Clang: Improve interfaces

The interfaces should never used to handle ownership. So it is now using
protected destructors. Copy operations are forbidden too.

https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#c35-a-base-class-destructor-should-be-either-public-and-virtual-or-protected-and-nonvirtual

Change-Id: Ib0b60a73a7ec130973b5cb0095cc5b2f10fa0758
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>

src/libs/clangsupport/baseserverproxy.h

@@ -45,6 +45,9 @@ public:
 
     void setIoDevice(QIODevice *ioDevice);
 
+protected:
+    ~BaseServerProxy() = default;
+
 protected:
     ClangBackEnd::WriteMessageBlock m_writeMessageBlock;
     ClangBackEnd::ReadMessageBlock m_readMessageBlock;

src/libs/clangsupport/clangcodemodelclientinterface.h

@@ -63,6 +63,9 @@ public:
     virtual void references(const ReferencesMessage &message) = 0;
     virtual void followSymbol(const FollowSymbolMessage &message) = 0;
     virtual void tooltip(const ToolTipMessage &message) = 0;
+
+protected:
+    ~ClangCodeModelClientInterface() = default;
 };
 
 } // namespace ClangBackEnd

src/libs/clangsupport/clangpathwatcherinterface.h

@@ -33,15 +33,20 @@ namespace ClangBackEnd {
 
 class ClangPathWatcherNotifier;
 
-class CLANGSUPPORT_EXPORT ClangPathWatcherInterface
+class ClangPathWatcherInterface
 {
 public:
-    virtual ~ClangPathWatcherInterface();
+    ClangPathWatcherInterface() = default;
+    ClangPathWatcherInterface(const ClangPathWatcherInterface &) = delete;
+    ClangPathWatcherInterface &operator=(const ClangPathWatcherInterface &) = delete;
 
     virtual void updateIdPaths(const std::vector<IdPaths> &idPaths) = 0;
     virtual void removeIds(const Utils::SmallStringVector &ids) = 0;
 
     virtual void setNotifier(ClangPathWatcherNotifier *notifier) = 0;
+
+protected:
+    ~ClangPathWatcherInterface() = default;
 };
 
 } // namespace ClangBackEnd

src/libs/clangsupport/clangpathwatchernotifier.h

@@ -33,16 +33,18 @@
 
 namespace ClangBackEnd {
 
-class CLANGSUPPORT_EXPORT ClangPathWatcherNotifier
+class ClangPathWatcherNotifier
 {
 public:
     ClangPathWatcherNotifier() = default;
-    virtual ~ClangPathWatcherNotifier();
     ClangPathWatcherNotifier(const ClangPathWatcherNotifier &) = delete;
-    void operator=(const ClangPathWatcherNotifier &) = delete;
+    ClangPathWatcherNotifier &operator=(const ClangPathWatcherNotifier &) = delete;
 
     virtual void pathsWithIdsChanged(const Utils::SmallStringVector &ids) = 0;
     virtual void pathsChanged(const FilePathIds &filePathIds) = 0;
+
+protected:
+    ~ClangPathWatcherNotifier() = default;
 };
 
 } // namespace ClangBackEnd

src/libs/clangsupport/clangsupport-lib.pri

@@ -16,8 +16,6 @@ SOURCES += \
     $$PWD/clangcodemodelconnectionclient.cpp \
     $$PWD/clangcodemodelserverinterface.cpp \
     $$PWD/clangcodemodelserverproxy.cpp \
-    $$PWD/clangpathwatcherinterface.cpp \
-    $$PWD/clangpathwatchernotifier.cpp \
     $$PWD/cmbalivemessage.cpp \
     $$PWD/cmbcodecompletedmessage.cpp \
     $$PWD/cmbcompletecodemessage.cpp \
@@ -41,9 +39,6 @@ SOURCES += \
     $$PWD/filepath.cpp \
     $$PWD/fixitcontainer.cpp \
     $$PWD/followsymbolmessage.cpp \
-    $$PWD/ipcclientinterface.cpp \
-    $$PWD/ipcinterface.cpp \
-    $$PWD/ipcserverinterface.cpp \
     $$PWD/lineprefixer.cpp \
     $$PWD/messageenvelop.cpp \
     $$PWD/pchmanagerclientinterface.cpp \
@@ -92,8 +87,7 @@ SOURCES += \
     $$PWD/writemessageblock.cpp \
     $$PWD/filepathcaching.cpp \
     $$PWD/filepathid.cpp \
-    $$PWD/baseserverproxy.cpp \
-    $$PWD/projectpartpchproviderinterface.cpp
+    $$PWD/baseserverproxy.cpp
 
