1 files changed, 50 insertions, 0 deletions
diff --git a/clang/test/SemaCXX/warn-using-namespace-in-header.h b/clang/test/SemaCXX/warn-using-namespace-in-header.h
new file mode 100644
index 0000000..b544c54
--- /dev/null
+++ b/clang/test/SemaCXX/warn-using-namespace-in-header.h
@@ -0,0 +1,50 @@
+
+
+
+
+
+// Lots of vertical space to make the error line match up with the line of the
+// expected line in the source file.
+namespace warn_in_header_in_global_context {}
+using namespace warn_in_header_in_global_context;
+
+// While we want to error on the previous using directive, we don't when we are
+// inside a namespace
+namespace dont_warn_here {
+using namespace warn_in_header_in_global_context;
+}
+
+// We should warn in toplevel extern contexts.
+namespace warn_inside_linkage {}
+extern "C++" {
+using namespace warn_inside_linkage;
+}
+
+// This is really silly, but we should warn on it:
+extern "C++" {
+extern "C" {
+extern "C++" {
+using namespace warn_inside_linkage;
+}
+}
+}
+
+// But we shouldn't warn in extern contexts inside namespaces.
+namespace dont_warn_here {
+extern "C++" {
+using namespace warn_in_header_in_global_context;
+}
+}
+
+// We also shouldn't warn in case of functions.
+inline void foo() {
+  using namespace warn_in_header_in_global_context;
+}
+
+
+namespace macronamespace {}
+#define USING_MACRO using namespace macronamespace;
+
+// |using namespace| through a macro should warn if the instantiation is in a
+// header.
+USING_MACRO