href="../Classes/CollectionViewDiffableDataSource.html#/s:19DiffableDataSources014CollectionViewaB6SourceC013SupplementaryE8Providera">SupplementaryViewProvider</a></span><span class="p">?</span></code></pre>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">var</span> <span class="nv">supplementaryViewProvider</span><span class="p">:</span> <span class="kt"><a href="../Classes/CollectionViewDiffableDataSource.html#/s:19DiffableDataSources014CollectionViewaB6SourceC013SupplementaryE8Providera">SupplementaryViewProvider</a></span><span class="p">?</span></code></pre>
 
                         </div>
                       </div>
@@ -235,9 +235,9 @@ changes with automatic diffing.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources014CollectionViewaB6SourceC5apply_20animatingDifferencesyAA0abF8SnapshotCyxq_G_SbtF"></a>
-                    <a name="//apple_ref/swift/Method/apply(_:animatingDifferences:)" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources014CollectionViewaB6SourceC5apply_20animatingDifferencesyAA0abF8SnapshotCyxq_G_SbtF">apply(_:animatingDifferences:)</a>
+                    <a name="/s:19DiffableDataSources014CollectionViewaB6SourceC5apply_20animatingDifferences10completionyAA0abF8SnapshotVyxq_G_SbyycSgtF"></a>
+                    <a name="//apple_ref/swift/Method/apply(_:animatingDifferences:completion:)" class="dashAnchor"></a>
+                    <a class="token" href="#/s:19DiffableDataSources014CollectionViewaB6SourceC5apply_20animatingDifferences10completionyAA0abF8SnapshotVyxq_G_SbyycSgtF">apply(_:animatingDifferences:completion:)</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -252,7 +252,7 @@ changes with automatic diffing.</p>
                         <h4>Declaration</h4>
                         <div class="language">
                           <p class="aside-title">Swift</p>
-                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">apply</span><span class="p">(</span><span class="n">_</span> <span class="nv">snapshot</span><span class="p">:</span> <span class="kt"><a href="../Classes/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a></span><span class="o">&lt;</span><span class="kt">SectionIdentifierType</span><span class="p">,</span> <span class="kt">ItemIdentifierType</span><span class="o">&gt;</span><span class="p">,</span> <span class="nv">animatingDifferences</span><span class="p">:</span> <span class="kt">Bool</span> <span class="o">=</span> <span class="kc">true</span><span class="p">)</span></code></pre>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">apply</span><span class="p">(</span><span class="n">_</span> <span class="nv">snapshot</span><span class="p">:</span> <span class="kt"><a href="../Structs/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a></span><span class="o">&lt;</span><span class="kt">SectionIdentifierType</span><span class="p">,</span> <span class="kt">ItemIdentifierType</span><span class="o">&gt;</span><span class="p">,</span> <span class="nv">animatingDifferences</span><span class="p">:</span> <span class="kt">Bool</span> <span class="o">=</span> <span class="kc">true</span><span class="p">,</span> <span class="nv">completion</span><span class="p">:</span> <span class="p">(()</span> <span class="o">-&gt;</span> <span class="kt">Void</span><span class="p">)?</span> <span class="o">=</span> <span class="kc">nil</span><span class="p">)</span></code></pre>
 
                         </div>
                       </div>
@@ -285,6 +285,19 @@ changes with automatic diffing.</p>
                                 </div>
                               </td>
                             </tr>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>completion</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>An optional completion block which is called when the complete
+        performing updates.</p>
+                                </div>
+                              </td>
+                            </tr>
                           </tbody>
                         </table>
                       </div>
@@ -294,9 +307,9 @@ changes with automatic diffing.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources014CollectionViewaB6SourceC8snapshotAA0abF8SnapshotCyxq_GyF"></a>
+                    <a name="/s:19DiffableDataSources014CollectionViewaB6SourceC8snapshotAA0abF8SnapshotVyxq_GyF"></a>
                     <a name="//apple_ref/swift/Method/snapshot()" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources014CollectionViewaB6SourceC8snapshotAA0abF8SnapshotCyxq_GyF">snapshot()</a>
+                    <a class="token" href="#/s:19DiffableDataSources014CollectionViewaB6SourceC8snapshotAA0abF8SnapshotVyxq_GyF">snapshot()</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -311,7 +324,7 @@ changes with automatic diffing.</p>
                         <h4>Declaration</h4>
                         <div class="language">
                           <p class="aside-title">Swift</p>
-                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">snapshot</span><span class="p">()</span> <span class="o">-&gt;</span> <span class="kt"><a href="../Classes/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a></span><span class="o">&lt;</span><span class="kt">SectionIdentifierType</span><span class="p">,</span> <span class="kt">ItemIdentifierType</span><span class="o">&gt;</span></code></pre>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">snapshot</span><span class="p">()</span> <span class="o">-&gt;</span> <span class="kt"><a href="../Structs/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a></span><span class="o">&lt;</span><span class="kt">SectionIdentifierType</span><span class="p">,</span> <span class="kt">ItemIdentifierType</span><span class="o">&gt;</span></code></pre>
 
                         </div>
                       </div>
@@ -670,6 +683,142 @@ changes with automatic diffing.</p>
                     </section>
                   </div>
                 </li>
+                <li class="item">
+                  <div>
+                    <code>
+                    <a name="/s:19DiffableDataSources014CollectionViewaB6SourceC010collectionE0_13canMoveItemAtSbSo012UICollectionE0C_10Foundation9IndexPathVtF"></a>
+                    <a name="//apple_ref/swift/Method/collectionView(_:canMoveItemAt:)" class="dashAnchor"></a>
+                    <a class="token" href="#/s:19DiffableDataSources014CollectionViewaB6SourceC010collectionE0_13canMoveItemAtSbSo012UICollectionE0C_10Foundation9IndexPathVtF">collectionView(_:canMoveItemAt:)</a>
+                    </code>
+                  </div>
+                  <div class="height-container">
+                    <div class="pointer-container"></div>
+                    <section class="section">
+                      <div class="pointer"></div>
+                      <div class="abstract">
+                        <p>Returns whether it is possible to edit a row at given index path.</p>
+
+                      </div>
+                      <div class="declaration">
+                        <h4>Declaration</h4>
+                        <div class="language">
+                          <p class="aside-title">Swift</p>
+                          <pre class="highlight swift"><code><span class="kd">open</span> <span class="kd">func</span> <span class="nf">collectionView</span><span class="p">(</span><span class="n">_</span> <span class="nv">collectionView</span><span class="p">:</span> <span class="kt">UICollectionView</span><span class="p">,</span> <span class="n">canMoveItemAt</span> <span class="nv">indexPath</span><span class="p">:</span> <span class="kt">IndexPath</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">Bool</span></code></pre>
+
+                        </div>
+                      </div>
+                      <div>
+                        <h4>Parameters</h4>
+                        <table class="graybox">
+                          <tbody>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>collectionView</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>A collection view instance managed by <code>self</code>.</p>
+                                </div>
+                              </td>
+                            </tr>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>section</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>An index of section.</p>
+                                </div>
+                              </td>
+                            </tr>
+                          </tbody>
+                        </table>
+                      </div>
+                      <div>
+                        <h4>Return Value</h4>
+                        <p>A boolean for row at specified index path.</p>
+                      </div>
+                    </section>
+                  </div>
+                </li>
+                <li class="item">
+                  <div>
+                    <code>
+                    <a name="/s:19DiffableDataSources014CollectionViewaB6SourceC010collectionE0_10moveItemAt2toySo012UICollectionE0C_10Foundation9IndexPathVAKtF"></a>
+                    <a name="//apple_ref/swift/Method/collectionView(_:moveItemAt:to:)" class="dashAnchor"></a>
+                    <a class="token" href="#/s:19DiffableDataSources014CollectionViewaB6SourceC010collectionE0_10moveItemAt2toySo012UICollectionE0C_10Foundation9IndexPathVAKtF">collectionView(_:moveItemAt:to:)</a>
+                    </code>
+                  </div>
+                  <div class="height-container">
+                    <div class="pointer-container"></div>
+                    <section class="section">
+                      <div class="pointer"></div>
+                      <div class="abstract">
+                        <p>Moves a row at given index path.</p>
+
+                      </div>
+                      <div class="declaration">
+                        <h4>Declaration</h4>
+                        <div class="language">
+                          <p class="aside-title">Swift</p>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">collectionView</span><span class="p">(</span><span class="n">_</span> <span class="nv">collectionView</span><span class="p">:</span> <span class="kt">UICollectionView</span><span class="p">,</span> <span class="n">moveItemAt</span> <span class="nv">sourceIndexPath</span><span class="p">:</span> <span class="kt">IndexPath</span><span class="p">,</span> <span class="n">to</span> <span class="nv">destinationIndexPath</span><span class="p">:</span> <span class="kt">IndexPath</span><span class="p">)</span></code></pre>
+
+                        </div>
+                      </div>
+                      <div>
+                        <h4>Parameters</h4>
+                        <table class="graybox">
+                          <tbody>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>collectionView</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>A collection view instance managed by <code>self</code>.</p>
+                                </div>
+                              </td>
+                            </tr>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>sourceIndexPath</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>An index path for given cell position.</p>
+                                </div>
+                              </td>
+                            </tr>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>destinationIndexPath</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>An index path for target cell position.</p>
+                                </div>
+                              </td>
+                            </tr>
+                          </tbody>
+                        </table>
+                      </div>
+                      <div>
+                        <h4>Return Value</h4>
+                        <p>Void.</p>
+                      </div>
+                    </section>
+                  </div>
+                </li>
               </ul>
             </div>
           </div>
@@ -678,8 +827,8 @@ changes with automatic diffing.</p>
       </article>
     </div>
     <section class="footer">
-      <p>&copy; 2019 <a class="link" href="https://github.com/ra1028" target="_blank" rel="external">Ryo Aoyama</a>. All rights reserved. (Last updated: 2019-06-24)</p>
-      <p>Generated by <a class="link" href="https://github.com/realm/jazzy" target="_blank" rel="external">jazzy ♪♫ v0.9.4</a>, a <a class="link" href="https://realm.io" target="_blank" rel="external">Realm</a> project.</p>
+      <p>&copy; 2021 <a class="link" href="https://github.com/ra1028" target="_blank" rel="external">Ryo Aoyama</a>. All rights reserved. (Last updated: 2021-06-09)</p>
+      <p>Generated by <a class="link" href="https://github.com/realm/jazzy" target="_blank" rel="external">jazzy ♪♫ v0.11.2</a>, a <a class="link" href="https://realm.io" target="_blank" rel="external">Realm</a> project.</p>
     </section>
   </body>
 </div>

docs/Classes/TableViewDiffableDataSource.html

@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           DiffableDataSources Docs
         </a>
-         (100% documented)
+         (98% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -65,7 +65,7 @@
             <a class="nav-group-name-link" href="../Snapshot.html">Snapshot</a>
             <ul class="nav-group-tasks">
               <li class="nav-group-task">
-                <a class="nav-group-task-link" href="../Classes/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a>
+                <a class="nav-group-task-link" href="../Structs/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a>
               </li>
             </ul>
           </li>
@@ -208,9 +208,9 @@ changes with automatic diffing.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources09TableViewaB6SourceC5apply_20animatingDifferencesyAA0abF8SnapshotCyxq_G_SbtF"></a>
-                    <a name="//apple_ref/swift/Method/apply(_:animatingDifferences:)" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources09TableViewaB6SourceC5apply_20animatingDifferencesyAA0abF8SnapshotCyxq_G_SbtF">apply(_:animatingDifferences:)</a>
+                    <a name="/s:19DiffableDataSources09TableViewaB6SourceC5apply_20animatingDifferences10completionyAA0abF8SnapshotVyxq_G_SbyycSgtF"></a>
+                    <a name="//apple_ref/swift/Method/apply(_:animatingDifferences:completion:)" class="dashAnchor"></a>
+                    <a class="token" href="#/s:19DiffableDataSources09TableViewaB6SourceC5apply_20animatingDifferences10completionyAA0abF8SnapshotVyxq_G_SbyycSgtF">apply(_:animatingDifferences:completion:)</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -225,7 +225,7 @@ changes with automatic diffing.</p>
                         <h4>Declaration</h4>
                         <div class="language">
                           <p class="aside-title">Swift</p>
-                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">apply</span><span class="p">(</span><span class="n">_</span> <span class="nv">snapshot</span><span class="p">:</span> <span class="kt"><a href="../Classes/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a></span><span class="o">&lt;</span><span class="kt">SectionIdentifierType</span><span class="p">,</span> <span class="kt">ItemIdentifierType</span><span class="o">&gt;</span><span class="p">,</span> <span class="nv">animatingDifferences</span><span class="p">:</span> <span class="kt">Bool</span> <span class="o">=</span> <span class="kc">true</span><span class="p">)</span></code></pre>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">apply</span><span class="p">(</span><span class="n">_</span> <span class="nv">snapshot</span><span class="p">:</span> <span class="kt"><a href="../Structs/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a></span><span class="o">&lt;</span><span class="kt">SectionIdentifierType</span><span class="p">,</span> <span class="kt">ItemIdentifierType</span><span class="o">&gt;</span><span class="p">,</span> <span class="nv">animatingDifferences</span><span class="p">:</span> <span class="kt">Bool</span> <span class="o">=</span> <span class="kc">true</span><span class="p">,</span> <span class="nv">completion</span><span class="p">:</span> <span class="p">(()</span> <span class="o">-&gt;</span> <span class="kt">Void</span><span class="p">)?</span> <span class="o">=</span> <span class="kc">nil</span><span class="p">)</span></code></pre>
 