 HEADERS += \
     $$PWD/cancelmessage.h \

src/libs/clangsupport/connectionclient.h

@@ -54,7 +54,9 @@ class CLANGSUPPORT_EXPORT ConnectionClient : public QObject
 
 public:
     ConnectionClient(const QString &connectionName);
-    virtual ~ConnectionClient();
+
+    ConnectionClient(const ConnectionClient &) = delete;
+    ConnectionClient &operator=(const ConnectionClient &) = delete;
 
     void startProcessAndConnectToServerAsynchronously();
     void disconnectFromServer();
@@ -82,6 +84,9 @@ signals:
     void disconnectedFromLocalSocket();
     void processFinished();
 
+protected:
+    ~ConnectionClient();
+
 protected:
     QIODevice *ioDevice();
     const QTemporaryDir &temporaryDirectory() const;

src/libs/clangsupport/filepathcache.h

@@ -36,7 +36,7 @@
 namespace ClangBackEnd {
 
 template <typename FilePathStorage>
-class CLANGSUPPORT_GCCEXPORT FilePathCache
+class FilePathCache
 {
     using DirectoryPathCache = StringCache<Utils::PathString,
                                            int,
@@ -53,6 +53,9 @@ public:
         : m_filePathStorage(filePathStorage)
     {}
 
+    FilePathCache(const FilePathCache &) = delete;
+    FilePathCache &operator=(const FilePathCache &) = delete;
+
     FilePathId filePathId(FilePathView filePath) const
     {
         Utils::SmallStringView directoryPath = filePath.directory();

src/libs/clangsupport/filepathcachinginterface.h

@@ -34,6 +34,10 @@ namespace ClangBackEnd {
 class FilePathCachingInterface
 {
 public:
+    FilePathCachingInterface() = default;
+    FilePathCachingInterface(const FilePathCachingInterface &) = delete;
+    FilePathCachingInterface &operator=(const FilePathCachingInterface &) = delete;
+
     virtual FilePathId filePathId(FilePathView filePath) const = 0;
     virtual FilePath filePath(FilePathId filePathId) const = 0;
 
@@ -69,6 +73,9 @@ public:
 
         return filePaths;
     }
+
+protected:
+    ~FilePathCachingInterface() = default;
 };
 
 } // namespace ClangBackEnd

src/libs/clangsupport/ipcclientinterface.h

@@ -29,10 +29,10 @@
 
 namespace ClangBackEnd {
 
-class CLANGSUPPORT_EXPORT IpcClientInterface : public IpcInterface
+class IpcClientInterface : public IpcInterface
 {
-public:
-    IpcClientInterface();
+protected:
+    ~IpcClientInterface() = default;
 };
 
 } // namespace ClangBackEnd

src/libs/clangsupport/ipcinterface.h

@@ -33,11 +33,17 @@ namespace ClangBackEnd {
 
 class MessageEnvelop;
 
-class CLANGSUPPORT_EXPORT IpcInterface
+class IpcInterface
 {
 public:
-    virtual ~IpcInterface();
+    IpcInterface() = default;
+    IpcInterface(const IpcInterface &) = delete;
+    IpcInterface &operator=(const IpcInterface &) = delete;
+
     virtual void dispatch(const MessageEnvelop &messageEnvelop) = 0;
+
+protected:
+    ~IpcInterface() = default;
 };
 
 } // namespace ClangBackEnd

src/libs/clangsupport/ipcserverinterface.h

@@ -31,6 +31,8 @@ namespace ClangBackEnd {
 
 class IpcServerInterface : public IpcInterface
 {
+protected:
+    ~IpcServerInterface() = default;
 };
 
 } // namespace ClangBackEnd

src/libs/clangsupport/pchmanagerclientinterface.h

@@ -38,6 +38,9 @@ public:
 
     virtual void alive() = 0;
     virtual void precompiledHeadersUpdated(PrecompiledHeadersUpdatedMessage &&message) = 0;
+
+protected:
+    ~PchManagerClientInterface() = default;
 };
 
 } // namespace ClangBackEnd

src/libs/clangsupport/pchmanagerserverinterface.h

@@ -41,6 +41,9 @@ public:
     void dispatch(const MessageEnvelop &messageEnvelop) override;
 
     virtual void end() = 0;
+
+protected:
+    ~PchManagerServerInterface() = default;
 };
 
