Remove std::any dependency (for now).

Xcode 9 still doesn't have std::any :(

Telegram/SourceFiles/boxes/peer_list_box.cpp

@@ -260,6 +260,15 @@ void PeerListController::setSearchNoResultsText(const QString &text) {
 	}
 }
 
+std::unique_ptr<PeerListState> PeerListController::saveState() {
+	return delegate()->peerListSaveState();
+}
+
+void PeerListController::restoreState(
+		std::unique_ptr<PeerListState> state) {
+	delegate()->peerListRestoreState(std::move(state));
+}
+
 void PeerListBox::addSelectItem(not_null<PeerData*> peer, PeerListRow::SetStyle style) {
 	if (!_select) {
 		createMultiSelect();
@@ -1230,7 +1239,8 @@ void PeerListContent::searchQueryChanged(QString query) {
 
 std::unique_ptr<PeerListState> PeerListContent::saveState() const {
 	auto result = std::make_unique<PeerListState>();
-	result->controllerState = EmptyControllerState();
+	result->controllerState
+		= std::make_unique<PeerListController::SavedStateBase>();
 	result->list.reserve(_rows.size());
 	for (auto &row : _rows) {
 		result->list.push_back(row->peer());
@@ -1245,7 +1255,7 @@ std::unique_ptr<PeerListState> PeerListContent::saveState() const {
 
 void PeerListContent::restoreState(
 		std::unique_ptr<PeerListState> state) {
-	if (!state || !state->controllerState.has_value()) {
+	if (!state || !state->controllerState) {
 		return;
 	}
 

Telegram/SourceFiles/boxes/peer_list_box.h

@@ -215,16 +215,7 @@ enum class PeerListSearchMode {
 	Enabled,
 };
 
-struct PeerListState {
+struct PeerListState;
-	PeerListState() = default;
-	PeerListState(PeerListState &&other) = delete;
-	PeerListState &operator=(PeerListState &&other) = delete;
-
-	base::unique_any controllerState;
-	std::vector<not_null<PeerData*>> list;
-	std::vector<not_null<PeerData*>> filterResults;
-	QString searchQuery;
-};
 
 class PeerListDelegate {
 public:
@@ -284,6 +275,10 @@ public:
 
 class PeerListSearchController {
 public:
+	struct SavedStateBase {
+		virtual ~SavedStateBase() = default;
+	};
+
 	virtual void searchQuery(const QString &query) = 0;
 	virtual bool isLoading() = 0;
 	virtual bool loadMoreRows() = 0;
@@ -293,10 +288,11 @@ public:
 		_delegate = delegate;
 	}
 
-	virtual base::unique_any saveState() {
+	virtual std::unique_ptr<SavedStateBase> saveState() {
-		return {};
+		return nullptr;
 	}
-	virtual void restoreState(base::unique_any &&state) {
+	virtual void restoreState(
+		std::unique_ptr<SavedStateBase> state) {
 	}
 
 protected:
@@ -311,6 +307,10 @@ private:
 
 class PeerListController : public PeerListSearchDelegate {
 public:
+	struct SavedStateBase {
+		virtual ~SavedStateBase() = default;
+	};
+
 	// Search works only with RowId == peer->id.
 	PeerListController(std::unique_ptr<PeerListSearchController> searchController = nullptr);
 
@@ -343,13 +343,9 @@ public:
 		return nullptr;
 	}
 
-	virtual std::unique_ptr<PeerListState> saveState() {
+	virtual std::unique_ptr<PeerListState> saveState();
-		return delegate()->peerListSaveState();
-	}
 	virtual void restoreState(
-			std::unique_ptr<PeerListState> state) {
+		std::unique_ptr<PeerListState> state);
-		delegate()->peerListRestoreState(std::move(state));
-	}
 
 	bool isRowSelected(not_null<PeerData*> peer) {
 		return delegate()->peerListIsRowSelected(peer);
@@ -401,6 +397,17 @@ private:
 
 };
 
+struct PeerListState {
+	PeerListState() = default;
+	PeerListState(PeerListState &&other) = delete;
+	PeerListState &operator=(PeerListState &&other) = delete;
+
+	std::unique_ptr<PeerListController::SavedStateBase> controllerState;
+	std::vector<not_null<PeerData*>> list;
+	std::vector<not_null<PeerData*>> filterResults;
+	QString searchQuery;
+};
+
 class PeerListContent
 	: public Ui::RpWidget
 	, private base::Subscriber {
@@ -517,9 +524,6 @@ private:
 		Selected old;
 	};
 
-	struct EmptyControllerState {
-	};
-
 	void setSelected(Selected selected);
 	void setPressed(Selected pressed);
 	void setContexted(Selected contexted);

Telegram/SourceFiles/info/profile/info_profile_members_controllers.cpp

@@ -63,6 +63,9 @@ public:
 	void restoreState(std::unique_ptr<PeerListState> state) override;
 
 private:
+	struct SavedState : SavedStateBase {
+		rpl::lifetime lifetime;
+	};
 	void rebuildRows();
 	void refreshOnlineCount();
 	std::unique_ptr<PeerListRow> createRow(not_null<UserData*> user);
@@ -133,13 +136,13 @@ void ChatMembersController::sortByOnline() {
 
 std::unique_ptr<PeerListState> ChatMembersController::saveState() {
 	auto result = PeerListController::saveState();
-	auto lifetime = rpl::lifetime();
+	auto my = std::make_unique<SavedState>();
 	using Flag = Notify::PeerUpdate::Flag;
 	Notify::PeerUpdateViewer(_chat, Flag::MembersChanged)
 		| rpl::start_with_next([state = result.get()](auto update) {
-			state->controllerState = base::unique_any{};
+			state->controllerState = nullptr;
-		}, lifetime);
+		}, my->lifetime);
-	result->controllerState = std::move(lifetime);
+	result->controllerState = std::move(my);
 	return result;
 }
 

