1 files changed, 18 insertions, 0 deletions
diff --git a/tools/clang-tidy/test/misc-unused-alias-decls.cpp b/tools/clang-tidy/test/misc-unused-alias-decls.cpp
new file mode 100644
index 0000000000..1bbaa2db0a
--- /dev/null
+++ b/tools/clang-tidy/test/misc-unused-alias-decls.cpp
@@ -0,0 +1,18 @@
+// https://clang.llvm.org/extra/clang-tidy/checks/misc-unused-alias-decls.html
+
+namespace n1 {
+    namespace n2 {
+         namespace n3 {
+             int qux = 42;
+         }
+    }
+}
+
+namespace n1_unused = ::n1;     // WARNING
+namespace n12_unused = n1::n2;  // WARNING
+namespace n123 = n1::n2::n3;    // OK
+
+int test()
+{
+  return n123::qux;
+}