1 // PR c++/65051
2 
3 template<typename T> struct wrap { typedef T type; };
4 template <class T> class rv: public wrap <T>::type {};
5 
6 template <class value_type>
7 struct circular_buffer
8 {
9     typedef const value_type& param_value_type;
10     typedef rv< value_type >& rvalue_type;
11 
push_backcircular_buffer12     void push_back(param_value_type item) {}
push_backcircular_buffer13     void push_back(rvalue_type item) {}
14 };
15 
16 union U { int i; char c; };
17 
f(circular_buffer<U> b,const U & u)18 void f(circular_buffer<U> b, const U& u) { b.push_back(u); }
19