ClangCodeModel: Implement declaration/definition switch via clangd

Change-Id: I522a415d76fbc5332e5cc1fdfd2d7ab19cb9ed64
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/clangcodemodel/clangdclient.cpp

@@ -230,7 +230,8 @@ public:
     void print(int indent = 0) const
     {
         (qDebug().noquote() << QByteArray(indent, ' ')).quote() << role() << kind()
-                 << detail().value_or(QString()) << arcana().value_or(QString());
+                 << detail().value_or(QString()) << arcana().value_or(QString())
+                 << range();
         for (const AstNode &c : children().value_or(QList<AstNode>()))
             c.print(indent + 2);
     }
@@ -512,6 +513,58 @@ public:
     VirtualFunctionAssistProcessor *virtualFuncAssistProcessor = nullptr;
 };
 
+class SwitchDeclDefData {
+public:
+    SwitchDeclDefData(quint64 id, TextEditor::TextDocument *doc, const QTextCursor &cursor,
+                      CppTools::CppEditorWidgetInterface *editorWidget,
+                      Utils::ProcessLinkCallback &&callback)
+        : id(id), document(doc), uri(DocumentUri::fromFilePath(doc->filePath())),
+          cursor(cursor), editorWidget(editorWidget), callback(std::move(callback)) {}
+
+    Utils::optional<AstNode> getFunctionNode() const
+    {
+        QTC_ASSERT(ast, return {});
+
+        const QList<AstNode> path = getAstPath(*ast, Range(cursor));
+        for (auto it = path.rbegin(); it != path.rend(); ++it) {
+            if (it->role() == "declaration"
+                    && (it->kind() == "CXXMethod" || it->kind() == "CXXConversion"
+                        || it->kind() == "CXXConstructor" || it->kind() == "CXXDestructor")) {
+                return *it;
+            }
+        }
+        return {};
+    }
+
+    QTextCursor cursorForFunctionName(const AstNode &functionNode) const
+    {
+        QTC_ASSERT(docSymbols, return {});
+
+        const auto symbolList = Utils::get_if<QList<DocumentSymbol>>(&*docSymbols);
+        if (!symbolList)
+            return {};
+        const Range &astRange = functionNode.range();
+        QList symbolsToCheck = *symbolList;
+        while (!symbolsToCheck.isEmpty()) {
+            const DocumentSymbol symbol = symbolsToCheck.takeFirst();
+            if (symbol.range() == astRange)
+                return symbol.selectionRange().start().toTextCursor(document->document());
+            if (symbol.range().contains(astRange))
+                symbolsToCheck << symbol.children().value_or(QList<DocumentSymbol>());
+        }
+        return {};
+    }
+
+    const quint64 id;
+    const QPointer<TextEditor::TextDocument> document;
+    const DocumentUri uri;
+    const QTextCursor cursor;
+    CppTools::CppEditorWidgetInterface * const editorWidget;
+    Utils::ProcessLinkCallback callback;
+    Utils::optional<DocumentSymbolsResult> docSymbols;
+    Utils::optional<AstNode> ast;
+};
+
 
 class ClangdClient::Private
 {
@@ -535,12 +588,16 @@ public:
     void handleDocumentInfoResults();
     void closeTempDocuments();
 
+    void handleDeclDefSwitchReplies();
+
     ClangdClient * const q;
     QHash<quint64, ReferencesData> runningFindUsages;
     Utils::optional<FollowSymbolData> followSymbolData;
+    Utils::optional<SwitchDeclDefData> switchDeclDefData;
     Utils::optional<QVersionNumber> versionNumber;
     quint64 nextFindUsagesKey = 0;
     quint64 nextFollowSymbolId = 0;
+    quint64 nextSwitchDeclDefId = 0;
     bool isFullyIndexed = false;
     bool isTesting = false;
 };
@@ -555,7 +612,6 @@ ClangdClient::ClangdClient(Project *project, const Utils::FilePath &jsonDbDir)
     setSupportedLanguage(langFilter);
     LanguageServerProtocol::ClientCapabilities caps = Client::defaultClientCapabilities();
     caps.clearExperimental();
-    caps.clearTextDocument();
     setClientCapabilities(caps);
     setLocatorsEnabled(false);
     setProgressTitleForToken(indexingToken(), tr("Parsing C/C++ Files (clangd)"));
@@ -581,6 +637,15 @@ ClangdClient::ClangdClient(Project *project, const Utils::FilePath &jsonDbDir)
         QTC_CHECK(d->runningFindUsages.isEmpty());
     });
 
