1 | // RUN: %clang_cc1 -fsyntax-only -std=c++11 -verify %s |
2 | // RUN: %clang_cc1 -fsyntax-only -std=c++1y -verify %s -DCXX1Y |
3 | |
4 | #ifndef CXX1Y |
5 | |
6 | template<typename T, typename U, U> using alias_ref = T; |
7 | template<typename T, typename U, U> void func_ref() {} |
8 | template<typename T, typename U, U> struct class_ref {}; |
9 | |
10 | template<int N> |
11 | struct U { |
12 | static int a; |
13 | }; |
14 | |
15 | template<int N> struct S; // expected-note 6{{here}} |
16 | |
17 | template<int N> |
18 | int U<N>::a = S<N>::kError; // expected-error 6{{undefined}} |
19 | |
20 | template<typename T> |
21 | void f() { |
22 | (void)alias_ref<int, int&, U<0>::a>(); // expected-note {{here}} |
23 | (void)func_ref<int, int&, U<1>::a>(); // expected-note {{here}} |
24 | (void)class_ref<int, int&, U<2>::a>(); // expected-note {{here}} |
25 | }; |
26 | |
27 | template<typename T> |
28 | void not_instantiated() { |
29 | // These cases (arguably) do not require instantiation of U<i>::a. |
30 | (void)alias_ref<int, int&, U<3>::a>(); |
31 | (void)func_ref<int, int&, U<4>::a>(); |
32 | (void)class_ref<int, int&, U<5>::a>(); |
33 | }; |
34 | |
35 | template<int N> |
36 | void fi() { |
37 | (void)alias_ref<int, int&, U<N>::a>(); // expected-note {{here}} |
38 | (void)func_ref<int, int&, U<N+1>::a>(); // expected-note {{here}} |
39 | (void)class_ref<int, int&, U<N+2>::a>(); // expected-note {{here}} |
40 | }; |
41 | |
42 | int main() { |
43 | f<int>(); // expected-note 3{{here}} |
44 | fi<10>(); // expected-note 3{{here}} |
45 | } |
46 | |
47 | namespace N { |
48 | template<typename T> struct S { static int n; }; |
49 | template<typename T> int S<T>::n = 5; |
50 | void g(int*); |
51 | template<typename T> int f() { |
52 | int k[S<T>::n]; |
53 | g(k); |
54 | return k[3]; |
55 | } |
56 | int j = f<int>(); |
57 | } |
58 | |
59 | #else |
60 | // expected-no-diagnostics |
61 | |
62 | namespace { template<typename> extern int n; } |
63 | template<typename T> int g() { return n<int>; } |
64 | namespace { extern template int n<int>; } |
65 | |
66 | #endif |
67 | |
68 | |