 } // namespace ClangBackEnd

src/libs/clangsupport/projectmanagementserverinterface.h

@@ -32,11 +32,14 @@ namespace ClangBackEnd {
 class RemoveProjectPartsMessage;
 class UpdateProjectPartsMessage;
 
-class CLANGSUPPORT_EXPORT ProjectManagementServerInterface : public IpcInterface
+class ProjectManagementServerInterface : public IpcInterface
 {
 public:
     virtual void updateProjectParts(UpdateProjectPartsMessage &&message) = 0;
     virtual void removeProjectParts(RemoveProjectPartsMessage &&message) = 0;
+
+protected:
+    ~ProjectManagementServerInterface() = default;
 };
 
 } // namespace ClangBackEnd

src/libs/clangsupport/projectpartpchproviderinterface.cpp

@@ -1,34 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of Qt Creator.
-**
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 3 as published by the Free Software
-** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-3.0.html.
-**
-****************************************************************************/
-
-#include "projectpartpchproviderinterface.h"
-
-namespace ClangBackEnd {
-
-ProjectPartPchProviderInterface::~ProjectPartPchProviderInterface()
-{
-}
-
-} // namespace ClangBackEnd

src/libs/clangsupport/projectpartpchproviderinterface.h

@@ -31,14 +31,20 @@
 
 namespace ClangBackEnd {
 
-class CLANGSUPPORT_EXPORT ProjectPartPchProviderInterface
+class ProjectPartPchProviderInterface
 {
 public:
-    virtual ~ProjectPartPchProviderInterface();
+    ProjectPartPchProviderInterface() = default;
+    ProjectPartPchProviderInterface(const ProjectPartPchProviderInterface &) = delete;
+    ProjectPartPchProviderInterface &operator=(const ProjectPartPchProviderInterface &) = delete;
+
     virtual Utils::optional<ClangBackEnd::ProjectPartPch> projectPartPch(
             Utils::SmallStringView projectPartId) const = 0;
-   virtual  const ClangBackEnd::ProjectPartPchs &projectPartPchs() const = 0;
+    virtual const ClangBackEnd::ProjectPartPchs &projectPartPchs() const = 0;
 
+
+protected:
+    ~ProjectPartPchProviderInterface() = default;
 };
 
 } // namespace ClangBackEnd

src/libs/clangsupport/refactoringclientinterface.h

@@ -51,6 +51,9 @@ public:
     virtual void sourceRangesForQueryMessage(SourceRangesForQueryMessage &&message) = 0;
 
     virtual void setLocalRenamingCallback(RenameCallback &&localRenamingCallback) = 0;
+
+protected:
+    ~RefactoringClientInterface() = default;
 };
 
 } // namespace ClangBackEnd

src/libs/clangsupport/refactoringserverinterface.h

@@ -60,6 +60,9 @@ public:
         isAvailable_ = isAvailable;
     }
 
+protected:
+    ~RefactoringServerInterface() = default;
+
 private:
     bool isAvailable_ = false;
 };

src/libs/clangsupport/stringcache.h

@@ -131,6 +131,9 @@ public:
         m_indices.reserve(reserveSize);
     }
 
+    StringCache(const StringCache &) = delete;
+    StringCache &operator=(const StringCache &) = delete;
+
     void populate(CacheEntries &&entries)
     {
         uncheckedPopulate(std::move(entries));

src/libs/sqlite/sqlite-lib.pri

@@ -17,7 +17,6 @@ SOURCES += \
     $$PWD/sqliteglobal.cpp \
     $$PWD/sqlitereadstatement.cpp \
     $$PWD/sqlitereadwritestatement.cpp \
-    $$PWD/sqlitetransaction.cpp \
     $$PWD/sqlitewritestatement.cpp \
     $$PWD/sqlstatementbuilder.cpp \
     $$PWD/sqlstatementbuilderexception.cpp \

src/libs/sqlite/sqlitebasestatement.h

@@ -53,6 +53,9 @@ class SQLITE_EXPORT BaseStatement
 public:
     explicit BaseStatement(Utils::SmallStringView sqlStatement, Database &database);
 
+    BaseStatement(const BaseStatement &) = delete;
+    BaseStatement &operator=(const BaseStatement &) = delete;
+
     static void deleteCompiledStatement(sqlite3_stmt *m_compiledStatement);
 
     bool next() const;
@@ -123,6 +126,9 @@ public:
 
