1 files changed, 54 insertions, 0 deletions
diff --git a/clang/test/SemaCXX/warn-using-namespace-in-header.cpp b/clang/test/SemaCXX/warn-using-namespace-in-header.cpp
new file mode 100644
index 0000000..72c2552
--- /dev/null
+++ b/clang/test/SemaCXX/warn-using-namespace-in-header.cpp
@@ -0,0 +1,54 @@
+// RUN: %clang_cc1 -fsyntax-only -Wheader-hygiene -verify %s
+
+#include "warn-using-namespace-in-header.h"
+
+namespace dont_warn {}
+using namespace dont_warn;
+
+// Warning is actually in the header but only the cpp file gets scanned.
+// expected-warning {{using namespace directive in global context in header}}
+
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+// Warn inside linkage specs too.
+// expected-warning {{using namespace directive in global context in header}}
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+// expected-warning {{using namespace directive in global context in header}}
+
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+// expected-warning {{using namespace directive in global context in header}}
+
+// |using namespace| through a macro shouldn't warn if the instantiation is in a
+// cc file.
+USING_MACRO