Traversing CompoundStmt with non-type template parameter

Hi all,

I'm trying to visit "param" in context 2:

template<int param> // 1
class B
    static void hello() { printf("%d\n", param); } // 2

When I run clang -cc1 -ast-dump I get

template <int param> class B {
    class B;
    static void hello() (CompoundStmt 0x2918628 <class_template3.cpp:7:25, col:50>
  (CallExpr 0x29185b0 <col:27, col:47> 'int'
    (ImplicitCastExpr 0x2918598 <col:27> 'int (*)(const char *restrict, ...)' <FunctionToPointerDecay>
      (DeclRefExpr 0x2918510 <col:27> 'int (const char *restrict, ...)' lvalue Function 0x29079d0 'printf' 'int (const char *restrict, ...)'))
    (ImplicitCastExpr 0x2918610 <col:34> 'const char *' <ArrayToPointerDecay>
      (StringLiteral 0x29184b8 <col:34> 'const char [4]' lvalue "%d\n"))
    (DeclRefExpr 0x29184e8 <col:42> 'int' NonTypeTemplateParm 0x2917e70 'param' 'int')))

where (DeclRefExpr 0x29184e8 <col:42> 'int' NonTypeTemplateParm 0x2917e70 'param' 'int') is what I'm looking for.

However my reimplementation of VisitDeclRefExpr in RecursiveASTVisitor doesn't receive this DeclRefExpr.

Dumping TemplateDecl corresponding to B results in

template <int param> class B {
    class B;
    static void hello() (CompoundStmt 0x1f86430 <class_template3.cpp:7:25, col:50>)

i.e. CompoundStmt is not traversed. Its size() returns 0 and dump() doesn't show anything inside it. How do I traverse inside this CompoundStmt?

This is probably a symptom of missing a declaration for printf().
Check whether there were any errors in parsing.

Thank you very much!

It was the case indeed - stdio.h failed to include.