// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
// RUN: %clang_cc1 -std=c++20 -fsyntax-only -verify %s

// Member function declarations with the same name and the same
// parameter-type-list as well as mem- ber function template
// declarations with the same name, the same parameter-type-list, and
// the same template parameter lists cannot be overloaded if any of
// them, but not all, have a ref-qualifier (8.3.5).

class Y { 
  void h() &; 
  void h() const &; 
  void h() &&; 
  void i() &; // expected-note{{previous declaration}}
  void i() const; // expected-error{{cannot overload a member function without a ref-qualifier with a member function with ref-qualifier '&'}}

  template<typename T> void f(T*) &;
  template<typename T> void f(T*) &&;

  template<typename T> void g(T*) &; // expected-note{{previous declaration}}
  template<typename T> void g(T*); // expected-error{{cannot overload a member function without a ref-qualifier with a member function with ref-qualifier '&'}}

  void k(); // expected-note{{previous declaration}}
  void k() &&; // expected-error{{cannot overload a member function with ref-qualifier '&&' with a member function without a ref-qualifier}}
};


#if __cplusplus >= 202002L
namespace GH58962 {

template<typename T>
__add_rvalue_reference(T) declval();

template<unsigned R>
struct type
{
    void func() requires (R == 0);
    void func() & requires (R == 1);
    void func() && requires (R == 2);
};

template<typename T>
concept test = requires { declval<T>().func(); };

static_assert(test<type<0>&>);
static_assert(test<type<0>&&>);
static_assert(test<type<1>&>);
static_assert(not test<type<1>&&>);
static_assert(not test<type<2>&>);
static_assert(test<type<2>&&>);

}
#endif