CppEditor: Make a few CppModelManager functions static

... to simplify code using it. Change-Id: Ib2bfbb5a17a1d48088a9cf4973d4c3f006cd34e4 Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>
author: hjk <hjk@qt.io> 2023-07-12 09:47:29 +0200
committer: hjk <hjk@qt.io> 2023-07-12 13:08:09 +0000
commit: 0b83f110f4ca1a620e8faf2db423886aab255602 (patch)
tree: 278ae53b2dcf4ec2441a386626581e00e2a0b06e /src/plugins
parent: 8f82e76ba1c4c3c05aa9e14c2c7937809ec775d2 (diff)
80 files changed, 516 insertions, 630 deletions
diff --git a/src/plugins/autotest/autotestplugin.cpp b/src/plugins/autotest/autotestplugin.cpp
index 1211b7f5e48..6e12778ded2 100644
--- a/src/plugins/autotest/autotestplugin.cpp
+++ b/src/plugins/autotest/autotestplugin.cpp
@@ -392,7 +392,7 @@ void AutotestPluginPrivate::onRunUnderCursorTriggered(TestRunMode mode)
     const int line = currentEditor->currentLine();
     const FilePath filePath = currentEditor->textDocument()->filePath();
 
-    const CPlusPlus::Snapshot snapshot = CppEditor::CppModelManager::instance()->snapshot();
+    const CPlusPlus::Snapshot snapshot = CppEditor::CppModelManager::snapshot();
     const CPlusPlus::Document::Ptr doc = snapshot.document(filePath);
     if (doc.isNull()) // not part of C++ snapshot
         return;
diff --git a/src/plugins/autotest/boost/boosttestparser.cpp b/src/plugins/autotest/boost/boosttestparser.cpp
index 8c701942ada..47b190ecffe 100644
--- a/src/plugins/autotest/boost/boosttestparser.cpp
+++ b/src/plugins/autotest/boost/boosttestparser.cpp
@@ -104,9 +104,8 @@ bool BoostTestParser::processDocument(QPromise<TestParseResultPtr> &promise,
     if (doc.isNull() || !includesBoostTest(doc, m_cppSnapshot) || !hasBoostTestMacros(doc))
         return false;
 
-    const CppEditor::CppModelManager *modelManager = CppEditor::CppModelManager::instance();
     const QList<CppEditor::ProjectPart::ConstPtr> projectParts
-            = modelManager->projectPart(fileName);
+            = CppEditor::CppModelManager::projectPart(fileName);
     if (projectParts.isEmpty()) // happens if shutting down while parsing
         return false;
     const CppEditor::ProjectPart::ConstPtr projectPart = projectParts.first();
diff --git a/src/plugins/autotest/boost/boosttesttreeitem.cpp b/src/plugins/autotest/boost/boosttesttreeitem.cpp
index 957ff73021a..d1fcdcdedd9 100644
--- a/src/plugins/autotest/boost/boosttesttreeitem.cpp
+++ b/src/plugins/autotest/boost/boosttesttreeitem.cpp
@@ -178,10 +178,9 @@ QList<ITestConfiguration *> BoostTestTreeItem::getAllTestConfigurations() const
                 ++funcChildren;
         });
         if (funcChildren) {
-            const auto cppMM = CppEditor::CppModelManager::instance();
-            QTC_ASSERT(cppMM, return);
             testsPerProjectfile[item->proFile()].testCases += funcChildren;
-            testsPerProjectfile[item->proFile()].internalTargets.unite(cppMM->internalTargets(item->filePath()));
+            testsPerProjectfile[item->proFile()].internalTargets.unite(
+                CppEditor::CppModelManager::internalTargets(item->filePath()));
         }
     });
 
@@ -219,8 +218,6 @@ QList<ITestConfiguration *> BoostTestTreeItem::getTestConfigurations(
         if (!item->enabled()) // ignore child tests known to be disabled when using run selected
             return;
         if (predicate(item)) {
-            const auto cppMM = CppEditor::CppModelManager::instance();
-            QTC_ASSERT(cppMM, return);
             QString tcName = item->name();
             if (item->state().testFlag(BoostTestTreeItem::Templated))
                 tcName.append("<*");
@@ -229,7 +226,8 @@ QList<ITestConfiguration *> BoostTestTreeItem::getTestConfigurations(
             tcName = handleSpecialFunctionNames(tcName);
             testCasesForProjectFile[item->proFile()].testCases.append(
                         item->prependWithParentsSuitePaths(tcName));
-            testCasesForProjectFile[item->proFile()].internalTargets.unite(cppMM->internalTargets(item->filePath()));
+            testCasesForProjectFile[item->proFile()].internalTargets.unite(
+                CppEditor::CppModelManager::internalTargets(item->filePath()));
         }
     });
 
@@ -265,8 +263,6 @@ ITestConfiguration *BoostTestTreeItem::testConfiguration() const
 {
     ProjectExplorer::Project *project = ProjectExplorer::ProjectManager::startupProject();
     QTC_ASSERT(project, return nullptr);
-    const auto cppMM = CppEditor::CppModelManager::instance();
-    QTC_ASSERT(cppMM, return nullptr);
 
     const Type itemType = type();
     if (itemType == TestSuite || itemType == TestCase) {
@@ -300,7 +296,7 @@ ITestConfiguration *BoostTestTreeItem::testConfiguration() const
         config->setProjectFile(proFile());
         config->setProject(project);
         config->setTestCases(testCases);
-        config->setInternalTargets(cppMM->internalTargets(filePath()));
+        config->setInternalTargets(CppEditor::CppModelManager::internalTargets(filePath()));
         return config;
     }
     return nullptr;
diff --git a/src/plugins/autotest/catch/catchtestparser.cpp b/src/plugins/autotest/catch/catchtestparser.cpp
index 172304eb953..fac35df11d3 100644
--- a/src/plugins/autotest/catch/catchtestparser.cpp
+++ b/src/plugins/autotest/catch/catchtestparser.cpp
@@ -99,7 +99,6 @@ bool CatchTestParser::processDocument(QPromise<TestParseResultPtr> &promise,
     if (doc.isNull() || !includesCatchHeader(doc, m_cppSnapshot))
         return false;
 
-    const CppEditor::CppModelManager *modelManager = CppEditor::CppModelManager::instance();
     const QString &filePath = doc->filePath().toString();
     const QByteArray &fileContent = getFileContent(fileName);
 
@@ -115,7 +114,8 @@ bool CatchTestParser::processDocument(QPromise<TestParseResultPtr> &promise,
     }
 
 
-    const QList<CppEditor::ProjectPart::ConstPtr> projectParts = modelManager->projectPart(fileName);
+    const QList<CppEditor::ProjectPart::ConstPtr> projectParts
+        = CppEditor::CppModelManager::projectPart(fileName);
     if (projectParts.isEmpty()) // happens if shutting down while parsing
         return false;
     FilePath proFile;
diff --git a/src/plugins/autotest/catch/catchtreeitem.cpp b/src/plugins/autotest/catch/catchtreeitem.cpp
index 034c7ab1d04..9f1d7c8e17c 100644
--- a/src/plugins/autotest/catch/catchtreeitem.cpp
+++ b/src/plugins/autotest/catch/catchtreeitem.cpp
@@ -145,8 +145,6 @@ ITestConfiguration *CatchTreeItem::testConfiguration() const
 {
     ProjectExplorer::Project *project = ProjectExplorer::ProjectManager::startupProject();
     QTC_ASSERT(project, return nullptr);
-    const auto cppMM = CppEditor::CppModelManager::instance();
-    QTC_ASSERT(cppMM, return nullptr);
 
     if (type() != TestCase)
         return nullptr;
@@ -157,7 +155,7 @@ ITestConfiguration *CatchTreeItem::testConfiguration() const
     config->setProjectFile(proFile());
     config->setProject(project);
     config->setTestCases(QStringList(testCasesString()));
-    config->setInternalTargets(cppMM->internalTargets(filePath()));
+    config->setInternalTargets(CppEditor::CppModelManager::internalTargets(filePath()));
     return config;
 }
 
@@ -180,8 +178,6 @@ static void collectTestInfo(const TestTreeItem *item,
                             bool ignoreCheckState)
 {
     QTC_ASSERT(item, return);
-    const auto cppMM = CppEditor::CppModelManager::instance();
-    QTC_ASSERT(cppMM, return);
     const int childCount = item->childCount();
     if (item->type() == TestTreeItem::GroupNode) {
         item->forFirstLevelChildItems([&testCasesForProfile, ignoreCheckState](TestTreeItem *it) {
@@ -198,15 +194,16 @@ static void collectTestInfo(const TestTreeItem *item,
             CatchTreeItem *current = static_cast<CatchTreeItem *>(it);
             testCasesForProfile[projectFile].names.append(current->testCasesString());
         });
-        testCasesForProfile[projectFile].internalTargets.unite(cppMM->internalTargets(item->filePath()));
+        testCasesForProfile[projectFile].internalTargets.unite(
+            CppEditor::CppModelManager::internalTargets(item->filePath()));
     } else if (item->checked() == Qt::PartiallyChecked) {
-        item->forFirstLevelChildItems([&testCasesForProfile, cppMM](TestTreeItem *child) {
+        item->forFirstLevelChildItems([&testCasesForProfile](TestTreeItem *child) {
             QTC_ASSERT(child->type() == TestTreeItem::TestCase, return);
             if (child->checked() == Qt::Checked) {
                 CatchTreeItem *current = static_cast<CatchTreeItem *>(child);
                 testCasesForProfile[child->proFile()].names.append(current->testCasesString());
                 testCasesForProfile[child->proFile()].internalTargets.unite(
-                            cppMM->internalTargets(child->filePath()));
+                            CppEditor::CppModelManager::internalTargets(child->filePath()));
             }
 
         });
@@ -222,13 +219,11 @@ static void collectFailedTestInfo(const CatchTreeItem *item,
     item->forAllChildItems([&testCasesForProfile](TestTreeItem *it) {
         QTC_ASSERT(it, return);
         QTC_ASSERT(it->parentItem(), return);
-        const auto cppMM = CppEditor::CppModelManager::instance();
-        QTC_ASSERT(cppMM, return);
         if (it->type() == TestTreeItem::TestCase && it->data(0, FailedRole).toBool()) {
             CatchTreeItem *current = static_cast<CatchTreeItem *>(it);
             testCasesForProfile[it->proFile()].names.append(current->testCasesString());
             testCasesForProfile[it->proFile()].internalTargets.unite(
-                        cppMM->internalTargets(it->filePath()));
+                        CppEditor::CppModelManager::internalTargets(it->filePath()));
         }
     });
 }
@@ -270,8 +265,6 @@ QList<ITestConfiguration *> CatchTreeItem::getFailedTestConfigurations() const
 QList<ITestConfiguration *> CatchTreeItem::getTestConfigurationsForFile(const FilePath &fileName) const
 {
     QList<ITestConfiguration *> result;
-    const auto cppMM = CppEditor::CppModelManager::instance();
-    QTC_ASSERT(cppMM, return result);
 
     ProjectExplorer::Project *project = ProjectExplorer::ProjectManager::startupProject();
     if (!project || type() != Root)
@@ -296,7 +289,8 @@ QList<ITestConfiguration *> CatchTreeItem::getTestConfigurationsForFile(const Fi
         testConfig->setTestCases(testCases);
         testConfig->setProjectFile(item->proFile());
         testConfig->setProject(ProjectExplorer::ProjectManager::startupProject());
-        testConfig->setInternalTargets(cppMM->internalTargets(item->filePath()));
+        testConfig->setInternalTargets(
+            CppEditor::CppModelManager::internalTargets(item->filePath()));
         result << testConfig;
     }
 
diff --git a/src/plugins/autotest/gtest/gtestparser.cpp b/src/plugins/autotest/gtest/gtestparser.cpp
index bb2285bd43a..8fc292a9224 100644
--- a/src/plugins/autotest/gtest/gtestparser.cpp
+++ b/src/plugins/autotest/gtest/gtestparser.cpp
@@ -86,7 +86,6 @@ bool GTestParser::processDocument(QPromise<TestParseResultPtr> &promise,
     }
 
     const FilePath filePath = doc->filePath();
-    const CppEditor::CppModelManager *modelManager = CppEditor::CppModelManager::instance();
     CPlusPlus::Document::Ptr document = m_cppSnapshot.preprocessedDocument(fileContent, fileName);
     document->check();
     CPlusPlus::AST *ast = document->translationUnit()->ast();
@@ -95,7 +94,8 @@ bool GTestParser::processDocument(QPromise<TestParseResultPtr> &promise,
 
     const QMap<GTestCaseSpec, GTestCodeLocationList> result = visitor.gtestFunctions();
     FilePath proFile;
-    const QList<CppEditor::ProjectPart::ConstPtr> &ppList = modelManager->projectPart(filePath);
+    const QList<CppEditor::ProjectPart::ConstPtr> &ppList =
+        CppEditor::CppModelManager::projectPart(filePath);
     if (!ppList.isEmpty())
         proFile = FilePath::fromString(ppList.first()->projectFile);
     else
diff --git a/src/plugins/autotest/gtest/gtesttreeitem.cpp b/src/plugins/autotest/gtest/gtesttreeitem.cpp
index ddeb8b8c4bf..fdcf150f9c0 100644
--- a/src/plugins/autotest/gtest/gtesttreeitem.cpp
+++ b/src/plugins/autotest/gtest/gtesttreeitem.cpp
@@ -504,14 +504,14 @@ QString GTestTreeItem::nameSuffix() const
 QSet<QString> internalTargets(const TestTreeItem &item)
 {
     QSet<QString> result;
-    const auto cppMM = CppEditor::CppModelManager::instance();
-    const auto projectInfo = cppMM->projectInfo(ProjectExplorer::ProjectManager::startupProject());
+    const auto projectInfo = CppEditor::CppModelManager::projectInfo(
+        ProjectExplorer::ProjectManager::startupProject());
     if (!projectInfo)
         return {};
     const FilePath filePath = item.filePath();
     const QVector<CppEditor::ProjectPart::ConstPtr> projectParts = projectInfo->projectParts();
     if (projectParts.isEmpty())
-        return cppMM->dependingInternalTargets(item.filePath());
+        return CppEditor::CppModelManager::dependingInternalTargets(item.filePath());
     for (const CppEditor::ProjectPart::ConstPtr &projectPart : projectParts) {
         if (FilePath::fromString(projectPart->projectFile) == item.proFile()
                 && Utils::anyOf(projectPart->files, [&filePath](const CppEditor::ProjectFile &pf) {
@@ -519,7 +519,7 @@ QSet<QString> internalTargets(const TestTreeItem &item)
         })) {
             result.insert(projectPart->buildSystemTarget);
             if (projectPart->buildTargetType != ProjectExplorer::BuildTargetType::Executable)
-                result.unite(cppMM->dependingInternalTargets(filePath));
+                result.unite(CppEditor::CppModelManager::dependingInternalTargets(filePath));
         }
     }
     return result;
diff --git a/src/plugins/autotest/itestparser.cpp b/src/plugins/autotest/itestparser.cpp
index 79fde2a0bb1..99b760f78bd 100644
--- a/src/plugins/autotest/itestparser.cpp
+++ b/src/plugins/autotest/itestparser.cpp
@@ -28,14 +28,14 @@ void CppParser::init(const QSet<FilePath> &filesToParse, bool fullParse)
 {
     Q_UNUSED(filesToParse)
     Q_UNUSED(fullParse)
-    m_cppSnapshot = CppEditor::CppModelManager::instance()->snapshot();
-    m_workingCopy = CppEditor::CppModelManager::instance()->workingCopy();
+    m_cppSnapshot = CppEditor::CppModelManager::snapshot();
+    m_workingCopy = CppEditor::CppModelManager::workingCopy();
 }
 
 bool CppParser::selectedForBuilding(const FilePath &fileName)
 {
     QList<CppEditor::ProjectPart::ConstPtr> projParts =
-            CppEditor::CppModelManager::instance()->projectPart(fileName);
+            CppEditor::CppModelManager::projectPart(fileName);
 
     return !projParts.isEmpty() && projParts.at(0)->selectedForBuilding;
 }
@@ -62,8 +62,8 @@ bool precompiledHeaderContains(const CPlusPlus::Snapshot &snapshot,
                                const QString &cacheString,
                                const std::function<bool(const FilePath &)> &checker)
 {
-    const CppEditor::CppModelManager *modelManager = CppEditor::CppModelManager::instance();
-    const QList<CppEditor::ProjectPart::ConstPtr> projectParts = modelManager->projectPart(filePath);
+    const QList<CppEditor::ProjectPart::ConstPtr> projectParts
+        = CppEditor::CppModelManager::projectPart(filePath);
     if (projectParts.isEmpty())
         return false;
     const QStringList precompiledHeaders = projectParts.first()->precompiledHeaders;
diff --git a/src/plugins/autotest/qtest/qttestparser.cpp b/src/plugins/autotest/qtest/qttestparser.cpp
index 57c85b08a9e..824f4860a45 100644
--- a/src/plugins/autotest/qtest/qttestparser.cpp
+++ b/src/plugins/autotest/qtest/qttestparser.cpp
@@ -74,7 +74,7 @@ static bool includesQtTest(const CPlusPlus::Document::Ptr &doc, const CPlusPlus:
 static bool qtTestLibDefined(const FilePath &fileName)
 {
     const QList<CppEditor::ProjectPart::ConstPtr> parts =
-            CppEditor::CppModelManager::instance()->projectPart(fileName);
+            CppEditor::CppModelManager::projectPart(fileName);
     if (parts.size() > 0) {
         return Utils::anyOf(parts.at(0)->projectMacros, [](const ProjectExplorer::Macro &macro) {
             return macro.key == "QT_TESTLIB_LIB";
@@ -83,11 +83,10 @@ static bool qtTestLibDefined(const FilePath &fileName)
     return false;
 }
 
-TestCases QtTestParser::testCases(const CppEditor::CppModelManager *modelManager,
-                                  const FilePath &filePath) const
+TestCases QtTestParser::testCases(const FilePath &filePath) const
 {
     const QByteArray &fileContent = getFileContent(filePath);
-    CPlusPlus::Document::Ptr document = modelManager->document(filePath);
+    CPlusPlus::Document::Ptr document = CppEditor::CppModelManager::document(filePath);
     if (document.isNull())
         return {};
 
@@ -305,8 +304,7 @@ bool QtTestParser::processDocument(QPromise<TestParseResultPtr> &promise,
         return false;
     }
 
-    const CppEditor::CppModelManager *modelManager = CppEditor::CppModelManager::instance();
-    TestCases testCaseList(testCases(modelManager, fileName));
+    TestCases testCaseList(testCases(fileName));
     bool reported = false;
     // we might be in a reparse without the original entry point with the QTest::qExec()
     if (testCaseList.isEmpty() && !oldTestCases.empty())
@@ -319,7 +317,7 @@ bool QtTestParser::processDocument(QPromise<TestParseResultPtr> &promise,
                 continue;
 
             QList<CppEditor::ProjectPart::ConstPtr> projectParts
-                    = modelManager->projectPart(fileName);
+                    = CppEditor::CppModelManager::projectPart(fileName);
             if (projectParts.isEmpty()) // happens if shutting down while parsing
                 return false;
 
diff --git a/src/plugins/autotest/qtest/qttestparser.h b/src/plugins/autotest/qtest/qttestparser.h
index abd8b2b0aaa..ece2bc639c5 100644
--- a/src/plugins/autotest/qtest/qttestparser.h
+++ b/src/plugins/autotest/qtest/qttestparser.h
@@ -10,8 +10,6 @@
 
 #include <optional>
 
-namespace CppEditor { class CppModelManager; }
-
 namespace Autotest {
 namespace Internal {
 
@@ -40,8 +38,7 @@ public:
                          const Utils::FilePath &fileName) override;
 
 private:
-    TestCases testCases(const CppEditor::CppModelManager *modelManager,
-                        const Utils::FilePath &fileName) const;
+    TestCases testCases(const Utils::FilePath &fileName) const;
     QHash<QString, QtTestCodeLocationList> checkForDataTags(const Utils::FilePath &fileName) const;
     struct TestCaseData {
         Utils::FilePath fileName;
diff --git a/src/plugins/autotest/qtest/qttesttreeitem.cpp b/src/plugins/autotest/qtest/qttesttreeitem.cpp
index 81f95c17752..b44c79eed37 100644
--- a/src/plugins/autotest/qtest/qttesttreeitem.cpp
+++ b/src/plugins/autotest/qtest/qttesttreeitem.cpp
@@ -120,8 +120,6 @@ ITestConfiguration *QtTestTreeItem::testConfiguration() const
 {
     ProjectExplorer::Project *project = ProjectExplorer::ProjectManager::startupProject();
     QTC_ASSERT(project, return nullptr);
-    const auto cppMM = CppEditor::CppModelManager::instance();
-    QTC_ASSERT(cppMM, return nullptr);
 
     QtTestConfiguration *config = nullptr;
     switch (type()) {
@@ -155,15 +153,13 @@ ITestConfiguration *QtTestTreeItem::testConfiguration() const
         return nullptr;
     }
     if (config)
-        config->setInternalTargets(cppMM->internalTargets(filePath()));
+        config->setInternalTargets(CppEditor::CppModelManager::internalTargets(filePath()));
     return config;
 }
 
 static void fillTestConfigurationsFromCheckState(const TestTreeItem *item,
                                                  QList<ITestConfiguration *> &testConfigurations)
 {
-    const auto cppMM = CppEditor::CppModelManager::instance();
-    QTC_ASSERT(cppMM, return);
     QTC_ASSERT(item, return);
     if (item->type() == TestTreeItem::GroupNode) {
         for (int row = 0, count = item->childCount(); row < count; ++row)
@@ -198,15 +194,14 @@ static void fillTestConfigurationsFromCheckState(const TestTreeItem *item,
         testConfig->setTestCases(testCases);
         testConfig->setProjectFile(item->proFile());
         testConfig->setProject(ProjectExplorer::ProjectManager::startupProject());
-        testConfig->setInternalTargets(cppMM->internalTargets(item->filePath()));
+        testConfig->setInternalTargets(
+            CppEditor::CppModelManager::internalTargets(item->filePath()));
         testConfigurations << testConfig;
     }
 }
 
 static void collectFailedTestInfo(TestTreeItem *item, QList<ITestConfiguration *> &testConfigs)
 {
-    const auto cppMM = CppEditor::CppModelManager::instance();
-    QTC_ASSERT(cppMM, return);
     QTC_ASSERT(item, return);
     if (item->type() == TestTreeItem::GroupNode) {
         for (int row = 0, count = item->childCount(); row < count; ++row)
@@ -232,7 +227,8 @@ static void collectFailedTestInfo(TestTreeItem *item, QList<ITestConfiguration *
     testConfig->setTestCases(testCases);
     testConfig->setProjectFile(item->proFile());
     testConfig->setProject(ProjectExplorer::ProjectManager::startupProject());
-    testConfig->setInternalTargets(cppMM->internalTargets(item->filePath()));
+    testConfig->setInternalTargets(
+        CppEditor::CppModelManager::internalTargets(item->filePath()));
     testConfigs << testConfig;
 }
 
diff --git a/src/plugins/autotest/quick/quicktestparser.cpp b/src/plugins/autotest/quick/quicktestparser.cpp
index 64b98e1aa28..6482f1613f3 100644
--- a/src/plugins/autotest/quick/quicktestparser.cpp
+++ b/src/plugins/autotest/quick/quicktestparser.cpp
@@ -82,9 +82,10 @@ static bool includesQtQuickTest(const CPlusPlus::Document::Ptr &doc,
     return false;
 }
 
-static QString quickTestSrcDir(const CppEditor::CppModelManager *cppMM, const FilePath &fileName)
+static QString quickTestSrcDir(const FilePath &fileName)
 {
-    const QList<CppEditor::ProjectPart::ConstPtr> parts = cppMM->projectPart(fileName);
+    const QList<CppEditor::ProjectPart::ConstPtr> parts =
+        CppEditor::CppModelManager::projectPart(fileName);
     if (parts.size() > 0) {
         const ProjectExplorer::Macros &macros = parts.at(0)->projectMacros;
         auto found = std::find_if(macros.cbegin(), macros.cend(),
@@ -252,17 +253,17 @@ bool QuickTestParser::handleQtQuickTest(QPromise<TestParseResultPtr> &promise,
                                         CPlusPlus::Document::Ptr document,
                                         ITestFramework *framework)
 {
-    const CppEditor::CppModelManager *modelManager = CppEditor::CppModelManager::instance();
     if (quickTestName(document).isEmpty())
         return false;
 