     Database &database() const;
 
+protected:
+    ~BaseStatement() = default;
+
 private:
     std::unique_ptr<sqlite3_stmt, void (*)(sqlite3_stmt*)> m_compiledStatement;
     Database &m_database;
@@ -146,7 +152,7 @@ extern template SQLITE_EXPORT Utils::SmallString BaseStatement::fetchValue<Utils
 extern template SQLITE_EXPORT Utils::PathString BaseStatement::fetchValue<Utils::PathString>(int column) const;
 
 template <typename BaseStatement>
-class SQLITE_EXPORT StatementImplementation : public BaseStatement
+class StatementImplementation : public BaseStatement
 {
 
 public:
@@ -290,6 +296,8 @@ public:
         return statement.template fetchValue<Type>(0);
     }
 
+protected:
+    ~StatementImplementation() = default;
 
 private:
     struct Resetter

src/libs/sqlite/sqlitedatabase.h

@@ -55,10 +55,7 @@ public:
     Database(Utils::PathString &&databaseFilePath, JournalMode journalMode=JournalMode::Wal);
 
     Database(const Database &) = delete;
-    bool operator=(const Database &) = delete;
-
-    Database(Database &&) = delete;
-    bool operator=(Database &&) = delete;
+    Database &operator=(const Database &) = delete;
 
     void open();
     void open(Utils::PathString &&databaseFilePath);

src/libs/sqlite/sqlitetransaction.h

@@ -35,11 +35,10 @@ namespace Sqlite {
 class DatabaseBackend;
 class Database;
 
-class SQLITE_EXPORT TransactionInterface
+class TransactionInterface
 {
 public:
     TransactionInterface() = default;
-    virtual ~TransactionInterface();
     TransactionInterface(const TransactionInterface &) = delete;
     TransactionInterface &operator=(const TransactionInterface &) = delete;
 
@@ -48,6 +47,9 @@ public:
     virtual void exclusiveBegin() = 0;
     virtual void commit() = 0;
     virtual void rollback() = 0;
+
+protected:
+    ~TransactionInterface() = default;
 };
 
 class AbstractTransaction
@@ -63,6 +65,7 @@ public:
     }
 
 protected:
+    ~AbstractTransaction() = default;
     AbstractTransaction(TransactionInterface &interface)
         : m_interface(interface)
     {
@@ -76,6 +79,8 @@ protected:
 class AbstractThrowingTransaction : public AbstractTransaction
 {
 public:
+    AbstractThrowingTransaction(const AbstractThrowingTransaction &) = delete;
+    AbstractThrowingTransaction &operator=(const AbstractThrowingTransaction &) = delete;
     ~AbstractThrowingTransaction() noexcept(false)
     {
         try {
@@ -97,6 +102,8 @@ protected:
 class AbstractNonThrowingDestructorTransaction : public AbstractTransaction
 {
 public:
+    AbstractNonThrowingDestructorTransaction(const AbstractNonThrowingDestructorTransaction &) = delete;
+    AbstractNonThrowingDestructorTransaction &operator=(const AbstractNonThrowingDestructorTransaction &) = delete;
     ~AbstractNonThrowingDestructorTransaction()
     {
         try {

src/plugins/clangcodemodel/clangbackendreceiver.h

@@ -46,7 +46,7 @@ class BackendReceiver : public ClangBackEnd::ClangCodeModelClientInterface
 {
 public:
     BackendReceiver();
-    ~BackendReceiver() override;
+    ~BackendReceiver();
 
     using AliveHandler = std::function<void ()>;
     void setAliveHandler(const AliveHandler &handler);

src/plugins/clangpchmanager/clangpchmanager-source.pri

@@ -22,6 +22,5 @@ SOURCES += \
     $$PWD/pchmanagernotifierinterface.cpp \
     $$PWD/pchmanagerconnectionclient.cpp \
     $$PWD/projectupdater.cpp \
-    $$PWD/pchmanagerprojectupdater.cpp \
-    $$PWD/precompiledheaderstorageinterface.cpp
+    $$PWD/pchmanagerprojectupdater.cpp
 

src/plugins/clangpchmanager/clangpchmanagerplugin.cpp

@@ -73,7 +73,7 @@ ClangPchManagerPlugin::~ClangPchManagerPlugin() = default;
 
