CppTools: modernize

Change-Id: Iaf02e4d026f1ac8b216833d83cd7a735e21ff60a
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

116 files changed, 461 insertions, 555 deletions

diff --git a/src/plugins/clangcodemodel/clangeditordocumentprocessor.cpp b/src/plugins/clangcodemodel/clangeditordocumentprocessor.cpp
index b5893947b7..f7bf55a242 100644
--- a/src/plugins/clangcodemodel/clangeditordocumentprocessor.cpp
+++ b/src/plugins/clangcodemodel/clangeditordocumentprocessor.cpp
@@ -323,7 +323,7 @@ void ClangEditorDocumentProcessor::invalidateDiagnostics()
 }
 
 void ClangEditorDocumentProcessor::setParserConfig(
-        const CppTools::BaseEditorDocumentParser::Configuration config)
+        const CppTools::BaseEditorDocumentParser::Configuration &config)
 {
     m_parser->setConfiguration(config);
     m_builtinProcessor.parser()->setConfiguration(config);
diff --git a/src/plugins/clangcodemodel/clangeditordocumentprocessor.h b/src/plugins/clangcodemodel/clangeditordocumentprocessor.h
index 78d777ddfa..a7da1bb2e1 100644
--- a/src/plugins/clangcodemodel/clangeditordocumentprocessor.h
+++ b/src/plugins/clangcodemodel/clangeditordocumentprocessor.h
@@ -88,7 +88,7 @@ public:
 
     void editorDocumentTimerRestarted() override;
 
-    void setParserConfig(const CppTools::BaseEditorDocumentParser::Configuration config) override;
+    void setParserConfig(const CppTools::BaseEditorDocumentParser::Configuration &config) override;
 
     QFuture<CppTools::CursorInfo> cursorInfo(const CppTools::CursorInfoParams &params) override;
     QFuture<CppTools::CursorInfo> requestLocalReferences(const QTextCursor &cursor) override;
diff --git a/src/plugins/cpptools/abstracteditorsupport.cpp b/src/plugins/cpptools/abstracteditorsupport.cpp
index c2f435b171..22a4c304d5 100644
--- a/src/plugins/cpptools/abstracteditorsupport.cpp
+++ b/src/plugins/cpptools/abstracteditorsupport.cpp
@@ -65,7 +65,7 @@ QString AbstractEditorSupport::licenseTemplate(const QString &file, const QStrin
     expander.registerVariable("Cpp:License:ClassName", tr("The class name."),
                               [className]() { return className; });
 
-    return Utils::TemplateEngine::processText(&expander, license, 0);
+    return Utils::TemplateEngine::processText(&expander, license, nullptr);
 }
 
 } // namespace CppTools
diff --git a/src/plugins/cpptools/baseeditordocumentparser.cpp b/src/plugins/cpptools/baseeditordocumentparser.cpp
index 1068a90e9f..f0c7d9f680 100644
--- a/src/plugins/cpptools/baseeditordocumentparser.cpp
+++ b/src/plugins/cpptools/baseeditordocumentparser.cpp
@@ -58,9 +58,7 @@ BaseEditorDocumentParser::BaseEditorDocumentParser(const QString &filePath)
     Q_UNUSED(meta);
 }
 
-BaseEditorDocumentParser::~BaseEditorDocumentParser()
-{
-}
+BaseEditorDocumentParser::~BaseEditorDocumentParser() = default;
 
 QString BaseEditorDocumentParser::filePath() const
 {
diff --git a/src/plugins/cpptools/baseeditordocumentprocessor.cpp b/src/plugins/cpptools/baseeditordocumentprocessor.cpp
index 20632289c6..8c869ee51f 100644
--- a/src/plugins/cpptools/baseeditordocumentprocessor.cpp
+++ b/src/plugins/cpptools/baseeditordocumentprocessor.cpp
@@ -52,9 +52,7 @@ BaseEditorDocumentProcessor::BaseEditorDocumentProcessor(QTextDocument *textDocu
 {
 }
 
-BaseEditorDocumentProcessor::~BaseEditorDocumentProcessor()
-{
-}
+BaseEditorDocumentProcessor::~BaseEditorDocumentProcessor() = default;
 
 void BaseEditorDocumentProcessor::run(bool projectsUpdated)
 {
@@ -92,7 +90,7 @@ void BaseEditorDocumentProcessor::invalidateDiagnostics()
 }
 
 void BaseEditorDocumentProcessor::setParserConfig(
-        const BaseEditorDocumentParser::Configuration config)
+        const BaseEditorDocumentParser::Configuration &config)
 {
     parser()->setConfiguration(config);
 }
diff --git a/src/plugins/cpptools/baseeditordocumentprocessor.h b/src/plugins/cpptools/baseeditordocumentprocessor.h
index 4c61a3c746..3fcf363046 100644
--- a/src/plugins/cpptools/baseeditordocumentprocessor.h
+++ b/src/plugins/cpptools/baseeditordocumentprocessor.h
@@ -86,7 +86,7 @@ public:
 
     virtual void editorDocumentTimerRestarted();
 
-    virtual void setParserConfig(const BaseEditorDocumentParser::Configuration config);
+    virtual void setParserConfig(const BaseEditorDocumentParser::Configuration &config);
 
     virtual QFuture<CursorInfo> cursorInfo(const CursorInfoParams &params) = 0;
     virtual QFuture<CursorInfo> requestLocalReferences(const QTextCursor &cursor) = 0;
@@ -103,12 +103,12 @@ signals:
     void projectPartInfoUpdated(const CppTools::ProjectPartInfo &projectPartInfo);
 
     void codeWarningsUpdated(unsigned revision,
-                             const QList<QTextEdit::ExtraSelection> selections,
+                             const QList<QTextEdit::ExtraSelection> &selections,
                              const HeaderErrorDiagnosticWidgetCreator &creator,
                              const TextEditor::RefactorMarkers &refactorMarkers);
 
     void ifdefedOutBlocksUpdated(unsigned revision,
-                                 const QList<TextEditor::BlockRange> ifdefedOutBlocks);
+                                 const QList<TextEditor::BlockRange> &ifdefedOutBlocks);
 
     void cppDocumentUpdated(const CPlusPlus::Document::Ptr document);    // TODO: Remove me
     void semanticInfoUpdated(const CppTools::SemanticInfo semanticInfo); // TODO: Remove me
diff --git a/src/plugins/cpptools/builtincursorinfo.cpp b/src/plugins/cpptools/builtincursorinfo.cpp
index 85603ba090..ffbe196760 100644
--- a/src/plugins/cpptools/builtincursorinfo.cpp
+++ b/src/plugins/cpptools/builtincursorinfo.cpp
@@ -91,7 +91,7 @@ CursorInfo::Ranges toRanges(const SemanticUses &uses)
     return ranges;
 }
 
-CursorInfo::Ranges toRanges(const QList<int> tokenIndices, TranslationUnit *translationUnit)
+CursorInfo::Ranges toRanges(const QList<int> &tokenIndices, TranslationUnit *translationUnit)
 {
     CursorInfo::Ranges ranges;
     ranges.reserve(tokenIndices.size());
@@ -109,7 +109,7 @@ class FunctionDefinitionUnderCursor: protected ASTVisitor
     DeclarationAST *m_functionDefinition = nullptr;
 
 public:
-    FunctionDefinitionUnderCursor(TranslationUnit *translationUnit)
+    explicit FunctionDefinitionUnderCursor(TranslationUnit *translationUnit)
         : ASTVisitor(translationUnit)
     { }
 
diff --git a/src/plugins/cpptools/builtineditordocumentprocessor.cpp b/src/plugins/cpptools/builtineditordocumentprocessor.cpp
index 42daa67963..9232750684 100644
--- a/src/plugins/cpptools/builtineditordocumentprocessor.cpp
+++ b/src/plugins/cpptools/builtineditordocumentprocessor.cpp
@@ -95,14 +95,14 @@ CppTools::CheckSymbols *createHighlighter(const CPlusPlus::Document::Ptr &doc,
                                           const CPlusPlus::Snapshot &snapshot,
                                           QTextDocument *textDocument)
 {
-    QTC_ASSERT(doc, return 0);
-    QTC_ASSERT(doc->translationUnit(), return 0);
-    QTC_ASSERT(doc->translationUnit()->ast(), return 0);
-    QTC_ASSERT(textDocument, return 0);
+    QTC_ASSERT(doc, return nullptr);
+    QTC_ASSERT(doc->translationUnit(), return nullptr);
+    QTC_ASSERT(doc->translationUnit()->ast(), return nullptr);
+    QTC_ASSERT(textDocument, return nullptr);
 
     using namespace CPlusPlus;
     using namespace CppTools;
-    typedef TextEditor::HighlightingResult Result;
+    using Result = TextEditor::HighlightingResult;
     QList<Result> macroUses;
 
     using Utils::Text::convertPosition;
@@ -168,7 +168,7 @@ BuiltinEditorDocumentProcessor::BuiltinEditorDocumentProcessor(
     , m_codeWarningsUpdated(false)
     , m_semanticHighlighter(enableSemanticHighlighter
                             ? new CppTools::SemanticHighlighter(document)
-                            : 0)
+                            : nullptr)
 {
     using namespace Internal;
 
diff --git a/src/plugins/cpptools/builtinindexingsupport.cpp b/src/plugins/cpptools/builtinindexingsupport.cpp
index 0387d4d9ac..ff21e85500 100644
--- a/src/plugins/cpptools/builtinindexingsupport.cpp
+++ b/src/plugins/cpptools/builtinindexingsupport.cpp
@@ -70,7 +70,6 @@ class WriteTaskFileForDiagnostics
 
 public:
     WriteTaskFileForDiagnostics()
-        : m_processedDiagnostics(0)
     {
         const QString fileName = Utils::TemporaryDirectory::masterDirectoryPath()
                 + "/qtc_findErrorsIndexing.diagnostics."
@@ -120,7 +119,7 @@ public:
 private:
     QFile m_file;
     QTextStream m_out;
-    int m_processedDiagnostics;
+    int m_processedDiagnostics = 0;
 };
 
 void classifyFiles(const QSet<QString> &files, QStringList *headers, QStringList *sources)
@@ -262,16 +261,15 @@ class BuiltinSymbolSearcher: public SymbolSearcher
 {
 public:
     BuiltinSymbolSearcher(const CPlusPlus::Snapshot &snapshot,
-                          Parameters parameters, QSet<QString> fileNames)
+                          const Parameters &parameters, const QSet<QString> &fileNames)
         : m_snapshot(snapshot)
         , m_parameters(parameters)
         , m_fileNames(fileNames)
     {}
 
-    ~BuiltinSymbolSearcher()
-    {}
+    ~BuiltinSymbolSearcher() override = default;
 
-    void runSearch(QFutureInterface<Core::SearchResultItem> &future)
+    void runSearch(QFutureInterface<Core::SearchResultItem> &future) override
     {
         future.setProgressRange(0, m_snapshot.size());
         future.setProgressValue(0);
@@ -343,8 +341,7 @@ BuiltinIndexingSupport::BuiltinIndexingSupport()
     m_synchronizer.setCancelOnWait(true);
 }
 
-BuiltinIndexingSupport::~BuiltinIndexingSupport()
-{}
+BuiltinIndexingSupport::~BuiltinIndexingSupport() = default;
 
 QFuture<void> BuiltinIndexingSupport::refreshSourceFiles(
         const QFutureInterface<void> &superFuture,
@@ -382,7 +379,8 @@ QFuture<void> BuiltinIndexingSupport::refreshSourceFiles(
     return result;
 }
 
-SymbolSearcher *BuiltinIndexingSupport::createSymbolSearcher(SymbolSearcher::Parameters parameters, QSet<QString> fileNames)
+SymbolSearcher *BuiltinIndexingSupport::createSymbolSearcher(
+        const SymbolSearcher::Parameters &parameters, const QSet<QString> &fileNames)
 {
     return new BuiltinSymbolSearcher(CppModelManager::instance()->snapshot(), parameters, fileNames);
 }
diff --git a/src/plugins/cpptools/builtinindexingsupport.h b/src/plugins/cpptools/builtinindexingsupport.h
index ad4f06d52e..26e0a22dd3 100644
--- a/src/plugins/cpptools/builtinindexingsupport.h
+++ b/src/plugins/cpptools/builtinindexingsupport.h
@@ -36,13 +36,13 @@ namespace Internal {
 class BuiltinIndexingSupport: public CppIndexingSupport {
 public:
     BuiltinIndexingSupport();
-    ~BuiltinIndexingSupport();
+    ~BuiltinIndexingSupport() override;
 
     QFuture<void> refreshSourceFiles(const QFutureInterface<void> &superFuture,
                                      const QSet<QString> &sourceFiles,
                                      CppModelManager::ProgressNotificationMode mode) override;
-    SymbolSearcher *createSymbolSearcher(SymbolSearcher::Parameters parameters,
-                                         QSet<QString> fileNames)  override;
+    SymbolSearcher *createSymbolSearcher(const SymbolSearcher::Parameters &parameters,
+                                         const QSet<QString> &fileNames) override;
 
 public:
     static bool isFindErrorsIndexingActive();
diff --git a/src/plugins/cpptools/clangdiagnosticconfigsmodel.h b/src/plugins/cpptools/clangdiagnosticconfigsmodel.h
index 5b0f850f79..d698611cd7 100644
--- a/src/plugins/cpptools/clangdiagnosticconfigsmodel.h
+++ b/src/plugins/cpptools/clangdiagnosticconfigsmodel.h
@@ -37,7 +37,7 @@ class CPPTOOLS_EXPORT ClangDiagnosticConfigsModel
 {
 public:
     ClangDiagnosticConfigsModel() = default;
-    ClangDiagnosticConfigsModel(const ClangDiagnosticConfigs &customConfigs);
+    explicit ClangDiagnosticConfigsModel(const ClangDiagnosticConfigs &customConfigs);
 
     int size() const;
     const ClangDiagnosticConfig &at(int index) const;
diff --git a/src/plugins/cpptools/compileroptionsbuilder.cpp b/src/plugins/cpptools/compileroptionsbuilder.cpp
index 8398bbd687..426a96b534 100644
--- a/src/plugins/cpptools/compileroptionsbuilder.cpp
+++ b/src/plugins/cpptools/compileroptionsbuilder.cpp
@@ -303,13 +303,13 @@ void CompilerOptionsBuilder::addHeaderPathOptions()
     }
 
 
-    for (const HeaderPath &headerPath : filter.userHeaderPaths)
+    for (const HeaderPath &headerPath : qAsConst(filter.userHeaderPaths))
         addIncludeDirOptionForPath(headerPath);
 
-    for (const HeaderPath &headerPath : filter.systemHeaderPaths)
+    for (const HeaderPath &headerPath : qAsConst(filter.systemHeaderPaths))
         addIncludeDirOptionForPath(headerPath);
 
-    for (const HeaderPath &headerPath : filter.builtInHeaderPaths)
+    for (const HeaderPath &headerPath : qAsConst(filter.builtInHeaderPaths))
         addIncludeDirOptionForPath(headerPath);
 }
 
diff --git a/src/plugins/cpptools/cppbuiltinmodelmanagersupport.cpp b/src/plugins/cpptools/cppbuiltinmodelmanagersupport.cpp
index 8aead44395..0fad49c15f 100644
--- a/src/plugins/cpptools/cppbuiltinmodelmanagersupport.cpp
+++ b/src/plugins/cpptools/cppbuiltinmodelmanagersupport.cpp
@@ -61,9 +61,7 @@ BuiltinModelManagerSupport::BuiltinModelManagerSupport()
 {
 }
 
-BuiltinModelManagerSupport::~BuiltinModelManagerSupport()
-{
-}
+BuiltinModelManagerSupport::~BuiltinModelManagerSupport() = default;
 
 BaseEditorDocumentProcessor *BuiltinModelManagerSupport::createEditorDocumentProcessor(
         TextEditor::TextDocument *baseTextDocument)
diff --git a/src/plugins/cpptools/cppbuiltinmodelmanagersupport.h b/src/plugins/cpptools/cppbuiltinmodelmanagersupport.h
index 49b0756690..3e6587ce8a 100644
--- a/src/plugins/cpptools/cppbuiltinmodelmanagersupport.h
+++ b/src/plugins/cpptools/cppbuiltinmodelmanagersupport.h
@@ -38,7 +38,7 @@ class BuiltinModelManagerSupport: public ModelManagerSupport
 
 public:
     BuiltinModelManagerSupport();
-    virtual ~BuiltinModelManagerSupport();
+    ~BuiltinModelManagerSupport() override;
 
     CppCompletionAssistProvider *completionAssistProvider() final;
     TextEditor::BaseHoverHandler *createHoverHandler() final;
diff --git a/src/plugins/cpptools/cppcanonicalsymbol.cpp b/src/plugins/cpptools/cppcanonicalsymbol.cpp
index fa5d074921..50eb9a3544 100644
--- a/src/plugins/cpptools/cppcanonicalsymbol.cpp
+++ b/src/plugins/cpptools/cppcanonicalsymbol.cpp
@@ -55,7 +55,7 @@ const LookupContext &CanonicalSymbol::context() const
 Scope *CanonicalSymbol::getScopeAndExpression(const QTextCursor &cursor, QString *code)
 {
     if (!m_document)
-        return 0;
+        return nullptr;
 
     QTextCursor tc = cursor;
     int line, column;
@@ -65,7 +65,7 @@ Scope *CanonicalSymbol::getScopeAndExpression(const QTextCursor &cursor, QString
     QTextDocument *textDocument = cursor.document();
     if (!CppTools::isValidIdentifierChar(textDocument->characterAt(pos)))
         if (!(pos > 0 && CppTools::isValidIdentifierChar(textDocument->characterAt(pos - 1))))
-            return 0;
+            return nullptr;
 
     while (CppTools::isValidIdentifierChar(textDocument->characterAt(pos)))
         ++pos;
@@ -83,7 +83,7 @@ Symbol *CanonicalSymbol::operator()(const QTextCursor &cursor)
     if (Scope *scope = getScopeAndExpression(cursor, &code))
         return operator()(scope, code);
 
-    return 0;
+    return nullptr;
 }
 
 Symbol *CanonicalSymbol::operator()(Scope *scope, const QString &code)
@@ -118,14 +118,12 @@ Symbol *CanonicalSymbol::canonicalSymbol(Scope *scope, const QString &code,
         }
     }
 
-    for (int i = 0; i < results.size(); ++i) {
-        const LookupItem &r = results.at(i);
-
-        if (r.declaration())
+    for (const auto &r : results) {
+         if (r.declaration())
             return r.declaration();
     }
 
-    return 0;
+    return nullptr;
 }
 
 } // namespace CppEditor
diff --git a/src/plugins/cpptools/cppchecksymbols.cpp b/src/plugins/cpptools/cppchecksymbols.cpp
index ab2adc104f..ea534531e6 100644
--- a/src/plugins/cpptools/cppchecksymbols.cpp
+++ b/src/plugins/cpptools/cppchecksymbols.cpp
@@ -185,7 +185,7 @@ protected:
 
     bool visit(Declaration *symbol) override
     {
-        if (symbol->enclosingEnum() != 0)
+        if (symbol->enclosingEnum() != nullptr)
             addStatic(symbol->name());
 
         if (symbol->type()->isFunctionType())
@@ -303,9 +303,9 @@ CheckSymbols::Future CheckSymbols::go(Document::Ptr doc, const LookupContext &co
 CheckSymbols * CheckSymbols::create(Document::Ptr doc, const LookupContext &context,
                                     const QList<CheckSymbols::Result> &macroUses)
 {
-    QTC_ASSERT(doc, return NULL);
-    QTC_ASSERT(doc->translationUnit(), return NULL);
-    QTC_ASSERT(doc->translationUnit()->ast(), return NULL);
+    QTC_ASSERT(doc, return nullptr);
+    QTC_ASSERT(doc->translationUnit(), return nullptr);
+    QTC_ASSERT(doc->translationUnit()->ast(), return nullptr);
 
     return new CheckSymbols(doc, context, macroUses);
 }
@@ -315,7 +315,7 @@ CheckSymbols::CheckSymbols(Document::Ptr doc, const LookupContext &context, cons
     , _lineOfLastUsage(0), _macroUses(macroUses)
 {
     unsigned line = 0;
-    getTokenEndPosition(translationUnit()->ast()->lastToken(), &line, 0);
+    getTokenEndPosition(translationUnit()->ast()->lastToken(), &line, nullptr);
     _chunkSize = qMax(50U, line / 200);
     _usages.reserve(_chunkSize);
 
@@ -326,8 +326,7 @@ CheckSymbols::CheckSymbols(Document::Ptr doc, const LookupContext &context, cons
     typeOfExpression.setExpandTemplates(true);
 }
 
-CheckSymbols::~CheckSymbols()
-{ }
+CheckSymbols::~CheckSymbols() = default;
 
 void CheckSymbols::run()
 {
@@ -385,7 +384,7 @@ FunctionDefinitionAST *CheckSymbols::enclosingFunctionDefinition(bool skipTopOfS
             return funDef;
     }
 
-    return 0;
+    return nullptr;
 }
 
 TemplateDeclarationAST *CheckSymbols::enclosingTemplateDeclaration() const
@@ -397,7 +396,7 @@ TemplateDeclarationAST *CheckSymbols::enclosingTemplateDeclaration() const
             return funDef;
     }
 
-    return 0;
+    return nullptr;
 }
 
 Scope *CheckSymbols::enclosingScope() const
@@ -508,7 +507,7 @@ bool CheckSymbols::visit(DotDesignatorAST *ast)
 
 bool CheckSymbols::visit(SimpleDeclarationAST *ast)
 {
-    NameAST *declrIdNameAST = 0;
+    NameAST *declrIdNameAST = nullptr;
     if (ast->declarator_list && !ast->declarator_list->next) {
         if (ast->symbols && !ast->symbols->next && !ast->symbols->value->isGenerated()) {
             Symbol *decl = ast->symbols->value;
@@ -606,7 +605,7 @@ bool CheckSymbols::visit(ObjCClassForwardDeclarationAST *ast)
 {
     accept(ast->attribute_list);
     accept(ast->identifier_list);
-    for (NameListAST *i = ast->identifier_list ; i != 0; i = i->next)
+    for (NameListAST *i = ast->identifier_list; i; i = i->next)
         addUse(i->value, SemanticHighlighter::TypeUse);
     return false;
 }
@@ -680,7 +679,7 @@ bool CheckSymbols::visit(CallAST *ast)
         } else if (IdExpressionAST *idExpr = ast->base_expression->asIdExpression()) {
             if (const Name *name = idExpr->name->name) {
                 if (maybeFunction(name)) {
-                    expr = 0;
+                    expr = nullptr;
 
