So I've recently come upon a situation where it would be useful to have nested namespaces. The reason is that there are a lot of static functions in a class which I would like to benchmark. Writing the same code to run the benchmark test over and over is very tedious and is much more efficiently accomplished with a macro. However, since the functions are embedded as static functions in a class, it isn't possible to pass the names along as macro parameters, which would make this task much easier. Instead I have to resort to a lot of duplicated parameters or multiple levels of macros (since I can't easily convert :: into a legal member of a function name).
If the functions were embedded instead in a nested namespace, a simple 'using namespace::subspace' declaration would bring all these to top level in the benchmark and all would be well. I've seen conflicting documentation about nested namespace in Apache C++ style guides, so wondering if we could have a discussion on that. Thanks, - Zach
