1 files changed, 57 insertions, 0 deletions
diff --git a/test/CXX/basic/basic.link/p1.cpp b/test/CXX/basic/basic.link/p1.cpp
new file mode 100644
index 0000000000..c6a119aa7f
--- /dev/null
+++ b/test/CXX/basic/basic.link/p1.cpp
@@ -0,0 +1,57 @@
+// RUN: %clang_cc1 -std=c++2a -verify %s
+// RUN: %clang_cc1 -std=c++2a -verify -DNO_GLOBAL_FRAG %s
+// RUN: %clang_cc1 -std=c++2a -verify -DNO_MODULE_DECL %s
+// RUN: %clang_cc1 -std=c++2a -verify -DNO_PRIVATE_FRAG %s
+// RUN: %clang_cc1 -std=c++2a -verify -DNO_MODULE_DECL -DNO_PRIVATE_FRAG %s
+// RUN: %clang_cc1 -std=c++2a -verify -DNO_GLOBAL_FRAG -DNO_PRIVATE_FRAG %s
+// RUN: %clang_cc1 -std=c++2a -verify -DNO_GLOBAL_FRAG -DNO_MODULE_DECL %s
+// RUN: %clang_cc1 -std=c++2a -verify -DNO_GLOBAL_FRAG -DNO_MODULE_DECL -DNO_PRIVATE_FRAG %s
+// RUN: %clang_cc1 -std=c++2a -verify -DEXPORT_FRAGS %s
+
+#ifndef NO_GLOBAL_FRAG
+#ifdef EXPORT_FRAGS
+export // expected-error {{global module fragment cannot be exported}}
+#endif
+module;
+#ifdef NO_MODULE_DECL
+// expected-error@-2 {{missing 'module' declaration at end of global module fragment introduced here}}
+#endif
+#endif
+
+extern int a; // #a1
+
+#ifndef NO_MODULE_DECL
+export module Foo;
+#ifdef NO_GLOBAL_FRAG
+// expected-error@-2 {{module declaration must occur at the start of the translation unit}}
+// expected-note@1 {{add 'module;' to the start of the file to introduce a global module fragment}}
+#endif
+
+// expected-error@#a2 {{declaration of 'a' in module Foo follows declaration in the global module}}
+// expected-note@#a1 {{previous decl}}
+#endif
+
+int a; // #a2
+extern int b;
+
+module; // expected-error {{'module;' introducing a global module fragment can appear only at the start of the translation unit}}
+
+#ifndef NO_PRIVATE_FRAG
+#ifdef EXPORT_FRAGS
+export // expected-error {{private module fragment cannot be exported}}
+#endif
+module :private; // #priv-frag
+#ifdef NO_MODULE_DECL
+// expected-error@-2 {{private module fragment declaration with no preceding module declaration}}
+#endif
+#endif
+
+int b; // ok
+
+
+#ifndef NO_PRIVATE_FRAG
+#ifndef NO_MODULE_DECL
+module :private; // expected-error {{private module fragment redefined}}
+// expected-note@#priv-frag {{previous definition is here}}
+#endif
+#endif