                     NameAST *exprName = idExpr->name;
                     if (QualifiedNameAST *q = exprName->asQualifiedName()) {
@@ -723,8 +722,8 @@ bool CheckSymbols::visit(NewExpressionAST *ast)
     if (highlightCtorDtorAsType) {
         accept(ast->new_type_id);
     } else {
-        ClassOrNamespace *binding = 0;
-        NameAST *nameAST = 0;
+        ClassOrNamespace *binding = nullptr;
+        NameAST *nameAST = nullptr;
         if (ast->new_type_id) {
             for (SpecifierListAST *it = ast->new_type_id->type_specifier_list; it; it = it->next) {
                 if (NamedTypeSpecifierAST *spec = it->value->asNamedTypeSpecifier()) {
@@ -746,7 +745,7 @@ bool CheckSymbols::visit(NewExpressionAST *ast)
         if (binding && nameAST) {
             int arguments = 0;
             if (ast->new_initializer) {
-                ExpressionListAST *list = 0;
+                ExpressionListAST *list = nullptr;
                 if (ExpressionListParenAST *exprListParen = ast->new_initializer->asExpressionListParen())
                     list = exprListParen->expression_list;
                 else if (BracedInitializerAST *braceInit = ast->new_initializer->asBracedInitializer())
@@ -853,7 +852,7 @@ void CheckSymbols::checkName(NameAST *ast, Scope *scope)
         if (!scope)
             scope = enclosingScope();
 
-        if (ast->asDestructorName() != 0) {
+        if (ast->asDestructorName() != nullptr) {
             Class *klass = scope->asClass();
             if (!klass && scope->asFunction())
                 klass = scope->asFunction()->enclosingScope()->asClass();
@@ -915,7 +914,7 @@ bool CheckSymbols::visit(QualifiedNameAST *ast)
         ClassOrNamespace *binding = checkNestedName(ast);
 
         if (binding && ast->unqualified_name) {
-            if (ast->unqualified_name->asDestructorName() != 0) {
+            if (ast->unqualified_name->asDestructorName() != nullptr) {
                 if (hasVirtualDestructor(binding)) {
                     addUse(ast->unqualified_name, SemanticHighlighter::VirtualFunctionDeclarationUse);
                 } else {
@@ -943,7 +942,7 @@ bool CheckSymbols::visit(QualifiedNameAST *ast)
 
 ClassOrNamespace *CheckSymbols::checkNestedName(QualifiedNameAST *ast)
 {
-    ClassOrNamespace *binding = 0;
+    ClassOrNamespace *binding = nullptr;
 
     if (ast->name) {
         if (NestedNameSpecifierListAST *it = ast->nested_name_specifier_list) {
@@ -969,7 +968,7 @@ ClassOrNamespace *CheckSymbols::checkNestedName(QualifiedNameAST *ast)
                         if (TemplateIdAST *template_id = class_or_namespace_name->asTemplateId()) {
                             if (template_id->template_token) {
                                 addUse(template_id, SemanticHighlighter::TypeUse);
-                                binding = 0; // there's no way we can find a binding.
+                                binding = nullptr; // there's no way we can find a binding.
                             }
 
                             accept(template_id->template_argument_list);
@@ -1026,7 +1025,7 @@ bool CheckSymbols::visit(MemInitializerAST *ast)
                             // It's a constructor, count the number of arguments
                             unsigned arguments = 0;
                             if (ast->expression) {
-                                ExpressionListAST *expr_list = 0;
+                                ExpressionListAST *expr_list = nullptr;
                                 if (ExpressionListParenAST *parenExprList = ast->expression->asExpressionListParen())
                                     expr_list = parenExprList->expression_list;
                                 else if (BracedInitializerAST *bracedInitList = ast->expression->asBracedInitializer())
@@ -1165,7 +1164,7 @@ void CheckSymbols::addUse(NameAST *ast, Kind kind)
 
     if (!ast)
         return; // nothing to do
-    else if (ast->asOperatorFunctionId() != 0 || ast->asConversionFunctionId() != 0)
+    else if (ast->asOperatorFunctionId() != nullptr || ast->asConversionFunctionId() != nullptr)
         return; // nothing to do
 
     unsigned startToken = ast->firstToken();
@@ -1262,14 +1261,14 @@ bool CheckSymbols::maybeAddTypeOrStatic(const QList<LookupItem> &candidates, Nam
         else if (c->isTypedef() || c->isNamespace() ||
                  c->isStatic() || //consider also static variable
                  c->isClass() || c->isEnum() || isTemplateClass(c) ||
-                 c->isForwardClassDeclaration() || c->isTypenameArgument() || c->enclosingEnum() != 0) {
+                 c->isForwardClassDeclaration() || c->isTypenameArgument() || c->enclosingEnum() != nullptr) {
 
             unsigned line, column;
             getTokenStartPosition(startToken, &line, &column);
             const unsigned length = tok.utf16chars();
 
             Kind kind = SemanticHighlighter::TypeUse;
-            if (c->enclosingEnum() != 0)
+            if (c->enclosingEnum() != nullptr)
                 kind = SemanticHighlighter::EnumerationUse;
             else if (c->isStatic())
                 // treat static variable as a field(highlighting)
@@ -1428,7 +1427,7 @@ NameAST *CheckSymbols::declaratorId(DeclaratorAST *ast) const
             return declId->name;
     }
 
-    return 0;
+    return nullptr;
 }
 
 bool CheckSymbols::maybeType(const Name *name) const
diff --git a/src/plugins/cpptools/cppchecksymbols.h b/src/plugins/cpptools/cppchecksymbols.h
index a32886cef5..9a686c2995 100644
--- a/src/plugins/cpptools/cppchecksymbols.h
+++ b/src/plugins/cpptools/cppchecksymbols.h
@@ -47,12 +47,12 @@ class CPPTOOLS_EXPORT CheckSymbols:
 public:
     ~CheckSymbols() override;
 
-    typedef TextEditor::HighlightingResult Result;
-    typedef SemanticHighlighter::Kind Kind;
+    using Result = TextEditor::HighlightingResult;
+    using Kind = SemanticHighlighter::Kind;
 
     void run() override;
 
-    typedef QFuture<Result> Future;
+    using Future = QFuture<Result>;
 
     Future start()
     {
@@ -88,7 +88,7 @@ public:
 
 signals:
     void codeWarningsUpdated(CPlusPlus::Document::Ptr document,
-                             const QList<CPlusPlus::Document::DiagnosticMessage> selections);
+                             const QList<CPlusPlus::Document::DiagnosticMessage> &selections);
 
 protected:
     using ASTVisitor::visit;
diff --git a/src/plugins/cpptools/cppclassesfilter.cpp b/src/plugins/cpptools/cppclassesfilter.cpp
index f4f29a3522..1306a155a4 100644
--- a/src/plugins/cpptools/cppclassesfilter.cpp
+++ b/src/plugins/cpptools/cppclassesfilter.cpp
@@ -39,9 +39,7 @@ CppClassesFilter::CppClassesFilter(CppLocatorData *locatorData)
     setIncludedByDefault(false);
 }
 
-CppClassesFilter::~CppClassesFilter()
-{
-}
+CppClassesFilter::~CppClassesFilter() = default;
 
 Core::LocatorFilterEntry CppClassesFilter::filterEntryFromIndexItem(IndexItem::Ptr info)
 {
diff --git a/src/plugins/cpptools/cppclassesfilter.h b/src/plugins/cpptools/cppclassesfilter.h
index 0c77493e5a..1b68ac7e4b 100644
--- a/src/plugins/cpptools/cppclassesfilter.h
+++ b/src/plugins/cpptools/cppclassesfilter.h
@@ -38,7 +38,7 @@ class CPPTOOLS_EXPORT CppClassesFilter : public Internal::CppLocatorFilter
     Q_OBJECT
 
 public:
-    CppClassesFilter(CppLocatorData *locatorData);
+    explicit CppClassesFilter(CppLocatorData *locatorData);
     ~CppClassesFilter() override;
 
 protected:
diff --git a/src/plugins/cpptools/cppcodeformatter.cpp b/src/plugins/cpptools/cppcodeformatter.cpp
index 99e28529c1..03a7da9180 100644
--- a/src/plugins/cpptools/cppcodeformatter.cpp
+++ b/src/plugins/cpptools/cppcodeformatter.cpp
@@ -40,9 +40,7 @@ using namespace CppTools;
 using namespace TextEditor;
 using namespace CppTools::Internal;
 
-CodeFormatter::~CodeFormatter()
-{
-}
+CodeFormatter::~CodeFormatter() = default;
 
 void CodeFormatter::setTabSize(int tabSize)
 {
@@ -1098,9 +1096,7 @@ namespace Internal {
 }
 }
 
-QtStyleCodeFormatter::QtStyleCodeFormatter()
-{
-}
+QtStyleCodeFormatter::QtStyleCodeFormatter() = default;
 
 QtStyleCodeFormatter::QtStyleCodeFormatter(const TabSettings &tabSettings,
                                            const CppCodeStyleSettings &settings)
@@ -1124,7 +1120,7 @@ void QtStyleCodeFormatter::setCodeStyleSettings(const CppCodeStyleSettings &sett
 void QtStyleCodeFormatter::saveBlockData(QTextBlock *block, const BlockData &data) const
 {
     TextBlockUserData *userData = TextDocumentLayout::userData(*block);
-    CppCodeFormatterData *cppData = static_cast<CppCodeFormatterData *>(userData->codeFormatterData());
+    auto cppData = static_cast<CppCodeFormatterData *>(userData->codeFormatterData());
     if (!cppData) {
         cppData = new CppCodeFormatterData;
         userData->setCodeFormatterData(cppData);
@@ -1137,7 +1133,7 @@ bool QtStyleCodeFormatter::loadBlockData(const QTextBlock &block, BlockData *dat
     TextBlockUserData *userData = TextDocumentLayout::testUserData(block);
     if (!userData)
         return false;
-    CppCodeFormatterData *cppData = static_cast<CppCodeFormatterData *>(userData->codeFormatterData());
+    auto cppData = static_cast<const CppCodeFormatterData *>(userData->codeFormatterData());
     if (!cppData)
         return false;
 
diff --git a/src/plugins/cpptools/cppcodeformatter.h b/src/plugins/cpptools/cppcodeformatter.h
index 02fb12833f..b55724dc65 100644
--- a/src/plugins/cpptools/cppcodeformatter.h
+++ b/src/plugins/cpptools/cppcodeformatter.h
@@ -175,7 +175,7 @@ public: // must be public to make Q_GADGET introspection work
         string_open
 
     };
-    Q_ENUMS(StateType)
+    Q_ENUM(StateType)
 
 protected:
     class State {
diff --git a/src/plugins/cpptools/cppcodegen_test.cpp b/src/plugins/cpptools/cppcodegen_test.cpp
index 5ec22942a5..01d8973904 100644
--- a/src/plugins/cpptools/cppcodegen_test.cpp
+++ b/src/plugins/cpptools/cppcodegen_test.cpp
@@ -44,7 +44,7 @@ using namespace CppTools::Internal;
 
 namespace {
 
-Document::Ptr createDocument(const QString filePath, const QByteArray text,
+Document::Ptr createDocument(const QString &filePath, const QByteArray &text,
                              unsigned expectedGlobalSymbolCount)
 {
     Document::Ptr document = Document::create(filePath);
diff --git a/src/plugins/cpptools/cppcodemodelinspectordumper.cpp b/src/plugins/cpptools/cppcodemodelinspectordumper.cpp
index 89d447208f..b06d26315e 100644
--- a/src/plugins/cpptools/cppcodemodelinspectordumper.cpp
+++ b/src/plugins/cpptools/cppcodemodelinspectordumper.cpp
@@ -665,8 +665,8 @@ void Dumper::dumpDocuments(const QList<CPlusPlus::Document::Ptr> &documents, boo
         if (!diagnosticMessages.isEmpty()) {
             m_out << i3 << "Diagnostic Messages:{{{4\n";
             foreach (const CPlusPlus::Document::DiagnosticMessage &msg, diagnosticMessages) {
-                const CPlusPlus::Document::DiagnosticMessage::Level level
-                        = static_cast<CPlusPlus::Document::DiagnosticMessage::Level>(msg.level());
+                auto level =
+                    static_cast<const CPlusPlus::Document::DiagnosticMessage::Level>(msg.level());
                 m_out << i4 << "at " << msg.line() << ":" << msg.column() << ", " << Utils::toString(level)
                       << ": " << msg.text() << "\n";
             }
diff --git a/src/plugins/cpptools/cppcodemodelsettingspage.h b/src/plugins/cpptools/cppcodemodelsettingspage.h
index 54547bc026..5ccb5fb37f 100644
--- a/src/plugins/cpptools/cppcodemodelsettingspage.h
+++ b/src/plugins/cpptools/cppcodemodelsettingspage.h
@@ -46,7 +46,7 @@ class CppCodeModelSettingsWidget: public QWidget
     Q_OBJECT
 
 public:
-    explicit CppCodeModelSettingsWidget(QWidget *parent = 0);
+    explicit CppCodeModelSettingsWidget(QWidget *parent = nullptr);
     ~CppCodeModelSettingsWidget() override;
 
     void setSettings(const QSharedPointer<CppCodeModelSettings> &s);
@@ -68,11 +68,11 @@ class CppCodeModelSettingsPage: public Core::IOptionsPage
 {
 public:
     explicit CppCodeModelSettingsPage(QSharedPointer<CppCodeModelSettings> &settings,
-                                      QObject *parent = 0);
+                                      QObject *parent = nullptr);
 
-    QWidget *widget();
-    void apply();
-    void finish();
+    QWidget *widget() override;
+    void apply() override;
+    void finish() override;
 
 private:
     const QSharedPointer<CppCodeModelSettings> m_settings;
diff --git a/src/plugins/cpptools/cppcodestylepreferencesfactory.cpp b/src/plugins/cpptools/cppcodestylepreferencesfactory.cpp
index 6eb401f3ec..00da046edc 100644
--- a/src/plugins/cpptools/cppcodestylepreferencesfactory.cpp
+++ b/src/plugins/cpptools/cppcodestylepreferencesfactory.cpp
@@ -82,9 +82,7 @@ static const char *defaultPreviewText =
     ;
 
 
-CppCodeStylePreferencesFactory::CppCodeStylePreferencesFactory()
-{
-}
+CppCodeStylePreferencesFactory::CppCodeStylePreferencesFactory() = default;
 
 Core::Id CppCodeStylePreferencesFactory::languageId()
 {
@@ -104,10 +102,10 @@ TextEditor::ICodeStylePreferences *CppCodeStylePreferencesFactory::createCodeSty
 QWidget *CppCodeStylePreferencesFactory::createEditor(TextEditor::ICodeStylePreferences *preferences,
                                                            QWidget *parent) const
 {
-    CppCodeStylePreferences *cppPreferences = qobject_cast<CppCodeStylePreferences *>(preferences);
+    auto cppPreferences = qobject_cast<CppCodeStylePreferences *>(preferences);
     if (!cppPreferences)
-        return 0;
-    Internal::CppCodeStylePreferencesWidget *widget = new Internal::CppCodeStylePreferencesWidget(parent);
+        return nullptr;
+    auto widget = new Internal::CppCodeStylePreferencesWidget(parent);
     widget->layout()->setMargin(0);
     widget->setCodeStyle(cppPreferences);
     return widget;
diff --git a/src/plugins/cpptools/cppcodestylepreferencesfactory.h b/src/plugins/cpptools/cppcodestylepreferencesfactory.h
index 13d602a08d..233022a31a 100644
--- a/src/plugins/cpptools/cppcodestylepreferencesfactory.h
+++ b/src/plugins/cpptools/cppcodestylepreferencesfactory.h
@@ -36,14 +36,14 @@ class CPPTOOLS_EXPORT CppCodeStylePreferencesFactory : public TextEditor::ICodeS
 public:
     CppCodeStylePreferencesFactory();
 
-    Core::Id languageId();
-    QString displayName();
-    TextEditor::ICodeStylePreferences *createCodeStyle() const;
+    Core::Id languageId() override;
+    QString displayName() override;
+    TextEditor::ICodeStylePreferences *createCodeStyle() const override;
     QWidget *createEditor(TextEditor::ICodeStylePreferences *settings,
-                          QWidget *parent) const;
-    TextEditor::Indenter *createIndenter() const;
-    QString snippetProviderGroupId() const;
-    QString previewText() const;
+                          QWidget *parent) const override;
+    TextEditor::Indenter *createIndenter() const override;
+    QString snippetProviderGroupId() const override;
+    QString previewText() const override;
 };
 
 } // namespace CppTools
diff --git a/src/plugins/cpptools/cppcodestylesettings.cpp b/src/plugins/cpptools/cppcodestylesettings.cpp
index 565c969689..745ea3ab62 100644
--- a/src/plugins/cpptools/cppcodestylesettings.cpp
+++ b/src/plugins/cpptools/cppcodestylesettings.cpp
@@ -214,8 +214,8 @@ Utils::optional<CppCodeStyleSettings> CppCodeStyleSettings::currentProjectCodeSt
         = editorConfiguration->codeStyle(Constants::CPP_SETTINGS_ID);
     QTC_ASSERT(codeStylePreferences, return OptSettings());
 
-    CppCodeStylePreferences *cppCodeStylePreferences
-        = dynamic_cast<CppCodeStylePreferences *>(codeStylePreferences);
+    auto cppCodeStylePreferences =
+            dynamic_cast<const CppCodeStylePreferences *>(codeStylePreferences);
     if (!cppCodeStylePreferences)
         return OptSettings();
 
@@ -258,7 +258,7 @@ TextEditor::TabSettings CppCodeStyleSettings::currentGlobalTabSettings()
 static void configureOverviewWithCodeStyleSettings(CPlusPlus::Overview &overview,
                                                    const CppCodeStyleSettings &settings)
 {
-    overview.starBindFlags = CPlusPlus::Overview::StarBindFlags(0);
+    overview.starBindFlags = CPlusPlus::Overview::StarBindFlags(nullptr);
     if (settings.bindStarToIdentifier)
         overview.starBindFlags |= CPlusPlus::Overview::BindToIdentifier;
     if (settings.bindStarToTypeName)
diff --git a/src/plugins/cpptools/cppcodestylesettingspage.cpp b/src/plugins/cpptools/cppcodestylesettingspage.cpp
index 26a0edaa6f..c80537db9b 100644
--- a/src/plugins/cpptools/cppcodestylesettingspage.cpp
+++ b/src/plugins/cpptools/cppcodestylesettingspage.cpp
@@ -224,7 +224,7 @@ static void applyRefactorings(QTextDocument *textDocument, TextEditorWidget *edi
 {
     // Preprocess source
     Environment env;
-    Preprocessor preprocess(0, &env);
+    Preprocessor preprocess(nullptr, &env);
     const QByteArray preprocessedSource
         = preprocess.run(QLatin1String("<no-file>"), textDocument->toPlainText());
 
@@ -238,7 +238,7 @@ static void applyRefactorings(QTextDocument *textDocument, TextEditorWidget *edi
     // Run the formatter
     Overview overview;
     overview.showReturnTypes = true;
-    overview.starBindFlags = Overview::StarBindFlags(0);
+    overview.starBindFlags = Overview::StarBindFlags(nullptr);
 
     if (settings.bindStarToIdentifier)
         overview.starBindFlags |= Overview::BindToIdentifier;
@@ -261,9 +261,7 @@ static void applyRefactorings(QTextDocument *textDocument, TextEditorWidget *edi
 
 CppCodeStylePreferencesWidget::CppCodeStylePreferencesWidget(QWidget *parent)
     : QWidget(parent),
-      m_preferences(0),
-      m_ui(new Ui::CppCodeStyleSettingsPage),
-      m_blockUpdates(false)
+      m_ui(new Ui::CppCodeStyleSettingsPage)
 {
     m_ui->setupUi(this);
     m_ui->categoryTab->setProperty("_q_custom_style_disabled", true);
@@ -442,7 +440,7 @@ void CppCodeStylePreferencesWidget::slotCodeStyleSettingsChanged()
         return;
 
     if (m_preferences) {
-        CppCodeStylePreferences *current = qobject_cast<CppCodeStylePreferences *>(m_preferences->currentPreferences());
+        auto current = qobject_cast<CppCodeStylePreferences *>(m_preferences->currentPreferences());
         if (current)
             current->setCodeStyleSettings(cppCodeStyleSettings());
     }
@@ -456,7 +454,7 @@ void CppCodeStylePreferencesWidget::slotTabSettingsChanged(const TabSettings &se
         return;
 
     if (m_preferences) {
-        CppCodeStylePreferences *current = qobject_cast<CppCodeStylePreferences *>(m_preferences->currentPreferences());
+        auto current = qobject_cast<CppCodeStylePreferences *>(m_preferences->currentPreferences());
         if (current)
             current->setTabSettings(settings);
     }
@@ -512,9 +510,8 @@ void CppCodeStylePreferencesWidget::setVisualizeWhitespace(bool on)
 
 // ------------------ CppCodeStyleSettingsPage
 
-CppCodeStyleSettingsPage::CppCodeStyleSettingsPage(QWidget *parent) :
-    Core::IOptionsPage(parent),
-    m_pageCppCodeStylePreferences(0)
+CppCodeStyleSettingsPage::CppCodeStyleSettingsPage(QWidget *parent)
+    : Core::IOptionsPage(parent)
 {
     setId(Constants::CPP_CODE_STYLE_SETTINGS_ID);
     setDisplayName(QCoreApplication::translate("CppTools", Constants::CPP_CODE_STYLE_SETTINGS_NAME));
diff --git a/src/plugins/cpptools/cppcodestylesettingspage.h b/src/plugins/cpptools/cppcodestylesettingspage.h
index 9f29d783ba..b8f82fc302 100644
--- a/src/plugins/cpptools/cppcodestylesettingspage.h
+++ b/src/plugins/cpptools/cppcodestylesettingspage.h
@@ -54,8 +54,8 @@ class CppCodeStylePreferencesWidget : public QWidget
 {
     Q_OBJECT
 public:
-    explicit CppCodeStylePreferencesWidget(QWidget *parent = 0);
-    virtual ~CppCodeStylePreferencesWidget();
+    explicit CppCodeStylePreferencesWidget(QWidget *parent = nullptr);
+    ~CppCodeStylePreferencesWidget() override;
 
     void setCodeStyle(CppTools::CppCodeStylePreferences *codeStylePreferences);
 
@@ -71,10 +71,10 @@ private:
 
     CppCodeStyleSettings cppCodeStyleSettings() const;
 
-    CppCodeStylePreferences *m_preferences;
+    CppCodeStylePreferences *m_preferences = nullptr;
     Ui::CppCodeStyleSettingsPage *m_ui;
     QList<TextEditor::SnippetEditorWidget *> m_previews;
-    bool m_blockUpdates;
+    bool m_blockUpdates = false;
 };
 
 
@@ -83,14 +83,14 @@ class CppCodeStyleSettingsPage : public Core::IOptionsPage
     Q_OBJECT
 
 public:
-    explicit CppCodeStyleSettingsPage(QWidget *parent = 0);
+    explicit CppCodeStyleSettingsPage(QWidget *parent = nullptr);
 
