qdoc: ClangCodeParser: Remove unnecessary global nodes from the tree

  * Template argument deduction guides generate an entry in the Clang
    AST at global scope; ignore

  * Class constructors marked with constexpr generate a global instance;
    ignore.

Pick-to: 6.4
Change-Id: I0cbee1d86baa705407cf2cf9e2d19b2e9b9f35d7
Reviewed-by: Luca Di Sera <luca.disera@qt.io>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/qdoc/clangcodeparser.cpp b/src/qdoc/clangcodeparser.cpp
index 3cf930f36..8cb8a9056 100644
--- a/src/qdoc/clangcodeparser.cpp
+++ b/src/qdoc/clangcodeparser.cpp
@@ -457,6 +457,9 @@ private:
         // Ignore functions generated by property macros
         if (symbolName.startsWith("_qt_property_"))
             return true;
+        // Ignore template argument deduction guides
+        if (symbolName.startsWith("<deduction guide"))
+            return true;
         return false;
     }
 
@@ -690,6 +693,9 @@ CXChildVisitResult ClangVisitor::visitHeader(CXCursor cursor, CXSourceLocation l
         QString name = functionName(cursor);
         if (ignoredSymbol(name))
             return CXChildVisit_Continue;
+        // constexpr constructors generate also a global instance; ignore
+        if (kind == CXCursor_Constructor && parent_ == qdb_->primaryTreeRoot())
+            return CXChildVisit_Continue;
 
         auto *fn = new FunctionNode(parent_, name);
         CXSourceRange range = clang_Cursor_getCommentRange(cursor);