Is there a way to embed a class in a new namespace with the same name?

Question

We're attempting to hide a class behind a new namespace, however we'd like to keep the original name.

namespace first {
    class Logger { ... };
}

namespace second {
    using Logger = first::Logger;
}

error: definition of type 'Logger' conflicts with type alias of the same name class Logger;

We are looking to just take specific elements into the new namespace. — Ben Crowhurst, Mar 09 '16 at 00:42
[Works for me](http://coliru.stacked-crooked.com/a/e6126b94eb2c73d5). — Lightness Races in Orbit, Mar 09 '16 at 01:30
Should probably just delete this question in light of the fact that the answer involves is a minor issue unrelated to anything in the question. — Barry, Mar 09 '16 at 04:33

score 1 · Answer 1 · edited May 23 '17 at 12:31

1

Yes we can:

namespace first {
  class Logger {  };
}

namespace second {
  typedef first::Logger Logger;
}

edited May 23 '17 at 12:31

Community

answered Mar 09 '16 at 00:54

Waheed Brown

Probably because I advised to use "typedef" instead of providing a way to do it with "using". – Waheed Brown Mar 09 '16 at 18:53

Ben Crowhurst · Answer 2 · 2016-03-09T03:17:33.057

1

Right-o, this was due to a forward declaration of type class Logger within our own codebase.

namespace first {
    class Logger { ... };
}

namespace second {
    using Logger = first::Logger;

    ... some time later ...
    class Logger;
}

edited Mar 09 '16 at 03:17

answered Mar 09 '16 at 03:09

Ben Crowhurst

2 Answers2