-    QWidget *widget();
-    void apply();
-    void finish();
+    QWidget *widget() override;
+    void apply() override;
+    void finish() override;
 
 private:
-    CppCodeStylePreferences *m_pageCppCodeStylePreferences;
+    CppCodeStylePreferences *m_pageCppCodeStylePreferences = nullptr;
     QPointer<QWidget> m_widget;
 };
 
diff --git a/src/plugins/cpptools/cppcompletion_test.cpp b/src/plugins/cpptools/cppcompletion_test.cpp
index 41a2865011..b8dd817835 100644
--- a/src/plugins/cpptools/cppcompletion_test.cpp
+++ b/src/plugins/cpptools/cppcompletion_test.cpp
@@ -54,14 +54,13 @@ using namespace Core;
 
 namespace {
 
-typedef QByteArray _;
+using _ = QByteArray;
 
 class CompletionTestCase : public Tests::TestCase
 {
 public:
     CompletionTestCase(const QByteArray &sourceText, const QByteArray &textToInsert = QByteArray(),
                        bool isObjC = false)
-        : m_position(-1), m_editorWidget(0), m_textDocument(0), m_editor(0)
     {
         QVERIFY(succeededSoFar());
         m_succeededSoFar = false;
@@ -100,7 +99,7 @@ public:
         m_succeededSoFar = true;
     }
 
-    QStringList getCompletions(bool *replaceAccessOperator = 0) const
+    QStringList getCompletions(bool *replaceAccessOperator = nullptr) const
     {
         QStringList completions;
         LanguageFeatures languageFeatures = LanguageFeatures::defaultFeatures();
@@ -153,12 +152,12 @@ public:
 
 private:
     QByteArray m_source;
-    int m_position;
+    int m_position = -1;
     Snapshot m_snapshot;
     QScopedPointer<Tests::TemporaryDir> m_temporaryDir;
-    TextEditorWidget *m_editorWidget;
-    QTextDocument *m_textDocument;
-    IEditor *m_editor;
+    TextEditorWidget *m_editorWidget = nullptr;
+    QTextDocument *m_textDocument = nullptr;
+    IEditor *m_editor = nullptr;
 };
 
 bool isProbablyGlobalCompletion(const QStringList &list)
diff --git a/src/plugins/cpptools/cppcompletionassist.cpp b/src/plugins/cpptools/cppcompletionassist.cpp
index 87bc2df0b4..ab125a86c7 100644
--- a/src/plugins/cpptools/cppcompletionassist.cpp
+++ b/src/plugins/cpptools/cppcompletionassist.cpp
@@ -70,7 +70,7 @@ namespace Internal {
 
 struct CompleteFunctionDeclaration
 {
-    explicit CompleteFunctionDeclaration(Function *f = 0)
+    explicit CompleteFunctionDeclaration(Function *f = nullptr)
         : function(f)
     {}
 
@@ -83,7 +83,7 @@ struct CompleteFunctionDeclaration
 class CppAssistProposalItem final : public AssistProposalItem
 {
 public:
-    ~CppAssistProposalItem() noexcept {}
+    ~CppAssistProposalItem() noexcept override = default;
     bool prematurelyApplies(const QChar &c) const override;
     void applyContextualContent(TextDocumentManipulatorInterface &manipulator, int basePosition) const override;
 
@@ -120,7 +120,7 @@ AssistProposalItemInterface *CppAssistProposalModel::proposalItem(int index) con
 {
     AssistProposalItemInterface *item = GenericProposalModel::proposalItem(index);
     if (!item->isSnippet()) {
-        CppAssistProposalItem *cppItem = static_cast<CppAssistProposalItem *>(item);
+        auto cppItem = static_cast<CppAssistProposalItem *>(item);
         cppItem->keepCompletionOperator(m_completionOperator);
         cppItem->keepTypeOfExpression(m_typeOfExpression);
     }
@@ -191,7 +191,7 @@ quint64 CppAssistProposalItem::hash() const
 
 void CppAssistProposalItem::applyContextualContent(TextDocumentManipulatorInterface &manipulator, int basePosition) const
 {
-    Symbol *symbol = 0;
+    Symbol *symbol = nullptr;
 
     if (data().isValid())
         symbol = data().value<Symbol *>();
@@ -347,7 +347,7 @@ void CppAssistProposalItem::applyContextualContent(TextDocumentManipulatorInterf
 class CppFunctionHintModel : public IFunctionHintProposalModel
 {
 public:
-    CppFunctionHintModel(QList<Function *> functionSymbols,
+    CppFunctionHintModel(const QList<Function *> &functionSymbols,
                          const QSharedPointer<TypeOfExpression> &typeOfExp)
         : m_functionSymbols(functionSymbols)
         , m_currentArg(-1)
@@ -426,7 +426,7 @@ AssistInterface *InternalCompletionAssistProvider::createAssistInterface(const Q
         int position,
         AssistReason reason) const
 {
-    QTC_ASSERT(textEditorWidget, return 0);
+    QTC_ASSERT(textEditorWidget, return nullptr);
 
     return new CppCompletionAssistInterface(filePath,
                                             textEditorWidget,
@@ -469,18 +469,16 @@ namespace {
 class ConvertToCompletionItem: protected NameVisitor
 {
     // The completion item.
-    AssistProposalItem *_item;
+    AssistProposalItem *_item = nullptr;
 
     // The current symbol.
-    Symbol *_symbol;
+    Symbol *_symbol = nullptr;
 
     // The pretty printer.
     Overview overview;
 
 public:
     ConvertToCompletionItem()
-        : _item(0)
-        , _symbol(0)
     {
         overview.showReturnTypes = true;
         overview.showArgumentNames = true;
@@ -491,9 +489,9 @@ public:
         //using declaration can be qualified
         if (!symbol || !symbol->name() || (symbol->name()->isQualifiedNameId()
                                            && !symbol->asUsingDeclaration()))
-            return 0;
+            return nullptr;
 
-        AssistProposalItem *previousItem = switchCompletionItem(0);
+        AssistProposalItem *previousItem = switchCompletionItem(nullptr);
         Symbol *previousSymbol = switchSymbol(symbol);
         accept(symbol->unqualifiedName());
         if (_item)
@@ -524,32 +522,32 @@ protected:
         return item;
     }
 
-    void visit(const Identifier *name)
+    void visit(const Identifier *name) override
     {
         _item = newCompletionItem(name);
         if (!_symbol->isScope() || _symbol->isFunction())
             _item->setDetail(overview.prettyType(_symbol->type(), name));
     }
 
-    void visit(const TemplateNameId *name)
+    void visit(const TemplateNameId *name) override
     {
         _item = newCompletionItem(name);
         _item->setText(QString::fromUtf8(name->identifier()->chars(), name->identifier()->size()));
     }
 
-    void visit(const DestructorNameId *name)
+    void visit(const DestructorNameId *name) override
     { _item = newCompletionItem(name); }
 
-    void visit(const OperatorNameId *name)
+    void visit(const OperatorNameId *name) override
     {
         _item = newCompletionItem(name);
         _item->setDetail(overview.prettyType(_symbol->type(), name));
     }
 
-    void visit(const ConversionNameId *name)
+    void visit(const ConversionNameId *name) override
     { _item = newCompletionItem(name); }
 
-    void visit(const QualifiedNameId *name)
+    void visit(const QualifiedNameId *name) override
     { _item = newCompletionItem(name->name()); }
 };
 
@@ -561,7 +559,7 @@ Class *asClassOrTemplateClassType(FullySpecifiedType ty)
         if (Symbol *decl = templ->declaration())
             return decl->asClass();
     }
-    return 0;
+    return nullptr;
 }
 
 Scope *enclosingNonTemplateScope(Symbol *symbol)
@@ -573,7 +571,7 @@ Scope *enclosingNonTemplateScope(Symbol *symbol)
             return scope;
         }
     }
-    return 0;
+    return nullptr;
 }
 
 Function *asFunctionOrTemplateFunctionType(FullySpecifiedType ty)
@@ -584,7 +582,7 @@ Function *asFunctionOrTemplateFunctionType(FullySpecifiedType ty)
         if (Symbol *decl = templ->declaration())
             return decl->asFunction();
     }
-    return 0;
+    return nullptr;
 }
 
 bool isQPrivateSignal(const Symbol *symbol)
@@ -758,7 +756,7 @@ bool canCompleteClassNameAt2ndOr4thConnectArgument(
 ClassOrNamespace *classOrNamespaceFromLookupItem(const LookupItem &lookupItem,
                                                  const LookupContext &context)
 {
-    const Name *name = 0;
+    const Name *name = nullptr;
 
     if (Symbol *d = lookupItem.declaration()) {
         if (Class *k = d->asClass())
@@ -771,29 +769,29 @@ ClassOrNamespace *classOrNamespaceFromLookupItem(const LookupItem &lookupItem,
         if (PointerType *pointerType = type->asPointerType())
             type = pointerType->elementType().simplified();
         else
-            return 0; // not a pointer or a reference to a pointer.
+            return nullptr; // not a pointer or a reference to a pointer.
 
         NamedType *namedType = type->asNamedType();
         if (!namedType) // not a class name.
-            return 0;
+            return nullptr;
 
         name = namedType->name();
     }
 
-    return name ? context.lookupType(name, lookupItem.scope()) : 0;
+    return name ? context.lookupType(name, lookupItem.scope()) : nullptr;
 }
 
 Class *classFromLookupItem(const LookupItem &lookupItem, const LookupContext &context)
 {
     ClassOrNamespace *b = classOrNamespaceFromLookupItem(lookupItem, context);
     if (!b)
-        return 0;
+        return nullptr;
 
     foreach (Symbol *s, b->symbols()) {
         if (Class *klass = s->asClass())
             return klass;
     }
-    return 0;
+    return nullptr;
 }
 
 const Name *minimalName(Symbol *symbol, Scope *targetScope, const LookupContext &context)
@@ -814,15 +812,14 @@ InternalCppCompletionAssistProcessor::InternalCppCompletionAssistProcessor()
 {
 }
 
-InternalCppCompletionAssistProcessor::~InternalCppCompletionAssistProcessor()
-{}
+InternalCppCompletionAssistProcessor::~InternalCppCompletionAssistProcessor() = default;
 
 IAssistProposal * InternalCppCompletionAssistProcessor::perform(const AssistInterface *interface)
 {
     m_interface.reset(static_cast<const CppCompletionAssistInterface *>(interface));
 
     if (interface->reason() != ExplicitlyInvoked && !accepts())
-        return 0;
+        return nullptr;
 
     int index = startCompletionHelper();
     if (index != -1) {
@@ -832,7 +829,7 @@ IAssistProposal * InternalCppCompletionAssistProcessor::perform(const AssistInte
         return createContentProposal();
     }
 
-    return 0;
+    return nullptr;
 }
 
 bool InternalCppCompletionAssistProcessor::accepts() const
@@ -901,13 +898,13 @@ IAssistProposal *InternalCppCompletionAssistProcessor::createContentProposal()
     QSet<QString> processed;
     auto it = m_completions.begin();
     while (it != m_completions.end()) {
-        CppAssistProposalItem *item = static_cast<CppAssistProposalItem *>(*it);
+        auto item = static_cast<CppAssistProposalItem *>(*it);
         if (!processed.contains(item->text()) || item->isSnippet()) {
             ++it;
             if (!item->isSnippet()) {
                 processed.insert(item->text());
                 if (!item->isOverloaded()) {
-                    if (Symbol *symbol = qvariant_cast<Symbol *>(item->data())) {
+                    if (auto symbol = qvariant_cast<Symbol *>(item->data())) {
                         if (Function *funTy = symbol->type()->asFunctionType()) {
                             if (funTy->hasArguments())
                                 item->markAsOverloaded();
@@ -1333,7 +1330,7 @@ int InternalCppCompletionAssistProcessor::startCompletionInternal(const QString
     m_model->m_typeOfExpression->init(thisDocument, m_interface->snapshot());
 
     Scope *scope = thisDocument->scopeAt(line, positionInBlock);
-    QTC_ASSERT(scope != 0, return -1);
+    QTC_ASSERT(scope, return -1);
 
     if (expression.isEmpty()) {
         if (m_model->m_completionOperator == T_EOF_SYMBOL || m_model->m_completionOperator == T_COLON_COLON) {
@@ -1461,7 +1458,7 @@ bool InternalCppCompletionAssistProcessor::globalCompletion(Scope *currentScope)
     }
 
     QList<ClassOrNamespace *> usingBindings;
-    ClassOrNamespace *currentBinding = 0;
+    ClassOrNamespace *currentBinding = nullptr;
 
     for (Scope *scope = currentScope; scope; scope = scope->enclosingScope()) {
         if (Block *block = scope->asBlock()) {
@@ -1543,7 +1540,7 @@ bool InternalCppCompletionAssistProcessor::completeMember(const QList<LookupItem
 
     ResolveExpression resolveExpression(context);
 
-    bool *replaceDotForArrow = 0;
+    bool *replaceDotForArrow = nullptr;
     if (!m_interface->languageFeatures().objCEnabled)
         replaceDotForArrow = &m_model->m_replaceDotForArrow;
 
diff --git a/src/plugins/cpptools/cppcompletionassist.h b/src/plugins/cpptools/cppcompletionassist.h
index 7bb7776940..e22ea38607 100644
--- a/src/plugins/cpptools/cppcompletionassist.h
+++ b/src/plugins/cpptools/cppcompletionassist.h
@@ -62,8 +62,6 @@ class CppAssistProposalModel : public TextEditor::GenericProposalModel
 public:
     CppAssistProposalModel()
         : TextEditor::GenericProposalModel()
-        , m_completionOperator(CPlusPlus::T_EOF_SYMBOL)
-        , m_replaceDotForArrow(false)
         , m_typeOfExpression(new CPlusPlus::TypeOfExpression)
     {
         m_typeOfExpression->setExpandTemplates(true);
@@ -72,8 +70,8 @@ public:
     bool isSortable(const QString &prefix) const override;
     TextEditor::AssistProposalItemInterface *proposalItem(int index) const override;
 
-    unsigned m_completionOperator;
-    bool m_replaceDotForArrow;
+    unsigned m_completionOperator = CPlusPlus::T_EOF_SYMBOL;
+    bool m_replaceDotForArrow = false;
     QSharedPointer<CPlusPlus::TypeOfExpression> m_typeOfExpression;
 };
 
@@ -98,7 +96,7 @@ class InternalCppCompletionAssistProcessor : public CppCompletionAssistProcessor
 {
 public:
     InternalCppCompletionAssistProcessor();
-    ~InternalCppCompletionAssistProcessor();
+    ~InternalCppCompletionAssistProcessor() override;
 
     TextEditor::IAssistProposal *perform(const TextEditor::AssistInterface *interface) override;
 
diff --git a/src/plugins/cpptools/cppcompletionassistprocessor.cpp b/src/plugins/cpptools/cppcompletionassistprocessor.cpp
index 527fd586ab..cf945301ce 100644
--- a/src/plugins/cpptools/cppcompletionassistprocessor.cpp
+++ b/src/plugins/cpptools/cppcompletionassistprocessor.cpp
@@ -41,8 +41,7 @@ using namespace CPlusPlus;
 namespace CppTools {
 
 CppCompletionAssistProcessor::CppCompletionAssistProcessor(int snippetItemOrder)
-    : m_positionForProposal(-1)
-    , m_preprocessorCompletions(
+    : m_preprocessorCompletions(
           QStringList({"define", "error", "include", "line", "pragma", "pragma once",
                        "pragma omp atomic", "pragma omp parallel", "pragma omp for",
                        "pragma omp ordered", "pragma omp parallel for", "pragma omp section",
@@ -50,7 +49,6 @@ CppCompletionAssistProcessor::CppCompletionAssistProcessor(int snippetItemOrder)
                        "pragma omp master", "pragma omp critical", "pragma omp barrier",
                        "pragma omp flush", "pragma omp threadprivate", "undef", "if", "ifdef",
                        "ifndef", "elif", "else", "endif"}))
-    , m_hintProposal(0)
     , m_snippetCollector(QLatin1String(CppEditor::Constants::CPP_SNIPPETS_GROUP_ID),
                          QIcon(QLatin1String(":/texteditor/images/snippet.png")),
                          snippetItemOrder)
diff --git a/src/plugins/cpptools/cppcompletionassistprocessor.h b/src/plugins/cpptools/cppcompletionassistprocessor.h
index 535ce62a5e..4d63bb5dec 100644
--- a/src/plugins/cpptools/cppcompletionassistprocessor.h
+++ b/src/plugins/cpptools/cppcompletionassistprocessor.h
@@ -45,7 +45,7 @@ namespace CppTools {
 class CPPTOOLS_EXPORT CppCompletionAssistProcessor : public TextEditor::IAssistProcessor
 {
 public:
-    CppCompletionAssistProcessor(int snippetItemOrder = 0);
+    explicit CppCompletionAssistProcessor(int snippetItemOrder = 0);
 
 protected:
     void addSnippets();
@@ -60,10 +60,10 @@ protected:
                                 DotAtIncludeCompletionHandler dotAtIncludeCompletionHandler
                                     = DotAtIncludeCompletionHandler());
 
-    int m_positionForProposal;
+    int m_positionForProposal = -1;
     QList<TextEditor::AssistProposalItemInterface *> m_completions;
     QStringList m_preprocessorCompletions;
-    TextEditor::IAssistProposal *m_hintProposal;
+    TextEditor::IAssistProposal *m_hintProposal = nullptr;
 
 private:
     TextEditor::SnippetAssistCollector m_snippetCollector;
diff --git a/src/plugins/cpptools/cppcompletionassistprovider.cpp b/src/plugins/cpptools/cppcompletionassistprovider.cpp
index b5f4ca51ab..a06c4c7b42 100644
--- a/src/plugins/cpptools/cppcompletionassistprovider.cpp
+++ b/src/plugins/cpptools/cppcompletionassistprovider.cpp
@@ -51,7 +51,7 @@ bool CppCompletionAssistProvider::isActivationCharSequence(const QString &sequen
     const QChar &ch  = sequence.at(2);
     const QChar &ch2 = sequence.at(1);
     const QChar &ch3 = sequence.at(0);
-    if (activationSequenceChar(ch, ch2, ch3, 0, true, false) != 0)
+    if (activationSequenceChar(ch, ch2, ch3, nullptr, true, false) != 0)
         return true;
     return false;
 }
diff --git a/src/plugins/cpptools/cppcurrentdocumentfilter.cpp b/src/plugins/cpptools/cppcurrentdocumentfilter.cpp
index c1a0b9f5e4..be1163d168 100644
--- a/src/plugins/cpptools/cppcurrentdocumentfilter.cpp
+++ b/src/plugins/cpptools/cppcurrentdocumentfilter.cpp
@@ -70,7 +70,7 @@ QList<Core::LocatorFilterEntry> CppCurrentDocumentFilter::matchesFor(
         return goodEntries;
 
     const QList<IndexItem::Ptr> items = itemsOfCurrentDocument();
-    for (IndexItem::Ptr info : items) {
+    for (const IndexItem::Ptr &info : items) {
         if (future.isCanceled())
             break;
 
diff --git a/src/plugins/cpptools/cppcurrentdocumentfilter.h b/src/plugins/cpptools/cppcurrentdocumentfilter.h
index 147bb66309..51dd801d84 100644
--- a/src/plugins/cpptools/cppcurrentdocumentfilter.h
+++ b/src/plugins/cpptools/cppcurrentdocumentfilter.h
@@ -43,7 +43,7 @@ class CppCurrentDocumentFilter : public  Core::ILocatorFilter
 
 public:
     explicit CppCurrentDocumentFilter(CppModelManager *manager);
-    ~CppCurrentDocumentFilter() {}
+    ~CppCurrentDocumentFilter() override = default;
 
     QList<Core::LocatorFilterEntry> matchesFor(QFutureInterface<Core::LocatorFilterEntry> &future,
                                                const QString &entry) override;
diff --git a/src/plugins/cpptools/cppelementevaluator.cpp b/src/plugins/cpptools/cppelementevaluator.cpp
index afd8944bde..95932c0e2c 100644
--- a/src/plugins/cpptools/cppelementevaluator.cpp
+++ b/src/plugins/cpptools/cppelementevaluator.cpp
@@ -57,11 +57,9 @@ static QStringList stripName(const QString &name)
     return all;
 }
 
-CppElement::CppElement() : helpCategory(TextEditor::HelpItem::Unknown)
-{}
+CppElement::CppElement() = default;
 
-CppElement::~CppElement()
-{}
+CppElement::~CppElement() = default;
 
 CppClass *CppElement::toCppClass()
 {
@@ -168,7 +166,7 @@ CppClass *CppClass::toCppClass()
 
 void CppClass::lookupBases(Symbol *declaration, const LookupContext &context)
 {
-    typedef QPair<ClassOrNamespace *, CppClass *> Data;
+    using Data = QPair<ClassOrNamespace*, CppClass*>;
 
     if (ClassOrNamespace *clazz = context.lookupType(declaration)) {
         QSet<ClassOrNamespace *> visited;
@@ -199,7 +197,7 @@ void CppClass::lookupBases(Symbol *declaration, const LookupContext &context)
 
 void CppClass::lookupDerived(Symbol *declaration, const Snapshot &snapshot)
 {
-    typedef QPair<CppClass *, CppTools::TypeHierarchy> Data;
+    using Data = QPair<CppClass*, CppTools::TypeHierarchy>;
 
     CppTools::TypeHierarchyBuilder builder(declaration, snapshot);
     const CppTools::TypeHierarchy &completeHierarchy = builder.buildDerivedTypeHierarchy();
@@ -268,7 +266,7 @@ public:
     {
         const FullySpecifiedType &type = declaration->type();
 
-        const Name *typeName = 0;
+        const Name *typeName = nullptr;
         if (type->isNamedType()) {
             typeName = type->asNamedType()->name();
         } else if (type->isPointerType() || type->isReferenceType()) {
@@ -462,7 +460,7 @@ void CppElementEvaluator::handleLookupItemMatch(const Snapshot &snapshot,
                 }
             }
 
-            CppClass *cppClass = new CppClass(declaration);
+            auto cppClass = new CppClass(declaration);
             if (m_lookupBaseClasses)
                 cppClass->lookupBases(declaration, contextToUse);
             if (m_lookupDerivedClasses)
@@ -470,7 +468,7 @@ void CppElementEvaluator::handleLookupItemMatch(const Snapshot &snapshot,
             m_element = QSharedPointer<CppElement>(cppClass);
         } else if (Enum *enumDecl = declaration->asEnum()) {
             m_element = QSharedPointer<CppElement>(new CppEnum(enumDecl));
-        } else if (EnumeratorDeclaration *enumerator = dynamic_cast<EnumeratorDeclaration *>(declaration)) {
+        } else if (auto enumerator = dynamic_cast<EnumeratorDeclaration *>(declaration)) {
             m_element = QSharedPointer<CppElement>(new CppEnumerator(enumerator));
         } else if (declaration->isTypedef()) {
             m_element = QSharedPointer<CppElement>(new CppTypedef(declaration));
diff --git a/src/plugins/cpptools/cppelementevaluator.h b/src/plugins/cpptools/cppelementevaluator.h
index 0bececefaf..04143738c7 100644
--- a/src/plugins/cpptools/cppelementevaluator.h
+++ b/src/plugins/cpptools/cppelementevaluator.h
@@ -93,7 +93,7 @@ public:
 
     virtual CppClass *toCppClass();
 