                         </div>
                       </div>
@@ -258,6 +258,19 @@ changes with automatic diffing.</p>
                                 </div>
                               </td>
                             </tr>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>completion</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>An optional completion block which is called when the complete
+        performing updates.</p>
+                                </div>
+                              </td>
+                            </tr>
                           </tbody>
                         </table>
                       </div>
@@ -267,9 +280,9 @@ changes with automatic diffing.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources09TableViewaB6SourceC8snapshotAA0abF8SnapshotCyxq_GyF"></a>
+                    <a name="/s:19DiffableDataSources09TableViewaB6SourceC8snapshotAA0abF8SnapshotVyxq_GyF"></a>
                     <a name="//apple_ref/swift/Method/snapshot()" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources09TableViewaB6SourceC8snapshotAA0abF8SnapshotCyxq_GyF">snapshot()</a>
+                    <a class="token" href="#/s:19DiffableDataSources09TableViewaB6SourceC8snapshotAA0abF8SnapshotVyxq_GyF">snapshot()</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -284,7 +297,7 @@ changes with automatic diffing.</p>
                         <h4>Declaration</h4>
                         <div class="language">
                           <p class="aside-title">Swift</p>
-                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">snapshot</span><span class="p">()</span> <span class="o">-&gt;</span> <span class="kt"><a href="../Classes/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a></span><span class="o">&lt;</span><span class="kt">SectionIdentifierType</span><span class="p">,</span> <span class="kt">ItemIdentifierType</span><span class="o">&gt;</span></code></pre>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">snapshot</span><span class="p">()</span> <span class="o">-&gt;</span> <span class="kt"><a href="../Structs/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a></span><span class="o">&lt;</span><span class="kt">SectionIdentifierType</span><span class="p">,</span> <span class="kt">ItemIdentifierType</span><span class="o">&gt;</span></code></pre>
 
                         </div>
                       </div>
@@ -507,6 +520,130 @@ changes with automatic diffing.</p>
                     </section>
                   </div>
                 </li>
+                <li class="item">
+                  <div>
+                    <code>
+                    <a name="/s:19DiffableDataSources09TableViewaB6SourceC05tableE0_23titleForHeaderInSectionSSSgSo07UITableE0C_SitF"></a>
+                    <a name="//apple_ref/swift/Method/tableView(_:titleForHeaderInSection:)" class="dashAnchor"></a>
+                    <a class="token" href="#/s:19DiffableDataSources09TableViewaB6SourceC05tableE0_23titleForHeaderInSectionSSSgSo07UITableE0C_SitF">tableView(_:titleForHeaderInSection:)</a>
+                    </code>
+                  </div>
+                  <div class="height-container">
+                    <div class="pointer-container"></div>
+                    <section class="section">
+                      <div class="pointer"></div>
+                      <div class="abstract">
+                        <p>Returns the title for the specified section&rsquo;s header.</p>
+
+                      </div>
+                      <div class="declaration">
+                        <h4>Declaration</h4>
+                        <div class="language">
+                          <p class="aside-title">Swift</p>
+                          <pre class="highlight swift"><code><span class="kd">open</span> <span class="kd">func</span> <span class="nf">tableView</span><span class="p">(</span><span class="n">_</span> <span class="nv">tableView</span><span class="p">:</span> <span class="kt">UITableView</span><span class="p">,</span> <span class="n">titleForHeaderInSection</span> <span class="nv">section</span><span class="p">:</span> <span class="kt">Int</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">String</span><span class="p">?</span></code></pre>
+
+                        </div>
+                      </div>
+                      <div>
+                        <h4>Parameters</h4>
+                        <table class="graybox">
+                          <tbody>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>tableView</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>A table view instance managed by <code>self</code>.</p>
+                                </div>
+                              </td>
+                            </tr>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>section</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>An index of section.</p>
+                                </div>
+                              </td>
+                            </tr>
+                          </tbody>
+                        </table>
+                      </div>
+                      <div>
+                        <h4>Return Value</h4>
+                        <p>The title for the specified section&rsquo;s header, or <code>nil</code> for no title.</p>
+                      </div>
+                    </section>
+                  </div>
+                </li>
+                <li class="item">
+                  <div>
+                    <code>
+                    <a name="/s:19DiffableDataSources09TableViewaB6SourceC05tableE0_23titleForFooterInSectionSSSgSo07UITableE0C_SitF"></a>
+                    <a name="//apple_ref/swift/Method/tableView(_:titleForFooterInSection:)" class="dashAnchor"></a>
+                    <a class="token" href="#/s:19DiffableDataSources09TableViewaB6SourceC05tableE0_23titleForFooterInSectionSSSgSo07UITableE0C_SitF">tableView(_:titleForFooterInSection:)</a>
+                    </code>
+                  </div>
+                  <div class="height-container">
+                    <div class="pointer-container"></div>
+                    <section class="section">
+                      <div class="pointer"></div>
+                      <div class="abstract">
+                        <p>Returns the title for the specified section&rsquo;s footer.</p>
+
+                      </div>
+                      <div class="declaration">
+                        <h4>Declaration</h4>
+                        <div class="language">
+                          <p class="aside-title">Swift</p>
+                          <pre class="highlight swift"><code><span class="kd">open</span> <span class="kd">func</span> <span class="nf">tableView</span><span class="p">(</span><span class="n">_</span> <span class="nv">tableView</span><span class="p">:</span> <span class="kt">UITableView</span><span class="p">,</span> <span class="n">titleForFooterInSection</span> <span class="nv">section</span><span class="p">:</span> <span class="kt">Int</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">String</span><span class="p">?</span></code></pre>
+
+                        </div>
+                      </div>
+                      <div>
+                        <h4>Parameters</h4>
+                        <table class="graybox">
+                          <tbody>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>tableView</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>A table view instance managed by <code>self</code>.</p>
+                                </div>
+                              </td>
+                            </tr>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>section</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>An index of section.</p>
+                                </div>
+                              </td>
+                            </tr>
+                          </tbody>
+                        </table>
+                      </div>
+                      <div>
+                        <h4>Return Value</h4>
+                        <p>The title for the specified section&rsquo;s footer, or <code>nil</code> for no title.</p>
+                      </div>
+                    </section>
+                  </div>
+                </li>
                 <li class="item">
                   <div>
                     <code>
@@ -569,6 +706,402 @@ changes with automatic diffing.</p>
                     </section>
                   </div>
                 </li>
+                <li class="item">
+                  <div>
+                    <code>
+                    <a name="/s:19DiffableDataSources09TableViewaB6SourceC05tableE0_12canEditRowAtSbSo07UITableE0C_10Foundation9IndexPathVtF"></a>
+                    <a name="//apple_ref/swift/Method/tableView(_:canEditRowAt:)" class="dashAnchor"></a>
+                    <a class="token" href="#/s:19DiffableDataSources09TableViewaB6SourceC05tableE0_12canEditRowAtSbSo07UITableE0C_10Foundation9IndexPathVtF">tableView(_:canEditRowAt:)</a>
+                    </code>
+                  </div>
+                  <div class="height-container">
+                    <div class="pointer-container"></div>
+                    <section class="section">
+                      <div class="pointer"></div>
+                      <div class="abstract">
+                        <p>Returns whether it is possible to edit a row at given index path.</p>
+
+                      </div>
+                      <div class="declaration">
+                        <h4>Declaration</h4>
+                        <div class="language">
+                          <p class="aside-title">Swift</p>
+                          <pre class="highlight swift"><code><span class="kd">open</span> <span class="kd">func</span> <span class="nf">tableView</span><span class="p">(</span><span class="n">_</span> <span class="nv">tableView</span><span class="p">:</span> <span class="kt">UITableView</span><span class="p">,</span> <span class="nv">canEditRowAt</span><span class="p">:</span> <span class="kt">IndexPath</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">Bool</span></code></pre>
+
+                        </div>
+                      </div>
+                      <div>
+                        <h4>Parameters</h4>
+                        <table class="graybox">
+                          <tbody>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>tableView</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>A table view instance managed by <code>self</code>.</p>
+                                </div>
+                              </td>
+                            </tr>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>section</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>An index of section.</p>
+                                </div>
+                              </td>
+                            </tr>
+                          </tbody>
+                        </table>
+                      </div>
+                      <div>
+                        <h4>Return Value</h4>
+                        <p>A boolean for row at specified index path.</p>
+                      </div>
+                    </section>
+                  </div>
+                </li>
+                <li class="item">
+                  <div>
+                    <code>
+                    <a name="/s:19DiffableDataSources09TableViewaB6SourceC05tableE0_12canMoveRowAtSbSo07UITableE0C_10Foundation9IndexPathVtF"></a>
+                    <a name="//apple_ref/swift/Method/tableView(_:canMoveRowAt:)" class="dashAnchor"></a>
+                    <a class="token" href="#/s:19DiffableDataSources09TableViewaB6SourceC05tableE0_12canMoveRowAtSbSo07UITableE0C_10Foundation9IndexPathVtF">tableView(_:canMoveRowAt:)</a>
+                    </code>
+                  </div>
+                  <div class="height-container">
+                    <div class="pointer-container"></div>
+                    <section class="section">
+                      <div class="pointer"></div>
+                      <div class="abstract">
+                        <p>Returns whether it is possible to move a row at given index path.</p>
+
+                      </div>
+                      <div class="declaration">
+                        <h4>Declaration</h4>
+                        <div class="language">
+                          <p class="aside-title">Swift</p>
+                          <pre class="highlight swift"><code><span class="kd">open</span> <span class="kd">func</span> <span class="nf">tableView</span><span class="p">(</span><span class="n">_</span> <span class="nv">tableView</span><span class="p">:</span> <span class="kt">UITableView</span><span class="p">,</span> <span class="n">canMoveRowAt</span> <span class="nv">_</span><span class="p">:</span> <span class="kt">IndexPath</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">Bool</span></code></pre>
+
+                        </div>
+                      </div>
+                      <div>
+                        <h4>Parameters</h4>
+                        <table class="graybox">
+                          <tbody>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>tableView</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>A table view instance managed by <code>self</code>.</p>
+                                </div>
+                              </td>
+                            </tr>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>section</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>An index of section.</p>
+                                </div>
+                              </td>
+                            </tr>
+                          </tbody>
+                        </table>
+                      </div>
+                      <div>
+                        <h4>Return Value</h4>
+                        <p>A boolean for row at specified index path.</p>
+                      </div>
+                    </section>
+                  </div>
+                </li>
+                <li class="item">
+                  <div>
+                    <code>
+                    <a name="/s:19DiffableDataSources09TableViewaB6SourceC05tableE0_6commit8forRowAtySo07UITableE0C_So0lE16CellEditingStyleV10Foundation9IndexPathVtF"></a>
+                    <a name="//apple_ref/swift/Method/tableView(_:commit:forRowAt:)" class="dashAnchor"></a>
+                    <a class="token" href="#/s:19DiffableDataSources09TableViewaB6SourceC05tableE0_6commit8forRowAtySo07UITableE0C_So0lE16CellEditingStyleV10Foundation9IndexPathVtF">tableView(_:commit:forRowAt:)</a>
+                    </code>
+                  </div>
+                  <div class="height-container">
+                    <div class="pointer-container"></div>
+                    <section class="section">
+                      <div class="pointer"></div>
+                      <div class="abstract">
+                        <p>Performs the edit action for a row at given index path.</p>
+
+                      </div>
+                      <div class="declaration">
+                        <h4>Declaration</h4>
+                        <div class="language">
+                          <p class="aside-title">Swift</p>
+                          <pre class="highlight swift"><code><span class="kd">open</span> <span class="kd">func</span> <span class="nf">tableView</span><span class="p">(</span><span class="n">_</span> <span class="nv">tableView</span><span class="p">:</span> <span class="kt">UITableView</span><span class="p">,</span> <span class="n">commit</span> <span class="nv">_</span><span class="p">:</span> <span class="kt">UITableViewCell</span><span class="o">.</span><span class="kt">EditingStyle</span><span class="p">,</span> <span class="n">forRowAt</span> <span class="nv">_</span><span class="p">:</span> <span class="kt">IndexPath</span><span class="p">)</span></code></pre>
+
+                        </div>
+                      </div>
+                      <div>
+                        <h4>Parameters</h4>
+                        <table class="graybox">
+                          <tbody>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>tableView</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>A table view instance managed by <code>self</code>.</p>
+                                </div>
+                              </td>
+                            </tr>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>editingStyle</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>An action for given edit action.</p>
+                                </div>
+                              </td>
+                            </tr>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>indexPath</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>An index path for cell.</p>
+                                </div>
+                              </td>
+                            </tr>
+                          </tbody>
+                        </table>
+                      </div>
+                      <div>
+                        <h4>Return Value</h4>
+                        <p>Void.</p>
+                      </div>
+                    </section>
+                  </div>
+                </li>
+                <li class="item">
+                  <div>
+                    <code>
+                    <a name="/s:19DiffableDataSources09TableViewaB6SourceC05tableE0_9moveRowAt2toySo07UITableE0C_10Foundation9IndexPathVAKtF"></a>
+                    <a name="//apple_ref/swift/Method/tableView(_:moveRowAt:to:)" class="dashAnchor"></a>
+                    <a class="token" href="#/s:19DiffableDataSources09TableViewaB6SourceC05tableE0_9moveRowAt2toySo07UITableE0C_10Foundation9IndexPathVAKtF">tableView(_:moveRowAt:to:)</a>
+                    </code>
+                  </div>
+                  <div class="height-container">
+                    <div class="pointer-container"></div>
+                    <section class="section">
+                      <div class="pointer"></div>
+                      <div class="abstract">
+                        <p>Moves a row at given index path.</p>
+
+                      </div>
+                      <div class="declaration">
+                        <h4>Declaration</h4>
+                        <div class="language">
+                          <p class="aside-title">Swift</p>
+                          <pre class="highlight swift"><code><span class="kd">open</span> <span class="kd">func</span> <span class="nf">tableView</span><span class="p">(</span><span class="n">_</span> <span class="nv">tableView</span><span class="p">:</span> <span class="kt">UITableView</span><span class="p">,</span> <span class="n">moveRowAt</span> <span class="nv">_</span><span class="p">:</span> <span class="kt">IndexPath</span><span class="p">,</span> <span class="n">to</span> <span class="nv">_</span><span class="p">:</span> <span class="kt">IndexPath</span><span class="p">)</span></code></pre>
+
+                        </div>
+                      </div>
+                      <div>
+                        <h4>Parameters</h4>
+                        <table class="graybox">
+                          <tbody>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>tableView</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>A table view instance managed by <code>self</code>.</p>
+                                </div>
+                              </td>
+                            </tr>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>source</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>An index path for given cell position.</p>
+                                </div>
+                              </td>
+                            </tr>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>target</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>An index path for target cell position.</p>
+                                </div>
+                              </td>
+                            </tr>
+                          </tbody>
+                        </table>
+                      </div>
+                      <div>
+                        <h4>Return Value</h4>
+                        <p>Void.</p>
+                      </div>
+                    </section>
+                  </div>
+                </li>
+                <li class="item">
+                  <div>
+                    <code>
+                    <a name="/s:19DiffableDataSources09TableViewaB6SourceC18sectionIndexTitles3forSaySSGSgSo07UITableE0C_tF"></a>
+                    <a name="//apple_ref/swift/Method/sectionIndexTitles(for:)" class="dashAnchor"></a>
+                    <a class="token" href="#/s:19DiffableDataSources09TableViewaB6SourceC18sectionIndexTitles3forSaySSGSgSo07UITableE0C_tF">sectionIndexTitles(for:)</a>
+                    </code>
+                  </div>
+                  <div class="height-container">
+                    <div class="pointer-container"></div>
+                    <section class="section">
+                      <div class="pointer"></div>
+                      <div class="abstract">
+                        <p>Return list of section titles to display in section index view (e.g. <q>ABCD&hellip;Z#</q>).</p>
+
+                      </div>
+                      <div class="declaration">
+                        <h4>Declaration</h4>
+                        <div class="language">
+                          <p class="aside-title">Swift</p>
+                          <pre class="highlight swift"><code><span class="kd">open</span> <span class="kd">func</span> <span class="nf">sectionIndexTitles</span><span class="p">(</span><span class="k">for</span> <span class="nv">tableView</span><span class="p">:</span> <span class="kt">UITableView</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="p">[</span><span class="kt">String</span><span class="p">]?</span></code></pre>
+
+                        </div>
+                      </div>
+                      <div>
+                        <h4>Parameters</h4>
+                        <table class="graybox">
+                          <tbody>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>tableView</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>A table view instance managed by <code>self</code>.</p>
+                                </div>
+                              </td>
+                            </tr>
+                          </tbody>
+                        </table>
+                      </div>
+                      <div>
+                        <h4>Return Value</h4>
+                        <p>The list of section titles to display.</p>
+                      </div>
+                    </section>
+                  </div>
+                </li>
+                <li class="item">
+                  <div>
+                    <code>
+                    <a name="/s:19DiffableDataSources09TableViewaB6SourceC05tableE0_27sectionForSectionIndexTitle2atSiSo07UITableE0C_SSSitF"></a>
+                    <a name="//apple_ref/swift/Method/tableView(_:sectionForSectionIndexTitle:at:)" class="dashAnchor"></a>
+                    <a class="token" href="#/s:19DiffableDataSources09TableViewaB6SourceC05tableE0_27sectionForSectionIndexTitle2atSiSo07UITableE0C_SSSitF">tableView(_:sectionForSectionIndexTitle:at:)</a>
+                    </code>
+                  </div>
+                  <div class="height-container">
+                    <div class="pointer-container"></div>
+                    <section class="section">
+                      <div class="pointer"></div>
+                      <div class="abstract">
+                        <p>Tell table which section corresponds to section title/index (e.g. <q>B</q>,1)).</p>
+
+                      </div>
+                      <div class="declaration">
+                        <h4>Declaration</h4>
+                        <div class="language">
+                          <p class="aside-title">Swift</p>
+                          <pre class="highlight swift"><code><span class="kd">open</span> <span class="kd">func</span> <span class="nf">tableView</span><span class="p">(</span><span class="n">_</span> <span class="nv">tableView</span><span class="p">:</span> <span class="kt">UITableView</span><span class="p">,</span> <span class="n">sectionForSectionIndexTitle</span> <span class="nv">_</span><span class="p">:</span> <span class="kt">String</span><span class="p">,</span> <span class="n">at</span> <span class="nv">section</span><span class="p">:</span> <span class="kt">Int</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">Int</span></code></pre>
+
+                        </div>
+                      </div>
+                      <div>
+                        <h4>Parameters</h4>
+                        <table class="graybox">
+                          <tbody>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>tableView</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>A table view instance managed by <code>self</code>.</p>
+                                </div>
+                              </td>
+                            </tr>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>title</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>The title as displayed in the section index of tableView.</p>
+                                </div>
+                              </td>
+                            </tr>
+                            <tr>
+                              <td>
+                                <code>
+                                <em>section</em>
+                                </code>
+                              </td>
+                              <td>
+                                <div>
+                                  <p>An index number identifying a section title in the array returned by sectionIndexTitles(for tableView:).</p>
+                                </div>
+                              </td>
+                            </tr>
+                          </tbody>
+                        </table>
+                      </div>
+                      <div>
+                        <h4>Return Value</h4>
+                        <p>The list of section titles to display.</p>
+                      </div>
+                    </section>
+                  </div>
+                </li>
               </ul>
             </div>
           </div>
@@ -577,8 +1110,8 @@ changes with automatic diffing.</p>
       </article>
     </div>
     <section class="footer">
-      <p>&copy; 2019 <a class="link" href="https://github.com/ra1028" target="_blank" rel="external">Ryo Aoyama</a>. All rights reserved. (Last updated: 2019-06-24)</p>
-      <p>Generated by <a class="link" href="https://github.com/realm/jazzy" target="_blank" rel="external">jazzy ♪♫ v0.9.4</a>, a <a class="link" href="https://realm.io" target="_blank" rel="external">Realm</a> project.</p>
+      <p>&copy; 2021 <a class="link" href="https://github.com/ra1028" target="_blank" rel="external">Ryo Aoyama</a>. All rights reserved. (Last updated: 2021-06-09)</p>
+      <p>Generated by <a class="link" href="https://github.com/realm/jazzy" target="_blank" rel="external">jazzy ♪♫ v0.11.2</a>, a <a class="link" href="https://realm.io" target="_blank" rel="external">Realm</a> project.</p>
     </section>
   </body>
 </div>

