29 void use(int);
31   use(Typedef().n);  in use_things()
32   use(NS::n);  in use_things()
33   use(AliasDecl);  in use_things()
34   use(UsingDecl);  in use_things()
35   use(RealNS::n);  in use_things()
36   use(Struct(0));  in use_things()
37   use(Variable);  in use_things()
38   use(AnotherNS);  in use_things()
39   use(Enumerator);  in use_things()
40   use(Overloads);  in use_things()
46   use(Typedef().n); // expected-error {{ambiguous}}  in use_things_again()
47   use(NS::n); // expected-error {{ambiguous}}  in use_things_again()
48   use(AliasDecl); // expected-error {{ambiguous}}  in use_things_again()
49   use(UsingDecl); // expected-error {{ambiguous}}  in use_things_again()
50   use(RealNS::n); // expected-error {{ambiguous}}  in use_things_again()
51   use(Struct(0)); // expected-error {{ambiguous}}  in use_things_again()
52   use(Variable); // expected-error {{ambiguous}}  in use_things_again()
53   use(AnotherNS); // expected-error {{ambiguous}}  in use_things_again()
54   use(Enumerator); // expected-error {{ambiguous}}  in use_things_again()
55   use(Overloads); // expected-error {{ambiguous}}  in use_things_again()