-    TextEditor::HelpItem::Category helpCategory;
+    TextEditor::HelpItem::Category helpCategory = TextEditor::HelpItem::Unknown;
     QStringList helpIdCandidates;
     QString helpMark;
     Utils::Link link;
diff --git a/src/plugins/cpptools/cppfileiterationorder.cpp b/src/plugins/cpptools/cppfileiterationorder.cpp
index 738106f3d7..dd040e9976 100644
--- a/src/plugins/cpptools/cppfileiterationorder.cpp
+++ b/src/plugins/cpptools/cppfileiterationorder.cpp
@@ -86,9 +86,7 @@ bool operator<(const FileIterationOrder::Entry &first, const FileIterationOrder:
     }
 }
 
-FileIterationOrder::FileIterationOrder()
-{
-}
+FileIterationOrder::FileIterationOrder() = default;
 
 FileIterationOrder::FileIterationOrder(const QString &referenceFilePath,
                                        const QString &referenceProjectPartId)
diff --git a/src/plugins/cpptools/cppfilesettingspage.h b/src/plugins/cpptools/cppfilesettingspage.h
index 4731adc7c9..e5d8faafa8 100644
--- a/src/plugins/cpptools/cppfilesettingspage.h
+++ b/src/plugins/cpptools/cppfilesettingspage.h
@@ -71,8 +71,8 @@ class CppFileSettingsWidget : public QWidget
     Q_OBJECT
 
 public:
-    explicit CppFileSettingsWidget(QWidget *parent = 0);
-    virtual ~CppFileSettingsWidget();
+    explicit CppFileSettingsWidget(QWidget *parent = nullptr);
+    ~CppFileSettingsWidget() override;
 
     CppFileSettings settings() const;
     void setSettings(const CppFileSettings &s);
@@ -89,11 +89,11 @@ class CppFileSettingsPage : public Core::IOptionsPage
 {
 public:
     explicit CppFileSettingsPage(QSharedPointer<CppFileSettings> &settings,
-                                 QObject *parent = 0);
+                                 QObject *parent = nullptr);
 
-    QWidget *widget();
-    void apply();
-    void finish();
+    QWidget *widget() override;
+    void apply() override;
+    void finish() override;
 
 private:
     const QSharedPointer<CppFileSettings> m_settings;
diff --git a/src/plugins/cpptools/cppfindreferences.cpp b/src/plugins/cpptools/cppfindreferences.cpp
index 00f46399ec..867b3d395a 100644
--- a/src/plugins/cpptools/cppfindreferences.cpp
+++ b/src/plugins/cpptools/cppfindreferences.cpp
@@ -218,7 +218,7 @@ public:
         }
 
         CPlusPlus::Control *control = doc->control();
-        if (control->findIdentifier(symbolId->chars(), symbolId->size()) != 0) {
+        if (control->findIdentifier(symbolId->chars(), symbolId->size()) != nullptr) {
             if (doc != symbolDocument)
                 doc->check();
 
@@ -239,7 +239,7 @@ class UpdateUI
     QFutureInterface<CPlusPlus::Usage> *future;
 
 public:
-    UpdateUI(QFutureInterface<CPlusPlus::Usage> *future): future(future) {}
+    explicit UpdateUI(QFutureInterface<CPlusPlus::Usage> *future): future(future) {}
 
     void operator()(QList<CPlusPlus::Usage> &, const QList<CPlusPlus::Usage> &usages)
     {
@@ -258,9 +258,7 @@ CppFindReferences::CppFindReferences(CppModelManager *modelManager)
 {
 }
 
-CppFindReferences::~CppFindReferences()
-{
-}
+CppFindReferences::~CppFindReferences() = default;
 
 QList<int> CppFindReferences::references(CPlusPlus::Symbol *symbol,
                                          const CPlusPlus::LookupContext &context) const
@@ -276,11 +274,11 @@ QList<int> CppFindReferences::references(CPlusPlus::Symbol *symbol,
 
 static void find_helper(QFutureInterface<CPlusPlus::Usage> &future,
                         const WorkingCopy workingCopy,
-                        const CPlusPlus::LookupContext context,
+                        const CPlusPlus::LookupContext &context,
                         CPlusPlus::Symbol *symbol)
 {
     const CPlusPlus::Identifier *symbolId = symbol->identifier();
-    QTC_ASSERT(symbolId != 0, return);
+    QTC_ASSERT(symbolId != nullptr, return);
 
     const CPlusPlus::Snapshot snapshot = context.snapshot();
 
@@ -465,7 +463,7 @@ void CppFindReferences::onReplaceButtonClicked(const QString &text,
 
 void CppFindReferences::searchAgain()
 {
-    SearchResult *search = qobject_cast<SearchResult *>(sender());
+    auto search = qobject_cast<SearchResult *>(sender());
     CppFindReferencesParameters parameters = search->userData().value<CppFindReferencesParameters>();
     parameters.filesToRename.clear();
     CPlusPlus::Snapshot snapshot = CppModelManager::instance()->snapshot();
@@ -483,10 +481,10 @@ namespace {
 class UidSymbolFinder : public CPlusPlus::SymbolVisitor
 {
 public:
-    UidSymbolFinder(const QList<QByteArray> &uid) : m_uid(uid), m_index(0), m_result(0) { }
+    explicit UidSymbolFinder(const QList<QByteArray> &uid) : m_uid(uid) { }
     CPlusPlus::Symbol *result() const { return m_result; }
 
-    bool preVisit(CPlusPlus::Symbol *symbol)
+    bool preVisit(CPlusPlus::Symbol *symbol) override
     {
         if (m_result)
             return false;
@@ -505,7 +503,7 @@ public:
         return true;
     }
 
-    void postVisit(CPlusPlus::Symbol *symbol)
+    void postVisit(CPlusPlus::Symbol *symbol) override
     {
         if (symbol->asScope())
             --m_index;
@@ -513,8 +511,8 @@ public:
 
 private:
     QList<QByteArray> m_uid;
-    int m_index;
-    CPlusPlus::Symbol *m_result;
+    int m_index = 0;
+    CPlusPlus::Symbol *m_result = nullptr;
 };
 }
 
@@ -522,10 +520,10 @@ CPlusPlus::Symbol *CppFindReferences::findSymbol(const CppFindReferencesParamete
                                                  const CPlusPlus::Snapshot &snapshot,
                                                  CPlusPlus::LookupContext *context)
 {
-    QTC_ASSERT(context, return 0);
+    QTC_ASSERT(context, return nullptr);
     QString symbolFile = QLatin1String(parameters.symbolFileName);
     if (!snapshot.contains(symbolFile))
-        return 0;
+        return nullptr;
 
     CPlusPlus::Document::Ptr newSymbolDocument = snapshot.document(symbolFile);
     // document is not parsed and has no bindings yet, do it
@@ -542,7 +540,7 @@ CPlusPlus::Symbol *CppFindReferences::findSymbol(const CppFindReferencesParamete
         *context = CPlusPlus::LookupContext(doc, snapshot);
         return finder.result();
     }
-    return 0;
+    return nullptr;
 }
 
 static void displayResults(SearchResult *search, QFutureWatcher<CPlusPlus::Usage> *watcher,
@@ -661,7 +659,7 @@ restart_search:
     }
 
     static QString matchingLine(unsigned bytesOffsetOfUseStart, const QByteArray &utf8Source,
-                                unsigned *columnOfUseStart = 0)
+                                unsigned *columnOfUseStart = nullptr)
     {
         int lineBegin = utf8Source.lastIndexOf('\n', bytesOffsetOfUseStart) + 1;
         int lineEnd = utf8Source.indexOf('\n', bytesOffsetOfUseStart);
@@ -765,7 +763,7 @@ void CppFindReferences::renameMacroUses(const CPlusPlus::Macro &macro, const QSt
 
 void CppFindReferences::createWatcher(const QFuture<CPlusPlus::Usage> &future, SearchResult *search)
 {
-    QFutureWatcher<CPlusPlus::Usage> *watcher = new QFutureWatcher<CPlusPlus::Usage>();
+    auto watcher = new QFutureWatcher<CPlusPlus::Usage>();
     // auto-delete:
     connect(watcher, &QFutureWatcherBase::finished, watcher, [search, watcher]() {
                 searchFinished(search, watcher);
diff --git a/src/plugins/cpptools/cppfindreferences.h b/src/plugins/cpptools/cppfindreferences.h
index 2dece06883..ce83173444 100644
--- a/src/plugins/cpptools/cppfindreferences.h
+++ b/src/plugins/cpptools/cppfindreferences.h
@@ -63,8 +63,8 @@ class CppFindReferences: public QObject
     Q_OBJECT
 
 public:
-    CppFindReferences(CppModelManager *modelManager);
-    virtual ~CppFindReferences();
+    explicit CppFindReferences(CppModelManager *modelManager);
+    ~CppFindReferences() override;
 
     QList<int> references(CPlusPlus::Symbol *symbol, const CPlusPlus::LookupContext &context) const;
 
diff --git a/src/plugins/cpptools/cppfollowsymbolundercursor.cpp b/src/plugins/cpptools/cppfollowsymbolundercursor.cpp
index 9633bfb6dd..5ec6b572a2 100644
--- a/src/plugins/cpptools/cppfollowsymbolundercursor.cpp
+++ b/src/plugins/cpptools/cppfollowsymbolundercursor.cpp
@@ -59,6 +59,7 @@ public:
                           const Document::Ptr &document,
                           const Snapshot &snapshot,
                           SymbolFinder *symbolFinder);
+    VirtualFunctionHelper() = delete;
 
     bool canLookupVirtualFunctionOverrides(Function *function);
 
@@ -67,7 +68,6 @@ public:
     { return m_staticClassOfFunctionCallExpression; }
 
 private:
-    VirtualFunctionHelper();
     Q_DISABLE_COPY(VirtualFunctionHelper)
 
     Class *staticClassOfFunctionCallExpression_internal() const;
@@ -82,10 +82,10 @@ private:
     SymbolFinder *m_finder;
 
     // Determined
-    ExpressionAST *m_baseExpressionAST;
-    Function *m_function;
-    int m_accessTokenKind;
-    Class *m_staticClassOfFunctionCallExpression; // Output
+    ExpressionAST *m_baseExpressionAST = nullptr;
+    Function *m_function = nullptr;
+    int m_accessTokenKind = 0;
+    Class *m_staticClassOfFunctionCallExpression = nullptr; // Output
 };
 
 VirtualFunctionHelper::VirtualFunctionHelper(TypeOfExpression &typeOfExpression,
@@ -99,10 +99,6 @@ VirtualFunctionHelper::VirtualFunctionHelper(TypeOfExpression &typeOfExpression,
     , m_snapshot(snapshot)
     , m_typeOfExpression(typeOfExpression)
     , m_finder(finder)
-    , m_baseExpressionAST(0)
-    , m_function(0)
-    , m_accessTokenKind(0)
-    , m_staticClassOfFunctionCallExpression(0)
 {
     if (ExpressionAST *expressionAST = typeOfExpression.expressionAST()) {
         if (CallAST *callAST = expressionAST->asCall()) {
@@ -160,9 +156,9 @@ bool VirtualFunctionHelper::canLookupVirtualFunctionOverrides(Function *function
 Class *VirtualFunctionHelper::staticClassOfFunctionCallExpression_internal() const
 {
     if (!m_finder)
-        return 0;
+        return nullptr;
 
-    Class *result = 0;
+    Class *result = nullptr;
 
     if (m_baseExpressionAST->asIdExpression()) {
         for (Scope *s = m_scope; s ; s = s->enclosingScope()) {
@@ -323,14 +319,14 @@ Link attemptFuncDeclDef(const QTextCursor &cursor, Snapshot snapshot,
     for (int i = path.size() - 1; i != -1; --i) {
         AST *node = path.at(i);
 
-        if (node->asParameterDeclaration() != 0)
+        if (node->asParameterDeclaration() != nullptr)
             return result;
     }
 
-    AST *declParent = 0;
-    DeclaratorAST *decl = 0;
+    AST *declParent = nullptr;
+    DeclaratorAST *decl = nullptr;
     for (int i = path.size() - 2; i > 0; --i) {
-        if ((decl = path.at(i)->asDeclarator()) != 0) {
+        if ((decl = path.at(i)->asDeclarator()) != nullptr) {
             declParent = path.at(i - 1);
             break;
         }
@@ -343,7 +339,7 @@ Link attemptFuncDeclDef(const QTextCursor &cursor, Snapshot snapshot,
     if (!funcDecl)
         return result;
 
-    Symbol *target = 0;
+    Symbol *target = nullptr;
     if (FunctionDefinitionAST *funDef = declParent->asFunctionDefinition()) {
         QList<Declaration *> candidates =
                 symbolFinder->findMatchingDeclaration(LookupContext(document, snapshot),
@@ -376,10 +372,10 @@ Link attemptFuncDeclDef(const QTextCursor &cursor, Snapshot snapshot,
 Symbol *findDefinition(Symbol *symbol, const Snapshot &snapshot, SymbolFinder *symbolFinder)
 {
     if (symbol->isFunction())
-        return 0; // symbol is a function definition.
+        return nullptr; // symbol is a function definition.
 
     else if (!symbol->type()->isFunctionType())
-        return 0; // not a function declaration
+        return nullptr; // not a function declaration
 
     return symbolFinder->findMatchingDefinition(symbol, snapshot);
 }
@@ -724,7 +720,7 @@ void FollowSymbolUnderCursor::findLink(
         }
 
         if (Symbol *symbol = result.declaration()) {
-            Symbol *def = 0;
+            Symbol *def = nullptr;
 
             if (resolveTarget) {
                 // Consider to show a pop-up displaying overrides for the function
@@ -759,7 +755,7 @@ void FollowSymbolUnderCursor::findLink(
                 def = findDefinition(symbol, snapshot, symbolFinder);
 
                 if (def == lastVisibleSymbol)
-                    def = 0; // jump to declaration then.
+                    def = nullptr; // jump to declaration then.
 
                 if (symbol->isForwardClassDeclaration()) {
                     def = symbolFinder->findMatchingClassDeclaration(symbol, snapshot);
diff --git a/src/plugins/cpptools/cppfunctionsfilter.cpp b/src/plugins/cpptools/cppfunctionsfilter.cpp
index c7c29fdca1..f2897215df 100644
--- a/src/plugins/cpptools/cppfunctionsfilter.cpp
+++ b/src/plugins/cpptools/cppfunctionsfilter.cpp
@@ -41,9 +41,7 @@ CppFunctionsFilter::CppFunctionsFilter(CppLocatorData *locatorData)
     setIncludedByDefault(false);
 }
 
-CppFunctionsFilter::~CppFunctionsFilter()
-{
-}
+CppFunctionsFilter::~CppFunctionsFilter() = default;
 
 Core::LocatorFilterEntry CppFunctionsFilter::filterEntryFromIndexItem(IndexItem::Ptr info)
 {
diff --git a/src/plugins/cpptools/cppfunctionsfilter.h b/src/plugins/cpptools/cppfunctionsfilter.h
index f052a7a2d2..04ba9b8612 100644
--- a/src/plugins/cpptools/cppfunctionsfilter.h
+++ b/src/plugins/cpptools/cppfunctionsfilter.h
@@ -37,8 +37,8 @@ class CppFunctionsFilter : public CppLocatorFilter
     Q_OBJECT
 
 public:
-    CppFunctionsFilter(CppLocatorData *locatorData);
-    ~CppFunctionsFilter();
+    explicit CppFunctionsFilter(CppLocatorData *locatorData);
+    ~CppFunctionsFilter() override;
 
 protected:
     IndexItem::ItemType matchTypes() const override { return IndexItem::Function; }
diff --git a/src/plugins/cpptools/cppincludesfilter.cpp b/src/plugins/cpptools/cppincludesfilter.cpp
index 679d37b72a..8675a9747a 100644
--- a/src/plugins/cpptools/cppincludesfilter.cpp
+++ b/src/plugins/cpptools/cppincludesfilter.cpp
@@ -48,11 +48,11 @@ class CppIncludesIterator : public BaseFileFilter::Iterator
 public:
     CppIncludesIterator(CPlusPlus::Snapshot snapshot, const QSet<QString> &seedPaths);
 
-    void toFront();
-    bool hasNext() const;
-    QString next();
-    QString filePath() const;
-    QString fileName() const;
+    void toFront() override;
+    bool hasNext() const override;
+    QString next() override;
+    QString filePath() const override;
+    QString fileName() const override;
 
 private:
     void fetchMore();
@@ -184,5 +184,5 @@ void CppIncludesFilter::refresh(QFutureInterface<void> &future)
 void CppIncludesFilter::markOutdated()
 {
     m_needsUpdate = true;
-    setFileIterator(0); // clean up
+    setFileIterator(nullptr); // clean up
 }
diff --git a/src/plugins/cpptools/cppindexingsupport.cpp b/src/plugins/cpptools/cppindexingsupport.cpp
index ea8bee6c7f..cf721301cc 100644
--- a/src/plugins/cpptools/cppindexingsupport.cpp
+++ b/src/plugins/cpptools/cppindexingsupport.cpp
@@ -27,16 +27,13 @@
 
 namespace CppTools {
 
-CppIndexingSupport::~CppIndexingSupport()
-{
-}
+CppIndexingSupport::~CppIndexingSupport() = default;
 
 SymbolSearcher::SymbolSearcher(QObject *parent)
     : QObject(parent)
 {
 }
 
-SymbolSearcher::~SymbolSearcher()
-{}
+SymbolSearcher::~SymbolSearcher() = default;
 
 } // namespace CppTools
diff --git a/src/plugins/cpptools/cppindexingsupport.h b/src/plugins/cpptools/cppindexingsupport.h
index 58b0b26298..e3d9eb257e 100644
--- a/src/plugins/cpptools/cppindexingsupport.h
+++ b/src/plugins/cpptools/cppindexingsupport.h
@@ -81,8 +81,8 @@ public:
     virtual QFuture<void> refreshSourceFiles(const QFutureInterface<void> &superFuture,
                                              const QSet<QString> &sourceFiles,
                                              CppModelManager::ProgressNotificationMode mode) = 0;
-    virtual SymbolSearcher *createSymbolSearcher(SymbolSearcher::Parameters parameters,
-                                                 QSet<QString> fileNames) = 0;
+    virtual SymbolSearcher *createSymbolSearcher(const SymbolSearcher::Parameters &parameters,
+                                                 const QSet<QString> &fileNames) = 0;
 };
 
 } // namespace CppTools
diff --git a/src/plugins/cpptools/cppkitinfo.h b/src/plugins/cpptools/cppkitinfo.h
index 30ff300859..d2f9a871bd 100644
--- a/src/plugins/cpptools/cppkitinfo.h
+++ b/src/plugins/cpptools/cppkitinfo.h
@@ -40,7 +40,7 @@ namespace CppTools {
 class CPPTOOLS_EXPORT KitInfo
 {
 public:
-    KitInfo(ProjectExplorer::Project *project);
+    explicit KitInfo(ProjectExplorer::Project *project);
 
     bool isValid() const;
 
diff --git a/src/plugins/cpptools/cpplocalsymbols.cpp b/src/plugins/cpptools/cpplocalsymbols.cpp
index 49dd63f700..feec5dc606 100644
--- a/src/plugins/cpptools/cpplocalsymbols.cpp
+++ b/src/plugins/cpptools/cpplocalsymbols.cpp
@@ -36,7 +36,7 @@ namespace {
 class FindLocalSymbols: protected ASTVisitor
 {
 public:
-    FindLocalSymbols(Document::Ptr doc)
+    explicit FindLocalSymbols(Document::Ptr doc)
         : ASTVisitor(doc->translationUnit())
     { }
 
@@ -65,7 +65,7 @@ protected:
     using ASTVisitor::visit;
     using ASTVisitor::endVisit;
 
-    typedef TextEditor::HighlightingResult HighlightingResult;
+    using HighlightingResult = TextEditor::HighlightingResult;
 
     void enterScope(Scope *scope)
     {
diff --git a/src/plugins/cpptools/cpplocalsymbols_test.cpp b/src/plugins/cpptools/cpplocalsymbols_test.cpp
index 9183c9bfcd..7ee8ad1723 100644
--- a/src/plugins/cpptools/cpplocalsymbols_test.cpp
+++ b/src/plugins/cpptools/cpplocalsymbols_test.cpp
@@ -38,9 +38,8 @@ namespace {
 class FindFirstFunctionDefinition: protected CPlusPlus::ASTVisitor
 {
 public:
-    FindFirstFunctionDefinition(CPlusPlus::TranslationUnit *translationUnit)
+    explicit FindFirstFunctionDefinition(CPlusPlus::TranslationUnit *translationUnit)
         : ASTVisitor(translationUnit)
-        , m_definition(0)
     {}
 
     CPlusPlus::FunctionDefinitionAST *operator()()
@@ -50,7 +49,7 @@ public:
     }
 
 private:
-    bool preVisit(CPlusPlus::AST *ast)
+    bool preVisit(CPlusPlus::AST *ast) override
     {
         if (CPlusPlus::FunctionDefinitionAST *f = ast->asFunctionDefinition()) {
             m_definition = f;
@@ -60,20 +59,20 @@ private:
     }
 
 private:
-    CPlusPlus::FunctionDefinitionAST *m_definition;
+    CPlusPlus::FunctionDefinitionAST *m_definition = nullptr;
 };
 
 struct Result
 {
-    Result() : line(0), column(0), length(0) {}
+    Result() = default;
     Result(const QByteArray &name, unsigned line, unsigned column, unsigned length)
         : name(name), line(line), column(column), length(length)
     {}
 
     QByteArray name;
-    unsigned line;
-    unsigned column;
-    unsigned length;
+    unsigned line = 0;
+    unsigned column = 0;
+    unsigned length = 0;
 
     bool operator==(const Result &other) const
     {
@@ -139,7 +138,7 @@ void CppToolsPlugin::test_cpplocalsymbols_data()
     QTest::addColumn<QByteArray>("source");
     QTest::addColumn<QList<Result>>("expectedUses");
 
-    typedef QByteArray _;
+    using _ = QByteArray;
 
     QTest::newRow("basic")
         << _("int f(int arg)\n"
diff --git a/src/plugins/cpptools/cpplocatorfilter.cpp b/src/plugins/cpptools/cpplocatorfilter.cpp
index ee2a2db395..6865cbe5a2 100644
--- a/src/plugins/cpptools/cpplocatorfilter.cpp
+++ b/src/plugins/cpptools/cpplocatorfilter.cpp
@@ -46,9 +46,7 @@ CppLocatorFilter::CppLocatorFilter(CppLocatorData *locatorData)
     setIncludedByDefault(false);
 }
 
-CppLocatorFilter::~CppLocatorFilter()
-{
-}
+CppLocatorFilter::~CppLocatorFilter() = default;
 
 Core::LocatorFilterEntry CppLocatorFilter::filterEntryFromIndexItem(IndexItem::Ptr info)
 {
diff --git a/src/plugins/cpptools/cpplocatorfilter.h b/src/plugins/cpptools/cpplocatorfilter.h
index 971fec9e33..129c5cc08a 100644
--- a/src/plugins/cpptools/cpplocatorfilter.h
+++ b/src/plugins/cpptools/cpplocatorfilter.h
@@ -38,7 +38,7 @@ class CppLocatorFilter : public Core::ILocatorFilter
     Q_OBJECT
 
 public:
-    CppLocatorFilter(CppLocatorData *locatorData);
+    explicit CppLocatorFilter(CppLocatorData *locatorData);
     ~CppLocatorFilter() override;
 
