1 // { dg-do assemble  }
2 // g++ 1.37.1 bug 900519_03
3 
4 // The C++ Reference Manual says (in section 8.4.3) "A reference to a
5 // volatile T can be initialized with a volatile T or a plain T but not a
6 // const T.  A reference to a const T can be initialized with a const T or
7 // a plain T or something that can be converted into a plain T, but not a
8 // volatile T."
9 
10 // g++ fails to disgnose such errors in most cases.
11 
12 // keywords: references, initialization, type qualifiers
13 
14 extern const int cint_obj;
15 extern volatile int vint_obj;
16 
take_cint_ref(const int & arg)17 void take_cint_ref (const int& arg) { }	// { dg-message "" }
take_vint_ref(volatile int & arg)18 void take_vint_ref (volatile int& arg) { } // { dg-message "" }
19 
20 const int& global_cint_ref2 = vint_obj;		// { dg-error "" }
21 
22 volatile int& global_vint_ref1 = cint_obj;	// { dg-error "" }
23 
24 extern const int& extern_cint_ref;
25 extern volatile int& extern_vint_ref;
26 
test_0()27 void test_0 ()
28 {
29   const int& local_cint_ref2 = vint_obj;	// { dg-error "" }
30 
31   volatile int& local_vint_ref1 = cint_obj;	// { dg-error "" }
32 }
33 
test_1()34 void test_1 ()
35 {
36   take_cint_ref (vint_obj);			// { dg-error "" }
37 
38   take_vint_ref (cint_obj);			// { dg-error "" } caught
39 }
40 
test_2()41 void test_2 ()
42 {
43   take_cint_ref (extern_vint_ref);		// { dg-error "" }
44 
45   take_vint_ref (extern_cint_ref);		// { dg-error "" }
46 }
47 
main()48 int main () { return 0; }
49