+    connect(documentSymbolCache(), &DocumentSymbolCache::gotSymbols, this,
+            [this](const DocumentUri &uri, const DocumentSymbolsResult &symbols) {
+        if (!d->switchDeclDefData || d->switchDeclDefData->uri != uri)
+            return;
+        d->switchDeclDefData->docSymbols = symbols;
+        if (d->switchDeclDefData->ast)
+            d->handleDeclDefSwitchReplies();
+    });
+
     start();
 }
 
@@ -943,6 +1008,42 @@ void ClangdClient::followSymbol(
     sendContent(astRequest);
 }
 
+void ClangdClient::switchDeclDef(TextEditor::TextDocument *document, const QTextCursor &cursor,
+                                 CppTools::CppEditorWidgetInterface *editorWidget,
+                                 Utils::ProcessLinkCallback &&callback)
+{
+    QTC_ASSERT(documentOpen(document), openDocument(document));
+
+    qCDebug(clangdLog) << "switch decl/dev requested" << document->filePath()
+                       << cursor.blockNumber() << cursor.positionInBlock();
+    d->switchDeclDefData.emplace(++d->nextSwitchDeclDefId, document, cursor, editorWidget,
+                                 std::move(callback));
+
+    // Retrieve AST and document symbols.
+    AstParams astParams;
+    astParams.setTextDocument(TextDocumentIdentifier(d->switchDeclDefData->uri));
+    AstRequest astRequest(astParams);
+    astRequest.setResponseCallback([this, id = d->switchDeclDefData->id]
+                                   (const AstRequest::Response &response) {
+        qCDebug(clangdLog) << "received ast for decl/def switch";
+        if (!d->switchDeclDefData || d->switchDeclDefData->id != id
+                || !d->switchDeclDefData->document)
+            return;
+        const auto result = response.result();
+        if (!result) {
+            d->switchDeclDefData.reset();
+            return;
+        }
+        d->switchDeclDefData->ast = *result;
+        if (d->switchDeclDefData->docSymbols)
+            d->handleDeclDefSwitchReplies();
+
+    });
+    sendContent(astRequest);
+    documentSymbolCache()->requestSymbols(d->switchDeclDefData->uri);
+
+}
+
 void ClangdClient::Private::handleGotoDefinitionResult()
 {
     QTC_ASSERT(followSymbolData->defLink.hasValidTarget(), return);
@@ -1144,6 +1245,35 @@ void ClangdClient::Private::handleDocumentInfoResults()
     followSymbolData->virtualFuncAssistProcessor->finalize();
 }
 
+void ClangdClient::Private::handleDeclDefSwitchReplies()
+{
+    if (!switchDeclDefData->document) {
+        switchDeclDefData.reset();
+        return;
+    }
+
+    // Find the function declaration or definition associated with the cursor.
+    // For instance, the cursor could be somwehere inside a function body or
+    // on a function return type, or ...
+    if (clangdLog().isDebugEnabled())
+        switchDeclDefData->ast->print(0);
+    const Utils::optional<AstNode> functionNode = switchDeclDefData->getFunctionNode();
+    if (!functionNode) {
+        switchDeclDefData.reset();
+        return;
+    }
+
+    // Unfortunately, the AST does not contain the location of the actual function name symbol,
+    // so we have to look for it in the document symbols.
+    const QTextCursor funcNameCursor = switchDeclDefData->cursorForFunctionName(*functionNode);
+    if (!funcNameCursor.isNull()) {
+        q->followSymbol(switchDeclDefData->document.data(), funcNameCursor,
+                        switchDeclDefData->editorWidget, std::move(switchDeclDefData->callback),
+                        true, false);
+    }
+    switchDeclDefData.reset();
+}
+
 void ClangdClient::VirtualFunctionAssistProcessor::cancel()
 {
     if (!m_data)

src/plugins/clangcodemodel/clangdclient.h

@@ -61,6 +61,11 @@ public:
             bool resolveTarget,
             bool openInSplit);
 