docs/DataSources.html

@@ -23,7 +23,7 @@
         <a class="header-link" href="index.html">
           DiffableDataSources Docs
         </a>
-         (100% documented)
+         (98% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -65,7 +65,7 @@
             <a class="nav-group-name-link" href="Snapshot.html">Snapshot</a>
             <ul class="nav-group-tasks">
               <li class="nav-group-task">
-                <a class="nav-group-task-link" href="Classes/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a>
+                <a class="nav-group-task-link" href="Structs/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a>
               </li>
             </ul>
           </li>
@@ -156,8 +156,8 @@ changes with automatic diffing.</p>
       </article>
     </div>
     <section class="footer">
-      <p>&copy; 2019 <a class="link" href="https://github.com/ra1028" target="_blank" rel="external">Ryo Aoyama</a>. All rights reserved. (Last updated: 2019-06-24)</p>
-      <p>Generated by <a class="link" href="https://github.com/realm/jazzy" target="_blank" rel="external">jazzy ♪♫ v0.9.4</a>, a <a class="link" href="https://realm.io" target="_blank" rel="external">Realm</a> project.</p>
+      <p>&copy; 2021 <a class="link" href="https://github.com/ra1028" target="_blank" rel="external">Ryo Aoyama</a>. All rights reserved. (Last updated: 2021-06-09)</p>
+      <p>Generated by <a class="link" href="https://github.com/realm/jazzy" target="_blank" rel="external">jazzy ♪♫ v0.11.2</a>, a <a class="link" href="https://realm.io" target="_blank" rel="external">Realm</a> project.</p>
     </section>
   </body>
 </div>

docs/Snapshot.html

@@ -23,7 +23,7 @@
         <a class="header-link" href="index.html">
           DiffableDataSources Docs
         </a>
-         (100% documented)
+         (98% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -65,7 +65,7 @@
             <a class="nav-group-name-link" href="Snapshot.html">Snapshot</a>
             <ul class="nav-group-tasks">
               <li class="nav-group-task">
-                <a class="nav-group-task-link" href="Classes/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a>
+                <a class="nav-group-task-link" href="Structs/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a>
               </li>
             </ul>
           </li>
@@ -87,9 +87,9 @@
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC"></a>
-                    <a name="//apple_ref/swift/Class/DiffableDataSourceSnapshot" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC">DiffableDataSourceSnapshot</a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV"></a>
+                    <a name="//apple_ref/swift/Struct/DiffableDataSourceSnapshot" class="dashAnchor"></a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV">DiffableDataSourceSnapshot</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -100,13 +100,13 @@
                         <p>A class for backporting <code>NSDiffableDataSourceSnapshot</code> introduced in iOS 13.0+, macOS 10.15+, tvOS 13.0+.
 Represents the mutable state of diffable data source of UI.</p>
 
-                        <a href="Classes/DiffableDataSourceSnapshot.html" class="slightly-smaller">See more</a>
+                        <a href="Structs/DiffableDataSourceSnapshot.html" class="slightly-smaller">See more</a>
                       </div>
                       <div class="declaration">
                         <h4>Declaration</h4>
                         <div class="language">
                           <p class="aside-title">Swift</p>
-                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">class</span> <span class="kt">DiffableDataSourceSnapshot</span><span class="o">&lt;</span><span class="kt">SectionIdentifierType</span><span class="p">,</span> <span class="kt">ItemIdentifierType</span><span class="o">&gt;</span> <span class="k">where</span> <span class="kt">SectionIdentifierType</span> <span class="p">:</span> <span class="kt">Hashable</span><span class="p">,</span> <span class="kt">ItemIdentifierType</span> <span class="p">:</span> <span class="kt">Hashable</span></code></pre>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">struct</span> <span class="kt">DiffableDataSourceSnapshot</span><span class="o">&lt;</span><span class="kt">SectionIdentifierType</span><span class="p">,</span> <span class="kt">ItemIdentifierType</span><span class="o">&gt;</span> <span class="k">where</span> <span class="kt">SectionIdentifierType</span> <span class="p">:</span> <span class="kt">Hashable</span><span class="p">,</span> <span class="kt">ItemIdentifierType</span> <span class="p">:</span> <span class="kt">Hashable</span></code></pre>
 
