llvm-project/clang-tools-extra/docs/clang-tidy/checks/google-build-using-namespac...

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.. 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`.