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-rw-r--r--clang/test/Modules/same-decl-in-different-modules.cppm42
1 files changed, 42 insertions, 0 deletions
diff --git a/clang/test/Modules/same-decl-in-different-modules.cppm b/clang/test/Modules/same-decl-in-different-modules.cppm
new file mode 100644
index 000000000000..2e8e90f7cd8e
--- /dev/null
+++ b/clang/test/Modules/same-decl-in-different-modules.cppm
@@ -0,0 +1,42 @@
+// RUN: rm -rf %t
+// RUN: mkdir %t
+// RUN: split-file %s %t
+//
+// RUN: %clang_cc1 -std=c++20 %t/mod1.cppm -emit-module-interface -o %t/mod1.pcm
+// RUN: %clang_cc1 -std=c++20 %t/mod2.cppm -emit-module-interface -o %t/mod2.pcm
+// RUN: %clang_cc1 -std=c++20 %t/test.cc -fprebuilt-module-path=%t -fsyntax-only -verify
+
+//--- mod1.cppm
+export module mod1;
+export int v;
+export void func();
+export class A {};
+export template <class C>
+struct S {};
+
+//--- mod2.cppm
+export module mod2;
+export int v;
+export void func();
+export class A;
+export template <class C>
+struct S {};
+
+//--- test.cc
+import mod1;
+import mod2;
+void test() {
+ int value = v;
+ func();
+ A a;
+ S<int> s;
+}
+
+// expected-error@mod1.cppm:* {{declaration 'v' attached to named module 'mod1' can't be attached to other modules}}
+// expected-note@mod2.cppm:* {{}}
+// expected-error@mod1.cppm:* {{declaration 'func' attached to named module 'mod1' can't be attached to other modules}}
+// expected-note@mod2.cppm:* {{}}
+// expected-error@mod1.cppm:* {{declaration 'A' attached to named module 'mod1' can't be attached to other modules}}
+// expected-note@mod2.cppm:* {{}}
+// expected-error@mod1.cppm:* 1+{{declaration 'S' attached to named module 'mod1' can't be attached to other modules}}
+// expected-note@mod2.cppm:* 1+{{}}