Telegram/SourceFiles/profile/profile_channel_controllers.cpp

@@ -251,16 +251,16 @@ std::unique_ptr<PeerListState> ParticipantsBoxController::saveState() {
 
 	auto result = PeerListController::saveState();
 
-	auto my = SavedState();
+	auto my = std::make_unique<SavedState>();
-	my.additional = std::move(_additional);
+	my->additional = std::move(_additional);
-	my.offset = _offset;
+	my->offset = _offset;
-	my.allLoaded = _allLoaded;
+	my->allLoaded = _allLoaded;
 	if (auto requestId = base::take(_loadRequestId)) {
 		request(requestId).cancel();
-		my.wasLoading = true;
+		my->wasLoading = true;
 	}
 	if (auto search = searchController()) {
-		my.searchState = search->saveState();
+		my->searchState = search->saveState();
 	}
 
 	auto weak = result.get();
@@ -278,7 +278,7 @@ std::unique_ptr<PeerListState> ParticipantsBoxController::saveState() {
 			base::stable_partition(weak->list, [user](not_null<PeerData*> peer) {
 				return (peer == user);
 			});
-		}, my.lifetime);
+		}, my->lifetime);
 	Auth().data().megagroupParticipantRemoved(_channel)
 		| rpl::start_with_next([weak](not_null<UserData*> user) {
 			weak->list.erase(std::remove(
@@ -289,7 +289,7 @@ std::unique_ptr<PeerListState> ParticipantsBoxController::saveState() {
 				weak->filterResults.begin(),
 				weak->filterResults.end(),
 				user), weak->filterResults.end());
-		}, my.lifetime);
+		}, my->lifetime);
 
 	result->controllerState = std::move(my);
 	return result;
@@ -297,8 +297,10 @@ std::unique_ptr<PeerListState> ParticipantsBoxController::saveState() {
 
 void ParticipantsBoxController::restoreState(
 		std::unique_ptr<PeerListState> state) {
-	auto typeErasedState = &state->controllerState;
+	auto typeErasedState = state
-	if (auto my = base::any_cast<SavedState>(typeErasedState)) {
+		? state->controllerState.get()
+		: nullptr;
+	if (auto my = dynamic_cast<SavedState*>(typeErasedState)) {
 		if (auto requestId = base::take(_loadRequestId)) {
 			request(requestId).cancel();
 		}
@@ -851,21 +853,22 @@ void ParticipantsBoxSearchController::searchQuery(const QString &query) {
 	}
 }
 
-base::unique_any ParticipantsBoxSearchController::saveState() {
+auto ParticipantsBoxSearchController::saveState()
-	auto result = SavedState();
+-> std::unique_ptr<SavedStateBase> {
-	result.query = _query;
+	auto result = std::make_unique<SavedState>();
-	result.offset = _offset;
+	result->query = _query;
-	result.allLoaded = _allLoaded;
+	result->offset = _offset;
+	result->allLoaded = _allLoaded;
 	if (auto requestId = base::take(_requestId)) {
 		request(requestId).cancel();
-		result.wasLoading = true;
+		result->wasLoading = true;
 	}
-	return result;
+	return std::move(result);
 }
 
 void ParticipantsBoxSearchController::restoreState(
-		base::unique_any &&state) {
+		std::unique_ptr<SavedStateBase> state) {
-	if (auto my = base::any_cast<SavedState>(&state)) {
+	if (auto my = dynamic_cast<SavedState*>(state.get())) {
 		if (auto requestId = base::take(_requestId)) {
 			request(requestId).cancel();
 		}

Telegram/SourceFiles/profile/profile_channel_controllers.h

@@ -102,8 +102,8 @@ protected:
 	virtual std::unique_ptr<PeerListRow> createRow(not_null<UserData*> user) const;
 
 private:
-	struct SavedState {
+	struct SavedState : SavedStateBase {
-		base::unique_any searchState;
+		std::unique_ptr<PeerListSearchController::SavedStateBase> searchState;
 		int offset = 0;
 		bool allLoaded = false;
 		bool wasLoading = false;
@@ -150,7 +150,9 @@ private:
 };
 
 // Members, banned and restricted users server side search.
-class ParticipantsBoxSearchController : public PeerListSearchController, private MTP::Sender {
+class ParticipantsBoxSearchController
+	: public PeerListSearchController
+	, private MTP::Sender {
 public:
 	using Role = ParticipantsBoxController::Role;
 	using Additional = ParticipantsBoxController::Additional;
@@ -161,11 +163,11 @@ public:
 	bool isLoading() override;
 	bool loadMoreRows() override;
 
-	base::unique_any saveState() override;
+	std::unique_ptr<SavedStateBase> saveState() override;
-	void restoreState(base::unique_any &&state) override;
+	void restoreState(std::unique_ptr<SavedStateBase> state) override;
 
 private:
-	struct SavedState {
+	struct SavedState : SavedStateBase {
 		QString query;
 		int offset = 0;
 		bool allLoaded = false;

Telegram/SourceFiles/stdafx.h

@@ -84,7 +84,6 @@ namespace func = base::functors;
 
 #include "base/flat_set.h"
 #include "base/flat_map.h"
-#include "base/unique_any.h"
 
 #include "core/basic_types.h"
 #include "logs.h"