 bool ClangPchManagerPlugin::initialize(const QStringList & /*arguments*/, QString * /*errorMessage*/)
 {
-    d.reset(new ClangPchManagerPluginData);
+    d = std::make_unique<ClangPchManagerPluginData>();
 
     startBackend();
 

src/plugins/clangpchmanager/pchmanagernotifierinterface.h

@@ -37,17 +37,18 @@ class CLANGPCHMANAGER_EXPORT PchManagerNotifierInterface
 {
 public:
     PchManagerNotifierInterface(PchManagerClient &pchManagerClient);
+    PchManagerNotifierInterface(const PchManagerNotifierInterface &) = delete;
+    PchManagerNotifierInterface &operator=(const PchManagerNotifierInterface &) = delete;
 
-    virtual ~PchManagerNotifierInterface();
     virtual void precompiledHeaderUpdated(const QString &projectPartId,
                                           const QString &pchFilePath,
                                           long long lastModified) = 0;
     virtual void precompiledHeaderRemoved(const QString &projectPartId) = 0;
 
-    PchManagerNotifierInterface(const PchManagerNotifierInterface &) = delete;
-    void operator=(const PchManagerNotifierInterface &) const = delete;
-
     PchManagerClient &m_pchManagerClient;
+
+protected:
+    ~PchManagerNotifierInterface();
 };
 
 } // namespace ClangPchManager

src/plugins/clangpchmanager/precompiledheaderstorageinterface.cpp

@@ -1,32 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2017 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of Qt Creator.
-**
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 3 as published by the Free Software
-** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-3.0.html.
-**
-****************************************************************************/
-
-#include "precompiledheaderstorageinterface.h"
-
-namespace ClangPchManager {
-
-PrecompiledHeaderStorageInterface::~PrecompiledHeaderStorageInterface() = default;
-
-} // namespace ClangPchManager

src/plugins/clangpchmanager/precompiledheaderstorageinterface.h

@@ -33,7 +33,6 @@ class PrecompiledHeaderStorageInterface
 {
 public:
     PrecompiledHeaderStorageInterface() = default;
-    virtual ~PrecompiledHeaderStorageInterface();
 
     PrecompiledHeaderStorageInterface(const PrecompiledHeaderStorageInterface&) = delete;
     PrecompiledHeaderStorageInterface &operator=(const PrecompiledHeaderStorageInterface&) = delete;
@@ -43,6 +42,9 @@ public:
                                          long long pchBuildTime) = 0;
 
     virtual void deletePrecompiledHeader(Utils::SmallStringView projectPartName) = 0;
+
+protected:
+    ~PrecompiledHeaderStorageInterface() = default;
 };
 
 } // namespace ClangPchManager

src/plugins/clangrefactoring/clangrefactoring-source.pri

@@ -39,7 +39,5 @@ SOURCES += \
     $$PWD/refactoringconnectionclient.cpp \
     $$PWD/refactoringengine.cpp \
     $$PWD/refactoringprojectupdater.cpp \
-    $$PWD/searchinterface.cpp \
     $$PWD/searchhandle.cpp \
-    $$PWD/symbolsfindfilter.cpp \
-    $$PWD/projectpartproviderinterface.cpp
+    $$PWD/symbolsfindfilter.cpp

src/plugins/clangrefactoring/projectpartproviderinterface.cpp

@@ -1,32 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2017 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of Qt Creator.
-**
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 3 as published by the Free Software
-** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-3.0.html.
-**
-****************************************************************************/
-
-#include "projectpartproviderinterface.h"
-
-namespace ClangRefactoring {
-
-ProjectPartProviderInterface::~ProjectPartProviderInterface() = default;
-
-} // namespace ClangRefactoring

src/plugins/clangrefactoring/projectpartproviderinterface.h

@@ -39,7 +39,6 @@ class ProjectPartProviderInterface
 {
 public:
     ProjectPartProviderInterface() = default;
-    virtual ~ProjectPartProviderInterface();
 
     ProjectPartProviderInterface(const ProjectPartProviderInterface&) = delete;
     ProjectPartProviderInterface& operator=(const ProjectPartProviderInterface&) = delete;
@@ -49,6 +48,9 @@ public:
 
     virtual CppTools::ProjectPart *projectPart(const QString &projectPartId) const = 0;
     virtual ClangBackEnd::V2::FileContainers generatedFiles() const = 0;
+
+protected:
+    ~ProjectPartProviderInterface() = default;
 };
 
