1 // RUN: rm -rf %t
2 // RUN: mkdir %t
3 // RUN: split-file %s %t
4 //
5 // RUN: %clang_cc1 -std=c++20 %t/foo.cppm -I%t -emit-module-interface -o %t/foo.pcm
6 // RUN: %clang_cc1 -fprebuilt-module-path=%t -std=c++20 %t/use.cpp -fsyntax-only -verify
7 
8 //--- foo.cppm
9 export module foo;
10 export template <typename T = int>
11 T v;
12 
13 export template <int T = 8>
14 int v2;
15 
16 export template <typename T>
17 class my_array {};
18 
19 export template <template <typename> typename C = my_array>
20 int v3;
21 
22 //--- use.cpp
23 import foo;
24 template <typename T = int>
25 T v; // expected-error {{declaration of 'v' in the global module follows declaration in module foo}}
26      // [email protected]:3 {{previous declaration is here}}
27 
28 template <int T = 8>
29 int v2; // expected-error {{declaration of 'v2' in the global module follows declaration in module foo}}
30         // [email protected]:6 {{previous declaration is here}}
31 
32 template <typename T>
33 class my_array {}; // expected-error {{redefinition of 'my_array'}}
34                    // [email protected]:9 {{previous definition is here}}
35 
36 template <template <typename> typename C = my_array>
37 int v3; // expected-error {{declaration of 'v3' in the global module follows declaration in module foo}}
38         // [email protected]:12 {{previous declaration is here}}
39