QDoc: Remove CodeParser from ClangCodeParser

`CodeParser` is a legacy inheritance-based interface for components that
needs to parse a source file.

Recent changes to the code-base moved some of those components to a new
interface so that `CodeParser` is not required anymore.

Hence stop `ClangCodeParser` from inheriting from `CodeParser`.

Some unused methods that were inherited from `CodeParser` and are unused
were removed.

`ClangCodeParser` makes use of a `QDocDatabase` that was previously
obtained from its parent class.
The dependencies is now made explicit and handled as part of the
constructor.

Task-number: QTBUG-111686
Change-Id: Ie4174175f669703cc1aa3fc954efe6f9a1314367
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>

3 files changed, 7 insertions, 29 deletions

diff --git a/src/qdoc/qdoc/src/qdoc/clangcodeparser.cpp b/src/qdoc/qdoc/src/qdoc/clangcodeparser.cpp
index 98c6fe44d..56a643541 100644
--- a/src/qdoc/qdoc/src/qdoc/clangcodeparser.cpp
+++ b/src/qdoc/qdoc/src/qdoc/clangcodeparser.cpp
@@ -1427,37 +1427,19 @@ Node *ClangVisitor::nodeForCommentAtLocation(CXSourceLocation loc, CXSourceLocat
 }
 
 ClangCodeParser::ClangCodeParser(
+    QDocDatabase* qdb,
     Config& config,
     const std::vector<QByteArray>& include_paths,
     const QList<QByteArray>& defines,
     std::optional<std::reference_wrapper<const PCHFile>> pch
-) : m_includePaths{include_paths},
+) : m_qdb{qdb},
+    m_includePaths{include_paths},
     m_defines{defines},
     m_pch{pch}
 {
     m_allHeaders = config.getHeaderFiles();
 }
 
-/*!
- */
-QString ClangCodeParser::language()
-{
-    return "Clang";
-}
-
-/*!
-  Returns a list of extensions for source files, i.e. not
-  header files.
- */
-QStringList ClangCodeParser::sourceFileNameFilter()
-{
-    return QStringList() << "*.c++"
-                         << "*.cc"
-                         << "*.cpp"
-                         << "*.cxx"
-                         << "*.mm";
-}
-
 static const char *defaultArgs_[] = {
 /*
   https://bugreports.qt.io/browse/QTBUG-94365
diff --git a/src/qdoc/qdoc/src/qdoc/clangcodeparser.h b/src/qdoc/qdoc/src/qdoc/clangcodeparser.h
index e6d78c719..0ae2bb788 100644
--- a/src/qdoc/qdoc/src/qdoc/clangcodeparser.h
+++ b/src/qdoc/qdoc/src/qdoc/clangcodeparser.h
@@ -64,25 +64,21 @@ private:
     std::optional<std::reference_wrapper<const PCHFile>> m_pch;
 };
 
-class ClangCodeParser : public CodeParser
+class ClangCodeParser
 {
 public:
     ClangCodeParser(
+        QDocDatabase* qdb,
         Config&,
         const std::vector<QByteArray>& include_paths,
         const QList<QByteArray>& defines,
         std::optional<std::reference_wrapper<const PCHFile>> pch
     );
-    ~ClangCodeParser() override = default;
 
-    void initializeParser() override {}
-    void terminateParser() override {}
-    QString language() override;
-    QStringList sourceFileNameFilter() override;
-    void parseSourceFile(const Location &, const QString &, CppCodeParser&) override {}
     ParsedCppFileIR parse_cpp_file(const QString &filePath);
 
 private:
+    QDocDatabase* m_qdb{};
     std::set<Config::HeaderFilePath> m_allHeaders {}; // file name->path
     const std::vector<QByteArray>& m_includePaths;
     QList<QByteArray> m_defines {};
diff --git a/src/qdoc/qdoc/src/qdoc/main.cpp b/src/qdoc/qdoc/src/qdoc/main.cpp
index 7753b9082..9620cb00a 100644
--- a/src/qdoc/qdoc/src/qdoc/main.cpp
+++ b/src/qdoc/qdoc/src/qdoc/main.cpp
@@ -511,7 +511,7 @@ static void processQdocconfFile(const QString &fileName)
         );
     }
 
-    ClangCodeParser clangParser(Config::instance(), include_paths, clang_defines, pch);
+    ClangCodeParser clangParser(QDocDatabase::qdocDB(), Config::instance(), include_paths, clang_defines, pch);
     PureDocParser docParser{config.location()};
 
     /*