     QList<Core::LocatorFilterEntry> matchesFor(QFutureInterface<Core::LocatorFilterEntry> &future,
diff --git a/src/plugins/cpptools/cpplocatorfilter_test.cpp b/src/plugins/cpptools/cpplocatorfilter_test.cpp
index e7a1775fd7..8c6f50390f 100644
--- a/src/plugins/cpptools/cpplocatorfilter_test.cpp
+++ b/src/plugins/cpptools/cpplocatorfilter_test.cpp
@@ -82,8 +82,8 @@ public:
     }
 
 private:
-    void doBeforeLocatorRun() { QVERIFY(parseFiles(m_fileName)); }
-    void doAfterLocatorRun() { QVERIFY(garbageCollectGlobalSnapshot()); }
+    void doBeforeLocatorRun() override { QVERIFY(parseFiles(m_fileName)); }
+    void doAfterLocatorRun() override { QVERIFY(garbageCollectGlobalSnapshot()); }
 
 private:
     const QString m_fileName;
@@ -97,7 +97,6 @@ public:
     CppCurrentDocumentFilterTestCase(const QString &fileName,
                                      const ResultDataList &expectedResults)
         : BasicLocatorFilterTest(CppTools::CppModelManager::instance()->currentDocumentFilter())
-        , m_editor(0)
         , m_fileName(fileName)
     {
         QVERIFY(succeededSoFar());
@@ -113,7 +112,7 @@ public:
     }
 
 private:
-    void doBeforeLocatorRun()
+    void doBeforeLocatorRun() override
     {
         QVERIFY(DocumentModel::openedDocuments().isEmpty());
         QVERIFY(garbageCollectGlobalSnapshot());
@@ -124,7 +123,7 @@ private:
         QVERIFY(waitForFileInGlobalSnapshot(m_fileName));
     }
 
-    void doAfterLocatorRun()
+    void doAfterLocatorRun() override
     {
         QVERIFY(closeEditorWithoutGarbageCollectorInvocation(m_editor));
         QCoreApplication::processEvents();
@@ -133,7 +132,7 @@ private:
     }
 
 private:
-    IEditor *m_editor;
+    IEditor *m_editor = nullptr;
     const QString m_fileName;
 };
 
diff --git a/src/plugins/cpptools/cppmodelmanager.cpp b/src/plugins/cpptools/cppmodelmanager.cpp
index 4db2cbb1b9..45ab82efec 100644
--- a/src/plugins/cpptools/cppmodelmanager.cpp
+++ b/src/plugins/cpptools/cppmodelmanager.cpp
@@ -95,7 +95,7 @@ class DumpAST: protected ASTVisitor
 public:
     int depth;
 
-    DumpAST(Control *control)
+    explicit DumpAST(Control *control)
         : ASTVisitor(control), depth(0)
     { }
 
@@ -511,7 +511,7 @@ CppModelManager::CppModelManager()
     : CppModelManagerBase(nullptr)
     , d(new CppModelManagerPrivate)
 {
-    d->m_indexingSupporter = 0;
+    d->m_indexingSupporter = nullptr;
     d->m_enableGC = true;
 
     qRegisterMetaType<QSet<QString> >();
@@ -696,7 +696,7 @@ void CppModelManager::removeExtraEditorSupport(AbstractEditorSupport *editorSupp
 CppEditorDocumentHandle *CppModelManager::cppEditorDocument(const QString &filePath) const
 {
     if (filePath.isEmpty())
-        return 0;
+        return nullptr;
 
     QMutexLocker locker(&d->m_cppEditorDocumentsMutex);
     return d->m_cppEditorDocuments.value(filePath, 0);
@@ -987,7 +987,7 @@ void CppModelManager::watchForCanceledProjectIndexer(const QVector<QFuture<void>
         if (future.isCanceled() || future.isFinished())
             continue;
 
-        QFutureWatcher<void> *watcher = new QFutureWatcher<void>();
+        auto watcher = new QFutureWatcher<void>();
         connect(watcher, &QFutureWatcher<void>::canceled, this, [this, project, watcher]() {
             if (d->m_projectToIndexerCanceled.contains(project)) // Project not yet removed
                 d->m_projectToIndexerCanceled.insert(project, true);
@@ -1411,7 +1411,7 @@ void CppModelManager::setIndexingSupport(CppIndexingSupport *indexingSupport)
 {
     if (indexingSupport) {
         if (dynamic_cast<BuiltinIndexingSupport *>(indexingSupport))
-            d->m_indexingSupporter = 0;
+            d->m_indexingSupporter = nullptr;
         else
             d->m_indexingSupporter = indexingSupport;
     }
diff --git a/src/plugins/cpptools/cppmodelmanager.h b/src/plugins/cpptools/cppmodelmanager.h
index 9726c8086f..0eac5abf87 100644
--- a/src/plugins/cpptools/cppmodelmanager.h
+++ b/src/plugins/cpptools/cppmodelmanager.h
@@ -90,7 +90,7 @@ class CPPTOOLS_EXPORT CppModelManager final : public CPlusPlus::CppModelManagerB
     Q_OBJECT
 
 public:
-    typedef CPlusPlus::Document Document;
+    using Document = CPlusPlus::Document;
 
 public:
     CppModelManager();
@@ -136,7 +136,7 @@ public:
     Document::Ptr document(const QString &fileName) const;
     bool replaceDocument(Document::Ptr newDoc);
 
-    void emitDocumentUpdated(CPlusPlus::Document::Ptr doc);
+    void emitDocumentUpdated(Document::Ptr doc);
     void emitAbstractEditorSupportContentsUpdated(const QString &filePath,
                                                   const QByteArray &contents);
     void emitAbstractEditorSupportRemoved(const QString &filePath);
@@ -165,7 +165,7 @@ public:
     void globalFollowSymbol(const CursorInEditor &data,
                             Utils::ProcessLinkCallback &&processLinkCallback,
                             const CPlusPlus::Snapshot &snapshot,
-                            const CPlusPlus::Document::Ptr &documentFromSemanticInfo,
+                            const Document::Ptr &documentFromSemanticInfo,
                             SymbolFinder *symbolFinder,
                             bool inNextSplit) const final;
 
diff --git a/src/plugins/cpptools/cppmodelmanager_test.cpp b/src/plugins/cpptools/cppmodelmanager_test.cpp
index e3d40ecc5f..aac046745b 100644
--- a/src/plugins/cpptools/cppmodelmanager_test.cpp
+++ b/src/plugins/cpptools/cppmodelmanager_test.cpp
@@ -55,7 +55,7 @@ using namespace CppTools::Internal;
 using namespace CppTools::Tests;
 using namespace ProjectExplorer;
 
-typedef CPlusPlus::Document Document;
+using CPlusPlus::Document;
 
 Q_DECLARE_METATYPE(ProjectFile)
 
@@ -66,7 +66,7 @@ inline QString _(const QByteArray &ba) { return QString::fromLatin1(ba, ba.size(
 class MyTestDataDir : public Core::Tests::TestDataDir
 {
 public:
-    MyTestDataDir(const QString &dir)
+    explicit MyTestDataDir(const QString &dir)
         : TestDataDir(_(SRCDIR "/../../../tests/cppmodelmanager/") + dir)
     {}
 
@@ -93,7 +93,7 @@ QStringList toAbsolutePaths(const QStringList &relativePathList,
 class ProjectCreator
 {
 public:
-    ProjectCreator(ModelManagerTestHelper *modelManagerTestHelper)
+    explicit ProjectCreator(ModelManagerTestHelper *modelManagerTestHelper)
         : modelManagerTestHelper(modelManagerTestHelper)
     {}
 
@@ -125,7 +125,7 @@ public:
 class FileChangerAndRestorer
 {
 public:
-    FileChangerAndRestorer(const QString &filePath)
+    explicit FileChangerAndRestorer(const QString &filePath)
         : m_filePath(filePath)
     {
     }
@@ -328,7 +328,7 @@ void CppToolsPlugin::test_modelmanager_refresh_several_times()
 
     CPlusPlus::Snapshot snapshot;
     QSet<QString> refreshedFiles;
-    CPlusPlus::Document::Ptr document;
+    Document::Ptr document;
 
     ProjectExplorer::Macros macros = {{"FIRST_DEFINE"}};
     for (int i = 0; i < 2; ++i) {
@@ -714,7 +714,7 @@ void CppToolsPlugin::test_modelmanager_dont_gc_opened_files()
 namespace {
 struct EditorCloser {
     Core::IEditor *editor;
-    EditorCloser(Core::IEditor *editor): editor(editor) {}
+    explicit EditorCloser(Core::IEditor *editor): editor(editor) {}
     ~EditorCloser()
     {
         using namespace CppTools;
@@ -785,10 +785,10 @@ void CppToolsPlugin::test_modelmanager_defines_per_project()
         {_("one"), main1File},
         {_("two"), main2File}
     };
-    const int size = sizeof(d) / sizeof(d[0]);
-    for (int i = 0; i < size; ++i) {
-        const QString firstDeclarationName = d[i].firstDeclarationName;
-        const QString fileName = d[i].fileName;
+
+    for (auto &i : d) {
+        const QString firstDeclarationName = i.firstDeclarationName;
+        const QString fileName = i.fileName;
 
         Core::IEditor *editor = Core::EditorManager::openEditor(fileName);
         EditorCloser closer(editor);
@@ -852,11 +852,10 @@ void CppToolsPlugin::test_modelmanager_precompiled_headers()
         {_("one"), _("ClassInPch1"), main1File},
         {_("two"), _("ClassInPch2"), main2File}
     };
-    const int size = sizeof(d) / sizeof(d[0]);
-    for (int i = 0; i < size; ++i) {
-        const QString firstDeclarationName = d[i].firstDeclarationName;
-        const QByteArray firstClassInPchFile = d[i].firstClassInPchFile.toUtf8();
-        const QString fileName = d[i].fileName;
+    for (auto &i : d) {
+        const QString firstDeclarationName = i.firstDeclarationName;
+        const QByteArray firstClassInPchFile = i.firstClassInPchFile.toUtf8();
+        const QString fileName = i.fileName;
 
         Core::IEditor *editor = Core::EditorManager::openEditor(fileName);
         EditorCloser closer(editor);
@@ -929,10 +928,9 @@ void CppToolsPlugin::test_modelmanager_defines_per_editor()
         {_("#define SUB1\n"), _("one")},
         {_("#define SUB2\n"), _("two")}
     };
-    const int size = sizeof(d) / sizeof(d[0]);
-    for (int i = 0; i < size; ++i) {
-        const QString editorDefines = d[i].editorDefines;
-        const QString firstDeclarationName = d[i].firstDeclarationName;
+    for (auto &i : d) {
+        const QString editorDefines = i.editorDefines;
+        const QString firstDeclarationName = i.firstDeclarationName;
 
         Core::IEditor *editor = Core::EditorManager::openEditor(main1File);
         EditorCloser closer(editor);
diff --git a/src/plugins/cpptools/cppmodelmanagerinterface.h b/src/plugins/cpptools/cppmodelmanagerinterface.h
index cd3fbc615a..e8f72f7394 100644
--- a/src/plugins/cpptools/cppmodelmanagerinterface.h
+++ b/src/plugins/cpptools/cppmodelmanagerinterface.h
@@ -35,6 +35,6 @@ public:
     virtual ProjectPart::Ptr projectPartForId(const QString &projectPartId) const = 0;
 
 protected:
-    ~CppModelManagerInterface() = default;
+    virtual ~CppModelManagerInterface() = default;
 };
 }
diff --git a/src/plugins/cpptools/cppmodelmanagersupport.cpp b/src/plugins/cpptools/cppmodelmanagersupport.cpp
index 81d745d6d1..efc1a1c518 100644
--- a/src/plugins/cpptools/cppmodelmanagersupport.cpp
+++ b/src/plugins/cpptools/cppmodelmanagersupport.cpp
@@ -27,6 +27,4 @@
 
 using namespace CppTools;
 
-ModelManagerSupport::~ModelManagerSupport()
-{
-}
+ModelManagerSupport::~ModelManagerSupport() = default;
diff --git a/src/plugins/cpptools/cppmodelmanagersupport.h b/src/plugins/cpptools/cppmodelmanagersupport.h
index c5457cd51f..462060a5a9 100644
--- a/src/plugins/cpptools/cppmodelmanagersupport.h
+++ b/src/plugins/cpptools/cppmodelmanagersupport.h
@@ -65,7 +65,7 @@ public:
 class CPPTOOLS_EXPORT ModelManagerSupportProvider
 {
 public:
-    virtual ~ModelManagerSupportProvider() {}
+    virtual ~ModelManagerSupportProvider() = default;
 
     virtual QString id() const = 0;
     virtual QString displayName() const = 0;
diff --git a/src/plugins/cpptools/cppoverviewmodel.cpp b/src/plugins/cpptools/cppoverviewmodel.cpp
index 8c720b75ca..e0fc805698 100644
--- a/src/plugins/cpptools/cppoverviewmodel.cpp
+++ b/src/plugins/cpptools/cppoverviewmodel.cpp
@@ -50,7 +50,7 @@ QVariant SymbolItem::data(int /*column*/, int role) const
         }
     }
 
-    OverviewModel *overviewModel = qobject_cast<OverviewModel *>(model());
+    auto overviewModel = qobject_cast<const OverviewModel*>(model());
     if (!symbol || !overviewModel)
         return QVariant();
 
@@ -150,7 +150,7 @@ Symbol *OverviewModel::symbolFromIndex(const QModelIndex &index) const
 {
     if (!index.isValid())
         return nullptr;
-    SymbolItem *item = static_cast<SymbolItem *>(itemForIndex(index));
+    auto item = static_cast<const SymbolItem*>(itemForIndex(index));
     return item ? item->symbol : nullptr;
 }
 
diff --git a/src/plugins/cpptools/cppoverviewmodel.h b/src/plugins/cpptools/cppoverviewmodel.h
index 0a7870ed28..44a45ace36 100644
--- a/src/plugins/cpptools/cppoverviewmodel.h
+++ b/src/plugins/cpptools/cppoverviewmodel.h
@@ -36,7 +36,7 @@ class SymbolItem : public Utils::TreeItem
 {
 public:
     SymbolItem() = default;
-    SymbolItem(CPlusPlus::Symbol *symbol) : symbol(symbol) {}
+    explicit SymbolItem(CPlusPlus::Symbol *symbol) : symbol(symbol) {}
 
     QVariant data(int column, int role) const override;
 
diff --git a/src/plugins/cpptools/cpppointerdeclarationformatter.h b/src/plugins/cpptools/cpppointerdeclarationformatter.h
index 8eab4a88a8..20ed9557bc 100644
--- a/src/plugins/cpptools/cpppointerdeclarationformatter.h
+++ b/src/plugins/cpptools/cpppointerdeclarationformatter.h
@@ -100,10 +100,10 @@ protected:
 private:
     class TokenRange {
     public:
-        TokenRange() : start(0), end(0) {}
+        TokenRange() = default;
         TokenRange(unsigned start, unsigned end) : start(start), end(end) {}
-        unsigned start;
-        unsigned end;
+        unsigned start = 0;
+        unsigned end = 0;
     };
 
     void processIfWhileForStatement(ExpressionAST *expression, Symbol *symbol);
diff --git a/src/plugins/cpptools/cpppointerdeclarationformatter_test.cpp b/src/plugins/cpptools/cpppointerdeclarationformatter_test.cpp
index 405967b062..f412c9ab69 100644
--- a/src/plugins/cpptools/cpppointerdeclarationformatter_test.cpp
+++ b/src/plugins/cpptools/cpppointerdeclarationformatter_test.cpp
@@ -91,7 +91,7 @@ public:
 
         // Preprocess source
         Environment env;
-        Preprocessor preprocess(0, &env);
+        Preprocessor preprocess(nullptr, &env);
         const QByteArray preprocessedSource = preprocess.run(filePath, sourceWithoutCursorMarker);
 
         Document::Ptr document = Document::create(filePath);
@@ -122,7 +122,7 @@ public:
         Overview overview;
         overview.showReturnTypes = true;
         overview.showArgumentNames = true;
-        overview.starBindFlags = Overview::StarBindFlags(0);
+        overview.starBindFlags = Overview::StarBindFlags(nullptr);
 
         // Run the formatter
         PointerDeclarationFormatter formatter(cppRefactoringFile, overview, cursorHandling);
diff --git a/src/plugins/cpptools/cppprojectfilecategorizer.cpp b/src/plugins/cpptools/cppprojectfilecategorizer.cpp
index d0f4940052..ddb841f9de 100644
--- a/src/plugins/cpptools/cppprojectfilecategorizer.cpp
+++ b/src/plugins/cpptools/cppprojectfilecategorizer.cpp
@@ -31,7 +31,7 @@ namespace CppTools {
 
 ProjectFileCategorizer::ProjectFileCategorizer(const QString &projectPartName,
                                                const QStringList &filePaths,
-                                               FileClassifier fileClassifier)
+                                               const FileClassifier &fileClassifier)
     : m_partName(projectPartName)
 {
     const ProjectFiles ambiguousHeaders = classifyFiles(filePaths, fileClassifier);
@@ -53,7 +53,7 @@ QString ProjectFileCategorizer::partName(const QString &languageName) const
 }
 
 ProjectFiles ProjectFileCategorizer::classifyFiles(const QStringList &filePaths,
-                                                   FileClassifier fileClassifier)
+                                                   const FileClassifier &fileClassifier)
 {
     ProjectFiles ambiguousHeaders;
 
diff --git a/src/plugins/cpptools/cppprojectfilecategorizer.h b/src/plugins/cpptools/cppprojectfilecategorizer.h
index cecf279174..48cd2438c6 100644
--- a/src/plugins/cpptools/cppprojectfilecategorizer.h
+++ b/src/plugins/cpptools/cppprojectfilecategorizer.h
@@ -41,7 +41,7 @@ public:
 public:
     ProjectFileCategorizer(const QString &projectPartName,
                            const QStringList &filePaths,
-                           FileClassifier fileClassifier = FileClassifier());
+                           const FileClassifier &fileClassifier = FileClassifier());
 
     bool hasCSources() const { return !m_cSources.isEmpty(); }
     bool hasCxxSources() const { return !m_cxxSources.isEmpty(); }
@@ -59,7 +59,7 @@ public:
     QString partName(const QString &languageName) const;
 
 private:
-    ProjectFiles classifyFiles(const QStringList &filePaths, FileClassifier fileClassifier);
+    ProjectFiles classifyFiles(const QStringList &filePaths, const FileClassifier &fileClassifier);
     void expandSourcesWithAmbiguousHeaders(const ProjectFiles &ambiguousHeaders);
 
 private:
diff --git a/src/plugins/cpptools/cppprojectpartchooser.cpp b/src/plugins/cpptools/cppprojectpartchooser.cpp
index ebdb8c696e..548ccbe6f2 100644
--- a/src/plugins/cpptools/cppprojectpartchooser.cpp
+++ b/src/plugins/cpptools/cppprojectpartchooser.cpp
@@ -77,7 +77,7 @@ public:
     }
 
 private:
-    QList<PrioritizedProjectPart> prioritize(const QList<ProjectPart::Ptr> &projectParts)
+    QList<PrioritizedProjectPart> prioritize(const QList<ProjectPart::Ptr> &projectParts) const
     {
         // Prioritize
         QList<PrioritizedProjectPart> prioritized = Utils::transform(projectParts,
diff --git a/src/plugins/cpptools/cppqtstyleindenter.cpp b/src/plugins/cpptools/cppqtstyleindenter.cpp
index 2c8f06336f..54cb3cc9ed 100644
--- a/src/plugins/cpptools/cppqtstyleindenter.cpp
+++ b/src/plugins/cpptools/cppqtstyleindenter.cpp
@@ -37,15 +37,13 @@
 using namespace CppTools;
 
 CppQtStyleIndenter::CppQtStyleIndenter()
-    : m_cppCodeStylePreferences(0)
 {
     // Just for safety. setCodeStylePreferences should be called when the editor the
     // indenter belongs to gets initialized.
     m_cppCodeStylePreferences = CppToolsSettings::instance()->cppCodeStyle();
 }
 
-CppQtStyleIndenter::~CppQtStyleIndenter()
-{}
+CppQtStyleIndenter::~CppQtStyleIndenter() = default;
 
 bool CppQtStyleIndenter::isElectricCharacter(const QChar &ch) const
 {
@@ -157,8 +155,7 @@ void CppQtStyleIndenter::indent(QTextDocument *doc,
 
 void CppQtStyleIndenter::setCodeStylePreferences(TextEditor::ICodeStylePreferences *preferences)
 {
-    CppCodeStylePreferences *cppCodeStylePreferences
-            = qobject_cast<CppCodeStylePreferences *>(preferences);
+    auto cppCodeStylePreferences = qobject_cast<CppCodeStylePreferences *>(preferences);
     if (cppCodeStylePreferences)
         m_cppCodeStylePreferences = cppCodeStylePreferences;
 }
diff --git a/src/plugins/cpptools/cppqtstyleindenter.h b/src/plugins/cpptools/cppqtstyleindenter.h
index 110e055908..05a36c883e 100644
--- a/src/plugins/cpptools/cppqtstyleindenter.h
+++ b/src/plugins/cpptools/cppqtstyleindenter.h
@@ -63,7 +63,7 @@ public:
                                                          const TextEditor::TabSettings &tabSettings) override;
 private:
     CppCodeStyleSettings codeStyleSettings() const;
-    CppCodeStylePreferences *m_cppCodeStylePreferences;
+    CppCodeStylePreferences *m_cppCodeStylePreferences = nullptr;
 };
 
 } // CppTools
diff --git a/src/plugins/cpptools/cpprawprojectpart.cpp b/src/plugins/cpptools/cpprawprojectpart.cpp
index 5c9185f13b..ee18166c05 100644
--- a/src/plugins/cpptools/cpprawprojectpart.cpp
+++ b/src/plugins/cpptools/cpprawprojectpart.cpp
@@ -48,7 +48,7 @@ void RawProjectPart::setDisplayName(const QString &displayName)
     this->displayName = displayName;
 }
 
-void RawProjectPart::setFiles(const QStringList &files, FileClassifier fileClassifier)
+void RawProjectPart::setFiles(const QStringList &files, const FileClassifier &fileClassifier)
 {
     this->files = files;
     this->fileClassifier = fileClassifier;
diff --git a/src/plugins/cpptools/cpprawprojectpart.h b/src/plugins/cpptools/cpprawprojectpart.h
index c62b6fcc1f..43e3067753 100644
--- a/src/plugins/cpptools/cpprawprojectpart.h
+++ b/src/plugins/cpptools/cpprawprojectpart.h
@@ -52,8 +52,6 @@ public:
 class CPPTOOLS_EXPORT RawProjectPart
 {
 public:
-    RawProjectPart() {}
-
     void setDisplayName(const QString &displayName);
 
     void setProjectFileLocation(const QString &projectFile, int line = -1, int column = -1);
@@ -62,7 +60,7 @@ public:
 
