xref: /llvm-project/clang/test/SemaCXX/using-decl-templates.cpp (revision 4b52007c35d28d321e1e1b1d6df09d9df5558788)
1 // RUN: %clang_cc1 -fsyntax-only -verify %s
2 
3 template<typename T> struct A {
4   void f() { }
5   struct N { }; // expected-note{{target of using declaration}}
6 };
7 
8 template<typename T> struct B : A<T> {
9   using A<T>::f;
10   using A<T>::N; // expected-error{{dependent using declaration resolved to type without 'typename'}}
11 
12   using A<T>::foo; // expected-error{{no member named 'foo'}}
13   using A<double>::f; // expected-error{{using declaration refers into 'A<double>::', which is not a base class of 'B<int>'}}
14 };
15 
16 B<int> a; // expected-note{{in instantiation of template class 'B<int>' requested here}}
17 
18 template<typename T> struct C : A<T> {
19   using A<T>::f;
20 
21   void f() { };
22 };
23 
24 template <typename T> struct D : A<T> {
25   using A<T>::f;
26 
27   void f();
28 };
29 
30 template<typename T> void D<T>::f() { }
31 
32 template<typename T> struct E : A<T> {
33   using A<T>::f;
34 
35   void g() { f(); }
36 };
37 
38 namespace test0 {
39   struct Base {
40     int foo;
41   };
42   template<typename T> struct E : Base {
43     using Base::foo;
44   };
45 
46   template struct E<int>;
47 }
48 
49 // PR7896
50 namespace PR7896 {
51 template <class T> struct Foo {
52   int k (float);
53 };
54 struct Baz {
55   int k (int);
56 };
57 template <class T> struct Bar : public Foo<T>, Baz {
58   using Foo<T>::k;
59   using Baz::k;
60   int foo() {
61     return k (1.0f);
62   }
63 };
64 template int Bar<int>::foo();
65 }
66