 } // namespace ClangRefactoring

src/plugins/clangrefactoring/searchhandle.h

@@ -34,6 +34,10 @@ namespace ClangRefactoring {
 class SearchHandle
 {
 public:
+    SearchHandle() = default;
+    SearchHandle(const SearchHandle &) = delete;
+    SearchHandle &operator=(const SearchHandle &) = delete;
+
     virtual ~SearchHandle();
 
     virtual void addResult(const QString &fileName,

src/plugins/clangrefactoring/searchinterface.h

@@ -36,9 +36,15 @@ namespace ClangRefactoring {
 class SearchInterface
 {
 public:
-    virtual ~SearchInterface();
+    SearchInterface() = default;
+    SearchInterface(const SearchInterface &) = delete;
+    SearchInterface &operator=(const SearchInterface &) = delete;
+
     virtual std::unique_ptr<SearchHandle> startNewSearch(const QString &searchLabel,
-                                                                  const QString &searchTerm) = 0;
+                                                         const QString &searchTerm) = 0;
+
+protected:
+    ~SearchInterface() = default;
 };
 
 } // namespace ClangRefactoring

src/plugins/clangrefactoring/symbolqueryinterface.h

@@ -47,7 +47,10 @@ enum class SymbolType
 class SymbolQueryInterface
 {
 public:
-    virtual ~SymbolQueryInterface() {}
+    SymbolQueryInterface() = default;
+    SymbolQueryInterface(const SymbolQueryInterface &) = delete;
+    SymbolQueryInterface &operator=(const SymbolQueryInterface &) = delete;
+
     virtual SourceLocations locationsAt(ClangBackEnd::FilePathId filePathId,
                                         int line,
                                         int utf8Column) const = 0;
@@ -57,6 +60,9 @@ public:
     virtual Symbols symbolsContaining(SymbolType symbolType,
                                       Utils::SmallStringView regularExpression) const = 0;
     virtual Functions functionsContaining(Utils::SmallStringView regularExpression) const = 0;
+
+protected:
+    ~SymbolQueryInterface() = default;
 };
 
 } // namespace ClangRefactoring

src/tools/clangpchmanagerbackend/source/clangpchmanagerbackend-source.pri

@@ -2,11 +2,7 @@ INCLUDEPATH += $$PWD
 
 SOURCES += \
     $$PWD/pchmanagerserver.cpp \
-    $$PWD/projectparts.cpp \
-    $$PWD/pchcreatorinterface.cpp \
-    $$PWD/projectpartsinterface.cpp \
-    $$PWD/pchgeneratornotifierinterface.cpp \
-    $$PWD/pchgeneratorinterface.cpp
+    $$PWD/projectparts.cpp
 
 HEADERS += \
     $$PWD/pchmanagerserver.h \

src/tools/clangpchmanagerbackend/source/environment.h

@@ -32,10 +32,16 @@ namespace ClangBackEnd {
 class Environment
 {
 public:
-    virtual ~Environment() = default;
+    Environment() = default;
+    Environment(const Environment &) = delete;
+    Environment &operator=(const Environment &) = delete;
+
     virtual QString pchBuildDirectory() const = 0;
     virtual QString clangCompilerPath() const = 0;
     virtual uint hardwareConcurrency() const = 0;
+
+protected:
+    ~Environment() = default;
 };
 
 } // namespace ClangBackEnd

src/tools/clangpchmanagerbackend/source/pchcreatorinterface.cpp

@@ -1,35 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of Qt Creator.
-**
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 3 as published by the Free Software
-** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-3.0.html.
-**
-****************************************************************************/
-
-#include "pchcreatorinterface.h"
-
-namespace ClangBackEnd {
-
-PchCreatorInterface::~PchCreatorInterface()
-{
-
-}
-
-} // namespace ClangBackEnd

src/tools/clangpchmanagerbackend/source/pchcreatorinterface.h

@@ -36,11 +36,16 @@ namespace ClangBackEnd {
 class PchCreatorInterface
 {
 public:
-    virtual ~PchCreatorInterface();
+    PchCreatorInterface() = default;
+    PchCreatorInterface(const PchCreatorInterface &) = delete;
+    PchCreatorInterface &operator=(const PchCreatorInterface &) = delete;
 
     virtual void generatePchs(V2::ProjectPartContainers &&projectsParts) = 0;
     virtual void setGeneratedFiles(V2::FileContainers &&generatedFiles) = 0;
     virtual std::vector<IdPaths> takeProjectsIncludes() = 0;
+
+protected:
+    ~PchCreatorInterface() = default;
 };
 