     // FileClassifier must be thread-safe.
     using FileClassifier = std::function<ProjectFile(const QString &filePath)>;
-    void setFiles(const QStringList &files, FileClassifier fileClassifier = FileClassifier());
+    void setFiles(const QStringList &files, const FileClassifier &fileClassifier = FileClassifier());
     void setHeaderPaths(const ProjectExplorer::HeaderPaths &headerPaths);
     void setIncludePaths(const QStringList &includePaths);
     void setPreCompiledHeaders(const QStringList &preCompiledHeaders);
diff --git a/src/plugins/cpptools/cpprefactoringchanges.cpp b/src/plugins/cpptools/cpprefactoringchanges.cpp
index c554c9d9f0..929a6ec020 100644
--- a/src/plugins/cpptools/cpprefactoringchanges.cpp
+++ b/src/plugins/cpptools/cpprefactoringchanges.cpp
@@ -43,7 +43,7 @@ namespace CppTools {
 class CppRefactoringChangesData : public TextEditor::RefactoringChangesData
 {
 public:
-    CppRefactoringChangesData(const Snapshot &snapshot)
+    explicit CppRefactoringChangesData(const Snapshot &snapshot)
         : m_snapshot(snapshot)
         , m_modelManager(CppModelManager::instance())
         , m_workingCopy(m_modelManager->workingCopy())
@@ -107,7 +107,7 @@ CppRefactoringFilePtr CppRefactoringChanges::file(const QString &fileName) const
 
 CppRefactoringFileConstPtr CppRefactoringChanges::fileNoEditor(const QString &fileName) const
 {
-    QTextDocument *document = 0;
+    QTextDocument *document = nullptr;
     if (data()->m_workingCopy.contains(fileName))
         document = new QTextDocument(QString::fromUtf8(data()->m_workingCopy.source(fileName)));
     CppRefactoringFilePtr result(new CppRefactoringFile(document, fileName));
diff --git a/src/plugins/cpptools/cpprefactoringchanges.h b/src/plugins/cpptools/cpprefactoringchanges.h
index a227bdf42d..3a547a90c5 100644
--- a/src/plugins/cpptools/cpprefactoringchanges.h
+++ b/src/plugins/cpptools/cpprefactoringchanges.h
@@ -36,8 +36,8 @@ namespace CppTools {
 class CppRefactoringChanges;
 class CppRefactoringFile;
 class CppRefactoringChangesData;
-typedef QSharedPointer<CppRefactoringFile> CppRefactoringFilePtr;
-typedef QSharedPointer<const CppRefactoringFile> CppRefactoringFileConstPtr;
+using CppRefactoringFilePtr = QSharedPointer<CppRefactoringFile>;
+using CppRefactoringFileConstPtr = QSharedPointer<const CppRefactoringFile>;
 
 class CPPTOOLS_EXPORT CppRefactoringFile: public TextEditor::RefactoringFile
 {
@@ -69,7 +69,7 @@ public:
 protected:
     CppRefactoringFile(const QString &fileName, const QSharedPointer<TextEditor::RefactoringChangesData> &data);
     CppRefactoringFile(QTextDocument *document, const QString &fileName);
-    CppRefactoringFile(TextEditor::TextEditorWidget *editor);
+    explicit CppRefactoringFile(TextEditor::TextEditorWidget *editor);
 
     CppRefactoringChangesData *data() const;
     void fileChanged() override;
@@ -82,7 +82,7 @@ protected:
 class CPPTOOLS_EXPORT CppRefactoringChanges: public TextEditor::RefactoringChanges
 {
 public:
-    CppRefactoringChanges(const CPlusPlus::Snapshot &snapshot);
+    explicit CppRefactoringChanges(const CPlusPlus::Snapshot &snapshot);
 
     static CppRefactoringFilePtr file(TextEditor::TextEditorWidget *editor,
                                       const CPlusPlus::Document::Ptr &document);
diff --git a/src/plugins/cpptools/cppselectionchanger.cpp b/src/plugins/cpptools/cppselectionchanger.cpp
index 59ac0a1634..e19c1711a6 100644
--- a/src/plugins/cpptools/cppselectionchanger.cpp
+++ b/src/plugins/cpptools/cppselectionchanger.cpp
@@ -51,14 +51,8 @@ using namespace CppTools::Internal;
 
 CppSelectionChanger::CppSelectionChanger(QObject *parent)
     : QObject(parent)
-    , m_initialChangeSelectionCursor()
-    , m_workingCursor()
-    , m_doc(0)
-    , m_unit(0)
-    , m_direction(ExpandSelection)
     , m_changeSelectionNodeIndex(kChangeSelectionNodeIndexNotSet)
     , m_nodeCurrentStep(kChangeSelectionNodeIndexNotSet)
-    , m_inChangeSelection(false)
 {
 }
 
@@ -337,7 +331,7 @@ ASTNodePositions CppSelectionChanger::findRelevantASTPositionsFromCursor(
 }
 
 ASTNodePositions CppSelectionChanger::findRelevantASTPositionsFromCursorWhenNodeIndexNotSet(
-        const QList<AST *> astPath,
+        const QList<AST *> &astPath,
         const QTextCursor &cursor)
 {
     // Find relevant AST node from cursor, when the user expands for the first time.
@@ -345,19 +339,18 @@ ASTNodePositions CppSelectionChanger::findRelevantASTPositionsFromCursorWhenNode
 }
 
 ASTNodePositions CppSelectionChanger::findRelevantASTPositionsFromCursorWhenWholeDocumentSelected(
-        const QList<AST *> astPath,
+        const QList<AST *> &astPath,
         const QTextCursor &cursor)
 {
     // Can't expand more, because whole document is selected.
     if (m_direction == ExpandSelection)
-        return 0;
+        return {};
 
     // In case of shrink, select the next smaller selection.
     return findRelevantASTPositionsFromCursor(astPath, cursor);
 }
 
-ASTNodePositions CppSelectionChanger::findRelevantASTPositionsFromCursorFromPreviousNodeIndex(
-        const QList<AST *> astPath,
+ASTNodePositions CppSelectionChanger::findRelevantASTPositionsFromCursorFromPreviousNodeIndex(const QList<AST *> &astPath,
         const QTextCursor &cursor)
 {
     ASTNodePositions nodePositions;
@@ -377,13 +370,13 @@ ASTNodePositions CppSelectionChanger::findRelevantASTPositionsFromCursorFromPrev
         if (newAstIndex < 0 || newAstIndex >= astPath.count()) {
             if (debug)
                 qDebug() << "Skipping expansion because there is no available next AST node.";
-            return 0;
+            return {};
         }
 
         // Switch to next AST and set the first step.
         nodePositions = findRelevantASTPositionsFromCursor(astPath, cursor, newAstIndex);
         if (!nodePositions)
-            return 0;
+            return {};
 
         if (debug)
             qDebug() << "Moved to next AST node.";
@@ -419,7 +412,7 @@ ASTNodePositions CppSelectionChanger::findNextASTStepPositions(const QTextCursor
 #endif
 
     if (astPath.size() == 0)
-        return 0;
+        return {};
 
     ASTNodePositions currentNodePositions;
     if (m_changeSelectionNodeIndex == kChangeSelectionNodeIndexNotSet) {
@@ -439,7 +432,7 @@ ASTNodePositions CppSelectionChanger::findNextASTStepPositions(const QTextCursor
                  << "current step:" << m_nodeCurrentStep;
     }
 
-    QTC_ASSERT(m_nodeCurrentStep >= 1, return 0);
+    QTC_ASSERT(m_nodeCurrentStep >= 1, return {});
 
     return currentNodePositions;
 }
diff --git a/src/plugins/cpptools/cppselectionchanger.h b/src/plugins/cpptools/cppselectionchanger.h
index d205e2ce2e..487e8ff655 100644
--- a/src/plugins/cpptools/cppselectionchanger.h
+++ b/src/plugins/cpptools/cppselectionchanger.h
@@ -38,8 +38,8 @@ namespace CppTools {
 
 class ASTNodePositions {
 public:
-    ASTNodePositions() {}
-    ASTNodePositions(CPlusPlus::AST *_ast) : ast(_ast) {}
+    ASTNodePositions() = default;
+    explicit ASTNodePositions(CPlusPlus::AST *_ast) : ast(_ast) {}
     operator bool() const { return ast; }
 
     CPlusPlus::AST *ast = nullptr;
@@ -97,13 +97,13 @@ private:
                                               const QTextCursor &cursor,
                                               int startingFromNodeIndex = -1);
     ASTNodePositions findRelevantASTPositionsFromCursorWhenNodeIndexNotSet(
-            const QList<CPlusPlus::AST *> astPath,
+            const QList<CPlusPlus::AST *> &astPath,
             const QTextCursor &cursor);
     ASTNodePositions findRelevantASTPositionsFromCursorWhenWholeDocumentSelected(
-            const QList<CPlusPlus::AST *> astPath,
+            const QList<CPlusPlus::AST *> &astPath,
             const QTextCursor &cursor);
     ASTNodePositions findRelevantASTPositionsFromCursorFromPreviousNodeIndex(
-            const QList<CPlusPlus::AST *> astPath,
+            const QList<CPlusPlus::AST *> &astPath,
             const QTextCursor &cursor);
     bool shouldSkipASTNodeBasedOnPosition(const ASTNodePositions &positions,
                                           const QTextCursor &cursor) const;
@@ -115,11 +115,11 @@ private:
     QTextCursor m_initialChangeSelectionCursor;
     QTextCursor m_workingCursor;
     CPlusPlus::Document::Ptr m_doc;
-    CPlusPlus::TranslationUnit *m_unit;
-    Direction m_direction;
-    int m_changeSelectionNodeIndex;
-    int m_nodeCurrentStep;
-    bool m_inChangeSelection;
+    CPlusPlus::TranslationUnit *m_unit = nullptr;
+    Direction m_direction = ExpandSelection;
+    int m_changeSelectionNodeIndex = -1;
+    int m_nodeCurrentStep = -1;
+    bool m_inChangeSelection = false;
 };
 
 } // namespace CppTools
diff --git a/src/plugins/cpptools/cppsemanticinfoupdater.cpp b/src/plugins/cpptools/cppsemanticinfoupdater.cpp
index 5913c808cf..0c94c7715c 100644
--- a/src/plugins/cpptools/cppsemanticinfoupdater.cpp
+++ b/src/plugins/cpptools/cppsemanticinfoupdater.cpp
@@ -52,15 +52,15 @@ public:
     class FuturizedTopLevelDeclarationProcessor: public TopLevelDeclarationProcessor
     {
     public:
-        FuturizedTopLevelDeclarationProcessor(QFutureInterface<void> &future): m_future(future) {}
-        bool processDeclaration(DeclarationAST *) { return !isCanceled(); }
+        explicit FuturizedTopLevelDeclarationProcessor(QFutureInterface<void> &future): m_future(future) {}
+        bool processDeclaration(DeclarationAST *) override { return !isCanceled(); }
         bool isCanceled() { return m_future.isCanceled(); }
     private:
         QFutureInterface<void> m_future;
     };
 
 public:
-    SemanticInfoUpdaterPrivate(SemanticInfoUpdater *q);
+    explicit SemanticInfoUpdaterPrivate(SemanticInfoUpdater *q);
     ~SemanticInfoUpdaterPrivate();
 
     SemanticInfo semanticInfo() const;
@@ -72,7 +72,7 @@ public:
 
     bool reuseCurrentSemanticInfo(const SemanticInfo::Source &source, bool emitSignalWhenFinished);
 
-    void update_helper(QFutureInterface<void> &future, const SemanticInfo::Source source);
+    void update_helper(QFutureInterface<void> &future, const SemanticInfo::Source &source);
 
 public:
     SemanticInfoUpdater *q;
@@ -159,7 +159,7 @@ bool SemanticInfoUpdaterPrivate::reuseCurrentSemanticInfo(const SemanticInfo::So
 }
 
 void SemanticInfoUpdaterPrivate::update_helper(QFutureInterface<void> &future,
-                                               const SemanticInfo::Source source)
+                                               const SemanticInfo::Source &source)
 {
     FuturizedTopLevelDeclarationProcessor processor(future);
     update(source, true, &processor);
@@ -187,10 +187,10 @@ SemanticInfo SemanticInfoUpdater::update(const SemanticInfo::Source &source)
         return semanticInfo();
     }
 
-    return d->update(source, emitSignalWhenFinished, 0);
+    return d->update(source, emitSignalWhenFinished, nullptr);
 }
 
-void SemanticInfoUpdater::updateDetached(const SemanticInfo::Source source)
+void SemanticInfoUpdater::updateDetached(const SemanticInfo::Source &source)
 {
     qCDebug(log) << "updateDetached() - asynchronous";
     d->m_future.cancel();
diff --git a/src/plugins/cpptools/cppsemanticinfoupdater.h b/src/plugins/cpptools/cppsemanticinfoupdater.h
index 2f9101f3e0..f967cc94e0 100644
--- a/src/plugins/cpptools/cppsemanticinfoupdater.h
+++ b/src/plugins/cpptools/cppsemanticinfoupdater.h
@@ -45,10 +45,10 @@ public:
     SemanticInfo semanticInfo() const;
 
     SemanticInfo update(const SemanticInfo::Source &source);
-    void updateDetached(const SemanticInfo::Source source);
+    void updateDetached(const SemanticInfo::Source &source);
 
 signals:
-    void updated(CppTools::SemanticInfo semanticInfo);
+    void updated(const CppTools::SemanticInfo &semanticInfo);
 
 private:
     QScopedPointer<SemanticInfoUpdaterPrivate> d;
diff --git a/src/plugins/cpptools/cppsourceprocessor.cpp b/src/plugins/cpptools/cppsourceprocessor.cpp
index 2259b01f78..35a0ccf529 100644
--- a/src/plugins/cpptools/cppsourceprocessor.cpp
+++ b/src/plugins/cpptools/cppsourceprocessor.cpp
@@ -56,7 +56,7 @@ using namespace CPlusPlus;
 using namespace CppTools;
 using namespace CppTools::Internal;
 
-typedef Document::DiagnosticMessage Message;
+using Message = Document::DiagnosticMessage;
 
 static Q_LOGGING_CATEGORY(log, "qtc.cpptools.sourceprocessor", QtWarningMsg)
 
@@ -119,8 +119,7 @@ CppSourceProcessor::CppSourceProcessor(const Snapshot &snapshot, DocumentCallbac
     m_preprocess.setKeepComments(true);
 }
 
-CppSourceProcessor::~CppSourceProcessor()
-{ }
+CppSourceProcessor::~CppSourceProcessor() = default;
 
 void CppSourceProcessor::setCancelChecker(const CppSourceProcessor::CancelChecker &cancelChecker)
 {
@@ -135,10 +134,8 @@ void CppSourceProcessor::setHeaderPaths(const ProjectExplorer::HeaderPaths &head
     using ProjectExplorer::HeaderPathType;
     m_headerPaths.clear();
 
-    for (int i = 0, ei = headerPaths.size(); i < ei; ++i) {
-        const ProjectExplorer::HeaderPath &path = headerPaths.at(i);
-
-        if (path.type == HeaderPathType::Framework )
+    for (const auto &path : headerPaths) {
+         if (path.type == HeaderPathType::Framework )
             addFrameworkPath(path);
         else
             m_headerPaths.append({cleanPath(path.path), path.type});
diff --git a/src/plugins/cpptools/cppsourceprocessor.h b/src/plugins/cpptools/cppsourceprocessor.h
index b60e3c482a..de6ea7928a 100644
--- a/src/plugins/cpptools/cppsourceprocessor.h
+++ b/src/plugins/cpptools/cppsourceprocessor.h
@@ -51,13 +51,13 @@ class CppSourceProcessor: public CPlusPlus::Client
     Q_DISABLE_COPY(CppSourceProcessor)
 
 public:
-    typedef std::function<void (const CPlusPlus::Document::Ptr &)> DocumentCallback;
+    using DocumentCallback = std::function<void (const CPlusPlus::Document::Ptr &)>;
 
 public:
     static QString cleanPath(const QString &path);
 
     CppSourceProcessor(const CPlusPlus::Snapshot &snapshot, DocumentCallback documentFinished);
-    ~CppSourceProcessor();
+    ~CppSourceProcessor() override;
 
     using CancelChecker = std::function<bool()>;
     void setCancelChecker(const CancelChecker &cancelChecker);
diff --git a/src/plugins/cpptools/cppsourceprocessor_test.cpp b/src/plugins/cpptools/cppsourceprocessor_test.cpp
index d0b9489593..009264cc3c 100644
--- a/src/plugins/cpptools/cppsourceprocessor_test.cpp
+++ b/src/plugins/cpptools/cppsourceprocessor_test.cpp
@@ -49,7 +49,7 @@ using namespace CppTools::Tests;
 using namespace CppTools::Internal;
 using ProjectExplorer::HeaderPathType;
 
-typedef Document::Include Include;
+using Include = Document::Include;
 
 class SourcePreprocessor
 {
@@ -60,7 +60,7 @@ public:
         cleanUp();
     }
 
-    Document::Ptr run(const QString &filePath)
+    Document::Ptr run(const QString &filePath) const
     {
         QScopedPointer<CppSourceProcessor> sourceProcessor(
                     CppModelManager::createSourceProcessor());
diff --git a/src/plugins/cpptools/cpptoolsbridgeqtcreatorimplementation.cpp b/src/plugins/cpptools/cpptoolsbridgeqtcreatorimplementation.cpp
index e0b6b9fdab..c8acdb9918 100644
--- a/src/plugins/cpptools/cpptoolsbridgeqtcreatorimplementation.cpp
+++ b/src/plugins/cpptools/cpptoolsbridgeqtcreatorimplementation.cpp
@@ -79,7 +79,7 @@ CppToolsBridgeQtCreatorImplementation::baseEditorDocumentProcessor(const QString
     if (document)
         return document->processor();
 
-    return 0;
+    return nullptr;
 }
 
 void CppToolsBridgeQtCreatorImplementation::finishedRefreshingSourceFiles(
diff --git a/src/plugins/cpptools/cpptoolsjsextension.h b/src/plugins/cpptools/cpptoolsjsextension.h
index f009c6c259..16a4010f78 100644
--- a/src/plugins/cpptools/cpptoolsjsextension.h
+++ b/src/plugins/cpptools/cpptoolsjsextension.h
@@ -40,7 +40,7 @@ class CppToolsJsExtension : public QObject
     Q_OBJECT
 
 public:
-    CppToolsJsExtension(QObject *parent = 0) : QObject(parent) { }
+    explicit CppToolsJsExtension(QObject *parent = nullptr) : QObject(parent) { }
 
     // Generate header guard:
     Q_INVOKABLE QString headerGuard(const QString &in) const;
diff --git a/src/plugins/cpptools/cpptoolsreuse.cpp b/src/plugins/cpptools/cpptoolsreuse.cpp
index c63a3cc293..63d0a0bbc8 100644
--- a/src/plugins/cpptools/cpptoolsreuse.cpp
+++ b/src/plugins/cpptools/cpptoolsreuse.cpp
@@ -213,7 +213,7 @@ QString identifierUnderCursor(QTextCursor *cursor)
 
 const Macro *findCanonicalMacro(const QTextCursor &cursor, Document::Ptr document)
 {
-    QTC_ASSERT(document, return 0);
+    QTC_ASSERT(document, return nullptr);
 
     int line, column;
     Utils::Text::convertPosition(cursor.document(), cursor.position(), &line, &column);
@@ -227,7 +227,7 @@ const Macro *findCanonicalMacro(const QTextCursor &cursor, Document::Ptr documen
         return &use->macro();
     }
 
-    return 0;
+    return nullptr;
 }
 
 QSharedPointer<CppCodeModelSettings> codeModelSettings()
diff --git a/src/plugins/cpptools/cpptoolssettings.cpp b/src/plugins/cpptools/cpptoolssettings.cpp
index eb56c51722..b4978d06de 100644
--- a/src/plugins/cpptools/cpptoolssettings.cpp
+++ b/src/plugins/cpptools/cpptoolssettings.cpp
@@ -55,18 +55,14 @@ namespace Internal {
 class CppToolsSettingsPrivate
 {
 public:
-    CppToolsSettingsPrivate()
-        : m_globalCodeStyle(0)
-    {}
-
     CommentsSettings m_commentsSettings;
-    CppCodeStylePreferences *m_globalCodeStyle;
+    CppCodeStylePreferences *m_globalCodeStyle = nullptr;
 };
 
 } // namespace Internal
 } // namespace CppTools
 
-CppToolsSettings *CppToolsSettings::m_instance = 0;
+CppToolsSettings *CppToolsSettings::m_instance = nullptr;
 
 CppToolsSettings::CppToolsSettings(QObject *parent)
     : QObject(parent)
@@ -86,7 +82,7 @@ CppToolsSettings::CppToolsSettings(QObject *parent)
     TextEditorSettings::registerCodeStyleFactory(factory);
 
     // code style pool
-    CodeStylePool *pool = new CodeStylePool(factory, this);
+    auto pool = new CodeStylePool(factory, this);
     TextEditorSettings::registerCodeStylePool(Constants::CPP_SETTINGS_ID, pool);
 
     // global code style settings
@@ -124,7 +120,7 @@ CppToolsSettings::CppToolsSettings(QObject *parent)
 
     // built-in settings
     // Qt style
-    CppCodeStylePreferences *qtCodeStyle = new CppCodeStylePreferences();
+    auto qtCodeStyle = new CppCodeStylePreferences;
     qtCodeStyle->setId("qt");
     qtCodeStyle->setDisplayName(tr("Qt"));
     qtCodeStyle->setReadOnly(true);
@@ -137,7 +133,7 @@ CppToolsSettings::CppToolsSettings(QObject *parent)
     pool->addCodeStyle(qtCodeStyle);
 
     // GNU style
-    CppCodeStylePreferences *gnuCodeStyle = new CppCodeStylePreferences();
+    auto gnuCodeStyle = new CppCodeStylePreferences;
     gnuCodeStyle->setId("gnu");
     gnuCodeStyle->setDisplayName(tr("GNU"));
     gnuCodeStyle->setReadOnly(true);
@@ -227,7 +223,7 @@ CppToolsSettings::~CppToolsSettings()
 
     delete d;
 