-    QList<CppEditor::ProjectPart::ConstPtr> ppList = modelManager->projectPart(document->filePath());
+    QList<CppEditor::ProjectPart::ConstPtr> ppList =
+        CppEditor::CppModelManager::projectPart(document->filePath());
     if (ppList.isEmpty()) // happens if shutting down while parsing
         return false;
     const FilePath cppFileName = document->filePath();
     const FilePath proFile = FilePath::fromString(ppList.at(0)->projectFile);
     m_mainCppFiles.insert(cppFileName, proFile);
-    const FilePath srcDir = FilePath::fromString(quickTestSrcDir(modelManager, cppFileName));
+    const FilePath srcDir = FilePath::fromString(quickTestSrcDir(cppFileName));
     if (srcDir.isEmpty())
         return false;
 
diff --git a/src/plugins/autotest/quick/quicktesttreeitem.cpp b/src/plugins/autotest/quick/quicktesttreeitem.cpp
index 88f43e15419..5252f8ea27b 100644
--- a/src/plugins/autotest/quick/quicktesttreeitem.cpp
+++ b/src/plugins/autotest/quick/quicktesttreeitem.cpp
@@ -370,8 +370,8 @@ bool QuickTestTreeItem::isGroupable() const
 QSet<QString> internalTargets(const FilePath &proFile)
 {
     QSet<QString> result;
-    const auto cppMM = CppEditor::CppModelManager::instance();
-    const auto projectInfo = cppMM->projectInfo(ProjectExplorer::ProjectManager::startupProject());
+    const auto projectInfo =
+        CppEditor::CppModelManager::projectInfo(ProjectExplorer::ProjectManager::startupProject());
     if (!projectInfo)
         return {};
     for (const CppEditor::ProjectPart::ConstPtr &projectPart : projectInfo->projectParts()) {
diff --git a/src/plugins/autotest/testcodeparser.cpp b/src/plugins/autotest/testcodeparser.cpp
index 2648d63cd03..5dfecdadf15 100644
--- a/src/plugins/autotest/testcodeparser.cpp
+++ b/src/plugins/autotest/testcodeparser.cpp
@@ -337,7 +337,7 @@ void TestCodeParser::scanForTests(const QSet<FilePath> &filePaths,
     qCDebug(LOG) << QDateTime::currentDateTime().toString("hh:mm:ss.zzz") << "StartParsing";
     m_parsingTimer.restart();
     QSet<QString> extensions;
-    const auto cppSnapshot = CppEditor::CppModelManager::instance()->snapshot();
+    const auto cppSnapshot = CppEditor::CppModelManager::snapshot();
 
     for (ITestParser *parser : codeParsers) {
         parser->init(files, isFullParse);
diff --git a/src/plugins/baremetal/debugservers/uvsc/uvproject.cpp b/src/plugins/baremetal/debugservers/uvsc/uvproject.cpp
index faa32fea086..6b3bd5b42ed 100644
--- a/src/plugins/baremetal/debugservers/uvsc/uvproject.cpp
+++ b/src/plugins/baremetal/debugservers/uvsc/uvproject.cpp
@@ -65,7 +65,7 @@ static void extractAllFiles(const DebuggerRunTool *runTool, QStringList &include
                             FilePaths &headers, FilePaths &sources, FilePaths &assemblers)
 {
     const auto project = runTool->runControl()->project();
-    const CppEditor::ProjectInfo::ConstPtr info = CppModelManager::instance()->projectInfo(project);
+    const CppEditor::ProjectInfo::ConstPtr info = CppModelManager::projectInfo(project);
     if (!info)
         return;
     const QVector<ProjectPart::ConstPtr> parts = info->projectParts();
diff --git a/src/plugins/clangcodemodel/clangcodemodelplugin.cpp b/src/plugins/clangcodemodel/clangcodemodelplugin.cpp
index d9830ec8aa3..f178dc2824e 100644
--- a/src/plugins/clangcodemodel/clangcodemodelplugin.cpp
+++ b/src/plugins/clangcodemodel/clangcodemodelplugin.cpp
@@ -53,7 +53,7 @@ void ClangCodeModelPlugin::generateCompilationDB()
     if (!target)
         return;
 
-    const auto projectInfo = CppModelManager::instance()->projectInfo(target->project());
+    const auto projectInfo = CppModelManager::projectInfo(target->project());
     if (!projectInfo)
         return;
     FilePath baseDir = projectInfo->buildRoot();
@@ -78,7 +78,7 @@ ClangCodeModelPlugin::~ClangCodeModelPlugin()
 void ClangCodeModelPlugin::initialize()
 {
     TaskHub::addCategory({Constants::TASK_CATEGORY_DIAGNOSTICS, Tr::tr("Clang Code Model")});
-    CppEditor::CppModelManager::instance()->activateClangCodeModel(
+    CppEditor::CppModelManager::activateClangCodeModel(
         std::make_unique<ClangModelManagerSupport>());
     createCompilationDBAction();
 
@@ -135,8 +135,8 @@ void ClangCodeModelPlugin::createCompilationDBAction()
                                             "No active project.");
             return;
         }
-        const CppEditor::ProjectInfo::ConstPtr projectInfo = CppEditor::CppModelManager::instance()
-                ->projectInfo(project);
+        const CppEditor::ProjectInfo::ConstPtr projectInfo =
+            CppEditor::CppModelManager::projectInfo(project);
         if (!projectInfo || projectInfo->projectParts().isEmpty()) {
             MessageManager::writeDisrupting("Cannot generate compilation database: "
                                             "Project has no C/C++ project parts.");
diff --git a/src/plugins/clangcodemodel/clangdclient.cpp b/src/plugins/clangcodemodel/clangdclient.cpp
index 11d0f47f894..f4ff68f52ee 100644
--- a/src/plugins/clangcodemodel/clangdclient.cpp
+++ b/src/plugins/clangcodemodel/clangdclient.cpp
@@ -407,7 +407,7 @@ ClangdClient::ClangdClient(Project *project, const Utils::FilePath &jsonDbDir, c
         const Utils::FilePath includeDir
                 = CppEditor::ClangdSettings(d->settings).clangdIncludePath();
         CppEditor::CompilerOptionsBuilder optionsBuilder = clangOptionsBuilder(
-                    *CppEditor::CppModelManager::instance()->fallbackProjectPart(),
+                    *CppEditor::CppModelManager::fallbackProjectPart(),
                     warningsConfigForProject(nullptr), includeDir, {});
         const CppEditor::UsePrecompiledHeaders usePch = CppEditor::getPchUsage();
         const QJsonArray projectPartOptions = fullProjectPartOptions(
@@ -755,7 +755,7 @@ bool ClangdClient::fileBelongsToProject(const Utils::FilePath &filePath) const
 RefactoringChangesData *ClangdClient::createRefactoringChangesBackend() const
 {
     return new CppEditor::CppRefactoringChangesData(
-                CppEditor::CppModelManager::instance()->snapshot());
+                CppEditor::CppModelManager::snapshot());
 }
 
 QVersionNumber ClangdClient::versionNumber() const
@@ -875,8 +875,7 @@ void ClangdClient::updateParserConfig(const Utils::FilePath &filePath,
     // TODO: Should we write the editor defines into the json file? It seems strange
     //       that they should affect the index only while the file is open in the editor.
     const auto projectPart = !config.preferredProjectPartId.isEmpty()
-            ? CppEditor::CppModelManager::instance()->projectPartForId(
-                  config.preferredProjectPartId)
+            ? CppEditor::CppModelManager::projectPartForId(config.preferredProjectPartId)
             : projectPartForFile(filePath);
     if (!projectPart)
         return;
diff --git a/src/plugins/clangcodemodel/clangdcompletion.cpp b/src/plugins/clangcodemodel/clangdcompletion.cpp
index 50a78c657d2..08179005bc7 100644
--- a/src/plugins/clangcodemodel/clangdcompletion.cpp
+++ b/src/plugins/clangcodemodel/clangdcompletion.cpp
@@ -609,7 +609,7 @@ QList<AssistProposalItemInterface *> ClangdCompletionAssistProcessor::generateCo
     if (!doc || pos < 0 || !Utils::anyOf(items, criterion))
         return itemGenerator(items);
     const QString content = doc->toPlainText();
-    const bool requiresSignal = CppModelManager::instance()->getSignalSlotType(
+    const bool requiresSignal = CppModelManager::getSignalSlotType(
                 filePath(), content.toUtf8(), pos)
             == SignalSlotType::NewStyleSignal;
     if (requiresSignal)
diff --git a/src/plugins/clangcodemodel/clangmodelmanagersupport.cpp b/src/plugins/clangcodemodel/clangmodelmanagersupport.cpp
index 98e855b4195..e9f37abb4e5 100644
--- a/src/plugins/clangcodemodel/clangmodelmanagersupport.cpp
+++ b/src/plugins/clangcodemodel/clangmodelmanagersupport.cpp
@@ -62,11 +62,6 @@ using namespace Utils;
 
 namespace ClangCodeModel::Internal {
 
-static CppModelManager *cppModelManager()
-{
-    return CppModelManager::instance();
-}
-
 static Project *fallbackProject()
 {
     if (Project * const p = ProjectTree::currentProject())
@@ -202,10 +197,10 @@ ClangModelManagerSupport::ClangModelManagerSupport()
     watchForInternalChanges();
     setupClangdConfigFile();
     checkSystemForClangdSuitability();
-    cppModelManager()->setCurrentDocumentFilter(std::make_unique<ClangdCurrentDocumentFilter>());
-    cppModelManager()->setLocatorFilter(std::make_unique<ClangdAllSymbolsFilter>());
-    cppModelManager()->setClassesFilter(std::make_unique<ClangdClassesFilter>());
-    cppModelManager()->setFunctionsFilter(std::make_unique<ClangdFunctionsFilter>());
+    CppModelManager::setCurrentDocumentFilter(std::make_unique<ClangdCurrentDocumentFilter>());
+    CppModelManager::setLocatorFilter(std::make_unique<ClangdAllSymbolsFilter>());
+    CppModelManager::setClassesFilter(std::make_unique<ClangdClassesFilter>());
+    CppModelManager::setFunctionsFilter(std::make_unique<ClangdFunctionsFilter>());
     // Setup matchers
     LocatorMatcher::addMatcherCreator(MatcherType::AllSymbols, [] {
         return LanguageClient::languageClientMatchers(
@@ -226,7 +221,7 @@ ClangModelManagerSupport::ClangModelManagerSupport()
     connect(editorManager, &EditorManager::currentEditorChanged,
             this, &ClangModelManagerSupport::onCurrentEditorChanged);
 
-    CppModelManager *modelManager = cppModelManager();
+    CppModelManager *modelManager = CppModelManager::instance();
     connect(modelManager, &CppModelManager::abstractEditorSupportContentsUpdated,
             this, &ClangModelManagerSupport::onAbstractEditorSupportContentsUpdated);
     connect(modelManager, &CppModelManager::abstractEditorSupportRemoved,
@@ -382,7 +377,7 @@ void ClangModelManagerSupport::checkUnused(const Link &link, SearchResult *searc
         }
     }
 
-    CppModelManager::instance()->modelManagerSupport(
+    CppModelManager::modelManagerSupport(
                 CppModelManager::Backend::Builtin)->checkUnused(link, search, callback);
 }
 
@@ -409,7 +404,7 @@ void ClangModelManagerSupport::onCurrentEditorChanged(IEditor *editor)
 {
     // Update task hub issues for current CppEditorDocument
     TaskHub::clearTasks(Constants::TASK_CATEGORY_DIAGNOSTICS);
-    if (!editor || !editor->document() || !cppModelManager()->isCppEditor(editor))
+    if (!editor || !editor->document() || !CppModelManager::isCppEditor(editor))
         return;
 
     const FilePath filePath = editor->document()->filePath();
@@ -460,12 +455,12 @@ static bool isProjectDataUpToDate(Project *project, ProjectInfoList projectInfo,
         return false;
     ProjectInfoList newProjectInfo;
     if (project) {
-        if (const ProjectInfo::ConstPtr pi = CppModelManager::instance()->projectInfo(project))
+        if (const ProjectInfo::ConstPtr pi = CppModelManager::projectInfo(project))
             newProjectInfo.append(pi);
         else
             return false;
     } else {
-        newProjectInfo = CppModelManager::instance()->projectInfos();
+        newProjectInfo = CppModelManager::projectInfos();
     }
     if (newProjectInfo.size() != projectInfo.size())
         return false;
@@ -486,8 +481,8 @@ void ClangModelManagerSupport::updateLanguageClient(Project *project)
     ProjectInfoList projectInfo;
     if (sessionModeEnabled()) {
         project = nullptr;
-        projectInfo = CppModelManager::instance()->projectInfos();
-    } else if (const ProjectInfo::ConstPtr pi = CppModelManager::instance()->projectInfo(project)) {
+        projectInfo = CppModelManager::projectInfos();
+    } else if (const ProjectInfo::ConstPtr pi = CppModelManager::projectInfo(project)) {
         projectInfo.append(pi);
     } else {
         return;
@@ -771,7 +766,7 @@ void ClangModelManagerSupport::onEditorOpened(IEditor *editor)
     QTC_ASSERT(document, return);
     auto textDocument = qobject_cast<TextEditor::TextDocument *>(document);
 
-    if (textDocument && cppModelManager()->isCppEditor(editor)) {
+    if (textDocument && CppModelManager::isCppEditor(editor)) {
         connectToWidgetsMarkContextMenuRequested(editor->widget());
 
         Project * project = ProjectManager::projectForFile(document->filePath());
diff --git a/src/plugins/clangtools/clangtool.cpp b/src/plugins/clangtools/clangtool.cpp
index b9e9e7115ed..c89bdc15418 100644
--- a/src/plugins/clangtools/clangtool.cpp
+++ b/src/plugins/clangtools/clangtool.cpp
@@ -695,7 +695,7 @@ Tasking::Group ClangTool::runRecipe(const RunSettings &runSettings,
     }
 
     const ProjectInfo::ConstPtr projectInfoBeforeBuild
-        = CppModelManager::instance()->projectInfo(target->project());
+        = CppModelManager::projectInfo(target->project());
 
     const auto onTreeSetup = [this, storage, runSettings, diagnosticConfig, fileInfos, tempDir,
                               environment, projectInfoBeforeBuild](TaskTree &taskTree) {
@@ -710,7 +710,7 @@ Tasking::Group ClangTool::runRecipe(const RunSettings &runSettings,
         ProjectExplorerPlugin::saveModifiedFiles();
 
         Project *project = m_runControl->project();
-        const ProjectInfo::ConstPtr projectInfo = CppModelManager::instance()->projectInfo(project);
+        const ProjectInfo::ConstPtr projectInfo = CppModelManager::projectInfo(project);
         if (!projectInfo) {
             m_infoBarWidget->setError(InfoBarWidget::Error, failedMessage,
                                       [this] { showOutputPane(); });
@@ -892,7 +892,7 @@ FileInfos ClangTool::collectFileInfos(Project *project, FileSelection fileSelect
         return {};
     }
 
-    const auto projectInfo = CppModelManager::instance()->projectInfo(project);
+    const auto projectInfo = CppModelManager::projectInfo(project);
     QTC_ASSERT(projectInfo, return FileInfos());
 
     const FileInfos allFileInfos = sortedFileInfos(projectInfo->projectParts());
@@ -1024,7 +1024,7 @@ static bool canAnalyzeProject(Project *project)
         const bool projectSupportsLanguage = project->projectLanguages().contains(c)
                                              || project->projectLanguages().contains(cxx);
         return projectSupportsLanguage
-               && CppModelManager::instance()->projectInfo(project)
+               && CppModelManager::projectInfo(project)
                && ToolChainKitAspect::cxxToolChain(target->kit());
     }
     return false;
diff --git a/src/plugins/clangtools/documentclangtoolrunner.cpp b/src/plugins/clangtools/documentclangtoolrunner.cpp
index 28ea234f9ad..5906cbc4e32 100644
--- a/src/plugins/clangtools/documentclangtoolrunner.cpp
+++ b/src/plugins/clangtools/documentclangtoolrunner.cpp
@@ -109,7 +109,7 @@ static VirtualFileSystemOverlay &vfso()
 
 static FileInfo getFileInfo(const FilePath &file, Project *project)
 {
-    const ProjectInfo::ConstPtr projectInfo = CppModelManager::instance()->projectInfo(project);
+    const ProjectInfo::ConstPtr projectInfo = CppModelManager::projectInfo(project);
     if (!projectInfo)
         return {};
 
diff --git a/src/plugins/classview/classviewparser.cpp b/src/plugins/classview/classviewparser.cpp
index b766c0c4425..2906504eb7c 100644
--- a/src/plugins/classview/classviewparser.cpp
+++ b/src/plugins/classview/classviewparser.cpp
@@ -250,7 +250,7 @@ ParserTreeItem::ConstPtr Parser::getCachedOrParseDocumentTree(const CPlusPlus::D
 
 void Parser::updateDocuments(const QSet<FilePath> &documentPaths)
 {
-    updateDocumentsFromSnapshot(documentPaths, CppEditor::CppModelManager::instance()->snapshot());
+    updateDocumentsFromSnapshot(documentPaths, CppEditor::CppModelManager::snapshot());
 }
 
 void Parser::updateDocumentsFromSnapshot(const QSet<FilePath> &documentPaths,
@@ -293,7 +293,7 @@ void Parser::resetData(const QHash<FilePath, QPair<QString, FilePaths>> &project
     d->m_projectCache.clear();
     d->m_documentCache.clear();
 
-    const CPlusPlus::Snapshot &snapshot = CppEditor::CppModelManager::instance()->snapshot();
+    const CPlusPlus::Snapshot &snapshot = CppEditor::CppModelManager::snapshot();
     for (auto it = projects.cbegin(); it != projects.cend(); ++it) {
         const auto projectData = it.value();
         QSet<FilePath> commonFiles;
@@ -313,7 +313,7 @@ void Parser::resetData(const QHash<FilePath, QPair<QString, FilePaths>> &project
 void Parser::addProject(const FilePath &projectPath, const QString &projectName,
                         const FilePaths &filesInProject)
 {
-    const CPlusPlus::Snapshot &snapshot = CppEditor::CppModelManager::instance()->snapshot();
+    const CPlusPlus::Snapshot &snapshot = CppEditor::CppModelManager::snapshot();
     QSet<FilePath> commonFiles;
     for (const auto &fileInProject : filesInProject) {
         CPlusPlus::Document::Ptr doc = snapshot.document(fileInProject);
diff --git a/src/plugins/cppcheck/cppchecktool.cpp b/src/plugins/cppcheck/cppchecktool.cpp
index cd824b3db47..79e5a3e5b6e 100644
--- a/src/plugins/cppcheck/cppchecktool.cpp
+++ b/src/plugins/cppcheck/cppchecktool.cpp
@@ -180,7 +180,7 @@ void CppcheckTool::check(const Utils::FilePaths &files)
         return;
 
     const CppEditor::ProjectInfo::ConstPtr info
-            = CppEditor::CppModelManager::instance()->projectInfo(m_project);
+            = CppEditor::CppModelManager::projectInfo(m_project);
     if (!info)
         return;
     const QVector<CppEditor::ProjectPart::ConstPtr> parts = info->projectParts();
diff --git a/src/plugins/cppcheck/cppchecktrigger.cpp b/src/plugins/cppcheck/cppchecktrigger.cpp
index 8be098df558..c7317a958d0 100644
--- a/src/plugins/cppcheck/cppchecktrigger.cpp
+++ b/src/plugins/cppcheck/cppchecktrigger.cpp
@@ -56,7 +56,7 @@ void CppcheckTrigger::checkEditors(const QList<IEditor *> &editors)
 
     using CppModelManager = CppEditor::CppModelManager;
     const CppEditor::ProjectInfo::ConstPtr info
-            = CppModelManager::instance()->projectInfo(m_currentProject);
+            = CppModelManager::projectInfo(m_currentProject);
     if (!info)
         return;
 
diff --git a/src/plugins/cppeditor/abstracteditorsupport.cpp b/src/plugins/cppeditor/abstracteditorsupport.cpp
index a275ed6b571..ff43c5895aa 100644
--- a/src/plugins/cppeditor/abstracteditorsupport.cpp
+++ b/src/plugins/cppeditor/abstracteditorsupport.cpp
@@ -16,26 +16,26 @@ using namespace Utils;
 
 namespace CppEditor {
 
-AbstractEditorSupport::AbstractEditorSupport(CppModelManager *modelmanager, QObject *parent) :
-    QObject(parent), m_modelmanager(modelmanager), m_revision(1)
+AbstractEditorSupport::AbstractEditorSupport(QObject *parent) :
+    QObject(parent), m_revision(1)
 {
-    modelmanager->addExtraEditorSupport(this);
+    CppModelManager::addExtraEditorSupport(this);
 }
 
 AbstractEditorSupport::~AbstractEditorSupport()
 {
-    m_modelmanager->removeExtraEditorSupport(this);
+    CppModelManager::removeExtraEditorSupport(this);
 }
 
 void AbstractEditorSupport::updateDocument()
 {
     ++m_revision;
-    m_modelmanager->updateSourceFiles({filePath()});
+    CppModelManager::updateSourceFiles({filePath()});
 }
 
 void AbstractEditorSupport::notifyAboutUpdatedContents() const
 {
-    m_modelmanager->emitAbstractEditorSupportContentsUpdated(
+    CppModelManager::emitAbstractEditorSupportContentsUpdated(
                 filePath().toString(), sourceFilePath().toString(), contents());
 }
 
diff --git a/src/plugins/cppeditor/abstracteditorsupport.h b/src/plugins/cppeditor/abstracteditorsupport.h
index 277001e0433..0f8a8d179b0 100644
--- a/src/plugins/cppeditor/abstracteditorsupport.h
+++ b/src/plugins/cppeditor/abstracteditorsupport.h
@@ -13,14 +13,12 @@ namespace ProjectExplorer { class Project; }
 
 namespace CppEditor {
 
-class CppModelManager;
-
 class CPPEDITOR_EXPORT AbstractEditorSupport : public QObject
 {
     Q_OBJECT
 
 public:
-    explicit AbstractEditorSupport(CppModelManager *modelmanager, QObject *parent = nullptr);
+    explicit AbstractEditorSupport(QObject *parent = nullptr);
     ~AbstractEditorSupport() override;
 
     /// \returns the contents, encoded as UTF-8
@@ -38,7 +36,6 @@ public:
     static bool usePragmaOnce(ProjectExplorer::Project *project);
 
 private:
-    CppModelManager *m_modelmanager;
     unsigned m_revision;
 };
 
diff --git a/src/plugins/cppeditor/baseeditordocumentparser.cpp b/src/plugins/cppeditor/baseeditordocumentparser.cpp
index cbfa6f96859..109a478871f 100644
--- a/src/plugins/cppeditor/baseeditordocumentparser.cpp
+++ b/src/plugins/cppeditor/baseeditordocumentparser.cpp
@@ -92,8 +92,7 @@ ProjectPartInfo BaseEditorDocumentParser::projectPartInfo() const
 
 BaseEditorDocumentParser::Ptr BaseEditorDocumentParser::get(const FilePath &filePath)
 {
-    CppModelManager *cmmi = CppModelManager::instance();
-    if (CppEditorDocumentHandle *cppEditorDocument = cmmi->cppEditorDocument(filePath)) {
+    if (CppEditorDocumentHandle *cppEditorDocument = CppModelManager::cppEditorDocument(filePath)) {
         if (BaseEditorDocumentProcessor *processor = cppEditorDocument->processor())
             return processor->parser();
     }
@@ -109,14 +108,14 @@ ProjectPartInfo BaseEditorDocumentParser::determineProjectPart(const QString &fi
 {
     Internal::ProjectPartChooser chooser;
     chooser.setFallbackProjectPart([](){
-        return CppModelManager::instance()->fallbackProjectPart();
+        return CppModelManager::fallbackProjectPart();
     });
     chooser.setProjectPartsForFile([](const QString &filePath) {
-        return CppModelManager::instance()->projectPart(filePath);
+        return CppModelManager::projectPart(filePath);
     });
     chooser.setProjectPartsFromDependenciesForFile([&](const QString &filePath) {
         const auto fileName = Utils::FilePath::fromString(filePath);
-        return CppModelManager::instance()->projectPartFromDependencies(fileName);
+        return CppModelManager::projectPartFromDependencies(fileName);
     });
 
     const ProjectPartInfo chooserResult
diff --git a/src/plugins/cppeditor/baseeditordocumentprocessor.cpp b/src/plugins/cppeditor/baseeditordocumentprocessor.cpp
index c6c51675eb9..f48c5a710be 100644
--- a/src/plugins/cppeditor/baseeditordocumentprocessor.cpp
+++ b/src/plugins/cppeditor/baseeditordocumentprocessor.cpp
@@ -39,7 +39,7 @@ void BaseEditorDocumentProcessor::run(bool projectsUpdated)
             ? Utils::Language::C
             : Utils::Language::Cxx;
 
-    runImpl({CppModelManager::instance()->workingCopy(),
+    runImpl({CppModelManager::workingCopy(),
              ProjectExplorer::ProjectManager::startupProject(),
              languagePreference,
              projectsUpdated});
@@ -72,7 +72,7 @@ void BaseEditorDocumentProcessor::runParser(QPromise<void> &promise,
     }
 
     parser->update(promise, updateParams);
-    CppModelManager::instance()->finishedRefreshingSourceFiles({parser->filePath().toString()});
+    CppModelManager::finishedRefreshingSourceFiles({parser->filePath().toString()});
 
     promise.setProgressValue(1);
 }
diff --git a/src/plugins/cppeditor/builtincursorinfo.cpp b/src/plugins/cppeditor/builtincursorinfo.cpp
index 4545ebe748d..15e1e0f4921 100644
--- a/src/plugins/cppeditor/builtincursorinfo.cpp
+++ b/src/plugins/cppeditor/builtincursorinfo.cpp
@@ -218,8 +218,8 @@ private:
 
         if (Symbol *s = Internal::CanonicalSymbol::canonicalSymbol(
                     m_scope, m_expression, typeOfExpression)) {
-            const QList<int> tokenIndices = CppModelManager::instance()
-                    ->references(s, typeOfExpression.context());
+            const QList<int> tokenIndices =
+                CppModelManager::references(s, typeOfExpression.context());
             result = toRanges(tokenIndices, m_document->translationUnit());
         }
 
diff --git a/src/plugins/cppeditor/builtineditordocumentparser.cpp b/src/plugins/cppeditor/builtineditordocumentparser.cpp
index f6d7d6faf22..7c8444098e0 100644
--- a/src/plugins/cppeditor/builtineditordocumentparser.cpp
+++ b/src/plugins/cppeditor/builtineditordocumentparser.cpp
@@ -59,8 +59,7 @@ void BuiltinEditorDocumentParser::updateImpl(const QPromise<void> &promise,
 
     bool invalidateSnapshot = false, invalidateConfig = false;
 
-    CppModelManager *modelManager = CppModelManager::instance();
-    QByteArray configFile = modelManager->codeModelConfiguration();
+    QByteArray configFile = CppModelManager::codeModelConfiguration();
     ProjectExplorer::HeaderPaths headerPaths;
     FilePaths includedFiles;
     FilePaths precompiledHeaders;
@@ -131,7 +130,7 @@ void BuiltinEditorDocumentParser::updateImpl(const QPromise<void> &promise,
     else
         invalidateSnapshot = true;
 
-    Snapshot globalSnapshot = modelManager->snapshot();
+    Snapshot globalSnapshot = CppModelManager::snapshot();
 
     if (invalidateSnapshot) {
         state.snapshot = Snapshot();
@@ -172,19 +171,19 @@ void BuiltinEditorDocumentParser::updateImpl(const QPromise<void> &promise,
 
