1 files changed, 38 insertions, 0 deletions
diff --git a/clang/test/CXX/module/module.interface/p1.cpp b/clang/test/CXX/module/module.interface/p1.cpp
new file mode 100644
index 00000000000..1eba8175de4
--- /dev/null
+++ b/clang/test/CXX/module/module.interface/p1.cpp
@@ -0,0 +1,38 @@
+// RUN: %clang_cc1 -std=c++2a %s -DERRORS -verify
+// RUN: %clang_cc1 -std=c++2a %s -emit-module-interface -o %t.pcm
+// RUN: %clang_cc1 -std=c++2a %s -fmodule-file=%t.pcm -DIMPLEMENTATION -verify -Db=b2 -Dc=c2
+
+module;
+
+#ifdef ERRORS
+export int a; // expected-error {{after the module declaration}}
+#endif
+
+#ifndef IMPLEMENTATION
+export
+#else
+// expected-error@#1 {{can only be used within a module interface unit}}
+// expected-error@#2 {{can only be used within a module interface unit}}
+// expected-note@+2 1+{{add 'export'}}
+#endif
+module M;
+
+export int b; // #1
+namespace N {
+  export int c; // #2
+}
+
+#ifdef ERRORS
+namespace {
+  export int d1; // FIXME: invalid
+  namespace X {
+    export int d2; // FIXME: invalid
+  }
+}
+
+export export int e; // expected-error {{within another export declaration}}
+export { export int f; } // expected-error {{within another export declaration}}
+
+module :private; // expected-note {{private module fragment begins here}}
+export int priv; // expected-error {{export declaration cannot be used in a private module fragment}}
+#endif