+    void switchDeclDef(TextEditor::TextDocument *document,
+            const QTextCursor &cursor,
+            CppTools::CppEditorWidgetInterface *editorWidget,
+            Utils::ProcessLinkCallback &&callback);
+
     void enableTesting();
 
 signals:

src/plugins/clangcodemodel/clangfollowsymbol.cpp

@@ -251,5 +251,23 @@ void ClangFollowSymbol::findLink(const CppTools::CursorInEditor &data,
     m_watcher->setFuture(infoFuture);
 }
 
+void ClangFollowSymbol::switchDeclDef(const CppTools::CursorInEditor &data,
+                                      Utils::ProcessLinkCallback &&processLinkCallback,
+                                      const CPlusPlus::Snapshot &snapshot,
+                                      const CPlusPlus::Document::Ptr &documentFromSemanticInfo,
+                                      CppTools::SymbolFinder *symbolFinder)
+{
+    ClangdClient * const client
+            = ClangModelManagerSupport::instance()->clientForFile(data.filePath());
+    if (client && client->isFullyIndexed() && client->versionNumber() >= QVersionNumber(13)) {
+        client->switchDeclDef(data.textDocument(), data.cursor(), data.editorWidget(),
+                              std::move(processLinkCallback));
+        return;
+    }
+    CppTools::CppModelManager::builtinFollowSymbol().switchDeclDef(
+                data, std::move(processLinkCallback), snapshot, documentFromSemanticInfo,
+                symbolFinder);
+}
+
 } // namespace Internal
 } // namespace ClangCodeModel

src/plugins/clangcodemodel/clangfollowsymbol.h

@@ -43,9 +43,17 @@ public:
                   const CPlusPlus::Document::Ptr &documentFromSemanticInfo,
                   CppTools::SymbolFinder *symbolFinder,
                   bool inNextSplit) override;
+
+    void switchDeclDef(const CppTools::CursorInEditor &data,
+                       Utils::ProcessLinkCallback &&processLinkCallback,
+                       const CPlusPlus::Snapshot &snapshot,
+                       const CPlusPlus::Document::Ptr &documentFromSemanticInfo,
+                       CppTools::SymbolFinder *symbolFinder) override;
+
 private:
     using FutureSymbolWatcher = QFutureWatcher<CppTools::SymbolInfo>;
     std::unique_ptr<FutureSymbolWatcher> m_watcher;
+
 };
 
 } // namespace Internal

src/plugins/cppeditor/cppeditorwidget.cpp

@@ -711,78 +711,15 @@ void CppEditorWidget::switchDeclarationDefinition(bool inNextSplit)
     if (!d->m_modelManager)
         return;
 
-    if (!d->m_lastSemanticInfo.doc)
-        return;
-
-    // Find function declaration or definition under cursor
-    Function *functionDefinitionSymbol = nullptr;
-    Symbol *functionDeclarationSymbol = nullptr;
-    Symbol *declarationSymbol = nullptr;
-
-    ASTPath astPathFinder(d->m_lastSemanticInfo.doc);
-    const QList<AST *> astPath = astPathFinder(textCursor());
-
-    for (AST *ast : astPath) {
-        if (FunctionDefinitionAST *functionDefinitionAST = ast->asFunctionDefinition()) {
-            if ((functionDefinitionSymbol = functionDefinitionAST->symbol))
-                break; // Function definition found!
-        } else if (SimpleDeclarationAST *simpleDeclaration = ast->asSimpleDeclaration()) {
-            if (List<Symbol *> *symbols = simpleDeclaration->symbols) {
-                if (Symbol *symbol = symbols->value) {
-                    if (symbol->isDeclaration()) {
-                        declarationSymbol = symbol;
-                        if (symbol->type()->isFunctionType()) {
-                            functionDeclarationSymbol = symbol;
-                            break; // Function declaration found!
-                        }
-                    }
-                }
-            }
-        }
-    }
-
-    // Link to function definition/declaration
-    Utils::Link symbolLink;
-    if (functionDeclarationSymbol) {
-        Symbol *symbol = d->m_modelManager->symbolFinder()
-                ->findMatchingDefinition(functionDeclarationSymbol, d->m_modelManager->snapshot());
-        if (symbol)
-            symbolLink = symbol->toLink();
-    } else if (declarationSymbol) {
-        Symbol *symbol = d->m_modelManager->symbolFinder()
-                ->findMatchingVarDefinition(declarationSymbol, d->m_modelManager->snapshot());
-        if (symbol)
-            symbolLink = symbol->toLink();
-    } else if (functionDefinitionSymbol) {
-        const Snapshot snapshot = d->m_modelManager->snapshot();
-        LookupContext context(d->m_lastSemanticInfo.doc, snapshot);
-        ClassOrNamespace *binding = context.lookupType(functionDefinitionSymbol);
-        const QList<LookupItem> declarations
-            = context.lookup(functionDefinitionSymbol->name(),
-                             functionDefinitionSymbol->enclosingScope());
-
-        QList<Symbol *> best;
-        foreach (const LookupItem &r, declarations) {
-            if (Symbol *decl = r.declaration()) {
-                if (Function *funTy = decl->type()->asFunctionType()) {
-                    if (funTy->match(functionDefinitionSymbol)) {
-                        if (decl != functionDefinitionSymbol && binding == r.binding())
-                            best.prepend(decl);
-                        else
-                            best.append(decl);
-                    }
-                }
-            }
-        }
-
-        if (best.isEmpty())
-            return;
-        symbolLink = best.first()->toLink();
-    }
-
-    // Open Editor at link position
-    if (symbolLink.hasValidTarget())
-        openLink(symbolLink, inNextSplit != alwaysOpenLinksInNextSplit());
+    const CursorInEditor cursor(textCursor(), textDocument()->filePath(), this, textDocument());
+    auto callback = [self = QPointer(this),
+            split = inNextSplit != alwaysOpenLinksInNextSplit()](const Link &link) {
+        if (self && link.hasValidTarget())
+            self->openLink(link, split);
+    };
+    followSymbolInterface().switchDeclDef(cursor, std::move(callback),
+                                          d->m_modelManager->snapshot(), d->m_lastSemanticInfo.doc,
+                                          d->m_modelManager->symbolFinder());
 }
 