         Internal::CppSourceProcessor sourceProcessor(state.snapshot, [&](const Document::Ptr &doc) {
             const bool isInEditor = doc->filePath() == filePath();
-            Document::Ptr otherDoc = modelManager->document(doc->filePath());
+            Document::Ptr otherDoc = CppModelManager::document(doc->filePath());
             unsigned newRev = otherDoc.isNull() ? 1U : otherDoc->revision() + 1;
             if (isInEditor)
                 newRev = qMax(rev + 1, newRev);
             doc->setRevision(newRev);
-            modelManager->emitDocumentUpdated(doc);
+            CppModelManager::emitDocumentUpdated(doc);
             if (releaseSourceAndAST_)
                 doc->releaseSourceAndAST();
         });
         sourceProcessor.setFileSizeLimitInMb(m_fileSizeLimitInMb);
         sourceProcessor.setCancelChecker([&promise] { return promise.isCanceled(); });
 
-        Snapshot globalSnapshot = modelManager->snapshot();
+        Snapshot globalSnapshot = CppModelManager::snapshot();
         globalSnapshot.remove(filePath());
         sourceProcessor.setGlobalSnapshot(globalSnapshot);
         sourceProcessor.setWorkingCopy(workingCopy);
diff --git a/src/plugins/cppeditor/builtineditordocumentprocessor.cpp b/src/plugins/cppeditor/builtineditordocumentprocessor.cpp
index f4df1fcd0cd..cb94e84a67b 100644
--- a/src/plugins/cppeditor/builtineditordocumentprocessor.cpp
+++ b/src/plugins/cppeditor/builtineditordocumentprocessor.cpp
@@ -183,7 +183,7 @@ BuiltinEditorDocumentProcessor::~BuiltinEditorDocumentProcessor()
 void BuiltinEditorDocumentProcessor::runImpl(
         const BaseEditorDocumentParser::UpdateParams &updateParams)
 {
-    m_parserFuture = Utils::asyncRun(CppModelManager::instance()->sharedThreadPool(),
+    m_parserFuture = Utils::asyncRun(CppModelManager::sharedThreadPool(),
                                      runParser, parser(), updateParams);
 }
 
@@ -277,8 +277,7 @@ void BuiltinEditorDocumentProcessor::onParserFinished(CPlusPlus::Document::Ptr d
             continue;
         if (cppEditorDoc->filePath() == document->filePath())
             continue;
-        CPlusPlus::Document::Ptr cppDoc = CppModelManager::instance()->document(
-            cppEditorDoc->filePath());
+        CPlusPlus::Document::Ptr cppDoc = CppModelManager::document(cppEditorDoc->filePath());
         if (!cppDoc)
             continue;
         if (!cppDoc->includedFiles().contains(document->filePath()))
@@ -325,7 +324,7 @@ SemanticInfo::Source BuiltinEditorDocumentProcessor::createSemanticInfoSource(bo
 {
     QByteArray source;
     int revision = 0;
-    if (const auto entry = CppModelManager::instance()->workingCopy().get(filePath())) {
+    if (const auto entry = CppModelManager::workingCopy().get(filePath())) {
         source = entry->first;
         revision = entry->second;
     }
diff --git a/src/plugins/cppeditor/cppbuiltinmodelmanagersupport.cpp b/src/plugins/cppeditor/cppbuiltinmodelmanagersupport.cpp
index 4cc69fe4392..01a208f7032 100644
--- a/src/plugins/cppeditor/cppbuiltinmodelmanagersupport.cpp
+++ b/src/plugins/cppeditor/cppbuiltinmodelmanagersupport.cpp
@@ -105,7 +105,7 @@ void BuiltinModelManagerSupport::followSymbol(const CursorInEditor &data,
 {
     SymbolFinder finder;
     m_followSymbol->findLink(data, processLinkCallback,
-            resolveTarget, CppModelManager::instance()->snapshot(),
+            resolveTarget, CppModelManager::snapshot(),
             data.editorWidget()->semanticInfo().doc, &finder, inNextSplit);
 }
 
@@ -125,7 +125,7 @@ void BuiltinModelManagerSupport::switchDeclDef(const CursorInEditor &data,
 {
     SymbolFinder finder;
     m_followSymbol->switchDeclDef(data, processLinkCallback,
-            CppModelManager::instance()->snapshot(), data.editorWidget()->semanticInfo().doc,
+            CppModelManager::snapshot(), data.editorWidget()->semanticInfo().doc,
             &finder);
 }
 
@@ -144,47 +144,39 @@ void BuiltinModelManagerSupport::globalRename(const CursorInEditor &data,
                                               const QString &replacement,
                                               const std::function<void()> &callback)
 {
-    CppModelManager *modelManager = CppModelManager::instance();
-    if (!modelManager)
-        return;
-
     CppEditorWidget *editorWidget = data.editorWidget();
     QTC_ASSERT(editorWidget, return;);
 
     SemanticInfo info = editorWidget->semanticInfo();
-    info.snapshot = modelManager->snapshot();
+    info.snapshot = CppModelManager::snapshot();
     info.snapshot.insert(info.doc);
     const QTextCursor &cursor = data.cursor();
     if (const CPlusPlus::Macro *macro = findCanonicalMacro(cursor, info.doc)) {
-        modelManager->renameMacroUsages(*macro, replacement);
+        CppModelManager::renameMacroUsages(*macro, replacement);
     } else {
         Internal::CanonicalSymbol cs(info.doc, info.snapshot);
         CPlusPlus::Symbol *canonicalSymbol = cs(cursor);
         if (canonicalSymbol)
-            modelManager->renameUsages(canonicalSymbol, cs.context(), replacement, callback);
+            CppModelManager::renameUsages(canonicalSymbol, cs.context(), replacement, callback);
     }
 }
 
 void BuiltinModelManagerSupport::findUsages(const CursorInEditor &data) const
 {
-    CppModelManager *modelManager = CppModelManager::instance();
-    if (!modelManager)
-        return;
-
     CppEditorWidget *editorWidget = data.editorWidget();
     QTC_ASSERT(editorWidget, return;);
 
     SemanticInfo info = editorWidget->semanticInfo();
-    info.snapshot = modelManager->snapshot();
+    info.snapshot = CppModelManager::snapshot();
     info.snapshot.insert(info.doc);
     const QTextCursor &cursor = data.cursor();
     if (const CPlusPlus::Macro *macro = findCanonicalMacro(cursor, info.doc)) {
-        modelManager->findMacroUsages(*macro);
+        CppModelManager::findMacroUsages(*macro);
     } else {
         Internal::CanonicalSymbol cs(info.doc, info.snapshot);
         CPlusPlus::Symbol *canonicalSymbol = cs(cursor);
         if (canonicalSymbol)
-            modelManager->findUsages(canonicalSymbol, cs.context());
+            CppModelManager::findUsages(canonicalSymbol, cs.context());
     }
 }
 
@@ -199,7 +191,7 @@ void BuiltinModelManagerSupport::switchHeaderSource(const FilePath &filePath,
 void BuiltinModelManagerSupport::checkUnused(const Utils::Link &link, SearchResult *search,
                                              const Utils::LinkHandler &callback)
 {
-    CPlusPlus::Snapshot snapshot = CppModelManager::instance()->snapshot();
+    CPlusPlus::Snapshot snapshot = CppModelManager::snapshot();
     QFile file(link.targetFilePath.toString());
     if (!file.open(QIODevice::ReadOnly))
         return callback(link);
diff --git a/src/plugins/cppeditor/cppcodemodelinspectordialog.cpp b/src/plugins/cppeditor/cppcodemodelinspectordialog.cpp
index 48ee4c80f1e..0b4c5d9af38 100644
--- a/src/plugins/cppeditor/cppcodemodelinspectordialog.cpp
+++ b/src/plugins/cppeditor/cppcodemodelinspectordialog.cpp
@@ -1642,8 +1642,6 @@ void CppCodeModelInspectorDialog::onWorkingCopyDocumentSelected(const QModelInde
 
 void CppCodeModelInspectorDialog::refresh()
 {
-    CppModelManager *cmmi = CppModelManager::instance();
-
     const int oldSnapshotIndex = m_snapshotSelector->currentIndex();
     const bool selectEditorRelevant
         = m_selectEditorRelevantEntriesAfterRefreshCheckBox->isChecked();
@@ -1652,7 +1650,7 @@ void CppCodeModelInspectorDialog::refresh()
     m_snapshotInfos->clear();
     m_snapshotSelector->clear();
 
-    const Snapshot globalSnapshot = cmmi->snapshot();
+    const Snapshot globalSnapshot = CppModelManager::snapshot();
     CppCodeModelInspector::Dumper dumper(globalSnapshot);
     m_snapshotModel->setGlobalSnapshot(globalSnapshot);
 
@@ -1666,7 +1664,7 @@ void CppCodeModelInspectorDialog::refresh()
     CppEditorDocumentHandle *cppEditorDocument = nullptr;
     if (editor) {
         const FilePath editorFilePath = editor->document()->filePath();
-        cppEditorDocument = cmmi->cppEditorDocument(editorFilePath);
+        cppEditorDocument = CppModelManager::cppEditorDocument(editorFilePath);
         if (auto documentProcessor = CppModelManager::cppEditorDocumentProcessor(editorFilePath)) {
             const Snapshot editorSnapshot = documentProcessor->snapshot();
             m_snapshotInfos->append(SnapshotInfo(editorSnapshot, SnapshotInfo::EditorSnapshot));
@@ -1721,7 +1719,7 @@ void CppCodeModelInspectorDialog::refresh()
         ? cppEditorDocument->processor()->parser()->projectPartInfo().projectPart
         : ProjectPart::ConstPtr();
 
-    const QList<ProjectInfo::ConstPtr> projectInfos = cmmi->projectInfos();
+    const QList<ProjectInfo::ConstPtr> projectInfos = CppModelManager::projectInfos();
     dumper.dumpProjectInfos(projectInfos);
     m_projectPartsModel->configure(projectInfos, editorsProjectPart);
     m_projectPartsView->resizeColumns(ProjectPartsModel::ColumnCount);
@@ -1737,7 +1735,7 @@ void CppCodeModelInspectorDialog::refresh()
     }
 
     // Working Copy
-    const WorkingCopy workingCopy = cmmi->workingCopy();
+    const WorkingCopy workingCopy = CppModelManager::workingCopy();
     dumper.dumpWorkingCopy(workingCopy);
     m_workingCopyModel->configure(workingCopy);
     m_workingCopyView->resizeColumns(WorkingCopyModel::ColumnCount);
@@ -1752,8 +1750,8 @@ void CppCodeModelInspectorDialog::refresh()
     }
 
     // Merged entities
-    dumper.dumpMergedEntities(cmmi->headerPaths(),
-                              ProjectExplorer::Macro::toByteArray(cmmi->definedMacros()));
+    dumper.dumpMergedEntities(CppModelManager::headerPaths(),
+                              ProjectExplorer::Macro::toByteArray(CppModelManager::definedMacros()));
 }
 
 enum DocumentTabs {
diff --git a/src/plugins/cppeditor/cppcodemodelinspectordumper.cpp b/src/plugins/cppeditor/cppcodemodelinspectordumper.cpp
index e2c879b1835..28d96779d66 100644
--- a/src/plugins/cppeditor/cppcodemodelinspectordumper.cpp
+++ b/src/plugins/cppeditor/cppcodemodelinspectordumper.cpp
@@ -395,7 +395,7 @@ QString Utils::toString(const ProjectExplorer::Abi &abi)
 QString Utils::partsForFile(const ::Utils::FilePath &filePath)
 {
     const QList<ProjectPart::ConstPtr> parts
-        = CppModelManager::instance()->projectPart(filePath);
+        = CppModelManager::projectPart(filePath);
     QString result;
     for (const ProjectPart::ConstPtr &part : parts)
         result += part->displayName + QLatin1Char(',');
diff --git a/src/plugins/cppeditor/cppcompletionassist.cpp b/src/plugins/cppeditor/cppcompletionassist.cpp
index 19ad8b5120c..82d15774330 100644
--- a/src/plugins/cppeditor/cppcompletionassist.cpp
+++ b/src/plugins/cppeditor/cppcompletionassist.cpp
@@ -417,7 +417,7 @@ std::unique_ptr<AssistInterface> InternalCompletionAssistProvider::createAssistI
                 BuiltinEditorDocumentParser::get(filePath),
                 languageFeatures,
                 reason,
-                CppModelManager::instance()->workingCopy());
+                CppModelManager::workingCopy());
 }
 
 // -----------------
@@ -2076,7 +2076,7 @@ void CppCompletionAssistInterface::getCppSpecifics() const
     m_gotCppSpecifics = true;
 
     if (m_parser) {
-        m_parser->update({CppModelManager::instance()->workingCopy(),
+        m_parser->update({CppModelManager::workingCopy(),
                           nullptr,
                           Utils::Language::Cxx,
                           false});
diff --git a/src/plugins/cppeditor/cppeditordocument.cpp b/src/plugins/cppeditor/cppeditordocument.cpp
index 9e7856b74b2..e03dc2b40fe 100644
--- a/src/plugins/cppeditor/cppeditordocument.cpp
+++ b/src/plugins/cppeditor/cppeditordocument.cpp
@@ -41,11 +41,6 @@ using namespace Utils;
 namespace CppEditor {
 namespace Internal {
 
-static CppEditor::CppModelManager *mm()
-{
-    return CppEditor::CppModelManager::instance();
-}
-
 enum { processDocumentIntervalInMs = 150 };
 
 class CppEditorDocumentHandleImpl : public CppEditorDocumentHandle
@@ -55,12 +50,12 @@ public:
         : m_cppEditorDocument(cppEditorDocument)
         , m_registrationFilePath(cppEditorDocument->filePath().toString())
     {
-        mm()->registerCppEditorDocument(this);
+        CppModelManager::registerCppEditorDocument(this);
     }
 
     ~CppEditorDocumentHandleImpl() override
     {
-        mm()->unregisterCppEditorDocument(m_registrationFilePath);
+        CppModelManager::unregisterCppEditorDocument(m_registrationFilePath);
     }
 
     FilePath filePath() const override { return m_cppEditorDocument->filePath(); }
@@ -101,7 +96,7 @@ CppEditorDocument::CppEditorDocument()
     connect(this, &IDocument::filePathChanged,
             this, &CppEditorDocument::onFilePathChanged);
 
-    connect(mm(), &CppModelManager::diagnosticsChanged,
+    connect(CppModelManager::instance(), &CppModelManager::diagnosticsChanged,
             this, &CppEditorDocument::onDiagnosticsChanged);
 
     connect(&m_parseContextModel, &ParseContextModel::preferredParseContextChanged,
@@ -187,7 +182,7 @@ void CppEditorDocument::onMimeTypeChanged()
     const QString &mt = mimeType();
     m_isObjCEnabled = (mt == QLatin1String(Constants::OBJECTIVE_C_SOURCE_MIMETYPE)
                        || mt == QLatin1String(Constants::OBJECTIVE_CPP_SOURCE_MIMETYPE));
-    m_completionAssistProvider = mm()->completionAssistProvider();
+    m_completionAssistProvider = CppModelManager::completionAssistProvider();
 
     initializeTimer();
 }
@@ -380,7 +375,7 @@ void CppEditorDocument::updateOutline()
 {
     CPlusPlus::Document::Ptr document;
     if (!usesClangd())
-        document = CppModelManager::instance()->snapshot().document(filePath());
+        document = CppModelManager::snapshot().document(filePath());
     m_overviewModel.update(document);
 }
 
@@ -392,7 +387,7 @@ QFuture<CursorInfo> CppEditorDocument::cursorInfo(const CursorInfoParams &params
 BaseEditorDocumentProcessor *CppEditorDocument::processor()
 {
     if (!m_processor) {
-        m_processor.reset(mm()->createEditorDocumentProcessor(this));
+        m_processor.reset(CppModelManager::createEditorDocumentProcessor(this));
         connect(m_processor.data(),
                 &BaseEditorDocumentProcessor::projectPartInfoUpdated,
                 [this](const ProjectPartInfo &info) {
@@ -493,7 +488,7 @@ void CppEditorDocument::onDiagnosticsChanged(const QString &fileName, const QStr
 
     const Utils::Id category = Utils::Id::fromString(kind);
 
-    for (const auto &diagnostic : mm()->diagnosticMessages()) {
+    for (const auto &diagnostic : CppModelManager::diagnosticMessages()) {
         if (diagnostic.filePath() == filePath()) {
             auto it = std::find_if(std::begin(removedMarks),
                                    std::end(removedMarks),
diff --git a/src/plugins/cppeditor/cppeditoroutline.cpp b/src/plugins/cppeditor/cppeditoroutline.cpp
index a34d2543612..4c39851274b 100644
--- a/src/plugins/cppeditor/cppeditoroutline.cpp
+++ b/src/plugins/cppeditor/cppeditoroutline.cpp
@@ -125,7 +125,7 @@ QWidget *CppEditorOutline::widget() const
 
 QSharedPointer<CPlusPlus::Document> getDocument(const Utils::FilePath &filePath)
 {
-    const CPlusPlus::Snapshot snapshot = CppModelManager::instance()->snapshot();
+    const CPlusPlus::Snapshot snapshot = CppModelManager::snapshot();
     return snapshot.document(filePath);
 }
 
diff --git a/src/plugins/cppeditor/cppeditorplugin.cpp b/src/plugins/cppeditor/cppeditorplugin.cpp
index 223ec0e09f7..40f1917a5a9 100644
--- a/src/plugins/cppeditor/cppeditorplugin.cpp
+++ b/src/plugins/cppeditor/cppeditorplugin.cpp
@@ -231,7 +231,7 @@ void CppEditorPlugin::initialize()
     d = new CppEditorPluginPrivate;
     d->initialize();
 
-    CppModelManager::instance()->registerJsExtension();
+    CppModelManager::registerJsExtension();
     ExtensionSystem::PluginManager::addObject(&d->m_cppProjectUpdaterFactory);
 
     // Menus
@@ -446,9 +446,8 @@ void CppEditorPlugin::initialize()
     cppToolsMenu->addSeparator(Core::Constants::G_DEFAULT_THREE);
     d->m_reparseExternallyChangedFiles = new QAction(Tr::tr("Reparse Externally Changed Files"), this);
     cmd = ActionManager::registerAction(d->m_reparseExternallyChangedFiles, Constants::UPDATE_CODEMODEL);
-    CppModelManager *cppModelManager = CppModelManager::instance();
     connect(d->m_reparseExternallyChangedFiles, &QAction::triggered,
-            cppModelManager, &CppModelManager::updateModifiedSourceFiles);
+            CppModelManager::instance(), &CppModelManager::updateModifiedSourceFiles);
     cppToolsMenu->addAction(cmd, Core::Constants::G_DEFAULT_THREE);
 
     ActionContainer *toolsDebug = ActionManager::actionContainer(Core::Constants::M_TOOLS_DEBUG);
@@ -515,7 +514,7 @@ void CppEditorPlugin::extensionsInitialized()
     });
     ProjectPanelFactory::registerFactory(fileNamesPanelFactory);
 
-    if (CppModelManager::instance()->isClangCodeModelActive()) {
+    if (CppModelManager::isClangCodeModelActive()) {
         d->m_clangdSettingsPage = new ClangdSettingsPage;
         const auto clangdPanelFactory = new ProjectPanelFactory;
         clangdPanelFactory->setPriority(100);
@@ -528,7 +527,7 @@ void CppEditorPlugin::extensionsInitialized()
 
     // Add the hover handler factories here instead of in initialize()
     // so that the Clang Code Model has a chance to hook in.
-    d->m_cppEditorFactory.addHoverHandler(CppModelManager::instance()->createHoverHandler());
+    d->m_cppEditorFactory.addHoverHandler(CppModelManager::createHoverHandler());
     d->m_cppEditorFactory.addHoverHandler(new ColorPreviewHoverHandler);
     d->m_cppEditorFactory.addHoverHandler(new ResourcePreviewHoverHandler);
 
@@ -876,8 +875,7 @@ FilePath correspondingHeaderOrSource(const FilePath &filePath, bool *wasHeader,
 
     // Find files in other projects
     } else {
-        CppModelManager *modelManager = CppModelManager::instance();
-        const QList<ProjectInfo::ConstPtr> projectInfos = modelManager->projectInfos();
+        const QList<ProjectInfo::ConstPtr> projectInfos = CppModelManager::projectInfos();
         for (const ProjectInfo::ConstPtr &projectInfo : projectInfos) {
             const Project *project = projectForProjectInfo(*projectInfo);
             if (project == currentProject)
diff --git a/src/plugins/cppeditor/cppeditorwidget.cpp b/src/plugins/cppeditor/cppeditorwidget.cpp
index e8bf8750110..4ebcf3941ef 100644
--- a/src/plugins/cppeditor/cppeditorwidget.cpp
+++ b/src/plugins/cppeditor/cppeditorwidget.cpp
@@ -383,8 +383,6 @@ public:
     bool shouldOfferOutline() const { return !CppModelManager::usesClangd(m_cppEditorDocument); }
 
 public:
-    QPointer<CppModelManager> m_modelManager;
-
     CppEditorDocument *m_cppEditorDocument;
     CppEditorOutline *m_cppEditorOutline = nullptr;
 
@@ -405,8 +403,7 @@ public:
 };
 
 CppEditorWidgetPrivate::CppEditorWidgetPrivate(CppEditorWidget *q)
-    : m_modelManager(CppModelManager::instance())
-    , m_cppEditorDocument(qobject_cast<CppEditorDocument *>(q->textDocument()))
+    : m_cppEditorDocument(qobject_cast<CppEditorDocument *>(q->textDocument()))
     , m_declDefLinkFinder(new FunctionDeclDefLinkFinder(q))
     , m_localRenaming(q)
     , m_useSelectionsUpdater(q)
@@ -611,7 +608,7 @@ void CppEditorWidget::findUsages(QTextCursor cursor)
     // 'this' in cursorInEditor is never used (and must never be used) asynchronously.
     const CursorInEditor cursorInEditor{cursor, textDocument()->filePath(), this, textDocument()};
     QPointer<CppEditorWidget> cppEditorWidget = this;
-    d->m_modelManager->findUsages(cursorInEditor);
+    CppModelManager::findUsages(cursorInEditor);
 }
 
 void CppEditorWidget::renameUsages(const QString &replacement, QTextCursor cursor)
@@ -626,7 +623,7 @@ void CppEditorWidget::renameUsages(const QString &replacement, QTextCursor curso
         showRenameWarningIfFileIsGenerated(link.targetFilePath);
         CursorInEditor cursorInEditor{cursor, textDocument()->filePath(), this, textDocument()};
         QPointer<CppEditorWidget> cppEditorWidget = this;
-        d->m_modelManager->globalRename(cursorInEditor, replacement);
+        CppModelManager::globalRename(cursorInEditor, replacement);
     };
     CppModelManager::followSymbol(
                 CursorInEditor{cursor, textDocument()->filePath(), this, textDocument()},
@@ -640,7 +637,7 @@ void CppEditorWidget::renameUsages(const Utils::FilePath &filePath, const QStrin
         cursor = textCursor();
     CursorInEditor cursorInEditor{cursor, filePath, this, textDocument()};
     QPointer<CppEditorWidget> cppEditorWidget = this;
-    d->m_modelManager->globalRename(cursorInEditor, replacement, callback);
+    CppModelManager::globalRename(cursorInEditor, replacement, callback);
 }
 
 bool CppEditorWidget::selectBlockUp()
@@ -695,15 +692,14 @@ bool CppEditorWidget::isWidgetHighlighted(QWidget *widget)
 
 namespace {
 
-QList<ProjectPart::ConstPtr> fetchProjectParts(CppModelManager *modelManager,
-                                               const Utils::FilePath &filePath)
+QList<ProjectPart::ConstPtr> fetchProjectParts(const Utils::FilePath &filePath)
 {
-    QList<ProjectPart::ConstPtr> projectParts = modelManager->projectPart(filePath);
+    QList<ProjectPart::ConstPtr> projectParts = CppModelManager::projectPart(filePath);
 
     if (projectParts.isEmpty())
-        projectParts = modelManager->projectPartFromDependencies(filePath);
+        projectParts = CppModelManager::projectPartFromDependencies(filePath);
     if (projectParts.isEmpty())
-        projectParts.append(modelManager->fallbackProjectPart());
+        projectParts.append(CppModelManager::fallbackProjectPart());
 
     return projectParts;
 }
@@ -728,10 +724,10 @@ const ProjectPart *findProjectPartForCurrentProject(
 
 const ProjectPart *CppEditorWidget::projectPart() const
 {
-    if (!d->m_modelManager)
+    if (!CppModelManager::instance())
         return nullptr;
 
-    auto projectParts = fetchProjectParts(d->m_modelManager, textDocument()->filePath());
+    auto projectParts = fetchProjectParts(textDocument()->filePath());
 
     return findProjectPartForCurrentProject(projectParts,
                                             ProjectExplorer::ProjectTree::currentProject());
@@ -868,11 +864,11 @@ void CppEditorWidget::renameSymbolUnderCursor()
     };
 
     viewport()->setCursor(Qt::BusyCursor);
-    d->m_modelManager->startLocalRenaming(CursorInEditor{textCursor(),
-                                                         textDocument()->filePath(),
-                                                         this, textDocument()},
-                                          projPart,
-                                          std::move(renameSymbols));
+    CppModelManager::startLocalRenaming(CursorInEditor{textCursor(),
+                                                       textDocument()->filePath(),
+                                                       this, textDocument()},
+                                        projPart,
+                                        std::move(renameSymbols));
 }
 
 void CppEditorWidget::updatePreprocessorButtonTooltip()
@@ -887,7 +883,7 @@ void CppEditorWidget::updatePreprocessorButtonTooltip()
 
 void CppEditorWidget::switchDeclarationDefinition(bool inNextSplit)
 {
-    if (!d->m_modelManager)
+    if (!CppModelManager::instance())
         return;
 
     const CursorInEditor cursor(textCursor(), textDocument()->filePath(), this, textDocument());
@@ -901,7 +897,7 @@ void CppEditorWidget::switchDeclarationDefinition(bool inNextSplit)
 
 void CppEditorWidget::followSymbolToType(bool inNextSplit)
 {
-    if (!d->m_modelManager)
+    if (!CppModelManager::instance())
         return;
 
     const CursorInEditor cursor(textCursor(), textDocument()->filePath(), this, textDocument());
@@ -968,7 +964,7 @@ void CppEditorWidget::findLinkAt(const QTextCursor &cursor,
                                  bool resolveTarget,
                                  bool inNextSplit)
 {
-    if (!d->m_modelManager)
+    if (!CppModelManager::instance())
         return processLinkCallback(Utils::Link());
 
     if (followUrl(cursor, processLinkCallback))
@@ -1269,8 +1265,7 @@ std::unique_ptr<AssistInterface> CppEditorWidget::createAssistInterface(AssistKi
             return cap->createAssistInterface(textDocument()->filePath(), this, getFeatures(), reason);
 
         if (isOldStyleSignalOrSlot()) {
-            return CppModelManager::instance()
-                ->completionAssistProvider()
+            return CppModelManager::completionAssistProvider()
                 ->createAssistInterface(textDocument()->filePath(), this, getFeatures(), reason);
         }
     }
@@ -1331,7 +1326,7 @@ void CppEditorWidget::updateFunctionDeclDefLinkNow()
     if (!isSemanticInfoValidExceptLocalUses())
         return;
 
