un - using namespace?

[Gernot Frisch]

hi,

for terrible reasons my stdafx.h has:
using namepsace std;
in it. Now, how can I "un-use the namespace in a cpp file, that _must_
include this header?

 

[Karl Heinz Buchegger]

hi,

for terrible reasons my stdafx.h has:
using namepsace std;
in it. Now, how can I "un-use the namespace in a cpp file, that _must_
include this header?

You can't
That's one reason why using a 'using'-directive is a really
bad idea in a header file.

 

[Peter Koch Larsen]

hi,

for terrible reasons my stdafx.h has:
using namepsace std;
in it. Now, how can I "un-use the namespace in a cpp file, that _must_
include this header?

Why not just remove that using directive? You might have to clean-up some
code, but it should not be that difficult and will give cleaner code
afterwards.
An alternative would be to properly qualify the call in the cpp-file.

/Peter

 

[Default User]

Why not just remove that using directive? You might have to clean-up some
code, but it should not be that difficult and will give cleaner code
afterwards.
An alternative would be to properly qualify the call in the cpp-file.

stdafx.h is a implementation header for Visual Studio and maybe other
inplementations, so I wouldn't recommend changing it. However,
searching my VS6.0 files doesn't find a using statement in stdafx.h.

I haven't found it necessary to use this, although it may be required
for MFC or other off-topic stuff. Many people include it reflexively
because certain help files seem to do so. The OP could try taking out
that header and just including the ones actually needed.



Brian

 

[Julie]

You can't
That's one reason why using a 'using'-directive is a really
bad idea in a header file.

and, further, I think that 'using' is just plain bad. Really, it is a band-aid
fix to lazy programmers and code clutter.

 

[Stefan Strasser]

You could consider surrounding the #include directive with another
namespace (if you don't consider that just as bad).

that doesn't work with a lot of headers because they use global scope
qualifiers:

struct A{
struct A{
::A *a;
}
};