 void CppEditorWidget::findLinkAt(const QTextCursor &cursor,

src/plugins/cppeditor/followsymbol_switchmethoddecldef_test.cpp

@@ -297,14 +297,12 @@ F2TestCase::F2TestCase(CppEditorAction action,
             QSKIP("fuzzy matching is not supposed to work with clangd"); // TODO: Implement fallback as we do with libclang
         if (tag == "baseClassFunctionIntroducedByUsingDeclaration")
             QSKIP("clangd points to the using declaration");
-        if (tag == "classDestructor")
+        if (tag == "classDestructor" || tag == "fromDestructorDefinitionSymbol"
+                || tag == "fromDestructorBody") {
             QSKIP("clangd wants the cursor before the ~ character");
+        }
         if (curTestName == "test_FollowSymbolUnderCursor_classOperator_inOp")
             QSKIP("clangd goes to operator name first");
-        if (tag == "fromFunctionBody" || tag == "fromReturnType"
-                || tag == "conversionOperatorDecl2Def") {
-            QSKIP("TODO: explicit decl/def switch not yet supported with clangd");
-        }
     }
 
     // Write files to disk
@@ -415,7 +413,9 @@ F2TestCase::F2TestCase(CppEditorAction action,
         break;
     }
     case SwitchBetweenMethodDeclarationDefinitionAction:
-        if (CppTools::codeModelSettings()->useClangd())
+        // Some test cases were erroneously added as decl/def, but they are really
+        // follow symbol functionality (in commit a0764603d0).
+        if (useClangd && tag.endsWith("Var"))
             initialTestFile->m_editorWidget->openLinkUnderCursor();
         else
             CppEditorPlugin::instance()->switchDeclarationDefinition();
@@ -623,6 +623,126 @@ void CppEditorPlugin::test_SwitchMethodDeclarationDefinition_data()
         "}\n"                   // Line 10
     );
 
