worldforge/metaserver-ng — comment on commit ad71d6f0153e48661677866a11689dad89e675ce
File:  line 0
By alriddoch:

As a point of style, it is generally a bad idea to have "using ..." directives in headers. I think I read that in Scott Meyer by I'll have to check the reference. It pollutes the namespace for other files which include this header, but are not concerned about the details of your implementation.

I know this can make headers verbose, but it does help keep code clean as projects get bigger as the names inside namespaces can often be very generic, and it is easy for unintended conflicts to occur.