RecursiveASTVisitor won't visit all declarations

Hi all,
I am having problems walking through the syntax tree of a simple header file. With llvm 4.0.1 everything works as expected but after upgrading to 7.0.0 I notice that just a small number of all declarations in the AST are being visited.

Running a simple ASTFrontendAction (like the one from this article - ) in HandleTranslationUnit() -

virtual void HandleTranslationUnit(ASTContext &Context) {
Decl* tu = Context.getTranslationUnitDecl();

when I dump the tu variable I get a lot smaller dump with 7.0.0. After investigating further I updated TraverseDeclContextHelper() method in order to print the size of decls() container for every DeclContext we visit:

bool RecursiveASTVisitor::TraverseDeclContextHelper(DeclContext *DC) {
if (!DC)
return true;

int childSize = 0; // my code

for (auto *Child : DC->decls()) {
childSize++; // my code
if (!canIgnoreChildDeclWhileTraversingDeclContext(Child))

std::cout << DC->getDeclKindName() << “: " << childSize << " child declarations” << “\n”; //my code

return true;

With llvm 4.0.0 I get:
TranslationUnit: 20526 child declarations

while with 7.0.0:
TranslationUnit: 486 child declarations

I created a sample project that illustrates this behavior - .

Any help tackling this issue is appreciated. Thank you.

Best wishes,
Teodor Dermendzhiev


I think it’s more suitable to ask this question on clang mailing list (cfe-dev)