                         </div>
                       </div>
@@ -121,8 +121,8 @@ Represents the mutable state of diffable data source of UI.</p>
       </article>
     </div>
     <section class="footer">
-      <p>&copy; 2019 <a class="link" href="https://github.com/ra1028" target="_blank" rel="external">Ryo Aoyama</a>. All rights reserved. (Last updated: 2019-06-24)</p>
-      <p>Generated by <a class="link" href="https://github.com/realm/jazzy" target="_blank" rel="external">jazzy ♪♫ v0.9.4</a>, a <a class="link" href="https://realm.io" target="_blank" rel="external">Realm</a> project.</p>
+      <p>&copy; 2021 <a class="link" href="https://github.com/ra1028" target="_blank" rel="external">Ryo Aoyama</a>. All rights reserved. (Last updated: 2021-06-09)</p>
+      <p>Generated by <a class="link" href="https://github.com/realm/jazzy" target="_blank" rel="external">jazzy ♪♫ v0.11.2</a>, a <a class="link" href="https://realm.io" target="_blank" rel="external">Realm</a> project.</p>
     </section>
   </body>
 </div>

docs/Structs/DiffableDataSourceSnapshot.html

@@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <html lang="en">
   <head>
-    <title>DiffableDataSourceSnapshot Class Reference</title>
+    <title>DiffableDataSourceSnapshot Structure Reference</title>
     <link rel="stylesheet" type="text/css" href="../css/jazzy.css" />
     <link rel="stylesheet" type="text/css" href="../css/highlight.css" />
     <meta charset="utf-8">
@@ -14,16 +14,16 @@
   </head>
   <body>
 
-    <a name="//apple_ref/swift/Class/DiffableDataSourceSnapshot" class="dashAnchor"></a>
+    <a name="//apple_ref/swift/Struct/DiffableDataSourceSnapshot" class="dashAnchor"></a>
 
-    <a title="DiffableDataSourceSnapshot Class Reference"></a>
+    <a title="DiffableDataSourceSnapshot Structure Reference"></a>
 
     <header class="header">
       <p class="header-col header-col--primary">
         <a class="header-link" href="../index.html">
           DiffableDataSources Docs
         </a>
-         (100% documented)
+         (98% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -44,7 +44,7 @@
     <p class="breadcrumbs">
       <a class="breadcrumb" href="../index.html">DiffableDataSources Reference</a>
       <img class="carat" src="../img/carat.png" />
-      DiffableDataSourceSnapshot Class Reference
+      DiffableDataSourceSnapshot Structure Reference
     </p>
 
     <div class="content-wrapper">
@@ -65,7 +65,7 @@
             <a class="nav-group-name-link" href="../Snapshot.html">Snapshot</a>
             <ul class="nav-group-tasks">
               <li class="nav-group-task">
-                <a class="nav-group-task-link" href="../Classes/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a>
+                <a class="nav-group-task-link" href="../Structs/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a>
               </li>
             </ul>
           </li>
@@ -78,7 +78,7 @@
             <h1>DiffableDataSourceSnapshot</h1>
               <div class="declaration">
                 <div class="language">
-                  <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">class</span> <span class="kt">DiffableDataSourceSnapshot</span><span class="o">&lt;</span><span class="kt">SectionIdentifierType</span><span class="p">,</span> <span class="kt">ItemIdentifierType</span><span class="o">&gt;</span> <span class="k">where</span> <span class="kt">SectionIdentifierType</span> <span class="p">:</span> <span class="kt">Hashable</span><span class="p">,</span> <span class="kt">ItemIdentifierType</span> <span class="p">:</span> <span class="kt">Hashable</span></code></pre>
+                  <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">struct</span> <span class="kt">DiffableDataSourceSnapshot</span><span class="o">&lt;</span><span class="kt">SectionIdentifierType</span><span class="p">,</span> <span class="kt">ItemIdentifierType</span><span class="o">&gt;</span> <span class="k">where</span> <span class="kt">SectionIdentifierType</span> <span class="p">:</span> <span class="kt">Hashable</span><span class="p">,</span> <span class="kt">ItemIdentifierType</span> <span class="p">:</span> <span class="kt">Hashable</span></code></pre>
 
                 </div>
               </div>
@@ -95,9 +95,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotCACyxq_Gycfc"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotVACyxq_Gycfc"></a>
                     <a name="//apple_ref/swift/Method/init()" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotCACyxq_Gycfc">init()</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotVACyxq_Gycfc">init()</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -122,9 +122,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC13numberOfItemsSivp"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV13numberOfItemsSivp"></a>
                     <a name="//apple_ref/swift/Property/numberOfItems" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC13numberOfItemsSivp">numberOfItems</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV13numberOfItemsSivp">numberOfItems</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -149,9 +149,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC16numberOfSectionsSivp"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV16numberOfSectionsSivp"></a>
                     <a name="//apple_ref/swift/Property/numberOfSections" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC16numberOfSectionsSivp">numberOfSections</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV16numberOfSectionsSivp">numberOfSections</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -176,9 +176,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC18sectionIdentifiersSayxGvp"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV18sectionIdentifiersSayxGvp"></a>
                     <a name="//apple_ref/swift/Property/sectionIdentifiers" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC18sectionIdentifiersSayxGvp">sectionIdentifiers</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV18sectionIdentifiersSayxGvp">sectionIdentifiers</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -203,9 +203,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC15itemIdentifiersSayq_Gvp"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV15itemIdentifiersSayq_Gvp"></a>
                     <a name="//apple_ref/swift/Property/itemIdentifiers" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC15itemIdentifiersSayq_Gvp">itemIdentifiers</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV15itemIdentifiersSayq_Gvp">itemIdentifiers</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -230,9 +230,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC13numberOfItems9inSectionSix_tF"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV13numberOfItems9inSectionSix_tF"></a>
                     <a name="//apple_ref/swift/Method/numberOfItems(inSection:)" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC13numberOfItems9inSectionSix_tF">numberOfItems(inSection:)</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV13numberOfItems9inSectionSix_tF">numberOfItems(inSection:)</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -280,9 +280,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC15itemIdentifiers9inSectionSayq_Gx_tF"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV15itemIdentifiers9inSectionSayq_Gx_tF"></a>
                     <a name="//apple_ref/swift/Method/itemIdentifiers(inSection:)" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC15itemIdentifiers9inSectionSayq_Gx_tF">itemIdentifiers(inSection:)</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV15itemIdentifiers9inSectionSayq_Gx_tF">itemIdentifiers(inSection:)</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -330,9 +330,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC17sectionIdentifier14containingItemxSgq__tF"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV17sectionIdentifier14containingItemxSgq__tF"></a>
                     <a name="//apple_ref/swift/Method/sectionIdentifier(containingItem:)" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC17sectionIdentifier14containingItemxSgq__tF">sectionIdentifier(containingItem:)</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV17sectionIdentifier14containingItemxSgq__tF">sectionIdentifier(containingItem:)</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -380,9 +380,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC11indexOfItemySiSgq_F"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV11indexOfItemySiSgq_F"></a>
                     <a name="//apple_ref/swift/Method/indexOfItem(_:)" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC11indexOfItemySiSgq_F">indexOfItem(_:)</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV11indexOfItemySiSgq_F">indexOfItem(_:)</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -430,9 +430,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC14indexOfSectionySiSgxF"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV14indexOfSectionySiSgxF"></a>
                     <a name="//apple_ref/swift/Method/indexOfSection(_:)" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC14indexOfSectionySiSgxF">indexOfSection(_:)</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV14indexOfSectionySiSgxF">indexOfSection(_:)</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -480,9 +480,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC11appendItems_9toSectionySayq_G_xSgtF"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV11appendItems_9toSectionySayq_G_xSgtF"></a>
                     <a name="//apple_ref/swift/Method/appendItems(_:toSection:)" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC11appendItems_9toSectionySayq_G_xSgtF">appendItems(_:toSection:)</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV11appendItems_9toSectionySayq_G_xSgtF">appendItems(_:toSection:)</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -497,7 +497,7 @@ Represents the mutable state of diffable data source of UI.</p>
                         <h4>Declaration</h4>
                         <div class="language">
                           <p class="aside-title">Swift</p>
-                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">appendItems</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifiers</span><span class="p">:</span> <span class="p">[</span><span class="kt">ItemIdentifierType</span><span class="p">],</span> <span class="n">toSection</span> <span class="nv">sectionIdentifier</span><span class="p">:</span> <span class="kt">SectionIdentifierType</span><span class="p">?</span> <span class="o">=</span> <span class="kc">nil</span><span class="p">)</span></code></pre>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">mutating</span> <span class="kd">func</span> <span class="nf">appendItems</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifiers</span><span class="p">:</span> <span class="p">[</span><span class="kt">ItemIdentifierType</span><span class="p">],</span> <span class="n">toSection</span> <span class="nv">sectionIdentifier</span><span class="p">:</span> <span class="kt">SectionIdentifierType</span><span class="p">?</span> <span class="o">=</span> <span class="kc">nil</span><span class="p">)</span></code></pre>
 
                         </div>
                       </div>
@@ -538,9 +538,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC11insertItems_10beforeItemySayq_G_q_tF"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV11insertItems_10beforeItemySayq_G_q_tF"></a>
                     <a name="//apple_ref/swift/Method/insertItems(_:beforeItem:)" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC11insertItems_10beforeItemySayq_G_q_tF">insertItems(_:beforeItem:)</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV11insertItems_10beforeItemySayq_G_q_tF">insertItems(_:beforeItem:)</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -555,7 +555,7 @@ Represents the mutable state of diffable data source of UI.</p>
                         <h4>Declaration</h4>
                         <div class="language">
                           <p class="aside-title">Swift</p>
-                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">insertItems</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifiers</span><span class="p">:</span> <span class="p">[</span><span class="kt">ItemIdentifierType</span><span class="p">],</span> <span class="n">beforeItem</span> <span class="nv">beforeIdentifier</span><span class="p">:</span> <span class="kt">ItemIdentifierType</span><span class="p">)</span></code></pre>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">mutating</span> <span class="kd">func</span> <span class="nf">insertItems</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifiers</span><span class="p">:</span> <span class="p">[</span><span class="kt">ItemIdentifierType</span><span class="p">],</span> <span class="n">beforeItem</span> <span class="nv">beforeIdentifier</span><span class="p">:</span> <span class="kt">ItemIdentifierType</span><span class="p">)</span></code></pre>
 
                         </div>
                       </div>
@@ -596,9 +596,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC11insertItems_9afterItemySayq_G_q_tF"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV11insertItems_9afterItemySayq_G_q_tF"></a>
                     <a name="//apple_ref/swift/Method/insertItems(_:afterItem:)" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC11insertItems_9afterItemySayq_G_q_tF">insertItems(_:afterItem:)</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV11insertItems_9afterItemySayq_G_q_tF">insertItems(_:afterItem:)</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -613,7 +613,7 @@ Represents the mutable state of diffable data source of UI.</p>
                         <h4>Declaration</h4>
                         <div class="language">
                           <p class="aside-title">Swift</p>
-                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">insertItems</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifiers</span><span class="p">:</span> <span class="p">[</span><span class="kt">ItemIdentifierType</span><span class="p">],</span> <span class="n">afterItem</span> <span class="nv">afterIdentifier</span><span class="p">:</span> <span class="kt">ItemIdentifierType</span><span class="p">)</span></code></pre>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">mutating</span> <span class="kd">func</span> <span class="nf">insertItems</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifiers</span><span class="p">:</span> <span class="p">[</span><span class="kt">ItemIdentifierType</span><span class="p">],</span> <span class="n">afterItem</span> <span class="nv">afterIdentifier</span><span class="p">:</span> <span class="kt">ItemIdentifierType</span><span class="p">)</span></code></pre>
 
                         </div>
                       </div>
@@ -654,9 +654,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC11deleteItemsyySayq_GF"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV11deleteItemsyySayq_GF"></a>
                     <a name="//apple_ref/swift/Method/deleteItems(_:)" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC11deleteItemsyySayq_GF">deleteItems(_:)</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV11deleteItemsyySayq_GF">deleteItems(_:)</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -671,7 +671,7 @@ Represents the mutable state of diffable data source of UI.</p>
                         <h4>Declaration</h4>
                         <div class="language">
                           <p class="aside-title">Swift</p>
-                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">deleteItems</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifiers</span><span class="p">:</span> <span class="p">[</span><span class="kt">ItemIdentifierType</span><span class="p">])</span></code></pre>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">mutating</span> <span class="kd">func</span> <span class="nf">deleteItems</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifiers</span><span class="p">:</span> <span class="p">[</span><span class="kt">ItemIdentifierType</span><span class="p">])</span></code></pre>
 