 } // namespace ClangBackEnd

src/tools/clangpchmanagerbackend/source/pchgeneratorinterface.cpp

@@ -1,31 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of Qt Creator.
-**
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 3 as published by the Free Software
-** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-3.0.html.
-**
-****************************************************************************/
-
-#include "pchgeneratorinterface.h"
-
-ClangBackEnd::PchGeneratorInterface::~PchGeneratorInterface()
-{
-
-}

src/tools/clangpchmanagerbackend/source/pchgeneratorinterface.h

@@ -34,11 +34,15 @@ class ProjectPartPch;
 class PchGeneratorInterface
 {
 public:
-    virtual ~PchGeneratorInterface();
+    PchGeneratorInterface() = default;
+    PchGeneratorInterface(const PchGeneratorInterface &) = delete;
+    PchGeneratorInterface &operator=(const PchGeneratorInterface &) = delete;
 
     virtual void startTask(Utils::SmallStringVector &&compilerArguments,
                            ProjectPartPch &&projectPartPch) = 0;
 
+protected:
+    ~PchGeneratorInterface() = default;
 };
 
 } // namespace ClangBackEnd

src/tools/clangpchmanagerbackend/source/pchgeneratornotifierinterface.cpp

@@ -1,53 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of Qt Creator.
-**
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 3 as published by the Free Software
-** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-3.0.html.
-**
-****************************************************************************/
-
-#include "pchgeneratornotifierinterface.h"
-
-#include <ostream>
-
-namespace ClangBackEnd {
-
-PchGeneratorNotifierInterface::~PchGeneratorNotifierInterface()
-{
-
-}
-
-std::ostream &operator<<(std::ostream &out, TaskFinishStatus status)
-{
-    enum class TaskFinishStatus
-    {
-        Successfully,
-        Unsuccessfully
-    };
-
-    if (status == ClangBackEnd::TaskFinishStatus::Successfully)
-        out << "Successfully";
-    else
-        out << "Unsuccessfully";
-
-    return out;
-}
-
-} // namespace ClangBackEnd

src/tools/clangpchmanagerbackend/source/pchgeneratornotifierinterface.h

@@ -40,11 +40,14 @@ enum class TaskFinishStatus
 class PchGeneratorNotifierInterface
 {
 public:
-    virtual ~PchGeneratorNotifierInterface();
+    PchGeneratorNotifierInterface() = default;
+    PchGeneratorNotifierInterface(const PchGeneratorNotifierInterface &) = delete;
+    PchGeneratorNotifierInterface &operator=(const PchGeneratorNotifierInterface &) = delete;
 
     virtual void taskFinished(TaskFinishStatus status, const ProjectPartPch &projectPartPch) = 0;
+
+protected:
+    ~PchGeneratorNotifierInterface() = default;
 };
 
-std::ostream &operator<<(std::ostream &out, TaskFinishStatus status);
-
 } // namespace ClangBackEnd

src/tools/clangpchmanagerbackend/source/projectpartsinterface.cpp

@@ -1,34 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of Qt Creator.
-**
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 3 as published by the Free Software
-** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-3.0.html.
-**
-****************************************************************************/
-
-#include "projectpartsinterface.h"
-
-namespace ClangBackEnd {
-
-ProjectPartsInterface::~ProjectPartsInterface()
-{
-}
-
-} // namespace ClangBackEnd

src/tools/clangpchmanagerbackend/source/projectpartsinterface.h

@@ -32,11 +32,16 @@ namespace ClangBackEnd {
 class ProjectPartsInterface
 {
 public:
-    virtual ~ProjectPartsInterface();
+    ProjectPartsInterface() = default;
+    ProjectPartsInterface(const ProjectPartsInterface &) = delete;
+    ProjectPartsInterface &operator=(const ProjectPartsInterface &) = delete;
 
     virtual V2::ProjectPartContainers update(V2::ProjectPartContainers &&projectsParts) = 0;
     virtual void remove(const Utils::SmallStringVector &projectPartIds) = 0;
     virtual V2::ProjectPartContainers projects(const Utils::SmallStringVector &projectPartIds) const = 0;
+
+protected:
+    ~ProjectPartsInterface() = default;
 };
 
