google-build-namespaces

cert-dcl59-cpp redirects here as an alias for this check. fuchsia-header-anon-namespaces redirects here as an alias for this check.

Finds anonymous namespaces in headers.

https://google.github.io/styleguide/cppguide.html#Namespaces

Corresponding cpplint.py check name: build/namespaces.