                         </div>
                       </div>
@@ -700,9 +700,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC14deleteAllItemsyyF"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV14deleteAllItemsyyF"></a>
                     <a name="//apple_ref/swift/Method/deleteAllItems()" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC14deleteAllItemsyyF">deleteAllItems()</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV14deleteAllItemsyyF">deleteAllItems()</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -717,7 +717,7 @@ Represents the mutable state of diffable data source of UI.</p>
                         <h4>Declaration</h4>
                         <div class="language">
                           <p class="aside-title">Swift</p>
-                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">deleteAllItems</span><span class="p">()</span></code></pre>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">mutating</span> <span class="kd">func</span> <span class="nf">deleteAllItems</span><span class="p">()</span></code></pre>
 
                         </div>
                       </div>
@@ -727,9 +727,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC8moveItem_06beforeG0yq__q_tF"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV8moveItem_06beforeG0yq__q_tF"></a>
                     <a name="//apple_ref/swift/Method/moveItem(_:beforeItem:)" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC8moveItem_06beforeG0yq__q_tF">moveItem(_:beforeItem:)</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV8moveItem_06beforeG0yq__q_tF">moveItem(_:beforeItem:)</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -744,7 +744,7 @@ Represents the mutable state of diffable data source of UI.</p>
                         <h4>Declaration</h4>
                         <div class="language">
                           <p class="aside-title">Swift</p>
-                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">moveItem</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifier</span><span class="p">:</span> <span class="kt">ItemIdentifierType</span><span class="p">,</span> <span class="n">beforeItem</span> <span class="nv">toIdentifier</span><span class="p">:</span> <span class="kt">ItemIdentifierType</span><span class="p">)</span></code></pre>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">mutating</span> <span class="kd">func</span> <span class="nf">moveItem</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifier</span><span class="p">:</span> <span class="kt">ItemIdentifierType</span><span class="p">,</span> <span class="n">beforeItem</span> <span class="nv">toIdentifier</span><span class="p">:</span> <span class="kt">ItemIdentifierType</span><span class="p">)</span></code></pre>
 
                         </div>
                       </div>
@@ -785,9 +785,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC8moveItem_05afterG0yq__q_tF"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV8moveItem_05afterG0yq__q_tF"></a>
                     <a name="//apple_ref/swift/Method/moveItem(_:afterItem:)" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC8moveItem_05afterG0yq__q_tF">moveItem(_:afterItem:)</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV8moveItem_05afterG0yq__q_tF">moveItem(_:afterItem:)</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -802,7 +802,7 @@ Represents the mutable state of diffable data source of UI.</p>
                         <h4>Declaration</h4>
                         <div class="language">
                           <p class="aside-title">Swift</p>
-                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">moveItem</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifier</span><span class="p">:</span> <span class="kt">ItemIdentifierType</span><span class="p">,</span> <span class="n">afterItem</span> <span class="nv">toIdentifier</span><span class="p">:</span> <span class="kt">ItemIdentifierType</span><span class="p">)</span></code></pre>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">mutating</span> <span class="kd">func</span> <span class="nf">moveItem</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifier</span><span class="p">:</span> <span class="kt">ItemIdentifierType</span><span class="p">,</span> <span class="n">afterItem</span> <span class="nv">toIdentifier</span><span class="p">:</span> <span class="kt">ItemIdentifierType</span><span class="p">)</span></code></pre>
 
                         </div>
                       </div>
@@ -843,9 +843,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC11reloadItemsyySayq_GF"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV11reloadItemsyySayq_GF"></a>
                     <a name="//apple_ref/swift/Method/reloadItems(_:)" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC11reloadItemsyySayq_GF">reloadItems(_:)</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV11reloadItemsyySayq_GF">reloadItems(_:)</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -860,7 +860,7 @@ Represents the mutable state of diffable data source of UI.</p>
                         <h4>Declaration</h4>
                         <div class="language">
                           <p class="aside-title">Swift</p>
-                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">reloadItems</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifiers</span><span class="p">:</span> <span class="p">[</span><span class="kt">ItemIdentifierType</span><span class="p">])</span></code></pre>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">mutating</span> <span class="kd">func</span> <span class="nf">reloadItems</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifiers</span><span class="p">:</span> <span class="p">[</span><span class="kt">ItemIdentifierType</span><span class="p">])</span></code></pre>
 
                         </div>
                       </div>
@@ -889,9 +889,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC14appendSectionsyySayxGF"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV14appendSectionsyySayxGF"></a>
                     <a name="//apple_ref/swift/Method/appendSections(_:)" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC14appendSectionsyySayxGF">appendSections(_:)</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV14appendSectionsyySayxGF">appendSections(_:)</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -906,7 +906,7 @@ Represents the mutable state of diffable data source of UI.</p>
                         <h4>Declaration</h4>
                         <div class="language">
                           <p class="aside-title">Swift</p>
-                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">appendSections</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifiers</span><span class="p">:</span> <span class="p">[</span><span class="kt">SectionIdentifierType</span><span class="p">])</span></code></pre>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">mutating</span> <span class="kd">func</span> <span class="nf">appendSections</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifiers</span><span class="p">:</span> <span class="p">[</span><span class="kt">SectionIdentifierType</span><span class="p">])</span></code></pre>
 
                         </div>
                       </div>
@@ -935,9 +935,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC14insertSections_13beforeSectionySayxG_xtF"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV14insertSections_13beforeSectionySayxG_xtF"></a>
                     <a name="//apple_ref/swift/Method/insertSections(_:beforeSection:)" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC14insertSections_13beforeSectionySayxG_xtF">insertSections(_:beforeSection:)</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV14insertSections_13beforeSectionySayxG_xtF">insertSections(_:beforeSection:)</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -952,7 +952,7 @@ Represents the mutable state of diffable data source of UI.</p>
                         <h4>Declaration</h4>
                         <div class="language">
                           <p class="aside-title">Swift</p>
-                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">insertSections</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifiers</span><span class="p">:</span> <span class="p">[</span><span class="kt">SectionIdentifierType</span><span class="p">],</span> <span class="n">beforeSection</span> <span class="nv">toIdentifier</span><span class="p">:</span> <span class="kt">SectionIdentifierType</span><span class="p">)</span></code></pre>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">mutating</span> <span class="kd">func</span> <span class="nf">insertSections</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifiers</span><span class="p">:</span> <span class="p">[</span><span class="kt">SectionIdentifierType</span><span class="p">],</span> <span class="n">beforeSection</span> <span class="nv">toIdentifier</span><span class="p">:</span> <span class="kt">SectionIdentifierType</span><span class="p">)</span></code></pre>
 
                         </div>
                       </div>
@@ -993,9 +993,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC14insertSections_12afterSectionySayxG_xtF"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV14insertSections_12afterSectionySayxG_xtF"></a>
                     <a name="//apple_ref/swift/Method/insertSections(_:afterSection:)" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC14insertSections_12afterSectionySayxG_xtF">insertSections(_:afterSection:)</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV14insertSections_12afterSectionySayxG_xtF">insertSections(_:afterSection:)</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -1010,7 +1010,7 @@ Represents the mutable state of diffable data source of UI.</p>
                         <h4>Declaration</h4>
                         <div class="language">
                           <p class="aside-title">Swift</p>
-                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">insertSections</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifiers</span><span class="p">:</span> <span class="p">[</span><span class="kt">SectionIdentifierType</span><span class="p">],</span> <span class="n">afterSection</span> <span class="nv">toIdentifier</span><span class="p">:</span> <span class="kt">SectionIdentifierType</span><span class="p">)</span></code></pre>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">mutating</span> <span class="kd">func</span> <span class="nf">insertSections</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifiers</span><span class="p">:</span> <span class="p">[</span><span class="kt">SectionIdentifierType</span><span class="p">],</span> <span class="n">afterSection</span> <span class="nv">toIdentifier</span><span class="p">:</span> <span class="kt">SectionIdentifierType</span><span class="p">)</span></code></pre>
 
                         </div>
                       </div>
@@ -1051,9 +1051,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC14deleteSectionsyySayxGF"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV14deleteSectionsyySayxGF"></a>
                     <a name="//apple_ref/swift/Method/deleteSections(_:)" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC14deleteSectionsyySayxGF">deleteSections(_:)</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV14deleteSectionsyySayxGF">deleteSections(_:)</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -1068,7 +1068,7 @@ Represents the mutable state of diffable data source of UI.</p>
                         <h4>Declaration</h4>
                         <div class="language">
                           <p class="aside-title">Swift</p>
-                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">deleteSections</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifiers</span><span class="p">:</span> <span class="p">[</span><span class="kt">SectionIdentifierType</span><span class="p">])</span></code></pre>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">mutating</span> <span class="kd">func</span> <span class="nf">deleteSections</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifiers</span><span class="p">:</span> <span class="p">[</span><span class="kt">SectionIdentifierType</span><span class="p">])</span></code></pre>
 
                         </div>
                       </div>
@@ -1097,9 +1097,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC11moveSection_06beforeG0yx_xtF"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV11moveSection_06beforeG0yx_xtF"></a>
                     <a name="//apple_ref/swift/Method/moveSection(_:beforeSection:)" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC11moveSection_06beforeG0yx_xtF">moveSection(_:beforeSection:)</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV11moveSection_06beforeG0yx_xtF">moveSection(_:beforeSection:)</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -1114,7 +1114,7 @@ Represents the mutable state of diffable data source of UI.</p>
                         <h4>Declaration</h4>
                         <div class="language">
                           <p class="aside-title">Swift</p>
-                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">moveSection</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifier</span><span class="p">:</span> <span class="kt">SectionIdentifierType</span><span class="p">,</span> <span class="n">beforeSection</span> <span class="nv">toIdentifier</span><span class="p">:</span> <span class="kt">SectionIdentifierType</span><span class="p">)</span></code></pre>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">mutating</span> <span class="kd">func</span> <span class="nf">moveSection</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifier</span><span class="p">:</span> <span class="kt">SectionIdentifierType</span><span class="p">,</span> <span class="n">beforeSection</span> <span class="nv">toIdentifier</span><span class="p">:</span> <span class="kt">SectionIdentifierType</span><span class="p">)</span></code></pre>
 
                         </div>
                       </div>
@@ -1155,9 +1155,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC11moveSection_05afterG0yx_xtF"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV11moveSection_05afterG0yx_xtF"></a>
                     <a name="//apple_ref/swift/Method/moveSection(_:afterSection:)" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC11moveSection_05afterG0yx_xtF">moveSection(_:afterSection:)</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV11moveSection_05afterG0yx_xtF">moveSection(_:afterSection:)</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -1172,7 +1172,7 @@ Represents the mutable state of diffable data source of UI.</p>
                         <h4>Declaration</h4>
                         <div class="language">
                           <p class="aside-title">Swift</p>
-                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">moveSection</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifier</span><span class="p">:</span> <span class="kt">SectionIdentifierType</span><span class="p">,</span> <span class="n">afterSection</span> <span class="nv">toIdentifier</span><span class="p">:</span> <span class="kt">SectionIdentifierType</span><span class="p">)</span></code></pre>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">mutating</span> <span class="kd">func</span> <span class="nf">moveSection</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifier</span><span class="p">:</span> <span class="kt">SectionIdentifierType</span><span class="p">,</span> <span class="n">afterSection</span> <span class="nv">toIdentifier</span><span class="p">:</span> <span class="kt">SectionIdentifierType</span><span class="p">)</span></code></pre>
 
                         </div>
                       </div>
@@ -1213,9 +1213,9 @@ Represents the mutable state of diffable data source of UI.</p>
                 <li class="item">
                   <div>
                     <code>
-                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotC14reloadSectionsyySayxGF"></a>
+                    <a name="/s:19DiffableDataSources0aB14SourceSnapshotV14reloadSectionsyySayxGF"></a>
                     <a name="//apple_ref/swift/Method/reloadSections(_:)" class="dashAnchor"></a>
-                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotC14reloadSectionsyySayxGF">reloadSections(_:)</a>
+                    <a class="token" href="#/s:19DiffableDataSources0aB14SourceSnapshotV14reloadSectionsyySayxGF">reloadSections(_:)</a>
                     </code>
                   </div>
                   <div class="height-container">
@@ -1230,7 +1230,7 @@ Represents the mutable state of diffable data source of UI.</p>
                         <h4>Declaration</h4>
                         <div class="language">
                           <p class="aside-title">Swift</p>
-                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">reloadSections</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifiers</span><span class="p">:</span> <span class="p">[</span><span class="kt">SectionIdentifierType</span><span class="p">])</span></code></pre>
+                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">mutating</span> <span class="kd">func</span> <span class="nf">reloadSections</span><span class="p">(</span><span class="n">_</span> <span class="nv">identifiers</span><span class="p">:</span> <span class="p">[</span><span class="kt">SectionIdentifierType</span><span class="p">])</span></code></pre>
 