+    QTest::newRow("fromConstructorDeclarationSymbol") << _(
+        "class C\n"
+        "{\n"
+        "public:\n"
+        "    C();\n"
+        "    int @function();\n"  // Line 5
+        "};\n"
+        ) << _(
+        "#include \"file.h\"\n"
+        "\n"
+        "C::C()\n"
+        "{\n"
+        "}\n"                   // Line 5
+        "\n"
+        "int C::$function()\n"
+        "{\n"
+        "    return 1 + 1;\n"
+        "}\n"                   // Line 10
+        );
+
+    QTest::newRow("fromConstructorDefinitionSymbol") << _(
+        "class C\n"
+        "{\n"
+        "public:\n"
+        "    $C();\n"
+        "    int function();\n"
+        "};\n"
+        ) << _(
+        "#include \"file.h\"\n"
+        "\n"
+        "C::@C()\n"
+        "{\n"
+        "}\n"
+        "\n"
+        "int C::function()\n"
+        "{\n"
+        "    return 1 + 1;\n"
+        "}\n"
+        );
+
+    QTest::newRow("fromConstructorBody") << _(
+        "class C\n"
+        "{\n"
+        "public:\n"
+        "    $C();\n"
+        "    int function();\n"
+        "};\n"
+        ) << _(
+        "#include \"file.h\"\n"
+        "\n"
+        "C::C()\n"
+        "{@\n"
+        "}\n"                   // Line 5
+        "\n"
+        "int C::function()\n"
+        "{\n"
+        "    return 1 + 1;\n"
+        "}\n"                   // Line 10
+        );
+
+    QTest::newRow("fromDestructorDeclarationSymbol") << _(
+        "class C\n"
+        "{\n"
+        "public:\n"
+        "    @C();\n"
+        "    int function();\n"  // Line 5
+        "};\n"
+        ) << _(
+        "#include \"file.h\"\n"
+        "\n"
+        "C::$C()\n"
+        "{\n"
+        "}\n"                   // Line 5
+        "\n"
+        "int C::function()\n"
+        "{\n"
+        "    return 1 + 1;\n"
+        "}\n"                   // Line 10
+        );
+
+    QTest::newRow("fromDestructorDefinitionSymbol") << _(
+        "class C\n"
+        "{\n"
+        "public:\n"
+        "    ~$C();\n"
+        "    int function();\n"
+        "};\n"
+        ) << _(
+        "#include \"file.h\"\n"
+        "\n"
+        "C::@~C()\n"
+        "{\n"
+        "}\n"
+        "\n"
+        "int C::function()\n"
+        "{\n"
+        "    return 1 + 1;\n"
+        "}\n"
+        );
+
+    QTest::newRow("fromDestructorBody") << _(
+        "class C\n"
+        "{\n"
+        "public:\n"
+        "    ~$C();\n"
+        "    int function();\n"
+        "};\n"
+        ) << _(
+        "#include \"file.h\"\n"
+        "\n"
+        "C::~C()\n"
+        "{@\n"
+        "}\n"                   // Line 5
+        "\n"
+        "int C::function()\n"
+        "{\n"
+        "    return 1 + 1;\n"
+        "}\n"                   // Line 10
+        );
+
     QTest::newRow("fromReturnType") << _(
         "class C\n"
         "{\n"

src/plugins/cpptools/cppfollowsymbolundercursor.cpp

@@ -796,6 +796,83 @@ void FollowSymbolUnderCursor::findLink(
     processLinkCallback(Link());
 }
 
