1 // RUN: rm -fr %t
2 // RUN: mkdir %t
3 // RUN: split-file %s %t
4 //
5 // RUN: %clang_cc1 -std=c++20 -emit-module-interface %t/foo.cppm -o %t/foo.pcm
6 // RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t %t/Use.cpp -verify -fsyntax-only
7 //
8 //--- foo.cppm
9 module;
10 # 3 __FILE__ 1 // use the next physical line number here (and below)
11 template <typename T>
foo()12 void foo() {
13 }
14 
15 template <>
foo()16 void foo<int>() {
17 }
18 
19 template <typename T>
foo2()20 void foo2() {
21 }
22 
23 template <>
foo2()24 void foo2<int>() {
25 }
26 
27 template <typename T>
foo3()28 void foo3() {
29 }
30 
31 template <>
32 void foo3<int>();
33 
34 export module foo;
35 export using ::foo;
36 export using ::foo3;
37 
38 export template <typename T>
foo4()39 void foo4() {
40 }
41 
42 export template <>
foo4()43 void foo4<int>() {
44 }
45 
46 //--- Use.cpp
47 import foo;
use()48 void use() {
49   foo<short>();
50   foo<int>();
51   foo2<short>(); // expected-error {{missing '#include'; 'foo2' must be declared before it is used}}
52                  // expected-note@* {{declaration here is not visible}}
53   foo2<int>();   // expected-error {{missing '#include'; 'foo2' must be declared before it is used}}
54                  // expected-note@* {{declaration here is not visible}}
55   foo3<short>();
56   foo3<int>();
57 
58   foo4<short>();
59   foo4<int>();
60 }
61