-    Snapshot snapshot = d->m_modelManager->snapshot();
+    Snapshot snapshot = CppModelManager::snapshot();
     snapshot.insert(semanticDoc);
 
     d->m_declDefLinkFinder->startFindLinkAt(textCursor(), semanticDoc, snapshot);
diff --git a/src/plugins/cppeditor/cppelementevaluator.cpp b/src/plugins/cppeditor/cppelementevaluator.cpp
index 27b481cd0c7..2d5d1c4af48 100644
--- a/src/plugins/cppeditor/cppelementevaluator.cpp
+++ b/src/plugins/cppeditor/cppelementevaluator.cpp
@@ -475,7 +475,7 @@ static QFuture<QSharedPointer<CppElement>> exec(SourceFunction &&sourceFunction,
                                                 ExecFunction &&execFunction,
                                                 bool followTypedef = true)
 {
-    const Snapshot &snapshot = CppModelManager::instance()->snapshot();
+    const Snapshot &snapshot = CppModelManager::snapshot();
 
     Document::Ptr doc;
     QString expression;
@@ -497,7 +497,7 @@ static QFuture<QSharedPointer<CppElement>> asyncExec(
         const CPlusPlus::LookupContext &lookupContext)
 {
     return Utils::asyncRun(&createTypeHierarchy, snapshot, lookupItem, lookupContext,
-                           *CppModelManager::instance()->symbolFinder());
+                           *CppModelManager::symbolFinder());
 }
 
 class FromExpressionFunctor
@@ -589,7 +589,7 @@ QFuture<QSharedPointer<CppElement>> FromGuiFunctor::syncExec(
     QFutureInterface<QSharedPointer<CppElement>> futureInterface;
     futureInterface.reportStarted();
     m_element = handleLookupItemMatch(snapshot, lookupItem, lookupContext,
-                                      *CppModelManager::instance()->symbolFinder());
+                                      *CppModelManager::symbolFinder());
     futureInterface.reportResult(m_element);
     futureInterface.reportFinished();
     return futureInterface.future();
@@ -694,7 +694,7 @@ const QString &CppElementEvaluator::diagnosis() const
 
 Utils::Link CppElementEvaluator::linkFromExpression(const QString &expression, const FilePath &filePath)
 {
-    const Snapshot &snapshot = CppModelManager::instance()->snapshot();
+    const Snapshot &snapshot = CppModelManager::snapshot();
     Document::Ptr doc = snapshot.document(filePath);
     if (doc.isNull())
         return Utils::Link();
diff --git a/src/plugins/cppeditor/cppfindreferences.cpp b/src/plugins/cppeditor/cppfindreferences.cpp
index 460ad7d0b2d..78777021a7b 100644
--- a/src/plugins/cppeditor/cppfindreferences.cpp
+++ b/src/plugins/cppeditor/cppfindreferences.cpp
@@ -437,9 +437,9 @@ void CppFindReferences::findAll_helper(SearchResult *search, CPlusPlus::Symbol *
 
     if (search->isInteractive())
         SearchResultWindow::instance()->popup(IOutputPane::ModeSwitch | IOutputPane::WithFocus);
-    const WorkingCopy workingCopy = m_modelManager->workingCopy();
+    const WorkingCopy workingCopy = CppModelManager::workingCopy();
     QFuture<CPlusPlus::Usage> result;
-    result = Utils::asyncRun(m_modelManager->sharedThreadPool(), find_helper,
+    result = Utils::asyncRun(CppModelManager::sharedThreadPool(), find_helper,
                              workingCopy, context, symbol, categorize);
     createWatcher(result, search);
 
@@ -484,7 +484,7 @@ void CppFindReferences::searchAgain(SearchResult *search)
 {
     CppFindReferencesParameters parameters = search->userData().value<CppFindReferencesParameters>();
     parameters.filesToRename.clear();
-    CPlusPlus::Snapshot snapshot = CppModelManager::instance()->snapshot();
+    CPlusPlus::Snapshot snapshot = CppModelManager::snapshot();
     search->restart();
     CPlusPlus::LookupContext context;
     CPlusPlus::Symbol *symbol = findSymbol(parameters, snapshot, &context);
@@ -544,7 +544,7 @@ CPlusPlus::Symbol *CppFindReferences::findSymbol(const CppFindReferencesParamete
 
     CPlusPlus::Document::Ptr newSymbolDocument = snapshot.document(parameters.symbolFilePath);
     // document is not parsed and has no bindings yet, do it
-    QByteArray source = getSource(newSymbolDocument->filePath(), m_modelManager->workingCopy());
+    QByteArray source = getSource(newSymbolDocument->filePath(), CppModelManager::workingCopy());
     CPlusPlus::Document::Ptr doc =
             snapshot.preprocessedDocument(source, newSymbolDocument->filePath());
     doc->check();
@@ -747,8 +747,8 @@ void CppFindReferences::findMacroUses(const CPlusPlus::Macro &macro, const QStri
         Core::EditorManager::openEditorAtSearchResult(item);
     });
 
-    const CPlusPlus::Snapshot snapshot = m_modelManager->snapshot();
-    const WorkingCopy workingCopy = m_modelManager->workingCopy();
+    const CPlusPlus::Snapshot snapshot = CppModelManager::snapshot();
+    const WorkingCopy workingCopy = CppModelManager::workingCopy();
 
     // add the macro definition itself
     {
@@ -768,7 +768,7 @@ void CppFindReferences::findMacroUses(const CPlusPlus::Macro &macro, const QStri
     }
 
     QFuture<CPlusPlus::Usage> result;
-    result = Utils::asyncRun(m_modelManager->sharedThreadPool(), findMacroUses_helper,
+    result = Utils::asyncRun(CppModelManager::sharedThreadPool(), findMacroUses_helper,
                              workingCopy, snapshot, macro);
     createWatcher(result, search);
 
@@ -829,8 +829,8 @@ void CppFindReferences::checkUnused(Core::SearchResult *search, const Link &link
     });
     connect(search, &SearchResult::canceled, watcher, [watcher] { watcher->cancel(); });
     connect(search, &SearchResult::destroyed, watcher, [watcher] { watcher->cancel(); });
-    watcher->setFuture(Utils::asyncRun(m_modelManager->sharedThreadPool(), find_helper,
-                                       m_modelManager->workingCopy(), context, symbol, true));
+    watcher->setFuture(Utils::asyncRun(CppModelManager::sharedThreadPool(), find_helper,
+                                       CppModelManager::workingCopy(), context, symbol, true));
 }
 
 void CppFindReferences::createWatcher(const QFuture<CPlusPlus::Usage> &future, SearchResult *search)
diff --git a/src/plugins/cppeditor/cppfollowsymbolundercursor.cpp b/src/plugins/cppeditor/cppfollowsymbolundercursor.cpp
index c36a83a3f6b..862866e01c5 100644
--- a/src/plugins/cppeditor/cppfollowsymbolundercursor.cpp
+++ b/src/plugins/cppeditor/cppfollowsymbolundercursor.cpp
@@ -209,7 +209,7 @@ Link findMacroLink(const QByteArray &name, const Document::Ptr &doc)
 {
     if (!name.isEmpty()) {
         if (doc) {
-            const Snapshot snapshot = CppModelManager::instance()->snapshot();
+            const Snapshot snapshot = CppModelManager::snapshot();
             QSet<QString> processed;
             return findMacroLink_helper(name, doc, snapshot, &processed);
         }
diff --git a/src/plugins/cppeditor/cppincludehierarchy.cpp b/src/plugins/cppeditor/cppincludehierarchy.cpp
index caad2e0937b..6b543f6163a 100644
--- a/src/plugins/cppeditor/cppincludehierarchy.cpp
+++ b/src/plugins/cppeditor/cppincludehierarchy.cpp
@@ -54,7 +54,7 @@ enum {
 
 static Snapshot globalSnapshot()
 {
-    return CppModelManager::instance()->snapshot();
+    return CppModelManager::snapshot();
 }
 
 struct FileAndLine
diff --git a/src/plugins/cppeditor/cppincludesfilter.cpp b/src/plugins/cppeditor/cppincludesfilter.cpp
index 9711b6f52de..e1df13f7a2d 100644
--- a/src/plugins/cppeditor/cppincludesfilter.cpp
+++ b/src/plugins/cppeditor/cppincludesfilter.cpp
@@ -90,7 +90,7 @@ CppIncludesFilter::CppIncludesFilter()
             if (entry)
                 inputFilePaths.insert(entry->filePath());
         }
-        const CPlusPlus::Snapshot snapshot = CppModelManager::instance()->snapshot();
+        const CPlusPlus::Snapshot snapshot = CppModelManager::snapshot();
         return [snapshot, inputFilePaths](const QFuture<void> &future) {
             // This body runs in non-main thread
             return generateFilePaths(future, snapshot, inputFilePaths);
diff --git a/src/plugins/cppeditor/cppindexingsupport.cpp b/src/plugins/cppeditor/cppindexingsupport.cpp
index 6aafb6043d7..8cb0677edd9 100644
--- a/src/plugins/cppeditor/cppindexingsupport.cpp
+++ b/src/plugins/cppeditor/cppindexingsupport.cpp
@@ -31,7 +31,7 @@ static Q_LOGGING_CATEGORY(indexerLog, "qtc.cppeditor.indexer", QtWarningMsg)
 
 SymbolSearcher::SymbolSearcher(const SymbolSearcher::Parameters &parameters,
                                const QSet<QString> &fileNames)
-    : m_snapshot(CppModelManager::instance()->snapshot())
+    : m_snapshot(CppModelManager::snapshot())
     , m_parameters(parameters)
     , m_fileNames(fileNames)
 {}
@@ -138,8 +138,7 @@ void indexFindErrors(QPromise<void> &promise, const ParseParams params)
         // Parse the file as precisely as possible
         BuiltinEditorDocumentParser parser(FilePath::fromString(file));
         parser.setReleaseSourceAndAST(false);
-        parser.update({CppModelManager::instance()->workingCopy(), nullptr,
-                       Language::Cxx, false});
+        parser.update({CppModelManager::workingCopy(), nullptr, Language::Cxx, false});
         CPlusPlus::Document::Ptr document = parser.document();
         QTC_ASSERT(document, return);
 
@@ -181,8 +180,7 @@ void index(QPromise<void> &promise, const ParseParams params)
     const FilePath &conf = CppModelManager::configurationFileName();
     bool processingHeaders = false;
 
-    CppModelManager *cmm = CppModelManager::instance();
-    const ProjectExplorer::HeaderPaths fallbackHeaderPaths = cmm->headerPaths();
+    const ProjectExplorer::HeaderPaths fallbackHeaderPaths = CppModelManager::headerPaths();
     const CPlusPlus::LanguageFeatures defaultFeatures =
         CPlusPlus::LanguageFeatures::defaultFeatures();
 
@@ -192,7 +190,7 @@ void index(QPromise<void> &promise, const ParseParams params)
             break;
 
         const QString fileName = files.at(i);
-        const QList<ProjectPart::ConstPtr> parts = cmm->projectPart(fileName);
+        const QList<ProjectPart::ConstPtr> parts = CppModelManager::projectPart(fileName);
         const CPlusPlus::LanguageFeatures languageFeatures = parts.isEmpty()
                                                                  ? defaultFeatures
                                                                  : parts.first()->languageFeatures;
@@ -236,7 +234,7 @@ void parse(QPromise<void> &promise, const ParseParams params)
         index(promise, params);
 
     promise.setProgressValue(files.size());
-    CppModelManager::instance()->finishedRefreshingSourceFiles(files);
+    CppModelManager::finishedRefreshingSourceFiles(files);
 }
 
 } // anonymous namespace
@@ -306,15 +304,13 @@ bool CppIndexingSupport::isFindErrorsIndexingActive()
 QFuture<void> CppIndexingSupport::refreshSourceFiles(const QSet<QString> &sourceFiles,
                                                      CppModelManager::ProgressNotificationMode mode)
 {
-    CppModelManager *mgr = CppModelManager::instance();
-
     ParseParams params;
     params.indexerFileSizeLimitInMb = indexerFileSizeLimitInMb();
-    params.headerPaths = mgr->headerPaths();
-    params.workingCopy = mgr->workingCopy();
+    params.headerPaths = CppModelManager::headerPaths();
+    params.workingCopy = CppModelManager::workingCopy();
     params.sourceFiles = sourceFiles;
 
-    QFuture<void> result = Utils::asyncRun(mgr->sharedThreadPool(), parse, params);
+    QFuture<void> result = Utils::asyncRun(CppModelManager::sharedThreadPool(), parse, params);
     m_synchronizer.addFuture(result);
 
     if (mode == CppModelManager::ForcedProgressNotification || sourceFiles.count() > 1) {
diff --git a/src/plugins/cppeditor/cpplocatorfilter.cpp b/src/plugins/cppeditor/cpplocatorfilter.cpp
index cd1add7786e..383db4b94d3 100644
--- a/src/plugins/cppeditor/cpplocatorfilter.cpp
+++ b/src/plugins/cppeditor/cpplocatorfilter.cpp
@@ -41,7 +41,7 @@ void matchesFor(QPromise<void> &promise, const LocatorStorage &storage,
     const bool hasColonColon = input.contains("::");
     const QRegularExpression shortRegexp = hasColonColon
             ? ILocatorFilter::createRegExp(input.mid(input.lastIndexOf("::") + 2)) : regexp;
-    CppLocatorData *locatorData = CppModelManager::instance()->locatorData();
+    CppLocatorData *locatorData = CppModelManager::locatorData();
     locatorData->filterAllFiles([&](const IndexItem::Ptr &info) {
         if (promise.isCanceled())
             return IndexItem::Break;
@@ -174,7 +174,7 @@ QList<IndexItem::Ptr> itemsOfCurrentDocument(const FilePath &currentFileName)
         return {};
 
     QList<IndexItem::Ptr> results;
-    const Snapshot snapshot = CppModelManager::instance()->snapshot();
+    const Snapshot snapshot = CppModelManager::snapshot();
     if (const Document::Ptr thisDocument = snapshot.document(currentFileName)) {
         SearchSymbols search;
         search.setSymbolsToSearchFor(SymbolSearcher::Declarations |
diff --git a/src/plugins/cppeditor/cppmodelmanager.cpp b/src/plugins/cppeditor/cppmodelmanager.cpp
index 7fb8115873e..3980f99ac89 100644
--- a/src/plugins/cppeditor/cppmodelmanager.cpp
+++ b/src/plugins/cppeditor/cppmodelmanager.cpp
@@ -215,6 +215,8 @@ public:
     QList<Document::DiagnosticMessage> m_diagnosticMessages;
 };
 
+static CppModelManagerPrivate *d;
+
 } // namespace Internal
 using namespace Internal;
 
@@ -296,14 +298,13 @@ QSet<FilePath> CppModelManager::timeStampModifiedFiles(const QList<Document::Ptr
  */
 CppSourceProcessor *CppModelManager::createSourceProcessor()
 {
-    CppModelManager *that = instance();
-    return new CppSourceProcessor(that->snapshot(), [that](const Document::Ptr &doc) {
-        const Document::Ptr previousDocument = that->document(doc->filePath());
+    return new CppSourceProcessor(snapshot(), [](const Document::Ptr &doc) {
+        const Document::Ptr previousDocument = document(doc->filePath());
         const unsigned newRevision = previousDocument.isNull()
                 ? 1U
                 : previousDocument->revision() + 1;
         doc->setRevision(newRevision);
-        that->emitDocumentUpdated(doc);
+        emitDocumentUpdated(doc);
         doc->releaseSourceAndAST();
     });
 }
@@ -314,7 +315,7 @@ const FilePath &CppModelManager::editorConfigurationFileName()
     return config;
 }
 
-ModelManagerSupport *CppModelManager::modelManagerSupport(Backend backend) const
+ModelManagerSupport *CppModelManager::modelManagerSupport(Backend backend)
 {
     return backend == Backend::Builtin
             ? &d->m_builtinModelManagerSupport : d->m_activeModelManagerSupport;
@@ -325,27 +326,26 @@ void CppModelManager::startLocalRenaming(const CursorInEditor &data,
                                          RenameCallback &&renameSymbolsCallback,
                                          Backend backend)
 {
-    instance()->modelManagerSupport(backend)
+    modelManagerSupport(backend)
             ->startLocalRenaming(data, projectPart, std::move(renameSymbolsCallback));
 }
 
 void CppModelManager::globalRename(const CursorInEditor &data, const QString &replacement,
                                    const std::function<void()> &callback, Backend backend)
 {
-    instance()->modelManagerSupport(backend)->globalRename(data, replacement, callback);
+    modelManagerSupport(backend)->globalRename(data, replacement, callback);
 }
 
 void CppModelManager::findUsages(const CursorInEditor &data, Backend backend)
 {
-    instance()->modelManagerSupport(backend)->findUsages(data);
+    modelManagerSupport(backend)->findUsages(data);
 }
 
 void CppModelManager::switchHeaderSource(bool inNextSplit, Backend backend)
 {
     const IDocument *currentDocument = EditorManager::currentDocument();
     QTC_ASSERT(currentDocument, return);
-    instance()->modelManagerSupport(backend)->switchHeaderSource(currentDocument->filePath(),
-                                                                 inNextSplit);
+    modelManagerSupport(backend)->switchHeaderSource(currentDocument->filePath(), inNextSplit);
 }
 
 void CppModelManager::showPreprocessedFile(bool inNextSplit)
@@ -383,7 +383,7 @@ void CppModelManager::showPreprocessedFile(bool inNextSplit)
                 TemporaryDirectory::masterTemporaryDirectory()->filePath(outFileName));
     const auto useBuiltinPreprocessor = [filePath, outFilePath, inNextSplit,
                                          contents = doc->contents()] {
-        const Document::Ptr preprocessedDoc = instance()->snapshot()
+        const Document::Ptr preprocessedDoc = snapshot()
                 .preprocessedDocument(contents, filePath);
         QByteArray content = R"(/* Created using Qt Creator's built-in preprocessor. */
 /* See Tools -> Debug Qt Creator -> Inspect C++ Code Model for the parameters used.
@@ -430,7 +430,7 @@ void CppModelManager::showPreprocessedFile(bool inNextSplit)
     }
 
     const ProjectPart::ConstPtr projectPart = Utils::findOrDefault(
-                instance()->projectPart(filePath), [](const ProjectPart::ConstPtr &pp) {
+                CppModelManager::projectPart(filePath), [](const ProjectPart::ConstPtr &pp) {
         return pp->belongsToProject(ProjectTree::currentProject());
     });
     if (!projectPart) {
@@ -513,7 +513,7 @@ static void checkNextFunctionForUnused(
     remainingLinks = remainingLinksList;
     activeLinks = activeLinksList;
     search->setUserData(data);
-    CppModelManager::instance()->modelManagerSupport(CppModelManager::Backend::Best)
+    CppModelManager::modelManagerSupport(CppModelManager::Backend::Best)
             ->checkUnused(link, search, [search, link, findRefsFuture, actionsSwitcher](const Link &) {
         if (!search || findRefsFuture->isCanceled())
             return;
@@ -620,7 +620,7 @@ void CppModelManager::checkForUnusedSymbol(SearchResult *search,
                                            const CPlusPlus::LookupContext &context,
                                            const LinkHandler &callback)
 {
-    instance()->d->m_findReferences->checkUnused(search, link, symbol, context, callback);
+    d->m_findReferences->checkUnused(search, link, symbol, context, callback);
 }
 
 int argumentPositionOf(const AST *last, const CallAST *callAst)
@@ -642,7 +642,7 @@ int argumentPositionOf(const AST *last, const CallAST *callAst)
 
 SignalSlotType CppModelManager::getSignalSlotType(const FilePath &filePath,
                                                   const QByteArray &content,
-                                                  int position) const
+                                                  int position)
 {
     if (content.isEmpty())
         return SignalSlotType::None;
@@ -653,7 +653,7 @@ SignalSlotType CppModelManager::getSignalSlotType(const FilePath &filePath,
     if (position > 2 && content.mid(position - 2, 2) == "::")
         fixedContent.insert(position, 'x');
 
-    const Snapshot snapshot = this->snapshot();
+    const Snapshot snapshot = CppModelManager::snapshot();
     const Document::Ptr document = snapshot.preprocessedDocument(fixedContent, filePath);
     document->check();
     QTextDocument textDocument(QString::fromUtf8(fixedContent));
@@ -763,7 +763,7 @@ SignalSlotType CppModelManager::getSignalSlotType(const FilePath &filePath,
 
 FollowSymbolUnderCursor &CppModelManager::builtinFollowSymbol()
 {
-    return instance()->d->m_builtinModelManagerSupport.followSymbolInterface();
+    return d->m_builtinModelManagerSupport.followSymbolInterface();
 }
 
 template<class FilterClass>
@@ -804,32 +804,32 @@ void CppModelManager::setCurrentDocumentFilter(std::unique_ptr<ILocatorFilter> &
     setFilter(d->m_currentDocumentFilter, std::move(filter));
 }
 
-ILocatorFilter *CppModelManager::locatorFilter() const
+ILocatorFilter *CppModelManager::locatorFilter()
 {
     return d->m_locatorFilter.get();
 }
 
-ILocatorFilter *CppModelManager::classesFilter() const
+ILocatorFilter *CppModelManager::classesFilter()
 {
     return d->m_classesFilter.get();
 }
 
-ILocatorFilter *CppModelManager::includesFilter() const
+ILocatorFilter *CppModelManager::includesFilter()
 {
     return d->m_includesFilter.get();
 }
 
-ILocatorFilter *CppModelManager::functionsFilter() const
+ILocatorFilter *CppModelManager::functionsFilter()
 {
     return d->m_functionsFilter.get();
 }
 
-IFindFilter *CppModelManager::symbolsFindFilter() const
+IFindFilter *CppModelManager::symbolsFindFilter()
 {
     return d->m_symbolsFindFilter.get();
 }
 
-ILocatorFilter *CppModelManager::currentDocumentFilter() const
+ILocatorFilter *CppModelManager::currentDocumentFilter()
 {
     return d->m_currentDocumentFilter.get();
 }
@@ -841,7 +841,7 @@ const FilePath &CppModelManager::configurationFileName()
 
 void CppModelManager::updateModifiedSourceFiles()
 {
-    const Snapshot snapshot = this->snapshot();
+    const Snapshot snapshot = CppModelManager::snapshot();
     QList<Document::Ptr> documentsToCheck;
     for (const Document::Ptr &document : snapshot)
         documentsToCheck << document;
@@ -869,7 +869,7 @@ CppModelManager *CppModelManager::instance()
 
 void CppModelManager::registerJsExtension()
 {
-    JsExpander::registerGlobalObject("Cpp", [this] {
+    JsExpander::registerGlobalObject("Cpp", [] {
         return new CppToolsJsExtension(&d->m_locatorData);
     });
 }
@@ -878,16 +878,16 @@ void CppModelManager::initCppTools()
 {
     // Objects
     connect(VcsManager::instance(), &VcsManager::repositoryChanged,
-            this, &CppModelManager::updateModifiedSourceFiles);
+            m_instance, &CppModelManager::updateModifiedSourceFiles);
     connect(DocumentManager::instance(), &DocumentManager::filesChangedInternally,
-            this, [this](const FilePaths &filePaths) {
+            m_instance, [](const FilePaths &filePaths) {
         updateSourceFiles(toSet(filePaths));
     });
 
-    connect(this, &CppModelManager::documentUpdated,
+    connect(m_instance, &CppModelManager::documentUpdated,
             &d->m_locatorData, &CppLocatorData::onDocumentUpdated);
 
-    connect(this, &CppModelManager::aboutToRemoveFiles,
+    connect(m_instance, &CppModelManager::aboutToRemoveFiles,
             &d->m_locatorData, &CppLocatorData::onAboutToRemoveFiles);
 
     // Set up builtin filters
@@ -895,7 +895,7 @@ void CppModelManager::initCppTools()
     setClassesFilter(std::make_unique<CppClassesFilter>());
     setIncludesFilter(std::make_unique<CppIncludesFilter>());
     setFunctionsFilter(std::make_unique<CppFunctionsFilter>());
-    setSymbolsFindFilter(std::make_unique<SymbolsFindFilter>(this));
+    setSymbolsFindFilter(std::make_unique<SymbolsFindFilter>());
     setCurrentDocumentFilter(std::make_unique<CppCurrentDocumentFilter>());
     // Setup matchers
     LocatorMatcher::addMatcherCreator(MatcherType::AllSymbols, [] {
@@ -912,24 +912,13 @@ void CppModelManager::initCppTools()
     });
 }
 
-static bool setExtraDiagnosticsCallback(const QString &fileName, const QString &kind,
-                                     const QList<Document::DiagnosticMessage> &diagnostics)
-{
-    return m_instance->setExtraDiagnostics(fileName, kind, diagnostics);
-}
-
-static Snapshot snapshotCallback()
-{
-    return m_instance->snapshot();
-}
-
 CppModelManager::CppModelManager()
-    : d(new CppModelManagerPrivate)
 {
+    d = new CppModelManagerPrivate;
     m_instance = this;
 
-    CppModelManagerBase::registerSetExtraDiagnosticsCallback(&setExtraDiagnosticsCallback);
-    CppModelManagerBase::registerSnapshotCallback(&snapshotCallback);
+    CppModelManagerBase::registerSetExtraDiagnosticsCallback(&CppModelManager::setExtraDiagnostics);
+    CppModelManagerBase::registerSnapshotCallback(&CppModelManager::snapshot);
 
     // Used for weak dependency in VcsBaseSubmitEditor
     setObjectName("CppModelManager");
@@ -1002,13 +991,13 @@ CppModelManager::~CppModelManager()
     delete d;
 }
 
