Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/clang-tools-extra/docs/clang-tidy/checks/google-build-using-namespace.rst

@@ -0,0 +1,19 @@
+.. title:: clang-tidy - google-build-using-namespace
+
+google-build-using-namespace
+============================
+
+Finds ``using namespace`` directives.
+
+The check implements the following rule of the
+`Google C++ Style Guide <https://google.github.io/styleguide/cppguide.html#Namespaces>`_:
+
+  You may not use a using-directive to make all names from a namespace
+  available.
+
+  .. code-block:: c++
+
+    // Forbidden -- This pollutes the namespace.
+    using namespace foo;
+
+Corresponding cpplint.py check name: `build/namespaces`.