                         </div>
                       </div>
@@ -1264,8 +1264,8 @@ Represents the mutable state of diffable data source of UI.</p>
       </article>
     </div>
     <section class="footer">
-      <p>&copy; 2019 <a class="link" href="https://github.com/ra1028" target="_blank" rel="external">Ryo Aoyama</a>. All rights reserved. (Last updated: 2019-06-24)</p>
-      <p>Generated by <a class="link" href="https://github.com/realm/jazzy" target="_blank" rel="external">jazzy ♪♫ v0.9.4</a>, a <a class="link" href="https://realm.io" target="_blank" rel="external">Realm</a> project.</p>
+      <p>&copy; 2021 <a class="link" href="https://github.com/ra1028" target="_blank" rel="external">Ryo Aoyama</a>. All rights reserved. (Last updated: 2021-06-09)</p>
+      <p>Generated by <a class="link" href="https://github.com/realm/jazzy" target="_blank" rel="external">jazzy ♪♫ v0.11.2</a>, a <a class="link" href="https://realm.io" target="_blank" rel="external">Realm</a> project.</p>
     </section>
   </body>
 </div>

docs/badge.svg

@@ -1,15 +1,15 @@
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="136" height="20">
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="128" height="20">
   <linearGradient id="b" x2="0" y2="100%">
     <stop offset="0" stop-color="#bbb" stop-opacity=".1"/>
     <stop offset="1" stop-opacity=".1"/>
   </linearGradient>
   <clipPath id="a">
-    <rect width="136" height="20" rx="3" fill="#fff"/>
+    <rect width="128" height="20" rx="3" fill="#fff"/>
   </clipPath>
   <g clip-path="url(#a)">
     <path fill="#555" d="M0 0h93v20H0z"/>
-    <path fill="#4c1" d="M93 0h43v20H93z"/>
-    <path fill="url(#b)" d="M0 0h136v20H0z"/>
+    <path fill="#4c1" d="M93 0h35v20H93z"/>
+    <path fill="url(#b)" d="M0 0h128v20H0z"/>
   </g>
   <g fill="#fff" text-anchor="middle" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="110">
     <text x="475" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="830">
@@ -18,11 +18,11 @@
     <text x="475" y="140" transform="scale(.1)" textLength="830">
       documentation
     </text>
-    <text x="1135" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="330">
-      100%
+    <text x="1095" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="250">
+      98%
     </text>
-    <text x="1135" y="140" transform="scale(.1)" textLength="330">
-      100%
+    <text x="1095" y="140" transform="scale(.1)" textLength="250">
+      98%
     </text>
   </g>
 </svg>

docs/css/jazzy.css

@@ -63,6 +63,10 @@ a {
   a:hover, a:focus {
     outline: 0;
     text-decoration: underline; }
+  a.discouraged {
+    text-decoration: line-through; }
+    a.discouraged:hover, a.discouraged:focus {
+      text-decoration: underline line-through; }
 
 table {
   background: #fff;
@@ -225,7 +229,7 @@ pre code {
   .item a[name]:before {
     content: "";
     display: block; }
-  .item .token {
+  .item .token, .item .direct-link {
     padding-left: 3px;
     margin-left: 0px;
     font-size: 1rem; }
@@ -287,9 +291,9 @@ pre code {
   .language .aside-title {
     color: #4183c4; }
 
-.aside-warning {
+.aside-warning, .aside-deprecated, .aside-unavailable {
   border-left: 5px solid #ff6666; }
-  .aside-warning .aside-title {
+  .aside-warning .aside-title, .aside-deprecated .aside-title, .aside-unavailable .aside-title {
     color: #ff0000; }
 
 .graybox {
@@ -325,6 +329,7 @@ pre code {
 
 html.dash .header, html.dash .breadcrumbs, html.dash .navigation {
   display: none; }
+
 html.dash .height-container {
   display: block; }
 
@@ -338,14 +343,17 @@ form[role=search] input {
   border-radius: 1em; }
   .loading form[role=search] input {
     background: white url(../img/spinner.gif) center right 4px no-repeat; }
+
 form[role=search] .tt-menu {
   margin: 0;
   min-width: 300px;
   background: #fbfbfb;
   color: #333;
   border: 1px solid #ddd; }
+
 form[role=search] .tt-highlight {
   font-weight: bold; }
+
 form[role=search] .tt-suggestion {
   font: 16px/1.7 "Helvetica Neue", Helvetica, Arial, sans-serif;
   padding: 0 8px; }
@@ -358,11 +366,13 @@ form[role=search] .tt-suggestion {
     font-weight: normal;
     font-size: 0.9em;
     padding-left: 16px; }
+
 form[role=search] .tt-suggestion:hover,
 form[role=search] .tt-suggestion.tt-cursor {
   cursor: pointer;
   background-color: #4183c4;
   color: #fff; }
+
 form[role=search] .tt-suggestion:hover .doc-parent-name,
 form[role=search] .tt-suggestion.tt-cursor .doc-parent-name {
   color: #fff; }

docs/index.html

@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           DiffableDataSources Docs
         </a>
-         (100% documented)
+         (98% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -64,7 +64,7 @@
             <a class="nav-group-name-link" href="Snapshot.html">Snapshot</a>
             <ul class="nav-group-tasks">
               <li class="nav-group-task">
-                <a class="nav-group-task-link" href="Classes/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a>
+                <a class="nav-group-task-link" href="Structs/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a>
               </li>
             </ul>
           </li>
@@ -176,7 +176,7 @@ Correspondence table is below.  </p>
 
 <p>First, define the type representing section.<br>
 It should conforms to <code>Hashable</code> for identifies from the all sections.<br>
-Type of enum can used conveniently befause it conforms <code>Hashable</code> by default.  </p>
+Type of enum can used conveniently because it conforms <code>Hashable</code> by default.  </p>
 <pre class="highlight swift"><code><span class="kd">enum</span> <span class="kt">Section</span> <span class="p">{</span>
     <span class="k">case</span> <span class="n">main</span>
 <span class="p">}</span>
@@ -207,7 +207,7 @@ You should dequeue the non nil cells via closure.  </p>
 <span class="p">}</span>
 </code></pre>
 
-<p>Manages and updates the data sources intuitively by intermediating <code><a href="Classes/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a></code>.<br>
+<p>Manages and updates the data sources intuitively by intermediating <code><a href="Structs/DiffableDataSourceSnapshot.html">DiffableDataSourceSnapshot</a></code>.<br>
 The UI isn&rsquo;t updated until you apply the edited snapshot object.<br>
 Update the UI with diffing animation automatically calculated by applying an edited snapshot.  </p>
 <pre class="highlight swift"><code><span class="k">let</span> <span class="nv">users</span> <span class="o">=</span> <span class="p">[</span>
@@ -221,7 +221,9 @@ Update the UI with diffing animation automatically calculated by applying an edi
 <span class="n">snapshot</span><span class="o">.</span><span class="nf">appendSections</span><span class="p">([</span><span class="o">.</span><span class="n">main</span><span class="p">])</span>
 <span class="n">snapshot</span><span class="o">.</span><span class="nf">appendItems</span><span class="p">(</span><span class="n">users</span><span class="p">)</span>
 
-<span class="n">dataSource</span><span class="o">.</span><span class="nf">apply</span><span class="p">(</span><span class="n">snapshot</span><span class="p">)</span>
+<span class="n">dataSource</span><span class="o">.</span><span class="nf">apply</span><span class="p">(</span><span class="n">snapshot</span><span class="p">)</span> <span class="p">{</span>
+    <span class="c1">// completion</span>
+<span class="p">}</span>
 </code></pre>
 
 <p>Check the documentation for more detailed API.  </p>
@@ -285,8 +287,8 @@ Please see the <a href="https://github.com/ra1028/DiffableDataSources/blob/maste
       </article>
     </div>
     <section class="footer">
-      <p>&copy; 2019 <a class="link" href="https://github.com/ra1028" target="_blank" rel="external">Ryo Aoyama</a>. All rights reserved. (Last updated: 2019-06-24)</p>
-      <p>Generated by <a class="link" href="https://github.com/realm/jazzy" target="_blank" rel="external">jazzy ♪♫ v0.9.4</a>, a <a class="link" href="https://realm.io" target="_blank" rel="external">Realm</a> project.</p>
+      <p>&copy; 2021 <a class="link" href="https://github.com/ra1028" target="_blank" rel="external">Ryo Aoyama</a>. All rights reserved. (Last updated: 2021-06-09)</p>
+      <p>Generated by <a class="link" href="https://github.com/realm/jazzy" target="_blank" rel="external">jazzy ♪♫ v0.11.2</a>, a <a class="link" href="https://realm.io" target="_blank" rel="external">Realm</a> project.</p>
     </section>
   </body>
 </div>

docs/js/jazzy.js

@@ -8,26 +8,41 @@ if (navigator.userAgent.match(/xcode/i)) {
   window.jazzy.docset = true
 }
 
-// On doc load, toggle the URL hash discussion if present
-$(document).ready(function() {
-  if (!window.jazzy.docset) {
-    var linkToHash = $('a[href="' + window.location.hash +'"]');
-    linkToHash.trigger("click");
-  }
-});
+function toggleItem($link, $content) {
+  var animationDuration = 300;
+  $link.toggleClass('token-open');
+  $content.slideToggle(animationDuration);
+}
 
-// On token click, toggle its discussion and animate token.marginLeft
-$(".token").click(function(event) {
+function itemLinkToContent($link) {
+  return $link.parent().parent().next();
+}
+
+// On doc load + hash-change, open any targetted item
+function openCurrentItemIfClosed() {
   if (window.jazzy.docset) {
     return;
   }
-  var link = $(this);
-  var animationDuration = 300;
-  $content = link.parent().parent().next();
-  $content.slideToggle(animationDuration);
+  var $link = $(`.token[href="${location.hash}"]`);
+  $content = itemLinkToContent($link);
+  if ($content.is(':hidden')) {
+    toggleItem($link, $content);
+  }
+}
+
+$(openCurrentItemIfClosed);
+$(window).on('hashchange', openCurrentItemIfClosed);
+
+// On item link ('token') click, toggle its discussion
+$('.token').on('click', function(event) {
+  if (window.jazzy.docset) {
+    return;
+  }
+  var $link = $(this);
+  toggleItem($link, itemLinkToContent($link));
 
   // Keeps the document from jumping to the hash.
-  var href = $(this).attr('href');
+  var href = $link.attr('href');
   if (history.pushState) {
     history.pushState({}, '', href);
   } else {
@@ -36,8 +51,9 @@ $(".token").click(function(event) {
   event.preventDefault();
 });
 
-// Dumb down quotes within code blocks that delimit strings instead of quotations
-// https://github.com/realm/jazzy/issues/714
-$("code q").replaceWith(function () {
-  return ["\"", $(this).contents(), "\""];
+// Clicks on links to the current, closed, item need to open the item
+$("a:not('.token')").on('click', function() {
+  if (location == this.href) {
+    openCurrentItemIfClosed();
+  }
 });

docs/js/jazzy.search.js

@@ -1,9 +1,4 @@
 $(function(){
-  var searchIndex = lunr(function() {
-    this.ref('url');
-    this.field('name');
-  });
-
   var $typeahead = $('[data-typeahead]');
   var $form = $typeahead.parents('form');
   var searchURL = $form.attr('action');
@@ -26,21 +21,34 @@ $(function(){
     $form.addClass('loading');
 
     $.getJSON(searchURL).then(function(searchData) {
-      $.each(searchData, function (url, doc) {
-        searchIndex.add({url: url, name: doc.name});
+      const searchIndex = lunr(function() {
+        this.ref('url');
+        this.field('name');
+        this.field('abstract');
+        for (const [url, doc] of Object.entries(searchData)) {
+          this.add({url: url, name: doc.name, abstract: doc.abstract});
+        }
       });
 