-Snapshot CppModelManager::snapshot() const
+Snapshot CppModelManager::snapshot()
 {
     QMutexLocker locker(&d->m_snapshotMutex);
     return d->m_snapshot;
 }
 
-Document::Ptr CppModelManager::document(const FilePath &filePath) const
+Document::Ptr CppModelManager::document(const FilePath &filePath)
 {
     QMutexLocker locker(&d->m_snapshotMutex);
     return d->m_snapshot.document(filePath);
@@ -1042,7 +1031,7 @@ void CppModelManager::ensureUpdated()
     d->m_dirty = false;
 }
 
-FilePaths CppModelManager::internalProjectFiles() const
+FilePaths CppModelManager::internalProjectFiles()
 {
     FilePaths files;
     for (const ProjectData &projectData : std::as_const(d->m_projectData)) {
@@ -1055,7 +1044,7 @@ FilePaths CppModelManager::internalProjectFiles() const
     return files;
 }
 
-HeaderPaths CppModelManager::internalHeaderPaths() const
+HeaderPaths CppModelManager::internalHeaderPaths()
 {
     HeaderPaths headerPaths;
     for (const ProjectData &projectData: std::as_const(d->m_projectData)) {
@@ -1079,7 +1068,7 @@ static void addUnique(const Macros &newMacros, Macros &macros,
     }
 }
 
-Macros CppModelManager::internalDefinedMacros() const
+Macros CppModelManager::internalDefinedMacros()
 {
     Macros macros;
     QSet<ProjectExplorer::Macro> alreadyIn;
@@ -1107,7 +1096,7 @@ void CppModelManager::dumpModelManagerConfiguration(const QString &logFileId)
                               ProjectExplorer::Macro::toByteArray(definedMacros()));
 }
 
-QSet<AbstractEditorSupport *> CppModelManager::abstractEditorSupports() const
+QSet<AbstractEditorSupport *> CppModelManager::abstractEditorSupports()
 {
     return d->m_extraEditorSupports;
 }
@@ -1122,7 +1111,7 @@ void CppModelManager::removeExtraEditorSupport(AbstractEditorSupport *editorSupp
     d->m_extraEditorSupports.remove(editorSupport);
 }
 
-CppEditorDocumentHandle *CppModelManager::cppEditorDocument(const FilePath &filePath) const
+CppEditorDocumentHandle *CppModelManager::cppEditorDocument(const FilePath &filePath)
 {
     if (filePath.isEmpty())
         return nullptr;
@@ -1133,7 +1122,7 @@ CppEditorDocumentHandle *CppModelManager::cppEditorDocument(const FilePath &file
 
 BaseEditorDocumentProcessor *CppModelManager::cppEditorDocumentProcessor(const FilePath &filePath)
 {
-    const auto document = instance()->cppEditorDocument(filePath);
+    const auto document = cppEditorDocument(filePath);
     return document ? document->processor() : nullptr;
 }
 
@@ -1237,17 +1226,17 @@ WorkingCopy CppModelManager::buildWorkingCopyList()
     return workingCopy;
 }
 
-WorkingCopy CppModelManager::workingCopy() const
+WorkingCopy CppModelManager::workingCopy()
 {
-    return const_cast<CppModelManager *>(this)->buildWorkingCopyList();
+    return buildWorkingCopyList();
 }
 
-QByteArray CppModelManager::codeModelConfiguration() const
+QByteArray CppModelManager::codeModelConfiguration()
 {
     return QByteArray::fromRawData(pp_configuration, qstrlen(pp_configuration));
 }
 
-CppLocatorData *CppModelManager::locatorData() const
+CppLocatorData *CppModelManager::locatorData()
 {
     return &d->m_locatorData;
 }
@@ -1308,14 +1297,14 @@ QFuture<void> CppModelManager::updateSourceFiles(const QSet<FilePath> &sourceFil
     return d->m_internalIndexingSupport->refreshSourceFiles(filteredFiles, mode);
 }
 
-ProjectInfoList CppModelManager::projectInfos() const
+ProjectInfoList CppModelManager::projectInfos()
 {
     QReadLocker locker(&d->m_projectLock);
     return Utils::transform<QList<ProjectInfo::ConstPtr>>(d->m_projectData,
             [](const ProjectData &d) { return d.projectInfo; });
 }
 
-ProjectInfo::ConstPtr CppModelManager::projectInfo(Project *project) const
+ProjectInfo::ConstPtr CppModelManager::projectInfo(Project *project)
 {
     QReadLocker locker(&d->m_projectLock);
     return d->m_projectData.value(project).projectInfo;
@@ -1335,7 +1324,7 @@ void CppModelManager::removeProjectInfoFilesAndIncludesFromSnapshot(const Projec
     }
 }
 
-const QList<CppEditorDocumentHandle *> CppModelManager::cppEditorDocuments() const
+const QList<CppEditorDocumentHandle *> CppModelManager::cppEditorDocuments()
 {
     QMutexLocker locker(&d->m_cppEditorDocumentsMutex);
     return d->m_cppEditorDocuments.values();
@@ -1453,7 +1442,7 @@ void CppModelManagerPrivate::setupWatcher(const QFuture<void> &future, Project *
     projectData->indexer->setFuture(future);
 }
 
-void CppModelManager::updateCppEditorDocuments(bool projectsUpdated) const
+void CppModelManager::updateCppEditorDocuments(bool projectsUpdated)
 {
     // Refresh visible documents
     QSet<IDocument *> visibleCppEditorDocuments;
@@ -1534,7 +1523,7 @@ QFuture<void> CppModelManager::updateProjectInfo(const ProjectInfo::ConstPtr &ne
                 const QSet<FilePath> removedFiles = comparer.removedFiles();
                 if (!removedFiles.isEmpty()) {
                     filesRemoved = true;
-                    emit aboutToRemoveFiles(transform<QStringList>(removedFiles, &FilePath::toString));
+                    emit m_instance->aboutToRemoveFiles(transform<QStringList>(removedFiles, &FilePath::toString));
                     removeFilesFromSnapshot(removedFiles);
                 }
             }
@@ -1570,10 +1559,10 @@ QFuture<void> CppModelManager::updateProjectInfo(const ProjectInfo::ConstPtr &ne
 
     // Announce removed project parts
     if (!removedProjectParts.isEmpty())
-        emit projectPartsRemoved(removedProjectParts);
+        emit m_instance->projectPartsRemoved(removedProjectParts);
 
     // Announce added project parts
-    emit projectPartsUpdated(project);
+    emit m_instance->projectPartsUpdated(project);
 
     // Ideally, we would update all the editor documents that depend on the 'filesToReindex'.
     // However, on e.g. a session restore first the editor documents are created and then the
@@ -1588,25 +1577,25 @@ QFuture<void> CppModelManager::updateProjectInfo(const ProjectInfo::ConstPtr &ne
 
     // It's safe to do this here, as only the UI thread writes to the map and no other thread
     // uses the indexer value.
-    d->setupWatcher(indexingFuture, project, projectData, this);
+    d->setupWatcher(indexingFuture, project, projectData, m_instance);
 
     return indexingFuture;
 }
 
-ProjectPart::ConstPtr CppModelManager::projectPartForId(const QString &projectPartId) const
+ProjectPart::ConstPtr CppModelManager::projectPartForId(const QString &projectPartId)
 {
     QReadLocker locker(&d->m_projectLock);
     return d->m_projectPartIdToProjectProjectPart.value(projectPartId);
 }
 
-QList<ProjectPart::ConstPtr> CppModelManager::projectPart(const FilePath &fileName) const
+QList<ProjectPart::ConstPtr> CppModelManager::projectPart(const FilePath &fileName)
 {
     QReadLocker locker(&d->m_projectLock);
     return d->m_fileToProjectParts.value(fileName.canonicalPath());
 }
 
 QList<ProjectPart::ConstPtr> CppModelManager::projectPartFromDependencies(
-        const FilePath &fileName) const
+        const FilePath &fileName)
 {
     QSet<ProjectPart::ConstPtr> parts;
     const FilePaths deps = snapshot().filesDependingOn(fileName);
@@ -1631,10 +1620,10 @@ bool CppModelManager::isCppEditor(IEditor *editor)
 
 bool CppModelManager::usesClangd(const TextEditor::TextDocument *document)
 {
-    return instance()->d->m_activeModelManagerSupport->usesClangd(document);
+    return d->m_activeModelManagerSupport->usesClangd(document);
 }
 
-bool CppModelManager::isClangCodeModelActive() const
+bool CppModelManager::isClangCodeModelActive()
 {
     return d->m_activeModelManagerSupport != &d->m_builtinModelManagerSupport;
 }
@@ -1642,19 +1631,19 @@ bool CppModelManager::isClangCodeModelActive() const
 void CppModelManager::emitDocumentUpdated(Document::Ptr doc)
 {
     if (replaceDocument(doc))
-        emit documentUpdated(doc);
+        emit m_instance->documentUpdated(doc);
 }
 
 void CppModelManager::emitAbstractEditorSupportContentsUpdated(const QString &filePath,
                                                                const QString &sourcePath,
                                                                const QByteArray &contents)
 {
-    emit abstractEditorSupportContentsUpdated(filePath, sourcePath, contents);
+    emit m_instance->abstractEditorSupportContentsUpdated(filePath, sourcePath, contents);
 }
 
 void CppModelManager::emitAbstractEditorSupportRemoved(const QString &filePath)
 {
-    emit abstractEditorSupportRemoved(filePath);
+    emit m_instance->abstractEditorSupportRemoved(filePath);
 }
 
 void CppModelManager::onProjectAdded(Project *)
@@ -1694,7 +1683,7 @@ void CppModelManager::onAboutToRemoveProject(Project *project)
     }
 
     if (!idsOfRemovedProjectParts.isEmpty())
-        emit projectPartsRemoved(idsOfRemovedProjectParts);
+        emit m_instance->projectPartsRemoved(idsOfRemovedProjectParts);
 
     delayedGC();
 }
@@ -1713,7 +1702,7 @@ void CppModelManager::onActiveProjectChanged(Project *project)
     updateCppEditorDocuments();
 }
 
-void CppModelManager::onSourceFilesRefreshed() const
+void CppModelManager::onSourceFilesRefreshed()
 {
     if (CppIndexingSupport::isFindErrorsIndexingActive()) {
         QTimer::singleShot(1, QCoreApplication::instance(), &QCoreApplication::quit);
@@ -1745,10 +1734,10 @@ void CppModelManager::onAboutToLoadSession()
     GC();
 }
 
-QSet<QString> CppModelManager::dependingInternalTargets(const FilePath &file) const
+QSet<QString> CppModelManager::dependingInternalTargets(const FilePath &file)
 {
     QSet<QString> result;
-    const Snapshot snapshot = this->snapshot();
+    const Snapshot snapshot = CppModelManager::snapshot();
     QTC_ASSERT(snapshot.contains(file), return result);
     bool wasHeader;
     const FilePath correspondingFile
@@ -1762,8 +1751,10 @@ QSet<QString> CppModelManager::dependingInternalTargets(const FilePath &file) co
     return result;
 }
 
-QSet<QString> CppModelManager::internalTargets(const FilePath &filePath) const
+QSet<QString> CppModelManager::internalTargets(const FilePath &filePath)
 {
+    QTC_ASSERT(m_instance, return {});
+
     const QList<ProjectPart::ConstPtr> projectParts = projectPart(filePath);
     // if we have no project parts it's most likely a header with declarations only and CMake based
     if (projectParts.isEmpty())
@@ -1931,7 +1922,7 @@ void CppModelManager::setupFallbackProjectPart()
         QMutexLocker locker(&d->m_fallbackProjectPartMutex);
         d->m_fallbackProjectPart = part;
     }
-    emit fallbackProjectPartUpdated();
+    emit m_instance->fallbackProjectPartUpdated();
 }
 
 void CppModelManager::GC()
@@ -1981,14 +1972,14 @@ void CppModelManager::GC()
     }
 
     // Announce removing files and replace the snapshot
-    emit aboutToRemoveFiles(notReachableFiles);
+    emit m_instance->aboutToRemoveFiles(notReachableFiles);
     replaceSnapshot(newSnapshot);
-    emit gcFinished();
+    emit m_instance->gcFinished();
 }
 
 void CppModelManager::finishedRefreshingSourceFiles(const QSet<QString> &files)
 {
-    emit sourceFilesRefreshed(files);
+    emit m_instance->sourceFilesRefreshed(files);
 }
 
 void CppModelManager::activateClangCodeModel(
@@ -1998,12 +1989,12 @@ void CppModelManager::activateClangCodeModel(
     d->m_activeModelManagerSupport = d->m_extendedModelManagerSupport.get();
 }
 
-CppCompletionAssistProvider *CppModelManager::completionAssistProvider() const
+CppCompletionAssistProvider *CppModelManager::completionAssistProvider()
 {
     return d->m_builtinModelManagerSupport.completionAssistProvider();
 }
 
-TextEditor::BaseHoverHandler *CppModelManager::createHoverHandler() const
+TextEditor::BaseHoverHandler *CppModelManager::createHoverHandler()
 {
     return d->m_builtinModelManagerSupport.createHoverHandler();
 }
@@ -2012,7 +2003,7 @@ void CppModelManager::followSymbol(const CursorInEditor &data,
                                    const LinkHandler &processLinkCallback,
                                    bool resolveTarget, bool inNextSplit, Backend backend)
 {
-    instance()->modelManagerSupport(backend)->followSymbol(data, processLinkCallback,
+    modelManagerSupport(backend)->followSymbol(data, processLinkCallback,
                                                            resolveTarget, inNextSplit);
 }
 
@@ -2020,7 +2011,7 @@ void CppModelManager::followSymbolToType(const CursorInEditor &data,
                                          const LinkHandler &processLinkCallback,
                                          bool inNextSplit, Backend backend)
 {
-    instance()->modelManagerSupport(backend)->followSymbolToType(data, processLinkCallback,
+    modelManagerSupport(backend)->followSymbolToType(data, processLinkCallback,
                                                                  inNextSplit);
 }
 
@@ -2028,11 +2019,11 @@ void CppModelManager::switchDeclDef(const CursorInEditor &data,
                                     const LinkHandler &processLinkCallback,
                                     Backend backend)
 {
-    instance()->modelManagerSupport(backend)->switchDeclDef(data, processLinkCallback);
+    modelManagerSupport(backend)->switchDeclDef(data, processLinkCallback);
 }
 
 BaseEditorDocumentProcessor *CppModelManager::createEditorDocumentProcessor(
-    TextEditor::TextDocument *baseTextDocument) const
+    TextEditor::TextDocument *baseTextDocument)
 {
     return d->m_activeModelManagerSupport->createEditorDocumentProcessor(baseTextDocument);
 }
@@ -2093,7 +2084,7 @@ bool CppModelManager::setExtraDiagnostics(const QString &fileName,
                                           const QList<Document::DiagnosticMessage> &diagnostics)
 {
     d->m_diagnosticMessages = diagnostics;
-    emit diagnosticsChanged(fileName, kind);
+    emit m_instance->diagnosticsChanged(fileName, kind);
     return true;
 }
 
diff --git a/src/plugins/cppeditor/cppmodelmanager.h b/src/plugins/cppeditor/cppmodelmanager.h
index 7dd49c6ebd1..6f6dc7298e3 100644
--- a/src/plugins/cppeditor/cppmodelmanager.h
+++ b/src/plugins/cppeditor/cppmodelmanager.h
@@ -80,95 +80,95 @@ public:
 
     static CppModelManager *instance();
 
-    void registerJsExtension();
+    static void registerJsExtension();
 
-     // Documented in source file.
-     enum ProgressNotificationMode {
+    // Documented in source file.
+    enum ProgressNotificationMode {
         ForcedProgressNotification,
         ReservedProgressNotification
     };
 
-    QFuture<void> updateSourceFiles(const QSet<Utils::FilePath> &sourceFiles,
-                                    ProgressNotificationMode mode = ReservedProgressNotification);
-    void updateCppEditorDocuments(bool projectsUpdated = false) const;
-    WorkingCopy workingCopy() const;
-    QByteArray codeModelConfiguration() const;
-    CppLocatorData *locatorData() const;
+    static QFuture<void> updateSourceFiles(const QSet<Utils::FilePath> &sourceFiles,
+                                            ProgressNotificationMode mode = ReservedProgressNotification);
+    static void updateCppEditorDocuments(bool projectsUpdated = false);
+    static WorkingCopy workingCopy();
+    static QByteArray codeModelConfiguration();
+    static CppLocatorData *locatorData();
 
-    bool setExtraDiagnostics(const QString &fileName,
-                             const QString &kind,
-                             const QList<Document::DiagnosticMessage> &diagnostics);
+    static bool setExtraDiagnostics(const QString &fileName,
+                                    const QString &kind,
+                                    const QList<Document::DiagnosticMessage> &diagnostics);
 
-    const QList<Document::DiagnosticMessage> diagnosticMessages();
+    static const QList<Document::DiagnosticMessage> diagnosticMessages();
 
-    ProjectInfoList projectInfos() const;
-    ProjectInfo::ConstPtr projectInfo(ProjectExplorer::Project *project) const;
-    QFuture<void> updateProjectInfo(const ProjectInfo::ConstPtr &newProjectInfo,
-                                    const QSet<Utils::FilePath> &additionalFiles = {});
+    static ProjectInfoList projectInfos();
+    static ProjectInfo::ConstPtr projectInfo(ProjectExplorer::Project *project);
+    static QFuture<void> updateProjectInfo(const ProjectInfo::ConstPtr &newProjectInfo,
+                                           const QSet<Utils::FilePath> &additionalFiles = {});
 
     /// \return The project part with the given project file
-    ProjectPart::ConstPtr projectPartForId(const QString &projectPartId) const;
+    static ProjectPart::ConstPtr projectPartForId(const QString &projectPartId);
     /// \return All project parts that mention the given file name as one of the sources/headers.
-    QList<ProjectPart::ConstPtr> projectPart(const Utils::FilePath &fileName) const;
-    QList<ProjectPart::ConstPtr> projectPart(const QString &fileName) const
+    static QList<ProjectPart::ConstPtr> projectPart(const Utils::FilePath &fileName);
+    static QList<ProjectPart::ConstPtr> projectPart(const QString &fileName)
     { return projectPart(Utils::FilePath::fromString(fileName)); }
     /// This is a fall-back function: find all files that includes the file directly or indirectly,
     /// and return its \c ProjectPart list for use with this file.
-    QList<ProjectPart::ConstPtr> projectPartFromDependencies(const Utils::FilePath &fileName) const;
+    static QList<ProjectPart::ConstPtr> projectPartFromDependencies(const Utils::FilePath &fileName);
     /// \return A synthetic \c ProjectPart which consists of all defines/includes/frameworks from
     ///         all loaded projects.
-    ProjectPart::ConstPtr fallbackProjectPart();
+    static ProjectPart::ConstPtr fallbackProjectPart();
 
-    CPlusPlus::Snapshot snapshot() const;
-    Document::Ptr document(const Utils::FilePath &filePath) const;
-    bool replaceDocument(Document::Ptr newDoc);
+    static CPlusPlus::Snapshot snapshot();
+    static Document::Ptr document(const Utils::FilePath &filePath);
+    static bool replaceDocument(Document::Ptr newDoc);
 
-    void emitDocumentUpdated(Document::Ptr doc);
-    void emitAbstractEditorSupportContentsUpdated(const QString &filePath,
+    static void emitDocumentUpdated(Document::Ptr doc);
+    static void emitAbstractEditorSupportContentsUpdated(const QString &filePath,
                                                   const QString &sourcePath,
                                                   const QByteArray &contents);
-    void emitAbstractEditorSupportRemoved(const QString &filePath);
+    static void emitAbstractEditorSupportRemoved(const QString &filePath);
 
     static bool isCppEditor(Core::IEditor *editor);
     static bool usesClangd(const TextEditor::TextDocument *document);
-    bool isClangCodeModelActive() const;
+    static bool isClangCodeModelActive();
 
-    QSet<AbstractEditorSupport*> abstractEditorSupports() const;
-    void addExtraEditorSupport(AbstractEditorSupport *editorSupport);
-    void removeExtraEditorSupport(AbstractEditorSupport *editorSupport);
+    static QSet<AbstractEditorSupport*> abstractEditorSupports();
+    static void addExtraEditorSupport(AbstractEditorSupport *editorSupport);
+    static void removeExtraEditorSupport(AbstractEditorSupport *editorSupport);
 
-    const QList<CppEditorDocumentHandle *> cppEditorDocuments() const;
-    CppEditorDocumentHandle *cppEditorDocument(const Utils::FilePath &filePath) const;
+    static const QList<CppEditorDocumentHandle *> cppEditorDocuments();
+    static CppEditorDocumentHandle *cppEditorDocument(const Utils::FilePath &filePath);
     static BaseEditorDocumentProcessor *cppEditorDocumentProcessor(const Utils::FilePath &filePath);
-    void registerCppEditorDocument(CppEditorDocumentHandle *cppEditorDocument);
-    void unregisterCppEditorDocument(const QString &filePath);
-
-    QList<int> references(CPlusPlus::Symbol *symbol, const CPlusPlus::LookupContext &context);
-
-    SignalSlotType getSignalSlotType(const Utils::FilePath &filePath,
-                                     const QByteArray &content,
-                                     int position) const;
-
-    void renameUsages(CPlusPlus::Symbol *symbol, const CPlusPlus::LookupContext &context,
-                      const QString &replacement = QString(),
-                      const std::function<void()> &callback = {});
-    void renameUsages(const CPlusPlus::Document::Ptr &doc,
-                      const QTextCursor &cursor,
-                      const CPlusPlus::Snapshot &snapshot,
-                      const QString &replacement,
-                      const std::function<void()> &callback);
-    void findUsages(CPlusPlus::Symbol *symbol, const CPlusPlus::LookupContext &context);
-
-    void findMacroUsages(const CPlusPlus::Macro &macro);
-    void renameMacroUsages(const CPlusPlus::Macro &macro, const QString &replacement);
-
-    void finishedRefreshingSourceFiles(const QSet<QString> &files);
-
-    void activateClangCodeModel(std::unique_ptr<ModelManagerSupport> &&modelManagerSupport);
-    CppCompletionAssistProvider *completionAssistProvider() const;
-    BaseEditorDocumentProcessor *createEditorDocumentProcessor(
-                    TextEditor::TextDocument *baseTextDocument) const;
-    TextEditor::BaseHoverHandler *createHoverHandler() const;
+    static void registerCppEditorDocument(CppEditorDocumentHandle *cppEditorDocument);
+    static void unregisterCppEditorDocument(const QString &filePath);
+
+    static QList<int> references(CPlusPlus::Symbol *symbol, const CPlusPlus::LookupContext &context);
+
+    static SignalSlotType getSignalSlotType(const Utils::FilePath &filePath,
+                                            const QByteArray &content,
+                                            int position);
+
+    static void renameUsages(CPlusPlus::Symbol *symbol, const CPlusPlus::LookupContext &context,
+                             const QString &replacement = QString(),
+                             const std::function<void()> &callback = {});
+    static void renameUsages(const CPlusPlus::Document::Ptr &doc,
+                             const QTextCursor &cursor,
+                             const CPlusPlus::Snapshot &snapshot,
+                             const QString &replacement,
+                             const std::function<void()> &callback);
+    static void findUsages(CPlusPlus::Symbol *symbol, const CPlusPlus::LookupContext &context);
+
+    static void findMacroUsages(const CPlusPlus::Macro &macro);
+    static void renameMacroUsages(const CPlusPlus::Macro &macro, const QString &replacement);
+
+    static void finishedRefreshingSourceFiles(const QSet<QString> &files);
+
+    static void activateClangCodeModel(std::unique_ptr<ModelManagerSupport> &&modelManagerSupport);
+    static CppCompletionAssistProvider *completionAssistProvider();
+    static BaseEditorDocumentProcessor *createEditorDocumentProcessor(
+                    TextEditor::TextDocument *baseTextDocument);
+    static TextEditor::BaseHoverHandler *createHoverHandler();
     static FollowSymbolUnderCursor &builtinFollowSymbol();
 
     enum class Backend { Builtin, Best };
@@ -196,22 +196,22 @@ public:
                                      const CPlusPlus::LookupContext &context,
                                      const Utils::LinkHandler &callback);
 
-    CppIndexingSupport *indexingSupport();
+    static CppIndexingSupport *indexingSupport();
 
-    Utils::FilePaths projectFiles();
+    static Utils::FilePaths projectFiles();
 
-    ProjectExplorer::HeaderPaths headerPaths();
+    static ProjectExplorer::HeaderPaths headerPaths();
 
     // Use this *only* for auto tests
-    void setHeaderPaths(const ProjectExplorer::HeaderPaths &headerPaths);
+    static void setHeaderPaths(const ProjectExplorer::HeaderPaths &headerPaths);
 
-    ProjectExplorer::Macros definedMacros();
+    static ProjectExplorer::Macros definedMacros();
 
-    void enableGarbageCollector(bool enable);
+    static void enableGarbageCollector(bool enable);
 
-    SymbolFinder *symbolFinder();
+    static SymbolFinder *symbolFinder();
 
-    QThreadPool *sharedThreadPool();
+    static QThreadPool *sharedThreadPool();
 
     static QSet<Utils::FilePath> timeStampModifiedFiles(const QList<Document::Ptr> &documentsToCheck);
 
@@ -219,34 +219,34 @@ public:
     static const Utils::FilePath &configurationFileName();
     static const Utils::FilePath &editorConfigurationFileName();
 
-    void setLocatorFilter(std::unique_ptr<Core::ILocatorFilter> &&filter);
-    void setClassesFilter(std::unique_ptr<Core::ILocatorFilter> &&filter);
-    void setIncludesFilter(std::unique_ptr<Core::ILocatorFilter> &&filter);
-    void setFunctionsFilter(std::unique_ptr<Core::ILocatorFilter> &&filter);
-    void setSymbolsFindFilter(std::unique_ptr<Core::IFindFilter> &&filter);
-    void setCurrentDocumentFilter(std::unique_ptr<Core::ILocatorFilter> &&filter);
+    static void setLocatorFilter(std::unique_ptr<Core::ILocatorFilter> &&filter);
+    static void setClassesFilter(std::unique_ptr<Core::ILocatorFilter> &&filter);
+    static void setIncludesFilter(std::unique_ptr<Core::ILocatorFilter> &&filter);
+    static void setFunctionsFilter(std::unique_ptr<Core::ILocatorFilter> &&filter);
+    static void setSymbolsFindFilter(std::unique_ptr<Core::IFindFilter> &&filter);
+    static void setCurrentDocumentFilter(std::unique_ptr<Core::ILocatorFilter> &&filter);
 
