1// { dg-do compile }
2template<class T> class intrusive_ptr {
3public:
4    ~intrusive_ptr() { intrusive_ptr_release( px ); }
5    T * px;
6};
7template <typename T>     struct intrusive_base     {
8    friend void intrusive_ptr_release(T* ptr) { delete ptr; }
9};
10struct section_info;
11struct file_info : intrusive_base<file_info> {
12    intrusive_ptr<file_info> parent;
13    intrusive_ptr<section_info> switched_section;
14};
15struct section_info : intrusive_base<section_info> {
16    intrusive_ptr<section_info> parent;
17};
18struct id_state {
19    void * start_file(void);
20};
21void * id_state::start_file(void) {
22    intrusive_ptr<file_info> parent;
23}
24struct id_generation_data : intrusive_base<id_generation_data> {
25    void child_length() const {}
26};
27void generate_id(id_generation_data& generation_data)
28{
29  generation_data.child_length();
30}
31