       $typeahead.typeahead(
         {
           highlight: true,
-          minLength: 3
+          minLength: 3,
+          autoselect: true
         },
         {
           limit: 10,
           display: displayTemplate,
           templates: { suggestion: suggestionTemplate },
           source: function(query, sync) {
-            var results = searchIndex.search(query).map(function(result) {
+            const lcSearch = query.toLowerCase();
+            const results = searchIndex.query(function(q) {
+                q.term(lcSearch, { boost: 100 });
+                q.term(lcSearch, {
+                  boost: 10,
+                  wildcard: lunr.Query.wildcard.TRAILING
+                });
+            }).map(function(result) {
               var doc = searchData[result.ref];
               doc.url = result.ref;
               return doc;

docs/js/typeahead.jquery.js

@@ -1,18 +1,18 @@
 /*!
- * typeahead.js 0.11.1
+ * typeahead.js 1.2.0
  * https://github.com/twitter/typeahead.js
- * Copyright 2013-2015 Twitter, Inc. and other contributors; Licensed MIT
+ * Copyright 2013-2017 Twitter, Inc. and other contributors; Licensed MIT
  */
 
 (function(root, factory) {
     if (typeof define === "function" && define.amd) {
-        define("typeahead.js", [ "jquery" ], function(a0) {
+        define([ "jquery" ], function(a0) {
             return factory(a0);
         });
     } else if (typeof exports === "object") {
         module.exports = factory(require("jquery"));
     } else {
-        factory(jQuery);
+        factory(root["jQuery"]);
     }
 })(this, function($) {
     var _ = function() {
@@ -148,6 +148,13 @@
             stringify: function(val) {
                 return _.isString(val) ? val : JSON.stringify(val);
             },
+            guid: function() {
+                function _p8(s) {
+                    var p = (Math.random().toString(16) + "000000000").substr(2, 8);
+                    return s ? "-" + p.substr(0, 4) + "-" + p.substr(4, 4) : p;
+                }
+                return "tt-" + _p8() + _p8(true) + _p8(true) + _p8();
+            },
             noop: function() {}
         };
     }();
@@ -189,7 +196,7 @@
         function buildHtml(c) {
             return {
                 wrapper: '<span class="' + c.wrapper + '"></span>',
-                menu: '<div class="' + c.menu + '"></div>'
+                menu: '<div role="listbox" class="' + c.menu + '"></div>'
             };
         }
         function buildSelectors(classes) {
@@ -264,10 +271,8 @@
         }
         _.mixin(EventBus.prototype, {
             _trigger: function(type, args) {
-                var $e;
-                $e = $.Event(namespace + type);
-                (args = args || []).unshift($e);
-                this.$el.trigger.apply(this.$el, args);
+                var $e = $.Event(namespace + type);
+                this.$el.trigger.call(this.$el, $e, args || []);
                 return $e;
             },
             before: function(type) {
@@ -384,7 +389,36 @@
             tagName: "strong",
             className: null,
             wordsOnly: false,
-            caseSensitive: false
+            caseSensitive: false,
+            diacriticInsensitive: false
+        };
+        var accented = {
+            A: "[AaªÀ-Åà-åĀ-ąǍǎȀ-ȃȦȧᴬᵃḀḁẚẠ-ảₐ℀℁℻⒜Ⓐⓐ㍱-㍴㎀-㎄㎈㎉㎩-㎯㏂㏊㏟㏿Ａａ]",
+            B: "[BbᴮᵇḂ-ḇℬ⒝Ⓑⓑ㍴㎅-㎇㏃㏈㏔㏝Ｂｂ]",
+            C: "[CcÇçĆ-čᶜ℀ℂ℃℅℆ℭⅭⅽ⒞Ⓒⓒ㍶㎈㎉㎝㎠㎤㏄-㏇Ｃｃ]",
+            D: "[DdĎďDŽ-džDZ-dzᴰᵈḊ-ḓⅅⅆⅮⅾ⒟Ⓓⓓ㋏㍲㍷-㍹㎗㎭-㎯㏅㏈Ｄｄ]",
+            E: "[EeÈ-Ëè-ëĒ-ěȄ-ȇȨȩᴱᵉḘ-ḛẸ-ẽₑ℡ℯℰⅇ⒠Ⓔⓔ㉐㋍㋎Ｅｅ]",
+            F: "[FfᶠḞḟ℉ℱ℻⒡Ⓕⓕ㎊-㎌㎙ff-fflＦｆ]",
+            G: "[GgĜ-ģǦǧǴǵᴳᵍḠḡℊ⒢Ⓖⓖ㋌㋍㎇㎍-㎏㎓㎬㏆㏉㏒㏿Ｇｇ]",
+            H: "[HhĤĥȞȟʰᴴḢ-ḫẖℋ-ℎ⒣Ⓗⓗ㋌㍱㎐-㎔㏊㏋㏗Ｈｈ]",
+            I: "[IiÌ-Ïì-ïĨ-İIJijǏǐȈ-ȋᴵᵢḬḭỈ-ịⁱℐℑℹⅈⅠ-ⅣⅥ-ⅨⅪⅫⅰ-ⅳⅵ-ⅸⅺⅻ⒤Ⓘⓘ㍺㏌㏕fiffiＩｉ]",
+            J: "[JjIJ-ĵLJ-njǰʲᴶⅉ⒥ⒿⓙⱼＪｊ]",
+            K: "[KkĶķǨǩᴷᵏḰ-ḵK⒦Ⓚⓚ㎄㎅㎉㎏㎑㎘㎞㎢㎦㎪㎸㎾㏀㏆㏍-㏏Ｋｋ]",
+            L: "[LlĹ-ŀLJ-ljˡᴸḶḷḺ-ḽℒℓ℡Ⅼⅼ⒧Ⓛⓛ㋏㎈㎉㏐-㏓㏕㏖㏿flfflＬｌ]",
+            M: "[MmᴹᵐḾ-ṃ℠™ℳⅯⅿ⒨Ⓜⓜ㍷-㍹㎃㎆㎎㎒㎖㎙-㎨㎫㎳㎷㎹㎽㎿㏁㏂㏎㏐㏔-㏖㏘㏙㏞㏟Ｍｍ]",
+            N: "[NnÑñŃ-ʼnNJ-njǸǹᴺṄ-ṋⁿℕ№⒩Ⓝⓝ㎁㎋㎚㎱㎵㎻㏌㏑Ｎｎ]",
+            O: "[OoºÒ-Öò-öŌ-őƠơǑǒǪǫȌ-ȏȮȯᴼᵒỌ-ỏₒ℅№ℴ⒪Ⓞⓞ㍵㏇㏒㏖Ｏｏ]",
+            P: "[PpᴾᵖṔ-ṗℙ⒫Ⓟⓟ㉐㍱㍶㎀㎊㎩-㎬㎰㎴㎺㏋㏗-㏚Ｐｐ]",
+            Q: "[Qqℚ⒬Ⓠⓠ㏃Ｑｑ]",
+            R: "[RrŔ-řȐ-ȓʳᴿᵣṘ-ṛṞṟ₨ℛ-ℝ⒭Ⓡⓡ㋍㍴㎭-㎯㏚㏛Ｒｒ]",
+            S: "[SsŚ-šſȘșˢṠ-ṣ₨℁℠⒮Ⓢⓢ㎧㎨㎮-㎳㏛㏜stＳｓ]",
+            T: "[TtŢ-ťȚțᵀᵗṪ-ṱẗ℡™⒯Ⓣⓣ㉐㋏㎔㏏ſtstＴｔ]",
+            U: "[UuÙ-Üù-üŨ-ųƯưǓǔȔ-ȗᵁᵘᵤṲ-ṷỤ-ủ℆⒰Ⓤⓤ㍳㍺Ｕｕ]",
+            V: "[VvᵛᵥṼ-ṿⅣ-Ⅷⅳ-ⅷ⒱Ⓥⓥⱽ㋎㍵㎴-㎹㏜㏞Ｖｖ]",
+            W: "[WwŴŵʷᵂẀ-ẉẘ⒲Ⓦⓦ㎺-㎿㏝Ｗｗ]",
+            X: "[XxˣẊ-ẍₓ℻Ⅸ-Ⅻⅸ-ⅻ⒳Ⓧⓧ㏓Ｘｘ]",
+            Y: "[YyÝýÿŶ-ŸȲȳʸẎẏẙỲ-ỹ⒴Ⓨⓨ㏉Ｙｙ]",
+            Z: "[ZzŹ-žDZ-dzᶻẐ-ẕℤℨ⒵Ⓩⓩ㎐-㎔Ｚｚ]"
         };
         return function hightlight(o) {
             var regex;
@@ -393,7 +427,7 @@
                 return;
             }
             o.pattern = _.isArray(o.pattern) ? o.pattern : [ o.pattern ];
-            regex = getRegex(o.pattern, o.caseSensitive, o.wordsOnly);
+            regex = getRegex(o.pattern, o.caseSensitive, o.wordsOnly, o.diacriticInsensitive);
             traverse(o.node, hightlightTextNode);
             function hightlightTextNode(textNode) {
                 var match, patternNode, wrapperNode;
@@ -419,10 +453,17 @@
                 }
             }
         };
-        function getRegex(patterns, caseSensitive, wordsOnly) {
+        function accent_replacer(chr) {
+            return accented[chr.toUpperCase()] || chr;
+        }
+        function getRegex(patterns, caseSensitive, wordsOnly, diacriticInsensitive) {
             var escapedPatterns = [], regexStr;
             for (var i = 0, len = patterns.length; i < len; i++) {
-                escapedPatterns.push(_.escapeRegExChars(patterns[i]));
+                var escapedWord = _.escapeRegExChars(patterns[i]);
+                if (diacriticInsensitive) {
+                    escapedWord = escapedWord.replace(/\S/g, accent_replacer);
+                }
+                escapedPatterns.push(escapedWord);
             }
             regexStr = wordsOnly ? "\\b(" + escapedPatterns.join("|") + ")\\b" : "(" + escapedPatterns.join("|") + ")";
             return caseSensitive ? new RegExp(regexStr) : new RegExp(regexStr, "i");
@@ -448,6 +489,14 @@
             www.mixin(this);
             this.$hint = $(o.hint);
             this.$input = $(o.input);
+            this.$input.attr({
+                "aria-activedescendant": "",
+                "aria-owns": this.$input.attr("id") + "_listbox",
+                role: "combobox",
+                "aria-readonly": "true",
+                "aria-autocomplete": "list"
+            });
+            $(www.menu).attr("id", this.$input.attr("id") + "_listbox");
             this.query = this.$input.val();
             this.queryWhenFocused = this.hasFocus() ? this.query : null;
             this.$overflowHelper = buildOverflowHelper(this.$input);
@@ -455,6 +504,7 @@
             if (this.$hint.length === 0) {
                 this.setHint = this.getHint = this.clearHint = this.clearHintIfInvalid = _.noop;
             }
+            this.onSync("cursorchange", this._updateDescendent);
         }
         Input.normalizeQuery = function(str) {
             return _.toStr(str).replace(/^\s*/g, "").replace(/\s{2,}/g, " ");
@@ -524,6 +574,9 @@
                     this.trigger("whitespaceChanged", this.query);
                 }
             },
+            _updateDescendent: function updateDescendent(event, id) {
+                this.$input.attr("aria-activedescendant", id);
+            },
             bind: function() {
                 var that = this, onBlur, onFocus, onKeydown, onInput;
                 onBlur = _.bind(this._onBlur, this);
@@ -647,6 +700,7 @@
         "use strict";
         var keys, nameGenerator;
         keys = {
+            dataset: "tt-selectable-dataset",
             val: "tt-selectable-display",
             obj: "tt-selectable-object"
         };
@@ -666,19 +720,20 @@
             }
             www.mixin(this);
             this.highlight = !!o.highlight;
-            this.name = o.name || nameGenerator();
+            this.name = _.toStr(o.name || nameGenerator());
             this.limit = o.limit || 5;
             this.displayFn = getDisplayFn(o.display || o.displayKey);
             this.templates = getTemplates(o.templates, this.displayFn);
             this.source = o.source.__ttAdapter ? o.source.__ttAdapter() : o.source;
             this.async = _.isUndefined(o.async) ? this.source.length > 2 : !!o.async;
             this._resetLastSuggestion();
-            this.$el = $(o.node).addClass(this.classes.dataset).addClass(this.classes.dataset + "-" + this.name);
+            this.$el = $(o.node).attr("role", "presentation").addClass(this.classes.dataset).addClass(this.classes.dataset + "-" + this.name);
         }
         Dataset.extractData = function extractData(el) {
             var $el = $(el);
             if ($el.data(keys.obj)) {
                 return {
+                    dataset: $el.data(keys.dataset) || "",
                     val: $el.data(keys.val) || "",
                     obj: $el.data(keys.obj) || null
                 };
@@ -697,7 +752,7 @@
                 } else {
                     this._empty();
                 }
-                this.trigger("rendered", this.name, suggestions, false);
+                this.trigger("rendered", suggestions, false, this.name);
             },
             _append: function append(query, suggestions) {
                 suggestions = suggestions || [];
@@ -708,7 +763,7 @@
                 } else if (!this.$lastSuggestion.length && this.templates.notFound) {
                     this._renderNotFound(query);
                 }
-                this.trigger("rendered", this.name, suggestions, true);
+                this.trigger("rendered", suggestions, true, this.name);
             },
             _renderSuggestions: function renderSuggestions(query, suggestions) {
                 var $fragment;
@@ -749,7 +804,7 @@
                 _.each(suggestions, function getSuggestionNode(suggestion) {
                     var $el, context;
                     context = that._injectQuery(query, suggestion);
-                    $el = $(that.templates.suggestion(context)).data(keys.obj, suggestion).data(keys.val, that.displayFn(suggestion)).addClass(that.classes.suggestion + " " + that.classes.selectable);
+                    $el = $(that.templates.suggestion(context)).data(keys.dataset, that.name).data(keys.obj, suggestion).data(keys.val, that.displayFn(suggestion)).addClass(that.classes.suggestion + " " + that.classes.selectable);
                     fragment.appendChild($el[0]);
                 });
                 this.highlight && highlight({
@@ -787,7 +842,7 @@
                 this.cancel = function cancel() {
                     canceled = true;
                     that.cancel = $.noop;
-                    that.async && that.trigger("asyncCanceled", query);
+                    that.async && that.trigger("asyncCanceled", query, that.name);
                 };
                 this.source(query, sync, async);
                 !syncCalled && sync([]);
@@ -800,16 +855,17 @@
                     rendered = suggestions.length;
                     that._overwrite(query, suggestions);
                     if (rendered < that.limit && that.async) {
-                        that.trigger("asyncRequested", query);
+                        that.trigger("asyncRequested", query, that.name);
                     }
                 }
                 function async(suggestions) {
                     suggestions = suggestions || [];
                     if (!canceled && rendered < that.limit) {
                         that.cancel = $.noop;
-                        rendered += suggestions.length;
-                        that._append(query, suggestions.slice(0, that.limit - rendered));
-                        that.async && that.trigger("asyncReceived", query);
+                        var idx = Math.abs(rendered - that.limit);
+                        rendered += idx;
+                        that._append(query, suggestions.slice(0, idx));
+                        that.async && that.trigger("asyncReceived", query, that.name);
                     }
                 }
             },