+void FollowSymbolUnderCursor::switchDeclDef(
+        const CursorInEditor &data,
+        Utils::ProcessLinkCallback &&processLinkCallback,
+        const CPlusPlus::Snapshot &snapshot,
+        const CPlusPlus::Document::Ptr &documentFromSemanticInfo,
+        SymbolFinder *symbolFinder)
+{
+    if (!documentFromSemanticInfo) {
+        processLinkCallback({});
+        return;
+    }
+
+    // Find function declaration or definition under cursor
+    Function *functionDefinitionSymbol = nullptr;
+    Symbol *functionDeclarationSymbol = nullptr;
+    Symbol *declarationSymbol = nullptr;
+
+    ASTPath astPathFinder(documentFromSemanticInfo);
+    const QList<AST *> astPath = astPathFinder(data.cursor());
+
+    for (AST *ast : astPath) {
+        if (FunctionDefinitionAST *functionDefinitionAST = ast->asFunctionDefinition()) {
+            if ((functionDefinitionSymbol = functionDefinitionAST->symbol))
+                break; // Function definition found!
+        } else if (SimpleDeclarationAST *simpleDeclaration = ast->asSimpleDeclaration()) {
+            if (List<Symbol *> *symbols = simpleDeclaration->symbols) {
+                if (Symbol *symbol = symbols->value) {
+                    if (symbol->isDeclaration()) {
+                        declarationSymbol = symbol;
+                        if (symbol->type()->isFunctionType()) {
+                            functionDeclarationSymbol = symbol;
+                            break; // Function declaration found!
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    // Link to function definition/declaration
+    Utils::Link symbolLink;
+    if (functionDeclarationSymbol) {
+        Symbol *symbol = symbolFinder->findMatchingDefinition(functionDeclarationSymbol, snapshot);
+        if (symbol)
+            symbolLink = symbol->toLink();
+    } else if (declarationSymbol) {
+        Symbol *symbol = symbolFinder->findMatchingVarDefinition(declarationSymbol, snapshot);
+        if (symbol)
+            symbolLink = symbol->toLink();
+    } else if (functionDefinitionSymbol) {
+        LookupContext context(documentFromSemanticInfo, snapshot);
+        ClassOrNamespace *binding = context.lookupType(functionDefinitionSymbol);
+        const QList<LookupItem> declarations
+            = context.lookup(functionDefinitionSymbol->name(),
+                             functionDefinitionSymbol->enclosingScope());
+
+        QList<Symbol *> best;
+        foreach (const LookupItem &r, declarations) {
+            if (Symbol *decl = r.declaration()) {
+                if (Function *funTy = decl->type()->asFunctionType()) {
+                    if (funTy->match(functionDefinitionSymbol)) {
+                        if (decl != functionDefinitionSymbol && binding == r.binding())
+                            best.prepend(decl);
+                        else
+                            best.append(decl);
+                    }
+                }
+            }
+        }
+
+        if (best.isEmpty())
+            return;
+        symbolLink = best.first()->toLink();
+    }
+    processLinkCallback(symbolLink);
+}
+
 QSharedPointer<VirtualFunctionAssistProvider> FollowSymbolUnderCursor::virtualFunctionAssistProvider()
 {
     return m_virtualFunctionAssistProvider;

src/plugins/cpptools/cppfollowsymbolundercursor.h

@@ -44,6 +44,12 @@ public:
                   CppTools::SymbolFinder *symbolFinder,
                   bool inNextSplit) override;
 
+    void switchDeclDef(const CursorInEditor &data,
+                       Utils::ProcessLinkCallback &&processLinkCallback,
+                       const CPlusPlus::Snapshot &snapshot,
+                       const CPlusPlus::Document::Ptr &documentFromSemanticInfo,
+                       SymbolFinder *symbolFinder) override;
+
     QSharedPointer<VirtualFunctionAssistProvider> virtualFunctionAssistProvider();
     void setVirtualFunctionAssistProvider(
             const QSharedPointer<VirtualFunctionAssistProvider> &provider);

src/plugins/cpptools/cppmodelmanager.cpp

@@ -472,6 +472,11 @@ RefactoringEngineInterface *CppModelManager::builtinRefactoringEngine()
     return instance()->d->m_refactoringEngines.value(RefactoringEngineType::BuiltIn);
 }
 
+FollowSymbolInterface &CppModelManager::builtinFollowSymbol()
+{
+    return instance()->d->m_builtinModelManagerSupport->followSymbolInterface();
+}
+
 template<class FilterClass>
 static void setFilter(std::unique_ptr<FilterClass> &filter,
                       std::unique_ptr<FilterClass> &&newFilter)

src/plugins/cpptools/cppmodelmanager.h

@@ -218,6 +218,7 @@ public:
                                      RefactoringEngineInterface *refactoringEngine);
     static void removeRefactoringEngine(RefactoringEngineType type);
     static RefactoringEngineInterface *builtinRefactoringEngine();
+    static FollowSymbolInterface &builtinFollowSymbol();
 
     void setLocatorFilter(std::unique_ptr<Core::ILocatorFilter> &&filter);
     void setClassesFilter(std::unique_ptr<Core::ILocatorFilter> &&filter);

src/plugins/cpptools/followsymbolinterface.h

@@ -49,6 +49,11 @@ public:
                           const CPlusPlus::Document::Ptr &documentFromSemanticInfo,
                           SymbolFinder *symbolFinder,
                           bool inNextSplit) = 0;
+    virtual void switchDeclDef(const CursorInEditor &data,
+                               Utils::ProcessLinkCallback &&processLinkCallback,
+                               const CPlusPlus::Snapshot &snapshot,
+                               const CPlusPlus::Document::Ptr &documentFromSemanticInfo,
+                               SymbolFinder *symbolFinder) = 0;
 };
 
 } // namespace CppTools