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-rw-r--r--test/CXX/module/module.unit/p8.cpp40
1 files changed, 40 insertions, 0 deletions
diff --git a/test/CXX/module/module.unit/p8.cpp b/test/CXX/module/module.unit/p8.cpp
new file mode 100644
index 0000000000..aad65272f0
--- /dev/null
+++ b/test/CXX/module/module.unit/p8.cpp
@@ -0,0 +1,40 @@
+// RUN: echo 'export module foo; export int n;' > %t.cppm
+// RUN: %clang_cc1 -std=c++2a %t.cppm -emit-module-interface -o %t.pcm
+// RUN: %clang_cc1 -std=c++2a -fmodule-file=%t.pcm -verify -DMODE=0 %s
+// RUN: %clang_cc1 -std=c++2a -fmodule-file=%t.pcm -verify -DMODE=1 %s
+// RUN: %clang_cc1 -std=c++2a -fmodule-file=%t.pcm -verify -DMODE=2 %s
+// RUN: %clang_cc1 -std=c++2a -fmodule-file=%t.pcm -verify -DMODE=3 %s
+// RUN: %clang_cc1 -std=c++2a -fmodule-file=%t.pcm -verify -DMODE=4 %s
+// RUN: %clang_cc1 -std=c++2a -fmodule-file=%t.pcm -verify -DMODE=5 %s
+
+#if MODE == 0
+// no module declaration
+
+#elif MODE == 1
+// expected-no-diagnostics
+module foo;
+#define IMPORTED
+
+#elif MODE == 2
+export module foo; // expected-error {{redefinition of module 'foo'}}
+// expected-note-re@* {{module loaded from '{{.*}}.pcm'}}
+#define IMPORTED
+
+#elif MODE == 3
+export module bar;
+
+#elif MODE == 4
+module foo:bar; // expected-error {{not yet supported}}
+#define IMPORTED // FIXME
+
+#elif MODE == 5
+export module foo:bar; // expected-error {{not yet supported}} expected-error {{redefinition}} expected-note@* {{loaded from}}
+#define IMPORTED // FIXME
+
+#endif
+
+int k = n;
+#ifndef IMPORTED
+// expected-error@-2 {{declaration of 'n' must be imported from module 'foo' before it is required}}
+// expected-note@* {{previous}}
+#endif