[clang-doc] account anonymous typedef

Author: PeterChou1

clang-tools-extra/clang-doc/Mapper.cpp

@@ -21,6 +21,16 @@ namespace doc {
 static llvm::StringSet USRVisited;
 static llvm::sys::Mutex USRVisitedGuard;
 
+
+template <typename T> bool isTypedefAnonRecord(const T* D) {
+  if (const auto *C = dyn_cast<CXXRecordDecl>(D)) {
+    if (const TypedefNameDecl *TD = C->getTypedefNameForAnonDecl()) {
+      return true;
+    }
+  }
+  return false;
+}
+
 void MapASTVisitor::HandleTranslationUnit(ASTContext &Context) {
   TraverseDecl(Context.getTranslationUnitDecl());
 }
@@ -44,7 +54,7 @@ template <typename T> bool MapASTVisitor::mapDecl(const T *D,
   {
     std::lock_guard<llvm::sys::Mutex> Guard(USRVisitedGuard);
     StringRef Visited = USR.str();
-    if (USRVisited.count(Visited))
+    if (USRVisited.count(Visited) && !isTypedefAnonRecord<T>(D))
       return true;
     // We considered a USR to be visited only when its defined
     if (IsDefinition)