-    Core::ILocatorFilter *locatorFilter() const;
-    Core::ILocatorFilter *classesFilter() const;
-    Core::ILocatorFilter *includesFilter() const;
-    Core::ILocatorFilter *functionsFilter() const;
-    Core::IFindFilter *symbolsFindFilter() const;
-    Core::ILocatorFilter *currentDocumentFilter() const;
+    static Core::ILocatorFilter *locatorFilter();
+    static Core::ILocatorFilter *classesFilter();
+    static Core::ILocatorFilter *includesFilter();
+    static Core::ILocatorFilter *functionsFilter();
+    static Core::IFindFilter *symbolsFindFilter();
+    static Core::ILocatorFilter *currentDocumentFilter();
 
     /*
      * try to find build system target that depends on the given file - if the file is no header
      * try to find the corresponding header and use this instead to find the respective target
      */
-    QSet<QString> dependingInternalTargets(const Utils::FilePath &file) const;
+    static QSet<QString> dependingInternalTargets(const Utils::FilePath &file);
 
-    QSet<QString> internalTargets(const Utils::FilePath &filePath) const;
+    static QSet<QString> internalTargets(const Utils::FilePath &filePath);
 
-    void renameIncludes(const Utils::FilePath &oldFilePath, const Utils::FilePath &newFilePath);
+    static void renameIncludes(const Utils::FilePath &oldFilePath, const Utils::FilePath &newFilePath);
 
     // for VcsBaseSubmitEditor
     Q_INVOKABLE QSet<QString> symbolsInFiles(const QSet<Utils::FilePath> &files) const;
 
-    ModelManagerSupport *modelManagerSupport(Backend backend) const;
+    static ModelManagerSupport *modelManagerSupport(Backend backend);
 
 signals:
     /// Project data might be locked while this is emitted.
@@ -271,40 +271,37 @@ signals:
     void diagnosticsChanged(const QString &fileName, const QString &kind);
 
 public slots:
-    void updateModifiedSourceFiles();
-    void GC();
+    static void updateModifiedSourceFiles();
+    static void GC();
 
 private:
     // This should be executed in the GUI thread.
     friend class Tests::ModelManagerTestHelper;
-    void onAboutToLoadSession();
-    void onProjectAdded(ProjectExplorer::Project *project);
-    void onAboutToRemoveProject(ProjectExplorer::Project *project);
-    void onActiveProjectChanged(ProjectExplorer::Project *project);
-    void onSourceFilesRefreshed() const;
-    void onCurrentEditorChanged(Core::IEditor *editor);
-    void onCoreAboutToClose();
-    void setupFallbackProjectPart();
-
-    void delayedGC();
-    void recalculateProjectPartMappings();
-
-    void replaceSnapshot(const CPlusPlus::Snapshot &newSnapshot);
-    void removeFilesFromSnapshot(const QSet<Utils::FilePath> &removedFiles);
-    void removeProjectInfoFilesAndIncludesFromSnapshot(const ProjectInfo &projectInfo);
-
-    WorkingCopy buildWorkingCopyList();
-
-    void ensureUpdated();
-    Utils::FilePaths internalProjectFiles() const;
-    ProjectExplorer::HeaderPaths internalHeaderPaths() const;
-    ProjectExplorer::Macros internalDefinedMacros() const;
-
-    void dumpModelManagerConfiguration(const QString &logFileId);
-    void initCppTools();
-
-private:
-    Internal::CppModelManagerPrivate *d;
+    static void onAboutToLoadSession();
+    static void onProjectAdded(ProjectExplorer::Project *project);
+    static void onAboutToRemoveProject(ProjectExplorer::Project *project);
+    static void onActiveProjectChanged(ProjectExplorer::Project *project);
+    static void onSourceFilesRefreshed();
+    static void onCurrentEditorChanged(Core::IEditor *editor);
+    static void onCoreAboutToClose();
+    static void setupFallbackProjectPart();
+
+    static void delayedGC();
+    static void recalculateProjectPartMappings();
+
+    static void replaceSnapshot(const CPlusPlus::Snapshot &newSnapshot);
+    static void removeFilesFromSnapshot(const QSet<Utils::FilePath> &removedFiles);
+    static void removeProjectInfoFilesAndIncludesFromSnapshot(const ProjectInfo &projectInfo);
+
+    static WorkingCopy buildWorkingCopyList();
+
+    static void ensureUpdated();
+    static Utils::FilePaths internalProjectFiles();
+    static ProjectExplorer::HeaderPaths internalHeaderPaths();
+    static ProjectExplorer::Macros internalDefinedMacros();
+
+    static void dumpModelManagerConfiguration(const QString &logFileId);
+    static void initCppTools();
 };
 
 } // CppEditor
diff --git a/src/plugins/cppeditor/cppmodelmanager_test.cpp b/src/plugins/cppeditor/cppmodelmanager_test.cpp
index cb292293e44..c2a9189fd63 100644
--- a/src/plugins/cppeditor/cppmodelmanager_test.cpp
+++ b/src/plugins/cppeditor/cppmodelmanager_test.cpp
@@ -164,7 +164,7 @@ private:
 
 static ProjectPart::ConstPtr projectPartOfEditorDocument(const FilePath &filePath)
 {
-    auto *editorDocument = CppModelManager::instance()->cppEditorDocument(filePath);
+    auto *editorDocument = CppModelManager::cppEditorDocument(filePath);
     QTC_ASSERT(editorDocument, return ProjectPart::ConstPtr());
     return editorDocument->processor()->parser()->projectPartInfo().projectPart;
 }
@@ -173,7 +173,6 @@ static ProjectPart::ConstPtr projectPartOfEditorDocument(const FilePath &filePat
 void ModelManagerTest::testPathsAreClean()
 {
     ModelManagerTestHelper helper;
-    CppModelManager *mm = CppModelManager::instance();
 
     const MyTestDataDir testDataDir(_("testdata"));
 
@@ -188,9 +187,9 @@ void ModelManagerTest::testPathsAreClean()
     const auto pi = ProjectInfo::create(ProjectUpdateInfo(project, KitInfo(nullptr), {}, {}),
                                         {part});
 
-    mm->updateProjectInfo(pi);
+    CppModelManager::updateProjectInfo(pi);
 
-    ProjectExplorer::HeaderPaths headerPaths = mm->headerPaths();
+    ProjectExplorer::HeaderPaths headerPaths = CppModelManager::headerPaths();
     QCOMPARE(headerPaths.size(), 2);
     QVERIFY(headerPaths.contains(HeaderPath::makeUser(testDataDir.includeDir())));
     QVERIFY(headerPaths.contains(HeaderPath::makeFramework(testDataDir.frameworksDir())));
@@ -203,7 +202,6 @@ void ModelManagerTest::testFrameworkHeaders()
         QSKIP("Can't resolve framework soft links on Windows.");
 
     ModelManagerTestHelper helper;
-    CppModelManager *mm = CppModelManager::instance();
 
     const MyTestDataDir testDataDir(_("testdata"));
 
@@ -221,11 +219,11 @@ void ModelManagerTest::testFrameworkHeaders()
     const auto pi = ProjectInfo::create(ProjectUpdateInfo(project, KitInfo(nullptr), {}, {}),
                                         {part});
 
-    mm->updateProjectInfo(pi).waitForFinished();
+    CppModelManager::updateProjectInfo(pi).waitForFinished();
     QCoreApplication::processEvents();
 
-    QVERIFY(mm->snapshot().contains(source));
-    Document::Ptr doc = mm->document(source);
+    QVERIFY(CppModelManager::snapshot().contains(source));
+    Document::Ptr doc = CppModelManager::document(source);
     QVERIFY(!doc.isNull());
     CPlusPlus::Namespace *ns = doc->globalNamespace();
     QVERIFY(ns);
@@ -247,7 +245,6 @@ void ModelManagerTest::testFrameworkHeaders()
 void ModelManagerTest::testRefreshAlsoIncludesOfProjectFiles()
 {
     ModelManagerTestHelper helper;
-    CppModelManager *mm = CppModelManager::instance();
 
     const MyTestDataDir testDataDir(_("testdata"));
 
@@ -268,7 +265,7 @@ void ModelManagerTest::testRefreshAlsoIncludesOfProjectFiles()
     QSet<FilePath> refreshedFiles = helper.updateProjectInfo(pi);
     QCOMPARE(refreshedFiles.size(), 1);
     QVERIFY(refreshedFiles.contains(testCpp));
-    CPlusPlus::Snapshot snapshot = mm->snapshot();
+    CPlusPlus::Snapshot snapshot = CppModelManager::snapshot();
     QVERIFY(snapshot.contains(testHeader));
     QVERIFY(snapshot.contains(testCpp));
 
@@ -287,7 +284,7 @@ void ModelManagerTest::testRefreshAlsoIncludesOfProjectFiles()
 
     QCOMPARE(refreshedFiles.size(), 1);
     QVERIFY(refreshedFiles.contains(testCpp));
-    snapshot = mm->snapshot();
+    snapshot = CppModelManager::snapshot();
     QVERIFY(snapshot.contains(testHeader));
     QVERIFY(snapshot.contains(testCpp));
 
@@ -304,7 +301,6 @@ void ModelManagerTest::testRefreshAlsoIncludesOfProjectFiles()
 void ModelManagerTest::testRefreshSeveralTimes()
 {
     ModelManagerTestHelper helper;
-    CppModelManager *mm = CppModelManager::instance();
 
     const MyTestDataDir testDataDir(_("testdata_refresh"));
 
@@ -323,7 +319,7 @@ void ModelManagerTest::testRefreshSeveralTimes()
     };
     const auto part = ProjectPart::create(project->projectFilePath(), rpp, {}, files);
     auto pi = ProjectInfo::create(ProjectUpdateInfo(project, KitInfo(nullptr), {}, {}), {part});
-    mm->updateProjectInfo(pi);
+    CppModelManager::updateProjectInfo(pi);
 
     CPlusPlus::Snapshot snapshot;
     QSet<FilePath> refreshedFiles;
@@ -344,7 +340,7 @@ void ModelManagerTest::testRefreshSeveralTimes()
         QVERIFY(refreshedFiles.contains(testHeader2));
         QVERIFY(refreshedFiles.contains(testCpp));
 
-        snapshot = mm->snapshot();
+        snapshot = CppModelManager::snapshot();
         QVERIFY(snapshot.contains(testHeader1));
         QVERIFY(snapshot.contains(testHeader2));
         QVERIFY(snapshot.contains(testCpp));
@@ -366,7 +362,6 @@ void ModelManagerTest::testRefreshSeveralTimes()
 void ModelManagerTest::testRefreshTestForChanges()
 {
     ModelManagerTestHelper helper;
-    CppModelManager *mm = CppModelManager::instance();
 
     const MyTestDataDir testDataDir(_("testdata_refresh"));
     const FilePath testCpp = testDataDir.filePath("source.cpp");
@@ -381,7 +376,7 @@ void ModelManagerTest::testRefreshTestForChanges()
 
     // Reindexing triggers a reparsing thread
     helper.resetRefreshedSourceFiles();
-    QFuture<void> firstFuture = mm->updateProjectInfo(pi);
+    QFuture<void> firstFuture = CppModelManager::updateProjectInfo(pi);
     QVERIFY(firstFuture.isStarted() || firstFuture.isRunning());
     firstFuture.waitForFinished();
     const QSet<FilePath> refreshedFiles = helper.waitForRefreshedSourceFiles();
@@ -389,7 +384,7 @@ void ModelManagerTest::testRefreshTestForChanges()
     QVERIFY(refreshedFiles.contains(testCpp));
 
     // No reindexing since nothing has changed
-    QFuture<void> subsequentFuture = mm->updateProjectInfo(pi);
+    QFuture<void> subsequentFuture = CppModelManager::updateProjectInfo(pi);
     QVERIFY(subsequentFuture.isCanceled() && subsequentFuture.isFinished());
 }
 
@@ -398,7 +393,6 @@ void ModelManagerTest::testRefreshTestForChanges()
 void ModelManagerTest::testRefreshAddedAndPurgeRemoved()
 {
     ModelManagerTestHelper helper;
-    CppModelManager *mm = CppModelManager::instance();
 
     const MyTestDataDir testDataDir(_("testdata_refresh"));
 
@@ -424,7 +418,7 @@ void ModelManagerTest::testRefreshAddedAndPurgeRemoved()
     QVERIFY(refreshedFiles.contains(testHeader1));
     QVERIFY(refreshedFiles.contains(testCpp));
 
-    snapshot = mm->snapshot();
+    snapshot = CppModelManager::snapshot();
     QVERIFY(snapshot.contains(testHeader1));
     QVERIFY(snapshot.contains(testCpp));
 
@@ -440,7 +434,7 @@ void ModelManagerTest::testRefreshAddedAndPurgeRemoved()
     QCOMPARE(refreshedFiles.size(), 1);
     QVERIFY(refreshedFiles.contains(testHeader2));
 
-    snapshot = mm->snapshot();
+    snapshot = CppModelManager::snapshot();
     QVERIFY(snapshot.contains(testHeader2));
     QVERIFY(snapshot.contains(testCpp));
     // The removed project file is not anymore in the snapshot
@@ -461,7 +455,6 @@ void ModelManagerTest::testRefreshTimeStampModifiedIfSourcefilesChange()
     const FilePaths finalProjectFilePaths = toAbsolutePaths(finalProjectFiles, temporaryDir);
 
     ModelManagerTestHelper helper;
-    CppModelManager *mm = CppModelManager::instance();
 
     const auto project = helper.createProject(_("test_modelmanager_refresh_timeStampModified"),
                                               FilePath::fromString("blubb.pro"));
@@ -480,7 +473,7 @@ void ModelManagerTest::testRefreshTimeStampModifiedIfSourcefilesChange()
     refreshedFiles = helper.updateProjectInfo(pi);
 
     QCOMPARE(refreshedFiles.size(), initialProjectFilePaths.size());
-    snapshot = mm->snapshot();
+    snapshot = CppModelManager::snapshot();
     for (const FilePath &file : initialProjectFilePaths) {
         QVERIFY(refreshedFiles.contains(file));
         QVERIFY(snapshot.contains(file));
@@ -509,7 +502,7 @@ void ModelManagerTest::testRefreshTimeStampModifiedIfSourcefilesChange()
     refreshedFiles = helper.updateProjectInfo(pi);
 
     QCOMPARE(refreshedFiles.size(), finalProjectFilePaths.size());
-    snapshot = mm->snapshot();
+    snapshot = CppModelManager::snapshot();
     for (const FilePath &file : finalProjectFilePaths) {
         QVERIFY(refreshedFiles.contains(file));
         QVERIFY(snapshot.contains(file));
@@ -550,7 +543,6 @@ void ModelManagerTest::testSnapshotAfterTwoProjects()
     ModelManagerTestHelper helper;
     ProjectCreator project1(&helper);
     ProjectCreator project2(&helper);
-    CppModelManager *mm = CppModelManager::instance();
 
     // Project 1
     project1.create(_("test_modelmanager_snapshot_after_two_projects.1"),
@@ -559,10 +551,10 @@ void ModelManagerTest::testSnapshotAfterTwoProjects()
 
     refreshedFiles = helper.updateProjectInfo(project1.projectInfo);
     QCOMPARE(refreshedFiles, Utils::toSet(project1.projectFiles));
-    const int snapshotSizeAfterProject1 = mm->snapshot().size();
+    const int snapshotSizeAfterProject1 = CppModelManager::snapshot().size();
 
     for (const FilePath &file : std::as_const(project1.projectFiles))
-        QVERIFY(mm->snapshot().contains(file));
+        QVERIFY(CppModelManager::snapshot().contains(file));
 
     // Project 2
     project2.create(_("test_modelmanager_snapshot_after_two_projects.2"),
@@ -572,14 +564,14 @@ void ModelManagerTest::testSnapshotAfterTwoProjects()
     refreshedFiles = helper.updateProjectInfo(project2.projectInfo);
     QCOMPARE(refreshedFiles, Utils::toSet(project2.projectFiles));
 
-    const int snapshotSizeAfterProject2 = mm->snapshot().size();
+    const int snapshotSizeAfterProject2 = CppModelManager::snapshot().size();
     QVERIFY(snapshotSizeAfterProject2 > snapshotSizeAfterProject1);
     QVERIFY(snapshotSizeAfterProject2 >= snapshotSizeAfterProject1 + project2.projectFiles.size());
 
     for (const FilePath &file : std::as_const(project1.projectFiles))
-        QVERIFY(mm->snapshot().contains(file));
+        QVERIFY(CppModelManager::snapshot().contains(file));
     for (const FilePath &file : std::as_const(project2.projectFiles))
-        QVERIFY(mm->snapshot().contains(file));
+        QVERIFY(CppModelManager::snapshot().contains(file));
 }
 
 /// Check: (1) For a project with a *.ui file an AbstractEditorSupport object
@@ -601,10 +593,9 @@ void ModelManagerTest::testExtraeditorsupportUiFiles()
 
     // Check working copy.
     // An AbstractEditorSupport object should have been added for the ui_* file.
-    CppModelManager *mm = CppModelManager::instance();
-    WorkingCopy workingCopy = mm->workingCopy();
+    WorkingCopy workingCopy = CppModelManager::workingCopy();
 
-    QCOMPARE(workingCopy.size(), 2); // mm->configurationFileName() and "ui_*.h"
+    QCOMPARE(workingCopy.size(), 2); // CppModelManager::configurationFileName() and "ui_*.h"
 
     QStringList fileNamesInWorkinCopy;
     const WorkingCopy::Table &elements = workingCopy.elements();
@@ -613,16 +604,16 @@ void ModelManagerTest::testExtraeditorsupportUiFiles()
 
     fileNamesInWorkinCopy.sort();
     const QString expectedUiHeaderFileName = _("ui_mainwindow.h");
-    QCOMPARE(fileNamesInWorkinCopy.at(0), mm->configurationFileName().toString());
+    QCOMPARE(fileNamesInWorkinCopy.at(0), CppModelManager::configurationFileName().toString());
     QCOMPARE(fileNamesInWorkinCopy.at(1), expectedUiHeaderFileName);
 
     // Check CppSourceProcessor / includes.
     // The CppSourceProcessor is expected to find the ui_* file in the working copy.
     const FilePath fileIncludingTheUiFile = temporaryDir.absolutePath("mainwindow.cpp");
-    while (!mm->snapshot().document(fileIncludingTheUiFile))
+    while (!CppModelManager::snapshot().document(fileIncludingTheUiFile))
         QCoreApplication::processEvents();
 
-    const CPlusPlus::Snapshot snapshot = mm->snapshot();
+    const CPlusPlus::Snapshot snapshot = CppModelManager::snapshot();
     const Document::Ptr document = snapshot.document(fileIncludingTheUiFile);
     QVERIFY(document);
     const FilePaths includedFiles = document->includedFiles();
@@ -640,7 +631,6 @@ void ModelManagerTest::testGcIfLastCppeditorClosed()
     MyTestDataDir testDataDirectory(_("testdata_guiproject1"));
     const FilePath file = testDataDirectory.filePath("main.cpp");
 
-    CppModelManager *mm = CppModelManager::instance();
     helper.resetRefreshedSourceFiles();
 
     // Open a file in the editor
@@ -648,8 +638,8 @@ void ModelManagerTest::testGcIfLastCppeditorClosed()
     Core::IEditor *editor = Core::EditorManager::openEditor(file);
     QVERIFY(editor);
     QCOMPARE(Core::DocumentModel::openedDocuments().size(), 1);
-    QVERIFY(mm->isCppEditor(editor));
-    QVERIFY(mm->workingCopy().get(file));
+    QVERIFY(CppModelManager::isCppEditor(editor));
+    QVERIFY(CppModelManager::workingCopy().get(file));
 
     // Wait until the file is refreshed
     helper.waitForRefreshedSourceFiles();
@@ -659,8 +649,8 @@ void ModelManagerTest::testGcIfLastCppeditorClosed()
     helper.waitForFinishedGc();
 
     // Check: File is removed from the snapshpt
-    QVERIFY(!mm->workingCopy().get(file));
-    QVERIFY(!mm->snapshot().contains(file));
+    QVERIFY(!CppModelManager::workingCopy().get(file));
+    QVERIFY(!CppModelManager::snapshot().contains(file));
 }
 
 /// Check: Files that are open in the editor are not garbage collected.
@@ -671,7 +661,6 @@ void ModelManagerTest::testDontGcOpenedFiles()
     MyTestDataDir testDataDirectory(_("testdata_guiproject1"));
     const FilePath file = testDataDirectory.filePath("main.cpp");
 
-    CppModelManager *mm = CppModelManager::instance();
     helper.resetRefreshedSourceFiles();
 
     // Open a file in the editor
@@ -679,24 +668,24 @@ void ModelManagerTest::testDontGcOpenedFiles()
     Core::IEditor *editor = Core::EditorManager::openEditor(file);
     QVERIFY(editor);
     QCOMPARE(Core::DocumentModel::openedDocuments().size(), 1);
-    QVERIFY(mm->isCppEditor(editor));
+    QVERIFY(CppModelManager::isCppEditor(editor));
 
     // Wait until the file is refreshed and check whether it is in the working copy
     helper.waitForRefreshedSourceFiles();
 
-    QVERIFY(mm->workingCopy().get(file));
+    QVERIFY(CppModelManager::workingCopy().get(file));
 
     // Run the garbage collector
-    mm->GC();
+    CppModelManager::GC();
 
     // Check: File is still there
-    QVERIFY(mm->workingCopy().get(file));
-    QVERIFY(mm->snapshot().contains(file));
+    QVERIFY(CppModelManager::workingCopy().get(file));
+    QVERIFY(CppModelManager::snapshot().contains(file));
 
     // Close editor
     Core::EditorManager::closeDocuments({editor->document()});
     helper.waitForFinishedGc();
-    QVERIFY(mm->snapshot().isEmpty());
+    QVERIFY(CppModelManager::snapshot().isEmpty());
 }
 
 namespace {
@@ -735,8 +724,6 @@ void ModelManagerTest::testDefinesPerProject()
     const FilePath main2File = testDataDirectory.filePath("main2.cpp");
     const FilePath header = testDataDirectory.filePath("header.h");
 
-    CppModelManager *mm = CppModelManager::instance();
-
     const auto project = helper.createProject(_("test_modelmanager_defines_per_project"),
                                               Utils::FilePath::fromString("blubb.pro"));
 
@@ -758,7 +745,7 @@ void ModelManagerTest::testDefinesPerProject()
 
     const auto pi = ProjectInfo::create({project, KitInfo(nullptr), {}, {}}, {part1, part2});
     helper.updateProjectInfo(pi);
-    QCOMPARE(mm->snapshot().size(), 4);
+    QCOMPARE(CppModelManager::snapshot().size(), 4);
 
     // Open a file in the editor
     QCOMPARE(Core::DocumentModel::openedDocuments().size(), 0);
@@ -778,9 +765,9 @@ void ModelManagerTest::testDefinesPerProject()
         EditorCloser closer(editor);
         QVERIFY(editor);
         QCOMPARE(Core::DocumentModel::openedDocuments().size(), 1);
-        QVERIFY(mm->isCppEditor(editor));
+        QVERIFY(CppModelManager::isCppEditor(editor));
 
-        Document::Ptr doc = mm->document(i.filePath);
+        Document::Ptr doc = CppModelManager::document(i.filePath);
         QCOMPARE(nameOfFirstDeclaration(doc), firstDeclarationName);
     }
 }
@@ -796,8 +783,6 @@ void ModelManagerTest::testPrecompiledHeaders()
     const FilePath pch1File = testDataDirectory.filePath("pch1.h");
     const FilePath pch2File = testDataDirectory.filePath("pch2.h");
 
-    CppModelManager *mm = CppModelManager::instance();
-
     const auto project = helper.createProject(_("test_modelmanager_defines_per_project_pch"),
                                               Utils::FilePath::fromString("blubb.pro"));
 
@@ -820,7 +805,7 @@ void ModelManagerTest::testPrecompiledHeaders()
     const auto pi = ProjectInfo::create({project, KitInfo(nullptr), {}, {}}, {part1, part2});
 
     helper.updateProjectInfo(pi);
-    QCOMPARE(mm->snapshot().size(), 4);
+    QCOMPARE(CppModelManager::snapshot().size(), 4);
 
     // Open a file in the editor
     QCOMPARE(Core::DocumentModel::openedDocuments().size(), 0);
@@ -842,18 +827,17 @@ void ModelManagerTest::testPrecompiledHeaders()
         EditorCloser closer(editor);
         QVERIFY(editor);
         QCOMPARE(Core::DocumentModel::openedDocuments().size(), 1);
-        QVERIFY(mm->isCppEditor(editor));
+        QVERIFY(CppModelManager::isCppEditor(editor));
 
         auto parser = BuiltinEditorDocumentParser::get(filePath);
         QVERIFY(parser);
         BaseEditorDocumentParser::Configuration config = parser->configuration();
         config.usePrecompiledHeaders = true;
         parser->setConfiguration(config);
-        parser->update({CppModelManager::instance()->workingCopy(), nullptr,
-                        Utils::Language::Cxx, false});
+        parser->update({CppModelManager::workingCopy(), nullptr,Utils::Language::Cxx, false});
 
         // Check if defines from pch are considered
-        Document::Ptr document = mm->document(filePath);
+        Document::Ptr document = CppModelManager::document(filePath);
         QCOMPARE(nameOfFirstDeclaration(document), firstDeclarationName);
 
         // Check if declarations from pch are considered
@@ -876,8 +860,6 @@ void ModelManagerTest::testDefinesPerEditor()
     const FilePath main2File = testDataDirectory.filePath("main2.cpp");
     const FilePath header = testDataDirectory.filePath("header.h");
 
-    CppModelManager *mm = CppModelManager::instance();
-
     const auto project = helper.createProject(_("test_modelmanager_defines_per_editor"),
                                               Utils::FilePath::fromString("blubb.pro"));
 