@@ -843,7 +899,7 @@
                 suggestion: templates.suggestion || suggestionTemplate
             };
             function suggestionTemplate(context) {
-                return $("<div>").text(displayFn(context));
+                return $('<div role="option">').attr("id", _.guid()).text(displayFn(context));
             }
         }
         function isValidName(str) {
@@ -884,10 +940,11 @@
                 this.trigger.apply(this, arguments);
             },
             _allDatasetsEmpty: function allDatasetsEmpty() {
-                return _.every(this.datasets, isDatasetEmpty);
-                function isDatasetEmpty(dataset) {
-                    return dataset.isEmpty();
-                }
+                return _.every(this.datasets, _.bind(function isDatasetEmpty(dataset) {
+                    var isEmpty = dataset.isEmpty();
+                    this.$node.attr("aria-expanded", !isEmpty);
+                    return isEmpty;
+                }, this));
             },
             _getSelectables: function getSelectables() {
                 return this.$node.find(this.selectors.selectable);
@@ -912,6 +969,12 @@
                 var that = this, onSelectableClick;
                 onSelectableClick = _.bind(this._onSelectableClick, this);
                 this.$node.on("click.tt", this.selectors.selectable, onSelectableClick);
+                this.$node.on("mouseover", this.selectors.selectable, function() {
+                    that.setCursor($(this));
+                });
+                this.$node.on("mouseleave", function() {
+                    that._removeCursor();
+                });
                 _.each(this.datasets, function(dataset) {
                     dataset.onSync("asyncRequested", that._propagate, that).onSync("asyncCanceled", that._propagate, that).onSync("asyncReceived", that._propagate, that).onSync("rendered", that._onRendered, that).onSync("cleared", that._onCleared, that);
                 });
@@ -921,9 +984,11 @@
                 return this.$node.hasClass(this.classes.open);
             },
             open: function open() {
+                this.$node.scrollTop(0);
                 this.$node.addClass(this.classes.open);
             },
             close: function close() {
+                this.$node.attr("aria-expanded", false);
                 this.$node.removeClass(this.classes.open);
                 this._removeCursor();
             },
@@ -988,6 +1053,55 @@
         });
         return Menu;
     }();
+    var Status = function() {
+        "use strict";
+        function Status(options) {
+            this.$el = $("<span></span>", {
+                role: "status",
+                "aria-live": "polite"
+            }).css({
+                position: "absolute",
+                padding: "0",
+                border: "0",
+                height: "1px",
+                width: "1px",
+                "margin-bottom": "-1px",
+                "margin-right": "-1px",
+                overflow: "hidden",
+                clip: "rect(0 0 0 0)",
+                "white-space": "nowrap"
+            });
+            options.$input.after(this.$el);
+            _.each(options.menu.datasets, _.bind(function(dataset) {
+                if (dataset.onSync) {
+                    dataset.onSync("rendered", _.bind(this.update, this));
+                    dataset.onSync("cleared", _.bind(this.cleared, this));
+                }
+            }, this));
+        }
+        _.mixin(Status.prototype, {
+            update: function update(event, suggestions) {
+                var length = suggestions.length;
+                var words;
+                if (length === 1) {
+                    words = {
+                        result: "result",
+                        is: "is"
+                    };
+                } else {
+                    words = {
+                        result: "results",
+                        is: "are"
+                    };
+                }
+                this.$el.text(length + " " + words.result + " " + words.is + " available, use up and down arrow keys to navigate.");
+            },
+            cleared: function() {
+                this.$el.text("");
+            }
+        });
+        return Status;
+    }();
     var DefaultMenu = function() {
         "use strict";
         var s = Menu.prototype;
@@ -1052,6 +1166,7 @@
             this.input = o.input;
             this.menu = o.menu;
             this.enabled = true;
+            this.autoselect = !!o.autoselect;
             this.active = false;
             this.input.hasFocus() && this.activate();
             this.dir = this.input.getLangDir();
@@ -1098,8 +1213,12 @@
             _onDatasetCleared: function onDatasetCleared() {
                 this._updateHint();
             },
-            _onDatasetRendered: function onDatasetRendered(type, dataset, suggestions, async) {
+            _onDatasetRendered: function onDatasetRendered(type, suggestions, async, dataset) {
                 this._updateHint();
+                if (this.autoselect) {
+                    var cursorClass = this.selectors.cursor.substr(1);
+                    this.menu.$node.find(this.selectors.suggestion).first().addClass(cursorClass);
+                }
                 this.eventBus.trigger("render", suggestions, async, dataset);
             },
             _onAsyncRequested: function onAsyncRequested(type, dataset, query) {
@@ -1122,7 +1241,15 @@
             _onEnterKeyed: function onEnterKeyed(type, $e) {
                 var $selectable;
                 if ($selectable = this.menu.getActiveSelectable()) {
-                    this.select($selectable) && $e.preventDefault();
+                    if (this.select($selectable)) {
+                        $e.preventDefault();
+                        $e.stopPropagation();
+                    }
+                } else if (this.autoselect) {
+                    if (this.select(this.menu.getTopSelectable())) {
+                        $e.preventDefault();
+                        $e.stopPropagation();
+                    }
                 }
             },
             _onTabKeyed: function onTabKeyed(type, $e) {
@@ -1144,12 +1271,12 @@
             },
             _onLeftKeyed: function onLeftKeyed() {
                 if (this.dir === "rtl" && this.input.isCursorAtEnd()) {
-                    this.autocomplete(this.menu.getTopSelectable());
+                    this.autocomplete(this.menu.getActiveSelectable() || this.menu.getTopSelectable());
                 }
             },
             _onRightKeyed: function onRightKeyed() {
                 if (this.dir === "ltr" && this.input.isCursorAtEnd()) {
-                    this.autocomplete(this.menu.getTopSelectable());
+                    this.autocomplete(this.menu.getActiveSelectable() || this.menu.getTopSelectable());
                 }
             },
             _onQueryChanged: function onQueryChanged(e, query) {
@@ -1249,9 +1376,9 @@
             },
             select: function select($selectable) {
                 var data = this.menu.getSelectableData($selectable);
-                if (data && !this.eventBus.before("select", data.obj)) {
+                if (data && !this.eventBus.before("select", data.obj, data.dataset)) {
                     this.input.setQuery(data.val, true);
-                    this.eventBus.trigger("select", data.obj);
+                    this.eventBus.trigger("select", data.obj, data.dataset);
                     this.close();
                     return true;
                 }
@@ -1262,21 +1389,24 @@
                 query = this.input.getQuery();
                 data = this.menu.getSelectableData($selectable);
                 isValid = data && query !== data.val;
-                if (isValid && !this.eventBus.before("autocomplete", data.obj)) {
+                if (isValid && !this.eventBus.before("autocomplete", data.obj, data.dataset)) {
                     this.input.setQuery(data.val);
-                    this.eventBus.trigger("autocomplete", data.obj);
+                    this.eventBus.trigger("autocomplete", data.obj, data.dataset);
                     return true;
                 }
                 return false;
             },
             moveCursor: function moveCursor(delta) {
-                var query, $candidate, data, payload, cancelMove;
+                var query, $candidate, data, suggestion, datasetName, cancelMove, id;
                 query = this.input.getQuery();
                 $candidate = this.menu.selectableRelativeToCursor(delta);
                 data = this.menu.getSelectableData($candidate);
-                payload = data ? data.obj : null;
+                suggestion = data ? data.obj : null;
+                datasetName = data ? data.dataset : null;
+                id = $candidate ? $candidate.attr("id") : null;
+                this.input.trigger("cursorchange", id);
                 cancelMove = this._minLengthMet() && this.menu.update(query);
-                if (!cancelMove && !this.eventBus.before("cursorchange", payload)) {
+                if (!cancelMove && !this.eventBus.before("cursorchange", suggestion, datasetName)) {
                     this.menu.setCursor($candidate);
                     if (data) {
                         this.input.setInputValue(data.val);
@@ -1284,7 +1414,7 @@
                         this.input.resetInputValue();
                         this._updateHint();
                     }
-                    this.eventBus.trigger("cursorchange", payload);
+                    this.eventBus.trigger("cursorchange", suggestion, datasetName);
                     return true;
                 }
                 return false;
@@ -1322,7 +1452,7 @@
                 www = WWW(o.classNames);
                 return this.each(attach);
                 function attach() {
-                    var $input, $wrapper, $hint, $menu, defaultHint, defaultMenu, eventBus, input, menu, typeahead, MenuConstructor;
+                    var $input, $wrapper, $hint, $menu, defaultHint, defaultMenu, eventBus, input, menu, status, typeahead, MenuConstructor;
                     _.each(datasets, function(d) {
                         d.highlight = !!o.highlight;
                     });
@@ -1353,11 +1483,16 @@
                         node: $menu,
                         datasets: datasets
                     }, www);
+                    status = new Status({
+                        $input: $input,
+                        menu: menu
+                    });
                     typeahead = new Typeahead({
                         input: input,
                         menu: menu,
                         eventBus: eventBus,
-                        minLength: o.minLength
+                        minLength: o.minLength,
+                        autoselect: o.autoselect
                     }, www);
                     $input.data(keys.www, www);
                     $input.data(keys.typeahead, typeahead);
@@ -1450,7 +1585,7 @@
                     return query;
                 } else {
                     ttEach(this, function(t) {
-                        t.setVal(newVal);
+                        t.setVal(_.toStr(newVal));
                     });
                     return this;
                 }
@@ -1481,8 +1616,10 @@
             });
         }
         function buildHintFromInput($input, www) {
-            return $input.clone().addClass(www.classes.hint).removeData().css(www.css.hint).css(getBackgroundStyles($input)).prop("readonly", true).removeAttr("id name placeholder required").attr({
-                autocomplete: "off",
+            return $input.clone().addClass(www.classes.hint).removeData().css(www.css.hint).css(getBackgroundStyles($input)).prop({
+                readonly: true,
+                required: false
+            }).removeAttr("id name placeholder").removeClass("required").attr({
                 spellcheck: "false",
                 tabindex: -1
             });
@@ -1495,7 +1632,6 @@
                 style: $input.attr("style")
             });
             $input.addClass(www.classes.input).attr({
-                autocomplete: "off",
                 spellcheck: false
             });
             try {