-    m_instance = 0;
+    m_instance = nullptr;
 }
 
 CppToolsSettings *CppToolsSettings::instance()
diff --git a/src/plugins/cpptools/cpptoolstestcase.cpp b/src/plugins/cpptools/cpptoolstestcase.cpp
index 9b05e4f542..f06dcf79a2 100644
--- a/src/plugins/cpptools/cpptoolstestcase.cpp
+++ b/src/plugins/cpptools/cpptoolstestcase.cpp
@@ -120,8 +120,8 @@ bool TestCase::succeededSoFar() const
 
 bool TestCase::openBaseTextEditor(const QString &fileName, TextEditor::BaseTextEditor **editor)
 {
-    typedef TextEditor::BaseTextEditor BTEditor;
-    if (BTEditor *e = qobject_cast<BTEditor *>(Core::EditorManager::openEditor(fileName))) {
+    using BTEditor = TextEditor::BaseTextEditor;
+    if (auto e = qobject_cast<BTEditor *>(Core::EditorManager::openEditor(fileName))) {
         if (editor) {
             *editor = e;
             return true;
diff --git a/src/plugins/cpptools/cpptoolstestcase.h b/src/plugins/cpptools/cpptoolstestcase.h
index 2b1818e827..009a5a9c3e 100644
--- a/src/plugins/cpptools/cpptoolstestcase.h
+++ b/src/plugins/cpptools/cpptoolstestcase.h
@@ -74,7 +74,7 @@ class CPPTOOLS_EXPORT TestCase
     Q_DISABLE_COPY(TestCase)
 
 public:
-    TestCase(bool runGarbageCollector = true);
+    explicit TestCase(bool runGarbageCollector = true);
     ~TestCase();
 
     bool succeededSoFar() const;
@@ -145,7 +145,7 @@ protected:
 class CPPTOOLS_EXPORT TemporaryCopiedDir : public TemporaryDir
 {
 public:
-    TemporaryCopiedDir(const QString &sourceDirPath);
+    explicit TemporaryCopiedDir(const QString &sourceDirPath);
     QString absolutePath(const QByteArray &relativePath) const;
 
 private:
diff --git a/src/plugins/cpptools/cppvirtualfunctionassistprovider.cpp b/src/plugins/cpptools/cppvirtualfunctionassistprovider.cpp
index c07d88639e..6a93ffa464 100644
--- a/src/plugins/cpptools/cppvirtualfunctionassistprovider.cpp
+++ b/src/plugins/cpptools/cppvirtualfunctionassistprovider.cpp
@@ -70,7 +70,7 @@ protected:
     bool eventFilter(QObject *o, QEvent *e) override
     {
         if (e->type() == QEvent::ShortcutOverride && m_sequence.count() == 1) {
-            QKeyEvent *ke = static_cast<QKeyEvent *>(e);
+            auto ke = static_cast<const QKeyEvent*>(e);
             const QKeySequence seq(ke->key());
             if (seq == m_sequence) {
                 activateCurrentProposalItem();
@@ -124,7 +124,7 @@ public:
 
     IAssistProposal *immediateProposal(const AssistInterface *) override
     {
-        QTC_ASSERT(m_params.function, return 0);
+        QTC_ASSERT(m_params.function, return nullptr);
 
         auto *hintItem = new VirtualFunctionProposalItem(Utils::Link());
         hintItem->setText(QCoreApplication::translate("VirtualFunctionsAssistProcessor",
@@ -141,19 +141,19 @@ public:
     {
         delete assistInterface;
 
-        QTC_ASSERT(m_params.function, return 0);
-        QTC_ASSERT(m_params.staticClass, return 0);
-        QTC_ASSERT(!m_params.snapshot.isEmpty(), return 0);
+        QTC_ASSERT(m_params.function, return nullptr);
+        QTC_ASSERT(m_params.staticClass, return nullptr);
+        QTC_ASSERT(!m_params.snapshot.isEmpty(), return nullptr);
 
         Class *functionsClass = m_finder.findMatchingClassDeclaration(m_params.function,
                                                                       m_params.snapshot);
         if (!functionsClass)
-            return 0;
+            return nullptr;
 
         const QList<Function *> overrides = FunctionUtils::overrides(
             m_params.function, functionsClass, m_params.staticClass, m_params.snapshot);
         if (overrides.isEmpty())
-            return 0;
+            return nullptr;
 
         QList<AssistProposalItemInterface *> items;
         foreach (Function *func, overrides)
@@ -190,9 +190,7 @@ private:
     mutable SymbolFinder m_finder;
 };
 
-VirtualFunctionAssistProvider::VirtualFunctionAssistProvider()
-{
-}
+VirtualFunctionAssistProvider::VirtualFunctionAssistProvider() = default;
 
 bool VirtualFunctionAssistProvider::configure(const Parameters &parameters)
 {
diff --git a/src/plugins/cpptools/cppvirtualfunctionproposalitem.h b/src/plugins/cpptools/cppvirtualfunctionproposalitem.h
index 61d06b469c..d3d3d8da5c 100644
--- a/src/plugins/cpptools/cppvirtualfunctionproposalitem.h
+++ b/src/plugins/cpptools/cppvirtualfunctionproposalitem.h
@@ -37,7 +37,7 @@ class CPPTOOLS_EXPORT VirtualFunctionProposalItem final : public TextEditor::Ass
 public:
     VirtualFunctionProposalItem(const Utils::Link &link,
                                 bool openInSplit = true);
-    ~VirtualFunctionProposalItem() noexcept override {}
+    ~VirtualFunctionProposalItem() noexcept override = default;
     void apply(TextEditor::TextDocumentManipulatorInterface &manipulator,
                int basePosition) const override;
     Utils::Link link() const { return m_link; } // Exposed for tests
diff --git a/src/plugins/cpptools/cppworkingcopy.cpp b/src/plugins/cpptools/cppworkingcopy.cpp
index cdd4ad257d..cee6ce2402 100644
--- a/src/plugins/cpptools/cppworkingcopy.cpp
+++ b/src/plugins/cpptools/cppworkingcopy.cpp
@@ -40,8 +40,6 @@
 
 namespace CppTools {
 
-WorkingCopy::WorkingCopy()
-{
-}
+WorkingCopy::WorkingCopy() = default;
 
 } // namespace CppTools
diff --git a/src/plugins/cpptools/cppworkingcopy.h b/src/plugins/cpptools/cppworkingcopy.h
index 6c370d5b68..6c9e74caa8 100644
--- a/src/plugins/cpptools/cppworkingcopy.h
+++ b/src/plugins/cpptools/cppworkingcopy.h
@@ -77,7 +77,7 @@ public:
     { return _elements.size(); }
 
 private:
-    typedef QHash<Utils::FileName, QPair<QByteArray, unsigned> > Table;
+    using Table = QHash<Utils::FileName, QPair<QByteArray, unsigned> >;
     Table _elements;
 };
 
diff --git a/src/plugins/cpptools/doxygengenerator.cpp b/src/plugins/cpptools/doxygengenerator.cpp
index 39e2e25275..4ae67721cf 100644
--- a/src/plugins/cpptools/doxygengenerator.cpp
+++ b/src/plugins/cpptools/doxygengenerator.cpp
@@ -136,8 +136,8 @@ QString DoxygenGenerator::generate(QTextCursor cursor,
 
 QString DoxygenGenerator::generate(QTextCursor cursor, DeclarationAST *decl)
 {
-    SpecifierAST *spec = 0;
-    DeclaratorAST *decltr = 0;
+    SpecifierAST *spec = nullptr;
+    DeclaratorAST *decltr = nullptr;
     if (SimpleDeclarationAST *simpleDecl = decl->asSimpleDeclaration()) {
         if (simpleDecl->declarator_list
                 && simpleDecl->declarator_list->value) {
diff --git a/src/plugins/cpptools/editordocumenthandle.cpp b/src/plugins/cpptools/editordocumenthandle.cpp
index 9d999b4bec..51f3032893 100644
--- a/src/plugins/cpptools/editordocumenthandle.cpp
+++ b/src/plugins/cpptools/editordocumenthandle.cpp
@@ -34,9 +34,7 @@ namespace CppTools {
            C++ editor document.
 */
 
-CppEditorDocumentHandle::~CppEditorDocumentHandle()
-{
-}
+CppEditorDocumentHandle::~CppEditorDocumentHandle() = default;
 
 SendDocumentTracker &CppEditorDocumentHandle::sendTracker()
 {
diff --git a/src/plugins/cpptools/followsymbolinterface.h b/src/plugins/cpptools/followsymbolinterface.h
index bde155c5f3..380e4e39ae 100644
--- a/src/plugins/cpptools/followsymbolinterface.h
+++ b/src/plugins/cpptools/followsymbolinterface.h
@@ -41,7 +41,7 @@ class CPPTOOLS_EXPORT FollowSymbolInterface
 public:
     using Link = Utils::Link;
 
-    virtual ~FollowSymbolInterface() {}
+    virtual ~FollowSymbolInterface() = default;
     virtual void findLink(const CursorInEditor &data,
                           Utils::ProcessLinkCallback &&processLinkCallback,
                           bool resolveTarget,
diff --git a/src/plugins/cpptools/functionutils.cpp b/src/plugins/cpptools/functionutils.cpp
index b8224923a0..fa82fece8a 100644
--- a/src/plugins/cpptools/functionutils.cpp
+++ b/src/plugins/cpptools/functionutils.cpp
@@ -47,7 +47,7 @@ static bool isVirtualFunction_helper(const Function *function,
     enum { Unknown, False, True } res = Unknown;
 
     if (firstVirtual)
-        *firstVirtual = 0;
+        *firstVirtual = nullptr;
 
     if (!function)
         return false;
@@ -170,7 +170,7 @@ enum Virtuality
     Virtual,
     PureVirtual
 };
-typedef QList<Virtuality> VirtualityList;
+using VirtualityList = QList<Virtuality>;
 } // Internal namespace
 } // CppTools namespace
 
@@ -191,7 +191,7 @@ void CppToolsPlugin::test_functionutils_virtualFunctions()
     QCOMPARE(document->diagnosticMessages().size(), 0);
     QVERIFY(document->translationUnit()->ast());
     QList<const Function *> allFunctions;
-    const Function *firstVirtual = 0;
+    const Function *firstVirtual = nullptr;
 
     // Iterate through Function symbols
     Snapshot snapshot;
@@ -236,7 +236,7 @@ void CppToolsPlugin::test_functionutils_virtualFunctions()
 
 void CppToolsPlugin::test_functionutils_virtualFunctions_data()
 {
-    typedef QByteArray _;
+    using _ = QByteArray;
     QTest::addColumn<QByteArray>("source");
     QTest::addColumn<VirtualityList>("virtualityList");
     QTest::addColumn<QList<int> >("firstVirtualList");
diff --git a/src/plugins/cpptools/includeutils.cpp b/src/plugins/cpptools/includeutils.cpp
index 029f6454d1..c57366332c 100644
--- a/src/plugins/cpptools/includeutils.cpp
+++ b/src/plugins/cpptools/includeutils.cpp
@@ -217,7 +217,7 @@ int LineForNewIncludeDirective::operator()(const QString &newIncludeFileName,
     if (m_includes.empty())
         return findInsertLineForVeryFirstInclude(newLinesToPrepend, newLinesToAppend);
 
-    typedef QList<IncludeGroup> IncludeGroups;
+    using IncludeGroups = QList<IncludeGroup>;
 
     const IncludeGroups groupsNewline = IncludeGroup::detectIncludeGroupsByNewLines(m_includes);
     const bool includeAtTop
@@ -241,8 +241,8 @@ int LineForNewIncludeDirective::operator()(const QString &newIncludeFileName,
                 = IncludeGroup::detectIncludeGroupsByIncludeType(bestMixedGroup.includes());
             groupsMatchingIncludeType = getGroupsByIncludeType(groupsIncludeType, newIncludeType);
             // Avoid extra new lines for include groups which are not separated by new lines
-            newLinesToPrepend = 0;
-            newLinesToAppend = 0;
+            newLinesToPrepend = nullptr;
+            newLinesToAppend = nullptr;
         }
     }
 
diff --git a/src/plugins/cpptools/includeutils.h b/src/plugins/cpptools/includeutils.h
index cadbac37b4..310bb251c8 100644
--- a/src/plugins/cpptools/includeutils.h
+++ b/src/plugins/cpptools/includeutils.h
@@ -39,8 +39,8 @@ QT_FORWARD_DECLARE_CLASS(QTextDocument)
 namespace CppTools {
 namespace IncludeUtils {
 
-typedef CPlusPlus::Document::Include Include;
-typedef CPlusPlus::Client::IncludeType IncludeType;
+using Include = CPlusPlus::Document::Include;
+using IncludeType = CPlusPlus::Client::IncludeType;
 
 class CPPTOOLS_EXPORT IncludeGroup
 {
@@ -54,7 +54,7 @@ public:
                                                    CPlusPlus::Client::IncludeType includeType);
 
 public:
-    IncludeGroup(const QList<Include> &includes) : m_includes(includes) {}
+    explicit IncludeGroup(const QList<Include> &includes) : m_includes(includes) {}
 
     QList<Include> includes() const { return m_includes; }
     Include first() const { return m_includes.first(); }
diff --git a/src/plugins/cpptools/indexitem.h b/src/plugins/cpptools/indexitem.h
index 4370bca422..bb57b0c850 100644
--- a/src/plugins/cpptools/indexitem.h
+++ b/src/plugins/cpptools/indexitem.h
@@ -39,7 +39,7 @@ class CPPTOOLS_EXPORT IndexItem
 {
     Q_DISABLE_COPY(IndexItem)
 
-    IndexItem() {}
+    IndexItem() = default;
 
 public:
     enum ItemType {
@@ -52,7 +52,7 @@ public:
     };
 
 public:
-    typedef QSharedPointer<IndexItem> Ptr;
+    using Ptr = QSharedPointer<IndexItem>;
     static Ptr create(const QString &symbolName,
                       const QString &symbolType,
                       const QString &symbolScope,
@@ -94,7 +94,7 @@ public:
         Recurse, /// continues traversal with the children
     };
 
-    typedef std::function<VisitorResult (const IndexItem::Ptr &)> Visitor;
+    using Visitor = std::function<VisitorResult (const IndexItem::Ptr &)>;
 
     VisitorResult visitAllChildren(Visitor callback) const
     {
diff --git a/src/plugins/cpptools/insertionpointlocator.cpp b/src/plugins/cpptools/insertionpointlocator.cpp
index 0fe27dbcc1..b73d672306 100644
--- a/src/plugins/cpptools/insertionpointlocator.cpp
+++ b/src/plugins/cpptools/insertionpointlocator.cpp
@@ -58,17 +58,10 @@ static int ordering(InsertionPointLocator::AccessSpec xsSpec)
 
 struct AccessRange
 {
-    unsigned start;
-    unsigned end;
-    InsertionPointLocator::AccessSpec xsSpec;
-    unsigned colonToken;
-
-    AccessRange()
-        : start(0)
-        , end(0)
-        , xsSpec(InsertionPointLocator::Invalid)
-        , colonToken(0)
-    {}
+    unsigned start = 0;
+    unsigned end = 0;
+    InsertionPointLocator::AccessSpec xsSpec = InsertionPointLocator::Invalid;
+    unsigned colonToken = 0;
 
     AccessRange(unsigned start, unsigned end, InsertionPointLocator::AccessSpec xsSpec, unsigned colonToken)
         : start(start)
@@ -107,7 +100,7 @@ public:
 protected:
     using ASTVisitor::visit;
 
-    bool visit(ClassSpecifierAST *ast)
+    bool visit(ClassSpecifierAST *ast) override
     {
         if (!ast->lbrace_token || !ast->rbrace_token)
             return true;
@@ -358,7 +351,7 @@ class FindMethodDefinitionInsertPoint : protected ASTVisitor
     HighestValue<int, unsigned> _bestToken;
 
 public:
-    FindMethodDefinitionInsertPoint(TranslationUnit *translationUnit)
+    explicit FindMethodDefinitionInsertPoint(TranslationUnit *translationUnit)
         : ASTVisitor(translationUnit)
     {}
 
@@ -388,12 +381,12 @@ public:
     }
 
 protected:
-    bool preVisit(AST *ast)
+    bool preVisit(AST *ast) override
     {
         return ast->asNamespace() || ast->asTranslationUnit() || ast->asLinkageBody();
     }
 
-    bool visit(NamespaceAST *ast)
+    bool visit(NamespaceAST *ast) override
     {
         if (_currentDepth >= _namespaceNames.size())
             return false;
@@ -423,7 +416,7 @@ class FindFunctionDefinition : protected ASTVisitor
     unsigned _line = 0;
     unsigned _column = 0;
 public:
-    FindFunctionDefinition(TranslationUnit *translationUnit)
+    explicit FindFunctionDefinition(TranslationUnit *translationUnit)
         : ASTVisitor(translationUnit)
     {
     }
@@ -438,7 +431,7 @@ public:
     }
 
 protected:
-    bool preVisit(AST *ast)
+    bool preVisit(AST *ast) override
     {
         if (_result)
             return false;
@@ -452,7 +445,7 @@ protected:
         return true;
     }
 
-    bool visit(FunctionDefinitionAST *ast)
+    bool visit(FunctionDefinitionAST *ast) override
     {
         _result = ast;
         return false;
@@ -464,13 +457,13 @@ protected:
 static Declaration *isNonVirtualFunctionDeclaration(Symbol *s)
 {
     if (!s)
-        return 0;
+        return nullptr;
     Declaration *declaration = s->asDeclaration();
     if (!declaration)
-        return 0;
+        return nullptr;
     Function *type = s->type()->asFunctionType();
     if (!type || type->isPureVirtual())
-        return 0;
+        return nullptr;
     return declaration;
 }
 
@@ -497,9 +490,9 @@ static InsertionLocation nextToSurroundingDefinitions(Symbol *declaration,
 
     // scan preceding declarations for a function declaration (and see if it is defined)
     SymbolFinder symbolFinder;
-    Function *definitionFunction = 0;
+    Function *definitionFunction = nullptr;
     QString prefix, suffix;
-    Declaration *surroundingFunctionDecl = 0;
+    Declaration *surroundingFunctionDecl = nullptr;
     for (int i = declIndex - 1; i >= 0; --i) {
         Symbol *s = klass->memberAt(i);
         if (s->isGenerated() || !(surroundingFunctionDecl = isNonVirtualFunctionDeclaration(s)))
@@ -512,7 +505,7 @@ static InsertionLocation nextToSurroundingDefinitions(Symbol *declaration,
                 prefix = QLatin1String("\n\n");
                 break;
             }
-            definitionFunction = 0;
+            definitionFunction = nullptr;
         }
     }
     if (!definitionFunction) {
@@ -530,7 +523,7 @@ static InsertionLocation nextToSurroundingDefinitions(Symbol *declaration,
                     suffix = QLatin1String("\n\n");
                     break;
                 }
-                definitionFunction = 0;
+                definitionFunction = nullptr;
             }
         }
     }
diff --git a/src/plugins/cpptools/insertionpointlocator.h b/src/plugins/cpptools/insertionpointlocator.h
index 434af1f0e7..480d1b592b 100644
--- a/src/plugins/cpptools/insertionpointlocator.h
+++ b/src/plugins/cpptools/insertionpointlocator.h
@@ -87,7 +87,7 @@ public:
     static QString accessSpecToString(InsertionPointLocator::AccessSpec xsSpec);
 
 public:
-    InsertionPointLocator(const CppRefactoringChanges &refactoringChanges);
+    explicit InsertionPointLocator(const CppRefactoringChanges &refactoringChanges);
 
     InsertionLocation methodDeclarationInClass(const QString &fileName,
                                                const CPlusPlus::Class *clazz,
diff --git a/src/plugins/cpptools/modelmanagertesthelper.cpp b/src/plugins/cpptools/modelmanagertesthelper.cpp
index 0df295ba95..83e27fb237 100644
--- a/src/plugins/cpptools/modelmanagertesthelper.cpp
+++ b/src/plugins/cpptools/modelmanagertesthelper.cpp
@@ -85,7 +85,7 @@ void ModelManagerTestHelper::cleanup()
 
 ModelManagerTestHelper::Project *ModelManagerTestHelper::createProject(const QString &name)
 {
-    TestProject *tp = new TestProject(name, this);
+    auto tp = new TestProject(name, this);
     emit projectAdded(tp);
     return tp;
 }
diff --git a/src/plugins/cpptools/modelmanagertesthelper.h b/src/plugins/cpptools/modelmanagertesthelper.h
index 51c947af1d..9fe887006d 100644
--- a/src/plugins/cpptools/modelmanagertesthelper.h
+++ b/src/plugins/cpptools/modelmanagertesthelper.h
@@ -53,7 +53,7 @@ class CPPTOOLS_EXPORT ModelManagerTestHelper: public QObject
     Q_OBJECT
 
 public:
-    typedef ProjectExplorer::Project Project;
+    using Project = ProjectExplorer::Project;
 
     explicit ModelManagerTestHelper(QObject *parent = nullptr,
                                     bool testOnlyForCleanedProjects = true);
@@ -70,8 +70,8 @@ public:
     void waitForFinishedGc();
 
 signals:
-    void aboutToRemoveProject(ProjectExplorer::Project *project);
-    void projectAdded(ProjectExplorer::Project*);
+    void aboutToRemoveProject(Project *project);
+    void projectAdded(Project*);
 
 public slots:
     void sourceFilesRefreshed(const QSet<QString> &files);
diff --git a/src/plugins/cpptools/projectinfo.h b/src/plugins/cpptools/projectinfo.h
index 4cf43d0ff6..c934bda2d5 100644
--- a/src/plugins/cpptools/projectinfo.h
+++ b/src/plugins/cpptools/projectinfo.h
@@ -87,7 +87,7 @@ class CPPTOOLS_EXPORT ProjectInfo
 {
 public:
     ProjectInfo() = default;
-    ProjectInfo(QPointer<ProjectExplorer::Project> project);
+    explicit ProjectInfo(QPointer<ProjectExplorer::Project> project);
 
     bool isValid() const;
 
diff --git a/src/plugins/cpptools/refactoringengineinterface.h b/src/plugins/cpptools/refactoringengineinterface.h
index d47855b686..93f365a24b 100644
--- a/src/plugins/cpptools/refactoringengineinterface.h
+++ b/src/plugins/cpptools/refactoringengineinterface.h
@@ -59,7 +59,7 @@ public:
     using RenameCallback = ClangBackEnd::RefactoringClientInterface::RenameCallback;
     using Link = Utils::Link;
 
-    virtual ~RefactoringEngineInterface() {}
+    virtual ~RefactoringEngineInterface() = default;
 
     virtual void startLocalRenaming(const CursorInEditor &data,
                                     CppTools::ProjectPart *projectPart,
diff --git a/src/plugins/cpptools/searchsymbols.cpp b/src/plugins/cpptools/searchsymbols.cpp
index 9ec44a3ba7..6adb437bf8 100644
--- a/src/plugins/cpptools/searchsymbols.cpp
+++ b/src/plugins/cpptools/searchsymbols.cpp
@@ -37,8 +37,8 @@ using namespace CPlusPlus;
 
 namespace CppTools {
 
-typedef Utils::ScopedSwap<IndexItem::Ptr> ScopedIndexItemPtr;
-typedef Utils::ScopedSwap<QString> ScopedScope;
+using ScopedIndexItemPtr = Utils::ScopedSwap<IndexItem::Ptr>;
+using ScopedScope = Utils::ScopedSwap<QString>;
 