@@ -896,7 +878,7 @@ void ModelManagerTest::testDefinesPerEditor()
     const auto pi = ProjectInfo::create({project, KitInfo(nullptr), {}, {}}, {part1, part2});
     helper.updateProjectInfo(pi);
 
-    QCOMPARE(mm->snapshot().size(), 4);
+    QCOMPARE(CppModelManager::snapshot().size(), 4);
 
     // Open a file in the editor
     QCOMPARE(Core::DocumentModel::openedDocuments().size(), 0);
@@ -916,17 +898,16 @@ void ModelManagerTest::testDefinesPerEditor()
         EditorCloser closer(editor);
         QVERIFY(editor);
         QCOMPARE(Core::DocumentModel::openedDocuments().size(), 1);
-        QVERIFY(mm->isCppEditor(editor));
+        QVERIFY(CppModelManager::isCppEditor(editor));
 
         const FilePath filePath = editor->document()->filePath();
         const auto parser = BaseEditorDocumentParser::get(filePath);
         BaseEditorDocumentParser::Configuration config = parser->configuration();
         config.editorDefines = editorDefines.toUtf8();
         parser->setConfiguration(config);
-        parser->update({CppModelManager::instance()->workingCopy(), nullptr,
-                        Utils::Language::Cxx, false});
+        parser->update({CppModelManager::workingCopy(), nullptr, Utils::Language::Cxx, false});
 
-        Document::Ptr doc = mm->document(main1File);
+        Document::Ptr doc = CppModelManager::document(main1File);
         QCOMPARE(nameOfFirstDeclaration(doc), firstDeclarationName);
     }
 }
@@ -986,7 +967,7 @@ void ModelManagerTest::testUpdateEditorsAfterProjectUpdate()
 void ModelManagerTest::testRenameIncludes()
 {
     struct ModelManagerGCHelper {
-        ~ModelManagerGCHelper() { CppModelManager::instance()->GC(); }
+        ~ModelManagerGCHelper() { CppModelManager::GC(); }
     } GCHelper;
     Q_UNUSED(GCHelper) // do not warn about being unused
 
@@ -997,7 +978,6 @@ void ModelManagerTest::testRenameIncludes()
     const QStringList fileNames = {"foo.h", "foo.cpp", "main.cpp"};
     const FilePath oldHeader = FilePath::fromString(workingDir.filePath("foo.h"));
     const FilePath newHeader = FilePath::fromString(workingDir.filePath("bar.h"));
-    CppModelManager *modelManager = CppModelManager::instance();
     const MyTestDataDir testDir(_("testdata_project1"));
 
     // Copy test files to a temporary directory
@@ -1012,9 +992,9 @@ void ModelManagerTest::testRenameIncludes()
     }
 
     // Update the c++ model manager and check for the old includes
-    modelManager->updateSourceFiles(sourceFiles).waitForFinished();
+    CppModelManager::updateSourceFiles(sourceFiles).waitForFinished();
     QCoreApplication::processEvents();
-    CPlusPlus::Snapshot snapshot = modelManager->snapshot();
+    CPlusPlus::Snapshot snapshot = CppModelManager::snapshot();
     for (const FilePath &sourceFile : std::as_const(sourceFiles)) {
         QCOMPARE(snapshot.allIncludesForDocument(sourceFile), QSet<FilePath>{oldHeader});
     }
@@ -1025,9 +1005,9 @@ void ModelManagerTest::testRenameIncludes()
                                         Core::HandleIncludeGuards::Yes));
 
     // Update the c++ model manager again and check for the new includes
-    modelManager->updateSourceFiles(sourceFiles).waitForFinished();
+    CppModelManager::updateSourceFiles(sourceFiles).waitForFinished();
     QCoreApplication::processEvents();
-    snapshot = modelManager->snapshot();
+    snapshot = CppModelManager::snapshot();
     for (const FilePath &sourceFile : std::as_const(sourceFiles)) {
         QCOMPARE(snapshot.allIncludesForDocument(sourceFile), QSet<FilePath>{newHeader});
     }
@@ -1036,7 +1016,7 @@ void ModelManagerTest::testRenameIncludes()
 void ModelManagerTest::testRenameIncludesInEditor()
 {
     struct ModelManagerGCHelper {
-        ~ModelManagerGCHelper() { CppModelManager::instance()->GC(); }
+        ~ModelManagerGCHelper() { CppModelManager::GC(); }
     } GCHelper;
     Q_UNUSED(GCHelper) // do not warn about being unused
 
@@ -1054,7 +1034,6 @@ void ModelManagerTest::testRenameIncludesInEditor()
     const QString headerWithMalformedGuard(workingDir.filePath(_("baz3.h")));
     const QString renamedHeaderWithMalformedGuard(workingDir.filePath(_("foobar5000.h")));
     const FilePath mainFile = FilePath::fromString(workingDir.filePath("main.cpp"));
-    CppModelManager *modelManager = CppModelManager::instance();
     const MyTestDataDir testDir(_("testdata_project1"));
 
     ModelManagerTestHelper helper;
@@ -1072,9 +1051,9 @@ void ModelManagerTest::testRenameIncludesInEditor()
     }
 
     // Update the c++ model manager and check for the old includes
-    modelManager->updateSourceFiles(sourceFiles).waitForFinished();
+    CppModelManager::updateSourceFiles(sourceFiles).waitForFinished();
     QCoreApplication::processEvents();
-    CPlusPlus::Snapshot snapshot = modelManager->snapshot();
+    CPlusPlus::Snapshot snapshot = CppModelManager::snapshot();
     for (const FilePath &sourceFile : std::as_const(sourceFiles)) {
         QCOMPARE(snapshot.allIncludesForDocument(sourceFile),
                  QSet<FilePath>{headerWithPragmaOnce});
@@ -1087,8 +1066,8 @@ void ModelManagerTest::testRenameIncludesInEditor()
     EditorCloser editorCloser(editor);
     const QScopeGuard cleanup([] { Core::DocumentManager::saveAllModifiedDocumentsSilently(); });
     QCOMPARE(Core::DocumentModel::openedDocuments().size(), 1);
-    QVERIFY(modelManager->isCppEditor(editor));
-    QVERIFY(modelManager->workingCopy().get(mainFile));
+    QVERIFY(CppModelManager::isCppEditor(editor));
+    QVERIFY(CppModelManager::workingCopy().get(mainFile));
 
     // Test the renaming of a header file where a pragma once guard is present
     QVERIFY(Core::FileUtils::renameFile(headerWithPragmaOnce,
@@ -1150,9 +1129,9 @@ void ModelManagerTest::testRenameIncludesInEditor()
 
     // Update the c++ model manager again and check for the new includes
     TestCase::waitForProcessedEditorDocument(mainFile);
-    modelManager->updateSourceFiles(sourceFiles).waitForFinished();
+    CppModelManager::updateSourceFiles(sourceFiles).waitForFinished();
     QCoreApplication::processEvents();
-    snapshot = modelManager->snapshot();
+    snapshot = CppModelManager::snapshot();
     for (const FilePath &sourceFile : std::as_const(sourceFiles)) {
         QCOMPARE(snapshot.allIncludesForDocument(sourceFile),
                  QSet<FilePath>{renamedHeaderWithPragmaOnce});
@@ -1170,35 +1149,34 @@ void ModelManagerTest::testDocumentsAndRevisions()
     const QSet<FilePath> filesToIndex = {filePath1,filePath2};
     QVERIFY(TestCase::parseFiles(filesToIndex));
 
-    CppModelManager *modelManager = CppModelManager::instance();
-    VERIFY_DOCUMENT_REVISION(modelManager->document(filePath1), 1U);
-    VERIFY_DOCUMENT_REVISION(modelManager->document(filePath2), 1U);
+    VERIFY_DOCUMENT_REVISION(CppModelManager::document(filePath1), 1U);
+    VERIFY_DOCUMENT_REVISION(CppModelManager::document(filePath2), 1U);
 
     // Open editor for file 1
     TextEditor::BaseTextEditor *editor1;
     QVERIFY(helper.openCppEditor(filePath1, &editor1));
     helper.closeEditorAtEndOfTestCase(editor1);
     QVERIFY(TestCase::waitForProcessedEditorDocument(filePath1));
-    VERIFY_DOCUMENT_REVISION(modelManager->document(filePath1), 2U);
-    VERIFY_DOCUMENT_REVISION(modelManager->document(filePath2), 1U);
+    VERIFY_DOCUMENT_REVISION(CppModelManager::document(filePath1), 2U);
+    VERIFY_DOCUMENT_REVISION(CppModelManager::document(filePath2), 1U);
 
     // Index again
     QVERIFY(TestCase::parseFiles(filesToIndex));
-    VERIFY_DOCUMENT_REVISION(modelManager->document(filePath1), 3U);
-    VERIFY_DOCUMENT_REVISION(modelManager->document(filePath2), 2U);
+    VERIFY_DOCUMENT_REVISION(CppModelManager::document(filePath1), 3U);
+    VERIFY_DOCUMENT_REVISION(CppModelManager::document(filePath2), 2U);
 
     // Open editor for file 2
     TextEditor::BaseTextEditor *editor2;
     QVERIFY(helper.openCppEditor(filePath2, &editor2));
     helper.closeEditorAtEndOfTestCase(editor2);
     QVERIFY(TestCase::waitForProcessedEditorDocument(filePath2));
-    VERIFY_DOCUMENT_REVISION(modelManager->document(filePath1), 3U);
-    VERIFY_DOCUMENT_REVISION(modelManager->document(filePath2), 3U);
+    VERIFY_DOCUMENT_REVISION(CppModelManager::document(filePath1), 3U);
+    VERIFY_DOCUMENT_REVISION(CppModelManager::document(filePath2), 3U);
 
     // Index again
     QVERIFY(TestCase::parseFiles(filesToIndex));
-    VERIFY_DOCUMENT_REVISION(modelManager->document(filePath1), 4U);
-    VERIFY_DOCUMENT_REVISION(modelManager->document(filePath2), 4U);
+    VERIFY_DOCUMENT_REVISION(CppModelManager::document(filePath1), 4U);
+    VERIFY_DOCUMENT_REVISION(CppModelManager::document(filePath2), 4U);
 }
 
 } // CppEditor::Internal
diff --git a/src/plugins/cppeditor/cppprojectupdater.cpp b/src/plugins/cppeditor/cppprojectupdater.cpp
index e4b57c90c5a..4df4b5de4ae 100644
--- a/src/plugins/cppeditor/cppprojectupdater.cpp
+++ b/src/plugins/cppeditor/cppprojectupdater.cpp
@@ -81,8 +81,7 @@ void CppProjectUpdater::update(const ProjectUpdateInfo &projectUpdateInfo,
             }
         }
         GeneratedCodeModelSupport::update(extraCompilers);
-        auto updateFuture = CppModelManager::instance()->updateProjectInfo(storage->projectInfo,
-                                                                           compilerFiles);
+        auto updateFuture = CppModelManager::updateProjectInfo(storage->projectInfo, compilerFiles);
         m_futureSynchronizer.addFuture(updateFuture);
         m_taskTree.release()->deleteLater();
     };
diff --git a/src/plugins/cppeditor/cppquickfix_test.cpp b/src/plugins/cppeditor/cppquickfix_test.cpp
index 048ec9915e2..09bc7d05d45 100644
--- a/src/plugins/cppeditor/cppquickfix_test.cpp
+++ b/src/plugins/cppeditor/cppquickfix_test.cpp
@@ -95,8 +95,8 @@ BaseQuickFixTestCase::BaseQuickFixTestCase(const QList<TestDocumentPtr> &testDoc
     // Set appropriate include paths
     if (!headerPaths.isEmpty()) {
         m_restoreHeaderPaths = true;
-        m_headerPathsToRestore = m_modelManager->headerPaths();
-        m_modelManager->setHeaderPaths(headerPaths);
+        m_headerPathsToRestore = CppModelManager::headerPaths();
+        CppModelManager::setHeaderPaths(headerPaths);
     }
 
     // Update Code Model
@@ -154,7 +154,7 @@ BaseQuickFixTestCase::~BaseQuickFixTestCase()
 
     // Restore include paths
     if (m_restoreHeaderPaths)
-        m_modelManager->setHeaderPaths(m_headerPathsToRestore);
+        CppModelManager::setHeaderPaths(m_headerPathsToRestore);
 
     // Remove created files from file system
     for (const TestDocumentPtr &testDocument : std::as_const(m_testDocuments))
diff --git a/src/plugins/cppeditor/cppquickfixassistant.cpp b/src/plugins/cppeditor/cppquickfixassistant.cpp
index 19514387d71..9202e639a28 100644
--- a/src/plugins/cppeditor/cppquickfixassistant.cpp
+++ b/src/plugins/cppeditor/cppquickfixassistant.cpp
@@ -51,7 +51,7 @@ CppQuickFixInterface::CppQuickFixInterface(CppEditorWidget *editor, AssistReason
     : AssistInterface(editor->textCursor(), editor->textDocument()->filePath(), reason)
     , m_editor(editor)
     , m_semanticInfo(editor->semanticInfo())
-    , m_snapshot(CppModelManager::instance()->snapshot())
+    , m_snapshot(CppModelManager::snapshot())
     , m_currentFile(CppRefactoringChanges::file(editor, m_semanticInfo.doc))
     , m_context(m_semanticInfo.doc, m_snapshot)
 {
diff --git a/src/plugins/cppeditor/cppquickfixes.cpp b/src/plugins/cppeditor/cppquickfixes.cpp
index 93596f5ec43..9786083f6f8 100644
--- a/src/plugins/cppeditor/cppquickfixes.cpp
+++ b/src/plugins/cppeditor/cppquickfixes.cpp
@@ -1899,10 +1899,9 @@ ProjectExplorer::HeaderPaths relevantHeaderPaths(const QString &filePath)
 {
     ProjectExplorer::HeaderPaths headerPaths;
 
-    CppModelManager *modelManager = CppModelManager::instance();
-    const QList<ProjectPart::ConstPtr> projectParts = modelManager->projectPart(filePath);
+    const QList<ProjectPart::ConstPtr> projectParts = CppModelManager::projectPart(filePath);
     if (projectParts.isEmpty()) { // Not part of any project, better use all include paths than none
-        headerPaths += modelManager->headerPaths();
+        headerPaths += CppModelManager::headerPaths();
     } else {
         for (const ProjectPart::ConstPtr &part : projectParts)
             headerPaths += part->headerPaths;
@@ -1997,7 +1996,7 @@ QList<IndexItem::Ptr> matchName(const Name *name, QString *className)
 
     QString simpleName;
     QList<IndexItem::Ptr> matches;
-    CppLocatorData *locatorData = CppModelManager::instance()->locatorData();
+    CppLocatorData *locatorData = CppModelManager::locatorData();
     const Overview oo;
     if (const QualifiedNameId *qualifiedName = name->asQualifiedNameId()) {
         const Name *name = qualifiedName->name();
diff --git a/src/plugins/cppeditor/cpprefactoringchanges.cpp b/src/plugins/cppeditor/cpprefactoringchanges.cpp
index dcbb53f3b11..98eaaa8febb 100644
--- a/src/plugins/cppeditor/cpprefactoringchanges.cpp
+++ b/src/plugins/cppeditor/cpprefactoringchanges.cpp
@@ -217,8 +217,7 @@ void CppRefactoringFile::fileChanged()
 
 CppRefactoringChangesData::CppRefactoringChangesData(const Snapshot &snapshot)
     : m_snapshot(snapshot)
-    , m_modelManager(CppModelManager::instance())
-    , m_workingCopy(m_modelManager->workingCopy())
+    , m_workingCopy(CppModelManager::workingCopy())
 {}
 
 void CppRefactoringChangesData::indentSelection(const QTextCursor &selection,
@@ -249,7 +248,7 @@ void CppRefactoringChangesData::reindentSelection(const QTextCursor &selection,
 
 void CppRefactoringChangesData::fileChanged(const FilePath &filePath)
 {
-    m_modelManager->updateSourceFiles({filePath});
+    CppModelManager::updateSourceFiles({filePath});
 }
 
 } // CppEditor
diff --git a/src/plugins/cppeditor/cpprefactoringchanges.h b/src/plugins/cppeditor/cpprefactoringchanges.h
index 4a79da2f73e..5dca8a9ca51 100644
--- a/src/plugins/cppeditor/cpprefactoringchanges.h
+++ b/src/plugins/cppeditor/cpprefactoringchanges.h
@@ -76,7 +76,6 @@ public:
     void fileChanged(const Utils::FilePath &filePath) override;
 
     CPlusPlus::Snapshot m_snapshot;
-    CppModelManager *m_modelManager;
     WorkingCopy m_workingCopy;
 };
 
diff --git a/src/plugins/cppeditor/cppsemanticinfoupdater.cpp b/src/plugins/cppeditor/cppsemanticinfoupdater.cpp
index 4fc9dd7c66b..4edc7dac13a 100644
--- a/src/plugins/cppeditor/cppsemanticinfoupdater.cpp
+++ b/src/plugins/cppeditor/cppsemanticinfoupdater.cpp
@@ -178,7 +178,7 @@ void SemanticInfoUpdater::updateDetached(const SemanticInfo::Source &source)
         return;
     }
 
-    d->m_future = Utils::asyncRun(CppModelManager::instance()->sharedThreadPool(),
+    d->m_future = Utils::asyncRun(CppModelManager::sharedThreadPool(),
                                   &SemanticInfoUpdaterPrivate::update_helper, d.data(), source);
 }
 
diff --git a/src/plugins/cppeditor/cppsourceprocessor_test.cpp b/src/plugins/cppeditor/cppsourceprocessor_test.cpp
index b6ec4a4095e..23c5e111f63 100644
--- a/src/plugins/cppeditor/cppsourceprocessor_test.cpp
+++ b/src/plugins/cppeditor/cppsourceprocessor_test.cpp
@@ -34,7 +34,6 @@ class SourcePreprocessor
 {
 public:
     SourcePreprocessor()
-        : m_cmm(CppModelManager::instance())
     {
         cleanUp();
     }
@@ -47,7 +46,7 @@ public:
                                          TestIncludePaths::directoryOfTestFile())});
         sourceProcessor->run(filePath);
 
-        Document::Ptr document = m_cmm->document(filePath);
+        Document::Ptr document = CppModelManager::document(filePath);
         return document;
     }
 
@@ -59,12 +58,9 @@ public:
 private:
     void cleanUp()
     {
-        m_cmm->GC();
-        QVERIFY(m_cmm->snapshot().isEmpty());
+        CppModelManager::GC();
+        QVERIFY(CppModelManager::snapshot().isEmpty());
     }
-
-private:
-    CppModelManager *m_cmm;
 };
 
 /// Check: Resolved and unresolved includes are properly tracked.
diff --git a/src/plugins/cppeditor/cpptoolsjsextension.cpp b/src/plugins/cppeditor/cpptoolsjsextension.cpp
index 0818af0acb4..6e3c1f1a7dc 100644
--- a/src/plugins/cppeditor/cpptoolsjsextension.cpp
+++ b/src/plugins/cppeditor/cpptoolsjsextension.cpp
@@ -151,8 +151,8 @@ bool CppToolsJsExtension::hasQObjectParent(const QString &klassName) const
     const IndexItem::Ptr item = candidates.first();
 
     // Find class in AST.
-    const CPlusPlus::Snapshot snapshot = CppModelManager::instance()->snapshot();
-    const WorkingCopy workingCopy = CppModelManager::instance()->workingCopy();
+    const CPlusPlus::Snapshot snapshot = CppModelManager::snapshot();
+    const WorkingCopy workingCopy = CppModelManager::workingCopy();
     std::optional<QByteArray> source = workingCopy.source(item->filePath());
     if (!source) {
         const Utils::expected_str<QByteArray> contents = item->filePath().fileContents();
diff --git a/src/plugins/cppeditor/cpptoolstestcase.cpp b/src/plugins/cppeditor/cpptoolstestcase.cpp
index 810f66db49c..63949229abe 100644
--- a/src/plugins/cppeditor/cpptoolstestcase.cpp
+++ b/src/plugins/cppeditor/cpptoolstestcase.cpp
@@ -149,15 +149,15 @@ VerifyCleanCppModelManager::~VerifyCleanCppModelManager() {
 
 bool VerifyCleanCppModelManager::isClean(bool testOnlyForCleanedProjects)
 {
-    CppModelManager *mm = CppModelManager::instance();
-    RETURN_FALSE_IF_NOT(mm->projectInfos().isEmpty());
-    RETURN_FALSE_IF_NOT(mm->headerPaths().isEmpty());
-    RETURN_FALSE_IF_NOT(mm->definedMacros().isEmpty());
-    RETURN_FALSE_IF_NOT(mm->projectFiles().isEmpty());
+    RETURN_FALSE_IF_NOT(CppModelManager::projectInfos().isEmpty());
+    RETURN_FALSE_IF_NOT(CppModelManager::headerPaths().isEmpty());
+    RETURN_FALSE_IF_NOT(CppModelManager::definedMacros().isEmpty());
+    RETURN_FALSE_IF_NOT(CppModelManager::projectFiles().isEmpty());
     if (!testOnlyForCleanedProjects) {
-        RETURN_FALSE_IF_NOT(mm->snapshot().isEmpty());
-        RETURN_FALSE_IF_NOT(mm->workingCopy().size() == 1);
-        RETURN_FALSE_IF_NOT(mm->workingCopy().get(mm->configurationFileName()));
+        RETURN_FALSE_IF_NOT(CppModelManager::snapshot().isEmpty());
+        RETURN_FALSE_IF_NOT(CppModelManager::workingCopy().size() == 1);
+        RETURN_FALSE_IF_NOT(CppModelManager::workingCopy()
+            .get(CppModelManager::configurationFileName()));
     }
     return true;
 }
@@ -170,9 +170,9 @@ namespace CppEditor::Tests {
 
 static bool closeEditorsWithoutGarbageCollectorInvocation(const QList<Core::IEditor *> &editors)
 {
-    CppModelManager::instance()->enableGarbageCollector(false);
+    CppModelManager::enableGarbageCollector(false);
     const bool closeEditorsSucceeded = Core::EditorManager::closeEditors(editors, false);
-    CppModelManager::instance()->enableGarbageCollector(true);
+    CppModelManager::enableGarbageCollector(true);
     return closeEditorsSucceeded;
 }
 
@@ -188,8 +188,7 @@ static bool snapshotContains(const CPlusPlus::Snapshot &snapshot, const QSet<Fil
 }
 
 TestCase::TestCase(bool runGarbageCollector)
-    : m_modelManager(CppModelManager::instance())
-    , m_succeededSoFar(false)
+    : m_succeededSoFar(false)
     , m_runGarbageCollector(runGarbageCollector)
 {
     if (m_runGarbageCollector)
@@ -239,12 +238,12 @@ bool TestCase::openCppEditor(const FilePath &filePath, TextEditor::BaseTextEdito
 
 CPlusPlus::Snapshot TestCase::globalSnapshot()
 {
-    return CppModelManager::instance()->snapshot();
+    return CppModelManager::snapshot();
 }
 
 bool TestCase::garbageCollectGlobalSnapshot()
 {
-    CppModelManager::instance()->GC();
+    CppModelManager::GC();
     return globalSnapshot().isEmpty();
 }
 
@@ -269,7 +268,7 @@ static bool waitForProcessedEditorDocument_internal(CppEditorDocumentHandle *edi
 
 bool TestCase::waitForProcessedEditorDocument(const FilePath &filePath, int timeOutInMs)
 {
-    auto *editorDocument = CppModelManager::instance()->cppEditorDocument(filePath);
+    auto *editorDocument = CppModelManager::cppEditorDocument(filePath);
     return waitForProcessedEditorDocument_internal(editorDocument, timeOutInMs);
 }
 
@@ -282,7 +281,7 @@ CPlusPlus::Document::Ptr TestCase::waitForRehighlightedSemanticDocument(CppEdito
 
 bool TestCase::parseFiles(const QSet<FilePath> &filePaths)
 {
-    CppModelManager::instance()->updateSourceFiles(filePaths).waitForFinished();
+    CppModelManager::updateSourceFiles(filePaths).waitForFinished();
     QCoreApplication::processEvents();
     const CPlusPlus::Snapshot snapshot = globalSnapshot();
     if (snapshot.isEmpty()) {
@@ -349,7 +348,7 @@ bool TestCase::waitUntilProjectIsFullyOpened(Project *project, int timeOutInMs)
         [project]() {
             return ProjectManager::startupBuildSystem()
                     && !ProjectManager::startupBuildSystem()->isParsing()
-                    && CppModelManager::instance()->projectInfo(project);
+                    && CppModelManager::projectInfo(project);
         },
         timeOutInMs);
 }
@@ -405,7 +404,7 @@ ProjectInfo::ConstPtr ProjectOpenerAndCloser::open(const FilePath &projectFile,
 
     if (TestCase::waitUntilProjectIsFullyOpened(project)) {
         m_openProjects.append(project);
-        return CppModelManager::instance()->projectInfo(project);
+        return CppModelManager::projectInfo(project);
     }
 
     return {};
diff --git a/src/plugins/cppeditor/cpptoolstestcase.h b/src/plugins/cppeditor/cpptoolstestcase.h
index 84cf0f088a8..13548630e65 100644
--- a/src/plugins/cppeditor/cpptoolstestcase.h
+++ b/src/plugins/cppeditor/cpptoolstestcase.h
@@ -32,7 +32,6 @@ class IAssistProposal;
 
 namespace CppEditor {
 class CppEditorWidget;
-class CppModelManager;
 
 namespace Internal::Tests {
 
@@ -152,7 +151,6 @@ public:
     static bool writeFile(const Utils::FilePath &filePath, const QByteArray &contents);
 
 protected:
-    CppModelManager *m_modelManager;
     bool m_succeededSoFar;
 
 private:
diff --git a/src/plugins/cppeditor/cppuseselections_test.cpp b/src/plugins/cppeditor/cppuseselections_test.cpp
index c9c56752844..2e5a0f2a0d8 100644
--- a/src/plugins/cppeditor/cppuseselections_test.cpp
+++ b/src/plugins/cppeditor/cppuseselections_test.cpp
@@ -81,7 +81,7 @@ UseSelectionsTestCase::UseSelectionsTestCase(CppTestDocument &testFile,
 
     bool hasTimedOut;
     const SelectionList selections = waitForUseSelections(&hasTimedOut);
-    const bool clangCodeModel = CppModelManager::instance()->isClangCodeModelActive();
+    const bool clangCodeModel = CppModelManager::isClangCodeModelActive();
     if (clangCodeModel) {
         QEXPECT_FAIL("local use as macro argument - argument eaten", "fails with CCM, find out why",
                      Abort);
diff --git a/src/plugins/cppeditor/fileandtokenactions_test.cpp b/src/plugins/cppeditor/fileandtokenactions_test.cpp
index 2ad6b6b4ef2..75dd0719a5c 100644
--- a/src/plugins/cppeditor/fileandtokenactions_test.cpp
+++ b/src/plugins/cppeditor/fileandtokenactions_test.cpp
@@ -110,7 +110,7 @@ static bool waitUntilAProjectIsLoaded(int timeOutInMs = 30000)
     timer.start();
 
     while (timer.elapsed() < timeOutInMs) {
-        if (!CppModelManager::instance()->projectInfos().isEmpty())
+        if (!CppModelManager::projectInfos().isEmpty())
             return true;
 