 } // namespace ClangBackEnd

src/tools/clangrefactoringbackend/source/clangrefactoringbackend-source.pri

@@ -67,6 +67,5 @@ SOURCES += \
     $$PWD/sourcerangefilter.cpp \
     $$PWD/symbolindexer.cpp \
     $$PWD/symbolentry.cpp \
-    $$PWD/symbolstorageinterface.cpp \
     $$PWD/projectpartartefact.cpp \
     $$PWD/filestatuscache.cpp

src/tools/clangrefactoringbackend/source/filestatuscache.h

@@ -56,6 +56,8 @@ public:
     using size_type = Internal::FileStatusCacheEntries::size_type;
 
     FileStatusCache(FilePathCachingInterface &filePathCache);
+    FileStatusCache &operator=(const FileStatusCache &) = delete;
+    FileStatusCache(const FileStatusCache &) = delete;
 
     long long lastModifiedTime(ClangBackEnd::FilePathId filePathId) const;
     void update(ClangBackEnd::FilePathId filePathId);

src/tools/clangrefactoringbackend/source/symbolindexing.cpp

@@ -27,4 +27,9 @@
 
 namespace ClangBackEnd {
 
+void SymbolIndexing::updateProjectParts(V2::ProjectPartContainers &&projectParts, V2::FileContainers &&generatedFiles)
+{
+    m_indexer.updateProjectParts(std::move(projectParts), std::move(generatedFiles));
+}
+
 } // namespace ClangBackEnd

src/tools/clangrefactoringbackend/source/symbolindexing.h

@@ -62,10 +62,7 @@ public:
     }
 
     void updateProjectParts(V2::ProjectPartContainers &&projectParts,
-                            V2::FileContainers &&generatedFiles)
-    {
-        m_indexer.updateProjectParts(std::move(projectParts), std::move(generatedFiles));
-    }
+                            V2::FileContainers &&generatedFiles);
 
 private:
     FilePathCachingInterface &m_filePathCache;

src/tools/clangrefactoringbackend/source/symbolindexinginterface.h

@@ -33,8 +33,15 @@ namespace ClangBackEnd {
 class SymbolIndexingInterface
 {
 public:
+    SymbolIndexingInterface() = default;
+    SymbolIndexingInterface(const SymbolIndexingInterface&) = delete;
+    SymbolIndexingInterface &operator=(const SymbolIndexingInterface&) = delete;
+
     virtual void updateProjectParts(V2::ProjectPartContainers &&projectParts,
                                     V2::FileContainers &&generatedFiles) = 0;
+
+protected:
+    ~SymbolIndexingInterface() = default;
 };
 
 } // namespace ClangBackEnd

src/tools/clangrefactoringbackend/source/symbolscollectorinterface.h

@@ -43,6 +43,10 @@ namespace ClangBackEnd {
 class SymbolsCollectorInterface
 {
 public:
+    SymbolsCollectorInterface() = default;
+    SymbolsCollectorInterface(const SymbolsCollectorInterface &) = delete;
+    SymbolsCollectorInterface &operator=(const SymbolsCollectorInterface &) = delete;
+
     virtual void addFiles(const FilePathIds &filePathIds,
                           const Utils::SmallStringVector &arguments) = 0;
 
@@ -58,6 +62,9 @@ public:
     virtual const UsedMacros &usedMacros() const = 0;
     virtual const FileStatuses &fileStatuses() const = 0;
     virtual const SourceDependencies &sourceDependencies() const = 0;
+
+protected:
+    ~SymbolsCollectorInterface() = default;
 };
 
 } // namespace ClangBackEnd

src/tools/clangrefactoringbackend/source/symbolstorageinterface.h

@@ -44,7 +44,6 @@ class SymbolStorageInterface
 {
 public:
     SymbolStorageInterface() = default;
-    virtual ~SymbolStorageInterface();
     SymbolStorageInterface(const SymbolStorageInterface &) = delete;
     SymbolStorageInterface &operator=(const SymbolStorageInterface &) = delete;
 
@@ -65,6 +64,9 @@ public:
     virtual Utils::optional<ProjectPartArtefact> fetchProjectPartArtefact(Utils::SmallStringView projectPartName) const = 0;
     virtual long long fetchLowestLastModifiedTime(FilePathId sourceId) const = 0;
     virtual Utils::optional<ProjectPartPch> fetchPrecompiledHeader(int projectPartId) const = 0;
+
+protected:
+    ~SymbolStorageInterface() = default;
 };
 
 } // namespace ClangBackEnd