 SearchSymbols::SymbolTypes SearchSymbols::AllTypes =
         SymbolSearcher::Classes
diff --git a/src/plugins/cpptools/semantichighlighter.cpp b/src/plugins/cpptools/semantichighlighter.cpp
index 8d49cea122..5c7c8110ca 100644
--- a/src/plugins/cpptools/semantichighlighter.cpp
+++ b/src/plugins/cpptools/semantichighlighter.cpp
@@ -47,7 +47,6 @@ namespace CppTools {
 SemanticHighlighter::SemanticHighlighter(TextDocument *baseTextDocument)
     : QObject(baseTextDocument)
     , m_baseTextDocument(baseTextDocument)
-    , m_revision(0)
 {
     QTC_CHECK(m_baseTextDocument);
     updateFormatMapFromFontSettings();
@@ -113,7 +112,7 @@ void SemanticHighlighter::onHighlighterFinished()
 
 void SemanticHighlighter::connectWatcher()
 {
-    typedef QFutureWatcher<HighlightingResult> Watcher;
+    using Watcher = QFutureWatcher<HighlightingResult>;
     connect(m_watcher.data(), &Watcher::resultsReadyAt,
             this, &SemanticHighlighter::onHighlighterResultAvailable);
     connect(m_watcher.data(), &Watcher::finished,
@@ -122,7 +121,7 @@ void SemanticHighlighter::connectWatcher()
 
 void SemanticHighlighter::disconnectWatcher()
 {
-    typedef QFutureWatcher<HighlightingResult> Watcher;
+    using Watcher = QFutureWatcher<HighlightingResult>;
     disconnect(m_watcher.data(), &Watcher::resultsReadyAt,
                this, &SemanticHighlighter::onHighlighterResultAvailable);
     disconnect(m_watcher.data(), &Watcher::finished,
diff --git a/src/plugins/cpptools/semantichighlighter.h b/src/plugins/cpptools/semantichighlighter.h
index 3824d244bd..5b42982cb6 100644
--- a/src/plugins/cpptools/semantichighlighter.h
+++ b/src/plugins/cpptools/semantichighlighter.h
@@ -61,7 +61,7 @@ public:
         VirtualFunctionDeclarationUse,
     };
 
-    typedef std::function<QFuture<TextEditor::HighlightingResult> ()> HighlightingRunner;
+    using HighlightingRunner = std::function<QFuture<TextEditor::HighlightingResult> ()>;
 
 public:
     explicit SemanticHighlighter(TextEditor::TextDocument *baseTextDocument);
@@ -84,7 +84,7 @@ private:
 private:
     TextEditor::TextDocument *m_baseTextDocument;
 
-    unsigned m_revision;
+    unsigned m_revision = 0;
     QScopedPointer<QFutureWatcher<TextEditor::HighlightingResult>> m_watcher;
     QHash<int, QTextCharFormat> m_formatMap;
 
diff --git a/src/plugins/cpptools/stringtable.cpp b/src/plugins/cpptools/stringtable.cpp
index 25be4d035c..1be6b6ce25 100644
--- a/src/plugins/cpptools/stringtable.cpp
+++ b/src/plugins/cpptools/stringtable.cpp
@@ -57,7 +57,7 @@ public:
         StringTablePrivate &m_stringTable;
 
     public:
-        GCRunner(StringTablePrivate &stringTable): m_stringTable(stringTable) {}
+        explicit GCRunner(StringTablePrivate &stringTable): m_stringTable(stringTable) {}
         void run() override { m_stringTable.GC(); }
     } m_gcRunner;
 
diff --git a/src/plugins/cpptools/symbolfinder.cpp b/src/plugins/cpptools/symbolfinder.cpp
index 763fe42dcd..1e7cf37c58 100644
--- a/src/plugins/cpptools/symbolfinder.cpp
+++ b/src/plugins/cpptools/symbolfinder.cpp
@@ -47,14 +47,13 @@ namespace {
 
 class FindMatchingDefinition: public SymbolVisitor
 {
-    Symbol *_declaration;
-    const OperatorNameId *_oper;
+    Symbol *_declaration = nullptr;
+    const OperatorNameId *_oper = nullptr;
     QList<Function *> _result;
 
 public:
-    FindMatchingDefinition(Symbol *declaration)
+    explicit FindMatchingDefinition(Symbol *declaration)
         : _declaration(declaration)
-        , _oper(0)
     {
         if (_declaration->name())
             _oper = _declaration->name()->asOperatorNameId();
@@ -89,8 +88,7 @@ public:
 
 static const int kMaxCacheSize = 10;
 
-SymbolFinder::SymbolFinder()
-{}
+SymbolFinder::SymbolFinder() = default;
 
 // strict means the returned symbol has to match exactly,
 // including argument count, argument types, constness and volatileness.
@@ -99,21 +97,21 @@ Function *SymbolFinder::findMatchingDefinition(Symbol *declaration,
                                              bool strict)
 {
     if (!declaration)
-        return 0;
+        return nullptr;
 
     QString declFile = QString::fromUtf8(declaration->fileName(), declaration->fileNameLength());
 
     Document::Ptr thisDocument = snapshot.document(declFile);
     if (!thisDocument) {
         qWarning() << "undefined document:" << declaration->fileName();
-        return 0;
+        return nullptr;
     }
 
     Function *declarationTy = declaration->type()->asFunctionType();
     if (!declarationTy) {
         qWarning() << "not a function:" << declaration->fileName()
                    << declaration->line() << declaration->column();
-        return 0;
+        return nullptr;
     }
 
     foreach (const QString &fileName, fileIterationOrder(declFile, snapshot)) {
@@ -169,7 +167,7 @@ Function *SymbolFinder::findMatchingDefinition(Symbol *declaration,
             else if (!strict && viableFunctions.length() == 1)
                 return viableFunctions.first();
 
-            Function *best = 0;
+            Function *best = nullptr;
 
             foreach (Function *fun, viableFunctions) {
                 if (!(fun->unqualifiedName()
@@ -206,13 +204,13 @@ Function *SymbolFinder::findMatchingDefinition(Symbol *declaration,
         }
     }
 
-    return 0;
+    return nullptr;
 }
 
 Class *SymbolFinder::findMatchingClassDeclaration(Symbol *declaration, const Snapshot &snapshot)
 {
     if (!declaration->identifier())
-        return 0;
+        return nullptr;
 
     QString declFile = QString::fromUtf8(declaration->fileName(), declaration->fileNameLength());
 
@@ -239,7 +237,7 @@ Class *SymbolFinder::findMatchingClassDeclaration(Symbol *declaration, const Sna
         }
     }
 
-    return 0;
+    return nullptr;
 }
 
 static void findDeclarationOfSymbol(Symbol *s,
@@ -272,13 +270,13 @@ void SymbolFinder::findMatchingDeclaration(const LookupContext &context,
     Scope *enclosingScope = functionType->enclosingScope();
     while (!(enclosingScope->isNamespace() || enclosingScope->isClass()))
         enclosingScope = enclosingScope->enclosingScope();
-    QTC_ASSERT(enclosingScope != 0, return);
+    QTC_ASSERT(enclosingScope != nullptr, return);
 
     const Name *functionName = functionType->name();
     if (!functionName)
         return;
 
-    ClassOrNamespace *binding = 0;
+    ClassOrNamespace *binding = nullptr;
     const QualifiedNameId *qName = functionName->asQualifiedNameId();
     if (qName) {
         if (qName->base())
diff --git a/src/plugins/cpptools/symbolsearcher_test.cpp b/src/plugins/cpptools/symbolsearcher_test.cpp
index dc71fa1562..624973cbf4 100644
--- a/src/plugins/cpptools/symbolsearcher_test.cpp
+++ b/src/plugins/cpptools/symbolsearcher_test.cpp
@@ -45,12 +45,13 @@ QTC_DECLARE_MYTESTDATADIR("../../../tests/cppsymbolsearcher/")
 
 inline QString _(const QByteArray &ba) { return QString::fromLatin1(ba, ba.size()); }
 
+class ResultData;
+using ResultDataList = QList<ResultData>;
+
 class ResultData
 {
 public:
-    typedef QList<ResultData> ResultDataList;
-
-    ResultData() {}
+    ResultData() = default;
     ResultData(const QString &symbolName, const QString &scope)
         : m_symbolName(symbolName), m_scope(scope) {}
 
@@ -82,8 +83,6 @@ public:
     QString m_scope;
 };
 
-typedef ResultData::ResultDataList ResultDataList;
-
 class SymbolSearcherTestCase : public Tests::TestCase
 {
 public:
@@ -92,8 +91,7 @@ public:
                            CppIndexingSupport *indexingSupportToUse,
                            const SymbolSearcher::Parameters &searchParameters,
                            const ResultDataList &expectedResults)
-        : m_indexingSupportToRestore(0)
-        , m_indexingSupportToUse(indexingSupportToUse)
+        : m_indexingSupportToUse(indexingSupportToUse)
     {
         QVERIFY(succeededSoFar());
 
@@ -119,8 +117,8 @@ public:
     }
 
 private:
-    CppIndexingSupport *m_indexingSupportToRestore;
-    CppIndexingSupport *m_indexingSupportToUse;
+    CppIndexingSupport *m_indexingSupportToRestore = nullptr;
+    CppIndexingSupport *m_indexingSupportToUse = nullptr;
 };
 
 } // anonymous namespace
@@ -166,7 +164,7 @@ void CppToolsPlugin::test_builtinsymbolsearcher_data()
     // Check All Symbol Types
     searchParameters = SymbolSearcher::Parameters();
     searchParameters.text = _("");
-    searchParameters.flags = 0;
+    searchParameters.flags = nullptr;
     searchParameters.types = SearchSymbols::AllTypes;
     searchParameters.scope = SymbolSearcher::SearchGlobal;
     QTest::newRow("BuiltinSymbolSearcher::AllTypes")
@@ -220,7 +218,7 @@ void CppToolsPlugin::test_builtinsymbolsearcher_data()
     // Check Classes
     searchParameters = SymbolSearcher::Parameters();
     searchParameters.text = _("myclass");
-    searchParameters.flags = 0;
+    searchParameters.flags = nullptr;
     searchParameters.types = SymbolSearcher::Classes;
     searchParameters.scope = SymbolSearcher::SearchGlobal;
     QTest::newRow("BuiltinSymbolSearcher::Classes")
@@ -235,7 +233,7 @@ void CppToolsPlugin::test_builtinsymbolsearcher_data()
     // Check Functions
     searchParameters = SymbolSearcher::Parameters();
     searchParameters.text = _("fun");
-    searchParameters.flags = 0;
+    searchParameters.flags = nullptr;
     searchParameters.types = SymbolSearcher::Functions;
     searchParameters.scope = SymbolSearcher::SearchGlobal;
     QTest::newRow("BuiltinSymbolSearcher::Functions")
@@ -260,7 +258,7 @@ void CppToolsPlugin::test_builtinsymbolsearcher_data()
     // Check Enums
     searchParameters = SymbolSearcher::Parameters();
     searchParameters.text = _("enum");
-    searchParameters.flags = 0;
+    searchParameters.flags = nullptr;
     searchParameters.types = SymbolSearcher::Enums;
     searchParameters.scope = SymbolSearcher::SearchGlobal;
     QTest::newRow("BuiltinSymbolSearcher::Enums")
@@ -275,7 +273,7 @@ void CppToolsPlugin::test_builtinsymbolsearcher_data()
     // Check Declarations
     searchParameters = SymbolSearcher::Parameters();
     searchParameters.text = _("myvar");
-    searchParameters.flags = 0;
+    searchParameters.flags = nullptr;
     searchParameters.types = SymbolSearcher::Declarations;
     searchParameters.scope = SymbolSearcher::SearchGlobal;
     QTest::newRow("BuiltinSymbolSearcher::Declarations")
diff --git a/src/plugins/cpptools/symbolsfindfilter.cpp b/src/plugins/cpptools/symbolsfindfilter.cpp
index 58e0ba11d3..1fd758a3fa 100644
--- a/src/plugins/cpptools/symbolsfindfilter.cpp
+++ b/src/plugins/cpptools/symbolsfindfilter.cpp
@@ -84,7 +84,7 @@ bool SymbolsFindFilter::isEnabled() const
 
 void SymbolsFindFilter::cancel()
 {
-    SearchResult *search = qobject_cast<SearchResult *>(sender());
+    auto search = qobject_cast<SearchResult *>(sender());
     QTC_ASSERT(search, return);
     QFutureWatcher<SearchResultItem> *watcher = m_watchers.key(search);
     QTC_ASSERT(watcher, return);
@@ -93,7 +93,7 @@ void SymbolsFindFilter::cancel()
 
 void SymbolsFindFilter::setPaused(bool paused)
 {
-    SearchResult *search = qobject_cast<SearchResult *>(sender());
+    auto search = qobject_cast<SearchResult *>(sender());
     QTC_ASSERT(search, return);
     QFutureWatcher<SearchResultItem> *watcher = m_watchers.key(search);
     QTC_ASSERT(watcher, return);
@@ -132,7 +132,7 @@ void SymbolsFindFilter::startSearch(SearchResult *search)
             projectFileNames += Utils::transform(project->files(ProjectExplorer::Project::AllFiles), &Utils::FileName::toString).toSet();
     }
 
-    QFutureWatcher<SearchResultItem> *watcher = new QFutureWatcher<SearchResultItem>();
+    auto watcher = new QFutureWatcher<SearchResultItem>;
     m_watchers.insert(watcher, search);
     connect(watcher, &QFutureWatcherBase::finished,
             this, &SymbolsFindFilter::finish);
@@ -150,8 +150,7 @@ void SymbolsFindFilter::startSearch(SearchResult *search)
 
 void SymbolsFindFilter::addResults(int begin, int end)
 {
-    QFutureWatcher<SearchResultItem> *watcher =
-            static_cast<QFutureWatcher<SearchResultItem> *>(sender());
+    auto watcher = static_cast<QFutureWatcher<SearchResultItem> *>(sender());
     SearchResult *search = m_watchers.value(watcher);
     if (!search) {
         // search was removed from search history while the search is running
@@ -166,8 +165,7 @@ void SymbolsFindFilter::addResults(int begin, int end)
 
 void SymbolsFindFilter::finish()
 {
-    QFutureWatcher<SearchResultItem> *watcher =
-            static_cast<QFutureWatcher<SearchResultItem> *>(sender());
+    auto watcher = static_cast<QFutureWatcher<SearchResultItem> *>(sender());
     SearchResult *search = m_watchers.value(watcher);
     if (search)
         search->finishSearch(watcher->isCanceled());
@@ -227,7 +225,7 @@ void SymbolsFindFilter::onAllTasksFinished(Id type)
 
 void SymbolsFindFilter::searchAgain()
 {
-    SearchResult *search = qobject_cast<SearchResult *>(sender());
+    auto search = qobject_cast<SearchResult *>(sender());
     QTC_ASSERT(search, return);
     search->restart();
     startSearch(search);
@@ -263,11 +261,11 @@ SymbolsFindFilterConfigWidget::SymbolsFindFilterConfigWidget(SymbolsFindFilter *
     connect(m_filter, &SymbolsFindFilter::symbolsToSearchChanged,
             this, &SymbolsFindFilterConfigWidget::getState);
 
-    QGridLayout *layout = new QGridLayout(this);
+    auto layout = new QGridLayout(this);
     setLayout(layout);
     layout->setMargin(0);
 
-    QLabel *typeLabel = new QLabel(tr("Types:"));
+    auto typeLabel = new QLabel(tr("Types:"));
     layout->addWidget(typeLabel, 0, 0);
 
     m_typeClasses = new QCheckBox(tr("Classes"));
diff --git a/src/plugins/cpptools/symbolsfindfilter.h b/src/plugins/cpptools/symbolsfindfilter.h
index b4e72b2a32..e93ad48050 100644
--- a/src/plugins/cpptools/symbolsfindfilter.h
+++ b/src/plugins/cpptools/symbolsfindfilter.h
@@ -48,20 +48,20 @@ class SymbolsFindFilter : public Core::IFindFilter
     Q_OBJECT
 
 public:
-    typedef SymbolSearcher::SearchScope SearchScope;
+    using SearchScope = SymbolSearcher::SearchScope;
 
 public:
     explicit SymbolsFindFilter(CppModelManager *manager);
 
-    QString id() const;
-    QString displayName() const;
-    bool isEnabled() const;
+    QString id() const override;
+    QString displayName() const override;
+    bool isEnabled() const override;
 
-    void findAll(const QString &txt, Core::FindFlags findFlags);
+    void findAll(const QString &txt, Core::FindFlags findFlags) override;
 
-    QWidget *createConfigWidget();
-    void writeSettings(QSettings *settings);
-    void readSettings(QSettings *settings);
+    QWidget *createConfigWidget() override;
+    void writeSettings(QSettings *settings) override;
+    void readSettings(QSettings *settings) override;
 
     void setSymbolsToSearch(const SearchSymbols::SymbolTypes &types) { m_symbolsToSearch = types; }
     SearchSymbols::SymbolTypes symbolsToSearch() const { return m_symbolsToSearch; }
@@ -99,7 +99,7 @@ class SymbolsFindFilterConfigWidget : public QWidget
 {
     Q_OBJECT
 public:
-    SymbolsFindFilterConfigWidget(SymbolsFindFilter *filter);
+    explicit SymbolsFindFilterConfigWidget(SymbolsFindFilter *filter);
 
 private:
     void setState() const;
diff --git a/src/plugins/cpptools/typehierarchybuilder.cpp b/src/plugins/cpptools/typehierarchybuilder.cpp
index b44517e14c..e54b546068 100644
--- a/src/plugins/cpptools/typehierarchybuilder.cpp
+++ b/src/plugins/cpptools/typehierarchybuilder.cpp
@@ -42,7 +42,7 @@ QString unqualifyName(const QString &qualifiedName)
 class DerivedHierarchyVisitor : public CPlusPlus::SymbolVisitor
 {
 public:
-    DerivedHierarchyVisitor(const QString &qualifiedName)
+    explicit DerivedHierarchyVisitor(const QString &qualifiedName)
         : _qualifiedName(qualifiedName)
         , _unqualifiedName(unqualifyName(qualifiedName))
     {}
@@ -119,8 +119,7 @@ bool DerivedHierarchyVisitor::visit(CPlusPlus::Class *symbol)
 
 } // namespace
 
-TypeHierarchy::TypeHierarchy() : _symbol(0)
-{}
+TypeHierarchy::TypeHierarchy() = default;
 
 TypeHierarchy::TypeHierarchy(CPlusPlus::Symbol *symbol) : _symbol(symbol)
 {}
diff --git a/src/plugins/cpptools/typehierarchybuilder.h b/src/plugins/cpptools/typehierarchybuilder.h
index 055794687e..fc1a628515 100644
--- a/src/plugins/cpptools/typehierarchybuilder.h
+++ b/src/plugins/cpptools/typehierarchybuilder.h
@@ -43,7 +43,7 @@ class CPPTOOLS_EXPORT TypeHierarchy
 
 public:
     TypeHierarchy();
-    TypeHierarchy(CPlusPlus::Symbol *symbol);
+    explicit TypeHierarchy(CPlusPlus::Symbol *symbol);
 
     CPlusPlus::Symbol *symbol() const;
     const QList<TypeHierarchy> &hierarchy() const;
@@ -52,7 +52,7 @@ public:
     { return _symbol == other._symbol; }
 
 private:
-    CPlusPlus::Symbol *_symbol;
+    CPlusPlus::Symbol *_symbol = nullptr;
     QList<TypeHierarchy> _hierarchy;
 };
 
diff --git a/src/plugins/cpptools/typehierarchybuilder_test.cpp b/src/plugins/cpptools/typehierarchybuilder_test.cpp
index 4bba86ec67..0a4ac54568 100644
--- a/src/plugins/cpptools/typehierarchybuilder_test.cpp
+++ b/src/plugins/cpptools/typehierarchybuilder_test.cpp
@@ -40,8 +40,9 @@
 using namespace CPlusPlus;
 using namespace CppTools;
 using namespace CppTools::Internal;
+using Tests::TestDocument;
 
-Q_DECLARE_METATYPE(QList<Tests::TestDocument>)
+Q_DECLARE_METATYPE(QList<TestDocument>)
 
 namespace {
 
@@ -64,7 +65,7 @@ QString toString(const TypeHierarchy &hierarchy, int indent = 0)
 class FindFirstClassInDocument: private SymbolVisitor
 {
 public:
-    FindFirstClassInDocument() : m_clazz(0) {}
+    FindFirstClassInDocument() = default;
 
     Class *operator()(const Document::Ptr &document)
     {
@@ -73,7 +74,7 @@ public:
     }
 
 private:
-    bool preVisit(Symbol *symbol)
+    bool preVisit(Symbol *symbol) override
     {
         if (m_clazz)
             return false;
@@ -87,13 +88,13 @@ private:
     }
 
 private:
-    Class *m_clazz;
+    Class *m_clazz = nullptr;
 };
 
 class TypeHierarchyBuilderTestCase : public Tests::TestCase
 {
 public:
-    TypeHierarchyBuilderTestCase(const QList<Tests::TestDocument> &documents,
+    TypeHierarchyBuilderTestCase(const QList<TestDocument> &documents,
                                  const QString &expectedHierarchy)
     {
         QVERIFY(succeededSoFar());
@@ -101,14 +102,14 @@ public:
         Tests::TemporaryDir temporaryDir;
         QVERIFY(temporaryDir.isValid());
 
-        QList<Tests::TestDocument> documents_ = documents;
+        QList<TestDocument> documents_ = documents;
 
         // Write files
         QSet<QString> filePaths;
-        for (int i = 0, size = documents_.size(); i < size; ++i) {
-            documents_[i].setBaseDirectory(temporaryDir.path());
-            QVERIFY(documents_[i].writeToDisk());
-            filePaths << documents_[i].filePath();
+        for (auto &document : documents_) {
+            document.setBaseDirectory(temporaryDir.path());
+            QVERIFY(document.writeToDisk());
+            filePaths << document.filePath();
         }
 
         // Parse files
@@ -137,11 +138,9 @@ public:
 
 void CppToolsPlugin::test_typehierarchy_data()
 {
-    QTest::addColumn<QList<Tests::TestDocument> >("documents");
+    QTest::addColumn<QList<TestDocument> >("documents");
     QTest::addColumn<QString>("expectedHierarchy");
 
-    typedef Tests::TestDocument TestDocument;
-
     QTest::newRow("basic-single-document")
         << (QList<TestDocument>()
             << TestDocument("a.h",
@@ -184,7 +183,7 @@ void CppToolsPlugin::test_typehierarchy_data()
 
 void CppToolsPlugin::test_typehierarchy()
 {
-    QFETCH(QList<Tests::TestDocument>, documents);
+    QFETCH(QList<TestDocument>, documents);
     QFETCH(QString, expectedHierarchy);
 
     TypeHierarchyBuilderTestCase(documents, expectedHierarchy);
diff --git a/src/plugins/cpptools/usages.h b/src/plugins/cpptools/usages.h
index 60d29ddbcd..1e0f502c5e 100644
--- a/src/plugins/cpptools/usages.h
+++ b/src/plugins/cpptools/usages.h
@@ -37,7 +37,7 @@ namespace CppTools {
 class Usage
 {
 public:
-    Usage() {}
+    Usage() = default;
     Usage(Utils::SmallStringView path, int line, int column)
         : path(QString::fromUtf8(path.data(), int(path.size()))),
           line(line),