         QCoreApplication::processEvents();
@@ -132,7 +132,7 @@ TestActionsTestCase::TestActionsTestCase(const Actions &tokenActions, const Acti
     // Collect files to process
     FilePaths filesToOpen;
     QList<QPointer<ProjectExplorer::Project> > projects;
-    const QList<ProjectInfo::ConstPtr> projectInfos = m_modelManager->projectInfos();
+    const QList<ProjectInfo::ConstPtr> projectInfos = CppModelManager::projectInfos();
 
    for (const ProjectInfo::ConstPtr &info : projectInfos) {
         qDebug() << "Project" << info->projectFilePath().toUserOutput() << "- files to process:"
@@ -162,8 +162,8 @@ TestActionsTestCase::TestActionsTestCase(const Actions &tokenActions, const Acti
         QVERIFY(openCppEditor(filePath, &editor, &editorWidget));
 
         QCOMPARE(DocumentModel::openedDocuments().size(), 1);
-        QVERIFY(m_modelManager->isCppEditor(editor));
-        QVERIFY(m_modelManager->workingCopy().get(filePath));
+        QVERIFY(CppModelManager::isCppEditor(editor));
+        QVERIFY(CppModelManager::workingCopy().get(filePath));
 
         // Rehighlight
         waitForRehighlightedSemanticDocument(editorWidget);
diff --git a/src/plugins/cppeditor/followsymbol_switchmethoddecldef_test.cpp b/src/plugins/cppeditor/followsymbol_switchmethoddecldef_test.cpp
index 31d69f7363d..0432985eafb 100644
--- a/src/plugins/cppeditor/followsymbol_switchmethoddecldef_test.cpp
+++ b/src/plugins/cppeditor/followsymbol_switchmethoddecldef_test.cpp
@@ -331,7 +331,7 @@ F2TestCase::F2TestCase(CppEditorAction action,
     switch (action) {
     case FollowSymbolUnderCursorAction: {
         CppEditorWidget *widget = initialTestFile->m_editorWidget;
-        if (CppModelManager::instance()->isClangCodeModelActive()) {
+        if (CppModelManager::isClangCodeModelActive()) {
             if (curTestName == "testFollowSymbolQTCREATORBUG7903")
                 QSKIP((curTestName + " is not supported by Clang FollowSymbol").toLatin1());
             widget->enableTestMode();
diff --git a/src/plugins/cppeditor/generatedcodemodelsupport.cpp b/src/plugins/cppeditor/generatedcodemodelsupport.cpp
index 22a9b2735eb..63c9de66b91 100644
--- a/src/plugins/cppeditor/generatedcodemodelsupport.cpp
+++ b/src/plugins/cppeditor/generatedcodemodelsupport.cpp
@@ -49,10 +49,10 @@ private:
     QSet<QObject *> m_cache;
 };
 
-GeneratedCodeModelSupport::GeneratedCodeModelSupport(CppModelManager *modelmanager,
-                                                     ExtraCompiler *generator,
+GeneratedCodeModelSupport::GeneratedCodeModelSupport(ExtraCompiler *generator,
                                                      const FilePath &generatedFile) :
-    AbstractEditorSupport(modelmanager, generator), m_generatedFilePath(generatedFile),
+    AbstractEditorSupport(generator),
+    m_generatedFilePath(generatedFile),
     m_generator(generator)
 {
     QLoggingCategory log("qtc.cppeditor.generatedcodemodelsupport", QtWarningMsg);
@@ -66,8 +66,7 @@ GeneratedCodeModelSupport::GeneratedCodeModelSupport(CppModelManager *modelmanag
 
 GeneratedCodeModelSupport::~GeneratedCodeModelSupport()
 {
-    CppModelManager::instance()->emitAbstractEditorSupportRemoved(
-                m_generatedFilePath.toString());
+    CppModelManager::emitAbstractEditorSupportRemoved(m_generatedFilePath.toString());
     QLoggingCategory log("qtc.cppeditor.generatedcodemodelsupport", QtWarningMsg);
     qCDebug(log) << "dtor ~generatedcodemodelsupport for" << m_generatedFilePath;
 }
@@ -99,15 +98,13 @@ void GeneratedCodeModelSupport::update(const QList<ExtraCompiler *> &generators)
 {
     static QObjectCache extraCompilerCache;
 
-    CppModelManager * const mm = CppModelManager::instance();
-
     for (ExtraCompiler *generator : generators) {
         if (extraCompilerCache.contains(generator))
             continue;
 
         extraCompilerCache.insert(generator);
-        generator->forEachTarget([mm, generator](const FilePath &generatedFile) {
-            new GeneratedCodeModelSupport(mm, generator, generatedFile);
+        generator->forEachTarget([generator](const FilePath &generatedFile) {
+            new GeneratedCodeModelSupport(generator, generatedFile);
         });
     }
 }
diff --git a/src/plugins/cppeditor/generatedcodemodelsupport.h b/src/plugins/cppeditor/generatedcodemodelsupport.h
index d37177d9910..618a837e8b2 100644
--- a/src/plugins/cppeditor/generatedcodemodelsupport.h
+++ b/src/plugins/cppeditor/generatedcodemodelsupport.h
@@ -15,8 +15,7 @@ class CPPEDITOR_EXPORT GeneratedCodeModelSupport : public AbstractEditorSupport
     Q_OBJECT
 
 public:
-    GeneratedCodeModelSupport(CppModelManager *modelmanager,
-                              ProjectExplorer::ExtraCompiler *generator,
+    GeneratedCodeModelSupport(ProjectExplorer::ExtraCompiler *generator,
                               const Utils::FilePath &generatedFile);
     ~GeneratedCodeModelSupport() override;
 
diff --git a/src/plugins/cppeditor/includeutils.cpp b/src/plugins/cppeditor/includeutils.cpp
index 1404f5bace3..c7daa4e9d8f 100644
--- a/src/plugins/cppeditor/includeutils.cpp
+++ b/src/plugins/cppeditor/includeutils.cpp
@@ -511,14 +511,13 @@ namespace Internal {
 
 static QList<Include> includesForSource(const FilePath &filePath)
 {
-    CppModelManager *cmm = CppModelManager::instance();
-    cmm->GC();
+    CppModelManager::GC();
     QScopedPointer<CppSourceProcessor> sourceProcessor(CppModelManager::createSourceProcessor());
     sourceProcessor->setHeaderPaths({ProjectExplorer::HeaderPath::makeUser(
                                      TestIncludePaths::globalIncludePath())});
     sourceProcessor->run(filePath);
 
-    Document::Ptr document = cmm->document(filePath);
+    Document::Ptr document = CppModelManager::document(filePath);
     return document->resolvedIncludes();
 }
 
diff --git a/src/plugins/cppeditor/modelmanagertesthelper.cpp b/src/plugins/cppeditor/modelmanagertesthelper.cpp
index a133ac7fef2..bfc3998e8ee 100644
--- a/src/plugins/cppeditor/modelmanagertesthelper.cpp
+++ b/src/plugins/cppeditor/modelmanagertesthelper.cpp
@@ -81,7 +81,7 @@ QSet<FilePath> ModelManagerTestHelper::updateProjectInfo(
         const ProjectInfo::ConstPtr &projectInfo)
 {
     resetRefreshedSourceFiles();
-    CppModelManager::instance()->updateProjectInfo(projectInfo).waitForFinished();
+    CppModelManager::updateProjectInfo(projectInfo).waitForFinished();
     QCoreApplication::processEvents();
     return waitForRefreshedSourceFiles();
 }
diff --git a/src/plugins/cppeditor/symbolfinder.cpp b/src/plugins/cppeditor/symbolfinder.cpp
index 5da95a13621..dfc36a0e8aa 100644
--- a/src/plugins/cppeditor/symbolfinder.cpp
+++ b/src/plugins/cppeditor/symbolfinder.cpp
@@ -476,7 +476,7 @@ void SymbolFinder::checkCacheConsistency(const FilePath &referenceFile, const Sn
 
 const QString projectPartIdForFile(const FilePath &filePath)
 {
-    const QList<ProjectPart::ConstPtr> parts = CppModelManager::instance()->projectPart(filePath);
+    const QList<ProjectPart::ConstPtr> parts = CppModelManager::projectPart(filePath);
     if (!parts.isEmpty())
         return parts.first()->id();
     return QString();
diff --git a/src/plugins/cppeditor/symbolsfindfilter.cpp b/src/plugins/cppeditor/symbolsfindfilter.cpp
index eb6a4c81dab..bf1158c414f 100644
--- a/src/plugins/cppeditor/symbolsfindfilter.cpp
+++ b/src/plugins/cppeditor/symbolsfindfilter.cpp
@@ -35,9 +35,8 @@ const char SETTINGS_GROUP[] = "CppSymbols";
 const char SETTINGS_SYMBOLTYPES[] = "SymbolsToSearchFor";
 const char SETTINGS_SEARCHSCOPE[] = "SearchScope";
 
-SymbolsFindFilter::SymbolsFindFilter(CppModelManager *manager)
-    : m_manager(manager),
-      m_enabled(true),
+SymbolsFindFilter::SymbolsFindFilter()
+    : m_enabled(true),
       m_symbolsToSearch(SearchSymbols::AllTypes),
       m_scope(SymbolSearcher::SearchProjectsOnly)
 {
@@ -121,7 +120,7 @@ void SymbolsFindFilter::startSearch(SearchResult *search)
     SymbolSearcher *symbolSearcher = new SymbolSearcher(parameters, projectFileNames);
     connect(watcher, &QFutureWatcherBase::finished,
             symbolSearcher, &QObject::deleteLater);
-    watcher->setFuture(Utils::asyncRun(m_manager->sharedThreadPool(),
+    watcher->setFuture(Utils::asyncRun(CppModelManager::sharedThreadPool(),
                                        &SymbolSearcher::runSearch, symbolSearcher));
     FutureProgress *progress = ProgressManager::addTask(watcher->future(), Tr::tr("Searching for Symbol"),
                                                         Core::Constants::TASK_SEARCH);
diff --git a/src/plugins/cppeditor/symbolsfindfilter.h b/src/plugins/cppeditor/symbolsfindfilter.h
index db7d4d323ab..a308bd93074 100644
--- a/src/plugins/cppeditor/symbolsfindfilter.h
+++ b/src/plugins/cppeditor/symbolsfindfilter.h
@@ -18,8 +18,6 @@ namespace Core { class SearchResult; }
 namespace Utils { class SearchResultItem; }
 
 namespace CppEditor {
-class CppModelManager;
-
 namespace Internal {
 
 class SymbolsFindFilter : public Core::IFindFilter
@@ -30,7 +28,7 @@ public:
     using SearchScope = SymbolSearcher::SearchScope;
 
 public:
-    explicit SymbolsFindFilter(CppModelManager *manager);
+    SymbolsFindFilter();
 
     QString id() const override;
     QString displayName() const override;
@@ -65,7 +63,6 @@ private:
     QString toolTip(Utils::FindFlags findFlags) const;
     void startSearch(Core::SearchResult *search);
 
-    CppModelManager *m_manager;
     bool m_enabled;
     QMap<QFutureWatcher<Utils::SearchResultItem> *, QPointer<Core::SearchResult> > m_watchers;
     QPointer<Core::SearchResult> m_currentSearch;
diff --git a/src/plugins/debugger/analyzer/analyzerutils.cpp b/src/plugins/debugger/analyzer/analyzerutils.cpp
index dc87b2ad614..a2ea231755b 100644
--- a/src/plugins/debugger/analyzer/analyzerutils.cpp
+++ b/src/plugins/debugger/analyzer/analyzerutils.cpp
@@ -44,7 +44,7 @@ CPlusPlus::Symbol *AnalyzerUtils::findSymbolUnderCursor()
     const int pos = tc.position();
     widget->convertPosition(pos, &line, &column);
 
-    const CPlusPlus::Snapshot &snapshot = CppEditor::CppModelManager::instance()->snapshot();
+    const CPlusPlus::Snapshot &snapshot = CppEditor::CppModelManager::snapshot();
     CPlusPlus::Document::Ptr doc = snapshot.document(widget->textDocument()->filePath());
     QTC_ASSERT(doc, return nullptr);
 
diff --git a/src/plugins/debugger/cdb/cdbengine.cpp b/src/plugins/debugger/cdb/cdbengine.cpp
index b049d76f973..ccda790fe69 100644
--- a/src/plugins/debugger/cdb/cdbengine.cpp
+++ b/src/plugins/debugger/cdb/cdbengine.cpp
@@ -189,7 +189,7 @@ CdbEngine::CdbEngine() :
             this, &CdbEngine::updateLocals);
 
     if (s->useCodeModel.value())
-        m_codeModelSnapshot = CppEditor::CppModelManager::instance()->snapshot();
+        m_codeModelSnapshot = CppEditor::CppModelManager::snapshot();
 }
 
 void CdbEngine::init()
@@ -2500,7 +2500,7 @@ void CdbEngine::insertBreakpoint(const Breakpoint &bp)
     BreakpointParameters response = parameters;
     const QString responseId = breakPointCdbId(bp);
     QScopedPointer<BreakpointCorrectionContext> lineCorrection(
-                new BreakpointCorrectionContext(m_codeModelSnapshot, CppEditor::CppModelManager::instance()->workingCopy()));
+                new BreakpointCorrectionContext(m_codeModelSnapshot, CppEditor::CppModelManager::workingCopy()));
     if (!m_autoBreakPointCorrection
             && parameters.type == BreakpointByFileAndLine
             && debuggerSettings()->cdbBreakPointCorrection.value()) {
diff --git a/src/plugins/debugger/debuggerrunconfigurationaspect.cpp b/src/plugins/debugger/debuggerrunconfigurationaspect.cpp
index 8811934aee4..cc1c0b855c1 100644
--- a/src/plugins/debugger/debuggerrunconfigurationaspect.cpp
+++ b/src/plugins/debugger/debuggerrunconfigurationaspect.cpp
@@ -154,7 +154,7 @@ bool DebuggerRunConfigurationAspect::useCppDebugger() const
 
 static bool projectHasQmlDefines(ProjectExplorer::Project *project)
 {
-    auto projectInfo = CppEditor::CppModelManager::instance()->projectInfo(project);
+    auto projectInfo = CppEditor::CppModelManager::projectInfo(project);
     if (!projectInfo) // we may have e.g. a Python project
         return false;
     return Utils::anyOf(projectInfo->projectParts(),
diff --git a/src/plugins/debugger/sourceutils.cpp b/src/plugins/debugger/sourceutils.cpp
index 82f1929bb89..26bb70b43fd 100644
--- a/src/plugins/debugger/sourceutils.cpp
+++ b/src/plugins/debugger/sourceutils.cpp
@@ -223,7 +223,7 @@ QStringList getUninitializedVariables(const Snapshot &snapshot,
 
 QString cppFunctionAt(const FilePath &filePath, int line, int column)
 {
-    const Snapshot snapshot = CppModelManager::instance()->snapshot();
+    const Snapshot snapshot = CppModelManager::snapshot();
     if (const Document::Ptr document = snapshot.document(filePath))
         return document->functionAt(line, column);
 
@@ -240,7 +240,7 @@ QString cppExpressionAt(TextEditorWidget *editorWidget, int pos,
         function->clear();
 
     const FilePath filePath = editorWidget->textDocument()->filePath();
-    const Snapshot snapshot = CppModelManager::instance()->snapshot();
+    const Snapshot snapshot = CppModelManager::snapshot();
     const Document::Ptr document = snapshot.document(filePath);
     QTextCursor tc = editorWidget->textCursor();
     QString expr;
@@ -376,7 +376,7 @@ static void setValueAnnotationsHelper(BaseTextEditor *textEditor,
     TextEditorWidget *widget = textEditor->editorWidget();
     TextDocument *textDocument = widget->textDocument();
     const FilePath filePath = loc.fileName();
-    const Snapshot snapshot = CppModelManager::instance()->snapshot();
+    const Snapshot snapshot = CppModelManager::snapshot();
     const Document::Ptr cppDocument = snapshot.document(filePath);
     if (!cppDocument) // For non-C++ documents.
         return;
diff --git a/src/plugins/designer/codemodelhelpers.cpp b/src/plugins/designer/codemodelhelpers.cpp
index 8428fd98171..f58c3f65fb7 100644
--- a/src/plugins/designer/codemodelhelpers.cpp
+++ b/src/plugins/designer/codemodelhelpers.cpp
@@ -105,7 +105,7 @@ bool navigateToSlot(const QString &uiFileName,
         *errorMessage = Tr::tr("The generated header of the form \"%1\" could not be found.\nRebuilding the project might help.").arg(uiFileName);
         return false;
     }
-    const CPlusPlus::Snapshot snapshot = CppEditor::CppModelManager::instance()->snapshot();
+    const CPlusPlus::Snapshot snapshot = CppEditor::CppModelManager::snapshot();
     const DocumentPtr generatedHeaderDoc = snapshot.document(generatedHeaderFile);
     if (!generatedHeaderDoc) {
         *errorMessage = Tr::tr("The generated header \"%1\" could not be found in the code model.\nRebuilding the project might help.").arg(generatedHeaderFile.toUserOutput());
diff --git a/src/plugins/designer/qtcreatorintegration.cpp b/src/plugins/designer/qtcreatorintegration.cpp
index 58bb62258a3..fb4c1afd5d6 100644
--- a/src/plugins/designer/qtcreatorintegration.cpp
+++ b/src/plugins/designer/qtcreatorintegration.cpp
@@ -499,7 +499,7 @@ bool QtCreatorIntegration::navigateToSlot(const QString &objectName,
     const QString uicedName = "ui_" + fi.completeBaseName() + ".h";
 
     // Retrieve code model snapshot restricted to project of ui file or the working copy.
-    Snapshot docTable = CppEditor::CppModelManager::instance()->snapshot();
+    Snapshot docTable = CppEditor::CppModelManager::snapshot();
     Snapshot newDocTable;
     const Project *uiProject = ProjectManager::projectForFile(currentUiFile);
     if (uiProject) {
@@ -511,7 +511,7 @@ bool QtCreatorIntegration::navigateToSlot(const QString &objectName,
     } else {
         const FilePath configFileName = CppEditor::CppModelManager::configurationFileName();
         const CppEditor::WorkingCopy::Table elements =
-                CppEditor::CppModelManager::instance()->workingCopy().elements();
+                CppEditor::CppModelManager::workingCopy().elements();
         for (auto it = elements.cbegin(), end = elements.cend(); it != end; ++it) {
             const Utils::FilePath &fileName = it.key();
             if (fileName != configFileName)
@@ -578,7 +578,7 @@ bool QtCreatorIntegration::navigateToSlot(const QString &objectName,
     FilePath declFilePath;
     if (!fun) {
         // add function declaration to cl
-        CppEditor::WorkingCopy workingCopy = CppEditor::CppModelManager::instance()->workingCopy();
+        CppEditor::WorkingCopy workingCopy = CppEditor::CppModelManager::workingCopy();
         declFilePath = declDoc->filePath();
         getParsedDocument(declFilePath, workingCopy, docTable);
         addDeclaration(docTable, declFilePath, cl, functionNameWithParameterNames);
@@ -587,8 +587,8 @@ bool QtCreatorIntegration::navigateToSlot(const QString &objectName,
         QList<Utils::FilePath> filePaths;
         for (auto it = docTable.begin(); it != docTable.end(); ++it)
             filePaths << it.key();
-        workingCopy = CppEditor::CppModelManager::instance()->workingCopy();
-        docTable = CppEditor::CppModelManager::instance()->snapshot();
+        workingCopy = CppEditor::CppModelManager::workingCopy();
+        docTable = CppEditor::CppModelManager::snapshot();
         newDocTable = {};
         for (const auto &file : std::as_const(filePaths)) {
             const Document::Ptr doc = docTable.document(file);
@@ -742,7 +742,7 @@ void QtCreatorIntegration::handleSymbolRenameStage2(
     if (usesClangd)
         editorWidget->textDocument()->setFilePath(uiHeader);
     editorWidget->textDocument()->setPlainText(QString::fromUtf8(virtualContent));
-    Snapshot snapshot = CppEditor::CppModelManager::instance()->snapshot();
+    Snapshot snapshot = CppEditor::CppModelManager::snapshot();
     snapshot.remove(uiHeader);
     snapshot.remove(editor->textDocument()->filePath());
     const Document::Ptr cppDoc = snapshot.preprocessedDocument(virtualContent, uiHeader);
@@ -783,8 +783,8 @@ void QtCreatorIntegration::handleSymbolRenameStage2(
                 qCDebug(log) << "renaming with built-in code model";
                 snapshot.insert(cppDoc);
                 snapshot.updateDependencyTable();
-                CppEditor::CppModelManager::instance()->renameUsages(cppDoc, cursor, snapshot,
-                                                                     newName, callback);
+                CppEditor::CppModelManager::renameUsages(cppDoc, cursor, snapshot,
+                                                         newName, callback);
             }
             return;
         }
diff --git a/src/plugins/modeleditor/classviewcontroller.cpp b/src/plugins/modeleditor/classviewcontroller.cpp
index 68f5a66ae2a..16dcdb92d45 100644
--- a/src/plugins/modeleditor/classviewcontroller.cpp
+++ b/src/plugins/modeleditor/classviewcontroller.cpp
@@ -21,8 +21,7 @@ QSet<QString> ClassViewController::findClassDeclarations(const FilePath &filePat
 {
     QSet<QString> classNames;
 
-    CppEditor::CppModelManager *cppModelManager = CppEditor::CppModelManager::instance();
-    CPlusPlus::Snapshot snapshot = cppModelManager->snapshot();
+    CPlusPlus::Snapshot snapshot = CppEditor::CppModelManager::snapshot();
 
     // scan original file
     CPlusPlus::Document::Ptr document = snapshot.document(filePath);
diff --git a/src/plugins/modeleditor/componentviewcontroller.cpp b/src/plugins/modeleditor/componentviewcontroller.cpp
index 4071c5b0159..684d104fd9f 100644
--- a/src/plugins/modeleditor/componentviewcontroller.cpp
+++ b/src/plugins/modeleditor/componentviewcontroller.cpp
@@ -146,8 +146,7 @@ void UpdateIncludeDependenciesVisitor::updateFilePaths()
 
 void UpdateIncludeDependenciesVisitor::visitMComponent(qmt::MComponent *component)
 {
-    CppEditor::CppModelManager *cppModelManager = CppEditor::CppModelManager::instance();
-    CPlusPlus::Snapshot snapshot = cppModelManager->snapshot();
+    CPlusPlus::Snapshot snapshot = CppEditor::CppModelManager::snapshot();
 
     const QStringList filePaths = findFilePathOfComponent(component);
     for (const QString &filePath : filePaths) {
diff --git a/src/plugins/modeleditor/elementtasks.cpp b/src/plugins/modeleditor/elementtasks.cpp
index 6413686f61d..3cc271214fe 100644
--- a/src/plugins/modeleditor/elementtasks.cpp
+++ b/src/plugins/modeleditor/elementtasks.cpp
@@ -87,7 +87,7 @@ bool ElementTasks::hasClassDefinition(const qmt::MElement *element) const
     if (auto klass = dynamic_cast<const qmt::MClass *>(element)) {
         const QString qualifiedClassName = klass->umlNamespace().isEmpty() ? klass->name()
                                          : klass->umlNamespace() + "::" + klass->name();
-        auto *locatorData = CppModelManager::instance()->locatorData();
+        auto *locatorData = CppModelManager::locatorData();
         if (!locatorData)
             return false;
         const QList<IndexItem::Ptr> matches = locatorData->findSymbols(IndexItem::Class,
@@ -118,7 +118,7 @@ void ElementTasks::openClassDefinition(const qmt::MElement *element)
         const QString qualifiedClassName = klass->umlNamespace().isEmpty() ? klass->name()
                                          : klass->umlNamespace() + "::" + klass->name();
 
-        auto *locatorData = CppModelManager::instance()->locatorData();
+        auto *locatorData = CppModelManager::locatorData();
         if (!locatorData)
             return;
         const QList<IndexItem::Ptr> matches = locatorData->findSymbols(IndexItem::Class,
diff --git a/src/plugins/modeleditor/pxnodeutilities.cpp b/src/plugins/modeleditor/pxnodeutilities.cpp
index f9e8e3b034c..c9e58d5052e 100644
--- a/src/plugins/modeleditor/pxnodeutilities.cpp
+++ b/src/plugins/modeleditor/pxnodeutilities.cpp
@@ -216,8 +216,7 @@ qmt::MObject *PxNodeUtilities::findSameObject(const QStringList &relativeElement
 
 bool PxNodeUtilities::isProxyHeader(const QString &file) const
 {
-    CppEditor::CppModelManager *cppModelManager = CppEditor::CppModelManager::instance();
-    CPlusPlus::Snapshot snapshot = cppModelManager->snapshot();
+    CPlusPlus::Snapshot snapshot = CppEditor::CppModelManager::snapshot();
 
     CPlusPlus::Document::Ptr document = snapshot.document(Utils::FilePath::fromString(file));
     if (document) {
author	hjk <hjk@qt.io>	2023-07-12 09:47:29 +0200
committer	hjk <hjk@qt.io>	2023-07-12 13:08:09 +0000
commit	0b83f110f4ca1a620e8faf2db423886aab255602 (patch)
tree	278ae53b2dcf4ec2441a386626581e00e2a0b06e /src/plugins
parent	8f82e76ba1c4c3c05aa9e14c2c7937809ec775d2 (diff)